Battery box and automobile

Abstract

The utility model relates to the technical field of automobiles, in particular to a battery box and an automobile. The battery box comprises a bottom plate, the side beams are arranged on the bottom plate in a surrounding manner and are connected with the bottom plate; cavities are formed in the side beams, and reinforcing structures are arranged in the cavities. The plurality of bottom brackets are distributed on the bottom plate at intervals and are used for supporting battery cells; and the plurality of supporting cross beams are distributed in the battery box at intervals and are used for dividing the battery box into a plurality of cabins. The battery box and the automobile are low in cost, good in protection performance and high in volume utilization rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a battery box and an automobile. BACKGROUND

[0002] In a new energy automobile, a battery box serves as a carrier for arranging battery cells and protects the battery cells. The existing battery box usually adopts an aluminum box body, which absorbs and disperses the force of side collision or extrusion through the cavity of the profile box body, but the overall cost is relatively high. Alternatively, the gap between the battery cells and the side of the box body is controlled to increase the collapse space of the box body, which can also avoid excessive force on the battery cells and protect the battery cells. However, this method compresses the transverse arrangement space of the battery compartment, which is not conducive to improving the volume grouping efficiency of the battery system, reducing the energy of the whole package, and reducing the vehicle endurance. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a battery box and an automobile with low cost, good protection performance, and high volume utilization rate.

[0004] A battery box comprises:

[0005] a bottom plate;

[0006] a side beam surrounding and connected to the bottom plate, the side beam and the bottom plate surrounding to form a box cabin;

[0007] a plurality of bottom supports distributed on the bottom plate;

[0008] a plurality of support cross beams distributed in the box cabin to divide the box cabin into a plurality of compartments;

[0009] wherein the side beam has a cavity, and a reinforcing structure is arranged in the cavity.

[0010] In one embodiment, the side beam is a hollow structure to form the cavity inside the side beam, and the reinforcing structure is arranged along the length direction of the side beam.

[0011] In one embodiment, the reinforcing structure comprises a first reinforcing member and a second reinforcing member, which are arranged in an upper and lower distribution along the height direction of the side beam; the first reinforcing member has two opposite side walls connected to two opposite inner walls of the cavity, and the second reinforcing member has two opposite side walls connected to two opposite inner walls of the cavity.

[0012] In one embodiment, the side wall of the first reinforcing member is welded to the inner wall of the cavity, and the side wall of the second reinforcing member is welded to the inner wall of the cavity.

[0013] In one of the embodiments, the first reinforcing member has a cross section in the shape of a "mouth", and the second reinforcing member has a cross section in the shape of a "U".

[0014] In one of the embodiments, the second reinforcing member has a plurality of notches distributed on the side wall of the second reinforcing member at intervals along the length direction of the second reinforcing member.

[0015] In one of the embodiments, the bottom support is connected to the side beam at both ends, and the middle part of the bottom support is fixedly connected to the bottom plate; and the support cross beam is detachably mounted on the bottom support.

[0016] In one of the embodiments, the side beam is provided with a plurality of lightening holes, and the plurality of lightening holes are distributed at intervals along the length direction of the side beam and are respectively connected to the cavities.

[0017] In one of the embodiments, the lightening holes are arranged on the side of the side beam close to the support cross beam.

[0018] In one of the embodiments, the side of the side beam away from the support cross beam is provided with a positioning pin and a plurality of hanging ears, and the plurality of hanging ears are distributed at intervals along the length direction of the side beam.

[0019] The application also provides an automobile comprising the battery box according to any one of the embodiments.

[0020] Compared with the prior art, the side beam of the battery box is provided with a reinforcing structure, which enhances the strength of the side beam, improves the anti-collision ability and anti-extrusion effect of the side beam, saves the space reserved between the battery cell and the side beam, improves the space utilization rate of the battery box while maintaining good protection performance. The side beam can bear most of the impact and extrusion, and the bottom plate only needs to use relatively simple materials and structures, thereby reducing the overall cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Fig. 1 The battery box structure provided by the application is shown in the figure.

