Battery device and electric device

Abstract

The present application relates to the field of batteries, and relates to a battery device (100) and an electric device. The battery device (100) comprises: a case (10), wherein a mounting compartment (11) is formed in the case (10), and the mounting compartment (11) accommodates a plurality of battery cells (20); a first energy absorption structure (30) provided in the case (10), wherein at least one side of the mounting compartment (11) is provided with the first energy absorption structure (30), and the first energy absorption structure (30) is located outside the mounting compartment (11); and a second energy absorption structure (40), wherein at least part of the second energy absorption structure (40) is provided in the first energy absorption structure (30).

Description

Battery devices and electrical appliances Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery device and an electrical device having the battery device. Background Technology

[0002] In related technologies, battery devices are installed in electrical devices (e.g., vehicle chassis, ships, etc.). Taking the installation of battery devices in the chassis of a vehicle as an example, when a vehicle is involved in a collision, the chassis is prone to deformation and compression of the battery device, which can cause deformation and damage to individual battery cells inside the battery device, reducing the reliability of the battery device and thus reducing the reliability of the vehicle. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a battery device in which, upon collision, a first energy-absorbing structure and a second energy-absorbing structure simultaneously absorb the impact force, reducing the risk of deformation and damage to individual battery cells within the battery device, improving the reliability of the battery device, and thereby enhancing the reliability of the vehicle.

[0004] This application further proposes an electrical device.

[0005] In a first aspect, embodiments of this application provide a battery device, comprising:

[0006] The housing contains an installation compartment that holds multiple individual battery cells.

[0007] A first energy-absorbing structure and a second energy-absorbing structure are provided. The first energy-absorbing structure is located in the housing. The first energy-absorbing structure is provided on at least one side of the installation compartment. The first energy-absorbing structure is located outside the installation compartment. At least a part of the second energy-absorbing structure is located inside the first energy-absorbing structure.

[0008] In the above technical solution, by setting a first energy-absorbing structure, when a vehicle collides, the first energy-absorbing structure can absorb the impact force. Compared with the prior art, this reduces the force on the battery device, thereby reducing the force on the individual battery cells, lowering the risk of deformation and damage to the individual battery cells, improving the reliability of the battery device, and thus improving the reliability of the vehicle. Furthermore, by setting a second energy-absorbing structure, the second energy-absorbing structure can further absorb the impact force, further reducing the force on the battery device, further reducing the force on the individual battery cells, further improving the reliability of the battery device, and thus further improving the reliability of the vehicle.

[0009] In some embodiments, the first energy-absorbing structure includes: an energy-absorbing structure body defining an installation space, and a second energy-absorbing structure disposed within the installation space.

[0010] In the above technical solution, by placing the second energy-absorbing structure within the installation space, it is possible to achieve the effect of placing the second energy-absorbing structure within the first energy-absorbing structure. This allows for a compact overall structure of both the first and second energy-absorbing structures, thereby reducing the size of the battery device and consequently reducing the installation space required. Furthermore, when the battery device is impacted, the first energy-absorbing structure absorbs the force preferentially over the second energy-absorbing structure. The first energy-absorbing structure can absorb at least a portion of the impact force, thus protecting the second energy-absorbing structure and extending its service life.

[0011] In some embodiments, the installation space is provided with a partition structure to divide the installation space into multiple sub-installation spaces, and at least one sub-installation space is provided with a second energy-absorbing structure.

[0012] In the above technical solution, the partition structure within the installation space enhances the energy absorption capacity of the first energy-absorbing structure, enabling it to absorb more impact force and further reducing the stress on individual battery cells within the battery device. Furthermore, the partition structure reliably supports the main body of the energy-absorbing structure, reducing the risk of deformation of the first energy-absorbing structure. By providing a second energy-absorbing structure within at least one sub-installation space, it is easy to fix the second energy-absorbing structure within the first energy-absorbing structure. When multiple second energy-absorbing structures are provided, they can be respectively installed in different sub-installation spaces. When the first energy-absorbing structure is impacted, multiple second energy-absorbing structures can simultaneously absorb the impact force, further reducing the stress on individual battery cells within the battery device and lowering the risk of battery cell fire and explosion.

[0013] In some embodiments, the first energy-absorbing structure further includes an end cap, which is located on the side of the energy-absorbing structure body away from the installation chamber along the arrangement direction of the installation chamber and the first energy-absorbing structure. The end cap is fixed to the energy-absorbing structure body and covers the open end of the installation space.

[0014] In the above technical solution, the end cap is fixed to the main body of the energy-absorbing structure and is placed on the open end of the installation space away from the installation chamber. The end cap plays the role of dispersing the collision force. When the end cap is hit, the collision force can be transmitted along the end cap to the main body of the energy-absorbing structure and the partition structure. The collision force can be dispersed to different positions of the first energy-absorbing structure, reducing the risk of stress concentration in the first energy-absorbing structure, thereby improving the deformation resistance of the first energy-absorbing structure.

[0015] In some embodiments, the second energy-absorbing structure is fixed to the first energy-absorbing structure.

[0016] In the above technical solution, by fixing the second energy-absorbing structure to the first energy-absorbing structure, the risk of the second energy-absorbing structure moving within the first energy-absorbing structure can be reduced, as can the risk of noise generated by the second energy-absorbing structure colliding with the first energy-absorbing structure. This is beneficial to improving the ride comfort of the vehicle. Furthermore, when the first energy-absorbing structure is subjected to a collision, the second energy-absorbing structure being fixed to the first energy-absorbing structure facilitates the reliable transfer of the collision force from the first energy-absorbing structure to the second energy-absorbing structure. This helps to disperse the collision force, improve the energy absorption effect of the second energy-absorbing structure, and further reduce the force on the individual battery cells within the battery device.

[0017] In some embodiments, the second energy-absorbing structure is formed with a cavity.

[0018] In the above technical solution, the second energy-absorbing structure forms a cavity. When the second energy-absorbing structure is squeezed, it is beneficial for the second energy-absorbing structure to deform and absorb energy. When the second energy-absorbing structure is impacted, it is beneficial for the second energy-absorbing structure to transmit force in multiple directions. Furthermore, the deformation of the second energy-absorbing structure under pressure can absorb more impact force, which is beneficial for further improving the energy absorption capacity of the first energy-absorbing structure.

[0019] In some embodiments, there are multiple second energy-absorbing structures, and the multiple second energy-absorbing structures form at least one second energy-absorbing structure layer.

[0020] In the above technical solution, multiple second energy-absorbing structures are simultaneously installed within the first energy-absorbing structure. When the first energy-absorbing structure is impacted, the multiple second energy-absorbing structures can deform and absorb energy simultaneously, further enhancing the energy absorption capacity of the first energy-absorbing structure. Furthermore, the multiple second energy-absorbing structures form at least one layer of second energy-absorbing structure, which facilitates the transfer of impact force between adjacent second energy-absorbing structures within the same layer, promoting the dispersion of impact force and further reducing the risk of stress concentration in the first energy-absorbing structure.

[0021] In some embodiments, the second energy-absorbing structure layer is perpendicular to the arrangement direction of the mounting chamber and the first energy-absorbing structure.

[0022] In the above technical solution, the second energy-absorbing structure layer is perpendicular to the arrangement direction of the installation chamber and the first energy-absorbing structure. When the first energy-absorbing structure is subjected to a frontal impact, the second energy-absorbing structure is conducive to quickly transmitting the frontal impact force to the side, which is conducive to the rapid decomposition of the impact force and also conducive to improving the energy absorption performance of the first energy-absorbing structure.

[0023] In some embodiments, the second energy-absorbing structure layer is multi-layered, and the arrangement direction of the multi-layered second energy-absorbing structure layer is parallel to the arrangement direction of the mounting chamber and the first energy-absorbing structure.

[0024] In the above technical solution, by arranging the multiple layers of the second energy-absorbing structure in a direction parallel to the arrangement direction of the installation chamber and the first energy-absorbing structure, the number of second energy-absorbing structures can be increased. When the first energy-absorbing structure is impacted, more second energy-absorbing structures can absorb energy, thereby further improving the energy absorption capacity of the first energy-absorbing structure. In addition, it is also conducive to the transmission of the impact force between adjacent layers of the second energy-absorbing structure, which is more conducive to the dispersion of the impact force and further reduces the risk of stress concentration in the first energy-absorbing structure.

[0025] In some embodiments, the second energy-absorbing structure includes an energy-absorbing tube and / or an energy-absorbing ball.

[0026] In the above technical solution, by setting the second energy-absorbing structure as an energy-absorbing tube and / or an energy-absorbing ball, when the first energy-absorbing structure is impacted and the second energy-absorbing structure is impacted, the energy-absorbing tube can be crushed and deformed. The deformation of the energy-absorbing tube can absorb the impact force, thereby improving the energy absorption capacity of the battery device. By setting the second energy-absorbing structure as an energy-absorbing ball, when the energy-absorbing ball is impacted, the energy-absorbing ball can transmit force in multiple directions. For example, when the energy-absorbing ball is impacted head-on, the energy-absorbing ball can transmit the head-on impact force laterally. Furthermore, the energy-absorbing ball's deformation under pressure can absorb the impact force, which is beneficial for further improving the energy absorption capacity of the first energy-absorbing structure.

[0027] In some embodiments, the second energy-absorbing structure includes an energy-absorbing tube that extends along the arrangement direction of the mounting chamber and the first energy-absorbing structure.

[0028] In the above technical solution, by extending the energy-absorbing tube along the arrangement direction of the mounting compartment and the first energy-absorbing structure, when the energy-absorbing tube is impacted, it is beneficial to improve the deformation resistance of the second energy-absorbing structure, reduce the deformation risk of the second energy-absorbing structure, and also improve the energy absorption capacity of the second energy-absorbing structure, thereby reducing the risk of indentation in the box and thus reducing the risk of the battery cell being squeezed.

[0029] In some embodiments, multiple second energy-absorbing structures are provided, and the multiple second energy-absorbing structures are arranged to form at least one second energy-absorbing structure layer. The second energy-absorbing structure layer is perpendicular to the arrangement direction of the mounting chamber and the first energy-absorbing structures. At least one sub-mounting space is provided with a second energy-absorbing structure layer. Along the width direction of the second energy-absorbing structure layer, the ratio of the width dimension of the second energy-absorbing structure layer to the width dimension of the corresponding sub-mounting space is greater than or equal to 0.5 and less than or equal to 1; and / or

[0030] Along the height direction of the second energy-absorbing structure layer, the ratio of the height dimension of the second energy-absorbing structure layer to the height dimension of the corresponding sub-installation space is greater than or equal to 0.5 and less than or equal to 1. The width direction of the second energy-absorbing structure layer, the height direction of the second energy-absorbing structure layer, and the arrangement direction of the installation chamber and the first energy-absorbing structure are all perpendicular to each other.

[0031] In the above technical solution, by ensuring that the ratio of the width of the second energy-absorbing structure layer to the width of the corresponding sub-installation space is greater than or equal to 0.5 and less than or equal to 1, the distance between the second energy-absorbing structure layer and the inner wall of the sub-installation space can be appropriately adjusted along the width direction of the second energy-absorbing structure layer. This limits the range of motion of the second energy-absorbing structure layer, reduces noise generated by the second energy-absorbing structure impacting the first energy-absorbing structure, and facilitates the deformation and compression of the second energy-absorbing structure when the first energy-absorbing structure is impacted, thereby enabling the second energy-absorbing structure to participate in energy absorption and further reducing the risk of the battery cell being compressed. At the same time, it also facilitates the installation of the second energy-absorbing structure layer in the corresponding sub-installation space. By ensuring that the ratio of the height dimension of the second energy-absorbing structure layer to the height dimension of the corresponding sub-installation space is greater than or equal to 0.5 and less than or equal to 1, the distance between the second energy-absorbing structure and the inner wall of the sub-installation space can be appropriately maintained along the height dimension direction of the second energy-absorbing structure layer. This limits the range of motion of the second energy-absorbing structure, reduces noise generated by the second energy-absorbing structure impacting the first energy-absorbing structure, and facilitates the deformation and compression of the second energy-absorbing structure when the first energy-absorbing structure is impacted, thereby enabling the second energy-absorbing structure to participate in energy absorption and further reducing the risk of battery cells being compressed. At the same time, when the first energy-absorbing structure is impacted, there is sufficient space between the second energy-absorbing structure and the inner wall of the sub-installation space for the first energy-absorbing structure to deform, which is beneficial for the deformation and energy absorption of the first energy-absorbing structure and also facilitates the installation of the second energy-absorbing structure layer in the corresponding sub-installation space.

[0032] In some embodiments, the first energy-absorbing structure is located outside the housing.

[0033] In the above technical solution, the first energy-absorbing structure is set on the outside of the box. When the battery device is impacted, the first energy-absorbing structure is more likely to be impacted than the box. The first energy-absorbing structure can absorb energy first, reduce the force on the box, reduce the risk of box deformation, and further reduce the risk of battery cells being squeezed.

