Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment. The battery device comprises a box body, an upper-layer battery pack, a bottom-layer battery pack and a supporting assembly, the box body comprises a seat body and a cover body, the seat body is provided with an opening, the cover body covers the opening in the first direction, a containing cavity is defined by the cover body and the seat body, the seat body comprises a bottom wall and a plurality of side walls, and the side walls are connected to the edge of the bottom wall and define the opening; and the plurality of side walls are respectively connected with the bottom wall through curved transition sections. Each of the upper-layer battery pack and the bottom-layer battery pack comprises a plurality of single batteries; the upper battery pack and the bottom battery pack are arranged along a first direction. The supporting assemblies are positioned in the accommodating cavity and are arranged on at least one side of the bottom-layer battery pack along the second direction; the supporting assembly comprises a supporting beam and a supporting frame, the supporting beam is connected with and supports the upper-layer battery pack, the projection of the supporting beam in the first direction covers at least part of the curved transition section, and the supporting beam is connected with the bottom wall through the supporting frame. The volume energy density of the battery device can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the development of battery technology, improving the volumetric energy density of battery devices is a research direction. Utility Model Content

[0004] This application provides a battery device and an electrical appliance that can improve the volumetric energy density of the battery device.

[0005] This application provides a battery device, including a housing, an upper battery pack, a lower battery pack, and a support assembly. The housing includes a base and a cover. The base has an opening, and the cover, along a first direction, closes to the opening and surrounds the base to form a receiving cavity. The base includes a bottom wall and multiple side walls, which are connected to the edge of the bottom wall and enclose the opening. The side walls are connected to the bottom wall via curved transition sections. Both the upper and lower battery packs include multiple individual battery cells. The upper and lower battery packs are arranged along the first direction, with the upper battery pack located on the side of the lower battery pack facing away from the bottom wall along the first direction. The support assembly is located within the receiving cavity, and the lower battery pack has a support assembly on at least one side along a second direction. The support assembly includes a support beam and a support frame. The support beam connects to and supports the upper battery pack, and the projection of the support beam along the first direction covers at least a portion of the curved transition section. The support beam and the bottom wall are connected via the support frame. The first and second directions intersect.

[0006] In the above technical solution, the support beam of the support component in this embodiment can support the upper battery pack, improving the structural stability of the upper battery pack. Furthermore, by using a support frame to support the support beam, compared to a solution where the support beam is directly connected to the bottom wall, the support frame allows the support beam to be indirectly connected to the bottom wall. Moreover, the support beam is located on the side of the curved transition section away from the bottom wall along the first direction, reducing the interference of the curved transition section on the support beam in the second direction. This reduces the space occupied by the support beam in the lower battery pack in the second direction, thereby increasing the volumetric energy density of the battery device.

[0007] In some embodiments, the support frame includes a first part and a second part connected together. The first part is located on the side of the curved transition section facing the bottom battery pack in a second direction. The support beam is supported on the first part. The second part is located on the side of the first part away from the curved transition section and is connected between the bottom battery pack and the bottom wall.

[0008] In the above technical solution, the second part is set between the bottom battery pack and the bottom wall. The second part is located below the bottom battery pack, so that the second part can support the bottom battery pack, thereby sharing part of the pressure borne by the bottom wall and reducing the risk of severe deformation or damage to the bottom wall.

[0009] In some embodiments, the first part includes a first segment and a second segment connected at an angle, the first segment carrying a support beam, the second segment connected to one end of the first segment facing the bottom battery pack and disposed opposite to the curved transition segment along a second direction, the second part being connected at an angle to the second segment, and the first part and the second part being integrally disposed.

[0010] In the above technical solution, the first section, the second section, and the second part can be formed by bending the same material, which helps to reduce the manufacturing difficulty of the support frame.

[0011] In some embodiments, the second segment and the second portion are connected at an obtuse angle.

[0012] In the above technical solution, the second segment and the second part are connected at an obtuse angle, which helps to reduce the encroachment of the second segment on the space of the underlying battery pack, thereby helping to improve the volumetric energy density of the battery device.

[0013] In some embodiments, the plurality of sidewalls includes two first sidewalls disposed opposite to each other along a second direction, two support beams disposed opposite to each other along the second direction, and at least one support beam connected to the first sidewall on the same side as the bottom battery pack along the second direction on the side opposite to the bottom battery pack.

[0014] In the above technical solution, the support frame is connected to the bottom wall, and the side of the support beam is connected to the first side wall, which improves the connection strength between the support component and the base and enhances the support stability of the support component.

[0015] In some embodiments, the base further includes a first mounting plate and a second mounting plate. The first mounting plate is located on the side of the first sidewall facing away from the receiving cavity, and at least a portion of the second mounting plate is located on the side of the first mounting plate facing away from the first sidewall. The first mounting plate has a first mounting hole, and the second mounting plate has a second mounting hole. The first mounting hole and the second mounting hole are opposite to each other along a first direction. The first mounting hole and the second mounting hole are used to connect the battery device to an external device. The first mounting plate, the first sidewall, and the support beam are stacked and connected along a second direction; and / or the second mounting plate, the bottom wall, and a portion of the support frame are stacked and connected along the first direction.

[0016] In the above technical solution, the first mounting plate, the first side wall, and the support beam are stacked and connected, which helps to improve the structural stability of the support beam. The second mounting plate, the bottom wall, and part of the support frame are stacked and connected, which helps to improve the structural stability of the support frame.

[0017] In some embodiments, the battery device includes a first heat exchange plate that carries a bottom battery pack and is used for heat exchange with the bottom battery pack. A partial support frame is located between the first heat exchange plate and the bottom wall. A second mounting plate, the bottom wall, the partial support frame, and the first heat exchange plate are stacked and connected along a first direction.

[0018] In the above technical solution, the support frame is positioned between the first heat exchange plate and the bottom wall, which has almost no impact on the heat exchange between the first heat exchange plate and the underlying battery pack. Furthermore, it improves the stability of the support frame.