[0023] Fig. 2 The structure of the side beam provided by the application is shown in the figure.

[0024] Fig. 3 The structure of the reinforcing structure provided by the application is shown in the figure.

[0025] Fig. 4 A schematic view of a cross section of a side beam is provided.

[0026] Reference numerals: 10, a floor; 20, a side beam; 21, a cavity; 201, a box cabin; 30, a reinforcing structure; 31, a first reinforcing member; 32, a second reinforcing member; 321, a notch; 40, a bottom support; 50, a support cross beam; 60, a weight-reducing hole; 70, a positioning pin; 80, a hanging lug. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than the one described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when an element is referred to as being "on" or "set on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the specification are used for the purpose of illustration only and do not indicate the only mode of implementation.

[0029] In addition, the terms "first", "second", etc. are used only for the purpose of description and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0030] In the present application, unless otherwise specifically defined and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the application's specification have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. The terminology used in the application's specification is for describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" and "one or more of the listed items" in the application's specification is intended to encompass the items individually or in any combination of one or more of the items.

[0032] The battery box serves as a carrier for the arrangement of the battery cell and also plays a role in protecting the battery safety. As an energy source, the battery cell will have a series of safety problems when subjected to external force or deformation beyond a certain safety threshold. Therefore, when designing the battery system, the external multi-layer structure protection design of the battery cell is comprehensively considered. Based on the possible safety risk problems of the whole vehicle, such as the whole vehicle column collision, in order to reduce the stress or deformation of the battery beyond the safety threshold during the collision process, causing thermal or electrical safety problems, some necessary protection design is made in the gap between the whole vehicle threshold beam, the battery box body or the battery cell and the side of the box. For example, in the design of the battery box body, some new materials are currently mainly used, the thickness of the material is increased, and special support brackets are used to maintain the strength of the box body. The above-mentioned methods have the problems of complex process, many failure risk points, complex mold, high mold opening cost and long cycle, and high cost of single piece.

[0033] Please refer to Figs. 1 to 4 The application provides a battery box, which comprises a bottom plate 10, a side beam 20, a bottom support 40 and a support cross beam 50. The side beam 20 is surrounded on the bottom plate 10 and connected with the bottom plate 10, and the side beam 20 and the bottom plate 10 form a box cabin 201. The bottom support 40 is provided in plurality. The plurality of bottom supports 40 are distributed on the bottom plate 10 at intervals and used for supporting the battery cell. The support cross beam 50 is provided in plurality. The plurality of support cross beams 50 are distributed in the box cabin 201 at intervals and used for separating the box cabin 201 into a plurality of cabin rooms. Among them, the side beam 20 has a cavity 21, and the cavity 21 is provided with a reinforcing structure 30.

[0034] It can be understood that the side beam 20 of the battery box is provided with the reinforcing structure 30, which enhances the strength of the side beam 20, improves the anti-collision ability and anti-extrusion effect of the side beam 20, saves the space of the reserved gap between the battery cell and the side beam 20, improves the space utilization rate of the battery box while maintaining good protection performance. The side beam 20 can withstand most of the impact and extrusion, and the bottom plate 10 can only use relatively simple materials and structures, thereby reducing the overall cost.

[0035] It can be understood that the bottom support 40 is arranged on the bottom plate 10, which can improve the strength of the bottom plate 10 and further improve the compression and impact resistance of the battery box. The plurality of support beams 50 divide the battery box into a plurality of compartments, which can divide different battery compartment areas in the battery box. And the two ends of the support beam 50 are respectively close to the side beam 20, which can further support the side beam 20 and enhance the protection performance. When the battery box is subjected to side impact or Y-direction extrusion, the support beam 50 can also play a supporting role.

[0036] In an embodiment, the side beam 20 is a hollow structure so that the inside of the side beam 20 forms a cavity 21, and the reinforcing structure 30 is arranged along the length direction of the side beam 20. The hollow structure is easier to form and has low material consumption and cost. The reinforcing structure 30 is consistent with the length of the side beam 20, which ensures that the reinforcing structure 30 exists at each position of the side beam 20, and the structural strength is greater.

