Battery device and electric device

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device.The battery device comprises a box body and a battery monomer assembly arranged in the box body, the box body comprises a plurality of side beams, the side beams provide protection for the battery monomer assembly, at least one of the side beams is provided with a groove, the groove is filled with a filling piece, and the filling piece is arranged in the groove. The grooves extend in the length direction of the side beams, so that the filling pieces correspondingly extend in the length direction of the side beams, the filling pieces can enhance the structural strength of the side beams, when the side beams are impacted by external force, the filling pieces can share part of impact force, and the possibility of deformation of the side beams is reduced; therefore, the stability and the integrity of the structure and the shape of the box body can be better maintained, the collision resistance and the extrusion resistance of the battery device are improved, a stable and reliable accommodating space is provided for the battery monomer assembly, the damage risk of the battery monomer assembly is reduced, and the use stability and the reliability of the battery device are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] With the development of science and technology, new energy electric vehicles have gradually become popular. As one of the core components of electric vehicles, batteries are the energy center of electric vehicles. For electric vehicles, battery technology is an important factor for the development of electric vehicles.

[0003] In the manufacturing process of batteries, the reliability of the battery is a problem that cannot be ignored. Therefore, how to improve the reliability of the battery is a technical problem that needs long-term attention in the battery technology.

[0004] The above statements are only used to provide background technical information related to the application, and do not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the embodiments of the application is to provide a battery device and a power utilization device to improve the problem of insufficient reliability of the battery device in the related art.

[0006] The technical scheme adopted by the embodiments of the application is:

[0007] In a first aspect, a battery device is provided, comprising:

[0008] The box body comprises a plurality of side beams, and the plurality of side beams are sequentially connected end to end to form an accommodating space.

[0009] The battery monomer assembly is arranged in the accommodating space; wherein

[0010] At least one side beam is provided with a groove extending along the length direction of the side beam, and the groove is filled with a filling piece.

[0011] The battery device provided by the embodiments of the present application has a box body including multiple side beams, a battery monomer assembly is arranged in an accommodating space formed by the side beams, and the side beams can provide protection for the battery monomer assembly from the side. At least one side beam is provided with a groove, and the groove is filled with a filling piece. In this way, when one or more side beams are located on a force receiving side of the box body that has a greater risk of impact, a groove can be arranged on the side beam at the position, and a filling piece that is adapted to the groove can be filled in the groove. The groove extends along the length direction of the side beam, so that the filling piece also extends along the length direction of the side beam. The filling piece can enhance the structural strength of the side beam. When the side beam is impacted by external force, the filling piece can share a part of the impact force, thereby reducing the possibility of deformation of the side beam, so that the stability and integrity of the structure and shape of the box body can be better maintained, the anti-collision and anti-extrusion capabilities of the battery device are improved, a stable and reliable accommodating space is provided for the battery monomer assembly, the risk of damage to the battery monomer assembly is reduced, and the use stability and reliability of the battery device are improved. In addition, the filling piece is filled in the groove of the side beam, and the material and performance parameters of the filling piece can be flexibly selected according to different application scenarios and requirements, so that the filling piece has different structural strengths, thereby improving the strength of the side beam to different degrees, so that the side beam can effectively resist the corresponding external impact force, and the structural design redundancy can be reduced while the impact resistance risk is met, the material is reduced, and the cost is reduced.

[0012] In some embodiments, the filling piece includes a structural glue piece, and the structural glue piece is bonded to the groove wall.

[0013] By adopting the technical scheme of the embodiments, the structural glue is poured into the groove of the side beam, and the structural glue fills the groove and forms the filling piece. Since the structural glue is a kind of adhesive with high strength, it can bear a certain load and can enhance the structural strength of the side beam. In addition, the structural glue is bonded to the groove wall, and the structure forming the groove is tightly connected into a whole through the structural glue, thereby also helping to enhance the overall structural strength of the side beam.

[0014] In some embodiments, the filling piece includes a foamed material piece, and the foamed material piece is embedded in the groove.

[0015] By adopting the technical scheme of the embodiments, the foamed material is embedded in the groove, and the foamed material is filled in the groove after foaming and tightly adheres to the groove wall, so that the foamed material can be stably and reliably fixed in the groove. In this way, the foamed material is embedded in the groove and fills the internal space of the groove, which can enhance the structural strength of the side beam to a certain extent. Some foamed materials also have good buffering effect and can absorb part of the vibration and impact, thereby reducing the transmission of the impact force to the inside. In addition, the foamed material itself has relatively light weight, and the anti-extrusion and anti-impact capabilities of the side beam can be improved without increasing the weight of the side beam too much, thereby meeting the lightweight development requirement of the battery device.

[0016] In some embodiments, the filling piece comprises a structural adhesive layer and a foamed material layer, and the foamed material layer is bonded to the groove wall of the groove through the structural adhesive layer.

[0017] By adopting the technical scheme of this embodiment, the structural adhesive layer is coated on the groove wall to form a structural adhesive layer, and the foamed material is bonded to the groove through the structural adhesive layer to form a foamed material layer, so that the foamed material can be stably and firmly fixed in the groove. In this way, the structural adhesive layer can improve the structural strength of the side beam, and the foamed material layer can absorb energy and buffer external force impact, thereby improving the extrusion resistance and impact resistance of the side beam from two dimensions of increasing structural strength and improving buffering capacity.

[0018] In some embodiments, the groove opening penetrates the side wall of the side beam away from the accommodation space.

[0019] By adopting the technical scheme of this embodiment, the groove opening is arranged away from the battery monomer assembly, the groove is located outside the accommodation space of the box body as a whole, and the filling piece covers the outer side surface of the side beam away from the battery monomer assembly. When extrusion or impact occurs, the external force first contacts the filling piece. In this way, the filling piece can also protect the side beam and reduce the risk of damage to the side beam.

[0020] In some embodiments, the side of the filling piece away from the accommodation space is flush with the groove opening, or the filling piece protrudes from the groove opening.

