Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises a box cover assembly and a lower box body assembly, the lower box body assembly is connected to the bottom of the box cover assembly to jointly define a module space, the lower box body assembly comprises an external box body and an internal cross beam, and the internal cross beam is installed in the external box body; the battery module is installed in the module space, the battery module is supported on the internal cross beam, and the internal cross beam and the external box body are both connected with a vehicle body. According to the battery pack provided by the embodiment of the utility model, the battery module can be mounted and protected together by arranging the box cover assembly and the lower box body assembly, so that the possibility that the battery module is damaged under the action of external force can be reduced, and meanwhile, the battery pack is mounted on a vehicle by connecting the lower box body assembly with the vehicle body; and the structural strength of the battery pack can be enhanced, and the possibility of deformation or damage of the battery pack under the action of external force is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a battery pack and a vehicle with the battery pack. Background Art

[0002] With the increasingly serious energy and environmental problems, new energy vehicles have become the development direction of the automotive industry. As one of the important components of new energy vehicles, the battery pack provides power for the vehicle, and the safety of the battery pack is directly related to the safety and overall vehicle performance of the vehicle. During the driving process of an electric vehicle, collisions are inevitable. To reduce the possibility of damage and failure of the battery pack when the vehicle collides, it is necessary to enhance the structural strength of the battery pack, and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery pack, which can reduce the possibility of damage to the battery module under external force, and can enhance the structural strength of the battery pack, reducing the possibility of deformation or damage of the battery pack under external force.

[0004] The battery pack according to an embodiment of the utility model includes: a box cover assembly and a lower box body assembly. The lower box body assembly is connected to the bottom of the box cover assembly to jointly define a module space. The lower box body assembly includes an external box body and an internal cross beam. The internal cross beam is installed inside the external box body; a battery module, which is installed in the module space, supported by the internal cross beam, and both the internal cross beam and the external box body are connected to the vehicle body.

[0005] The battery pack according to an embodiment of the utility model can jointly install and protect the battery module by setting the box cover assembly and the lower box body assembly, reducing the possibility of damage to the battery module under external force. At the same time, by connecting the lower box body assembly to the vehicle body, the installation of the battery pack on the vehicle can be realized, and the structural strength of the battery pack can be enhanced, reducing the possibility of deformation or damage of the battery pack under external force.

[0006] In the battery pack according to some embodiments of the utility model, the external box body includes an annular frame and a bottom plate. The bottom plate is connected to the bottom of the annular frame and jointly defines an installation sink. The internal cross beam is installed in the installation sink, and the internal cross beam is connected to the vehicle body through a first connecting piece passing through the bottom plate, and the annular frame is connected to the vehicle body through a second connecting piece.

[0007] In the battery pack according to some embodiments of the utility model, the box cover assembly is provided with a through hole, and the first connecting piece also passes through the through hole and is connected to the box cover assembly.

[0008] According to the battery pack of some embodiments of the present invention, a support sleeve is provided between the box cover assembly and the internal cross beam, and the support sleeve is sleeved outside the first connecting member.

[0009] According to the battery pack of some embodiments of the utility model, the internal crossbeam includes an end sub-crossbeam and a plurality of middle sub-crossbeams, the end sub-crossbeam is distributed and spaced apart from the plurality of middle sub-crossbeams, and the end sub-crossbeam is connected to the inner end surface of the annular frame; wherein the end sub-crossbeam and the middle sub-crossbeam are both provided with a mounting portion for mounting the battery module, and the middle sub-crossbeam is provided with a first connecting hole for passing the first connecting member.

[0010] According to the battery pack of some embodiments of the present invention, there are multiple battery modules; the two ends of one of the battery modules are respectively connected to the end sub-crossbeams and one of the middle sub-crossbeams, and the two ends of the remaining battery modules are respectively connected to two adjacent middle sub-crossbeams.

[0011] According to the battery pack of some embodiments of the present invention, the plurality of battery modules are distributed at intervals, and an escape space for evading the first connecting member is formed between two adjacent battery modules.

