CN220106755U

CN220106755U - Battery box, battery pack and vehicle

Info

Publication number: CN220106755U
Application number: CN202321429515.4U
Authority: CN
Inventors: 李选; 曹伦; 刘晨南
Original assignee: Ningxia Baofeng Yuneng Technology Co Ltd
Current assignee: Ningxia Baofeng Yuneng Technology Co Ltd
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2023-11-28
Anticipated expiration: 2033-06-06

Abstract

The utility model discloses a battery box, a battery pack and a vehicle, and relates to the technical field of batteries. The battery box includes: the box cover, the installing support and the box body that adopts sheet metal integrated into one piece to make. The mounting bracket comprises a first rod-shaped object and a second rod-shaped object which are connected in a cross mode, the first rod-shaped object and the second rod-shaped object are fixed on the bottom wall of the box body accommodating cavity through the bonding layer, the box cover is connected with the edge of an opening of the box body, and a buffer layer is arranged on one side, deviating from the box body, of the box cover. According to the battery box provided by the utility model, the mounting bracket is fixed on the bottom wall of the accommodating cavity in an adhesion manner, compared with the existing welding manner, the battery box is not easy to deform, small in mounting error and high in structural strength, meanwhile, the buffer layer is arranged on one side of the box cover, which is away from the box body, and after the box cover is fixed with the frame, the buffer layer can reduce the rigid contact between the box cover and the frame, so that the structural stability of the battery box is improved, the service life of the battery box is prolonged, and the product competitiveness is improved.

Description

Battery box, battery pack and vehicle

Technical Field

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

Background

Battery packs (Battery packs) are an important component of electric vehicles, and are mainly used for providing power sources for electric vehicles.

In the related art, a battery pack has a battery case and a battery module, and when the battery pack is assembled, a mounting bracket is welded to the inner bottom wall of the battery case for fixing the battery module, and then a case cover of the battery case is fixed to a vehicle frame.

However, the welding mounting bracket easily causes the deformation of the box body of the battery box, so that the deviation of the size of the box body and the mounting hole site is generated, the structural strength of the battery box is reduced, and meanwhile, in the running process of the vehicle, the shaking of the vehicle frame easily causes stress concentration and fatigue crack generation of a connecting point due to the rigid contact of the box cover and the vehicle frame, so that the breakage is caused. The above-mentioned circumstances lead to the structural strength and the stability of battery box lower, influence the life of battery box.

Disclosure of Invention

Accordingly, the present utility model is directed to a battery case, a battery pack and a vehicle, and aims to solve the technical problems of the prior art that the structural strength and stability of the battery case are low and the service life of the battery case is affected.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

in a first aspect, an embodiment of the present utility model provides a battery box including:

the box body is formed by integrally forming a metal plate, and is provided with a containing cavity and an opening communicated with the containing cavity;

a mounting bracket comprising a first rod-shaped object and a second rod-shaped object which are connected in a cross way, wherein the first rod-shaped object and the second rod-shaped object are fixed on the bottom wall of the accommodating cavity through an adhesive layer, and the mounting bracket is used for fixing the battery module in the accommodating cavity;

the box cover is connected with the edge of the opening so as to seal the accommodating cavity, and a buffer layer is arranged on one side, away from the box body, of the box cover.

In one embodiment of the first aspect, a first annular connecting portion is arranged on one side, close to the box body, of the box cover, a second annular connecting portion is arranged on the edge of the opening, and the second annular connecting portion is provided with a crest surface and a trough surface;

the wave crest faces and the wave trough faces are alternately arranged, the wave crest faces are in face contact with the first annular connecting portion, and the wave trough faces are fixedly connected with the first annular connecting portion through threaded fasteners.

In one embodiment of the first aspect, the case includes a bottom plate and a shroud, the shroud is enclosed around the bottom plate and connected with the bottom plate to define the accommodating cavity and the opening, and a portion of an outer wall of the shroud is recessed toward the accommodating cavity to form a first groove.