[0034] In some embodiments, the housing includes multiple side beams connected together to form an installation compartment, and at least one side beam is provided with a first energy-absorbing structure.

[0035] In the above technical solution, the installation compartment is arranged by the box body including multiple side beams. At least one side beam is equipped with a first energy-absorbing structure, which can be reasonably positioned so that the first energy-absorbing structure can absorb energy when the vehicle is in collision. Furthermore, the battery device can have an energy-absorbing effect in at least one direction where the first energy-absorbing structure is provided, thereby improving the collision safety of the battery device in at least one direction, further improving the reliability of the battery device, and thus further improving the reliability of the vehicle. This is more conducive to solving the battery device reliability problem when the vehicle is driving at high speed.

[0036] In some embodiments, at least a portion of the first energy-absorbing structure is located in the middle region of the respective side beam along the length direction of the side beam having the first energy-absorbing structure.

[0037] In the above technical solution, by at least partially setting the first energy-absorbing structure in the middle area of ​​the corresponding side beam, the first energy-absorbing structure can cover the middle area of ​​the side beam. Taking the front side beam of the mounting compartment as an example, when the vehicle is involved in a frontal collision, rear collision, or offset collision, the first energy-absorbing structure can absorb the collision force to a greater extent after being impacted, which can further reduce the force on the battery device, thereby further reducing the force on the individual battery cells in the battery device, further reducing the risk of deformation and damage to the individual battery cells, further improving the reliability of the battery device, and thus further improving the reliability of the vehicle. This is more conducive to solving the battery device reliability problem that exists when the vehicle is driving at high speed.

[0038] In some embodiments, along the arrangement direction of the first energy-absorbing structure and the mounting chamber, the orthographic projection of the first energy-absorbing structure and the orthographic projection of the corresponding side beam have an overlapping area.

[0039] In the above technical solution, along the arrangement direction of the corresponding first energy-absorbing structure and the mounting compartment, the orthographic projection of the first energy-absorbing structure and the orthographic projection of the corresponding side beam have an overlapping area. The side beam can reliably support the corresponding first and second energy-absorbing structures, which is beneficial to improving the supporting effect of the side beam on the corresponding first and second energy-absorbing structures, and improving the stability of the first and second energy-absorbing structures when subjected to external force collisions. Furthermore, when subjected to external force collisions, the first energy-absorbing structure can abut against the corresponding side beam, and the second energy-absorbing structure can also abut against the corresponding side beam. This is beneficial to improving the force transmission performance between the first energy-absorbing structure and the corresponding side beam, as well as between the second energy-absorbing structure and the corresponding side beam. It can transfer part of the collision force to the side beam, and the collision force can be transferred along the side beam and the vehicle chassis to other structural components of the vehicle, thus dispersing the collision force and reducing the risk of concentrated force. In addition, when a vehicle collision occurs, the first and second energy-absorbing structures can bear the force preferentially over the corresponding side beam, which is more conducive to reducing the force on the side beam, further reducing the risk of deformation of the corresponding side beam, and further reducing the force on the individual battery cells in the battery device.

[0040] In some embodiments, along the arrangement direction of the first energy-absorbing structure and the mounting chamber, the area of ​​the orthographic projection of the first energy-absorbing structure is S1, and the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure and the orthographic projection of the corresponding side beam is S2, satisfying: 10% ≤ S2 / S1 ≤ 100%.

[0041] In the above technical solution, by using 10%≤S2 / S1≤100%, the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure and the orthographic projection of the corresponding side beam is appropriate. When the first energy-absorbing structure is subjected to collision force, it is more conducive to improving the force transmission performance between the side beam and the first and second energy-absorbing structures. The side beam can more reliably support the corresponding first and second energy-absorbing structures, which is more conducive to improving the supporting role of the side beam on the corresponding first and second energy-absorbing structures. This further improves the stability of the first and second energy-absorbing structures when subjected to external force collision. Moreover, when a vehicle collision occurs, the first and second energy-absorbing structures are more likely to be subjected to force than the corresponding side beam, which is more conducive to reducing the force on the side beam, further reducing the risk of deformation of the corresponding side beam, and further reducing the force on the battery cells in the battery device.

[0042] In some embodiments, along the arrangement direction of the first energy-absorbing structure and the mounting chamber, the orthographic projection of the second energy-absorbing structure and the orthographic projection of the corresponding side beam have an overlapping area.

[0043] In the above technical solution, along the arrangement direction of the corresponding first energy-absorbing structure and the mounting compartment, the orthographic projection of the second energy-absorbing structure and the orthographic projection of the corresponding side beam have an overlapping area. The side beam can reliably support the corresponding second energy-absorbing structure, which is beneficial to improving the supporting effect of the side beam on the corresponding second energy-absorbing structure and improving the stability of the first and second energy-absorbing structures when subjected to external force collisions. Furthermore, when subjected to external force collisions, the second energy-absorbing structure can abut against the corresponding side beam, which is beneficial to improving the force transmission performance between the second energy-absorbing structure and the corresponding side beam. It can transfer part of the collision force to the side beam, and the collision force can be transferred along the side beam and the vehicle chassis to other structural components of the vehicle, thus dispersing the collision force and reducing the risk of concentrated force. In addition, when the vehicle collides, the second energy-absorbing structure can bear the force preferentially over the corresponding side beam, which is more conducive to reducing the force on the side beam, further reducing the risk of deformation of the corresponding side beam, and further reducing the force on the individual battery cells in the battery device.

[0044] In some embodiments, the plurality of side beams includes: two first side beams and two second side beams, the two first side beams being arranged opposite to each other and spaced apart along the length direction of the battery device, the two second side beams being arranged opposite to each other and spaced apart along the width direction of the battery device, and at least one of the two first side beams being provided with a first energy-absorbing structure.

[0045] In the above technical solution, by setting two first side beams and two second side beams, the effect of forming an installation compartment can be achieved, which also simplifies the structure of the box and facilitates its production and manufacturing. Furthermore, by incorporating a first energy-absorbing structure in at least one of the two first side beams, the first energy-absorbing structure can absorb at least a portion of the impact force. The impact force not absorbed by the first energy-absorbing structure can be transferred to the first side beam, and then to the two second side beams. The impact force can then be transferred along the side beams to the box and other structural components of the vehicle, thus dispersing the impact force, reducing the risk of concentrated stress, further reducing the stress on individual battery cells within the battery pack, further reducing the risk of squeezing individual battery cells, further reducing the risk of deformation and damage to individual battery cells, further improving the reliability of the battery pack, and thus further improving the reliability of the vehicle.

[0046] In some embodiments, the installation chamber is provided with a partition beam to divide the installation chamber into an energy chamber and a buffer chamber. The energy chamber contains multiple battery cells, and a buffer chamber is provided between at least one first energy-absorbing structure and the energy chamber.

[0047] In the above technical solution, a buffer chamber is provided between at least one first energy-absorbing structure and the energy chamber. The buffer chamber provides space for the side beam to collapse and has a buffering effect. When the corresponding side beam with the first energy-absorbing structure is deformed by the collision force, the corresponding side beam can collapse and deform toward the buffer chamber, reducing the risk of the side beam deformation squeezing the battery cell, further reducing the risk of battery cell deformation and damage, further improving the reliability of the battery device, thereby further improving the reliability of the vehicle, and more effectively solving the battery device reliability problem when the vehicle is driving at high speed.

[0048] In some embodiments, the energy chamber and the buffer chamber are arranged along the length of the battery device.

[0049] In the above technical solution, the energy compartment and the buffer compartment are arranged along the length of the battery device. When the battery device is subjected to a collision force along the length of the battery device or an offset collision force, the buffer compartment can effectively provide a crumple space for the deformation of the corresponding side beam, effectively reducing the risk of the side beam deforming and squeezing the battery cells, further reducing the risk of battery cell deformation and damage, further improving the reliability of the battery device, thereby further improving the reliability of the vehicle, and is more conducive to solving the battery device reliability problem when the vehicle is driving at high speed, thus making the arrangement of the energy compartment and the buffer compartment reasonable.

[0050] In some embodiments, the plurality of side beams includes: two first side beams and two second side beams, the two first side beams being arranged opposite to each other and spaced apart along the length direction of the battery device, the two second side beams being arranged opposite to each other and spaced apart along the width direction of the battery device, a partition beam extending along the width direction of the battery device and connecting between the two second side beams, the partition beam being spaced apart from both of the two first side beams, so as to form an energy chamber between the partition beam and one of the first side beams, and a buffer chamber between the partition beam and the other first side beam.

[0051] In the above technical solution, the partition beam extends along the width direction of the battery device and connects between the two second side beams. The partition beam is spaced apart from the two first side beams. An energy chamber can be formed between the partition beam and one first side beam, or a buffer chamber can be formed between the partition beam and the other first side beam, so as to achieve the effect of arranging the energy chamber and the buffer chamber along the length direction of the battery device.

[0052] In some embodiments, the battery device further includes a third energy-absorbing structure disposed within a buffer chamber.

[0053] In the above technical solution, by placing the third energy-absorbing structure inside the buffer compartment, the third energy-absorbing structure has an energy-absorbing function, enabling the housing to have a multi-level energy-absorbing effect. After the first energy-absorbing structure is impacted, the first and second energy-absorbing structures can absorb at least part of the impact force. The unabsorbed impact force can be transferred to the corresponding side beam 12. After the corresponding side beam deforms, it can compress the third energy-absorbing structure. The third energy-absorbing structure further absorbs the impact force, reducing the compression of the battery cells during the impact. This can further reduce the force on the battery cells in the battery device, further reduce the risk of deformation and damage to the battery cells in the battery device, further improve the reliability of the battery device, and thus further improve the reliability of the vehicle.

[0054] In some embodiments, the third energy-absorbing structure includes at least one of an energy-absorbing box, a buffer frame, a spring, and an airbag.

[0055] In the above technical solution, by including at least one of the energy-absorbing structure, energy-absorbing box, buffer frame, spring and airbag, the third energy-absorbing structure can have energy-absorbing performance, thereby meeting the working requirements of the third energy-absorbing structure and improving the energy absorption effect of the third energy-absorbing structure. After the third energy-absorbing structure is impacted, it can absorb more impact force and further reduce the force on the battery cell.

[0056] In some embodiments, the third energy-absorbing structure is fixedly connected to at least one of the partition beam and the side beam of the box.

[0057] In the above technical solution, by fixing the third energy-absorbing structure to at least one of the partition beam and the side beam of the box, the third energy-absorbing structure can be fixed in the buffer chamber, reducing the risk of the third energy-absorbing structure moving in the buffer chamber, so that the third energy-absorbing structure can reliably correspond to the corresponding first energy-absorbing structure, and when the first energy-absorbing structure is subjected to a collision force, the third energy-absorbing structure can absorb the energy.

[0058] Secondly, embodiments of this application also provide an electrical device, including the battery device described above.

[0059] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0060] Figure 1 is a schematic diagram of a vehicle according to an embodiment of this application;

[0061] Figure 2 is a top view of a battery device according to an embodiment of this application;

[0062] Figure 3 is an exploded view of a battery device according to a first embodiment of this application;

[0063] Figure 4 is an enlarged view of point C in Figure 3;

[0064] Figure 5 is a front view of a battery device according to a first embodiment of this application;

[0065] Figure 6 is a schematic diagram of the assembly of the first energy-absorbing structure and the second energy-absorbing structure of the battery device according to the first embodiment of this application;

[0066] Figure 7 is an exploded view of a battery device according to a second embodiment of this application;

[0067] Figure 8 is an enlarged view of point D in Figure 7;

[0068] Figure 9 is a front view of a battery device according to a second embodiment of this application;

[0069] Figure 10 is a schematic diagram of the assembly of the first energy-absorbing structure and the second energy-absorbing structure of the battery device according to the second embodiment of this application.

[0070] Figure 11 is a schematic diagram of the third energy-absorbing structure disposed in the buffer chamber according to an embodiment of the present application. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0072] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0073] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0074] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0076] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0077] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0078] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0079] In this application, "multiple" means two or more (including two).

[0080] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0081] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0082] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0083] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0084] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0085] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0086] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0087] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0088] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0089] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space (i.e., an installation compartment) inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first enclosure may be a top cover or a bottom plate.

[0090] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0091] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0092] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0093] A battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of an anode electrode, a cathode electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the anode and cathode electrodes. The anode electrode includes an anode current collector and an anode active material layer. The anode active material layer is coated on the surface of the anode current collector. The uncoated anode current collector protrudes beyond the coated anode current collector and serves as the anode tab. Taking a lithium-ion battery as an example, the anode current collector can be made of aluminum, and the anode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The cathode electrode includes a cathode current collector and a cathode active material layer. The cathode active material layer is coated on the surface of the cathode current collector. The uncoated cathode current collector protrudes beyond the coated cathode current collector and serves as the cathode tab. The cathode current collector can be made of copper, and the cathode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple anode tabs stacked together, and there are multiple cathode tabs stacked together.