[0012] According to the battery pack of some embodiments of the present invention, the plurality of battery modules are spaced apart and distributed along a first direction, and each of the battery modules is spaced apart from the annular frame along a second direction to form a buffer space, and the first direction intersects with the second direction.

[0013] According to the battery pack of some embodiments of the present invention, the bottom of the annular frame is provided with an embedding groove open inwardly, the end of the bottom plate extends into the embedding groove, and the bottom surface of the bottom plate is flush with the bottom surface of the annular frame.

[0014] The utility model also provides a vehicle.

[0015] A vehicle according to an embodiment of the utility model is provided with a battery pack as described in any one of the above embodiments.

[0016] The advantages of the vehicle and the above-mentioned battery pack over the prior art are the same and will not be elaborated here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model Figure 1 ;

[0020] Figure 2 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model Figure 2 ;

[0021] Figure 3 is an exploded view of a battery pack according to an embodiment of the present utility model;

[0022] Figure 4 is a schematic partial structural diagram of a battery pack according to an embodiment of the present utility model;

[0023] Figure 5 is a schematic partial exploded view of a battery pack according to an embodiment of the present utility model;

[0024] Figure 6 is a schematic structural diagram of a lower box body assembly of a battery pack according to an embodiment of the present utility model;

[0025] Figure 7 is a bottom view of a lower box body assembly of a battery pack according to an embodiment of the present utility model;

[0026] Figure 8 is an exploded view of a lower box body assembly of a battery pack according to an embodiment of the present utility model;

[0027] Figure 9 is a partial cross-sectional view of a battery pack according to an embodiment of the present utility model.

[0028] Reference numerals:

[0029] Battery pack 100,

[0030] Cover assembly 1, battery module 2, avoidance space 21, buffer space 22,

[0031] Lower box body assembly 3, external box body 31, annular frame 311, second connection hole 3111, bottom plate 312, embedding groove 3121, installation sink 313, internal cross beam 32, end sub-cross beam 321, middle sub-cross beam 322, installation part 323, support sleeve 324, reinforcement plate 325, first connecting member 326. Detailed description of the specific implementation mode

[0032] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0036] The following refers to Figures 1-9 Describe the battery pack 100 according to an embodiment of the present utility model. By providing the lid assembly 1 and the lower box body assembly 3, the battery module 2 can be installed and protected together, which can reduce the possibility of damage to the battery module 2 under external forces. At the same time, by connecting the lower box body assembly 3 to the vehicle body, the installation of the battery pack 100 on the vehicle can be realized, and the structural strength of the battery pack 100 can be enhanced, reducing the possibility of deformation or damage to the battery pack 100 under external forces.

[0037] As Figures 1-3 shown, the battery pack 100 according to an embodiment of the present utility model includes: a lid assembly 1, a lower box body assembly 3, and a battery module 2.

[0038] The lower box body assembly 3 is connected to the bottom of the lid assembly 1 to jointly define a module space. The lower box body assembly 3 includes an outer box body 31 and an inner cross beam 32, and the inner cross beam 32 is installed inside the outer box body 31.

[0039] Specifically, the module space is used to provide an installation space for the battery module 2. That is, the battery module 2 can be arranged within the module space, and the lower box body assembly 3 is connected to the bottom of the box cover assembly 1. Then, the box cover assembly 1 can be used to shield and protect the battery module 2 from above, and the lower box body assembly 3 can be used to support and protect the battery module 2 from below, so as to reduce the possibility of damage to the battery module 2 under external forces.

[0040] Among them, the lower box body assembly 3 includes two parts, namely the outer box body 31 and the inner cross beam 32. The outer box body 31 is used to protect the battery module 2, and the inner cross beam 32 is used to support the battery module 2. And by installing the inner cross beam 32 within the outer box body 31, the inner cross beam 32 can be connected to the outer box body 31, so as to improve the overall stiffness of the lower box body assembly 3 and reduce the possibility of deformation under external forces.

[0041] The battery module 2 is installed within the module space, the battery module 2 is supported by the inner cross beam 32, and both the inner cross beam 32 and the outer box body 31 are connected to the vehicle body.