In one embodiment of the first aspect, a portion of the bottom wall of the accommodating cavity is recessed in a direction away from the case cover to form a second groove, and the second shaft is at least partially accommodated in the second groove and is fixed to a wall of the second groove through the adhesive layer.

In one embodiment of the first aspect, the first shaft is centrally disposed on a bottom wall of the accommodating cavity, and the second shafts are plural and spaced apart along a length direction of the first shaft.

In one embodiment of the first aspect, a plurality of sections of reinforcing ribs are arranged at intervals on one side of the case cover, which faces away from the case body, and the buffer layer is arranged between two adjacent sections of reinforcing ribs.

In one embodiment of the first aspect, the first shaft and the second shaft are each hollow aluminum profiles.

In one embodiment of the first aspect, the metal plate is an aluminum plate, and the case is formed by integrally stamping the aluminum plate.

In a second aspect, embodiments of the present utility model also provide a battery pack including the battery box described in any of the above embodiments.

In a third aspect, embodiments of the present utility model also provide a vehicle including the battery pack described in the above embodiments.

The beneficial effects of the utility model are as follows:

according to the battery box provided by the utility model, the first rod-shaped object and the second rod-shaped object are fixed on the bottom wall of the accommodating cavity of the box body through the bonding layer, namely, the mounting bracket is fixed on the bottom wall of the accommodating cavity in a bonding mode, compared with the existing welding mode, the battery box is not easy to deform, small in mounting error and high in structural strength, meanwhile, the box body is integrally formed by adopting a metal plate, the structural strength is high, the buffer layer is arranged on one side of the box cover, which is far away from the box body, and after the box cover is fixed with the frame, the rigid contact between the box cover and the frame can be reduced by the buffer layer, so that the structural stability of the battery box is improved, the service life of the battery box is prolonged, and the product competitiveness is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a battery box according to some embodiments of the utility model;

FIG. 2 illustrates an exploded view of another view of a battery box in some embodiments of the utility model;

FIG. 3 shows a schematic diagram of the structure of the portion A in FIG. 2;

FIG. 4 is a schematic view of a structure of a case according to some embodiments of the utility model;

FIG. 5 is a schematic view of a cover in accordance with some embodiments of the utility model;

fig. 6 illustrates a schematic view of a perspective structure of a mounting bracket according to some embodiments of the utility model.

Description of main reference numerals:

100-battery box; 110-a buffer layer; 120-case cover; 121-top plate; 1211-reinforcing bars; 122-a ring frame; 123-a first annular connection; 1231-fitting hole; 130-a box body; 131-a receiving chamber; 132-open; 133-a second annular connection; 1331-peak surface; 1332-trough surfaces; 134-a bottom plate; 1341-second groove; 135-coaming; 1351-a first groove; 13511-first groove wall; 13512-second groove wall; 1352-opening; 140-mounting brackets; 141-a first shaft; 142-a second shaft; 1421-mounting holes.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

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

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1, in a first aspect, an embodiment of the present utility model provides a battery box 100, which relates to the field of battery technology and is mainly applied to vehicles, such as new energy automobiles and fuel automobiles.

It should be noted that, the vehicle has a battery pack and a frame, the battery pack mainly includes a battery box 100 and a battery module fixed in the battery box 100, and the battery module is composed of a plurality of electric cells for storing and releasing electric energy.

As shown in fig. 1, the battery box 100 mainly includes: a case 130, a mounting bracket 140, and a case cover 120.

Wherein, the case 130 is integrally formed of a metal plate, such as a copper plate or an aluminum plate, so that the case 130 has high structural strength, and the use of connecting members and structural members is reduced, thereby reducing the weight of the case 130.