[0021] By adopting the technical scheme of this embodiment, the filling piece is flush with the groove opening, and the internal space of the groove is fully utilized to fill the filling material, thereby effectively improving the extrusion resistance and impact resistance of the side beam. Alternatively, the filling piece can also protrude from the groove opening and extend outward by a certain volume based on the internal space of the groove. On the premise that no interference occurs with other structures, the filling piece can further improve the effect of improving the extrusion resistance and impact resistance of the side beam.

[0022] In some embodiments, the groove opening penetrates the side wall of the side beam toward the accommodation space, and the side of the filling piece toward the accommodation space is located in the groove or flush with the groove opening.

[0023] By adopting the technical scheme of this embodiment, the groove opening is arranged toward the battery monomer assembly, the groove opening is arranged toward the accommodation space of the box body, the filling piece is arranged on the inner side surface of the side beam toward the battery monomer assembly, and when extrusion or impact occurs, the battery monomer assembly can reduce the probability of directly contacting the side beam by contacting the filling piece. The filling piece plays a certain isolation role between the side beam and the battery monomer assembly, and can reduce the risk of structural damage of the side beam and the battery monomer assembly caused by direct contact between the two.

[0024] In some embodiments, the side beam comprises two first beams, the two first beams are arranged in parallel and spaced apart along a first direction, at least one of the two first beams is provided with a groove, and the first direction is perpendicular to the length direction of the first beam.

[0025] By adopting the technical scheme of this embodiment, the first direction is perpendicular to the length direction of the first beam, the first direction can be the width direction of the battery device, thus the two first beams are arranged on the two sides of the width direction of the box body, the groove and the filler are arranged on the first beam, so as to correspondingly improve the structural strength of the side beams arranged on the two sides of the width direction of the box body, thereby improving the ability of the box body to resist lateral extrusion and lateral impact.

[0026] In some embodiments, the box body further comprises a top cover which is adapted to the side opening of the cover accommodating space, the first beam is provided with a first side wall which is connected with the top cover and faces the side of the top cover, the first beam has an outer side surface which is arranged away from the accommodating space, the first side wall protrudes from the outer side surface and is arranged along the length direction of the first beam, and the groove is located below the first side wall along the direction in which the top cover points to the first side wall.

[0027] By adopting the technical scheme of this embodiment, the first beam is provided with the first side wall which is used to be connected with the top cover of the box body, the groove is arranged in the lower space of the first side wall, the arrangement of the filler does not interfere with the installation of the top cover, and the installation of the top cover also does not affect the normal function of the filler.

[0028] In some embodiments, the protruding part of the first side wall from the outer side surface has a size in the range of 20mm to 30mm, and the size of the filler along the direction in which the first side wall protrudes from the outer side surface is greater than or equal to the size of the protruding part of the first side wall.

[0029] By adopting the technical scheme of this embodiment, the size of the protruding part of the first side wall from the side beam part is in the above-mentioned size range, which meets the assembly requirement of the top cover, and the size of the filler along the direction in which the first side wall protrudes from the outer side surface is greater than or equal to the size of the protruding part of the first side wall, so that the filler has a certain thickness size and can effectively improve the impact resistance and extrusion resistance of the side beam.

[0030] In some embodiments, the first beam is further provided with a second side wall which extends along the length direction of the first beam, the second side wall protrudes from the outer side surface, the second side wall is arranged below the first side wall along the direction in which the top cover points to the first side wall, and the first side wall facing the wall surface of the second side wall, the wall surface of the second side wall facing the first side wall, and part of the outer side surface form the groove.

[0031] By adopting the technical scheme of this embodiment, the second side wall which is spaced apart from the first side wall is arranged on the outer side wall of the side beam, so as to form the groove, and the filler is clamped between the first side wall and the second side wall, so that the groove is formed in a simple way, the structure of the side beam is simple, and the side beam is easy to be formed and manufactured.

[0032] In some embodiments, the first side wall and the second side wall respectively extend from one end of the first beam to the opposite end, and the groove is open at both ends along the length direction thereof.

[0033] By adopting the technical scheme of the embodiment, the groove is open at both ends along the length direction of the side beam, and the size of the groove can be substantially equal to the length of the side beam, so that the structure of the side beam can be fully utilized to fill the filler. Meanwhile, for some fillers which are installed after being formed, the groove structure with both ends open is also more convenient for installing the filler.

[0034] In some embodiments, the size of the second side wall from the protruding part of the outer side is greater than the size of the first side wall from the protruding part of the outer side, and the second side wall is provided with a plurality of connecting structures for adaptive connection with an external structure.

[0035] By adopting the technical scheme of the embodiment, the second side wall is used as a mounting structure for adaptive connection with an external structure, so as to connect the battery device with the external structure. Thus, the first side wall for connecting with the top cover and the second side wall for connecting with the external structure are both general structures which need to be provided in the box structure, so that the original structure of the side beam can be fully utilized to form the groove and the filler is provided, and the side beam structure does not need to be adaptively changed, which has good practicability.

[0036] In some embodiments, the first side wall and the second side wall are integrally formed with the first beam.

[0037] By adopting the technical scheme of the embodiment, the first side wall, the second side wall and the first beam are integrally formed by using the same manufacturing process, and do not need to be assembled and connected, so that the structure has higher integrity and continuity, thereby helping to improve the extrusion resistance and impact resistance of the whole component.

[0038] In a second aspect, the embodiments of the present application also provide a power utilization device, which comprises the battery device as described in the above embodiments, and the battery device is used for storing or providing electric energy.

[0039] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0042] Figure 2 This is an exploded view of a battery device according to some embodiments of this application;

[0043] Figure 3 Exploded schematic diagrams of battery devices provided for other embodiments of this application;

[0044] Figure 4 for Figure 3 A partial structural diagram of the battery pack housing is shown.