[0094] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0095] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. As a core component of new energy vehicles, battery devices have high requirements for reliability.

[0096] The battery pack is installed in the vehicle's chassis. When the vehicle is involved in a collision, the chassis is prone to deformation and compression of the battery pack, which can cause deformation and damage to the individual battery cells inside the battery pack. This reduces the reliability of the battery pack and, consequently, the reliability of the vehicle.

[0097] Based on the above considerations, to address the issues of battery cell deformation and damage during vehicle collisions, a battery device has been designed after in-depth research. The device includes: a housing with an installation compartment containing multiple battery cells; a first energy-absorbing structure and a second energy-absorbing structure. The first energy-absorbing structure is located within the housing, and at least one side of the installation compartment is also equipped with the first energy-absorbing structure, which is located outside the installation compartment. At least a portion of the second energy-absorbing structure is located within the first energy-absorbing structure. By incorporating the first energy-absorbing structure, it can absorb the impact force during a collision, reducing the stress on the battery device compared to existing technologies. This reduces the stress on the battery cells within the device, lowering the risk of deformation and damage. Furthermore, the second energy-absorbing structure absorbs the impact force, further reducing the stress on the battery device and its individual cells, thus improving the reliability of the battery device and ultimately enhancing the reliability of the vehicle.

[0098] Please refer to Figure 1, which is a schematic diagram of the structure of a vehicle 200 provided in some embodiments of this application. The vehicle 200 can be a gasoline-powered vehicle or a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. A battery device 100 is mounted on the chassis of the vehicle 200. The battery device 100 can be used to power the vehicle 200; for example, the battery device 100 can serve as the operating power source for the vehicle 200. The vehicle 200 may also include a controller 201 and a motor 202. The controller 201 controls the battery device 100 to supply power to the motor 202, for example, to meet the power requirements of the vehicle 200 during startup, navigation, and driving.

[0099] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 200, but also as the driving power source for the vehicle 200, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 200.

[0100] The battery device 100 according to an embodiment of the present application is described below with reference to Figures 1-11. The battery device 100 can be installed on the chassis of a vehicle 200.

[0101] As shown in Figures 2-11, the battery device 100 according to an embodiment of this application includes: a housing 10, an installation compartment 11 formed inside the housing 10, the installation compartment 11 accommodating a plurality of battery cells 20; a first energy-absorbing structure 30 and a second energy-absorbing structure 40, the first energy-absorbing structure 30 being disposed in the housing 10, the first energy-absorbing structure 30 being disposed on at least one side of the installation compartment 11, the first energy-absorbing structure 30 being located outside the installation compartment 11, and at least a portion of the second energy-absorbing structure 40 being disposed inside the first energy-absorbing structure 30.

[0102] When the battery device 100 is installed on the vehicle 200, the length direction of the battery device 100 is parallel to the driving direction of the vehicle 200, and the width direction of the battery device 100 is parallel to the width direction of the vehicle 200. As shown in Figure 2, the length direction of the battery device 100 is the X direction in Figure 2, and the width direction of the battery device 100 is the Y direction in Figure 2.

[0103] The battery device 100 includes a housing 10, a first energy-absorbing structure 30, and a second energy-absorbing structure 40. An installation chamber 11 is formed within the housing 10, defined by the housing 10, and multiple battery cells 20 are installed within the installation chamber 11. The first energy-absorbing structure 30 can be constructed as an energy-absorbing box, a buffer frame, etc. The second energy-absorbing structure 40 can also be constructed as an energy-absorbing box, a buffer frame, etc. The first energy-absorbing structure 30 can be welded to the housing 10, bolted to the housing 10, or indirectly installed to the housing 10 via an adapter. However, this application is not limited to these methods; the first energy-absorbing structure 30 can also be fixed to the housing 10 in other ways, as long as the first energy-absorbing structure 30 is fixed to the housing 10.

[0104] At least one side of the mounting compartment 11 is provided with a first energy-absorbing structure 30. It should be noted that along the circumferential direction of the battery device 100, the battery device 100 has multiple side edges, and at least one side edge is provided with a corresponding first energy-absorbing structure 30. As an example, the battery device 100 has a front, rear, left, and right side, and the front side of the mounting compartment 11 is provided with the first energy-absorbing structure 30. As another example, the battery device 100 has a front, rear, left, and right side, and the rear side of the mounting compartment 11 is provided with the first energy-absorbing structure 30. As another example, the battery device 100 has a front, rear, left, and right side, and the left side of the mounting compartment 11 is provided with the first energy-absorbing structure 30. As another example, the battery device 100 has a front, rear, left, and right side, and the right side of the mounting compartment 11 is provided with the first energy-absorbing structure 30. As yet another example, the battery device 100 has a front, rear, left, and right side, and the front, rear, left, and right sides of the mounting compartment 11 are all provided with the first energy-absorbing structure 30. As another example, the battery device 100 has a front, rear, left, and right side, and at least two of the front, rear, left, and right sides of the mounting compartment 11 are provided with a first energy-absorbing structure 30. As yet another example, the battery device 100 has a front, rear, left, and right side, and at least three of the front, rear, left, and right sides of the mounting compartment 11 are provided with a first energy-absorbing structure 30. This application uses the front side of the mounting compartment 11 as an example where the first energy-absorbing structure 30 is provided. When the side of the battery device 100 provided with the first energy-absorbing structure 30 and the second energy-absorbing structure 40 is impacted, the first energy-absorbing structure 30 and the second energy-absorbing structure 40 can absorb the impact force and protect the battery device 100.

[0105] The first energy-absorbing structure 30 is disposed outside the installation chamber 11. The first energy-absorbing structure 30 can be disposed outside the housing 10, or it can be disposed within the side beam 50 of the housing 10. This application uses the example of the first energy-absorbing structure 30 being disposed outside the housing 10 for illustration. At least a portion of the second energy-absorbing structure 40 is disposed within the first energy-absorbing structure 30. That is, the second energy-absorbing structure 40 can be partially disposed within the first energy-absorbing structure 30, or its entire structure can be disposed within the first energy-absorbing structure 30. This application uses the example of the second energy-absorbing structure 40 being entirely disposed within the first energy-absorbing structure 30 for illustration. The second energy-absorbing structure 40 can be fixed to the first energy-absorbing structure 30, or it can be fixed to the housing 10, or it can be fixed to both the first energy-absorbing structure 30 and the housing 10.

[0106] This application describes an example where a first energy-absorbing structure 30 and a second energy-absorbing structure 40 are provided at the front of the installation compartment 11. When the vehicle 200 is moving forward, stopped, or moving backward, and is impacted from the front, for example, when the vehicle 200 is traveling at high speed (e.g., speeds above 100 kph), the first energy-absorbing structure 30 absorbs at least a portion of the impact force. This impact force can be transferred to the second energy-absorbing structure 40, which also absorbs at least a portion of the impact force. The unabsorbed impact force can be transferred to the housing 10 and the chassis of the vehicle 200, and can then be transferred along the chassis to the vehicle 200. On other structural components of the battery device 100, the collision force is dispersed, reducing the risk of concentrated force. Compared with the prior art, this can reduce the force on the battery cells 20 inside the battery device 100, reduce the risk of squeezing the battery cells 20, reduce the risk of deformation and damage to the battery cells 20 inside the battery device 100, improve the reliability of the battery device 100, and thus improve the reliability of the electrical device. This helps to solve the reliability problem of the battery device 100 when the vehicle 200 is traveling at high speed. When the vehicle 200 is involved in a collision at high speed, the risk of deformation and damage to the battery cells 20 inside the battery device 100 can be reduced.

[0107] Similarly, when the first energy-absorbing structure 30 and the second energy-absorbing structure 40 are provided at the rear of the installation compartment 11, when the rear of the vehicle 200 is impacted, the first energy-absorbing structure 30 can absorb at least part of the impact force after being impacted. The impact force can be transferred to the second energy-absorbing structure 40, which can also absorb at least part of the impact force. The unabsorbed impact force can be transferred to the housing 10 and the chassis of the vehicle 200. The impact force can be transferred along the chassis to other structural components of the vehicle 200, thus dispersing the impact force, reducing the risk of concentrated force, reducing the force on the battery cell 20, reducing the risk of squeezing the battery cell 20, reducing the risk of deformation and damage to the battery cell 20, improving the reliability of the battery device 100, and thus improving the reliability of the vehicle 200.

[0108] In the above technical solution, by setting the first energy-absorbing structure 30, when the vehicle 200 collides, the first energy-absorbing structure 30 can absorb the impact force. Compared with the prior art, this can reduce the force on the battery device 100, thereby reducing the force on the individual battery cells 20 within the battery device 100, reducing the risk of deformation and damage to the individual battery cells 20, improving the reliability of the battery device 100, and thus improving the reliability of the vehicle 200. Furthermore, by setting the second energy-absorbing structure 40, the second energy-absorbing structure 40 can further absorb the impact force, further reducing the force on the battery device 100, thereby further reducing the force on the individual battery cells 20 within the battery device 100, further improving the reliability of the battery device 100, and thus further improving the reliability of the vehicle 200.

[0109] According to some embodiments of this application, as shown in Figures 4 and 8, the first energy-absorbing structure 30 includes: an energy-absorbing structure body 31, the energy-absorbing structure body 31 defining an installation space 32, and a second energy-absorbing structure 40 disposed within the installation space 32.

[0110] The first energy-absorbing structure 30 includes an energy-absorbing structure body 31, which defines an installation space 32. The installation space 32 can be a closed space. As an example, the energy-absorbing structure body 31 is a box-shaped structure, defining a closed space. The installation space 32 can also be a space open at least one end. As an example, the installation space 32 is an open space at one end, which can be open at the end opposite to the installation chamber 11. The energy-absorbing structure body 31 can define an open installation groove, which is constructed as the installation space 32. As another example, the installation space 32 is an open space at both ends. Along the arrangement direction of the first energy-absorbing structure 30 and the installation chamber 11, the installation space 32 is open at both ends. The energy-absorbing structure body 31 can define the open installation space 32 at both ends. The energy-absorbing structure body 31 can be an annular structure. When the first energy-absorbing structure 30 is installed on the outside of the housing 10, the housing 10 can cover the open end of the installation space 32 facing the housing 10. The second energy-absorbing structure 40 is disposed within the installation space 32. The second energy-absorbing structure 40 may be fixed to the main body 31 of the energy-absorbing structure. Alternatively, the second energy-absorbing structure 40 may not be fixed to the main body 31 of the energy-absorbing structure, that is, the second energy-absorbing structure 40 can simply be installed within the installation space 32.

[0111] In the above technical solution, by placing the second energy-absorbing structure 40 within the installation space 32, the effect of placing the second energy-absorbing structure 40 within the first energy-absorbing structure 30 can be achieved. This makes the overall structure of the first energy-absorbing structure 30 and the second energy-absorbing structure 40 compact, thereby reducing the volume of the battery device 100 and consequently reducing the installation space 32 of the battery device 100. Furthermore, when the battery device 100 is impacted, the first energy-absorbing structure 30 takes priority over the second energy-absorbing structure 40 in receiving the force. The first energy-absorbing structure 30 can absorb at least part of the impact force, thus protecting the second energy-absorbing structure 40 and extending its service life.

[0112] According to some embodiments of this application, as shown in Figures 4 and 8, the installation space 32 is provided with a partition structure 33 to divide the installation space 32 into a plurality of sub-installation spaces 34, and at least one sub-installation space 34 is provided with a second energy-absorbing structure 40.

[0113] The first energy-absorbing structure 30 may further include a partition structure 33, which is disposed within the installation space 32 and fixedly connected to the main body 31 of the energy-absorbing structure. Furthermore, the partition structure 33 and the main body 31 of the energy-absorbing structure are integrally formed. The partition structure 33 divides the installation space 32 into multiple sub-installation spaces 34. The partition structure 33 can divide the installation space 32 into two, three, four, five, six, or other numbers of sub-installation spaces 34. This application uses the partition structure 33 dividing the installation space 32 into sixteen sub-installation spaces 34 as an example. As an example, the partition structure 33 includes a first plate 331 and a second plate 332. The first plate 331 extends horizontally, and the second plate 332 extends vertically along the height of the battery device 100. The first plate 331 and the second plate 332 are intersected, and the partition structure 33 divides the installation space 32 into four sub-installation spaces 34. As an example, the partition structure 33 includes a first plate 331 and seven second plates 332. The first plate 331 extends horizontally, and the seven second plates 332 extend vertically along the battery device 100. The seven second plates 332 are arranged at intervals along the extension direction of the first plate 331, with the first plate 331 and the seven second plates 332 intersecting each other. The partition structure 33 divides the installation space 32 into sixteen sub-installation spaces 34. At least one sub-installation space 34 is provided with a second energy-absorbing structure 40. That is, a second energy-absorbing structure 40 may be provided in one sub-installation space 34, or multiple sub-installation spaces 34 may each be provided with a second energy-absorbing structure 40.

