CN221176489U - Battery pack lower box body, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery pack lower box body, a battery pack and a vehicle, wherein the battery pack lower box body comprises a box body and a plurality of inner cross beams, the inner cross beams are arranged in the box body at intervals along the length direction of the box body, the inner cross beams are used for fixing a battery module, and the distance between two adjacent inner cross beams is adjustable. The technical scheme of the utility model can improve the assembly universality of the lower box body of the battery pack.

Description

Battery pack lower box body, battery pack and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a battery pack lower box body, a battery pack and a vehicle.

Background

Because the electric quantity demand of difference, the model of the battery module in the battery package is also different, in order to ensure that the battery module can be matched with lower box, need the different lower box of design, the box often needs to redesign mould, structure etc. under the independent design battery package to the production of the different lower box of convenience has greatly increased the cost.

Disclosure of utility model

The utility model mainly aims to provide a battery pack lower box body, which aims to improve the assembly universality of the battery pack lower box body.

In order to achieve the above object, the battery pack lower case according to the present utility model includes:

A case body; and

The inner cross beams are arranged in the box body at intervals along the length direction of the box body, and are used for fixing the battery modules, and the distance between every two adjacent inner cross beams is adjustable.

Optionally, the plurality of inner cross beams include inner side beams, the box body has two first inner side walls oppositely disposed in a length direction of the box body, and two second inner side walls oppositely disposed in a width direction of the box body;

The inner side beam is arranged on the inner bottom wall of the box body, two ends of the inner side beam are respectively connected with the two second inner side walls, and one of the two side parts is connected with one first inner side wall.

Optionally, the plurality of inner beams includes two inner side beams and at least one partition beam, and the partition beam is located between the two inner side beams.

Optionally, at least one of the inner side beam, the inner anti-collision beam and the separation beam is configured with a plurality of models, and the different models are different in the dimension of the box body in the length direction, and the different models are replaced to adjust the interval between the adjacent two inner cross beams.

Optionally, the box body further includes an inner impact beam connected between the first inner sidewall and the inner boundary beam.

Optionally, the inner anti-collision beams are provided in plurality and are arranged at intervals along the width direction of the box body.

Optionally, the positions of the inner cross beams are adjustable so as to adjust the distance between two adjacent inner cross beams.

Optionally, the battery pack lower box body further comprises an outer cross beam, and the outer cross beam and the inner cross beam are correspondingly arranged.

Optionally, the outer beam has a first side and a second side, and the inner beam has a third side and a fourth side;

At least one of the first side and the second side is welded to the third side or the fourth side.

Optionally, the surfaces of the first side, the second side, the third side, the fourth side and the box body are respectively configured as a first connecting surface, a second connecting surface, a third connecting surface and a fourth connecting surface;

The heights of the first connecting surface and the second connecting surface are different;

the third connecting surface and the fourth connecting surface are the same in height.

Optionally, the battery pack lower box body further comprises an outer anti-collision beam, the outer anti-collision beam extends along the length direction of the box body, one end of the outer anti-collision beam is connected with an outer cross beam located at the outermost side, and the other end of the outer anti-collision beam extends in a direction away from the other outer cross beams.

Optionally, the battery pack lower box body further comprises a bottom reinforcement beam, and at least one bottom reinforcement beam is arranged between any two adjacent outer cross beams.

Optionally, a distance between the outer cross beam and the bottom reinforcement beam and/or a distance between two adjacent bottom reinforcement beams is adjustable.

The utility model also provides a battery pack, which comprises the battery pack lower box body.

The utility model also proposes a vehicle comprising a battery pack as described above.

