Battery device, power utilization device and energy storage device

Abstract

The utility model provides a battery device, a power utilization device and an energy storage device. A box body assembly comprises a lower box body and an upper box body, the lower box body comprises a bottom plate and a front plate connected with the bottom plate; the upper box body comprises a top plate arranged opposite to the bottom plate, a first transverse plate and a second transverse plate which are connected with the top plate and arranged oppositely, and a rear plate which is connected with the top plate, the first transverse plate and the second transverse plate and arranged opposite to the front plate. The bottom plate, the front plate, the top plate, the first transverse plate, the second transverse plate and the rear plate jointly define a containing space, and the battery monomer assembly is arranged in the containing space. Thus, the lower box body can be arranged to be of a single-face side plate structure, the upper box body can be arranged to be of a three-face side plate structure, the structure of the lower box body can be simplified, the occupied space on the bottom plate is reduced, and therefore the space utilization rate of the box body assembly is increased.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery device, an electrical device, and an energy storage device. Background Art

[0002] A typical battery typically consists of a battery cell assembly and a housing assembly that houses the battery cell assembly. The housing assembly typically consists of a lower housing and an upper housing, which can be closed together to form a closed space for the battery cell assembly. However, existing housing assemblies have low space utilization and are unable to meet the increasing energy storage demands of current batteries. Utility Model Content

[0003] The present application provides a battery device, an electrical device, and an energy storage device, aiming to solve the technical problem of low space utilization of the box assembly of the existing battery device.

[0004] In order to solve the above problems, the present application provides a battery device on the one hand, which includes: a battery cell assembly and a box assembly; the box assembly includes: a lower box and an upper box; the lower box includes: a bottom plate and a front plate connected to the bottom plate; the upper box includes: a top plate arranged opposite to the bottom plate, a first horizontal plate and a second horizontal plate both connected to the top plate and arranged opposite to each other, and a back plate respectively connected to the top plate, the first horizontal plate and the second horizontal plate and arranged opposite to the front plate; wherein, at least one of the first horizontal plate, the second horizontal plate and the back plate is connected to the side surface of the bottom plate; at least one of the top plate, the first horizontal plate and the second horizontal plate is connected to the side surface of the front plate; the bottom plate, the front plate, the top plate, the first horizontal plate, the second horizontal plate and the back plate are jointly arranged to form a accommodating space, and the battery cell assembly is arranged in the accommodating space.

[0005] In the above solution, by providing a lower box body comprising a bottom plate and a front plate connected thereto, and an upper box body comprising a top plate, a first transverse plate, a second transverse plate, and a rear plate that can collectively enclose a storage space with the bottom plate and the front plate, the structure of the lower box body on the side of the bottom plate facing the top plate can be simplified. Furthermore, by providing at least one of the first transverse plate, the second transverse plate, and the rear plate connected to the side surface of the bottom plate, and at least one of the top plate, the first transverse plate, and the second transverse plate connected to the side surface of the front plate, the space occupied on the side of the bottom plate facing the top plate and on the side of the front plate facing the rear plate can be reduced, thereby improving the space utilization of the box assembly.

[0006] In one embodiment, the bottom plate has a first flange folded in a direction away from the top plate; the first flange forms a side surface of the bottom plate, and at least one of the first transverse plate, the second transverse plate and the rear plate is connected to the first flange.

[0007] Thus, the first flange can be used to increase the area of ​​the side surface of the bottom plate, so as to improve the connection reliability between the bottom plate and at least one of the first transverse plate, the second transverse plate and the rear plate.

[0008] In one embodiment, the front panel has a second flange folded in a direction away from the rear panel; the second flange forms a side surface of the front panel, and at least one of the top panel, the first horizontal panel and the second horizontal panel is connected to the second flange.

[0009] Thus, the second flange can be used to increase the area of ​​the side surface of the front plate, so as to improve the connection reliability between the front plate and at least one of the top plate, the first transverse plate and the second transverse plate.

[0010] In one embodiment, the first transverse plate, the second transverse plate and the rear plate are all connected to the first flange; the front plate has a second flange folded in a direction away from the rear plate; the second flange forms a side surface of the front plate, and the top plate, the first transverse plate and the second transverse plate are all connected to the second flange.

[0011] Thus, the first transverse plate, the second transverse plate, and the rear plate can all be connected to the first flange, which not only reduces the space occupied on the side of the bottom plate facing the top plate, but also improves the connection reliability between the bottom plate, the first transverse plate, the second transverse plate, and the rear plate. Simultaneously, the top plate, the first transverse plate, and the second transverse plate can all be connected to the side surface of the front plate, which not only reduces the space occupied on the side of the front plate facing the rear plate, but also improves the connection reliability between the front plate, the top plate, the first transverse plate, and the second transverse plate.