[0019] In some embodiments, the battery device includes a second heat exchange plate connected to a support beam, and an upper battery pack disposed on the side of the second heat exchange plate facing away from the bottom wall along a first direction, with the second heat exchange plate thermally connected to the upper battery pack.

[0020] In the above technical solution, the connection between the upper battery pack and the support beam is achieved by using the second heat exchange plate, which can make full use of the second heat exchange plate and realize the support beam for the upper battery pack.

[0021] In some embodiments, the battery device further includes a support plate connected to the side of the second heat exchange plate away from the upper battery pack, and both the second heat exchange plate and the support plate are connected to a support beam.

[0022] In the above technical solution, a support plate is set up to support the second heat exchange plate, reduce the stress and deformation of the second heat exchange plate, and improve the overall support strength for the upper battery pack.

[0023] In some embodiments, the battery device further includes a buffer pad disposed on the side of the support plate opposite to the second heat exchange plate, and the buffer pad is connected to the support beam.

[0024] The above technical solution can reduce abnormal noise between the battery pack and the underlying battery pack.

[0025] In some embodiments, the support beam includes a first plate structure and a second plate structure. The first plate structure includes a first main body, a first extension, and a second extension. The first extension and the second extension are respectively connected at an angle to both ends of the first main body along a first direction and are both located on the side of the first main body facing the bottom battery pack along a second direction. The second plate structure includes a second main body, a third extension, and a fourth extension. The third extension and the fourth extension are respectively connected at an angle to both ends of the second main body along the first direction and are both located on the side of the second main body away from the bottom battery pack along the second direction. The first main body is located on the side of the second main body away from the bottom battery pack. The first extension and the third extension are stacked and connected, and the second extension, the fourth extension, and the first part are stacked and connected.

[0026] In the above technical solution, the support beam is configured to include a first plate structure and a second plate structure. The support beam structure formed by the first plate structure and the second plate structure is simple and improves processing efficiency.

[0027] In some embodiments, the first main body portion has a first sub-protrusion protruding toward the second main body portion, and the first main body portion is connected to the second main body portion through the first sub-protrusion; and / or, the second main body portion has a second sub-protrusion protruding toward the first main body portion, and the second main body portion is connected to the first main body portion through the second sub-protrusion.

[0028] In the above technical solution, a first sub-protrusion and / or a second sub-protrusion are provided, that is, the support beam is not only connected at the first extension and the third extension, and at the second extension and the fourth extension, but also at the first sub-protrusion and / or the second sub-protrusion, thereby improving the structural strength of the support beam itself.

[0029] In some embodiments, the battery device further includes a first limiting beam and a second limiting beam, which are disposed on opposite sides of the upper battery pack along a third direction and are used to limit the expansion and deformation of the upper battery pack. The first direction, the second direction and the third direction intersect each other.

[0030] In the above technical solution, a first limiting beam and a second limiting beam are set to limit the expansion and deformation of the upper battery pack during the charging and discharging process, thereby improving its service life and cycle performance.

[0031] In some embodiments, the first limiting beam, the second limiting beam, and the second heat exchange plate are all aluminum structures.

[0032] In the above technical solution, the first limiting beam, the second limiting beam, and the first heat exchange plate are all made of aluminum structure to facilitate welding of the three.

[0033] In some embodiments, the battery device further includes a third limiting beam and a fourth limiting beam, which are disposed on opposite sides of the bottom battery pack along a third direction and are used to limit the expansion and deformation of the bottom battery pack. The first direction, the second direction and the third direction intersect each other.

[0034] In the above technical solution, a third limiting beam and a fourth limiting beam are set to limit the expansion and deformation of the bottom battery pack during charging and discharging, thereby improving its service life and cycle performance.

[0035] In some embodiments, the third limiting beam, the fourth limiting beam, and the base are all steel structures.

[0036] In the above technical solution, the third limiting beam, the fourth limiting beam and the seat are all made of steel structure, which facilitates the welding of the three; and the seat supports the upper battery pack through the support beam. Making the seat a steel structure helps to improve the strength of the seat and reduce the risk of seat deformation.

[0037] Secondly, embodiments of this application also provide an electrical device, including the aforementioned battery device, which is used to store electrical energy or provide electrical energy. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application 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 the drawings without creative effort.

[0039] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0040] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0041] Figure 3 An exploded view of a battery device provided in some embodiments of this application;

[0042] Figure 4 This is another schematic diagram of the battery device provided in some embodiments of this application;

[0043] Figure 5 for Figure 4 The battery device shown is a cross-sectional view at point AA;

[0044] Figure 6 for Figure 5 Enlarged view at point B;

[0045] Figure 7 for Figure 6 The diagram shows the structural schematic of the support component.

[0046] Figure 8 A partial cross-sectional view of a battery device provided for some embodiments of this application;

[0047] Figure 9 This is a schematic diagram of the structure of the first limiting beam of the battery device provided in some embodiments of this application;

[0048] Figure 10 This is a schematic diagram of the structure of the third limiting beam of the battery device provided in some embodiments of this application.

[0049] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0050] 100. Vehicle; 200. Battery unit; 300. Controller; 400. Motor;

[0051] 1. Box body; 11. Base; 111. Receiving cavity; 112. Opening; 113. Bottom wall; 114. Side wall; 115. First side wall; 116. First mounting plate; 117. Second mounting plate; 118. Curved transition section; 12. Cover;

[0052] 2. Battery cell; 21. Bottom battery pack; 22. Top battery pack;

[0053] 31. Second heat exchange plate; 32. First heat exchange plate; 33. Support plate; 331. Protrusion; 332. Groove; 34. Buffer pad;

[0054] 4. Support components;

[0055] 41. Support beam; 411. First plate structure; 412. Second plate structure; 413. First main body; 414. First extension; 415. Second extension; 416. Second main body; 417. Third extension; 418. Fourth extension; 419. First sub-protrusion; 410. Second sub-protrusion;

[0056] 42. Support frame; 421. First part; 422. Second part; 423. First section; 424. Second section;

[0057] 43. First limiting beam; 44. Second limiting beam; 45. Third limiting beam; 46. Fourth limiting beam;

[0058] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In this application, "multiple" means two or more (including two).