According to the technical scheme, the plurality of inner cross beams are arranged in the box body to assist in assembling of the battery modules, the distance between two adjacent cross beams is adjustable, the battery modules with different sizes can be assembled adaptively according to electricity consumption requirements, and further the requirement that the box body can be compatible with the battery modules with different sizes is met, so that the universality of the box body under the battery pack is improved, the development period of the battery pack is shortened, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first view of an embodiment of a lower case of a battery pack according to the present utility model;

FIG. 2 is a top view of the lower case of the battery pack of FIG. 1;

FIG. 3 is a schematic view of the structure of the inner beam position offset in FIG. 2;

Fig. 4 is an exploded view of the lower case of the battery pack of fig. 1;

fig. 5 is a schematic view illustrating a structure of the battery pack of fig. 1 at a second view angle;

FIG. 6 is a top view of the lower case of the battery pack of FIG. 5;

Fig. 7 is a schematic view of the structure of the bottom reinforcement beam of fig. 6 with a positional offset.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				10	Box body	40	Outer cross beam
20	Inner cross beam	41	First side edge
				21	Third side edge	42	Second side edge
22	Fourth side edge	43	Bottom reinforcement beam
				23	Inner side beam	50	Outer crashproof roof beam
24	Separation beam	60	Energy absorption box
				30	Inner anti-collision beam	70	Lateral protection beam

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is 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 addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a battery pack lower box body.

Referring to fig. 1 to 7, in an embodiment of the present utility model, the battery pack lower case includes a case body 10 and a plurality of inner cross members 20; the multiple inner cross beams 20 are arranged at intervals in the box body 10 along the length direction of the box body 10, the inner cross beams 20 are used for fixing battery modules, the distance between every two adjacent inner cross beams 20 is adjustable, and then the battery modules with different sizes can be assembled adaptively according to electricity consumption requirements, so that the assembly universality of the box body under the battery pack is improved.

The box body 10 can be an integrally formed part, so that the processing procedure can be simplified, the number of parts is reduced, the cost is further saved, and the light-weight design is realized; the interval of many interior crossbeams 20 sets up in case body 10, and be used for with battery module's end connection, make things convenient for battery module's bottom and the fixed of case body 10, wherein, interval between two adjacent interior crossbeams 20 is adjustable, namely, according to the battery module of equidimension, adjust the interval between two adjacent interior crossbeams 20 in order to adapt to battery module's size, ensure that the battery module of equidimension homoenergetic is matees with case body 10, realize that a case body 10 can compatible equidimension battery module, promote the assembly commonality of the lower box of battery package, shorten the development cycle of battery package, the cost is reduced.

In the technical scheme of the utility model, the box body 10 is internally provided with the plurality of inner cross beams 20 to assist in assembling the battery modules, wherein the distance between two adjacent cross beams is adjustable, so that the battery modules with different sizes can be assembled adaptively according to electricity consumption requirements, and the requirement that the box body 10 can be compatible with the battery modules with different sizes is further met, thereby improving the universality of the box body under the battery pack, shortening the development period of the battery pack and reducing the cost.

Referring to fig. 1 and 4, in an embodiment, the plurality of inner cross members 20 include inner side members 23, and the case body 10 has two first inner side walls disposed opposite to each other in a length direction of the case body 10, and two second inner side walls disposed opposite to each other in a width direction of the case body 10; the inner side beam 23 is disposed on an inner bottom wall of the case body 10, and two ends thereof are respectively connected to two of the second inner side walls, and one of two side portions is connected to one of the first inner side walls. Specifically, place the roof beam 23 on the diapire, be connected with two second inside walls respectively through the both ends of roof beam 23, a side is connected with a first inside wall, perhaps be connected with interior bottom wall through the bottom of roof beam 23, both ends top is supported two second inside walls, a lateral part is connected with a first inside wall, and then realize the assembly of roof beam 23, so, because of the roof beam 23 with a first inside wall, two second inside walls and the connection of diapire, the structural strength of the box wall that connects is reliably strengthened, and then the structural strength of the lower box of promotion battery package.

Specifically, the side portion of the inner side rail 23 may be directly closely attached to the first inner side wall, and may also be connected to the first inner side wall through a transfer beam.