[0045] Figure 5 for Figure 4 An exploded view of a portion of the box structure shown;

[0046] Figure 6 for Figure 4 Enlarged view of point A in the middle;

[0047] Figure 7 for Figure 5 Enlarged view at point B;

[0048] Figure 8 for Figure 4 Another perspective view of a partial structure of the box shown;

[0049] Figure 9 For along Figure 8 A partial view of the sectional view along line AA in the middle;

[0050] Figure 10 A cross-sectional view of a partial structure of the housing of a battery device provided in another embodiment.

[0051] The following are the labeling elements in the figure:

[0052] 100. Vehicle; 101. Controller; 102. Motor;

[0053] 200. Battery device;

[0054] 10, box; 1001, containing space; 11, top cover; 12, bottom plate; 13, frame; 14, expansion beam; 15, side beam; 151, first beam; 1511, outer side; 152, second beam; 153, groove; 154, filler; 1541, structural adhesive layer; 1542, foaming material layer; 155, first side wall; 156, second side wall; 157, connecting structure;

[0055] 20, battery cell assembly. DETAILED DESCRIPTION

[0056] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application more clearly understood, the following will combine with the accompanying drawings to further describe the present application. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not intended to limit the present application. Figures 1 to 10 and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not intended to limit the present application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and claims of this application and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0058] In the description of the embodiments of the present application, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0059] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0060] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0061] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise explicitly specified and limited.

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0065] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "adjacent" means close in position. For example, A1, A2 and B three components, the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, and B is also adjacent to A2. For example, when there are a plurality of C components, the plurality of C components are C1, C2……CN, and one of the C components, such as C2, is closer to the B component than the other C components, then B is adjacent to C2, and C2 is also adjacent to B.

[0066] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor affecting its development. During the manufacturing process of the battery, the reliability of the battery is a problem that cannot be ignored. Therefore, how to improve the reliability of the battery is a technical problem that needs to be solved in battery technology.

[0067] The battery generally includes a box body and a battery cell assembly arranged in the box body. An accommodating space is arranged in the box body to accommodate the battery cell assembly. The box body is used to provide protection for the battery cell assembly outside the battery cell assembly and provide a stable mounting space for the battery cell assembly. The box body generally includes a top cover, a frame and a bottom plate. The frame is mounted around the periphery of the bottom plate. The frame and the bottom plate surround to form a cavity with an upper opening. The top cover is connected with the frame and covers the opening of the cavity, so as to form a closed accommodating space in the box body. Generally, the frame includes a plurality of side beams sequentially connected end to end. The plurality of side beams are arranged around the accommodating space. The structural strength of the side beam, its ability to resist external impact force and the stability of the internal battery cell assembly are closely related. Effective use of the side beam to resist external force or to buffer and absorb the force can improve the overall structural strength of the box body, thereby improving the anti-collision and anti-extrusion capability of the battery device and improving the use stability and reliability of the battery device.

[0068] Therefore, the embodiments of the present application provide a battery device. The box body of the battery device includes a plurality of side beams. The battery cell assembly is arranged in an accommodating space surrounded by the side beams. The side beams can provide protection for the battery cell assembly from the side. At least one side beam is provided with a groove. The groove is filled with a filling piece. In this way, when one or more side beams are located on the force side of the box body with a greater impact risk, a groove can be arranged on the side beam at this position, and a filling piece adapted thereto can be filled in the groove. The groove extends along the length direction of the side beam, so that the filling piece extends along the length direction of the side beam. The filling piece can enhance the structural strength of the side beam. When the side beam is subjected to external impact force, the filling piece can share part of the impact force, reducing the possibility of deformation of the side beam, thereby better maintaining the stability and integrity of the box body structure and shape, improving the anti-collision and anti-extrusion capability of the battery device, providing a stable and reliable accommodating space for the battery cell assembly, reducing the risk of damage to the battery cell assembly, and improving the use stability and reliability of the battery device. Moreover, the filling piece filled in the groove of the side beam can also be flexibly selected in terms of material and performance parameters according to different application scenarios and requirements, so as to have different structural strengths and thus improve the strength of the side beam to different degrees, so that the side beam can effectively resist the corresponding external impact force, meet the impact resistance risk, and reduce the structural design redundancy, reduce the material and cost.

[0069] In the embodiments of the present application, the battery cell assembly can be a secondary battery, which refers to a battery cell assembly that can be activated by charging after discharging.

[0070] The battery cell assembly can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0071] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cell assemblies, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0072] For convenience of description, an electric device is provided in an embodiment of the present application, which is taken as an example of a vehicle for description.

[0073] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a vehicle 100 is provided for some embodiments of the present application. The vehicle 100 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended range car, etc. The vehicle 100 is internally provided with a battery device 200, which can be arranged at the bottom, head or tail of the vehicle 100. The battery device 200 can be used for power supply of the vehicle 100, for example, the battery device 200 can be used as an operating power source of the vehicle 100. The vehicle 100 can further include a controller 101 and a motor 102, and the controller 101 is used to control the battery device 200 to supply power to the motor 102, for example, to meet the power demand of the vehicle 100 during starting, navigation and driving.

[0074] In some embodiments, the battery device 200 can not only be used as an operating power source of the vehicle 100, but also be used as a driving power source of the vehicle 100, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 100.

[0075] Please refer to Figure 2 The embodiments of the present application provide a battery device 200 (Battery Apparatus). The battery device 200 can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 (Battery Cell Assembly) can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0076] In some embodiments, the battery cell assembly 20 is typically formed by arranging a plurality of battery cells.

[0077] As an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing a plurality of battery cells into a single module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0078] In some embodiments, the battery device 200 can be a battery pack, which includes the case 10 and one or more battery cell assemblies 20, which are accommodated in the case 10.

[0079] As an example, the battery cell assembly 20 can be a battery module, which can be accommodated in the case 10 by fixing the battery module in the case 10.