[0066] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0067] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer, which is coated on the surface of the positive current collector. The positive current collector includes a positive electrode coating area and a positive electrode tab connected to the coating area. The coating area is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery cell as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0068] For battery devices with two layers of individual cells, the upper cell is typically supported by a support beam for stability. However, for stamped bases, if the support beam is directly mounted on the bottom wall, its connection strength with the bottom wall will be affected by the constraints of the corner area of ​​the base.

[0069] In related technologies, battery devices typically include a housing and individual battery cells housed within the housing. The housing includes a base and a cover that encloses the base. The base typically includes a bottom wall and side walls connected to the edge of the bottom wall. The connection between the bottom wall and the side walls often forms a curved transition section with an arc or rounded corner to facilitate demolding during manufacturing. For battery devices with a double-layer structure, a support beam is usually required to support the upper battery pack. While connecting the support beam to the curved transition section can minimize the space within the base for battery cells, the connection between the curved transition section and the support beam is difficult, potentially increasing manufacturing complexity or reducing the stability of the support beam. Conversely, adding a support beam to avoid the curved transition section would cause the support beam to occupy more space within the base, resulting in a decrease in the volumetric energy density of the battery device.

[0070] In view of this, this application provides a battery device that uses a support component to support the upper battery pack. Furthermore, by setting a support frame on the side of the support beam near the bottom wall and connecting the support frame to the bottom wall, the support beam is indirectly connected to the bottom wall, reducing the interference of the curved transition section on the support beam. The support beam is set on the side of the curved transition section away from the bottom wall in the first direction, thereby reducing the space occupied by the support beam inward in the second direction and improving the volumetric energy density of the battery device.

[0071] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0072] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0073] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0074] like Figure 1 As shown, a battery device 200 is provided inside the vehicle 100. The battery device 200 can be located at the bottom, front, or rear of the vehicle 100. The battery device 200 can be used to power the vehicle 100; for example, the battery device 200 can serve as the operating power source for the vehicle 100.

[0075] The vehicle 100 may also include a controller 300 and a motor 400. The controller 300 is used to control the battery device 200 to supply power to the motor 400, for example, for the power needs of the vehicle 100 during startup, navigation and driving.

[0076] In some embodiments of this application, the battery device 200 can not only serve as the operating power source for the vehicle 100, but also as the driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0077] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 3 An exploded view of a battery device provided in some embodiments of this application; Figure 4 This is another schematic diagram of the battery device provided in some embodiments of this application; Figure 5 for Figure 4 The battery device shown is a cross-sectional view at point AA; Figure 6 for Figure 5 Enlarged view at point B.

[0078] like Figures 2-6 As shown, this application embodiment provides a battery device 200, including a housing 1, a bottom battery pack 21, an upper battery pack 22, and a support assembly 4. The housing 1 includes a base 11 and a cover 12. The base 11 has an opening 112, and the cover 12 covers the opening 112 along a first direction X and surrounds the base 11 to form a receiving cavity 111. The base 11 includes a bottom wall 113 and multiple side walls 114. The multiple side walls 114 are connected to the edge of the bottom wall 113 and surround the opening 112. The multiple side walls 114 are respectively connected to the bottom wall 113 through curved transition sections 118. The upper battery pack 22 and the bottom battery pack 21 each include multiple battery cells 2. The upper battery pack 22 and the bottom battery pack 21 are arranged along the first direction X, and the upper battery pack 22 is located on the side of the bottom battery pack 21 opposite to the bottom wall 113 along the first direction X. The support assembly 4 is located in the receiving cavity 111. The bottom battery pack 21 is provided with the support assembly 4 on at least one side along the second direction Y. The support assembly 4 includes a support beam 41 and a support frame 42. The support beam 41 connects to and supports the upper battery pack 22, and the projection of the support beam 41 along the first direction X covers at least part of the curved transition section 118. The support beam 41 and the bottom wall 113 are connected by the support frame 42. The first direction X intersects with the second direction Y.

[0079] The sidewall 114 and bottomwall 113 of this embodiment can be formed by a stamping process. A stamping process refers to the process of applying pressure to sheet metal, strip metal, tubes, etc., using a die installed on a stamping machine (usually a punch press), causing plastic deformation or separation, thereby obtaining a part (or semi-finished product) with the required shape, size and performance.

[0080] In this embodiment, the bottom wall 113 and the side wall 114 can be connected at an obtuse angle or at a right angle, but they are connected by a curved transition section 118.

[0081] For example, the bottom wall 113 and the side wall 114 are set at an obtuse angle, which means that the plane of the part of the bottom wall 113 near the curved transition section 118 and the plane of the part of the side wall 114 near the curved transition section 118 form an obtuse angle greater than 90°.

[0082] Optionally, there are four side walls 114, which are arranged to form an opening 112. The side walls 114 and the bottom wall 113 are connected at obtuse angles.

[0083] The cross-sectional shape of the curved transition section 118 in this embodiment can be arc-shaped or other curved shapes.

[0084] In this embodiment, the bottom battery pack 21 refers to the battery pack closest to the bottom wall 113. The upper battery pack 22 is located on the side of the bottom battery pack 21 away from the bottom wall 113. It can be the topmost battery pack, or it can be located above the bottom battery pack 21 instead of the topmost battery pack.

[0085] The upper battery pack 22 and the lower battery pack 21 mentioned in the embodiments of this application may each include one or more battery cell assemblies for providing voltage and capacity. Each battery cell assembly includes multiple battery cells 2, which are connected in series, parallel, or mixed connections via a busbar.

[0086] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 2; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 2 into an independent module. As an example, a battery module can be formed by bundling multiple battery cells 2 together with cable ties.

[0087] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing 1.

[0088] As an example, the battery cell assembly can also be housed in the housing 1 by directly fixing multiple battery cells 2 to the housing.