Referring to fig. 1, in an embodiment, the plurality of inner beams 20 includes two inner side beams 23 and at least one partition beam 24, the partition beam 24 is located between the two inner side beams 23, two ends of the two inner side beams 23 are respectively connected with two first inner side walls, a side portion of one inner side beam 23 is close to and closely attached to a first inner side wall of the case body 10, a side portion of the other inner side beam 23 is connected with another first inner side wall of the case body 10 through a transfer beam, and the partition beam 24 is disposed between the two inner side beams 23 to divide a space between the two first inner side walls, and the battery module may be assembled between the inner side beams 23 and the partition beam 24, or may be assembled between the partition beam 24 and the partition beam 24.

Referring to fig. 2 to 3 and 6 to 7, in an embodiment, at least one of the inner side beam 23 and the partition beam 24 is configured with a plurality of models, and the sizes of the different models in the length direction of the case body 10 are different, and the different models are replaced to adjust the interval between the adjacent two inner side beams 20, it is understood that in order to enable the case body 10 to be compatible with battery modules of different sizes, the inner side beam 23 may be configured with a plurality of models, and the sizes of the respective models are different, the partition beam 24 may be configured with a plurality of models, and the sizes of the respective models are different, and further, when the interval between the adjacent two inner side beams 20 needs to be adjusted to match battery modules of different sizes, the partition beam 24 may be replaced only with the model, or the inner side beam 23 may be replaced with the model, and the partition beam 24 and the inner side beam 23 may be replaced simultaneously.

In order to further reduce structural deformation of the tank body 10 caused by a collision, in an embodiment, the tank body 10 further includes an inner anti-collision beam 30, the inner anti-collision beam 30 is connected between the first inner side wall and the inner side beam 23, it is understood that the inner anti-collision beam 30 extends along the length direction of the tank body 10, two ends of the inner anti-collision beam 30 are respectively connected with the first inner side wall and the inner side beam 23, and in a limited collision condition, the inner anti-collision beam 30 is connected with the first inner side wall, so that the inner anti-collision beam 30 collapses and absorbs energy by receiving the impact force transmitted by the first inner side wall, so that the impact force is reduced, and the inner side beam 23 can bear the force together with the inner anti-collision beam 30, so that the collision protection performance of the side part of the tank body 10 is greatly enhanced, and the risk of invading internal devices is reduced.

Specifically, the inner side beam 23, the inner anti-collision beam 30 and the inner side wall of the box body 10 jointly define a containing cavity for assembling electrical devices, so that the electrical devices can be protected by the arrangement of the inner anti-collision beam 30, and the normal use of the battery pack is ensured. The inner side beam 23 and the inner impact beam 30 are fixed into an integrated structure by, for example, welding and integrated molding, so that the connection strength between the inner side beam 23 and the inner impact beam 30 is improved.

More specifically, in an embodiment, a plurality of inner anti-collision beams 30 are provided and are arranged at intervals along the width direction of the box body 10, wherein each inner anti-collision beam 30 can be arranged at intervals and are not connected with each other, so that local reinforcement of the structure is realized; or each inner anti-collision beam 30 is arranged at intervals, and two adjacent inner anti-collision beams 30 are connected through a bridge, so that the connecting surface between the inner anti-collision beams and the inner side wall is enlarged, a larger stress surface is provided, the strengthening of the whole structure and the improvement of the unloading effect are facilitated.

In addition, the model of the inner impact beam 30 can be changed according to the change of the model of the inner edge beam 23, and when the distance between the inner edge beam 23 and the inner side wall is changed, the change of the distance is adapted by changing the model of the inner impact beam 30, so that the protection effect of the inner impact beam 30 is realized.

Referring to fig. 2 to 3, in an embodiment, the positions of the inner cross members 20 are adjustable to adjust the spacing between two adjacent inner cross members 20, it is understood that the position of one inner cross member 20 is unchanged and is used as a reference for adjusting the positions of the other inner cross members 20, and further, the positions of the other inner cross members 20 in the case body 10 are adjusted according to the assembly requirement of the battery module, so as to meet the spacing adjustment requirement between two adjacent inner cross members 20.

In another embodiment, at least one of the inner side beams 23, the inner impact beams 30 and the partition beams 24 is configured with a plurality of models, and the sizes of the different models in the length direction of the tank body 10 are different, the different models are changed to adjust the interval between the adjacent two inner cross beams 20, and the positions of the inner cross beams 20 are adjustable.