[0080] As an example, the battery cell assembly 20 can also be accommodated in the case 10 by directly fixing a plurality of battery cells in the case 10.

[0081] Please refer to Figure 2 In some embodiments, the case 10 has an accommodation space 1001 inside to accommodate the battery cell assembly 20. The case 10 can be made of a material having certain hardness and strength, so that the case 10 is not easily deformed when subjected to extrusion and impact, so that the battery device 200 can have higher structural strength and reliability can also be improved. The material of the case 10 can be various, including but not limited to aluminum, stainless steel, aluminum alloy, iron or plastic, etc.

[0082] In some embodiments, the case 10 can be part of the chassis structure of the vehicle 100. For example, part of the case 10 can be at least part of the floor of the vehicle 100, or part of the case 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 100.

[0083] As an example, the case 10 can include a first part and a second part, which are combined to form a closed accommodation space 1001 inside the case 10 to accommodate the battery cell assembly 20. Here, closed means covered or closed, which can be sealed or unsealed. One of the first part and the second part can be a hollow structure with one side open, and the other of the first part and the second part can be a top cover 11 adapted to cover the hollow structure. The first part and the second part can also be both hollow structures with one side open, and the open side of the first part is combined with the open side of the second part.

[0084] As an example, the housing 10 may include a top cover 11, a frame 13, and a bottom plate 12. The top cover 11 and the bottom plate 12 are respectively connected to the frame 13, so that the interior of the housing 10 forms a closed receiving space 1001 to accommodate the battery cell assembly 20.

[0085] In some embodiments, the housing 10 further includes an expansion beam 14, which is installed in the accommodating space 1001 inside the housing 10. The expansion beam 14 is used to support the battery cell assembly 20 to limit the expansion deformation of the battery cell assembly 20. At the same time, the expansion beam 14 can also increase the structural strength of the housing 10 by connecting with the frame 13.

[0086] In some embodiments, the expansion beam 14 can also be connected to the bottom plate 12 of the box 10 to better fix the expansion beam 14 in the box 10.

[0087] In some embodiments, the housing 10 further includes a mounting structure, such as a mounting beam, which is fixedly connected to the frame 13. The mounting structure is provided with a connecting structure 157 for connecting external devices using the battery device 200. Exemplarily, the mounting structure is provided with mounting holes for connecting external devices using the battery device 200 via bolts or other connecting components.

[0088] The following, in conjunction with the appendix Figures 3 to 10 The battery device of this application will be described in detail with specific embodiments. In the embodiments of this application, the length direction of the side beam is the direction shown by arrow F1 in the figure, the length direction of the battery device is in the same direction as the length direction of the side beam, the width direction of the battery device is the direction shown by arrow F2 in the figure, the height direction of the battery device is the direction shown by arrow F3 in the figure, and the first direction is in the same direction as the width direction of the battery device.

[0089] Please see Figures 3 to 9 This application provides a battery device 200, which includes a housing 10 and a battery cell assembly 20. The housing 10 includes a plurality of side beams 15, which are arranged end to end to form a receiving space 1001. The battery cell assembly 20 is disposed in the receiving space 1001. At least one side beam 15 is provided with a groove 153 extending along its length direction, and the groove 153 is filled with a filler 154.

[0090] Understandably, in this embodiment, as Figure 3As shown, the battery cell assembly 20 can include one or more battery cells, wherein when the battery cell assembly 20 includes a plurality of battery cells, the plurality of battery cells can be electrically connected in series, in parallel, or in a mixed connection. The battery cell can be a secondary battery or a primary battery; the battery cell can be a lithium battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell can be a prismatic battery cell or a cylindrical battery cell, such as a square battery cell, or a hexagonal battery cell, etc.

[0091] In the present embodiment, as shown, Figure 3 The box body 10 can adopt various structures. Exemplarily, the box body 10 can include a first part and a second part, the first part and the second part are mutually coverable, and the first part and the second part jointly define an internal space for accommodating the battery cell assembly 20. The second part can be a hollow structure with one end open, and the first part can be a plate-shaped structure, which is coverable on the open side of the second part. The first part can be the top cover 11 of the box body 10. The box body 10 further includes a plurality of side beams 15, which are sequentially connected end to end to form a ring-shaped frame 13. The bottom plate 12 can be connected with the ring-shaped frame 13 to form the second part. Here, the connection of the ring-shaped frame 13 with the bottom plate 12 means that the ring-shaped frame 13 is mounted on one side surface of the bottom plate 12 and wraps around the middle part of the bottom plate 12. The inner ring surface of the ring-shaped frame 13 defines an accommodation space 1001, and the bottom plate 12 is connected to one side of the ring-shaped frame 13 and covers one side opening of the accommodation space 1001.

[0092] It can be understood that the box body 10 includes a plurality of side beams 15, which form the ring-shaped frame 13. In some examples, the box body 10 can include a plurality of side beams 15 that are independent of each other, and the plurality of side beams 15 are sequentially arranged and connected end to end to form the ring-shaped frame 13. For example, the box body 10 can include two first beams 151 and two second beams 152, and the four side beams 15 are arranged in a ring shape in the order of the first beam 151, the second beam 152, the first beam 151, and the second beam 152, and are connected end to end to form the frame 13. In other examples, the box body 10 includes a plurality of side beams 15, which can be an integral piece. For example, the frame 13 includes a roll-formed beam having four corner portions, and the portion between adjacent two corner portions can be divided into a side beam 15. Here, the roll-formed beam refers to a beam-shaped structure manufactured by a roll forming process, which is a metal forming process that gradually deforms a metal plate by applying pressure to the metal plate by a series of rollers to form a desired shape. For example, a metal plate such as a sheet metal plate or a steel plate can be used to form a hollow roll-formed member by a roll forming process, and then a ring-shaped member having four corner portions can be obtained by a roll bending process. Then, the two end portions of the ring-shaped roll-formed beam are sealed and welded to form a closed frame 13.