[0012] In one embodiment, the first flange and the second flange are disconnected at the connection between the bottom plate and the front plate, and a gap connecting to the accommodating space is formed; the box assembly also includes: a sealing member; the sealing member is located at the gap and is respectively connected to the first flange and the second flange to seal the gap.

[0013] Therefore, the sealing piece can be used to seal the gap caused by the flange of the lower box body, so as to improve the air tightness of the box body assembly.

[0014] In one embodiment, the box assembly further includes: a reinforcing member; the reinforcing member is located outside the accommodating space and is provided at the connection between the bottom plate and the front plate to reinforce the connection between the bottom plate and the front plate.

[0015] Therefore, the reinforcement piece can be used to reinforce the connection between the bottom plate and the front plate to improve the structural strength of the box assembly.

[0016] In one embodiment, an end portion of the reinforcing member is disposed close to the notch and connected to the blocking member.

[0017] Thus, the reinforcing piece can be connected to the first flange and the second flange through the blocking piece, so that the reinforcing piece can also reinforce the first flange and the second flange to improve the structural strength of the first flange and the second flange.

[0018] In one embodiment, the first flange and the second flange are disconnected at the connection between the bottom plate and the front plate, and a gap connecting to the accommodating space is formed; the box assembly also includes: a reinforcing piece; the reinforcing piece is located outside the accommodating space and is provided at the connection between the bottom plate and the front plate to reinforce the connection between the bottom plate and the front plate; the end of the reinforcing piece is located at the gap and is respectively connected to the first flange and the second flange to seal the gap.

[0019] Therefore, the reinforcing piece can not only be used to reinforce the connection between the bottom plate and the front plate, but also can be used to seal the gap caused by the flange of the lower box body, so as to improve the structural strength and air tightness of the box body assembly.

[0020] In one embodiment, the box assembly also includes: a sealing gasket; a portion of the sealing gasket is provided on the first flange and is connected to the first horizontal plate, the second horizontal plate and the rear plate; another portion of the sealing gasket is also provided on the second flange and is connected to the top plate, the first horizontal plate and the second horizontal plate.

[0021] Thus, the sealing gasket can be used to fill the gap between the lower box body and the upper box body to improve the air tightness of the box body assembly.

[0022] In one embodiment, the box assembly further includes: a plurality of fasteners; a portion of the fasteners is passed through the first flange and locks the first horizontal plate, the second horizontal plate and the rear plate to the first flange; another portion of the fasteners is passed through the second flange and locks the top plate, the first horizontal plate and the second horizontal plate to the second flange.

[0023] Since the fastener can use the first flange and the second flange to lock the lower box body and the upper box body together in the lateral direction, the space occupied on the side of the bottom plate facing the top plate is reduced, thereby improving the space utilization of the box assembly.

[0024] In one embodiment, the sealing gasket is located on a penetration path of the fastener and has a through hole for the fastener to penetrate.

[0025] Therefore, the sealing gasket can be positioned by using the fastener to reduce the probability of positional displacement of the sealing gasket.

[0026] In one embodiment, the fastener is located on the inner side of the sealing gasket close to the accommodating space; or, the fastener is located on the outer side of the sealing gasket away from the accommodating space.

[0027] Thus, the sealing gasket can avoid the fastener, so that the sealing gasket can remain intact, thereby improving the sealing effect of the sealing gasket.

[0028] In one embodiment, the box assembly further includes: a reinforcement member connected to the bottom plate, and the reinforcement member is provided on a surface of the bottom plate facing away from the top plate.

[0029] Therefore, the bottom plate can be reinforced by using the reinforcement piece to improve the structural strength of the box assembly.

[0030] In one embodiment, the reinforcement member is further provided with a plurality of through slots and has a plurality of reinforcement beams separated by the plurality of through slots.

[0031] Therefore, the reinforcement member can not only reinforce the bottom plate by utilizing the multiple reinforcement beams formed by the multiple through grooves, but also form multiple hollow areas by utilizing the multiple through grooves to reduce the weight of the reinforcement member.

[0032] In one embodiment, the box assembly further includes: a plurality of fixing members; the plurality of fixing members are located in the accommodating space and connected to the bottom plate, and the fixing members are connected to the battery cell assembly.