[0114] The installation space 32 is equipped with a partition structure 33, which can divide the installation space 32 into multiple sub-installation spaces 34. This can improve the energy absorption capacity of the first energy-absorbing structure 30, allowing the first energy-absorbing structure 30 to absorb more collision forces, further reducing the force on the battery cells 20 in the battery device 100. In addition, the partition structure 33 can reliably support the main body 31 of the energy-absorbing structure, reducing the risk of deformation of the first energy-absorbing structure 30. A second energy-absorbing structure 40 is provided in at least one sub-installation space 34. The second energy-absorbing structure 40 can be fixed on the partition structure 33, which facilitates the fixation of the second energy-absorbing structure 40 within the first energy-absorbing structure 30. When multiple second energy-absorbing structures 40 are provided, they can be respectively provided in different sub-installation spaces 34. As an example, the second energy-absorbing structures 40 and the sub-installation spaces 34 are provided in a one-to-one correspondence. When the first energy-absorbing structure 30 is impacted, multiple second energy-absorbing structures 40 can absorb the impact force simultaneously, further reducing the force on the battery cell 20 within the battery device 100 and reducing the risk of fire and explosion of the battery cell 20.

[0115] In the above technical solution, the partition structure 33 within the installation space 32 enhances the energy absorption capacity of the first energy-absorbing structure 30, enabling it to absorb more impact force and further reducing the stress on the battery cells 20 within the battery device 100. Furthermore, the partition structure 33 reliably supports the main body 31 of the energy-absorbing structure, reducing the risk of deformation of the first energy-absorbing structure 30. The presence of a second energy-absorbing structure 40 within at least one sub-installation space 34 facilitates its fixation within the first energy-absorbing structure 30. When multiple second energy-absorbing structures 40 are provided, they can be disposed in different sub-installation spaces 34. When the first energy-absorbing structure 30 is impacted, multiple second energy-absorbing structures 40 can simultaneously absorb the impact force, further reducing the stress on the battery cells 20 within the battery device 100 and lowering the risk of fire or explosion of the battery cells 20.

[0116] According to some embodiments of this application, as shown in Figures 4 and 8, the first energy-absorbing structure 30 may further include: an end cap 35, which is located on the side of the energy-absorbing structure body 31 away from the installation chamber 11 along the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30, and the end cap 35 is fixed to the energy-absorbing structure body 31 and covers the open end of the installation space 32.

[0117] The first energy-absorbing structure 30 may further include an end cap 35, with the installation space 32 open at the end opposite to the installation chamber 11 along the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30. As an example, the installation space 32 is an open space at one end, with the end of the installation space 32 open away from the installation chamber 11. The energy-absorbing structure body 31 may define an open mounting groove, which is constructed as the installation space 32. As another example, the installation space 32 is an open space at both ends, with both ends open along the arrangement direction of the first energy-absorbing structure 30 and the installation chamber 11. The energy-absorbing structure body 31 may define the open installation space 32 at both ends. The energy-absorbing structure body 31 may be an annular structure. When the first energy-absorbing structure 30 is installed outside the housing 10, the housing 10 may cover the open end of the installation space 32 facing the housing 10. Along the arrangement direction of the mounting chamber 11 and the first energy-absorbing structure 30, the end cap 35 is located on the side of the energy-absorbing structure body 31 away from the mounting chamber 11. The end cap 35 is fixed to the energy-absorbing structure body 31. The end cap 35 can be welded to the energy-absorbing structure body 31, or it can be bonded to the energy-absorbing structure body 31, or it can be snapped to the energy-absorbing structure body 31. The end cap 35 covers the open end of the mounting space 32 away from the mounting chamber 11. Furthermore, the end cap 35 can be arranged opposite to the partition structure 33, and the end cap 35 can abut against the partition structure 33.

[0118] In the above technical solution, the end cap 35 is fixed to the main body of the energy-absorbing structure 31 and covers the open end of the installation space 32 away from the installation chamber 11. The end cap 35 plays the role of dispersing the collision force. When the end cap 35 is hit, the collision force can be transmitted along the end cap 35 to the main body of the energy-absorbing structure 31 and the partition structure 33. The collision force can be dispersed to different positions of the first energy-absorbing structure 30, reducing the risk of stress concentration in the first energy-absorbing structure 30, thereby improving the deformation resistance of the first energy-absorbing structure 30.

[0119] According to some embodiments of this application, the second energy-absorbing structure 40 is fixed to the first energy-absorbing structure 30.

[0120] The second energy-absorbing structure 40 can be fixed to the first energy-absorbing structure 30 by bolts, or the second energy-absorbing structure 40 can be bonded to the first energy-absorbing structure 30, or the second energy-absorbing structure 40 and the first energy-absorbing structure 30 can be integrally formed. Alternatively, the second energy-absorbing structure 40 can be welded to the first energy-absorbing structure 30. As an example, the second energy-absorbing structure 40 is fixed to the energy-absorbing structure body 31 of the first energy-absorbing structure 30. As another example, the second energy-absorbing structure 40 is fixed to the partition structure 33 of the first energy-absorbing structure 30. As yet another example, the second energy-absorbing structure 40 is fixed to both the partition structure 33 and the energy-absorbing structure body 31 of the first energy-absorbing structure 30.

[0121] In the above technical solution, by fixing the second energy-absorbing structure 40 to the first energy-absorbing structure 30, the risk of the second energy-absorbing structure 40 moving within the first energy-absorbing structure 30 can be reduced, and the risk of noise generated by the second energy-absorbing structure 40 impacting the first energy-absorbing structure 30 can be reduced, thereby improving the ride comfort of the vehicle 200. Furthermore, when the first energy-absorbing structure 30 is impacted, the second energy-absorbing structure 40 being fixed to the first energy-absorbing structure 30 facilitates the reliable transfer of the impact force from the first energy-absorbing structure 30 to the second energy-absorbing structure 40, thereby helping to disperse the impact force, improve the energy absorption effect of the second energy-absorbing structure 40, and further reduce the force on the battery cells 20 within the battery device 100.

[0122] According to some embodiments of this application, the second energy-absorbing structure 40 is formed with a cavity.

[0123] The second energy-absorbing structure 40 has a cavity, which can be an open cavity 411 or a closed cavity, making the second energy-absorbing structure 40 a hollow structure.

[0124] In the above technical solution, the second energy-absorbing structure 40 forms a cavity 411. When the second energy-absorbing structure 40 is squeezed, it is beneficial for the second energy-absorbing structure 40 to deform and absorb energy. When the second energy-absorbing structure 40 is impacted, it is beneficial for the second energy-absorbing structure 40 to transmit force in multiple directions. Furthermore, the deformation of the second energy-absorbing structure 40 under pressure can absorb more impact force, which is beneficial for further improving the energy absorption capacity of the first energy-absorbing structure 30.

[0125] According to some embodiments of this application, as shown in Figures 3-6, a plurality of second energy-absorbing structures 40 are provided, and the plurality of second energy-absorbing structures 40 are arranged to form at least one second energy-absorbing structure layer 43.

[0126] The second energy-absorbing structure 40 can be configured in multiple ways. Multiple second energy-absorbing structures 40 can be arranged to form a single second energy-absorbing structure layer 43, or multiple second energy-absorbing structures 40 can form multiple second energy-absorbing structure layers 43. The number of second energy-absorbing structure layers 43 can be selected reasonably according to the actual situation. A single second energy-absorbing structure layer 43 can include multiple second energy-absorbing structures 40. Any two adjacent second energy-absorbing structures 40 in the same layer 43 can be fixedly connected, or any two adjacent second energy-absorbing structures 40 in the same layer 43 can abut against each other.

[0127] In the above technical solution, multiple second energy-absorbing structures 40 are configured and simultaneously installed within the first energy-absorbing structure 30. When the first energy-absorbing structure 30 is impacted, the multiple second energy-absorbing structures 40 can deform and absorb energy simultaneously, further enhancing the energy absorption capacity of the first energy-absorbing structure 30. Furthermore, the multiple second energy-absorbing structures 40 form at least one second energy-absorbing structure layer 43, which facilitates the transmission of impact force between adjacent second energy-absorbing structures 40 within the same second energy-absorbing structure layer 43. This promotes efficient energy absorption by the second energy-absorbing structures 40, facilitates the dispersion of impact force, and further reduces the risk of stress concentration in the first energy-absorbing structure 30.

[0128] According to some embodiments of this application, as shown in Figures 3-6, the second energy-absorbing structure layer 43 is perpendicular to the arrangement direction of the mounting chamber 11 and the first energy-absorbing structure 30.

[0129] The second energy-absorbing structure layer 43 is perpendicular to the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30. It can also be understood that the second energy-absorbing structure layer 43 is perpendicular to the depth direction of the installation space 32. It should be noted that the second energy-absorbing structure layer 43 is perpendicular or approximately perpendicular to the depth direction of the installation space 32. The depth direction of the installation space 32 refers to the arrangement direction of the first energy-absorbing structure 30 and the installation chamber 11.

[0130] In the above technical solution, the second energy-absorbing structure layer 43 is perpendicular to the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30. When the first energy-absorbing structure 30 is subjected to a frontal impact, the second energy-absorbing structure 40 is conducive to quickly transmitting the frontal impact force to the side, which is conducive to the rapid decomposition of the impact force and also conducive to improving the energy absorption performance of the first energy-absorbing structure 30.

[0131] According to some embodiments of this application, as shown in Figures 3-6, the second energy-absorbing structure layer 43 is multi-layered, and the arrangement direction of the multi-layered second energy-absorbing structure layer 43 is parallel to the arrangement direction of the mounting chamber 11 and the first energy-absorbing structure 30.

[0132] Multiple second energy-absorbing structures 40 can form multiple layers of second energy-absorbing structures 43. These multiple layers of second energy-absorbing structures 43 can have two, three, four, or five layers. This application uses twelve layers of second energy-absorbing structures 43 as an example for illustration. The number of second energy-absorbing structures 43 can be reasonably selected according to actual conditions. The arrangement direction of the multiple layers of second energy-absorbing structures 43 is parallel to the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30. This can also be understood as the multiple layers of second energy-absorbing structures 43 being arranged along the depth direction of the sub-installation space 34. The depth direction of the installation space 32 refers to the arrangement direction of the first energy-absorbing structure 30 and the installation chamber 11. Any two adjacent layers of second energy-absorbing structures 43 abut against each other.

[0133] In the above technical solution, by arranging the multi-layer second energy-absorbing structure layer 43 in a direction parallel to the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30, the number of second energy-absorbing structures 40 can be increased. When the first energy-absorbing structure 30 is impacted, more second energy-absorbing structures 40 can absorb energy, thereby further improving the energy absorption capacity of the first energy-absorbing structure 30. In addition, it is also beneficial to the transmission of collision force between adjacent second energy-absorbing structure layers 43, which is more conducive to the dispersion of collision force and further reduces the risk of stress concentration in the first energy-absorbing structure 30.

[0134] According to some embodiments of this application, as shown in Figures 7-10, the second energy-absorbing structure 40 includes an energy-absorbing tube 41 and / or an energy-absorbing ball 42.

[0135] The second energy-absorbing structure 40 includes an energy-absorbing tube 41, or an energy-absorbing ball 42, or both. When the second energy-absorbing structure 40 is constructed as an energy-absorbing tube 41, the energy-absorbing tube 41 is annular, which can also be understood as a tubular structure. The energy-absorbing tube 41 can define a cavity 411. The cross-sectional shape of the energy-absorbing tube 41 can be polygonal; for example, the cross-sectional shape of the energy-absorbing tube 41 is quadrilateral. The cross-sectional shape of the energy-absorbing tube 41 can also be circular or similar to a circle. The energy-absorbing tube 41 can be made of materials such as aluminum, steel, copper, plastic, or glass.

[0136] In the above technical solution, by setting the second energy-absorbing structure 40 as an energy-absorbing tube 41, when the first energy-absorbing structure 30 is impacted and the second energy-absorbing structure 40 is impacted, the energy-absorbing tube 41 can be crushed and deformed. The deformation of the energy-absorbing tube 41 can absorb the impact force, thereby improving the energy absorption capacity of the battery device 100.

[0137] According to some embodiments of this application, as shown in Figures 3-6, when the second energy-absorbing structure 40 is constructed as an energy-absorbing ball 42, the energy-absorbing ball 42 can be spherical or similar in shape. The energy-absorbing ball 42 can be made of materials such as aluminum, steel, copper, plastic, glass, and rubber. The energy-absorbing ball 42 can be sealed within the installation space 32 of the first energy-absorbing structure 30 by the end cap 35.

[0138] In the above technical solution, by setting the second energy-absorbing structure 40 as an energy-absorbing ball 42, when the energy-absorbing ball 42 is impacted, the energy-absorbing ball 42 can transmit force in multiple directions. For example, when the energy-absorbing ball 42 is impacted in the front, the energy-absorbing ball 42 can transmit the front impact force to the side. Furthermore, the energy-absorbing ball 42 can absorb the impact force by deforming under pressure, which is beneficial to further improve the energy absorption capacity of the first energy-absorbing structure 30.