[0042] Specifically, the battery module 2 is used to provide power for the vehicle. By arranging the battery module 2 within the module space, the box cover assembly 1 and the lower box body assembly 3 can jointly protect the battery module 2, so as to reduce the possibility of damage to the battery module 2 under external forces. At the same time, the inner cross beam 32 is used to support the battery module 2, so the battery module 2 can be arranged on the inner cross beam 32. In addition, by connecting the inner cross beam 32 to the vehicle body, the structural strength of the inner cross beam 32 can be improved, and further the reliability of the inner cross beam 32 to support the battery module 2 can be enhanced. And by connecting the outer box body 31 to the vehicle body as well, the structural strength of the outer box body 31 can be improved, and the possibility of deformation of the outer box body 31 under external forces can be reduced, and further the reliability of protecting the battery module 2 can be enhanced.

[0043] Among them, it should be noted that by connecting both the inner cross beam 32 and the outer box body 31 to the vehicle body, the lower box body assembly 3 can be connected to the vehicle body. And by connecting the lower box body assembly 3 to the bottom of the box cover assembly 1, the battery pack 100 can be connected to the vehicle body, realizing the installation of the battery pack 100 on the vehicle body, and improving the structural strength of the battery pack 100 and reducing the possibility of deformation or damage to the battery pack 100 under external forces.

[0044] Thus, by connecting the box cover assembly 1 and the lower box body assembly 3 to form a module space for installing the battery module 2, and the box cover assembly 1 and the lower box body assembly 3 can be used to protect the battery module 2, so as to reduce the possibility of damage to the battery module 2 under external forces. At the same time, by connecting the lower box body assembly 3 to the vehicle body, the installation of the battery pack 100 on the vehicle can be realized, and the structural strength of the battery pack 100 can be improved.

[0045] According to the battery pack 100 of the embodiment of the present utility model, by providing the cover assembly 1 and the lower box body assembly 3, the battery module 2 can be jointly installed and protected, which can reduce the possibility of damage to the battery module 2 under external forces. At the same time, by connecting the lower box body assembly 3 to the vehicle body, the installation of the battery pack 100 on the vehicle can be realized, and the structural strength of the battery pack 100 can be enhanced, reducing the possibility of deformation or damage to the battery pack 100 under external forces.

[0046] In some embodiments, the external box body 31 includes an annular frame 311 and a bottom plate 312. The bottom plate 312 is connected to the bottom of the annular frame 311 and jointly defines an installation sink 313. The internal cross beam 32 is installed in the installation sink 313. The internal cross beam 32 is connected to the vehicle body through a first connecting member 326 penetrating the bottom plate 312, and the annular frame 311 is connected to the vehicle body through a second connecting member.

[0047] Specifically, connecting the annular frame 311 and the bottom plate 312 can improve the structural strength of the external box body 31, and the two jointly define the installation sink 313. The installation sink 313 is used to provide an installation position for the internal cross beam 32, that is, the internal cross beam 32 can be arranged in the installation sink 313 to reduce the space occupied by the lower box body assembly 3 in the Z direction, and further reduce the space occupied by the battery pack 100 in the Z direction, which is beneficial to the installation of the battery pack 100 on the vehicle. At the same time, by connecting the internal cross beam 32 to the vehicle body through the first connecting member 326 and making the first connecting member 326 penetrate the bottom plate 312, the internal cross beam 32, the bottom plate 312 and the vehicle body can be connected through the first connecting member 326, that is, the lower box body assembly 3 is connected to the vehicle body, which can improve the structural strength of the lower box body assembly 3, and the weight of the battery module 2 can be transmitted to the vehicle body through the lower box body assembly 3, thereby extending the service life of the lower box body assembly 3. In addition, by connecting the annular frame 311 to the vehicle body through the second connecting member, on the basis of connecting the lower box body assembly 3 to the vehicle body through the first connecting member 326, the lower box body assembly 3 can be further connected to the vehicle body through the second connecting member, which can further improve the connection strength between the lower box body assembly 3 and the vehicle body, and effectively improve the structural strength of the lower box body assembly 3, reducing the possibility of deformation and failure of the lower box body assembly 3 under external forces.