[0033] Thus, the battery cell assembly can be fixed in the accommodating space by using a plurality of fixing members, so as to improve the connection firmness between the battery cell assembly and the box assembly.

[0034] In one embodiment, a partial area of ​​the front plate is recessed toward the accommodating space to form a mounting groove, and the mounting groove is used to install functional components.

[0035] Thus, the mounting groove can occupy part of the accommodation space inwardly to reduce the protruding height of the functional component on the front panel.

[0036] In one embodiment, the bottom plate and the front plate are an integrated structure; the top plate, the first transverse plate, the second transverse plate and the rear plate are an integrated structure.

[0037] Therefore, the lower box body and the upper box body can be made in one piece, which not only improves the airtightness of the lower box body and the upper box body, but also enables the upper box body to be demolded sideways when the upper box body is made of plastic, thereby omitting the draft angle design of the upper box body and improving the space utilization of the box assembly.

[0038] In one embodiment, the width of the first flange in the direction from the top plate to the bottom plate is 20-30 mm; the width of the second flange in the direction from the rear plate to the front plate is 20-30 mm.

[0039] Therefore, the first flange and the second flange within the width range of 20-30 mm can have sufficient area to be connected to the upper box body, so as to improve the connection reliability between the lower box body and the upper box body.

[0040] On the other hand, the present application provides a battery device, which includes: a battery cell assembly and a box assembly; the box assembly includes: a metal box and a plastic box; the metal box includes: a bottom plate and a front plate connected to the bottom plate; the plastic box includes: a top plate arranged opposite to the bottom plate, a first horizontal plate and a second horizontal plate both connected to the top plate and arranged opposite to each other, and a back plate respectively connected to the top plate, the first horizontal plate and the second horizontal plate and arranged opposite to the front plate; wherein, the bottom plate, the front plate, the top plate, the first horizontal plate, the second horizontal plate and the back plate are jointly arranged to form a accommodating space, and the battery cell assembly is arranged in the accommodating space.

[0041] Thus, by providing a metal box comprising a bottom plate and a front plate connected thereto, and a plastic box comprising a top plate, a first transverse plate, a second transverse plate, and a rear plate that can collectively enclose a storage space with the bottom plate and the front plate, the structure of the metal box on the side of the bottom plate facing the top plate can be simplified, thereby reducing the space occupied on the side of the bottom plate facing the top plate, thereby improving the space utilization of the box assembly. Furthermore, by providing a metal box comprising only a bottom plate and a front plate, the structure of the metal box can be simplified, thereby reducing the production cost of the box assembly.

[0042] The present application also provides an electrical device, which includes: the above-mentioned battery device.

[0043] Thus, the battery device can utilize a box assembly with high space utilization to install a high-energy-density battery cell assembly, and can utilize the high-energy-density battery cell assembly to supply power to an electrical device, thereby extending the service life of the electrical device.

[0044] The present application also provides an energy storage device, which includes: the above-mentioned battery device.

[0045] Because the battery device can use a box assembly with high space utilization to install a high-energy-density battery cell assembly, and can use the high-energy-density battery cell assembly as an energy storage element of the energy storage device to store energy, thereby increasing the energy storage limit of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0047] Figure 1 is a schematic structural diagram of an electrical device provided in an embodiment of the present application;

[0048] Figure 2 is a schematic structural diagram of the energy storage device provided in an embodiment of the present application;

[0049] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the battery device;

[0050] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle box assembly;

[0051] Figure 5 yes Figure 3 Assembly diagram of the lower middle box and the upper box;

[0052] Figure 6 yes Figure 5 A partial enlarged schematic diagram of point A in the middle;

[0053] Figure 7 yes Figure 3 Schematic diagram of the connection structure of the middle lower box, blocking parts and some reinforcement parts;

[0054] Figure 8 yes Figure 3 Assembly diagram of the middle and lower box, upper box, sealing gasket, and multiple fasteners;

[0055] Figure 9 yes Figure 3 Schematic diagram of the connection structure of the middle lower box, the blocking piece, part of the sealing gasket and part of the fasteners;

[0056] Figure 10 yes Figure 4 A schematic diagram of the structure of the middle cabinet assembly from another perspective;

[0057] Figure 11 yes Figure 3 Schematic diagram of the connection structure between the middle and lower boxes and multiple fixing parts;

[0058] Figure 12 It is a schematic diagram of the connection structure of the lower box and functional components provided in an embodiment of the present application.