[0093] In the embodiment, as shown in Figures 4 to 7 The box 10 comprises a plurality of side beams 15, one side beam 15 is provided with the groove 153, or two side beams 15 are respectively provided with the groove 153, or more than two side beams 15 are respectively provided with the groove 153, and the groove 153 is arranged along the length direction of the side beam 15 where the groove 153 is located. For example, when one side beam 15 of the box 10 is located on the main force side with a greater impact risk, the groove 153 can be arranged on the side beam 15 in correspondence, and the filler 154 is arranged to fill the groove 153, or when two or more side beams 15 of the box 10 are located on the force side with a greater impact risk, the grooves 153 can be arranged on the side beams 15 in correspondence and filled with the filler 154. Wherein, the groove 153 refers to a kind of recess structure formed by the surface of the side beam 15 being recessed inward, that is, the groove 153 is not a cavity structure arranged in the beam body of the side beam 15, and it has an opening on the surface of the side beam 15. For example, the groove 153 can be formed on the surface of the side beam 15 by removing part of the material or using a specific process forming mode.

[0094] In the embodiment, as shown in Figures 4 to 7 The groove 153 is filled with the filler 154, the shape and size of the filler 154 are matched with the groove 153, so that the filler 154 can be accurately installed in the groove 153 and cannot be moved at will. The groove 153 extends along the length direction of the side beam 15, so that the filler 154 corresponds to extend along the length direction of the side beam 15. The filler 154 can enhance the structural strength of the side beam 15. When the side beam 15 is impacted by external force, the filler 154 can share a part of the impact force, reduce the possibility of deformation of the side beam 15, and thus protect the internal battery monomer assembly 20. For example, the filler 154 can be a metal piece, an elastic piece, a plastic piece or a material piece with elasticity and plasticity, etc.

[0095] The battery device 200 of the embodiment of the present application, the box body 10 comprises a plurality of side beams 15, the battery monomer assembly 20 is arranged in the accommodating space 1001 formed by the side beams 15, the side beams 15 can provide protection for the battery monomer assembly 20 from the side, wherein at least one side beam 15 is provided with a groove 153, the groove 153 is filled with a filling piece 154, so that when one or more side beams 15 are located on the stress side of the box body 10 with greater impact risk, the groove 153 can be arranged on the side beam 15 located at the position, and the filling piece 154 matched with the groove 153 is filled in the groove 153, the groove 153 extends along the length direction of the side beam 15, so that the filling piece 154 extends along the length direction of the side beam 15, the filling piece 154 can enhance the structural strength of the side beam 15, when the side beam 15 is impacted by external force, the filling piece 154 can share a part of the impact force, reduce the possibility of deformation of the side beam 15, so as to better maintain the stability and integrity of the structure and shape of the box body 10, improve the anti-collision and anti-extrusion ability of the battery device 200, provide a stable and reliable accommodating space 1001 for the battery monomer assembly 20, reduce the risk of damage of the battery monomer assembly 20, and improve the use stability and reliability of the battery device 200. Moreover, the filling piece 154 filled in the groove 153 of the side beam 15 can also flexibly select the material and performance parameters of the filling piece 154 according to different application scenarios and requirements, so that the filling piece 154 has different structural strengths, thereby improving the strength of the side beam 15 to different degrees, so that the side beam 15 can effectively resist the corresponding external impact force, meet the impact resistance risk, and reduce the structural design redundancy, reduce the material and reduce the cost.

[0096] In some embodiments, the filling piece 154 comprises a structural adhesive piece, and the structural adhesive piece is bonded to the groove wall of the groove 153.

[0097] In the embodiment, the structural adhesive is poured in the groove 153 of the side beam 15, and the structural adhesive fills the groove 153 and forms the filling piece 154. Since the structural adhesive is a kind of adhesive with high strength, it can bear a certain load, and can enhance the structural strength of the side beam 15. In addition, the structural adhesive is bonded to the groove wall of the groove 153, and the structure forming the groove 153 is tightly connected into a whole through the structural adhesive, thereby also helping to enhance the overall structural strength of the side beam 15.

[0098] In other embodiments, the filling piece 154 comprises a foamed material piece, and the foamed material piece is embedded in the groove 153.

[0099] ​In this way, the foamed material is embedded in the groove 153, and after foaming, the foamed material fills the groove 153 and closely adheres to the groove wall of the groove 153, so that the foamed material can be stably and reliably fixed in the groove 153. In this way, the foamed material is embedded in the groove 153 to fill the internal space of the groove 153, which can enhance the structural strength of the side beam 15 to some extent. Some foamed materials also have good cushioning effect and can absorb part of the vibration and impact, thereby reducing the transmission of impact force inward. In addition, the foamed material itself has relatively light weight, which can improve the extrusion resistance and impact resistance of the side beam 15 while not increasing the weight of the side beam 15 too much, thereby meeting the lightweight development needs of the battery device 200.

[0100] In some embodiments, as shown in FIG. 1, the filling piece 154 includes a structural adhesive layer 1541 and a foamed material layer 1542. The foamed material layer 1542 is bonded to the groove wall of the groove 153 through the structural adhesive layer 1541. Figure 9

[0101] In the embodiment, the structural adhesive layer 1541 is formed by coating the structural adhesive on the groove wall of the groove 153, and then the foamed material layer 1542 is formed by bonding the foamed material to the groove 153 through the structural adhesive layer 1541. In this way, the foamed material can be stably and firmly fixed in the groove 153. In this way, the structural adhesive layer 1541 can improve the structural strength of the side beam 15, and the foamed material layer 1542 can absorb energy and buffer external force impact, thereby improving the extrusion resistance and impact resistance of the side beam 15 from two dimensions of increasing structural strength and improving cushioning capacity.

[0102] In the above embodiments, the structural adhesive can be an epoxy structural adhesive, an acrylic structural adhesive, a silicone structural adhesive, a urethane structural adhesive, or a polyimide structural adhesive, etc.