As shown in fig. 1 and 2, the case 130 has a receiving chamber 131 and an opening 132 communicating with the receiving chamber 131, and the mounting bracket 140 is used for fixing the battery module in the receiving chamber 131, and includes a first rod 141 and a second rod 142, where the first rod 141 and the second rod 142 are cross-connected, for example, the first rod 141 is perpendicular to the second rod 142, or the first rod 141 and the second rod 142 are disposed at other angles, such as 60 °, 65 °, 80 °, 120 °.

The first shaft 141 and the second shaft 142 are fixed to the bottom wall of the accommodating cavity 131 by an adhesive layer, and the adhesive layer may be set glue, so as to bond the mounting bracket 140 to the bottom wall of the accommodating cavity 131. The cover 120 is connected to an edge of the opening 132 to close the receiving chamber 131, and a side of the cover 120 facing away from the case 130 is provided with a buffer layer 110, such as a silica gel pad, a rubber pad, a sponge, etc.

Illustratively, the wall thickness of the case 130 may be set to 2mm, 3mm, 4mm, 4.5mm, etc., and in this embodiment, the wall thickness of the case 130 is preferably 2mm, so that the weight is light on the premise that the structural strength of the case can meet the use requirement, thereby being beneficial to improving the battery energy density of the battery pack and enhancing the cruising duration of the vehicle.

In addition, the thickness of the buffer layer 110 may be set to 1mm, 1.5mm, 1.6mm, 2mm, 3mm, etc., so that it has a better buffer performance.

When the existing battery pack is assembled, an installing support is welded on the inner bottom wall of a battery box and used for fixing a battery module, and then a box cover of the battery box is fixed on a frame.

However, the welding mounting bracket easily causes the deformation of the box body of the battery box, so that the deviation of the size of the box body and the mounting hole site is generated, the structural strength of the battery box is reduced, and meanwhile, in the running process of the vehicle, the shaking of the vehicle frame easily causes stress concentration and fatigue crack generation of a connecting point due to the rigid contact of the box cover and the vehicle frame, so that the breakage is caused.

The above-mentioned circumstances lead to the structural strength and the stability of battery box lower, influence the life of battery box.

It can be appreciated that, in the battery case 100 provided in this embodiment, the first rod-shaped object 141 and the second rod-shaped object 142 are fixed on the bottom wall of the accommodating cavity 131 of the case 130 through the adhesive layer, that is, the mounting bracket 140 is fixed on the bottom wall of the accommodating cavity 131 in an adhesive manner, compared with the existing welding manner, the case 130 is not easy to deform, the mounting error is small, and the structural strength is high. Meanwhile, the box body 130 is made of metal plates in an integrated mode, the structural strength is high, the buffer layer 110 is arranged on one side, deviating from the box body 130, of the box cover 120, when the box cover 120 is fixed with the frame, the buffer layer 110 can prevent the box cover 120 from being in rigid contact with the frame, the buffer effect is achieved, and the structural stability of the battery box 100 is improved. Through the design, the service life of the battery pack can be prolonged, and the product competitiveness is improved.

Referring to fig. 2 to 5, in one embodiment, a first annular connecting portion 123 is disposed on a side of the case cover 120 adjacent to the case 130, a second annular connecting portion 133 is disposed on an edge of the opening 132, the second annular connecting portion 133 has a peak surface 1331 and a trough surface 1332, the peak surface 1331 and the trough surface 1332 are alternately disposed, the peak surface 1331 is in surface contact with the first annular connecting portion 123, and the trough surface 1332 is fixedly connected with the first annular connecting portion 123 through a threaded fastener.

Illustratively, the threaded fastener may be: screw, bolt, and the like.

As shown in fig. 5, the first annular connecting portion 123 may be provided with an assembling hole 1231, and a screw of the threaded fastener is inserted into the assembling hole 1231 and is in threaded connection with the trough surface 1332.

When the case 130 and the case cover 120 are assembled, the first annular connection portion 123 is brought into contact with the peak surface 1331, and then the first annular connection portion 123 is fixedly connected with the trough surface 1332 using a screw fastener.