[0059] The reference numerals are as follows:

[0060] Electric device 1, energy storage device 2, battery device 10, controller 20, motor 30, installation cabinet 40, battery cell assembly 100, box assembly 200, lower box 210, bottom plate 211, first surface 2111, first flange 2112, front plate 212, third surface 2121, second flange 2122, upper box 220, top plate 221, second surface 2211, first horizontal plate 222, second horizontal plate 223, Back plate 224, sealing part 230, reinforcing part 240, sealing gasket 250, first sealing part 251, second sealing part 252, fastener 260, reinforcement part 270, through groove 271, reinforcement beam 272, cross beam 273, fixing part 280, accommodating space 201, notch 202, installation groove 203, functional component 300, high-pressure connector 310, low-pressure connector 320, explosion-proof valve 330, CSC device 340. DETAILED DESCRIPTION

[0061] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0063] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0064] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0065] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0066] In the description of the embodiments of the present application, the technical terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", "second direction", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0068] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0069] In some embodiments, the battery device housing can generally be divided into two parts: a tray and an upper cover. The upper cover generally has a frame and a flange extending outward from the edge of the frame. The flange can be located on the side of the tray facing the upper cover and can be secured to the tray via bolts extending through the flange and inserted into the tray. However, the flange design occupies some space on the side of the tray facing the upper cover, reducing the space enclosed by the tray and upper cover, which undoubtedly reduces the space utilization of the housing.

[0070] In order to solve the above technical problems, the present application provides a battery device, by setting the lower box of the box assembly to include: a bottom plate and a front plate connected to the bottom plate, and the upper box of the box assembly to include: a top plate, a first horizontal plate, a second horizontal plate and a rear plate that can be jointly arranged with the bottom plate and the front plate to form a accommodating space, so that the structure of the lower box on the side of the bottom plate facing the top plate can be simplified to reduce the space occupied on the side of the bottom plate facing the top plate, thereby improving the space utilization of the box assembly.

[0071] The battery device designed in this application can be used in an energy storage device or an electrical device. Specifically, when the battery device is used in an energy storage device, the energy storage device can be an energy storage facility such as an energy storage container or an energy storage cabinet, and the battery device can be installed as an energy storage element in the energy storage device. When the battery device is used in an electrical device, the electrical device can be an electrical device such as a mobile phone, tablet, laptop computer, electric toy, power tool, electric vehicle, vehicle, ship, spacecraft, etc., and the battery device can be installed as a power source in the electrical device.

[0072] Furthermore, an energy storage device may include: an energy storage body and a battery device as described in the context, wherein the energy storage body may be a frame structure for mounting the battery device. For example, the energy storage body may be an energy storage rack, an energy storage cabinet, or an energy storage box. Similarly, an electrical device may include: an electrical device and a battery device as described in the context, wherein the electrical device may be a frame structure for mounting the electrical device. For example, if the electrical device is a vehicle, the electrical device may be the vehicle body, while if the electrical device is a ship, the electrical device may be the hull.

[0073] It is understood that the aforementioned electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft. Vehicles may be classified by power source as fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Vehicles may be classified by drive mode as front-wheel drive, rear-wheel drive, or four-wheel drive.

[0074] See also Figures 1 to 3 , Figure 1 is a structural diagram of the electric device 1 provided in an embodiment of the present application, Figure 2 is a schematic structural diagram of the energy storage device 2 provided in an embodiment of the present application, Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the battery device 10.

[0075] When the battery device 10 is used in the electric device 1, the electric device 1 provided in the embodiment of the present application may be a vehicle, and the battery device 10 may be arranged inside the electric device 1. Figure 1As shown, the battery device 10 can be installed at the bottom, head, or tail of the electric device 1, and the battery device 10 can serve as the operating power source for the electric device 1. For example, the electric device 1 may also include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to power the motor 30 to meet the operating power requirements of the electric device 1 during startup, navigation, and driving. Of course, the battery device 10 can serve not only as the operating power source of the electric device 1, but also as the driving power source of the electric device 1, replacing or partially replacing fuel or natural gas to provide driving power for the electric device 1.

[0076] When the battery device 10 is used for the energy storage device 2, the energy storage device 2 provided in the embodiment of the present application may be specifically an energy storage cabinet, and the battery device 10 may be arranged inside the energy storage device 2. Figure 2 As shown, the energy storage device 2 may include a battery device 10 and an installation cabinet 40. Multiple battery devices 10 may be provided, and multiple battery devices 10 may be installed within the installation cabinet 40, serving as energy storage elements to store electrical energy for the energy storage device 2. In addition to the installation cabinet 40, the energy storage device 2 may also include other functional components, such as conductive components, heat dissipation components, and detection components, which are not specifically listed in this embodiment.