[0103] In the above embodiments, the foamed material can be a soft polyurethane material, a polystyrene foamed material, a polyethylene foamed material, or a polypropylene foamed material, etc.

[0104] ​It can be understood that, in the above embodiments, in order to enable the foamed material piece or layer 1542 to be firmly embedded in the groove 153 after forming, the foamed material piece can be used in combination with the performance of the foamed material (such as the foaming ratio, etc.), and by controlling the amount of foamed material, the foaming temperature and time, etc., a foamed material piece or layer 1542 with a size matching the groove 153 can be formed. For example, in the embodiment in which the groove 153 is filled with foamed material alone, a certain amount of foamed material is placed in the groove 153 to allow it to expand sufficiently to fill the groove 153; in the embodiment in which the foamed material is adhered by the structural adhesive, a certain thickness of the structural adhesive layer 1541 can be applied to the groove wall of the groove 153, and then a certain amount of foamed material can be uniformly covered on the surface of the structural adhesive layer 1541, and the foamed material can be expanded sufficiently to fill the groove 153. The specific amount of foamed material can be calculated according to the requirements, which is not limited here.

[0105] In some embodiments, as shown in Figure 3 、 Figure 4 、 Figure 7 and Figure 9 , the opening of the groove 153 penetrates the side beam 15 away from the side wall of the accommodation space 1001.

[0106] In the present embodiment, the opening of the groove 153 is arranged away from the battery monomer assembly 20, and the groove 153 is located outside the accommodation space 1001 of the box body 10 as a whole. The filling piece 154 covers the outer side surface of the side beam 15 away from the battery monomer assembly. When being pressed or impacted, the external force first contacts the filling piece 154. Therefore, the filling piece 154 can also play a role in protecting the side beam 15 and reducing the risk of damage to the side beam 15.

[0107] In some embodiments, as shown in Figure 2 、 Figure 5 、 Figure 7 and Figure 8 , the side of the filling piece 154 away from the accommodation space 1001 is flush with the opening. The filling piece 154 is flush with the opening of the groove 153, which makes full use of the internal space of the groove 153 to fill the filling material, and effectively improves the extrusion and impact resistance of the side beam 15.

[0108] In other embodiments, the filling piece 154 protrudes from the opening, that is, the filling piece 154 extends outward by a certain volume based on the internal space of the groove 153. In this way, without interfering with other structures, the filling piece 154 can further improve the extrusion and impact resistance of the side beam 15.

[0109] In the above embodiments, when the filler 154 is a foamed material piece or the filler 154 includes a foamed material layer 1542, when the filler 154 is formed, for the scheme that the filler 154 is flush with the slot of the groove 153, a sealing plate structure with a flat surface can be first arranged at the slot position of the groove 153 to cover the slot, and the foamed material is expanded and foamed between the sealing plate and the slot wall of the groove 153, so as to form the filler 154 with a flat surface in the groove 153; for the scheme that the filler 154 partially exceeds the slot of the groove 153, a box-shaped structure with an open side can be first arranged at the slot position of the groove 153, the box-shaped structure is connected with the side beam 15 and the opening of the box-shaped structure is opposite to the slot of the groove 153, and the foamed material is expanded and foamed between the box-shaped structure and the slot wall of the groove 153, so that the filler 154 has a part of the volume protruding from the slot of the groove 153 on the basis of filling the groove 153.

[0110] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 8 , the side beam 15 includes two first beams 151, the two first beams 151 are arranged in parallel and spaced apart along a first direction, and at least one of the two first beams 151 is provided with a groove 153, the first direction is perpendicular to the length direction of the first beam 151.

[0111] The length direction of the first beam 151 can be parallel to the length direction of the battery device 200, that is, the first beam 151 is arranged along the length direction of the battery device 200, the first direction is perpendicular to the length direction of the first beam 151, and the first direction can be the width direction of the battery device 200, and the two first beams 151 are arranged in parallel and spaced apart along the first direction, that is, the two first beams 151 are located on the two sides along the width direction of the battery device 200.

[0112] In this way, the two first beams 151 are arranged on the two sides of the width direction of the box body 10, and the groove 153 and the filler 154 are arranged on the first beam 151 to correspondingly improve the structural strength of the side beam 15 arranged on the two sides of the width direction of the box body 10, thereby improving the ability of the box body 10 to resist lateral extrusion and lateral impact. For example, when the battery device 200 is installed on a vehicle, the width direction of the battery device 200 is the same as the width direction of the vehicle, and the two sides of the battery device 200 along the width direction are at a higher risk of being impacted laterally. Therefore, the groove 153 is arranged on the side beam 15, that is, the first beam 151, located on the two sides, and the filler 154 is filled in, so as to improve the ability of the side beam 15 to resist lateral impact.

[0113] In specific embodiments, the two first beams 151 can be side beams arranged on both sides of the width direction of the battery device 200, and the side beams 15 can further include two second beams 152 arranged in parallel and spaced apart along the length direction thereof as end beams of the box 10. A first beam 151 (side beam), a second beam 152 (end beam), a first beam 151 (side beam), and a second beam 152 (end beam) are sequentially connected end to end to form the frame 13, and the internal space of the frame 13 forms the accommodation space 1001 for mounting the battery cell group.

[0114] In some embodiments, as shown in Figure 4 、 Figure 6 and Figure 9 , the box 10 further includes a top cover 11 adapted to cover an opening of the accommodation space 1001. The first beam 151 has a first side wall 155 connected to the top cover 11 at a side edge thereof facing the top cover 11. The first beam 151 has an outer side surface 1511 arranged away from the accommodation space 1001. The first side wall 155 protrudes from the outer side surface 1511 and extends along the length direction of the first beam 151. The recess 153 is located below the first side wall 155 in a direction of the top cover 11 pointing to the first side wall 155.

