CN216928800U

CN216928800U - Box and battery package

Info

Publication number: CN216928800U
Application number: CN202220245750.5U
Authority: CN
Inventors: 蔡华俭; 程志刚; 花黄伟; 贺月辉; 其他发明人请求不公开姓名
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-07-08
Anticipated expiration: 2032-01-29

Abstract

The utility model discloses a box body and a battery pack, wherein the box body comprises: the box body assembly comprises a bottom plate, side plates and a cross beam, wherein the side plates are connected to the upper surface of the bottom plate, the side plates surround the bottom plate to form a mounting cavity, the cross beam is respectively connected to the side plates so that the mounting cavity is divided into a plurality of sub-mounting cavities, and two connecting angular positions are respectively formed between each end of the cross beam and the side plates; the reinforcing piece is arranged at each connecting angle position and comprises two connecting wall portions, two first reinforcing wall portions and two first transition wall portions, one connecting wall portion is connected to the surface of the side plate, the other connecting wall portion is connected to the surface of the cross beam, the first transition wall portions are connected to the two connecting wall portions respectively, the two reinforcing wall portions are connected with each other, the first transition wall portions and the two first reinforcing wall portions define a first reinforcing cavity together, and the cross section of the first reinforcing cavity is triangular. The box body has high strength, can bear the impact of external pressure and is not easy to deform.

Description

Box and battery pack

Technical Field

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

Background

Along with the rise of new forms of energy notion, new forms of energy battery occupies important position in daily life gradually, and among the correlation technique, the battery package includes the box and sets up at the inside battery module of box etc. wherein, the box mainly plays the effect of protection battery module, prevents that the battery package from receiving the damage because external pressure, for example collide with, vibrations, extrusion, impact etc. and lead to the battery module, and then influences the reliability of battery package. Therefore, it is necessary to provide a case having good mechanical strength.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a box body which has the characteristic of high mechanical strength.

The utility model also provides a battery pack with the box body.

According to an embodiment of the first aspect of the utility model, the case comprises: the box body assembly comprises a bottom plate, a plurality of side plates and at least one cross beam, the side plates are connected to the upper surface of the bottom plate, the side plates surround the bottom plate to form a mounting cavity, two ends of the cross beam are respectively connected to a pair of opposite side plates, so that the mounting cavity is divided into a plurality of sub-mounting cavities, and two connecting angular positions are formed between each end of the cross beam and the side plates; a plurality of reinforcing members are arranged at each connecting angular position, each reinforcing member comprises two connecting wall portions, two first reinforcing wall portions and two first transition wall portions, one connecting wall portion is connected to the surface of the side plate, the other connecting wall portion is connected to the surface of the cross beam, two ends of each first transition wall portion are respectively connected to one end, close to each other, of each connecting wall portion, the two first reinforcing wall portions are connected to each other at one end, the other ends of the two first reinforcing wall portions are respectively connected to one ends, close to each other, of the two connecting wall portions, the first transition wall portions and the two first reinforcing wall portions jointly define a first reinforcing cavity, and the cross section of each first reinforcing cavity is triangular.

The box body of the embodiment of the first aspect of the utility model has at least the following beneficial effects: the connection of crossbeam and curb plate can let the box bear horizontal and fore-and-aft ambient pressure to the first chamber of strengthening that forms is injectd to reinforcement self has very high intensity and stability, through the reinforcement to crossbeam and curb plate, the connection of bottom plate, and the reliable stability of first chamber itself of strengthening, the connection of crossbeam and curb plate is further firm and enhancement, therefore, the connection of crossbeam and curb plate is more firm, thus, the intensity of box is high, can bear ambient pressure's impact, and non-deformable.

According to the container body of some embodiments of the present invention, one ends of the two first reinforcing wall portions are connected perpendicularly to each other, and the other ends of the two first reinforcing wall portions are respectively connected perpendicularly to the ends of the two connecting wall portions that are close to each other.