[0048] It should be noted that the number of the first connecting member 326 and the second connecting member can be set to be multiple to improve the connection stability and reliability between the lower box body assembly 3 and the vehicle body, and the first connecting member 326 can be configured as a bolt.

[0049] In some embodiments, the cover assembly 1 is provided with a through hole, and the first connecting member 326 also passes through the through hole and is connected to the cover assembly 1.

[0050] Specifically, a through hole is provided on the cover assembly 1. When the internal cross beam 32 is connected to the vehicle body by the first connecting member 326, the first connecting member 326 can also pass through the through hole and be connected to the cover assembly 1. Thus, the first connecting member 326 can be used to connect the lower box body assembly 3, the cover assembly 1 and the vehicle body, realizing the connection between the lower box body assembly 3 and the cover assembly 1, and also realizing the installation of the battery pack 100 on the vehicle.

[0051] It should be noted that the installation position of the through hole and the first connecting member 326 needs to be set opposite to each other, so as to improve the reliability of the connection between the first connecting member 326 and the cover assembly 1 when the internal cross beam 32 is connected to the vehicle body by the first connecting member 326.

[0052] In some embodiments, a support sleeve 324 is provided between the cover assembly 1 and the internal cross beam 32, and the support sleeve 324 is sleeved outside the first connecting member 326.

[0053] Specifically, by arranging the support sleeve 324 between the internal cross beam 32 and the cover assembly 1, the support sleeve 324 can be used to support the cover assembly 1 to ensure the height of the module space, and further ensure the installation space of the battery module 2. And by sleeving the support sleeve 324 outside the first connecting member 326, the support sleeve 324 can be used to limit the through path of the first connecting member 326, that is, the support sleeve 324 can be used to guide the first connecting member 326, so as to improve the reliability of connecting the lower box body assembly 3 and the cover assembly 1 by the first connecting member 326. Moreover, by using the support sleeve 324 to support the cover assembly 1, the support sleeve 324 can bear a part of the pressure from the cover assembly 1, reducing the pressure borne by the first connecting member 326, and thus extending the service life of the first connecting member 326.

[0054] It should be noted that the support sleeve 324 can be extended along the Z direction, with one end pressing against the lower surface of the cover assembly 1 and the other end pressing against the upper surface of the internal cross beam 32, so as to improve the reliability of the support sleeve 324 in supporting the cover assembly 1. And the number of the support sleeves 324 can be set to be multiple, so as to use multiple support sleeves 324 to jointly support the cover assembly 1, improving the stability and reliability of supporting the cover assembly 1. At the same time, multiple support sleeves 324 can jointly bear the pressure of the cover assembly 1, so that the pressure borne by each support sleeve 324 is small, and the service life of the support sleeve 324 can be extended.

[0055] In some embodiments, the internal cross beam 32 includes an end sub-cross beam 321 and a plurality of intermediate sub-cross beams 322. The end sub-cross beam 321 and the plurality of intermediate sub-cross beams 322 are spaced apart, and the end sub-cross beam 321 is connected to the inner end surface of the annular frame 311.

[0056] Specifically, the internal crossbeam 32 includes a plurality of intermediate sub-crossbeams 322. That is, the number of intermediate sub-crossbeams 322 provided can be two, three or more. Both the end sub-crossbeam 321 and the intermediate sub-crossbeams 322 can be used to support the battery module 2. Spacing the end sub-crossbeam 321 and the plurality of intermediate sub-crossbeams 322 apart for distribution can support the battery module 2 from multiple positions simultaneously, so as to improve the stability and reliability of supporting the battery module 2. It can also enable the end sub-crossbeam 321 and the plurality of intermediate sub-crossbeams 322 to jointly bear the pressure from the battery module 2, making the pressure borne by the end sub-crossbeam 321 and each intermediate sub-crossbeam 322 relatively small, thereby extending the service life of the end sub-crossbeam 321 and each intermediate sub-crossbeam 322. Moreover, connecting the end sub-crossbeam 321 to the inner end face of the annular frame 311 can support the annular frame 311 by means of the end sub-crossbeam 321, so as to improve the structural strength of the annular frame 311 and reduce the possibility of its force-induced deformation.