[0115] In the present embodiment, the first beam 151 is provided with the first side wall 155 for connection with the top cover 11 of the box 10. The recess 153 is arranged in a lower space of the first side wall 155. The arrangement of the filler 154 does not interfere with the installation of the top cover 11, and the normal function of the filler 154 is not affected after the installation of the top cover 11.

[0116] In specific embodiments, the first side wall 155 can be a flange structure formed by bending and extending a side wall of the side beam 15 facing the top cover 11 in a direction away from the accommodation space 1001. The flange can be provided with a plurality of connecting structures such as screw holes, buckles, or clamping grooves. The top cover 11 is connected and locked with the flange through the connecting structures, and covers an opening of the accommodation space 1001.

[0117] In some embodiments, as shown in Figure 4 、 Figure 6 and Figure 9 , the size L of the protruding part of the first side wall 155 from the outer side surface 1511 is in the range of 20 mm to 30 mm. In a direction in which the first side wall 155 protrudes from the outer side surface 1511, the size of the filler 154 is greater than or equal to the size of the protruding part of the first side wall 155.

[0118] Therefore, the protruding part of the first side wall 155 has a size within the above-mentioned size range, which meets the assembly requirement of the top cover 11, and the size of the filler 154 in the direction of protruding from the outer side surface 1511 of the first side wall 155 is greater than or equal to the size of the protruding part of the first side wall 155, and the filler 154 has a certain thickness, which can effectively improve the impact resistance and extrusion resistance of the side beam 15. The direction of protruding of the first side wall 155 from the outer side surface 1511 is the same as the width direction of the battery device 200.

[0119] In specific embodiments, the protruding part of the first side wall 155 from the outer side surface 1511 of the side beam 15 can have a size of 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm, etc. The specific value is not limited herein, and can be selected according to actual conditions during design.

[0120] In some embodiments, as shown in Figure 4 、 Figure 6 and Figure 9 , the first beam 151 further comprises a second side wall 156 extending along the length direction thereof, the second side wall 156 protrudes from the outer side surface 1511 and is arranged below the first side wall 155 in the direction of the top cover 11 pointing to the first side wall 155, and the wall surface of the first side wall 155 facing the second side wall 156, the wall surface of the second side wall 156 facing the first side wall 155 and part of the outer side surface 1511 form a groove 153.

[0121] In the direction of the top cover 11 pointing to the first side wall 155, i.e. in the height direction of the battery monomer, the second side wall 156 is arranged at the outer side surface 1511 of the side beam 15 and spaced from the first side wall 155, so as to form the groove 153, and the filler 154 is clamped between the first side wall 155 and the second side wall 156. The groove 153 is simple in forming mode, and the side beam 15 is simple in structure and easy to form and manufacture.

[0122] In some embodiments, as shown in Figure 4 、 Figure 5 、 Figure 7 and Figure 9 , the first side wall 155 and the second side wall 156 respectively extend from one end of the first beam 151 to the opposite end, and the groove 153 is open at both ends in the length direction thereof.

[0123] The groove 153 is open at both ends along the length direction of the side beam 15, and the size of the groove 153 can be substantially equal to the length of the side beam 15. In this way, the filler 154 can be arranged in the structure of the side beam 15. Meanwhile, for some pre-formed fillers 154, the open groove 153 structure is more convenient for installing the filler 154.

[0124] In some embodiments, as shown in Figure 4 、 Figure 8 and Figure 9 The size of the second side wall 156 from the protruding part of the outer side 1511 is greater than the size of the first side wall 155 from the protruding part of the outer side 1511. The second side wall 156 is provided with a plurality of connecting structures 157 for adaptive connection with external structures.

[0125] The second side wall 156 can be used as a mounting structure for adaptive connection with external structures, thereby connecting the battery device 200 with external structures. The protruding size of the second side wall 156 from the outer side wall of the side beam 15 is greater than the protruding size of the first side wall 155, so that the second side wall 156 does not interfere with the top cover 11 when connected with external structures, thereby ensuring the normal installation of the battery device 200. The connecting structure 157 can be a structure such as a threaded hole, a buckle, a clamping groove, etc.

[0126] In the present embodiment, the first side wall 155 for connecting with the top cover 11 and the second side wall 156 for connecting with external structures are both general structures that need to be arranged in the box 10 structure. In this way, the original structure of the side beam 15 can be fully utilized to form the groove 153 and the filler 154 can be arranged. The structure of the side beam 15 does not need to be changed adaptively, and has good universality and practicability.

[0127] In some embodiments, the first side wall 155 and the second side wall 156 are integrally formed with the first beam 151.

[0128] The first side wall 155, the second side wall 156, and the first beam 151 are integrally formed by using the same manufacturing process, and do not need to be assembled and connected. The structure has higher integrity and continuity, thereby helping to improve the extrusion resistance and impact resistance of the entire component.

[0129] In specific embodiments, the side beam 15 with the first side wall 155 and the second side wall 156 described above can be integrally manufactured by casting process, and then the filler 154 is filled between the first side wall 155 and the second side wall 156; or, the side beam 15 with the first side wall 155 and the second side wall 156 can be formed by injection molding process by using a mold to inject material melt; or, the side beam 15 with the first side wall 155 and the second side wall 156 can be formed by forging process by using a forging press to apply pressure to a metal blank; or, the side beam 15 with the first side wall 155 and the second side wall 156 can be formed by stamping process by placing a metal sheet between stamping dies and applying pressure by a press to forge the side beam 15 with the first side wall 155 and the second side wall 156 at one time.

[0130] In other embodiments, unlike the above embodiments, as shown in FIG. 1B, the notch of the groove 153 can also extend through the side wall of the side beam 15 toward the accommodation space 1001, and the side surface of the filler 154 facing the accommodation space 1001 is located in the groove 153 or flush with the notch of the groove 153. Figure 10

[0131] In this way, the notch of the groove 153 faces the accommodation space 1001 of the box 10, the notch of the groove 153 faces the battery monomer assembly 20, the filler 154 is arranged on the inner side surface of the side beam 15 facing the battery monomer assembly, and when the battery monomer assembly 20 is squeezed or impacted, the battery monomer assembly 20 can reduce the probability of directly contacting the side beam 15 by contacting the filler 154. The filler 154 plays a certain isolation role between the side beam 15 and the battery monomer assembly 20, and can reduce the risk of structural damage of the battery monomer assembly 20 and the side beam 15 caused by direct contact between the two to a certain extent.