Referring to fig. 4 to 7, in an embodiment, the lower case of the battery pack further includes an outer beam 40, the outer beam 40 is disposed corresponding to the inner beam 20, specifically, the position of the outer beam 40 may be adjusted according to the position adjustment of the inner beam 20, and each outer beam 40 is configured with a plurality of models, and the sizes of the models in the length direction of the case body 10 are different, so that the structural strength of the mounting area equipped with the inner beam 20 may be further enhanced, the battery module may be conveniently supported together with the inner beam 20, and the stress may be commonly born.

Further, in one embodiment, the outer beam 40 has a first side 41 and a second side 42, and the inner beam 20 has a third side 21 and a fourth side 22; at least one of the first side 41 and the second side 42 is welded to the third side 21 or the fourth side 22, so as to ensure the corresponding arrangement of the inner beam 20 and the outer beam 40, and the connection convenience of the inner beam 20, the box body 10 and the outer beam 40.

Alternatively, in an embodiment, the surfaces of the first side 41, the second side 42, the third side 21, and the fourth side 22 connected to the tank body 10 are configured as a first connection surface, a second connection surface, a third connection surface, and a fourth connection surface, respectively; the heights of the first connecting surface and the second connecting surface are different, so that the structure of the outer bottom wall of the box body 10 is conveniently adapted, the close fitting of the outer cross beam 40 and the box body 10 is ensured, and the connection reliability of the outer cross beam 40 and the box body 10 is improved; however, in other embodiments, the first connection surface and the second connection surface are at the same height.

The third connecting surface and the fourth connecting surface have the same height, so that the structure of the inner bottom wall of the box body 10 is convenient to adapt, the close fitting of the inner cross beam 20 and the box body 10 is ensured, and the connection reliability of the inner cross beam 20 and the box body 10 is improved; however, in other embodiments, the third connection surface and the fourth connection surface are at the same height.

Referring to fig. 5, in an embodiment, the lower case of the battery pack further includes an outer impact beam 50, the outer impact beam 50 extends along the length direction of the case body 10, one end of the outer impact beam is connected with the outer cross beam 40 located at the outermost side, and the other end of the outer impact beam extends in a direction away from the remaining outer cross beam 40, it is understood that the outer impact beam 50 is vertically connected with the outer cross beam 40 and may be disposed corresponding to the inner impact beam 30, and receives impact force together with the inner impact beam 30 under the limit impact condition, thereby further improving the impact protection performance of the side portion of the case body 10.

Optionally, in an embodiment, the lower case of the battery pack further includes a bottom reinforcement beam 43, at least one bottom reinforcement beam 43 is disposed between any two adjacent outer beams 40, and the bottom reinforcement beam 43 is connected with the outer bottom wall of the case body 10 and is located below the battery module, so that the battery module can be supported in an auxiliary manner, and the structural strength of the bottom of the case body 10 can be improved. A plurality of bottom reinforcing beams 43 are arranged between two adjacent outer cross beams 40, and the bottom reinforcing beams 43 are uniformly distributed at intervals and uniformly stressed.

Further, in an embodiment, the distance between the outer beam 40 and the bottom reinforcement beam 43, and/or between two adjacent bottom reinforcement beams 43 may be adjustable, so that, in cooperation with the adjustment of the distance between two adjacent inner beams 20 or two adjacent outer beams 40, the position or size of the bottom reinforcement beam 43 may be reliably adjusted, so as to reasonably assist in dispersing the stress of the tank bottom plate, and facilitate the improvement of the structural strength of the tank body 10.

Optionally, in an embodiment, the lower battery pack case further includes an energy-absorbing box 60, where the energy-absorbing box 60 is connected to the first outer sidewall of the case body 10 and separately located on two opposite sides of the inner cross beam 20 with the inner anti-collision beam 30, and further, the energy-absorbing box 60 is matched with the setting of the inner anti-collision beam 30, so that the collision protection performance of the lower battery pack case in the length direction thereof can be improved.