[0057] Exemplarily, as Figure 5 、 Figure 6 and Figure 8 shown, two intermediate sub-crossbeams 322 are provided in the battery pack 100, and the two intermediate sub-crossbeams 322 and the end sub-crossbeam 321 are all arranged in parallel and spaced apart to jointly support the battery module 2. Moreover, the end sub-crossbeam 321 and the intermediate sub-crossbeams 322 are both arranged to extend from one end of the annular frame 311 to the other end to support the annular frame 311 from inside the installation sink 313, so as to improve the structural strength of the annular frame 311 and reduce the possibility of its deformation under external forces. Among them, the number of intermediate sub-crossbeams 322 provided is not limited to that described in this embodiment and can be flexibly set according to specific requirements and space size.

[0058] Among them, both the end sub-crossbeam 321 and the intermediate sub-crossbeams 322 are provided with installation parts 323 for installing the battery module 2, and the intermediate sub-crossbeams 322 are provided with first connection holes for passing through the first connectors 326. That is to say, the battery module 2 can be connected to the end sub-crossbeam 321 and the intermediate sub-crossbeams 322 respectively through the installation parts 323.

[0059] Specifically, an installation portion 323 is provided on the end sub-cross beam 321 to connect the battery module 2 to the end sub-cross beam 321 through the installation portion 323. At the same time, an installation portion 323 is also provided on the intermediate sub-cross beam 322 to connect the battery module 2 to the intermediate sub-cross beam 322 through the installation portion 323. Thus, the connection between the battery module 2 and the internal cross beam 32 can be achieved by setting the installation portion 323, and further, the installation of the battery module 2 inside the battery pack 100 can be realized. Moreover, by connecting the battery module 2 to the internal cross beam 32 through the installation portion 323, the reliability of the internal cross beam 32 in supporting the battery module 2 can be improved, and the battery module 2 can be prevented from moving or shaking inside the battery pack 100, which may cause damage and failure of the battery pack 100. Wherein, the installation portion 323 can be configured as a plurality of mounting holes arranged at equal intervals, and the internal cross beam 32 and the battery module 2 can be connected by passing a connecting member through the mounting holes.

[0060] In such as Figure 5 、 Figure 6 and Figure 8 In the embodiments shown, two first connection holes are arranged at intervals on each intermediate sub-cross beam 322. Thus, the intermediate sub-cross beam 322 and the bottom plate 312 can be respectively connected through the two first connecting members 326 to improve the connection stability and reliability between the two. Correspondingly, two support sleeves 324 are provided on each intermediate sub-cross beam 322, which can effectively improve the reliability of supporting the cover assembly 1 and extend the service life of the first connecting member 326 and the support sleeve 324.

[0061] In addition, it should be noted that the annular frame 311 is provided with second connection holes 3111 for passing through the second connecting member. The second connection holes 3111 are multiple and are distributed at intervals along the circumferential direction of the annular frame 311. Specifically, the second connecting member is used to connect the lower box body assembly 3 to the vehicle body. By providing the second connection holes 3111 on the annular frame 311, the second connecting member can pass through the second connection holes 3111 to be connected to the vehicle body, so that the lower box body assembly 3 can be connected to the vehicle body through the second connecting member. Moreover, since multiple second connection holes 3111 are arranged at intervals in the circumferential direction of the annular frame 311, the lower box body assembly 3 can be connected to the vehicle body at multiple positions through multiple spaced second connecting members, which can effectively improve the connection stability and reliability between the lower box body assembly 3 and the vehicle body, and can prevent the second connecting member from breaking and failing due to stress concentration.

[0062] In some embodiments, there are multiple battery modules 2.

[0063] Specifically, the battery module 2 is used to provide power for the vehicle. By setting multiple battery modules 2, that is, the number of battery modules 2 can be two, three or more, the endurance of the vehicle can be effectively improved.

[0064] Both ends of one of the battery modules 2 are respectively connected to the end sub-cross beam 321 and one of the intermediate sub-cross beams 322, and both ends of the remaining battery modules 2 are respectively connected to two adjacent intermediate sub-cross beams 322. That is, each battery module 2 can be supported at two positions, so as to improve the stability and reliability of the support for each battery module 2, and can also extend the service life of the end sub-cross beam 321 and the intermediate sub-cross beams 322.