[0077] The battery device 10 can be used to supply power to the power-consuming device 1 or store power for the energy storage device 2, and the battery device 10 may include: a battery cell assembly 100 and a box assembly 200. Figure 3 As shown, the battery cell assembly 100 can be disposed within the housing assembly 200, and the battery cell assembly 100 can be used to power the power consumption device 1 or store power for the energy storage device 2. The housing assembly 200 can accommodate the battery cell assembly 100 and can be used to connect to the power consumption body of the power consumption device 1 or the energy storage body of the energy storage device 2 to secure the battery device 10 to the power consumption device 1 or the energy storage device 2. Taking the power consumption device 1 as an example, when the power consumption device 1 is a vehicle, the housing assembly 200 can be connected to the body of the power consumption device 1, so that the entire battery device 10 can be secured to the body of the power consumption device 1.

[0078] The battery cell assembly 100 may include at least one battery cell, and the battery cell may be used to store or release electrical energy to power the electrical device 1 when needed. The battery cell may be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after discharge and continue to be used. Battery cells may include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0079] Furthermore, when there are multiple battery cells, the multiple battery cells can be electrically connected by at least one of series connection, parallel connection, and hybrid connection via a busbar assembly, and can be bundled together to be placed as a whole within the box assembly 200. Of course, the multiple battery cells can also be divided into multiple groups according to a preset number for bundling, and are not limited to being bundled into one group.

[0080] In some embodiments, the connection method of multiple battery cells is not limited to bundling, and multiple battery cells can also be connected using other methods. In some embodiments, multiple battery cells are not limited to being bundled into one body and placed as a whole in the box assembly 200, and multiple battery cells can also be placed independently in the box assembly 200.

[0081] See also Figures 4 and 5 , Figure 4 yes Figure 3 A schematic structural diagram of the middle box assembly 200, Figure 5 yes Figure 3 Schematic diagram of the assembly of the middle and lower box body 210 and the upper box body 220.

[0082] The box assembly 200 can accommodate the battery cell assembly 100, and the box assembly 200 can include: a lower box 210 and an upper box 220. Figures 4 and 5 As shown, the lower case 210 may include a bottom plate 211 and a front plate 212 connected to the bottom plate 211. The upper case 220 may include a top plate 221 disposed opposite the bottom plate 211, a first transverse plate 222 and a second transverse plate 223 both connected to and opposite the top plate 221, and a rear plate 224 connected to the top plate 221, the first transverse plate 222, and the second transverse plate 223, respectively, and disposed opposite the front plate 212. At least one of the first transverse plate 222, the second transverse plate 223, and the rear plate 224 may be connected to a side surface of the bottom plate 211. At least one of the top plate 221, the first transverse plate 222, and the second transverse plate 223 may be connected to a side surface of the front plate 212. The bottom plate 211, the front plate 212, the top plate 221, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 collectively enclose a storage space 201.

[0083] The lower case 210 can be used to support and secure the battery cell assembly 100. The lower case 210 can be made of metal, which provides it with high structural strength and enhances the connection stability between the battery cell assembly 100 and the lower case 210. Of course, the material of the lower case 210 can also be selected based on design requirements. This embodiment will only illustrate the lower case 210 as being made of metal. Furthermore, when the lower case 210 is made of metal, it can also be referred to as a "metal case."

[0084] Furthermore, the lower box body 210 may include: a bottom plate 211 and a front plate 212. The bottom plate 211 may have a first surface 2111 for supporting and fixing the battery cell assembly 100, and the first surface 2111 may be perpendicular to the thickness direction of the bottom plate 211, that is, the height direction H of the box assembly 200. The front plate 212 may be arranged on the first surface 2111 as a side plate of the lower box body 210, and may be connected to the edge of the first surface 2111, so that the lower box body 210 may be a single-sided side plate structure. For example, the first surface 2111 may be rectangular, and the front plate 212 may be connected to a short side of the first surface 2111, so that the lower box body 210 may be arranged in an "L" shape in appearance.

[0085] In some embodiments, when the lower housing 210 is made of metal, the bottom plate 211 can have good thermal conductivity, and thus the bottom plate 211 can also constitute part of the heat dissipation system of the battery device 10. For example, the bottom plate 211 can constitute at least part of the cold plate of the battery device 10 to dissipate heat from the battery cell assembly 100 placed on the first surface 2111, thereby improving the heat dissipation performance of the battery device 10.