According to the box body of some embodiments of the utility model, the reinforcing part further comprises two second reinforcing wall parts and two second transition wall parts, one end of each of the two second reinforcing wall parts is perpendicularly connected with one end of each of the two connecting wall parts, the two ends of each of the second transition wall parts are respectively connected with one ends of the first reinforcing wall parts and the second reinforcing wall parts, the ends of the first reinforcing wall parts and the ends of the second reinforcing wall parts are far away from the connecting wall parts, and one connecting wall part, one first reinforcing wall part, one second reinforcing wall part and one second transition wall part jointly define a second reinforcing cavity.

According to the tank of some embodiments of the utility model, the length of the second reinforcing wall portion is shorter than the length of the first reinforcing wall portion.

According to some embodiments of the container body of the present invention, a junction of the two connecting wall portions, the two first reinforcing wall portions and the first transition wall portion is rounded.

According to some embodiments of the utility model, the reinforcement member further includes a plurality of third reinforcement wall portions provided to the first reinforcement cavity so that the first reinforcement cavity is divided into a plurality of sub first reinforcement cavities.

According to the cabinet of some embodiments of the present invention, the reinforcement further includes a plurality of fourth reinforcement wall portions provided to the second reinforcement cavity so that the second reinforcement cavity is divided into a plurality of sub second reinforcement cavities.

According to some embodiments of the utility model, the reinforcement is a profile extruded from an aluminium alloy.

According to the tank of some embodiments of the utility model, each of the reinforcing members has a height not greater than heights of both ends of the cross member.

A battery pack according to an embodiment of the second aspect of the utility model includes: the case according to the embodiment of the first aspect described above; and the battery module is arranged in each sub-installation cavity.

According to the battery pack of the embodiment of the second aspect of the utility model, at least the following beneficial effects are achieved: because the box has good mechanical strength, shock-resistant and difficult deformation to battery module wherein is not fragile, the reliability of battery package is high.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic view of a case assembly of a case of an embodiment of the utility model;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic view of a stiffener in a case assembly of the case of an embodiment of the present invention;

FIG. 4 is a schematic view of another embodiment of a stiffener in a case assembly of a case according to an embodiment of the present invention

FIG. 5 is a schematic view of the upper shell of the housing assembly of the housing of an embodiment of the present invention;

fig. 6 is a schematic diagram of a battery pack according to an embodiment of the utility model.

Reference numerals:

the battery pack includes a bottom plate 100, a side plate 200, a cross member 300, a connection corner 400, a reinforcement 500, a connection wall 510, a first transition wall 520, a second transition wall 530, a first reinforcement wall 540, a second reinforcement wall 550, a third reinforcement wall 560, a fourth reinforcement wall 570, an upper case 600, and a battery pack 700.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present numbers, and larger, smaller, inner, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

With the rise of new energy concepts, new energy batteries gradually occupy an important position in daily life, in the related art, the battery pack 700 includes a box body and battery modules and the like arranged inside the box body, wherein the box body mainly plays a role in protecting the battery modules, and prevents the battery modules from being damaged due to external pressure, such as collision, vibration, extrusion, impact and the like, so that the reliability of the battery pack 700 is affected, and in order to ensure that the strength of the box body is high, the box body can resist the impact of the external pressure, so that the reliability of the battery pack 700 is not affected, the inventors of the present invention propose the following box body and battery pack 700.

Referring to fig. 1 and 2, in some embodiments, a case includes: the box body assembly comprises a bottom plate 100, a plurality of side plates 200 and at least one cross beam 300, wherein the side plates 200 are connected to the upper surface of the bottom plate 100, the side plates 200 form a mounting cavity around the bottom plate 100, two ends of the cross beam 300 are respectively connected to a pair of opposite side plates 200, so that the mounting cavity is divided into a plurality of sub-mounting cavities, and two connecting angular positions 400 are respectively formed between each end of the cross beam 300 and the side plates 200; a plurality of reinforcing members 500 are provided at each connecting angular position 400, each reinforcing member 500 includes two connecting wall portions 510, two first reinforcing wall portions 540, and two first transition wall portions 520, one connecting wall portion 510 is connected to the surface of the side panel 200, the other connecting wall portion 510 is connected to the surface of the cross member 300, both ends of the first transition wall portion 520 are respectively connected to the ends of the two connecting wall portions 510 that are close to each other, the first reinforcing wall portions 540 have two, one ends of the two first reinforcing wall portions 540 are connected to each other, the other ends of the two first reinforcing wall portions 540 are respectively connected to the ends of the two connecting wall portions 510 that are close to each other, the first transition wall portions 520 and the two first reinforcing wall portions 540 jointly define a first reinforcing cavity, and the cross section of the first reinforcing cavity has a triangular shape.