[0089] In this embodiment, the support beam 41 is a long strip structure with its length direction being the third direction Z, wherein the first direction X, the second direction Y, and the third direction Z intersect each other. Optionally, the first direction X and the second direction Y are arranged perpendicularly. Further, the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other.

[0090] In this embodiment, the support beam 41 is supported by the support frame 42, that is, at least part of the support beam 41 is located above the support frame 42. Specifically, the two can be connected by welding, riveting or bolting.

[0091] In this embodiment, the upper battery pack 22 is supported by the support beam 41. For example, the upper battery pack 22 is indirectly connected to the support beam 41 through a support structure.

[0092] In this embodiment, the support beam 41 of the support assembly 4 provides strong support for the upper battery pack 22, improving the structural stability of the upper battery pack 22. Furthermore, by using the support frame 42 to support the support beam 41, compared to a scheme where the support beam 41 is directly connected to the bottom wall 113, the support frame 42 allows the support beam 41 to be indirectly connected to the bottom wall 113. Moreover, the support beam 41 is located on the side of the curved transition section 118 facing away from the bottom wall 113 along the first direction X, reducing the interference of the curved transition section 118 on the support beam 41 in the second direction Y. This reduces the space occupied by the support beam 41 in the lower battery pack in the second direction Y, thereby increasing the volumetric energy density of the battery device.

[0093] In some embodiments, the support frame 42 includes a first part 421 and a second part 422. The first part 421 is located on the side of the curved transition section 118 facing the bottom battery pack 21 along the second direction Y. The support beam 41 is supported on the first part 421. The second part 422 is located on the side of the first part 421 away from the curved transition section 118 and is connected between the bottom battery pack 21 and the bottom wall 113.

[0094] The support frame 42 in this embodiment includes a first part 421 and a second part 422 connected together. The first part 421 and the second part 422 can be integrally formed or assembled and connected, for example, by welding. Optionally, the first part 421 and the second part 422 are integrally formed.

[0095] In this embodiment, the first portion 421 is located on the side of the curved transition section 118 facing the bottom battery pack 21 along the second direction Y. That is, the projection of the first portion 421 along the second direction Y onto the curved transition section 118 covers at least a portion of the curved transition section 118. For example, the first portion 421 and the curved transition section 118 may be spaced apart or offset from each other.

[0096] In this embodiment, the support beam 41 is supported by the first part 421, and at least a portion of the support beam 41 is located above the first part 421. Specifically, the two can be connected by welding, riveting, or bolting.

[0097] The second part 422 of this embodiment is connected between the bottom battery pack 21 and the bottom wall 113, that is, the second part 422 is located between the bottom battery pack 21 and the bottom wall 113, and the projections of the bottom battery pack 21 and the second part 422 on the bottom wall 113 along the first direction X overlap.

[0098] The second part 422 can be directly connected to the bottom wall 113 or indirectly connected to the bottom wall 113. The second part 422 can be directly connected to the bottom battery pack 21 or indirectly connected to the bottom battery pack 21.

[0099] The second part 422 is disposed between the bottom battery pack 21 and the bottom wall 113. The second part 422 is located below the bottom battery pack 21, so that the second part 422 can support the bottom battery pack, thereby sharing part of the pressure borne by the bottom wall 113 and reducing the risk of severe deformation or damage to the bottom wall 113.

[0100] Figure 7 for Figure 6 The diagram shows the structure of the support component.

[0101] Please see Figure 7 In some embodiments, the first part 421 includes a first segment 423 and a second segment 424 connected at an angle. The first segment 423 carries the support beam 41. The second segment 424 is connected to the end of the first segment 423 near the bottom battery pack 21 and is disposed opposite to the curved transition segment 118 along the second direction Y. The second part 422 is connected at an angle to the second segment 424. The first part 421 and the second part 422 are integrally disposed.

[0102] In this embodiment, the first segment 423, the second segment 424, and the second part 422 can all be plate-shaped structures.

[0103] The first segment 423 is connected to the second segment 424 at an angle; the first segment 423 and the second segment 424 can be connected at an acute angle, an obtuse angle, or a right angle. The second segment 424 is connected to the second part 422 at an angle; the second segment 424 and the second part 422 can be connected at an acute angle, an obtuse angle, or a right angle.

[0104] In this embodiment, the first part 421 and the second part 422 are integrally formed, that is, the first segment 423, the second segment 424 and the second part 422 are connected by integral molding, rather than being assembled by subsequent connection means.

[0105] The first part 421 is configured to include a first segment 423 and a second segment 424, thereby forming a roughly Z-shaped structure for the support frame 42. This structure provides good support, and the second segment 424 is connected to the end of the first segment 423 facing the bottom battery pack 21, reducing interference with the curved transition section 118 and improving the tolerance of the support assembly 4 when installed in the base 11. The first segment 423, the second segment 424, and the second part 422 can be formed by bending the same material, which helps to reduce the manufacturing difficulty of the support frame 42.

[0106] In some embodiments, the second segment 424 and the second portion 422 are connected at an obtuse angle.

[0107] In this embodiment, the obtuse angle connection between the second segment 424 and the second part 422 means that the angle formed by the plane containing the second segment 424 and the plane containing the second part 422 is an obtuse angle.

[0108] Optionally, the first segment 423 and the second segment 424 are set at an obtuse angle and smoothly connected, and the second segment 424 and the second part 422 are smoothly connected.

[0109] With this configuration, the second segment 424 and the second part 422 connected at the obtuse angle have stronger resistance to deformation, lower stress concentration, are less prone to deformation at the corner, and have better stability.

[0110] In some embodiments, the plurality of sidewalls 114 include two first sidewalls 115 disposed opposite to each other along the second direction Y, two support beams 41 disposed opposite to each other along the second direction Y, and at least one support beam 41 is connected to the first sidewall 115 on the same side as the bottom battery pack 21 along the second direction Y.

[0111] In this embodiment, the support beam 41 is connected to the first side wall 115, and the two can be connected by welding, bonding or other methods.