[0086] The upper case 220 can be connected to the lower case 210 and can be enclosed together with the lower case 210 to form a storage space 201 to accommodate the battery cell assembly 100. The material of the upper case 220 can be plastic, so that the upper case 220 can have a relatively light weight, thereby achieving a lightweight design of the case assembly 200. Of course, the material of the upper case 220 can also be selected according to design requirements. This embodiment is only described as the upper case 220 being plastic. At the same time, when the material of the upper case 220 is plastic, the upper case 220 can also be referred to as a "plastic case."

[0087] Furthermore, the upper case 220 may include a top plate 221, a first transverse plate 222, a second transverse plate 223, and a rear plate 224. The top plate 221 may be disposed opposite the bottom plate 211 in the height direction H and may have a second surface 2211 facing the first surface 2111. The first transverse plate 222, the second transverse plate 223, and the rear plate 224 may each serve as side plates of the upper case 220 and be disposed on the second surface 2211. The first transverse plate 222, the second transverse plate 223, and the rear plate 224 may also be connected to the edges of the second surface 2211, allowing the upper case 220 to have a three-sided side plate structure. Furthermore, the first transverse plate 222 and the second transverse plate 223 may be disposed opposite each other in the width direction W of the case assembly 200 and may be connected to opposite sides of the rear plate 224 in the width direction W. Furthermore, the rear plate 224 and the front plate 212 may be disposed opposite each other in the length direction L of the case assembly 200.

[0088] For example, the second surface 2211 can also be rectangular, and the long and short sides of the second surface 2211 can be arranged corresponding to the long and short sides of the first surface 2111. The first horizontal plate 222 and the second horizontal plate 223 can be connected to the two long sides of the second surface 2211, and can be arranged corresponding to the two long sides of the first surface 2111. The rear plate 224 can be connected to the short side of the second surface 2211 away from the front plate 212, and can be arranged corresponding to the short side of the first surface 2111 away from the front plate 212. In this way, the lower case 210 and the upper case 220 can complement each other and can be assembled together to form a rectangular parallelepiped structure.

[0089] It can be understood that the aforementioned scheme of the first surface 2111 and the second surface 2211 being rectangular is only an exemplary description. The specific shapes of the first surface 2111 and the second surface 2211 can be selected according to the appearance requirements of the box assembly 200. The following only takes the box assembly 200 as a rectangular structure as an example.

[0090] In the above solution, by configuring the lower box 210 as a single-sided side panel structure and the upper box 220 as a three-sided side panel structure, not only can the lower box 210 and the upper box 220 complement each other to jointly enclose and form a closed accommodating space 201, but the structure of the lower box 210 on the first surface 2111 can also be simplified. When the lower box 210 is made of metal and the upper box 220 is made of plastic, simplifying the structure of the lower box 210 can also reduce the production cost of the box assembly 200.

[0091] like Figures 4 and 5 As shown, at least one of the first transverse plate 222, the second transverse plate 223 and the rear plate 224 may be connected to the side surface of the bottom plate 211. At least one of the top plate 221, the first transverse plate 222 and the second transverse plate 223 may be connected to the side surface of the front plate 212.

[0092] Specifically, the edges of the first transverse plate 222, the second transverse plate 223, and the rear plate 224 away from the top plate 221 can be used to connect to the side surface of the bottom plate 211. The side surface of the bottom plate 211 can be parallel to the height direction H and can include two side surfaces disposed opposite each other in the width direction W and a side surface disposed away from the front plate 212 in the length direction L. At the same time, the two side surfaces of the bottom plate 211 disposed opposite each other in the width direction W can be connected to the first transverse plate 222 and the second transverse plate 223, respectively, while the side surface disposed away from the front plate 212 in the length direction L can be connected to the rear plate 224, so that the first transverse plate 222, the second transverse plate 223, and the rear plate 224 can all be connected to the side surface of the bottom plate 211.

[0093] In some embodiments, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 are not limited to being connected to the side surface of the bottom plate 211. For example, the first transverse plate 222 and the second transverse plate 223 can be connected to the side surface of the bottom plate 211, while the rear plate 224 can be connected to the first surface 2111 of the bottom plate 211 by welding, snapping, or plugging. Alternatively, either the first transverse plate 222 or the second transverse plate 223 can be connected to the first surface 2111 of the bottom plate 211, while the other and the rear plate 224 can be connected to the side surface of the bottom plate 211. Alternatively, both the first transverse plate 222 and the second transverse plate 223 can be connected to the first surface 2111 of the bottom plate 211, while the rear plate 224 can be connected to the side surface of the bottom plate 211.