It will be appreciated that, after the installation, the peak surface 1331 plays a role of supporting the first annular connecting portion 123, and the trough surface 1332 has a tendency to move along a direction away from the first annular connecting portion 123 under the support of the peak surface 1331, so that the peak surface 1331 can be elastically attached to the threaded fastener, the risk of loosening the screw of the threaded fastener is reduced, and the connection strength between the case cover 120 and the case body 130 is increased, so that the service life of the battery case 100 is prolonged.

For the above embodiment, rivets may be used to replace threaded fasteners for the fixed connection between the cover 120 and the housing 130.

As shown in fig. 4, in one embodiment, the case 130 includes a bottom plate 134 and a shroud 135, the shroud 135 is enclosed around the bottom plate 134 and connected to the bottom plate 134 to define a receiving cavity 131 and an opening 132, and a portion of an outer wall of the shroud 135 is recessed toward the receiving cavity 131 to form a first groove 1351.

In this embodiment, by the arrangement of the first groove 1351, the bending resistance and the deformation resistance of the coaming 135 can be enhanced, so that the structural strength of the case 130 is improved, and the service life is prolonged.

With continued reference to fig. 4, further, the first groove 1351 has a first groove wall 13511 and a second groove wall 13512, and the first groove wall 13511 and the second groove wall 13512 are disposed in an "eight" shape to further enhance the bending resistance and deformation resistance of the shroud 135.

As shown in fig. 1 and 4, in a specific embodiment, the shroud 135 is provided with an opening 1352 that communicates with the accommodating cavity 131, and the opening 1352 is used to pass through electrical connectors such as a wire harness and a connector, so as to facilitate the storage and release of electrical energy by the battery module.

As shown in fig. 3 and 4, of course, the bottom plate 134 may be provided with the groove structure, that is, a portion of the bottom wall of the accommodating cavity 131 is recessed in a direction away from the case cover 120 to form a second groove 1341, and the second shaft 142 is at least partially accommodated in the second groove 1341 and is fixed to a groove wall of the second groove 1341 by an adhesive layer.

It will be appreciated that by providing the second grooves 1341, the bending resistance and deformation resistance of the bottom plate 134 are enhanced, and the structural strength of the case 130 is further improved.

Referring to fig. 2 and 5, in one embodiment, the first rods 141 are centrally disposed on the bottom wall of the accommodating cavity 131 to reduce the center of gravity deviation of the battery case 100 and increase the structural stability of the battery case 100, and the second rods 142 are disposed in a plurality, for example, two, three, four, five, eight, etc., and the plurality of second rods 142 are disposed at intervals along the length direction of the first rods 141, so that each second rod 142 is fixed to the bottom wall of the accommodating cavity 131 through an adhesive layer, and plays a role of reinforcing fastening the case 130, similar to the effect of the reinforcing ribs 1211, thereby improving the structural strength of the battery case 100.

As shown in fig. 6, each of the second shafts 142 is illustratively provided with a mounting hole 1421 to facilitate fixing the battery module to the mounting bracket 140, improving the convenience of installation.

As shown in fig. 1 and 2, in one embodiment, a plurality of reinforcing ribs 1211 are disposed at intervals on a side of the case cover 120 facing away from the case 130, and a buffer layer 110 is disposed between two adjacent reinforcing ribs 1211.

It can be appreciated that, since the reinforcing ribs 1211 have a high structural strength, when the case cover 120 has a deformation tendency, the reinforcing ribs 1211 can absorb deformation stress to resist deformation of the case cover 120, thereby reinforcing the case cover 120 and effectively improving the structural strength of the battery case 100.

In one embodiment, the first shaft 141 and the second shaft 142 may be hollow aluminum profiles.

Illustratively, the specifications of the hollow aluminum profile may be selected from: the hollow aluminum profile belongs to standard components, and the specification of the hollow aluminum profile can be set according to design requirements, wherein the hollow aluminum profile is 50mm multiplied by 50mm, 40mm multiplied by 50mm, 60mm multiplied by 60mm, 60mm multiplied by 50mm and the like.