[0139] According to some embodiments of this application, as shown in Figures 7 and 8, the second energy-absorbing structure 40 includes an energy-absorbing tube 41 that extends along the arrangement direction of the mounting chamber 11 and the first energy-absorbing structure 30.

[0140] Among them, the energy-absorbing tube 41 is a strip structure, and the energy-absorbing tube 41 can be a straight tube. The energy-absorbing tube 41 extends along the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30.

[0141] In the above technical solution, the energy-absorbing tube 41 extends along the arrangement direction of the mounting chamber 11 and the first energy-absorbing structure 30. When the energy-absorbing tube 41 is impacted, it helps to improve the deformation resistance of the second energy-absorbing structure 40, reduces the deformation risk of the second energy-absorbing structure 40, and also improves the energy absorption capacity of the second energy-absorbing structure 40, thereby reducing the risk of the box 10 being concave and thus reducing the risk of the battery cell 20 being squeezed.

[0142] According to some embodiments of this application, as shown in FIG6, a plurality of second energy-absorbing structures 40 are provided, and the plurality of second energy-absorbing structures 40 are arranged to form at least one second energy-absorbing structure layer 43. The second energy-absorbing structure layer 43 is perpendicular to the arrangement direction of the mounting chamber 11 and the first energy-absorbing structure 30. At least one sub-mounting space 34 is provided with the second energy-absorbing structure layer 43. Along the width direction of the second energy-absorbing structure layer 43, the ratio of the width dimension of the second energy-absorbing structure layer 43 to the width dimension of the corresponding sub-mounting space 34 is greater than or equal to 0.5 and less than or equal to 1; and / or

[0143] Along the height direction of the second energy-absorbing structure layer 43, the ratio of the height dimension of the second energy-absorbing structure layer 43 to the height dimension of the corresponding sub-installation space 34 is greater than or equal to 0.5 and less than or equal to 1. The width direction of the second energy-absorbing structure layer 43, the height direction of the second energy-absorbing structure layer 43, and the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30 are all perpendicular to each other.

[0144] The first energy-absorbing structure 30 defines an installation space 32. Within the installation space 32, a partition structure 33 divides the installation space 32 into multiple sub-installation spaces 34. At least one sub-installation space 34 contains a second energy-absorbing structure layer 43. Taking the installation compartment 11 with the first energy-absorbing structure 30 on the front side as an example, along the width direction of the battery device 100, the width dimension of the second energy-absorbing structure layer 43 is D1, and the width dimension of the corresponding sub-installation space 34 is D2. The units of the width dimensions of the second energy-absorbing structure layer 43 and the corresponding sub-installation space 34 can be reasonably selected and set according to actual conditions. The units of the width dimensions of the second energy-absorbing structure layer 43 and the corresponding sub-installation space 34 are the same. The relationship 0.5≤D1 / D2≤1 is satisfied. The ratio of the width dimension of the second energy-absorbing structure layer 43 to the width dimension of the corresponding sub-installation space 34 can be 0.5, 0.6, 0.7, 0.99, 1, etc. It should be noted that the width direction of the second energy-absorbing structure layer 43 is perpendicular to the height direction of the battery device 100, and the width direction of the second energy-absorbing structure layer 43 is perpendicular to the arrangement direction of the first energy-absorbing structure 30 and the mounting compartment 11. The height direction of the battery device 100 is perpendicular to the arrangement direction of the first energy-absorbing structure 30 and the mounting compartment 11. The width direction of the mounting space 32 is perpendicular to the height direction of the battery device 100, and the width direction of the mounting space 32 is perpendicular to the arrangement direction of the first energy-absorbing structure 30 and the mounting compartment 11. The height direction of the battery device 100 refers to the Z direction in Figure 5.

[0145] Taking the second energy-absorbing structure layer 43 as an example of being constructed as an energy-absorbing ball 42, the second energy-absorbing structure layer 43 may include N (N≥1, N is an integer) columns of energy-absorbing balls 44 arranged along the width dimension direction of the second energy-absorbing structure layer 43. Each column of energy-absorbing balls 44 includes at least one energy-absorbing ball 42. The diameter of the energy-absorbing ball 42 is d, and the width dimension of the second energy-absorbing structure layer 43 is N*d.

[0146] If the ratio of the width of the second energy-absorbing structural layer 43 to the width of the corresponding sub-mounting space 34 is less than 0.5, the distance between the second energy-absorbing structural layer 43 and the inner wall of the sub-mounting space 34 will be large along the width direction of the second energy-absorbing structural layer 43. This will cause the second energy-absorbing structural layer 43 to move extensively within the corresponding sub-mounting space 34, potentially leading to the second energy-absorbing structure 40 impacting the first energy-absorbing structure 30 and generating noise. Furthermore, when the first energy-absorbing structure 30 is impacted, the large distance between the second energy-absorbing structural layer 43 and the inner wall of the sub-mounting space 34 will prevent the second energy-absorbing structure 40 from being compressed, thus affecting the energy absorption of the energy-absorbing ball 42. If the ratio of the width of the second energy-absorbing structural layer 43 to the width of the corresponding sub-mounting space 34 is greater than 1, the second energy-absorbing structural layer 43 cannot be assembled within the corresponding sub-mounting space 34.

[0147] In the above technical solution, by ensuring that the ratio of the width of the second energy-absorbing structure layer 43 to the width of the corresponding sub-mounting space 34 is greater than or equal to 0.5 and less than or equal to 1, the distance between the second energy-absorbing structure layer 43 and the inner wall of the sub-mounting space 34 can be appropriately spaced along the width direction of the second energy-absorbing structure layer 43. This limits the range of motion of the second energy-absorbing structure 40, reduces the noise generated by the second energy-absorbing structure 40 impacting the first energy-absorbing structure 30, and facilitates the deformation and compression of the second energy-absorbing structure 40 when the first energy-absorbing structure 30 is impacted, thereby enabling the second energy-absorbing structure 40 to participate in energy absorption, further reducing the risk of the battery cell 20 being compressed. At the same time, it also facilitates the installation of the second energy-absorbing structure layer 43 within the corresponding sub-mounting space 34.

[0148] According to some embodiments of this application, as shown in FIG6, a first energy-absorbing structure 30 defines an installation space 32. A partition structure 33 is provided in the installation space 32 to divide the installation space 32 into a plurality of sub-installation spaces 34. At least one sub-installation space 34 is provided with a second energy-absorbing structure 40. The ratio of the height dimension of the second energy-absorbing structure layer 43 to the height dimension of the sub-installation space 34 is greater than or equal to 0.5 and less than or equal to 1.

[0149] The first energy-absorbing structure 30 defines an installation space 32. Within the installation space 32, a partition structure 33 divides the installation space 32 into multiple sub-installation spaces 34. At least one sub-installation space 34 contains a second energy-absorbing structure layer 43. Taking the first energy-absorbing structure 30 located on the front side of the installation compartment 11 as an example, along the height direction of the battery device 100, the height dimension of the second energy-absorbing structure layer 43 is D3, and the height dimension of the corresponding sub-installation space 34 is D4. The units of the height dimensions of the second energy-absorbing structure layer 43 and the corresponding sub-installation space 34 can be reasonably selected and set according to actual conditions. The units of the height dimensions of the second energy-absorbing structure layer 43 and the corresponding sub-installation space 34 are the same, satisfying the relationship: 0.5 ≤ D3 / D4 ≤ 1. The ratio of the height dimension of the second energy-absorbing structure layer 43 to the height dimension of the corresponding sub-installation space 34 can be values ​​such as 0.5, 0.6, 0.7, 0.99, and 1.

[0150] Taking the second energy-absorbing structure layer 43 as an example of being constructed as an energy-absorbing ball 42, the second energy-absorbing structure layer 43 may include N (N≥1, N is an integer) columns of energy-absorbing balls 44 arranged along the width dimension of the second energy-absorbing structure layer 43. Each column of energy-absorbing balls 44 includes M (M≥1, M is an integer) energy-absorbing balls 42. The diameter of the energy-absorbing ball 42 is d, and the height dimension of the second energy-absorbing structure layer 43 is M*d.

[0151] If the ratio of the height dimension of the second energy-absorbing structural layer 43 to the height dimension of the corresponding sub-mounting space 34 is less than 0.5, the distance between the second energy-absorbing structural layer 43 and the inner wall of the sub-mounting space 34 is relatively large along the height dimension direction of the second energy-absorbing structural layer 43, i.e., along the height direction of the battery device 100. This makes it easy for the second energy-absorbing structural layer 43 to move extensively within the corresponding sub-mounting space 34, potentially causing the second energy-absorbing structure 40 to collide with the first energy-absorbing structure 30 and generate noise. Furthermore, when the first energy-absorbing structure 30 is impacted, the large distance between the second energy-absorbing structural layer 43 and the inner wall of the sub-mounting space 34 makes it less likely to be compressed, thus affecting the energy absorption of the second energy-absorbing structure 40. If the ratio of the height dimension of the second energy-absorbing structural layer 43 to the height dimension of the corresponding sub-mounting space 34 is greater than 1, the second energy-absorbing structural layer 43 cannot be installed within the corresponding sub-mounting space 34.

[0152] In the above technical solution, by ensuring that the ratio of the height dimension of the second energy-absorbing structure layer 43 to the height dimension of the corresponding sub-installation space 34 is greater than or equal to 0.5 and less than or equal to 1, the distance between the second energy-absorbing structure layer 43 and the inner wall of the sub-installation space 34 can be appropriate along the height dimension direction of the second energy-absorbing structure layer 43. This can limit the movement range of the second energy-absorbing structure 40, reduce the noise generated by the second energy-absorbing structure 40 impacting the first energy-absorbing structure 30, and facilitate the deformation and compression of the second energy-absorbing structure 40 when the first energy-absorbing structure 30 is impacted, thereby enabling the second energy-absorbing structure 40 to participate in energy absorption and further reducing the risk of the battery cell 20 being compressed. At the same time, when the first energy-absorbing structure 30 is impacted, there is sufficient space between the second energy-absorbing structure layer 43 and the inner wall of the sub-installation space 34 for the first energy-absorbing structure 30 to deform, which is beneficial for the first energy-absorbing structure 30 to deform and absorb energy, and also facilitates the installation of the second energy-absorbing structure layer 43 in the corresponding sub-installation space 34.

[0153] According to some embodiments of this application, a filling structure may be provided in the sub-installation space 34 where the energy-absorbing ball 42 is provided. The filling structure is located between any two adjacent second energy-absorbing structures 40, or between the second energy-absorbing structure 40 and the inner wall of the sub-installation space 34. The filling structure may be foam, rubber, sponge, etc. The filling structure can fix the second energy-absorbing structure 40, reduce the risk of noise generated by the second energy-absorbing structure 40 hitting the first energy-absorbing structure 30, and the filling structure also has an energy-absorbing function, further improving the energy absorption performance of the first energy-absorbing structure 30.

[0154] According to some embodiments of this application, as shown in FIG2, the first energy-absorbing structure 30 is located outside the housing 10.

[0155] The first energy-absorbing structure 30 is located on the outside of the housing 10. When the battery device 100 is impacted, the first energy-absorbing structure 30 is impacted before the housing 10. The first energy-absorbing structure 30 can absorb energy first, reduce the force on the housing 10, reduce the risk of deformation of the housing 10, and further reduce the risk of the battery cell 20 being squeezed.

[0156] According to some embodiments of this application, as shown in FIG2, the box body 10 includes a plurality of side beams 50, which are connected to form an installation chamber 11, and at least one side beam 50 is provided with a first energy-absorbing structure 30.

[0157] The housing 10 may include multiple side beams 50, which are the side beams of the housing 10. The housing 10 may include two, three, four, five, six, or other numbers of side beams 50. The multiple side beams 50 are connected in sequence to form an installation compartment 11, and the multiple side beams 50 form an installation compartment 11 for installing battery cells 20. This application describes the housing 10 with four side beams 50 as an example. The four side beams 50 are the front side beam 50, rear side beam 50, left side beam 50, and right side beam 50 of the housing 10. At least one side beam 50 is provided with a first energy-absorbing structure 30. It can also be understood that one side beam 50 may be provided with a first energy-absorbing structure 30, or multiple side beams 50 may be provided with a first energy-absorbing structure 30, or each side beam 50 may be provided with a first energy-absorbing structure 30. The first energy-absorbing structure 30 is fixedly connected to the corresponding side beam 50. The first energy-absorbing structure 30 can be installed to the corresponding side beam 50 by bolts, adhesive, or a universal adapter. At least one of the front, rear, left, and right sides of the installation chamber 11 is provided with the first energy-absorbing structure 30. The first energy-absorbing structure 30 can be located inside or outside the corresponding side beam 50. This application uses the example of the front side of the installation chamber 11 having the first energy-absorbing structure 30 as an example.