[0065] In addition, it should be noted that two adjacent battery modules 2 can share one intermediate sub-cross beam 322 between the two battery modules 2, which can reduce the number of intermediate sub-cross beams 322, lower the installation cost, reduce the overall weight of the battery pack 100, and meet the lightweight requirement of the battery pack 100.

[0066] In some embodiments, a plurality of battery modules 2 are spaced apart, and an avoidance space 21 for avoiding the first connecting member 326 is formed between two adjacent battery modules 2.

[0067] Specifically, by spacing apart a plurality of battery modules 2, each battery module 2 can be independent of each other to avoid interference. That is, when one of the battery modules 2 is damaged and fails, the remaining battery modules 2 can still provide power for the vehicle. At the same time, an avoidance space 21 is formed between two adjacent battery modules 2, and the avoidance space 21 is used to avoid the installation position of the first connecting member 326, so that the battery module 2 and the first connecting member 326 can be spaced apart, and the installation of the battery module 2 will not affect the setting of the first connecting member 326, and thus will not affect the connection between the lower box body assembly 3 and the box cover assembly 1, and the battery module 2 can be installed without being affected by the setting of the first connecting member 326.

[0068] In some embodiments, a plurality of battery modules 2 are spaced apart along a first direction, and each battery module 2 is spaced apart from the annular frame 311 along a second direction to form a buffer space 22, and the first direction intersects the second direction.

[0069] Specifically, multiple battery modules 2 are connected to the internal cross beam 32, that is, multiple battery modules 2 are arranged on a plane parallel to the bottom plate 312. By arranging the multiple battery modules 2 at intervals in the first direction, the multiple battery modules 2 can be arranged in sequence in the first direction, enabling each battery module 2 to be independent of each other and not interfere with each other. Among them, the first direction can be the left-right direction or the front-back direction in the illustrated direction. At the same time, the battery module 2 is spaced apart from the annular frame 311 in the second direction, and a buffer space 22 is formed between the battery module 2 and the annular frame 311. The buffer space 22 is used to play a buffering role when the battery pack 100 is laterally impacted, so as to protect the battery module 2 and reduce the possibility of the battery module 2 being damaged and failing under the action of the lateral impact force. Moreover, a buffer space 22 is formed between each battery module 2 and the annular frame 311 in the second direction, so that each battery module 2 can be protected by the buffer space 22. Among them, the second direction can be the front-back direction or the left-right direction in the illustrated direction.

[0070] Exemplarily, as Figures 3-5 shown, two battery modules 2 are arranged inside the battery pack 100. The two battery modules 2 are distributed at intervals in the left-right direction in the illustrated direction, that is, the first direction is the left-right direction in the illustrated direction. The two battery modules 2 both form a buffer space 22 with the annular frame 311 in the front-back direction in the illustrated direction, that is, the second direction is the front-back direction in the illustrated direction, and the first direction intersects with the second direction.

[0071] It should be noted that the number of battery modules 2 is not limited to that described in this embodiment and can be flexibly set according to specific requirements and space size.

[0072] In some embodiments, an inwardly open embedding groove 3121 is provided at the bottom of the annular frame 311. The end of the bottom plate 312 extends into the embedding groove 3121, and the bottom surface of the bottom plate 312 is flush with the bottom surface of the annular frame 311.

[0073] Specifically, as Figure 7 and Figure 9 shown, an embedding groove 3121 is also provided at the bottom of the annular frame 311. The embedding groove 3121 is used to enable the bottom plate 312 to partially extend into the embedding groove 3121 to realize the connection between the annular frame 311 and the bottom plate 312. The embedding groove 3121 is configured to be inwardly open, so that the bottom plate 312 can be arranged in the embedding groove 3121 from the inside of the annular frame 311 to realize the connection between the annular frame 311 and the bottom plate 312. The connection method is simple and convenient to operate. Moreover, since the bottom surface of the bottom plate 312 is flush with the bottom surface of the annular frame 311, the space occupied by the lower box assembly 3 in the Z direction can be reduced, and further the space occupied by the battery pack 100 in the Z direction can be reduced, which is beneficial to the installation of the battery pack 100 on the vehicle.