The case of the present embodiment can be connected to the upper surface of the bottom plate 100 through a plurality of side plates 200, thereby forming a mounting cavity around the bottom plate 100, wherein both ends of at least one cross beam 300 are respectively connected to a pair of opposite side plates 200, so that the mounting cavity is divided into a plurality of sub-mounting cavities, and two connecting angular positions 400 are respectively formed between each end of the cross beam 300 and the side plates 200, wherein the connection of the cross beam 300 and the side plates 200 can allow the case to bear lateral and longitudinal external pressure, and the reinforcement 500 defines a first reinforcing cavity with high strength and stability by itself, the connection of the cross beam 300, the side plates 200 and the bottom plate 100 through the two connecting wall portions 510 of the reinforcement 500 can extend the pressure borne by both the cross beam 300 and the side plates 200 to the reinforcement 500, and the reinforcement 500 can indirectly bear the pressure borne by the cross beam 300 and the side plates 200 between the reliable stability of the first reinforcing cavity itself, therefore, the connection between the cross beam 300 and the side plate 200 is further stabilized and reinforced, and thus, the connection between the cross beam 300 and the side plate 200 is more secured, so that the cabinet has high strength, can withstand the impact of external pressure, and is not easily deformed.

Specifically, in some embodiments, the cross-section of the first reinforcement cavity is triangular in shape. For example, the cross section of the first reinforcement cavity is triangular, which is not strictly triangular, but only approximately triangular, for example, approximately right-angled triangular, and particularly, the structural stability of the triangle is good, the cross section of the first reinforcement cavity in this embodiment is triangular only by taking the stability of the triangular structure as a reference, and particularly, the cross section of the first reinforcement cavity is triangular, the connection position of the triangle can be changed appropriately according to the actual situation, as long as the first reinforcement cavity still has good stability, so that the reinforcement 500 itself defines the first reinforcement cavity with high strength and stability, and the pressure applied to both the cross beam 300 and the side plate 200, and the bottom plate 100 by the two connecting wall portions 510 of the reinforcement 500 extends to the reinforcement 500, meanwhile, between the reliability and stability of the first reinforcing cavity, the reinforcing member 500 can indirectly bear the pressure applied to the cross beam 300 and the side plate 200, so that the connection between the cross beam 300 and the side plate 200 is further stabilized and reinforced, and therefore, the connection between the cross beam 300 and the side plate 200 is more reliable, so that the box body has high strength, can bear the impact of external pressure, and is not easy to deform.

Referring to fig. 3, in some embodiments, one ends of the two first reinforcing wall portions 540 are perpendicularly connected to each other, and the other ends of the two first reinforcing wall portions 540 are perpendicularly connected to the ends of the two connecting wall portions 510, which are close to each other, respectively. For example, one end of each of the two first reinforcing wall portions 540 is perpendicularly connected to each other, and the other end of each of the two first reinforcing wall portions 540 is perpendicularly connected to the end of each of the two connecting wall portions 510, which are close to each other, so that the cross section of the first reinforcing cavity may have a right triangle shape, which has good stability, and thus the reinforcing member 500 itself defines the first reinforcing cavity having high strength and stability, and the pressure applied to both the cross member 300 and the side plate 200 may extend to the reinforcing member 500 by the connection of the two connecting wall portions 510 of the reinforcing member 500 to the cross member 300, the side plate 200, and the bottom plate 100, while interposing the reliable stability of the first reinforcing cavity itself, the reinforcing member 500 may indirectly bear the pressure applied to the cross member 300 and the side plate 200, so that the connection between the cross member 300 and the side plate 200 is further stabilized and reinforced, and thus, crossbeam 300 and curb plate 200's connection is more firm, so, the intensity of box is high, can bear ambient pressure's impact, and non-deformable.