[0094] The edges of the top plate 221, the first transverse plate 222, and the second transverse plate 223 that are away from the rear plate 224 can be used to connect to the side surfaces of the front plate 212. The side surfaces of the front plate 212 can be parallel to the length direction L and can include two side surfaces that are opposite each other in the width direction W, and a side surface that is located away from the bottom plate 211 in the height direction H. At the same time, the two side surfaces of the front plate 212 that are opposite each other in the width direction W can be connected to the first transverse plate 222 and the second transverse plate 223, respectively, while the side surface that is located away from the bottom plate 211 in the height direction H can be connected to the top plate 221, so that the top plate 221, the first transverse plate 222, and the second transverse plate 223 can all be connected to the side surfaces of the front plate 212.

[0095] In some embodiments, the top plate 221, the first transverse plate 222, and the second transverse plate 223 are not limited to being all connected to the side surfaces of the front plate 212. For example, the first transverse plate 222 and the second transverse plate 223 can be connected to the side surfaces of the front plate 212, while the top plate 221 can be connected to the third surface 2121 of the front plate 212 by welding, snapping, or plugging. Alternatively, either the first transverse plate 222 or the second transverse plate 223 can be connected to the third surface 2121 of the front plate 212, while the other and the top plate 221 can be connected to the side surfaces of the front plate 212. Alternatively, both the first transverse plate 222 and the second transverse plate 223 can be connected to the third surface 2121 of the front plate 212, while the top plate 221 can be connected to the side surface of the front plate 212. The third surface 2121 is the side of the front plate 212 facing the rear plate 224.

[0096] In some embodiments, the side surface of the bottom plate 211 is not limited to being parallel to the height direction H. The side surface of the bottom plate 211 can also be tilted relative to the height direction H, and the tilt angle of the side surface of the bottom plate 211 can be adjusted according to design requirements. Similarly, the side surface of the front plate 212 is not limited to being parallel to the length direction L. The side surface of the front plate 212 can also be tilted relative to the length direction L, and the tilt angle of the side surface of the front plate 212 can also be adjusted according to the design requirements of the cabinet assembly 200. The following description will only take the example of the side surface of the bottom plate 211 being parallel to the height direction H and the side surface of the front plate 212 being parallel to the length direction L.

[0097] Furthermore, when the first transverse plate 222, the second transverse plate 223, and the rear plate 224 are all connected to the bottom plate 211, and the top plate 221, the first transverse plate 222, and the second transverse plate 223 are all connected to the front plate 212, the bottom plate 211, the front plate 212, the top plate 221, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 can be collectively enclosed to form a closed accommodation space 201 to accommodate the battery cell assembly 100. The first transverse plate 222, the second transverse plate 223, and the rear plate 224 can be connected to the bottom plate 211 by one or more of bonding, welding, screwing, and clamping, while the top plate 221, the first transverse plate 222, and the second transverse plate 223 can be connected to the front plate 212 by the same method.

[0098] In the above embodiment, by connecting at least one of the first transverse plate 222, the second transverse plate 223, and the rear plate 224 to the side surface of the bottom plate 211, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 can be prevented from simultaneously occupying space on the first surface 2111. Similarly, by connecting at least one of the top plate 221, the first transverse plate 222, and the second transverse plate 223 to the side surface of the front plate 212, the top plate 221, the first transverse plate 222, and the second transverse plate 223 can be prevented from simultaneously occupying space on the third surface 2121. This not only reduces the space occupied by the bottom plate 211 on the first surface 2111, but also reduces the space occupied by the front plate 212 on the third surface 2121, thereby improving the space utilization of the cabinet assembly 200.

[0099] Through the above arrangement, the box assembly 200 provided in the embodiment of the present application can expand the volume of the accommodating space 201 while maintaining or slightly changing the overall size, thereby improving the space utilization of the box assembly 200. Furthermore, when the lower box 210 is made of metal and the upper box 220 is made of plastic, the box assembly 200 provided in the embodiment of the present application can also have the advantage of low production cost.

[0100] In some embodiments, the edges of the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224 away from the top plate 221 can be connected to the side surface of the bottom plate 211, and the edges of the top plate 221, the first horizontal plate 222 and the second horizontal plate 223 away from the rear plate 224 can be connected to the side surface of the front plate 212, which can maximize the space utilization of the box assembly 200.