[0112] The side of the support beam 41 facing away from the bottom battery pack 21 is connected to the first side wall 115. In this way, the support frame 42 is connected to the bottom wall 113, and the side of the support beam 41 is connected to the first side wall 115, which improves the connection strength between the support assembly 4 and the base 11 and improves the support stability of the support assembly 4.

[0113] In some embodiments, the base 11 further includes a first mounting plate 116 and a second mounting plate 117. The first mounting plate 116 is located on the side of the first sidewall 115 away from the receiving cavity 111, and at least a portion of the second mounting plate 117 is located on the side of the first mounting plate 116 away from the first sidewall 115. The first mounting plate 116 is provided with a first mounting hole, and the second mounting plate 117 is provided with a second mounting hole. The first mounting hole and the second mounting hole are opposite to each other along a first direction X. The first mounting hole and the second mounting hole are used to connect the battery device 200 to an external device. The first mounting plate 116, the first sidewall 115, and the support beam 41 are stacked and connected along a second direction Y. And / or, the second mounting plate 117, the bottom wall 113, and a portion of the support frame 42 are stacked and connected along a first direction X.

[0114] The first mounting hole and the second mounting hole are opposite each other along the first direction X so that the mounting structure can be inserted therein. The mounting structure is used to install the battery device 200 onto an external device, such as a vehicle 100.

[0115] Optionally, there are multiple first mounting holes and multiple second mounting holes, with the multiple first mounting holes and multiple second mounting holes arranged one-to-one relative to each other along the first direction X.

[0116] In this embodiment, the first mounting plate 116, the first side wall 115, and the support beam 41 are stacked and connected. That is, the first mounting plate 116, the first side wall 115, and the support beam 41 have a connection area opposite to each other in the stacking direction so that the three can be connected in the connection area. The specific connection method can be welding, riveting, etc.

[0117] Optionally, the second mounting plate 117 has a third sub-protrusion protruding toward the first mounting plate 116, and the second mounting plate 117 is connected to the first mounting plate 116 through the third sub-protrusion. Optionally, the third sub-protrusion is formed by a stamping process. Optionally, the second mounting plate 117, the first mounting plate 116, the first sidewall 115, and the support beam 41 are stacked and connected.

[0118] In this embodiment, the second mounting plate 117, the bottom wall 113, and the partial support frame 42 are stacked and connected along the first direction X. That is, the second mounting plate 117, the bottom wall 113, and the partial support frame 42 (which can be the second part 422 mentioned above) have a connection area opposite to each other in the stacking direction so that the three can be connected in the connection area. The specific connection method can be welding, riveting, etc.

[0119] This configuration can improve the connection strength between the support beam 41 and the base 11, or improve the connection strength between the support frame 42 and the base 11.

[0120] In some embodiments, the battery device includes a first heat exchange plate 32, which carries the bottom battery pack 21 and is used for heat exchange with the bottom battery pack 21. A partial support frame 42 is located between the first heat exchange plate 32 and the bottom wall 113. The second mounting plate 117, the bottom wall 113, the partial support frame 42 and the first heat exchange plate 32 are stacked and connected along the first direction X.

[0121] In this embodiment, the first heat exchange plate 32 has a heat exchange liquid flowing inside, which can cool or heat the bottom battery pack 21.

[0122] In this embodiment, the term "bearing" as mentioned above or below indicates a force relationship between two objects, where one object provides support to the other. The two objects can be in direct or indirect contact, for example, with other objects placed between them.

[0123] In this embodiment, the second mounting plate 117, bottom wall 113, partial support frame 42, and first heat exchange plate 32 are stacked and connected along the first direction X. That is, the second mounting plate 117, bottom wall 113, partial support frame 42, and first heat exchange plate 32 have opposite connection areas in the stacking direction so that the four can be connected in the connection area. The specific connection method can be welding, riveting, etc. Among them, the partial support frame 42 can be the second part 422 mentioned above.

[0124] Optionally, the first heat exchange plate 32 is welded to the second part 422, the bottom wall 113 and the second mounting plate 117 by rivet spot welding.

[0125] The support frame 42 is positioned between the first heat exchange plate 32 and the bottom wall 113, which hardly affects the heat exchange of the first heat exchange plate 32 with the bottom battery pack 21. In addition, it can improve the stability of the support frame 42 in the housing 1.

[0126] In some embodiments, the battery device 200 includes a second heat exchange plate 31, which is connected to a support beam 41. An upper battery pack 22 is disposed on the side of the second heat exchange plate 31 facing away from the bottom wall 113 along a first direction X. The second heat exchange plate 31 is thermally connected to the upper battery pack 22.

[0127] In this embodiment, the second heat exchange plate 31 may be provided with a heat exchange liquid. The heat exchange liquid is used to exchange heat with the upper battery pack 22. It can heat the upper battery pack 22 or cool the upper battery pack 22.

[0128] In this embodiment, the second heat exchange plate 31 is thermally connected to the upper battery pack 22. The second heat exchange plate 31 can directly abut against the upper battery pack 22, or it can indirectly transfer heat through other components.

[0129] The connection between the upper battery pack 22 and the support beam 41 is achieved by using the second heat exchange plate 31, which can make full use of the second heat exchange plate 31 to support the upper battery pack 22 with the support beam 41.

[0130] Figure 8 A partial cross-sectional view of a battery device provided for some embodiments of this application.

[0131] Please see Figure 8 In some embodiments, the battery device 200 further includes a support plate 33, which is connected to the side of the second heat exchange plate 31 away from the upper battery pack 22. Both the second heat exchange plate 31 and the support plate 33 are connected to the support beam 41.

[0132] The support plate 33 is provided to support the second heat exchange plate 31, reduce the stress and deformation of the second heat exchange plate 31, and improve the overall support strength of the upper battery pack 22.

[0133] Optionally, the support plate 33 is provided with a protrusion 331 that protrudes towards the bottom wall 113 and a groove 332 that corresponds to the protrusion 331 in its thickness direction. This configuration can improve the structural strength of the support plate 33.

