CN216958351U

CN216958351U - Beam structure, lower shell of battery pack and battery pack

Info

Publication number: CN216958351U
Application number: CN202220605989.9U
Authority: CN
Inventors: 周月
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-07-12
Anticipated expiration: 2032-03-18

Abstract

The utility model provides a beam structure, a lower shell of a battery pack and the battery pack, wherein the beam structure is arranged in the shell of the battery pack and comprises a beam main body made of an insulating material and connecting pieces respectively connected to two ends of the beam main body; and the beam body main body is fixed in the shell through the two connecting pieces. According to the beam body structure, the beam body main body made of the insulating material is beneficial to improving the insulating protection effect of the beam body structure on the battery cell and improving the safety of the battery cell in use, and the beam body structure is fixed in the shell through the connecting pieces connected to the two ends of the beam body main body, so that the beam body structure is convenient to mount in the shell, and has a good using effect.

Description

Beam structure, lower shell of battery pack and battery pack

Technical Field

The utility model relates to the technical field of battery packs, in particular to a beam body structure. Meanwhile, the utility model also relates to a lower shell of the battery pack with the beam structure. In addition, the utility model also relates to a battery pack with the lower shell.

Background

With the rise of pure electric vehicles as new energy vehicles, people pay more and more attention to the safety of electric vehicles. The performance and safety of the battery pack, which is used as the heart of the electric automobile, are the key to determine the safety of the electric automobile.

The lower shell of the battery pack is subjected to the third-generation material replacement of metal plates, cast aluminum and aluminum alloy extruded profiles, the mainstream material of the shell is profile tailor-welding at the present stage, and the shell is strong in bearing capacity, high in light weight degree and simple in processing technology under the profile tailor-welding, and is formed by welding a bottom plate, a transverse longitudinal beam and a frame.

In the prior art, a plurality of beam structures are arranged in the lower shell and used for separating the cavity in the lower shell into a plurality of sub-cavities for installing the battery cell. However, the design of the beam body structure is not reasonable, so that the beam body structure is inconvenient to install on the lower shell, the protection effect on the battery cell is poor, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a beam structure to improve the protection effect of the beam structure on the battery cell.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a beam structure is arranged in a shell of a battery pack and comprises a beam main body made of insulating materials and connecting pieces respectively connected to two ends of the beam main body; and the beam body main body is fixed in the shell through the two connecting pieces.

Furthermore, the beam body main body is made of plastic materials.

Furthermore, the beam body main body is connected with at least one connecting piece in an adhesion mode.

Furthermore, a connecting surface is arranged on the connecting piece, and a matching surface matched with the connecting surface is arranged on the beam body main body; and one of the connecting surface and the matching surface is provided with an adhesive layer, and the adhesive layer is used for connecting the connecting surface and the matching surface.

Furthermore, at least one of the connecting surfaces is in a step shape, and the corresponding matching surface is formed along the connecting surface.

Furthermore, a plurality of first cavities extending along the length direction are formed in the beam body main body; the first cavities are arranged at intervals along the height direction of the beam body main body.

Furthermore, a plurality of second cavities are formed inside the connecting piece; the second cavities are arranged at intervals along the height direction of the connecting piece.

Furthermore, the top of the beam body main body is provided with a plurality of grooves which are arranged at intervals along the length direction of the beam body main body.

Compared with the prior art, the utility model has the following advantages:

according to the beam body structure, the beam body main body made of the insulating material is beneficial to improving the insulating protection effect of the beam body structure on the battery cell and improving the safety of the battery cell in use, and the beam body structure is fixed in the shell through the connecting pieces connected to the two ends of the beam body main body, so that the beam body structure is convenient to mount in the shell, and has a good using effect.

In addition, the beam body main body made of plastic has good insulating effect and is convenient to machine and mold. And the beam body main part is connected with the connecting piece in an adhesive manner, so that the beam body main part is convenient to implement and has a good connecting effect. The arrangement of the connecting surface, the matching surface and the bonding layer is beneficial to improving the bonding effect between the beam body main body and the connecting piece. And the stepped connecting surface and the stepped matching surface are favorable for increasing the connecting strength between the beam body main body and the connecting piece. The first cavity is beneficial to improving the strength of the beam body main body. The plurality of second cavities is beneficial to improving the strength of the connecting piece. And the arrangement of the groove is beneficial to reducing weight.

In addition, another objective of the present invention is to provide a lower case of a battery pack, wherein the lower case has a cavity with an open top, and at least one beam structure as described above is disposed in the lower case; the beam structure extends in a length direction and/or a width direction of the lower case.

The lower shell of the battery pack is beneficial to improving the use safety of the lower shell by arranging the beam body structure, and has better practicability.

In addition, another object of the present invention is to provide a battery pack including the lower case of the battery pack as described above.