[0037] Exemplarily, the side beam 20 is formed by rolling and pressing sheet metal to realize internal hollowing. Further, the side beam 20 is arranged in multiple, which is arranged around the bottom plate 10 and connected end to end. The bottom of the side beam 20 is connected with the bottom plate 10, thereby forming a frame type box together with the bottom plate 10.

[0038] Further, the specific number of the bottom support 40 is not specifically limited and can be selected according to actual needs. The specific number of the support beam 50 is not specifically limited and can be selected according to actual needs.

[0039] In an embodiment, the reinforcing structure 30 includes a first reinforcing member 31 and a second reinforcing member 32. Along the height direction of the side beam 20, the first reinforcing member 31 and the second reinforcing member 32 are distributed in an up-down manner. The first reinforcing member 31 has two opposite side walls connected with two opposite inner walls of the cavity 21, and the second reinforcing member 32 has two opposite side walls connected with two opposite inner walls of the cavity 21.

[0040] In this way, the first reinforcing member 31 and the second reinforcing member 32 can be distributed at different positions in the height direction of the side beam 20, and the stress is more dispersed, which is not easy to deform at the same time, and the impact and compression resistance is stronger. And a structure similar to a partition type cavity is formed in the side beam 20, which can greatly improve the structural strength of the side beam 20. Secondly, the first reinforcing member 31 and the second reinforcing member 32 have a certain spacing, which does not easily affect the reinforcing effect of the side beam 20, and effectively reduces the material cost.

[0041] Further, the side wall of the first reinforcing member 31 is welded and fixedly connected with the inner wall of the cavity 21, and the side wall of the second reinforcing member 32 is welded and fixedly connected with the inner wall of the cavity 21.

[0042] Exemplarily, the connection mode between the two side walls of the first reinforcing member 31 and the second reinforcing member 32 and the two inner walls of the cavity 21 is spot welding, which is firmly connected and easy to process. After the spot welding is completed, the side beam 20 is roll-pressed, and the operation is more convenient.

[0043] Preferably, the cross-section of the first reinforcing member 31 is in a "mouth" shape, and the cross-section of the second reinforcing member 32 is in a "U" shape. Both shapes have strong supporting capabilities, relatively less material consumption, simple structures, no complex shapes, and greatly reduce the cost of the mold.

[0044] The cross-section here refers to the section along the height direction of the side beam 20. Of course, in other embodiments, the cross-sections of the first reinforcing member 31 and the second reinforcing member 32 can also be set to other shapes as long as the supporting effect can be satisfied.

[0045] In one embodiment, along the length direction of the second reinforcing member 32, a plurality of gaps 321 are distributed at intervals on the side wall of the second reinforcing member 32. The second reinforcing member 32 is lightened by using the gaps 321, so that the overall structure of the battery box is lighter.

[0046] Exemplarily, the number of the gaps 321 is not specifically limited and can be selected according to actual needs.

[0047] Exemplarily, both the first reinforcing member 31 and the second reinforcing member 32 are sheet metal structures and are formed by roll-pressing or bending.

[0048] In one embodiment, both ends of the bottom bracket 40 are respectively connected to the side beam 20, and the middle part of the bottom bracket 40 is fixedly connected to the bottom plate 10. The support cross beam 50 is detachably mounted on the bottom bracket 40.

[0049] Exemplarily, both the bottom bracket 40 and the support cross beam 50 are strip-shaped sheet metal parts. The bottom bracket 40 is detachably connected to the bottom plate 10 by screws. Both ends of the bottom bracket 40 are welded or detachably connected to the side beam 20 by screws.

[0050] Exemplarily, the support cross beam 50 is connected to the bottom bracket 40 by screws and can be detached relative to the bottom bracket 40. Both ends of the support cross beam 50 are welded or connected to the side beam 20 by screws.