[0134] For example, the convex 331 and the groove 332 are formed by a stamping process.

[0135] In this embodiment, the convex hull 331 can be elongated, and there can be multiple convex hulls 331. The multiple convex hulls 331 are arranged at intervals along the second direction Y or the third direction Z.

[0136] Optionally, the second heat exchange plate 31 has a flange extending in a direction away from the bottom wall 113 along its edge in the second direction Y. The flange can improve the structural strength of the second heat exchange plate 31.

[0137] In some embodiments, the battery device 200 further includes a buffer pad 34, which is disposed on the side of the support plate 33 away from the second heat exchange plate 31 and is connected to the support beam 41.

[0138] The cushioning pad 34 in this embodiment can be made of rubber or foam materials, etc.

[0139] In this embodiment, the buffer pad 34 can be connected to the support beam 41 by means of riveting or threaded connection.

[0140] In this embodiment, the buffer pad 34 can be spaced apart from the bottom battery pack 21 or in direct contact. With the spaced-apart arrangement, when the support plate 33 deforms (e.g., elastically deforms), the buffer pad 34 can provide cushioning, reducing the impact force between the upper battery pack 22 and the bottom battery pack 21. With direct contact, the buffer pad 34 helps reduce the possibility of wear when the upper battery pack 22 and the bottom battery pack 21 move relative to each other.

[0141] The buffer pad 34 can reduce noise between the device and the underlying battery pack 21.

[0142] Optionally, the second heat exchange plate 31 is provided with an insulating coating on both opposite sides in the first direction X.

[0143] Please continue reading. Figure 6 and Figure 7In some embodiments, the support beam 41 includes a first plate structure 411 and a second plate structure 412. The first plate structure 411 includes a first main body portion 413, a first extension portion 414, and a second extension portion 415. The first extension portion 414 and the second extension portion 415 are respectively connected at an angle to both ends of the first main body portion 413 along the first direction X, and are both located on the side of the first main body portion 413 facing the bottom battery pack 21 along the second direction Y. The second plate structure 412 includes a second main body portion 416 and a third extension portion 417. The fourth extension 418, the third extension 417 and the fourth extension 418 are respectively connected at an angle to both ends of the second main body 416 along the first direction X, and are all located on the side of the second main body 416 away from the bottom battery pack 21 along the second direction Y. The first main body 413 is located on the side of the second main body 416 away from the bottom battery pack 21. The first extension 414 and the third extension 417 are stacked and connected. The second extension 415, the fourth extension 418 and the first part 421 are stacked and connected.

[0144] In this embodiment, the first extension 414 and the second extension 415 are respectively connected to the first main body 413 at an angle. The first extension 414 can be connected to the first main body 413 at an acute angle, an obtuse angle, or a right angle. The same applies to the second extension 415 and the first main body 413.

[0145] Optionally, the first extension 414 is connected to the first main body 413 at an obtuse angle, and the second extension 415 is connected to the first main body 413 at an obtuse angle.

[0146] In this embodiment, the third extension 417 and the fourth extension 418 are respectively connected to the second main body 416 at an angle. The third extension 417 can be connected to the second main body 416 at an acute angle, an obtuse angle, or a right angle. The same applies to the fourth extension 418 and the second main body 416.

[0147] Optionally, both the third extension 417 and the fourth extension 418 are connected at right angles to the second main body 416. Here, "connected at right angles" means that they can be considered perpendicular to each other within the allowable range of machining errors.

[0148] For example, the first extension 414, the third extension 417, and the second heat exchange plate 31 are stacked and connected, with the second heat exchange plate 31 located above the first extension 414 and the third extension 417. Either the first extension 414 or the third extension 417 can be on the bottom side. Optionally, the first extension 414, the third extension 417, and the second heat exchange plate 31 are threaded together or riveted together.

[0149] In this embodiment, the second extension 415, the fourth extension 418, and the first portion 421 are stacked and connected. The first portion 421 is located below the second extension 415 and the fourth extension 418, and either the second extension 415 or the fourth extension 418 can be on the upper side. Optionally, the second extension 415, the fourth extension 418, and the first portion 421 are welded together.

[0150] In this embodiment, the first plate structure 411 and the second plate structure 412 are arranged to form a ring structure.

[0151] The support beam 41 is configured to include a first plate structure 411 and a second plate structure 412. The support beam 41 formed by the first plate structure 411 and the second plate structure 412 has a simple structure and improves processing efficiency.

[0152] In some embodiments, the first main body portion 413 is provided with a first sub-protrusion 419 protruding toward the second main body portion 416, and the first main body portion 413 is connected to the second main body portion 416 through the first sub-protrusion 419; and / or, the second main body portion 416 is provided with a second sub-protrusion 410 protruding toward the first main body portion 413, and the second main body portion 416 is connected to the first main body portion 413 through the second sub-protrusion 410.

[0153] In this embodiment, the first sub-protrusion 419 can be a structure assembled and connected to the first main body 413, or it can be integrally formed with the first main body 413, for example, by a stamping process. The second sub-protrusion 410 is formed in the same way.

[0154] Optionally, the area corresponding to the first sub-protrusion 419 in the second direction Y is the first groove, and the area corresponding to the second sub-protrusion 410 in the second direction Y is the second groove.

[0155] Optionally, the first sub-protrusion 419 and the second sub-protrusion 410 are arranged in pairs and welded together, and the first main body 413 and the second main body 416 are connected through the connected first sub-protrusion 419 and the second sub-protrusion 410.

[0156] The first sub-protrusion 419 and / or the second sub-protrusion 410 are provided, that is, the support beam 41 is not only connected at the first extension 414 and the third extension 417, the second extension 415 and the fourth extension 418, but also at the first sub-protrusion 419 and / or the second sub-protrusion 410, thereby improving the structural strength of the support beam 41 itself.

[0157] Figure 9 This is a schematic diagram of the structure of the first limiting beam of the battery device provided in some embodiments of this application; Figure 10 This is a schematic diagram of the structure of the third limiting beam of the battery device provided in some embodiments of this application.