It can be appreciated that the hollow aluminum profile not only has higher structural strength, but also has a lower density and a lighter weight, and can play a role in reinforcing and fastening the box 130, so that the structural strength of the battery box 100 is improved, the weight of the battery pack is reduced, the energy density is improved, and the cruising time of a vehicle is prolonged.

In one embodiment, the metal plate is an aluminum plate, and the box 130 is formed by integrally stamping the aluminum plate, so that the box 130 has higher structural strength, lighter weight and better heat dissipation performance.

As shown in fig. 5, in one embodiment, the cover 120 includes a top plate 121 and an annular frame 122, the annular frame 122 is connected to an edge of the opening 132, and the top plate 121 is fixed to a side of the annular frame 122 facing away from the case 130.

It can be appreciated that the ring frame 122 can strengthen the fastening function of the top plate 121 to resist the deformation stress of the top plate 121, so as to improve the structural strength of the top plate 121 and prolong the service life of the battery box 100.

In a second aspect, an embodiment of the present utility model further provides a battery pack including a battery module and the battery case 100 of any of the above embodiments, the battery module being fixed to the bottom wall of the housing cavity 131 of the case 130 by the mounting bracket 140.

It can be appreciated that, since the battery pack provided in this embodiment has the battery case 100 in any of the embodiments of the first aspect, the battery case 100 has all the beneficial effects, and the description thereof will not be repeated here.

In a third aspect, embodiments of the present utility model also provide a vehicle including a frame and the battery pack of the above embodiments.

When the battery pack is assembled, in a first step, the mounting bracket 140 is fixed to the bottom wall of the housing chamber 131 of the case 130 by an adhesive layer. In the second step, the battery module is fixed to the mounting bracket 140. In the third step, the cover 120 is coupled to the case 130. Fourth, the case cover 120 is fixedly connected with the frame, and at this time, the buffer layer 110 is attached between the frame and the case cover 120, so as to play a role of buffering.

It can be appreciated that, since the vehicle provided in this embodiment has the battery pack in the above second aspect embodiment, the vehicle has all the beneficial effects of the battery pack, and the description thereof will not be repeated here.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A battery box, comprising:

2. The battery box according to claim 1, wherein a first annular connecting portion is arranged on one side of the box cover, which is close to the box body, and a second annular connecting portion is arranged on the edge of the opening, and the second annular connecting portion is provided with a crest surface and a trough surface;

3. The battery box of claim 1, wherein the box body comprises a bottom plate and a surrounding plate, wherein the surrounding plate surrounds the bottom plate and is connected with the bottom plate to define the accommodating cavity and the opening, and a part of the outer wall of the surrounding plate is recessed towards the accommodating cavity to form a first groove.

4. The battery box according to claim 1, wherein a portion of the bottom wall of the accommodating chamber is recessed in a direction away from the box cover to form a second groove, and the second shaft is at least partially accommodated in the second groove and is fixed to a wall of the second groove by the adhesive layer.

5. The battery box of any one of claims 1 to 4, wherein the first shaft is centrally disposed in the bottom wall of the receiving cavity, the second shaft is provided in plurality, and the plurality of second shafts are spaced apart along the length of the first shaft.

6. The battery box according to any one of claims 1 to 4, wherein a plurality of sections of reinforcing ribs are arranged at intervals on one side of the box cover, which faces away from the box body, and the buffer layer is arranged between two adjacent sections of reinforcing ribs.

7. The battery box of any one of claims 1 to 4, wherein the first shaft and the second shaft are each hollow aluminum profiles.

8. The battery box as claimed in any one of claims 1 to 4, wherein the metal plate is an aluminum plate, and the box body is integrally formed by stamping the aluminum plate.

9. A battery pack comprising the battery case according to any one of claims 1 to 8.

10. A vehicle comprising the battery pack of claim 9.