[0074] In addition, it should be noted that, as Figures 7-8 shown, a reinforcing plate 325 is further provided at the bottom of the bottom plate 312. The reinforcing plate 325 is used to enhance the structural strength of the bottom plate 312. There are eight reinforcing plates 325 provided at the bottom of the bottom plate 312, and the eight reinforcing plates 325 are arranged at intervals to effectively enhance the structural strength of the bottom plate 312 and reduce the possibility of deformation of the bottom plate 312 under the action of external forces. Among them, the number of the reinforcing plates 325 can be flexibly set according to specific requirements and the size of the space.

[0075] The present utility model also proposes a vehicle.

[0076] The vehicle according to the embodiment of the present utility model is provided with the battery pack 100 of any one of the above embodiments. By providing the box cover assembly 1 and the lower box body assembly 3, the battery module 2 can be jointly installed and protected, which can reduce the possibility of damage to the battery module 2 under the action of external forces. At the same time, by connecting the lower box body assembly 3 to the vehicle body, the installation of the battery pack 100 on the vehicle can be realized, and the structural strength of the battery pack 100 can be enhanced, reducing the possibility of deformation or damage of the battery pack 100 under the action of external forces. In addition, the space occupied by the battery pack 100 in the Z direction can be reduced, which is beneficial to the installation of the battery pack 100 on the vehicle.

[0077] In the description of the present specification, the descriptions referring to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0078] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A box cover assembly and a lower box assembly, wherein the lower box assembly is connected to the bottom of the box cover assembly to define a module space together, and the lower box assembly includes an outer box and an inner crossbeam, and the inner crossbeam is installed in the outer box; A battery module is installed in the module space, the battery module is supported by the internal cross beam, and the internal cross beam and the external box are both connected to the vehicle body.

2. The battery pack according to claim 1, characterized in that: The external box body includes an annular frame and a bottom plate, the bottom plate is connected to the bottom of the annular frame and together define an installation groove, the internal beam is installed in the installation groove, the internal beam is connected to the vehicle body via a first connecting member passing through the bottom plate, and the annular frame is connected to the vehicle body via a second connecting member.

3. The battery pack according to claim 2, characterized in that: The box cover assembly is provided with a penetration hole, and the first connecting member is also penetrated through the penetration hole and connected with the box cover assembly.

4. The battery pack according to claim 3, characterized in that: A support sleeve is provided between the box cover assembly and the internal cross beam, and the support sleeve is sleeved outside the first connecting member.

5. The battery pack according to claim 2, characterized in that: The inner crossbeam includes an end sub-crossbeam and a plurality of middle sub-crossbeams, wherein the end sub-crossbeam is spaced apart from the plurality of middle sub-crossbeams, and the end sub-crossbeam is connected to the inner end surface of the annular frame; Wherein, the end sub-crossbeam and the middle sub-crossbeam are both provided with a mounting portion for mounting the battery module, and the middle sub-crossbeam is provided with a first connecting hole for penetrating the first connecting member.

6. The battery pack according to claim 5, characterized in that: There are multiple battery modules; Two ends of one of the battery modules are respectively connected to the end sub-crossbeams and one of the middle sub-crossbeams, and two ends of the remaining battery modules are respectively connected to two adjacent middle sub-crossbeams.

7. The battery pack according to claim 6, characterized in that: The plurality of battery modules are distributed at intervals, and an escape space for evading the first connecting member is formed between two adjacent battery modules.

8. The battery pack according to claim 6, characterized in that: The plurality of battery modules are spaced apart and distributed along a first direction, and each of the battery modules is spaced apart from the annular frame along a second direction to form a buffer space, and the first direction intersects with the second direction.

9. The battery pack according to claim 2, characterized in that: The bottom of the annular frame is provided with an embedding groove which is open inwards, the end of the bottom plate extends into the embedding groove, and the bottom surface of the bottom plate is flush with the bottom surface of the annular frame.

10. A vehicle, characterized in that: A battery pack according to any one of claims 1 to 9 is provided.

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