According to the battery pack, the lower shell of the battery pack is beneficial to improving the insulation effect of the battery core and the lower shell, so that the safety of the battery pack is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a beam structure according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a beam body according to a first embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural diagram of a connecting member according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a lower housing according to a second embodiment of the present invention;

description of reference numerals:

1. a beam body structure; 2. a lower housing;

101. a beam body main body; 1011. a groove; 1012. a connecting surface; 1013. a first cavity; 102. a connecting member; 1021. a second cavity; 1022. an adhesive layer;

201. a stringer;

100. and (4) sub-cavities.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment relates to a beam structure 1, which is arranged in a shell of a battery pack. In the overall structure, the beam structure 1 includes a beam main body 101 made of an insulating material, and connecting members 102 respectively connected to two ends of the beam main body 101; and the beam body 101 is fixed in the housing via two connectors 102.

An exemplary structure of the beam structure 1 described in the present embodiment is shown in fig. 1 based on the overall description above. The side of the beam body 101 connected to the two connectors 102 is rectangular, and the length of the beam body matches the length or width of the housing, so that the beam body can be conveniently installed in the housing. The housing in this embodiment may specifically adopt a mature structure in the prior art, and includes a lower housing 2 having a cavity and an upper housing buckled on the lower housing 2, where the cavity is used to accommodate the battery cell. The beam structure 1 in this embodiment is specifically provided in the lower case 2.

The structure of the beam body 101 in this embodiment is shown in fig. 2, and the beam body structure 1 may be made of plastic. So set up, not only do benefit to the insulating protective effect who improves between roof beam body structure 1 and the electric core, but also do benefit to the weight that reduces roof beam body structure 1. In practice, the plastic material may be a composite material of glass fiber plus carbon fiber, glass fiber plus PP, or glass fiber plus nylon, according to specific use requirements. At this time, it is advantageous to further improve the structural strength of the beam body main body 101. The proportion between the glass fiber and the carbon fiber or the PP or the nylon can be determined according to the use requirement.

As shown in fig. 2 and 3, in the present embodiment, a plurality of first cavities 1013 extending in the length direction are formed in the beam body main body 101, and the plurality of first cavities 1013 are arranged at intervals in the height direction of the beam body main body 101. The plurality of first cavities 1013 are advantageous in improving the strength of the beam body 101, and thus can improve the use effect and durability of the beam body 101. Here, the specific number of the first cavities 1013 may be determined according to the use requirement.

Continuing with fig. 1 and the drawings, the connecting member 102 in this embodiment is in a block shape, and in practice, as a preferred embodiment, the connecting member 102 is made of a metal material, for example, the connecting member 102 is made of an aluminum material. In order to improve the installation effect of the beam structure 1 in the lower shell 2, the connecting member 102 in this embodiment is welded to the lower shell 2, and the welding connection mode is simple, convenient to implement, and good in connection effect.

In the embodiment, a plurality of second cavities 1021 are formed inside the connecting element 102, and the plurality of second cavities 1021 are arranged at intervals along the height direction of the connecting element 102. The second cavity 1021 is convenient for processing and molding, and is also beneficial to improving the structural strength of the connecting piece 102, so that the connecting piece has a better using effect. Of course, the specific number of the second cavities 1021 can be selected according to the usage requirement.

The two ends of the beam body main body 101 in this embodiment are fixedly connected to the connecting member 102, so as to improve the strength of the whole beam body structure 1. In specific implementation, the beam body 101 is adhesively connected to at least one of the connecting members 102. As shown in fig. 1 and 2, both ends of the beam body main body 101 in the present embodiment are adhesively connected to the corresponding connecting members 102, which is advantageous to improve the operational convenience and the assembly efficiency of the connection between the beam body main body 101 and the connecting members 102.

In order to achieve the adhesion effect between the beam body 101 and the connecting member 102, as a preferred embodiment, the connecting member 102 is provided with a connecting surface 1012, and the beam body 101 is provided with a mating surface matching the connecting surface 1012. An adhesive layer 1022 is provided on one of the connecting surface 1012 and the mating surface, and the adhesive layer 1022 is used to connect the connecting surface 1012 and the mating surface, thereby achieving the fixed connection between the beam body main body 101 and the connecting member 102. Detailed structural considerations referring to fig. 4, an adhesive layer 1022 is disposed on the attachment surface 1012, where the adhesive layer 1022 may be made of a structural adhesive applied to the attachment surface 1012. The product of the structural adhesive is mature, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, and has stable performance in the expected life.

In order to further improve the bonding strength between the beam body 101 and the connecting member 102, as shown in fig. 2 and 4, each connecting surface 1012 in this embodiment is stepped, and the corresponding mating surface is also stepped along the connecting surface 1012. The ladder-shaped structure is simple, the processing and forming are convenient, the bonding length between the connecting surface 1012 and the matching surface is increased, and the bonding strength and the stability between the beam body main body 101 and the connecting member 102 are improved. It will be appreciated that a stepped arrangement of only one of the attachment surfaces 1012 and the corresponding end surface of the beam body 101 is also possible.

It should be noted that, in this embodiment, in addition to the fixed connection manner of adhesion, other structural forms capable of achieving fixed connection between the two ends of the beam body main body 101 and the connecting member 102 may also be adopted.