[0051] Furthermore, a plurality of weight-reducing holes 60 are provided on the side beam 20. The plurality of weight-reducing holes 60 are distributed at intervals along the length direction of the side beam 20, and the plurality of weight-reducing holes 60 are respectively communicated with the cavity 21.

[0052] In this way, the weight of the side beam 20 can be reduced, and the weight of the entire battery box can be reduced.

[0053] Further, a weight-reducing hole 60 is arranged on the side of the side beam 20 close to the support cross beam 50. Exemplarily, the weight-reducing hole 60 is arranged on the side wall of the side beam 20 corresponding to the side of the inner side of the battery box, and only communicates with the cavity 21 without penetrating to the other side wall, so that the side beam 20 can maintain the structural strength, and the weight reduction of the whole battery box is realized without affecting the structural strength.

[0054] Further, the side of the side beam 20 away from the support cross beam 50 is provided with a positioning pin 70 and a plurality of hanging ears 80, and the plurality of hanging ears 80 are distributed along the length direction of the side beam 20. The positioning pin 70 and the hanging ears 80 are used for positioning and connecting and fixing the battery box body and the whole vehicle.

[0055] The application also provides an automobile comprising the battery box of any one of the above embodiments.

[0056] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0057] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A battery box characterized by, The battery box comprises: a bottom plate (10); side beams (20) arranged on the bottom plate (10) and connected with the bottom plate (10), the side beams (20) and the bottom plate (10) form a box cabin (201); a plurality of bottom supports (40) are arranged on the bottom plate (10) at intervals; a plurality of support cross beams (50) are arranged in the box cabin (201) at intervals, and the box cabin (201) is divided into a plurality of compartments by the support cross beams (50); wherein the side beams (20) have cavities (21) therein, and the cavities (21) are provided with reinforcing structures (30).

2. The battery pack of claim 1, wherein, The side beams (20) are hollow structures, so that the cavities (21) are formed inside the side beams (20), and the reinforcing structures (30) are arranged along the length direction of the side beams (20).

3. The battery pack of claim 1, wherein, The reinforcing structures (30) comprise first reinforcing members (31) and second reinforcing members (32), which are arranged in an upper and lower relationship along the height direction of the side beams (20); the first reinforcing members (31) have two opposite side walls connected with two opposite inner walls of the cavities (21), respectively; and the second reinforcing members (32) have two opposite side walls connected with two opposite inner walls of the cavities (21), respectively.

4. The battery pack of claim 3, wherein, The side walls of the first reinforcing members (31) are welded to the inner walls of the cavities (21), and the side walls of the second reinforcing members (32) are welded to the inner walls of the cavities (21).

5. The battery pack of claim 3, wherein, The first reinforcing members (31) have a "mouth" shaped cross section, and the second reinforcing members (32) have a "U" shaped cross section.

6. The battery pack of claim 3, wherein, Along the length direction of the second reinforcing members (32), a plurality of notches (321) are arranged on the side walls of the second reinforcing members (32) at intervals.

7. The battery pack of claim 1, wherein, The bottom supports (40) are connected with the side beams (20) at both ends, respectively, and the middle part of the bottom supports (40) is fixedly connected with the bottom plate (10); and the support cross beams (50) are detachably mounted on the bottom supports (40).

8. The battery pack of claim 1, wherein, A plurality of lightening holes (60) are arranged on the side beams (20), and the lightening holes (60) are arranged at intervals along the length direction of the side beams (20) and are connected with the cavities (21), respectively.

9. The battery pack of claim 8, wherein, The lightening holes (60) are arranged on the side of the side beams (20) close to the support cross beams (50); and / or, a positioning pin (70) and a plurality of hanging ears (80) are arranged on the side of the side beams (20) away from the support cross beams (50), and the hanging ears (80) are arranged at intervals along the length direction of the side beams (20).

10. An automobile characterized by comprising: The battery box comprises the battery box according to any one of claims 1-9.

Images