[0158] Please see Figure 3 , Figure 9 and Figure 10 In some embodiments, the battery device 200 further includes a first limiting beam 43 and a second limiting beam 44, which are disposed on opposite sides of the upper battery pack 22 along the third direction Z and are used to limit the expansion and deformation of the upper battery pack 22. The first direction X, the second direction Y and the third direction Z intersect each other.

[0159] In this embodiment, the first limiting beam 43 and the second limiting beam 44 sandwich the upper battery pack 22 between them to restrict the expansion of the individual battery cells 2. For example, the thickness direction of the individual battery cells 2 in the upper battery pack 22 is the third direction Z.

[0160] For example, both the first limiting beam 43 and the second limiting beam 44 are connected to the support beam 41. The side of the first limiting beam 43 near the bottom wall 113 and the side of the second limiting beam 44 near the bottom wall 113 are both welded to the second heat exchange plate 31. Furthermore, the two ends of the first limiting beam 43 along the second direction Y and the two ends of the second limiting beam 44 along the second direction Y can be connected to the two support beams 41 by means of riveting or threaded connection.

[0161] Optionally, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0162] The first limiting beam 43 and the second limiting beam 44 are provided to limit the expansion and deformation of the upper battery pack 22 during the charging and discharging process, thereby improving its service life and cycle performance.

[0163] In some embodiments, the first limiting beam 43, the second limiting beam 44, and the second heat exchange plate 31 are all aluminum structures.

[0164] In this embodiment, the first limiting beam 43 and the second limiting beam 44 can be aluminum extrusion structures.

[0165] The first limiting beam 43, the second limiting beam 44, and the second heat exchange plate 31 are all made of aluminum to facilitate welding of the three components.

[0166] In some embodiments, the battery device 200 further includes a third limiting beam 45 and a fourth limiting beam 46, which are disposed on opposite sides of the bottom battery pack 21 along the third direction Z and are used to limit the expansion and deformation of the bottom battery pack 21. The first direction X, the second direction Y and the third direction Z intersect each other.

[0167] In this embodiment, the third limiting beam 45 and the fourth limiting beam 46 sandwich the bottom battery pack 21 between them to limit the expansion and deformation of the battery cells 2. For example, the thickness direction of the battery cells 2 in the bottom battery pack 21 is the third direction Z.

[0168] Optionally, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0169] Optionally, the third limiting beam 45 is welded to the side wall 114 on the side away from the bottom battery pack 21, and the fourth limiting beam 46 is welded to the side wall 114 on the side away from the bottom battery pack 21.

[0170] The third limiting beam 45 and the fourth limiting beam 46 are provided to limit the expansion and deformation of the bottom battery pack 21 during charging and discharging, thereby improving its service life and cycle performance.

[0171] In some embodiments, the third limiting beam 45, the fourth limiting beam 46, and the seat 11 are all steel structures.

[0172] Optionally, both the third limiting beam 45 and the fourth limiting beam 46 are welded to the seat body 11. Further, the two ends of the third limiting beam 45 along the second direction Y are respectively welded to the two first sidewalls 115, and the two ends of the fourth limiting beam 46 along the second direction Y are respectively welded to the two first sidewalls 115.

[0173] The third limiting beam 45, the fourth limiting beam 46 and the seat 11 are all made of steel, which facilitates welding of the three; and the seat 11 supports the upper battery pack 22 through the support beam 41. Making the seat 11 of steel helps to improve the strength of the seat 11 and reduce the risk of deformation of the seat 11.

[0174] This application embodiment also provides an electrical device, including the battery device 200 described above, which is used to store electrical energy or provide electrical energy.

[0175] Please see Figures 2-7This application provides a battery device 200, including a housing 1, a bottom battery pack 21, an upper battery pack 22, and a support assembly 4. The housing 1 includes a base 11 and a cover 12. The base 11 has an opening 112, and the cover 12 covers the opening 112 along a first direction X and surrounds the base 11 to form a receiving cavity 111. The base 11 includes a bottom wall 113 and multiple side walls 114. The multiple side walls 114 are connected to the edge of the bottom wall 113 and surround the opening 112. The multiple side walls 114 are respectively connected to the bottom wall 113 through curved transition sections 118. The upper battery pack 22 and the bottom battery pack 21 each include multiple battery cells 2. The upper battery pack 22 and the bottom battery pack 21 are arranged along the first direction X, and the upper battery pack 22 is located on the side of the bottom battery pack 21 opposite to the bottom wall 113 along the first direction X. Support assembly 4 is located in receiving cavity 111. Support assembly 4 is provided on at least one side of the bottom battery pack 21 along the second direction Y. Support assembly 4 includes support beam 41 and support frame 42. Support beam 41 connects to and supports upper battery pack 22, and the projection of support beam 41 along the first direction X covers at least part of curved transition section 118. Support beam 41 and bottom wall 113 are connected by support frame 42. The first direction X intersects the second direction Y. Support frame 42 includes a first part 421 and a second part 422. The first part 421 is located on the side of curved transition section 118 facing the bottom battery pack 21 along the second direction Y. Support beam 41 is supported by the first part 421. The second part 422 is located on the side of the first part 421 away from curved transition section 118 and is connected between bottom battery pack 21 and bottom wall 113. The first part 421 includes a first segment 423 and a second segment 424 connected at an angle. The first segment 423 carries the support beam 41. The second segment 424 is connected to the end of the first segment 423 near the bottom battery pack 21 and is disposed opposite to the curved transition section 118 along the second direction Y. The second part 422 is connected to the second segment 424 at an angle. The first part 421 and the second part 422 are integrally formed. The second segment 424 and the second part 422 are connected at an obtuse angle. The plurality of sidewalls 114 include two first sidewalls 115 disposed opposite to each other along the second direction Y, two support beams 41 disposed opposite to each other along the second direction Y, and at least one support beam 41 is connected to the first sidewall 115 on the same side along the second direction Y away from the bottom battery pack 21.