Further, as shown in fig. 1 and 2, a plurality of grooves 1011 are provided at intervals in the length direction of the beam body 101 at the top thereof in the present embodiment. A plurality of recesses 1011 not only can play and subtract heavy effect, but also can be used for the installation to support the bubble cotton to play better supporting effect to the great last casing of amplitude. In specific implementation, the position and the number of the grooves 1011 can be selected according to the use requirement.

When the beam structure 1 in this embodiment is installed, the connecting members 102 are respectively welded and fixed to the lower housing 2, and then the two ends of the beam main body 101 are respectively bonded and fixedly connected to the corresponding connecting members 102.

This embodiment beam body structure 1 through the beam body main part 101 of being made by insulating material, do benefit to and improve beam body structure 1 to the insulating protective effect of electric core, and do benefit to and improve electric core in use's security to be fixed in the casing through connecting in the connecting piece 102 at beam body main part 101 both ends, thereby be convenient for the installation of beam body structure 1 in the casing, and have better result of use.

Example two

The present embodiment relates to a lower case 2 of a battery pack, and the lower case 2 has a cavity with an open top. At least one beam structure 1 as described in the first embodiment is disposed in the lower casing 2, and the beam structure 1 extends along the length direction and/or the width direction of the lower casing 2.

An exemplary structure of the lower case 2 described in the present embodiment is shown in fig. 5 based on the overall description above. Be equipped with a plurality of beam structure 1 that set up along the width direction extension of casing 2 down in the appearance chamber of casing 2 down, and a plurality of beam structure 1 along casing 2's length direction interval arrangement down, the terminal surface of two connecting pieces 102 welds respectively on casing 2's lateral wall down, and at this moment, beam structure 1 constitutes casing 2's crossbeam down.

A longitudinal beam 201 is further disposed in the lower case 2, which is located in the middle of the lower case 2 in the width direction and extends along the length direction of the lower case 2. The longitudinal beam 201 is provided orthogonal to the plurality of beam structures 1. In order to facilitate the installation of the longitudinal beam 201, an avoiding hole allowing the longitudinal beam 201 to pass through is further formed in the middle of the beam body main body 101. In this embodiment, the plurality of beam structures 1 and the longitudinal beam 201 are mutually matched, and the cavity is divided into a plurality of sub-cavities 100 by two, and the battery cells are arranged in each sub-cavity 100 side by side.

It can be understood that, in the present embodiment, the number of the beam body structures 1 as the cross beams can be determined according to the use requirement. In addition, according to specific use requirements, the longitudinal beam 201 is not arranged in the cavity. In the first embodiment, it is also feasible to provide only one of the cross beams or the longitudinal beams 201 as the beam body structure 1 in the first embodiment.

The lower casing 2 of battery package in this embodiment through setting up as above roof beam body structure 1, can improve the insulating protective effect of casing 2 down, and has better practicality.

Further, the present embodiment also relates to a battery pack including the lower case 2 of the battery pack as described above.

The battery pack in this embodiment, through the lower casing 2 of battery pack as described above, does benefit to the insulating protective effect who improves electric core and casing 2 down to do benefit to the security that improves the battery pack.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a roof beam body structure, locates the casing of battery package, its characterized in that:

the beam body structure (1) comprises a beam body main body (101) made of insulating materials and connecting pieces (102) respectively connected to two ends of the beam body main body (101);

and the beam body main body (101) is fixed in the shell through the two connecting pieces (102).

2. The beam structure of claim 1, wherein:

the beam body main body (101) is made of plastic materials.

3. The beam structure according to claim 1, wherein:

the beam body main body (101) is connected with at least one connecting piece (102) in an adhesive mode.

4. The beam structure according to claim 3, wherein:

a connecting surface (1012) is arranged on the connecting piece (102), and a matching surface matched with the connecting surface (1012) is arranged on the beam body main body (101);

an adhesive layer (1022) is arranged on one of the connecting surface (1012) and the matching surface, and the adhesive layer (1022) is used for connecting the connecting surface (1012) and the matching surface.

5. The beam structure according to claim 4, wherein:

at least one of the connecting surfaces (1012) is stepped, and the corresponding matching surface follows the connecting surface (1012).

6. The beam structure of claim 1, wherein:

a plurality of first cavities (1013) extending along the length direction are formed in the beam body main body (101);

the first cavities (1013) are arranged at intervals in the height direction of the beam body (101).

7. The beam structure of claim 1, wherein:

a plurality of second cavities (1021) are formed inside the connecting piece (102);

the second cavities (1021) are arranged at intervals along the height direction of the connecting piece (102).

8. The beam structure according to any one of claims 1 to 7, wherein:

the top of the beam body main body (101) is provided with a plurality of grooves (1011) which are arranged at intervals along the length direction of the beam body main body.

9. A lower casing of battery package, lower casing (2) have open-topped appearance chamber, its characterized in that:

-at least one beam structure (1) according to any one of claims 1 to 8 is provided in the lower shell (2);

the beam structure (1) extends in the length direction and/or the width direction of the lower shell (2).

10. A battery pack, comprising:

the battery pack includes the lower case (2) of the battery pack according to claim 9.