Specifically, the bottom plate 100 and the side plate 200 are extruded from an aluminum alloy profile having high strength and low weight, so that the case made of the aluminum alloy profile is suitable for a lightweight battery pack 700, an electric vehicle, and the like.

Specifically, a plurality of crossbeams 300 are connected in curb plate 200, for example, curb plate 200 is connected to three crossbeam 300, with this, the installation cavity has formed four sub-installation chambeies, therefore, in space as far as possible, four battery module of follow-up box installation, therefore battery package 700 can have when fine use and reliability, equally, curb plate 200 is connected to three crossbeam 300, adopt twelve reinforcement 500 to set up in connecting angular position 400, with this intensity of strengthening the box, so, the box has very high intensity, can bear external impact, and non-deformable.

More specifically, the plurality of side plates 200 are welded to the upper surface of the bottom plate 100, two ends of at least one cross beam 300 are respectively welded to a pair of opposite side plates 200, the reinforcing member 500 includes two connecting wall portions 510, one of the connecting wall portions 510 is welded to the surface of the side plate 200, and the other connecting wall portion 510 is welded to the surface of the cross beam 300, wherein the welding process is convenient, and the structural strength is high, and thus, the strength between the side plate 200 and the bottom plate 100 through welding is high, and the strength between the reinforcing member 500, the cross beam 300 and the side plate 200 through welding is high, so that the box body has high strength, can bear external impact, and is not easy to deform.

Although the above description is given by taking the example of the welding connection among the side plates 200, the cross beam 300 and the reinforcing member 500, the utility model is not limited thereto, and other connection modes, such as riveting, bolt connection and the like, can be selected according to actual situations, and are not described in detail herein.

Referring to fig. 3, in some embodiments, the reinforcement member 500 further includes two second reinforcement wall portions 550 and two second transition wall portions 530, one end of each of the two second reinforcement wall portions 550 is perpendicularly connected to one end of each of the two connection wall portions 510, the two ends of each of the second transition wall portions 530 are connected to one end of each of the first reinforcement wall portions 540 and the second reinforcement wall portions 550, which are away from the connection wall portions 510, and one of the connection wall portions 510, one of the first reinforcement wall portions 540, one of the second reinforcement wall portions 550, and one of the second transition wall portions 530 collectively define a second reinforcement cavity. For example, one connecting wall portion 510, one first reinforcing wall portion 540, one second reinforcing wall portion 550, and one second transition wall portion 530 collectively define a second reinforcing cavity, specifically, the second reinforcing cavity includes the connecting wall portion 510 and the second reinforcing wall portion 550 that are perpendicular to each other, and more specifically, in order to prevent a situation where stress is excessively concentrated at the connection of the connecting wall portion 510 of the reinforcing member 500 with the cross member 300 and the side plate 200, therefore, the two second reinforcing wall portions 550 are perpendicular to the two connecting wall portions 510, and specifically, the two second reinforcing wall portions 550 are not necessarily perpendicular to the two connecting wall portions 510 as long as a situation where stress is excessively concentrated at the connection of the connecting wall portion 510 of the reinforcing member 500 with the cross member 300 and the side plate 200 is avoided.

Further, in some embodiments, the length of the second reinforced wall portion 550 is shorter than the length of the first reinforced wall portion 540. For example, the length between the second reinforcing wall portion 550 is shorter than the length of the first reinforcing wall portion 540, and the second reinforcing wall portion 550 and the connecting wall portion 510 are perpendicular to each other, so that the cross section of the second reinforcing cavity has a right trapezoid shape, it should be noted that the right trapezoid shape is not a right trapezoid in a strict sense, but is only an approximate right trapezoid shape, and according to the actual needs, the shape of the second reinforcing cavity can be modified in some adaptability as long as the second reinforcing cavity can avoid too much stress concentration, and has good stability.