[0176] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body, the box body comprising a base body and a cover body, the base body having an opening, the cover body being closed to the opening along a first direction and forming a containing cavity with the base body, the base body comprising a bottom wall and a plurality of side walls, the plurality of side walls being connected to edges of the bottom wall and enclosing the opening, and each of the plurality of side walls being connected to the bottom wall through a curved transition section; an upper layer battery pack and a bottom layer battery pack, each of the upper layer battery pack and the bottom layer battery pack comprising a plurality of battery cells, the upper layer battery pack and the bottom layer battery pack being arranged along the first direction, and the upper layer battery pack being located on a side of the bottom layer battery pack away from the bottom wall along the first direction; a support assembly located in the containing cavity, the bottom layer battery pack being provided with the support assembly on at least one side along a second direction, the support assembly comprising a support beam and a support frame, the support beam being connected to and supporting the upper layer battery pack, a projection of the support beam along the first direction covering at least part of the curved transition section, and the support beam and the bottom wall being connected through the support frame, and the first direction intersecting the second direction.

2. The battery device according to claim 1, characterized by The support frame comprises a first part and a second part connected to each other, the first part being located on a side of the curved transition section facing the bottom layer battery pack along the second direction, the support beam being carried on the first part, and the second part being located on a side of the first part away from the curved transition section and connected between the bottom layer battery pack and the bottom wall.

3. The battery device of claim 2, wherein, The first part comprises a first segment and a second segment connected at an angle, the first segment carrying the support beam, the second segment being connected to an end of the first segment facing the bottom layer battery pack and being oppositely arranged to the curved transition section along the second direction, and the second part being connected to the second segment at an angle. The first part and the second part are integrally arranged.

4. The battery device of claim 3, wherein The second segment and the second part are connected at an obtuse angle.

5. The battery device of claim 1, wherein The plurality of side walls comprises two first side walls oppositely arranged along the second direction, two support beams oppositely arranged along the second direction, and at least one support beam being connected to the first side wall on the same side as the support beam on the same side along the second direction away from the bottom layer battery pack.

6. The battery device of claim 5, wherein, The base body further comprises a first mounting plate and a second mounting plate, the first mounting plate being located on a side of the first side wall away from the containing cavity, at least part of the second mounting plate being located on a side of the first mounting plate away from the first side wall, the first mounting plate being provided with a first mounting hole, the second mounting plate being provided with a second mounting hole, the first mounting hole and the second mounting hole being oppositely arranged along the first direction, and the first mounting hole and the second mounting hole being used for connecting the battery device with an external device; The first mounting plate, the first side wall and the support beam are arranged and connected in layers along the second direction; and / or The second mounting plate, the bottom wall and part of the support frame are arranged and connected in layers along the first direction.

7. The battery device of claim 6, wherein The battery device comprises a first heat exchange plate, the first heat exchange plate carries the bottom layer battery pack and is used for heat exchange with the bottom layer battery pack, part of the support frame is located between the first heat exchange plate and the bottom wall, the second mounting plate, the bottom wall, part of the support frame and the first heat exchange plate are stacked and connected along the first direction.

8. The battery device of claim 1, wherein, The battery device comprises a second heat exchange plate, the second heat exchange plate is connected to the support beam, the upper layer battery pack is arranged on the side of the second heat exchange plate away from the bottom wall along the first direction, and the second heat exchange plate is in thermal connection with the upper layer battery pack.

9. The battery device of claim 8, wherein, The battery device further comprises a support plate, the support plate is connected to the side of the second heat exchange plate away from the upper layer battery pack, and the second heat exchange plate and the support plate are both connected to the support beam.

10. The battery device of claim 9, wherein, The battery device further comprises a buffer pad, the buffer pad is arranged on the side of the support plate away from the second heat exchange plate, and the buffer pad is connected to the support beam.

11. The battery device according to any one of claims 2 to 4, wherein The support beam comprises a first plate structure and a second plate structure, the first plate structure comprises a first main body part, a first extension part and a second extension part, the first extension part and the second extension part are respectively connected to the two ends of the first main body part along the first direction at an angle, and are located on the side of the first main body part facing the bottom layer battery pack along the second direction, The second plate structure comprises a second main body part, a third extension part and a fourth extension part, the third extension part and the fourth extension part are respectively connected to the two ends of the second main body part along the first direction at an angle, and are located on the side of the second main body part away from the bottom layer battery pack along the second direction, the first main body part is located on the side of the second main body part away from the bottom layer battery pack, the first extension part and the third extension part are stacked and connected, and the second extension part, the fourth extension part and the first part are stacked and connected.

12. The battery device of claim 11, wherein, The first main body part is provided with a first sub-protruding part protruding towards the second main body part, and the first main body part is connected to the second main body part through the first sub-protruding part; and / or, The second main body part is provided with a second sub-protruding part protruding towards the first main body part, and the second main body part is connected to the first main body part through the second sub-protruding part.

13. The battery device according to any one of claims 8 to 10, wherein The battery device further comprises a first limiting beam and a second limiting beam, the first limiting beam and the second limiting beam are arranged on the opposite sides of the upper layer battery pack along a third direction and are used for limiting the expansion deformation of the upper layer battery pack, and the first direction, the second direction and the third direction intersect with each other.

14. The battery device of claim 13, wherein, The first limiting beam, the second limiting beam and the second heat exchange plate are all aluminum structures.

15. The battery device according to any one of claims 1 to 10, wherein The battery device further comprises a third limiting beam and a fourth limiting beam, the third limiting beam and the fourth limiting beam are arranged on the opposite sides of the bottom layer battery pack along a third direction and are used for limiting the expansion deformation of the bottom layer battery pack, and the first direction, the second direction and the third direction intersect with each other.

16. The battery device of claim 15, wherein, The third limiting beam, the fourth limiting beam and the seat body are all steel structures.

17. An electrical device, characterized by A battery device as claimed in any one of claims 1 to 16 for storing or providing electrical energy.

Images