[0158] In the above technical solution, the housing 10 includes multiple side beams 50 to realize the arrangement of the installation compartment 11. At least one side beam 50 is provided with a first energy-absorbing structure 30, which can make the first energy-absorbing structure 30 reasonably positioned. When the vehicle 200 is involved in a collision, the first energy-absorbing structure 30 can absorb energy. Furthermore, the battery device 100 can have an energy-absorbing effect in at least one direction where the first energy-absorbing structure 30 is provided, thereby improving the collision safety of the battery device 100 in at least one direction, further improving the reliability of the battery device 100, and thus further improving the reliability of the vehicle 200. This is more conducive to solving the reliability problem of the battery device 100 when the vehicle 200 is driving at high speed.

[0159] According to some embodiments of this application, as shown in FIG2, at least a portion of the first energy-absorbing structure 30 is located in the middle region of the corresponding side beam 50 along the length direction of the side beam 50 provided with the first energy-absorbing structure 30.

[0160] In this context, "along the length direction of the side beam 50 with the first energy-absorbing structure 30" can also be understood as "along the extension direction of the side beam 50 with the first energy-absorbing structure 30," the side beam 50 with the first energy-absorbing structure 30 has a midline, and at least a portion of the first energy-absorbing structure 30 is located in the middle region of the corresponding side beam 50. The first energy-absorbing structure 30 can be partially located in the middle region of the corresponding side beam 50, or the first energy-absorbing structure 30 can be entirely located in the middle region of the corresponding side beam 50. The middle region refers to the area covered by a certain distance on both sides of the midline of the side beam 50 along the length direction of the side beam 50. As an example, the middle region refers to the area covered by a length of 50cm on both sides of the midline of the side beam 50 along the length direction of the side beam 50.

[0161] When the side beam 50 with the first energy-absorbing structure 30 extends along the width direction of the battery device 100, at least a portion of the first energy-absorbing structure 30 is located in the middle region of the battery device 100 along the width direction. When the side beam 50 with the first energy-absorbing structure 30 extends along the length direction of the battery device 100, at least a portion of the first energy-absorbing structure 30 is located in the middle region of the battery device 100 along the length direction. This application uses the example of the front side beam 50 of the mounting compartment 11 having the first energy-absorbing structure 30 as an example for explanation.

[0162] In the above technical solution, by at least a portion of the first energy-absorbing structure 30 being disposed in the middle area of ​​the corresponding side beam 50, the first energy-absorbing structure 30 can cover the middle area of ​​the side beam 50. Taking the front side beam 50 of the mounting compartment 11 as an example, when the vehicle 200 is involved in a frontal collision, rear collision, or offset collision, the first energy-absorbing structure 30 can absorb the collision force to a greater extent after being impacted, which can further reduce the force on the battery device 100, thereby further reducing the force on the battery cells 20 inside the battery device 100, further reducing the risk of deformation and damage to the battery cells 20, further improving the reliability of the battery device 100, and thus further improving the reliability of the vehicle 200. This is more conducive to solving the reliability problem of the battery device 100 when the vehicle 200 is driving at high speed.

[0163] According to some embodiments of this application, as shown in FIG2, along the arrangement direction of the first energy-absorbing structure 30 and the mounting chamber 11, the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 have overlapping areas.

[0164] Along the arrangement direction of the corresponding first energy-absorbing structure 30 and the mounting compartment 11, the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 overlap in an area. The orthographic projections of the first energy-absorbing structure 30 and the corresponding side beam 50 may partially overlap, or they may completely overlap. In this case, the orthographic projection area of ​​the first energy-absorbing structure 30 may be less than or equal to the orthographic projection area of ​​the corresponding side beam 50. When the side beam 50 of the first energy-absorbing structure 30 extends along the width direction of the battery device 100, the orthographic projections of the first energy-absorbing structure 30 and the corresponding side beam 50 overlap along the length direction of the battery device 100. When the side beam 50 of the first energy-absorbing structure 30 extends along the length direction of the battery device 100, the orthographic projections of the first energy-absorbing structure 30 and the corresponding side beam 50 overlap along the width direction of the battery device 100.

[0165] In the above technical solution, along the arrangement direction of the corresponding first energy-absorbing structure 30 and the mounting compartment 11, the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 have an overlapping area. The side beam 50 can reliably support the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40, which is beneficial to improving the supporting effect of the side beam 50 on the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40, and improving the stability of the first energy-absorbing structure 30 and the second energy-absorbing structure 40 when subjected to external force collision. Furthermore, the first energy-absorbing structure 30 can abut against the corresponding side beam 50 when subjected to external force collision, and the second energy-absorbing structure 40 can also abut against the corresponding side beam 50, which is beneficial to improving the force transmission performance between the first energy-absorbing structure 30 and the corresponding side beam 50, and between the second energy-absorbing structure 40 and the corresponding side beam 50. Part of the collision force can be transferred to the side beam 50, and the collision force can be transferred along the side beam 50 and the chassis of the vehicle 200 to other structural components of the vehicle 200, so that the collision force is dispersed and the risk of concentrated force is reduced. In addition, when the vehicle 200 is involved in a collision, the first energy-absorbing structure 30 and the second energy-absorbing structure 40 can be subjected to force preferentially over the corresponding side beam 50, which is more conducive to reducing the force on the side beam 50, further reducing the risk of deformation of the corresponding side beam 50, and further reducing the force on the battery cell 20 in the battery device 100.

[0166] According to some embodiments of this application, as shown in FIG2, along the arrangement direction of the first energy-absorbing structure 30 and the mounting chamber 11, the area of ​​the orthographic projection of the first energy-absorbing structure 30 is S1, and the area of ​​the overlapping region of the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 is S2, satisfying: 10% ≤ S2 / S1 ≤ 100%.

[0167] Along the arrangement direction of the first energy-absorbing structure 30 and the mounting chamber 11, the area of ​​the orthographic projection of the first energy-absorbing structure 30 is S1, and the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 is S2. The unit of the area of ​​the orthographic projection of the first energy-absorbing structure 30 can be reasonably selected and designed according to the actual situation, and the unit of the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 can be reasonably selected and designed according to the actual situation. S2 / S1 can be values ​​such as 10%, 11%, 15%, 20%, 25%, 30%, 40%, 43%, 45%, 50%, 55%, 60%, 61%, 70%, 80%, 90%, 93%, 95%, 100%, etc.

[0168] When S2 / S1 is less than 10%, the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 is small. When the first energy-absorbing structure 30 is impacted, the force transmission performance between the first energy-absorbing structure 30 and the corresponding side beam 50 is poor. The supporting effect of the side beam 50 on the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40 is poor. The stability of the first energy-absorbing structure 30 and the second energy-absorbing structure 40 is poor when impacted by external forces. Furthermore, when the vehicle 200 is involved in a collision, the side beam 50 may be subjected to force preferentially over the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40. Therefore, by ensuring that the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 is appropriate (10% ≤ S2 / S1 ≤ 100%), the first energy-absorbing structure 30 and the second energy-absorbing structure 40 are subjected to collision force. This is more conducive to improving the force transmission performance between the corresponding side beam 50 and the first energy-absorbing structure 30 and the second energy-absorbing structure 40. The side beam 50 can more reliably support the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40, which is more conducive to improving the supporting effect of the side beam 50 on the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40. This further improves the stability of the first energy-absorbing structure 30 and the second energy-absorbing structure 40 when subjected to external force collision. Furthermore, when the vehicle 200 collides, the first energy-absorbing structure 30 and the second energy-absorbing structure 40 are preferentially subjected to force over the corresponding side beam 50, which is more conducive to reducing the force on the side beam 50, further reducing the risk of deformation of the corresponding side beam 50, and further reducing the force on the battery cells 20 in the battery device 100.

[0169] In the above technical solution, by using 10%≤S2 / S1≤100%, the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure 30 and the orthographic projection of the corresponding side beam 50 is appropriate. When the first energy-absorbing structure 30 is subjected to collision force, it is more conducive to improving the force transmission performance between the side beam 50 and the first energy-absorbing structure 30 and the second energy-absorbing structure 40. The side beam 50 can more reliably support the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40, which is more conducive to improving the supporting role of the side beam 50 on the corresponding first energy-absorbing structure 30 and the second energy-absorbing structure 40, further improving the stability of the first energy-absorbing structure 30 and the second energy-absorbing structure 40 when subjected to external force collision. Furthermore, when the vehicle 200 is involved in a collision, it is more conducive to the first energy-absorbing structure 30 and the second energy-absorbing structure 40 being subjected to force preferentially over the corresponding side beam 50, thereby further reducing the force on the side beam 50, further reducing the risk of deformation of the corresponding side beam 50 under force, and further reducing the force on the battery cell 20 in the battery device 100.

[0170] According to some embodiments of this application, as shown in FIG5, along the arrangement direction of the first energy-absorbing structure 30 and the mounting chamber 11, the orthographic projection of the second energy-absorbing structure 40 and the orthographic projection of the corresponding side beam 50 have overlapping areas.

[0171] Along the arrangement direction of the corresponding first energy-absorbing structure 30 and the mounting chamber 11, the orthographic projection of the second energy-absorbing structure 40 and the orthographic projection of the corresponding side beam 50 overlap in an area. The orthographic projections of the second energy-absorbing structure 40 and the corresponding side beam 50 may partially overlap, or they may completely overlap. In this case, the orthographic projection area of ​​the second energy-absorbing structure 40 may be less than or equal to the orthographic projection area of ​​the corresponding side beam 50. When the side beam 50 of the first energy-absorbing structure 30 extends along the width direction of the battery device 100, the orthographic projections of the second energy-absorbing structure 40 and the corresponding side beam 50 overlap along the length direction of the battery device 100. When the side beam 50 of the first energy-absorbing structure 30 extends along the length direction of the battery device 100, the orthographic projections of the second energy-absorbing structure 40 and the corresponding side beam 50 overlap along the width direction of the battery device 100.

[0172] In the above technical solution, along the arrangement direction of the corresponding first energy-absorbing structure 30 and the mounting compartment 11, the orthographic projection of the second energy-absorbing structure 40 and the orthographic projection of the corresponding side beam 50 overlap. The side beam 50 can reliably support the corresponding second energy-absorbing structure 40, which is beneficial to improving the supporting effect of the side beam 50 on the corresponding second energy-absorbing structure 40 and improving the stability of the first energy-absorbing structure 30 and the second energy-absorbing structure 40 when subjected to external force collision. Furthermore, when subjected to external force collision, the second energy-absorbing structure 40 can abut against the corresponding side beam 50, which is beneficial to improving the force transmission performance between the second energy-absorbing structure 40 and the corresponding side beam 50. It can transfer part of the collision force to the side beam 50, and the collision force can be transferred along the side beam 50 and the chassis of the vehicle 200 to other structural components of the vehicle 200, so that the collision force is dispersed and the risk of concentrated force is reduced. In addition, when the vehicle 200 is involved in a collision, the second energy-absorbing structure 40 can be subjected to force preferentially over the corresponding side beam 50, which is more conducive to reducing the force on the side beam 50, further reducing the risk of deformation of the corresponding side beam 50, and further reducing the force on the battery cell 20 in the battery device 100.

[0173] According to some embodiments of this application, as shown in FIG2, the plurality of side beams 50 include: two first side beams 51 and two second side beams 52. The two first side beams 51 are arranged opposite to each other and spaced apart along the length direction of the battery device 100, and the two second side beams 52 are arranged opposite to each other and spaced apart along the width direction of the battery device 100. At least one of the two first side beams 51 is provided with a first energy absorption structure 30.

[0174] The plurality of side beams 50 includes two first side beams 51 and two second side beams 52. The two first side beams 51 extend along the width direction of the battery device 100, and the two second side beams 52 extend along the length direction of the battery device 100. The two first side beams 51 are arranged opposite to each other and spaced apart along the length direction of the battery device 100. The spacing between the two first side beams 51 can be reasonably designed according to the dimensions of the installation compartment 11, and their orthographic projections can overlap along the length direction of the battery device 100. The two second side beams 52 are arranged opposite to each other and spaced apart along the width direction of the battery device 100. The spacing between the two second side beams 52 can be reasonably designed according to the dimensions of the installation compartment 11, and their orthographic projections can overlap along the width direction of the battery device 100. The two first side beams 51 and the two second side beams 52 can form the outer frame of the housing 10. Each first side beam 51 is fixedly connected to two second side beams 52. The first side beam 51 can be welded to the second side beam 52, or it can be connected to the second side beam 52 by bolts. At least one of the two first side beams 51 is provided with a first energy-absorbing structure 30. This can be understood as the first side beam 51 located at the front being provided with the first energy-absorbing structure 30, the first side beam 51 located at the rear being provided with the first energy-absorbing structure 30, or both first side beams 51 being provided with the first energy-absorbing structure 30. A side beam 50 provided with a first energy-absorbing structure 30 can be provided with multiple first energy-absorbing structures 30, and these multiple first energy-absorbing structures 30 can be arranged sequentially at intervals along the length direction of the corresponding side beam 50. This application uses the example of the first side beam 51 located at the front being provided with a first energy-absorbing structure 30 for illustration.