Specifically, the first reinforcement cavity of the reinforcement 500 is connected with the second reinforcement cavity, and thus the second reinforcement cavity can share the pressure from the first reinforcement cavity, and thus the first reinforcement cavity and the second reinforcement cavity defined by the reinforcement 500 themselves have high strength and stability, and through the connection of the two connecting wall portions 510 of the reinforcement 500 to the cross beam 300, the side plate 200 and the bottom plate 100, the pressure applied to both the cross beam 300 and the side plate 200 can extend to the reinforcement 500, and simultaneously through the reliable stability of the first reinforcement cavity and the second reinforcement cavity themselves, the reinforcement 500 can indirectly bear the pressure applied to the cross beam 300 and the side plate 200, and therefore, the connection of the cross beam 300 and the side plate 200 is further stabilized and reinforced, and thus, the connection of the cross beam 300 and the side plate 200 is more stabilized, and thus, the strength of the box body is high, and can bear the impact of the external pressure, and is not easy to deform.

Specifically, second transition wall portion 530 is provided with the sunken of buckling downwards along the upper surface, thus, through buckling the back, certain space can be practiced thrift to reinforcement 500, in-process at subsequent box equipment battery module, the battery module has more accommodation space, thus, reinforcement 500 not only makes things convenient for in the installation of battery module on the one hand, save certain space, increase battery module or all the other parts, make battery package 700 reliability strengthen, on the other hand reinforcement 500 can have very high intensity, can stabilize crossbeam 300 and curb plate 200's connection, thus, the box has very high intensity, can bear external impact, and non-deformable.

Referring to fig. 3, in some embodiments, the junction of the two connecting wall portions 510, the two first reinforcing wall portions 540, and the first transition wall portion 520 are rounded. For example, in the connection of the two connecting wall portions 510 of the reinforcement 500 to the cross beam 300, the side plate 200, and the bottom plate 100, the pressure applied to both the cross beam 300 and the side plate 200 may extend to the reinforcement 500, and therefore, in order to avoid the stress concentration at the connection of the two connecting wall portions 510, the two first reinforcing wall portions 540, and the first transition wall portion 520, the fillet may be provided at the connection.

Referring to fig. 4, in some embodiments, the stiffener 500 further includes a plurality of third stiffener wall portions 560, the plurality of third stiffener wall portions 560 being disposed in the first stiffener cavity such that the first stiffener cavity is divided into a plurality of sub-first stiffener cavities. For example, by providing the plurality of third reinforced wall portions 560, the plurality of sub first reinforced cavities can share the pressure applied to the first reinforced cavity, and thus, the reinforcing member 500 can have high strength, and can stabilize the connection between the cross beam 300 and the side plate 200, so that the box body has high strength, can bear external impact, and is not easily deformed.

Referring to fig. 4, in some embodiments, the reinforcement member 500 further includes a plurality of fourth reinforcement wall portions 570, the plurality of fourth reinforcement wall portions 570 being disposed in the second reinforcement cavity such that the second reinforcement cavity is divided into a plurality of sub-second reinforcement cavities. For example, by providing the plurality of fourth reinforcing wall portions 570, the plurality of sub second reinforcing cavities can share the pressure applied to the second reinforcing cavities, so that the reinforcing member 500 has high strength, and the connection between the cross beam 300 and the side plate 200 can be stabilized, and thus, the box body has high strength, can bear the external impact, and is not easily deformed.

Referring to fig. 3, in some embodiments, the stiffener 500 is a profile extruded from an aluminum alloy. For example, aluminum alloy has high strength and low weight, and thus the reinforcement 500 made of an aluminum alloy profile is suitable for a light-weight case, a battery pack 700, an electric vehicle, and the like.

Referring to fig. 2, in some embodiments, the height of each stiffener 500 is no greater than the height of both ends of the beam 300. For example, the height of the reinforcement 500 is lower than the height of the two ends of the cross beam 300, so that when the reinforcement 500 is welded to the cross beam 300 and the side plate 200, specifically, when the reinforcement 500 is welded to the cross beam 300, the height between the reinforcement 500 and the two ends of the cross beam 300 is lower, and therefore, a certain free space is above the reinforcement 500, which is convenient for a worker to weld and connect the reinforcement.