Optionally, in an embodiment, the lower battery pack case body further includes two lateral protection beams 70, two lateral protection beams 70 are disposed at intervals along the width direction of the case body 10, and respectively cover two second outer side walls of the case body 10, and a buffering energy absorption cavity is formed between the lateral protection beams 70 and the second outer side walls, and further, through the arrangement of the buffering energy absorption cavity, collision protection performance of the lower battery pack case body in the width direction of the lower battery pack case body is effectively improved. Further, the lateral protection beam 70 may connect the energy-absorbing box 60 and the outer cross beam 40, so, when the lateral protection beam 70 is collided, the energy-absorbing box 60 and the outer cross beam 40 can realize auxiliary unloading force, disperse and absorb impact force received by the lateral protection beam 70, improve the overall collision protection performance of the lower case of the battery pack, and improve the use safety of the battery pack.

The utility model also provides a battery pack, which comprises a battery pack lower box body, and the specific structure of the battery pack lower box body refers to the embodiment, and because the battery pack adopts all the technical schemes of all the embodiments, the battery pack at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The utility model also provides a vehicle, which comprises a battery pack, wherein the specific structure of the battery pack refers to the embodiment, and the vehicle adopts all the technical schemes of all the embodiments, so that the vehicle at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (15)

1. A battery pack lower case, comprising:

A case body; and

The inner cross beams are arranged in the box body at intervals along the length direction of the box body, and are used for fixing the battery modules, and the distance between every two adjacent inner cross beams is adjustable.

2. The battery pack lower case according to claim 1, wherein the plurality of inner cross members includes an inner side rail, the case body has two first inner side walls disposed opposite to each other in a length direction of the case body, and two second inner side walls disposed opposite to each other in a width direction of the case body;

The inner side beam is arranged on the inner bottom wall of the box body, two ends of the inner side beam are respectively connected with the two second inner side walls, and one of the two side parts is connected with one first inner side wall.

3. The battery under-pack case according to claim 2, wherein the plurality of inner cross members includes two of the inner side members and at least one partition beam, the partition beam being located between the two inner side members.

4. The battery pack lower case according to claim 3, wherein at least one of the inner side beam and the partition beam is provided with a plurality of models, and different models are different in size in the length direction of the case body, and different models are replaced to adjust the interval between adjacent two of the inner cross beams.

5. The battery under-pack case of claim 2, wherein the case body further comprises an inner impact beam connected between the first inner sidewall and the inner edge beam.

6. The battery pack lower case according to claim 5, wherein the inner impact beams are provided in plurality and are spaced apart in a width direction of the case body.

7. The battery pack lower case according to any one of claims 1 to 6, wherein the positions of the inner cross members are adjustable to adjust the interval between adjacent two of the inner cross members.

8. The battery pack lower case of claim 1, further comprising an outer beam disposed in correspondence with the inner beam.

9. The battery under-pack case according to claim 8, wherein the outer beam has a first side and a second side, and the inner beam has a third side and a fourth side;

At least one of the first side and the second side is welded to the third side or the fourth side.

10. The battery pack lower case according to claim 9, wherein surfaces of the first side, the second side, the third side, the fourth side, and the case body are configured as a first connection surface, a second connection surface, a third connection surface, and a fourth connection surface, respectively;

The heights of the first connecting surface and the second connecting surface are different;

the third connecting surface and the fourth connecting surface are the same in height.

11. The battery pack lower case according to claim 8, further comprising an outer impact beam extending in a length direction of the case body, one end being connected to an outer cross member located at an outermost side, and the other end extending in a direction away from the remaining outer cross members.

12. The battery pack lower case of claim 8, further comprising a bottom reinforcement beam, at least one bottom reinforcement beam being disposed between any adjacent two of the outer beams.

13. The battery under-pack case according to claim 12, wherein a distance between the outer cross member and the bottom reinforcement beam and/or between adjacent two of the bottom reinforcement beams is adjustable.

14. A battery pack comprising the battery pack lower case according to any one of claims 1 to 13.

15. A vehicle comprising the battery pack of claim 14.