[0175] In the above technical solution, by setting two first side beams 51 and two second side beams 52, the effect of forming the installation compartment 11 can be achieved, and the structure of the box 10 can be simplified, making the production and manufacturing of the box 10 easier. Furthermore, by providing a first energy-absorbing structure 30 in at least one of the two first side beams 51, the first energy-absorbing structure 30 can absorb at least part of the impact force. The impact force not absorbed by the first energy-absorbing structure 30 can be transferred to the first side beam 51, and then to the two second side beams 52. The impact force can be transferred along the side beams 50 to the box 10 and other structural components of the vehicle 200, thus dispersing the impact force, reducing the risk of concentrated force, further reducing the force on the battery cells 20 inside the battery device 100, further reducing the risk of squeezing the battery cells 20 inside the battery device 100, further reducing the risk of deformation and damage to the battery cells 20 inside the battery device 100, further improving the reliability of the battery device 100, and thus further improving the reliability of the vehicle 200.

[0176] According to some embodiments of this application, as shown in FIG2, the installation chamber 11 is provided with a partition beam 60 to divide the installation chamber 11 into an energy chamber 111 and a buffer chamber 112. The energy chamber 111 contains a plurality of battery cells 20, and at least one first energy-absorbing structure 30 and the energy chamber 111 are connected by a buffer chamber 112.

[0177] The installation chamber 11 may be equipped with a partition beam 60, which divides the installation chamber 11 into an energy chamber 111 and a buffer chamber 112. The energy chamber 111 and the buffer chamber 112 are adjacent to each other. Multiple battery cells 20 are disposed within the energy chamber 111. There is at least one buffer chamber 112, and at least one first energy-absorbing structure 30 is located between the energy chamber 111 and the energy chamber 112. As an example, when there is one buffer chamber 112, a buffer chamber 112 is disposed between one first energy-absorbing structure 30 and the energy chamber 111. As another example, when there are multiple buffer chambers 112, each buffer chamber 112 is located between one first energy-absorbing structure 30 and the energy chamber 111. As yet another example, when there are multiple buffer chambers 112, there are multiple first energy-absorbing structures 30, and the multiple buffer chambers 112 are respectively located between multiple first energy-absorbing structures 30 and the energy chamber 111, with each buffer chamber 112 corresponding to one of the multiple first energy-absorbing structures 30. As another example, when there are multiple buffer chambers 112, there are multiple first energy-absorbing structures 30. The multiple buffer chambers 112 are respectively located between multiple first energy-absorbing structures 30 and energy chambers 111, and at least one first energy-absorbing structure 30 and energy chamber 111 are provided with multiple buffer chambers 112. This application uses the example of having one first energy-absorbing structure 30 and one buffer chamber 112 between the first energy-absorbing structure 30 and energy chamber 111 for illustration. It should be noted that the buffer chamber 112 is defined by the partition beam 60 and multiple side beams 50. The shape of the buffer chamber 112 can be reasonably selected and designed according to the actual situation, and is not specifically limited here. The shape of the partition beam 60 can be specifically designed according to the shape of the buffer chamber 112.

[0178] In the above technical solution, a buffer chamber 112 is provided between at least one first energy-absorbing structure 30 and the energy chamber 111. The buffer chamber 112 provides space for the side beam 50 to collapse and has a buffering effect. When the corresponding side beam 50 with the first energy-absorbing structure 30 is deformed by the collision force, the corresponding side beam 50 can collapse and deform toward the buffer chamber 112, reducing the risk of the side beam 50 deforming and squeezing the battery cell 20, further reducing the risk of deformation and damage of the battery cell 20, further improving the reliability of the battery device 100, thereby further improving the reliability of the vehicle 200, and more effectively solving the reliability problem of the battery device 100 when the vehicle 200 is driving at high speed.

[0179] According to some embodiments of this application, as shown in FIG2, the energy chamber 111 and the buffer chamber 112 are arranged along the length of the battery device 100.

[0180] The partition beam 60 extends along the width of the battery device 100. Both ends of the partition beam 60 are fixedly connected to corresponding side beams 50. The partition beam 60 is spaced apart from both the front and rear side beams 50. A buffer chamber 112 is formed between the partition beam 60 and the front side beam 50, and an energy chamber 111 is formed between the partition beam 60 and the rear side beam 50. Alternatively, a buffer chamber 112 is formed between the partition beam 60 and the rear side beam 50, and an energy chamber 111 is formed between the partition beam 60 and the front side beam 50. When buffer chambers 112 are provided on both sides of the energy chamber 111 along the length of the battery device 100, there can be two partition beams 60. The two partition beams 60 are arranged at intervals along the length of the battery device 100, and an energy chamber 111 is formed between the two partition beams 60. A buffer chamber 112 is formed between one partition beam 60 and the side beam 50 located on the front side, and a buffer chamber 112 is formed between the other partition beam 60 and the side beam 50 located on the rear side.

[0181] Taking multiple side beams 50, including two first side beams 51 and two second side beams 52, as an example, the two ends of the partition beam 60 are fixedly connected to the two second side beams 52 respectively, and the partition beam 60 is spaced apart from the two first side beams 51. When the first side beam 51 located on the front side is provided with the first energy-absorbing structure 30, the partition beam 60 is spaced apart from the first side beam 51 located on the front side to form a buffer chamber 112, and the partition beam 60 is spaced apart from the first side beam 51 located on the rear side to form an energy chamber 111. When the first side beam 51 located on the rear side is provided with the first energy-absorbing structure 30, the partition beam 60 is spaced apart from the first side beam 51 located on the rear side to form a buffer chamber 112, and the partition beam 60 is spaced apart from the first side beam 51 located on the front side to form an energy chamber 111. When both first side beams 51 are provided with first energy-absorbing structures 30, there can be two partition beams 60. The two partition beams 60 are arranged at intervals along the length of the battery device 100. An energy chamber 111 is formed between the two partition beams 60. A buffer chamber 112 is formed between one partition beam 60 and the first side beam 51 located on the front side, and a buffer chamber 112 is formed between the other partition beam 60 and the first side beam 51 located on the rear side.

[0182] In the above technical solution, the energy compartment 111 and the buffer compartment 112 are arranged along the length of the battery device 100. When the battery device 100 is subjected to a collision force or an offset collision force along the length of the battery device 100, the buffer compartment 112 can effectively provide a crumple space for the deformation of the corresponding side beam 50, effectively reducing the risk of the side beam 50 deforming and squeezing the battery cell 20, further reducing the risk of deformation and damage of the battery cell 20, further improving the reliability of the battery device 100, thereby further improving the reliability of the vehicle 200, and more conducive to solving the reliability problem of the battery device 100 when the vehicle 200 is driving at high speed, thus making the arrangement of the energy compartment 111 and the buffer compartment 112 reasonable.

[0183] According to some embodiments of this application, as shown in FIG2, the plurality of side beams 50 include: two first side beams 51 and two second side beams 52. The two first side beams 51 are arranged opposite to each other and spaced apart along the length direction of the battery device 100, and the two second side beams 52 are arranged opposite to each other and spaced apart along the width direction of the battery device 100. A partition beam 60 extends along the width direction of the battery device 100 and connects between the two second side beams 52. The partition beam 60 is spaced apart from both first side beams 51 so that an energy chamber 111 is formed between the partition beam 60 and one first side beam 51, and a buffer chamber 112 is formed between the partition beam 60 and the other first side beam 51.

[0184] The plurality of side beams 50 may include two first side beams 51 and two second side beams 52. Both first side beams 51 extend along the width direction of the battery device 100, and both second side beams 52 extend along the length direction of the battery device 100. The two first side beams 51 are arranged opposite to each other and spaced apart along the length direction of the battery device 100. The spacing between the two first side beams 51 can be reasonably designed according to the dimensions of the installation compartment 11, and the orthographic projections of the two first side beams 51 may have overlapping areas along the length direction of the battery device 100. The two second side beams 52 are arranged opposite to each other and spaced apart along the width direction of the battery device 100. The spacing between the two second side beams 52 can be reasonably designed according to the dimensions of the installation compartment 11, and the orthographic projections of the two second side beams 52 may have overlapping areas along the width direction of the battery device 100. The two first side beams 51 and the two second side beams 52 can form the outer frame of the housing 10. Each first side beam 51 is fixedly connected to two second side beams 52. The first side beam 51 can be welded to the second side beam 52, or it can be bolted to the second side beam 52. At least one of the two first side beams 51 is provided with a first energy-absorbing structure 30. A partition beam 60 extends along the width direction of the battery device 100, and both ends of the partition beam 60 are fixedly connected to the two second side beams 52 respectively. Along the length direction of the battery device 100, the partition beam 60 is spaced apart from the two first side beams 51. An energy chamber 111 can be formed between the partition beam 60 and one first side beam 51, and a buffer chamber 112 can be formed between the partition beam 60 and the other first side beam 51. As an example, the first side beam 51 located on the front side is provided with the first energy-absorbing structure 30, an energy chamber 111 is formed between the partition beam 60 and the first side beam 51 located on the rear side, and a buffer chamber 112 is formed between the partition beam 60 and the first side beam 51 located on the front side. As another example, the first side beam 51 located on the rear side is provided with a first energy-absorbing structure 30, an energy chamber 111 is formed between the partition beam 60 and the first side beam 51 located on the front side, and a buffer chamber 112 is formed between the partition beam 60 and the first side beam 51 located on the rear side.

[0185] In the above technical solution, the partition beam 60 extends along the width direction of the battery device 100 and connects between the two second side beams 52. The partition beam 60 is spaced apart from the two first side beams 51. An energy chamber 111 can be formed between the partition beam 60 and one first side beam 51, or a buffer chamber 112 can be formed between the partition beam 60 and the other first side beam 51, so as to achieve the effect of arranging the energy chamber 111 and the buffer chamber 112 along the length direction of the battery device 100.

[0186] According to some embodiments of this application, as shown in FIG11, the battery device 100 further includes a third energy-absorbing structure 70, which is disposed in the buffer chamber 112.

[0187] The battery device 100 may further include a third energy-absorbing structure 70, which is disposed within the buffer chamber 112. The third energy-absorbing structure 70 may be fixedly connected to the partition beam 60, or to at least one side beam 50. Alternatively, the third energy-absorbing structure 70 may be fixedly connected to both the partition beam 60 and at least one side beam 50. The third energy-absorbing structure 70 has an energy-absorbing function. The third energy-absorbing structure 70 may include an energy-absorbing box, an energy-absorbing space, a buffer frame, etc. Along the arrangement direction of the energy chambers 111 and the buffer chamber 112, the orthographic projection of the third energy-absorbing structure 70 overlaps with the orthographic projection of the partition beam 60, or the orthographic projection of the third energy-absorbing structure 70 overlaps with the orthographic projection of the corresponding side beam 50, or the orthographic projection of the third energy-absorbing structure 70 overlaps with both the orthographic projection of the partition beam 60 and the orthographic projection of the corresponding side beam 50. Furthermore, along the arrangement direction of the energy chamber 111 and the buffer chamber 112, the third energy-absorbing structure 70 is located between the first energy-absorbing structure 30 and the energy chamber 111.

[0188] In the above technical solution, by placing the third energy-absorbing structure 70 inside the buffer compartment 112, the third energy-absorbing structure 70 has an energy-absorbing function, enabling the housing 10 to have a multi-level energy-absorbing effect. After the first energy-absorbing structure 30 is impacted, the first energy-absorbing structure 30 and the second energy-absorbing structure 40 can absorb at least part of the impact force. The unabsorbed impact force can be transferred to the corresponding side beam 5012. After the corresponding side beam 50 deforms, it can squeeze the third energy-absorbing structure 70. The third energy-absorbing structure 70 further absorbs the impact force, reduces the compression of the battery cell 20 during the impact, further reduces the force on the battery cell 20 inside the battery device 100, further reduces the risk of deformation and damage of the battery cell 20 inside the battery device 100, further improves the reliability of the battery device 100, and thus further improves the reliability of the vehicle 200.

[0189] According to some embodiments of this application, the third energy-absorbing structure 70 includes at least one of an energy-absorbing box, a buffer frame, a spring, and an airbag.

[0190] The third energy-absorbing structure 70 may include at least one of an energy-absorbing box, a buffer frame, a spring, and an airbag. That is, the third energy-absorbing structure 70 may include one of the energy-absorbing box, the buffer frame, the spring, and the airbag, or the third energy-absorbing structure 70 may include any two of the energy-absorbing box, the buffer frame, the spring, and the airbag, or the third energy-absorbing structure 70 may include any three of the energy-absorbing box, the buffer frame, the spring, and the airbag, or the third energy-absorbing structure 70 may include any four of the energy-absorbing box, the buffer frame, the spring, and the airbag.