[0132] Please refer to Figures 3 to 9 An embodiment of the present application provides a battery device 200, which comprises a box 10 and a battery monomer assembly 20 arranged in the box 10. The box 10 comprises four side beams 15, two of which are first beams 151 and the other two are second beams 152. The four side beams 15 are arranged in the form of one first beam 151, one second beam 152, one first beam 151 and one second beam 152 in sequence and connected end to end to form a frame 13 in the shape of a ring. An internal space surrounded by the frame 13 forms an accommodation space 1001 for installing the battery monomer assembly 20.

[0133] ​The two first beams 151 are arranged on opposite sides of the box body 10 along the width direction of the battery device 200 (the direction indicated by the arrow F2 in the figure), and the side of the first beam 151 close to the top cover 11 is folded and extended in a direction away from the accommodating space 1001 to form a first side wall 155, and a plurality of connecting holes are arranged on the first side wall 155 at intervals. The box body 10 further comprises the top cover 11, which is locked on the first beam 151 by cooperating with the connecting holes through fasteners such as screws or bolts. Along the width direction of the battery device 200, the size of the first side wall 155 from the protruding part of the outer side surface 1511 of the first beam 151 is 25 mm, and the outer side surface 1511 of the first beam 151 further protrudes to form a second side wall 156. Along the height direction of the battery device 200 (the direction indicated by the arrow F3 in the figure), the second side wall 156 is arranged at the lower part of the first side wall 155 at intervals, and the first side wall 155 and the second side wall 156 both extend from one end of the first beam 151 to the opposite end along the length direction of the first beam 151 (the direction indicated by the arrow F1 in the figure). A plurality of connecting holes are also arranged on the second side wall 156, which are used to connect the battery device 200 and an external structure such as the floor of a vehicle by cooperating with the fasteners as a connecting structure 157. The wall surface of the first side wall 155 facing the second side wall 156, the wall surface of the second side wall 156 facing the first side wall 155, and part of the outer side wall of the first beam 151 jointly form a groove 153, and a foamed material layer 1542 is arranged in the groove 153. The foamed material layer 1542 is adhered to the groove wall of the groove 153 through a structural adhesive layer 1541, the structural adhesive layer 1541 and the foamed material layer 1542 form a filling piece 154 filled in the groove 153, and the side wall of the filling piece 154 away from the accommodating space 1001 is flush with the groove opening of the groove 153.

[0134] Another embodiment of the present application also provides a power utilization device comprising the battery device provided by any of the above embodiments.

[0135] The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be referred to each other, which will not be described herein for the sake of brevity.

[0136] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a plurality of side beams, the plurality of side beams being sequentially connected end to end to form a containing space; a battery cell assembly arranged in the containing space; wherein at least one of the side beams is provided with a groove extending along the length direction of the side beam, and the groove is filled with a filling member.

2. The battery device of claim 1, wherein: The filling member comprises a structural adhesive member, and the structural adhesive member is bonded to the groove wall.

3. The battery device of claim 1, wherein: The filling member comprises a foamed material member, and the foamed material member is embedded in the groove.

4. The battery device of claim 1, wherein: The filling member comprises a structural adhesive layer and a foamed material layer, and the foamed material layer is bonded to the groove wall through the structural adhesive layer.

5. The battery device according to any one of claims 1 to 4, characterized by: The groove opening penetrates the side wall of the side beam away from the containing space.

6. The battery device of claim 5, wherein: The side of the filling member away from the containing space is flush with the groove opening, or the filling member protrudes from the groove opening.

7. The battery device according to any one of claims 1 to 4, characterized by: The groove opening penetrates the side wall of the side beam towards the containing space, and the side of the filling member towards the containing space is located in the groove or flush with the groove opening.

8. The battery device of claim 5, wherein: The side beam comprises two first beams, and the two first beams are arranged in parallel and spaced apart along a first direction, and at least one of the two first beams is provided with the groove, and the first direction is perpendicular to the length direction of the first beam.

9. The battery device of claim 8, wherein: The box body further comprises a top cover adapted to cover one side opening of the containing space, and the side edge of the first beam towards the top cover is provided with a first side wall connected with the top cover, and the first beam has an outer side away from the containing space, and the first side wall protrudes from the outer side and extends along the length direction of the first beam, and in the direction of the top cover pointing to the first side wall, the groove is located below the first side wall.

10. The battery device of claim 9, wherein: The protruding part of the first side wall from the outer side has a size ranging from 20 mm to 30 mm, and in the direction of the first side wall protruding from the outer side, the size of the filling member is greater than or equal to the size of the protruding part of the first side wall.

11. The battery device of claim 9, wherein: The first beam is further provided with a second side wall extending along the length direction of the first beam, the second side wall protrudes from the outer side, in the direction of the top cover pointing to the first side wall, the second side wall is arranged below the first side wall, and the wall surface of the first side wall towards the second side wall, the wall surface of the second side wall towards the first side wall and part of the outer side form the groove.

12. The battery device of claim 11, wherein: The first side wall and the second side wall respectively extend from one end of the first beam to the opposite end, and the groove is open at both ends along the length direction.

13. The battery device of claim 11, wherein: The protruding part of the second side wall from the outer side has a size greater than the protruding part of the first side wall from the outer side, and the second side wall is provided with a plurality of connecting structures adapted to be connected with external structures.

14. The battery device of claim 11, wherein: The first side wall, the second side wall and the first beam are integrally formed.

15. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1 to 14, and the battery device is used for storing or providing electric energy.

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