Referring to fig. 5, in particular, the case assembly further includes an upper case 600, and the upper case 600 is coupled to the side plates 200 and the cross member 300. For example, threaded holes and screws which can be connected correspondingly to each other are formed in the upper casing 600, the side plate 200 and the cross beam 300, so that the upper casing 600 is bolted to the side plate 200 and the cross beam 300, and the bolted connection facilitates workers to install and disassemble the box body, and therefore, the box body is convenient to assemble and use.

Referring to fig. 6, in some embodiments, a battery pack 700 includes: the case in some of the above embodiments; and the battery module is arranged in each sub-installation cavity. For example, the battery modules in the battery pack 700 are disposed in the sub-mounting cavities, and the battery modules are connected to the bottom plate 100 and the side plates 200, so that the battery modules are fixed, wherein the case has high strength and can bear the impact of external pressure, and therefore, the case has good mechanical strength, is impact-resistant and is not easy to deform, so that the battery modules therein are not easily damaged, and the reliability of the battery pack 700 is high.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims

1. The box, its characterized in that includes:

the box body assembly comprises a bottom plate, a plurality of side plates and at least one cross beam, the side plates are connected to the upper surface of the bottom plate, the side plates surround the bottom plate to form an installation cavity, two ends of the cross beam are connected to a pair of opposite side plates respectively, so that the installation cavity is divided into a plurality of sub-installation cavities, and two connecting angular positions are formed between each end of the cross beam and the side plates respectively;

and the reinforcing parts are arranged at the connecting angular positions and comprise two connecting wall parts, two first reinforcing wall parts and two first transition wall parts, one connecting wall part is connected to the surface of the side plate, the other connecting wall part is connected to the surface of the cross beam, two ends of each first transition wall part are respectively connected to one end, close to each other, of each connecting wall part, the two first reinforcing wall parts are connected with each other at one end, the other ends of the two first reinforcing wall parts are respectively connected with one end, close to each other, of each connecting wall part, the first transition wall parts and the two first reinforcing wall parts jointly define a first reinforcing cavity, and the cross section of each first reinforcing cavity is triangular.

2. A cabinet according to claim 1, wherein one ends of the two first reinforcing wall portions are vertically connected to each other, and the other ends of the two first reinforcing wall portions are vertically connected to one ends of the two connecting wall portions which are close to each other, respectively.

3. A cabinet according to claim 1, wherein the reinforcing member further includes two second reinforcing wall portions and two second transition wall portions, one end of each of the two second reinforcing wall portions is perpendicularly connected to one end of each of the two connecting wall portions, the ends of each of the second transition wall portions are connected to one ends of the first reinforcing wall portion and the second reinforcing wall portion, the ends of the first reinforcing wall portion and the second reinforcing wall portion being remote from the connecting wall portion, and one of the connecting wall portions, one of the first reinforcing wall portions, one of the second reinforcing wall portions, and one of the second transition wall portions define a second reinforcing cavity.

4. A cabinet as claimed in claim 3, wherein the second reinforcing wall portion has a length shorter than that of the first reinforcing wall portion.

5. A cabinet according to claim 1, wherein the junctions of the two connecting wall portions, the two first reinforcing wall portions and the first transition wall portion are rounded.

6. A cabinet as claimed in claim 1, wherein the reinforcement member further includes a plurality of third reinforcement wall portions provided to the first reinforcement cavity so that the first reinforcement cavity is divided into a plurality of sub first reinforcement cavities.

7. A cabinet as claimed in claim 3, wherein the reinforcement member further includes a plurality of fourth reinforcing wall portions provided to the second reinforcing cavity so that the second reinforcing cavity is divided into a plurality of sub-second reinforcing cavities.

8. A cabinet as claimed in claim 1, wherein the reinforcing member is a profile extruded from an aluminum alloy.

9. A tank according to claim 1, wherein the height of each of the reinforcing members is not greater than the height of both ends of the cross member.

10. A battery pack, comprising:

the case according to any one of claims 1 to 9;

and the battery module is arranged in each sub-installation cavity.