[0191] According to some embodiments of this application, the energy-absorbing box may have a hollow cavity that extends through the energy-absorbing box along the length of the battery device 100. There may be multiple hollow cavities, which may be parallel to each other. The cross-sectional shape of the hollow cavity may be square, rectangular, circular, rhomboid, polygonal, etc. The energy-absorbing box material may be made of high-ductility aluminum alloy. The cross-sectional shape of the hollow cavity may be square. The cross-sectional shape of the hollow cavity may also be rectangular. The cross-sectional shape of the hollow cavity may also be circular. The cross-sectional shape of the hollow cavity may also be regular hexagonal. Alternatively, at least part of the hollow cavity may have a rhomboid cross-sectional shape.

[0192] According to some embodiments of this application, a buffer frame encloses and forms a buffer cavity. The buffer cavity is formed by the buffer frame; in other words, the buffer frame defines the buffer cavity. As an example, the buffer cavity may be located inside the buffer frame. As another example, the buffer cavity has at least one open end. The buffer frame may be a separately configured frame structure. The buffer frame may also have at least a portion of its structure formed by the housing 10.

[0193] According to some embodiments of this application, the third energy-absorbing structure 70 is constructed as an airbag. As an example, the airbag is similar to the safety airbag on the vehicle 200. Initially, the airbag is not filled with gas, which will not be described in detail here. As another example, the airbag is an inflated bag.

[0194] In the above technical solution, by including at least one of the energy-absorbing box, buffer frame, spring and airbag in the third energy-absorbing structure 70, the third energy-absorbing structure 70 can have energy-absorbing performance, thereby meeting the working requirements of the third energy-absorbing structure 70 and improving the energy absorption effect of the third energy-absorbing structure 70. After being impacted, the third energy-absorbing structure 70 can absorb more impact force, which can further reduce the force on the battery cell 20.

[0195] According to some embodiments of this application, as shown in FIG11, the third energy-absorbing structure 70 is fixedly connected to at least one of the partition beam 60 and the side beam 50 of the box body 10.

[0196] The third energy-absorbing structure 70 is fixedly connected to the partition beam 6013, or the third energy-absorbing structure 70 is fixedly connected to the side beam 50 of the box body 10, or the third energy-absorbing structure 70 is fixedly connected to both the partition beam 60 and the side beam 50 of the box body 10.

[0197] In the above technical solution, by fixing the third energy-absorbing structure 70 to at least one of the partition beam 60 and the side beam 50 of the box body 10, the third energy-absorbing structure 70 can be fixed in the buffer chamber 112, reducing the risk of the third energy-absorbing structure 70 moving in the buffer chamber 112, so that the third energy-absorbing structure 70 can reliably correspond to the corresponding first energy-absorbing structure 30, and when the first energy-absorbing structure 30 is subjected to a collision force, the third energy-absorbing structure 70 can absorb energy under the force.

[0198] According to some embodiments of this application, as shown in FIG2, the battery device 100 may further include: an energy-absorbing beam 80, wherein the outer surface of at least one side beam 50 is provided with an energy-absorbing beam 80. As an example, the outer surface of at least one second side beam 52 is provided with an energy-absorbing beam 80. As another example, the outer surface of at least one first side beam 51 is provided with an energy-absorbing beam 80. As yet another example, the outer surface of at least one second side beam 52 is provided with an energy-absorbing beam 80, and the outer surface of at least one first side beam 51124 is provided with an energy-absorbing beam 80. By providing the energy-absorbing beam 80, the energy-absorbing beam 80 has an energy-absorbing function. When the energy-absorbing beam 80 is subjected to an impact force, the energy-absorbing beam 80 can absorb part of the impact force, further reducing the force on the battery cell 20. The specific structure of the energy-absorbing beam 80 is not specifically limited, as long as the energy-absorbing beam 80 can absorb energy.

[0199] According to some embodiments of this application, the housing 10 may include a first housing 12 and a second housing 13. The first housing 12 and the second housing 13 are fastened together, so that a closed installation compartment 11 is formed inside the housing 10. The first housing 12 may be located above the second housing 13, and the second housing 13 includes a plurality of side beams 50.

[0200] The electrical device according to the embodiments of this application includes the battery device 100 of the above embodiments. When the electrical device is involved in a collision, the first energy-absorbing structure 30, the second energy-absorbing structure 40, and the third energy-absorbing structure 70 can absorb the impact force. Compared with the prior art, this can reduce the force on the battery device 100, thereby reducing the force on the battery cells 20 within the battery device 100, reducing the risk of deformation and damage to the battery cells 20, improving the reliability of the battery device 100, and thus improving the reliability of the electrical device.

[0201] According to some embodiments of this application, referring to FIG2, this application provides a battery device 100, which includes a housing 10, a first energy-absorbing structure 30, and a second energy-absorbing structure 40. An installation compartment 11 is formed inside the housing 10, and the installation compartment 11 accommodates a plurality of battery cells 20. The housing 10 includes a plurality of side beams 50, which are connected to form the installation compartment 11. The plurality of side beams 50 include two first side beams 51 and two second side beams 52. The two first side beams 51 are arranged opposite to each other and spaced apart along the length direction of the battery device 100, and the two second side beams 52 are arranged opposite to each other and spaced apart along the width direction of the battery device 100. A partition beam 60 extends along the width direction of the battery device 100 and connects between the two second side beams 52. The partition beam 60 is spaced apart from both first side beams 51 to form a buffer compartment 112 between the partition beam 60 and the front first side beam 51, and an energy compartment 111 is formed between the partition beam 60 and the rear first side beam 51. The first side beam 51 on the front side is fixed with a first energy-absorbing structure 30. The first energy-absorbing structure 30 is located on the side of the first side beam 51 on the front side away from the buffer chamber 112. The second energy-absorbing structure 40 is disposed inside the first energy-absorbing structure 30.

[0202] Further, the first energy-absorbing structure 30 includes: an energy-absorbing structure body 31 defining an installation space 32; a second energy-absorbing structure 40 disposed within the installation space 32; a partition structure 33 within the installation space 32 to divide the installation space 32 into multiple sub-installation spaces 34; and at least one sub-installation space 34 containing the second energy-absorbing structure 40. The first energy-absorbing structure 30 may also include: an end cap 35; along the arrangement direction of the installation chamber 11 and the first energy-absorbing structure 30, the end of the installation space 32 is open; the end cap 35 is located on the side of the energy-absorbing structure body 31 facing away from the installation chamber 11; and the end cap 35 is fixed to the energy-absorbing structure body 31 and covers the open end of the installation space 32.

[0203] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0204] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0205] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, wherein, include: The housing has an installation compartment formed inside it, which accommodates multiple battery cells; A first energy-absorbing structure and a second energy-absorbing structure are provided. The first energy-absorbing structure is disposed in the housing. The first energy-absorbing structure is provided on at least one side of the installation compartment. The first energy-absorbing structure is located outside the installation compartment. At least a portion of the second energy-absorbing structure is disposed inside the first energy-absorbing structure.

2. The battery device according to claim 1, wherein, The first energy-absorbing structure includes: an energy-absorbing structure body, the energy-absorbing structure body defining an installation space, and the second energy-absorbing structure disposed within the installation space.

3. The battery device according to claim 2, wherein, The installation space is provided with a partition structure to divide the installation space into multiple sub-installation spaces, and at least one of the sub-installation spaces is provided with the second energy-absorbing structure.

4. The battery device according to claim 2 or 3, wherein, The first energy-absorbing structure further includes an end cap. Along the arrangement direction of the mounting chamber and the first energy-absorbing structure, the end of the mounting space is open. The end cap is located on the side of the energy-absorbing structure body away from the mounting chamber. The end cap is fixed to the energy-absorbing structure body and covers the open end of the mounting space.

5. The battery device according to any one of claims 1-4, wherein, The second energy-absorbing structure is fixed to the first energy-absorbing structure.

6. The battery device according to any one of claims 1-5, wherein, The second energy-absorbing structure has a cavity.

7. The battery device according to any one of claims 1-6, wherein, The second energy-absorbing structure is configured as multiple, and the multiple second energy-absorbing structures are arranged to form at least one second energy-absorbing structure layer.

8. The battery device according to claim 7, wherein, The second energy-absorbing structure layer is perpendicular to the arrangement direction of the mounting chamber and the first energy-absorbing structure.

9. The battery device according to claim 7 or 8, wherein, The second energy-absorbing structure layer is multi-layered, and the arrangement direction of the multi-layered second energy-absorbing structure layer is parallel to the arrangement direction of the installation chamber and the first energy-absorbing structure.

10. The battery device according to any one of claims 1-9, wherein, The second energy-absorbing structure includes an energy-absorbing tube and / or an energy-absorbing ball.

11. The battery device according to claim 10, wherein, The second energy-absorbing structure includes the energy-absorbing tube, which extends along the arrangement direction of the mounting chamber and the first energy-absorbing structure.

12. The battery device according to claim 3, wherein, The second energy-absorbing structure is configured as a plurality of structures, which are arranged to form at least one layer of the second energy-absorbing structure. The second energy-absorbing structure layer is perpendicular to the arrangement direction of the mounting chamber and the first energy-absorbing structure. At least one sub-mounting space is provided with the second energy-absorbing structure layer. Along the width direction of the second energy-absorbing structure layer, the ratio of the width dimension of the second energy-absorbing structure layer to the width dimension of the corresponding sub-mounting space is greater than or equal to 0.5 and less than or equal to 1; and / or Along the height direction of the second energy-absorbing structure layer, the ratio of the height dimension of the second energy-absorbing structure layer to the height dimension of the corresponding sub-installation space is greater than or equal to 0.5 and less than or equal to 1. The width direction of the second energy-absorbing structure layer, the height direction of the second energy-absorbing structure layer, and the arrangement direction of the installation chamber and the first energy-absorbing structure are all perpendicular to each other.

13. The battery device according to any one of claims 1-12, wherein, The first energy-absorbing structure is located outside the housing.

14. The battery device according to any one of claims 1-13, wherein, The box body includes multiple side beams, which are connected to form the installation chamber, and at least one of the side beams is provided with the first energy-absorbing structure.

15. The battery device according to claim 14, wherein, Along the length of the side beam on which the first energy-absorbing structure is provided, at least a portion of the first energy-absorbing structure is located in the middle region of the corresponding side beam.

16. The battery device according to claim 14 or 15, wherein, Along the arrangement direction of the first energy-absorbing structure and the installation chamber, the orthographic projection of the first energy-absorbing structure and the orthographic projection of the corresponding side beam have an overlapping area.

17. The battery device according to any one of claims 14-16, wherein, Along the arrangement direction of the first energy-absorbing structure and the installation chamber, the area of ​​the orthographic projection of the first energy-absorbing structure is S1, and the area of ​​the overlapping region between the orthographic projection of the first energy-absorbing structure and the orthographic projection of the corresponding side beam is S2, satisfying: 10% ≤ S2 / S1 ≤ 100%.

18. The battery device according to any one of claims 14-17, wherein, Along the arrangement direction of the first energy-absorbing structure and the installation chamber, the orthographic projection of the second energy-absorbing structure and the orthographic projection of the corresponding side beam have an overlapping area.

19. The battery device according to any one of claims 14-18, wherein, The plurality of side beams include: two first side beams and two second side beams, the two first side beams being arranged opposite to each other and spaced apart along the length direction of the battery device, the two second side beams being arranged opposite to each other and spaced apart along the width direction of the battery device, and at least one of the two first side beams being provided with the first energy-absorbing structure.

20. The battery device according to any one of claims 14-19, wherein, The installation chamber is provided with a partition beam to divide the installation chamber into an energy chamber and a buffer chamber. The energy chamber contains a plurality of the battery cells, and at least one of the first energy-absorbing structures and the energy chamber has the buffer chamber between them.

21. The battery device according to claim 20, wherein, The energy chamber and the buffer chamber are arranged along the length of the battery device.

22. The battery device according to claim 21, wherein, The plurality of side beams include: two first side beams and two second side beams, the two first side beams being arranged opposite to each other and spaced apart along the length direction of the battery device, the two second side beams being arranged opposite to each other and spaced apart along the width direction of the battery device, a partition beam extending along the width direction of the battery device and connecting between the two second side beams, the partition beam being spaced apart from both first side beams to form the energy chamber between the partition beam and one first side beam, and the buffer chamber being formed between the partition beam and the other first side beam.

23. The battery device according to any one of claims 20-22, wherein, Also includes: The third energy-absorbing structure is located inside the buffer chamber.

24. The battery device according to claim 23, wherein, The third energy-absorbing structure includes at least one of an energy-absorbing box, a buffer frame, a spring, and an airbag.

25. The battery device according to claim 23 or 24, wherein, The third energy-absorbing structure is fixedly connected to at least one of the partition beam and the side beam of the box body.

26. An electrical appliance, wherein, Includes the battery device according to any one of claims 1-25.

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