[0101] like Figures 4 and 5 As shown, the bottom plate 211 and the front plate 212 may be an integral structure, and the top plate 221 , the first transverse plate 222 , the second transverse plate 223 and the rear plate 224 may also be an integral structure.

[0102] When the lower box body 210 is made of metal, the bottom plate 211 and the front plate 212 can be integrally formed by a sheet metal process. For example, a whole metal plate can be sheet metaled so that a portion of the metal plate can be bent to form the front plate 212, and the remaining area of ​​the metal plate can form the bottom plate 211.

[0103] In some embodiments, the lower box 210 may be made of materials other than metal, and may be integrally manufactured using a process corresponding to the material. For example, the lower box 210 may be made of plastic, and may be integrally manufactured using an in-mold injection molding process.

[0104] When the upper case 220 is made of plastic, the top plate 221, first transverse plate 222, second transverse plate 223, and rear plate 224 can be integrally formed using an in-mold injection molding process. Furthermore, because the upper case 220 comprises three side panels, the upper case 220 can be demolded laterally, eliminating the need for a draft angle required for demolding the upper case 220. This increases the available space for the upper case 220 and improves the space utilization of the case assembly 200.

[0105] In some embodiments, the material of the upper box body 220 can also be other materials besides plastic, and the upper box body 220 can also be made in one piece using a process corresponding to the material. For example, the material of the upper box body 220 can also be metal, and the upper box body 220 can be made in one piece using a stamping process.

[0106] In the above scheme, by setting the bottom plate 211 and the front plate 212 as an integral structure, and setting the top plate 221, the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224 as an integral structure, not only the airtightness of the lower box body 210 and the upper box body 220 can be improved, but also the lateral demolding of the upper box body 220 can be achieved when the material of the upper box body 220 is plastic, so as to omit the draft angle design of the upper box body 220, thereby improving the space utilization of the box assembly 200.

[0107] Please combine Figure 5See Figures 6 and 7 , Figure 6 yes Figure 5 A partial enlarged schematic diagram of point A in the middle, Figure 7 yes Figure 3 Schematic diagram of the connection structure of the middle lower box body 210, the blocking member 230 and part of the reinforcing member 240.

[0108] like Figures 5 and 6 As shown, in order to facilitate the connection between the bottom plate 211 and the upper box body 220, the bottom plate 211 may have a first flange 2112 that is folded in a direction away from the top plate 221. The first flange 2112 may be formed on the side surface of the bottom plate 211, and at least one of the first transverse plate 222, the second transverse plate 223, and the rear plate 224 is connected to the first flange 2112.

[0109] Specifically, the first flange 2112 can be formed by folding the edge of the bottom plate 211 corresponding to the first transverse plate 222, the second transverse plate 223, and the rear plate 224 in a direction away from the top plate 221, and the portion of the first surface 2111 corresponding to the edge of the bottom plate 211 can be folded to form the side surface of the bottom plate 211 to connect with the first transverse plate 222, the second transverse plate 223, and the rear plate 224. In other words, the first flange 2112 can fold a portion of the first surface 2111 to form the side surface of the bottom plate 211 to connect with the first transverse plate 222, the second transverse plate 223, and the rear plate 224.

[0110] Furthermore, the first flange 2112 may include two flanges disposed opposite each other in the width direction W, and one flange disposed away from the front plate 212 in the length direction L. Simultaneously, the two flanges of the first flange 2112 disposed opposite each other in the width direction W may be connected to the first transverse plate 222 and the second transverse plate 223, respectively, while the flange disposed away from the front plate 212 in the length direction L may be connected to the rear plate 224. The first flange 2112 may be formed by folding over the bottom plate 211 using a sheet metal process to enhance the integrity of the lower case 210. Furthermore, the folding angle of the first flange 2112 may be 90°, so that the side surface formed by the first flange 2112 remains parallel to the height direction H.

[0111] In some embodiments, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 are not limited to being all connected to the first flange 2112. For example, the first flange 2112 may include only one flange away from the front plate 212 in the length direction L to connect to the rear plate 224, while the first transverse plate 222 and the second transverse plate 223 may be connected to the first surface 2111, or respectively connected to two opposite side surfaces of the bottom plate 211 in the width direction W.

[0112] For another example, the first flange 2112 may include only two flanges arranged opposite to each other in the width direction W, so as to be connected to the first horizontal plate 222 and the second horizontal plate 223 respectively, and the rear plate 224 may be connected to the first surface 2111, or to the side of the bottom plate 211 away from the front plate 212 in the length direction L.

[0113] For another example, only one of the two flanges of the first flange 2112 that are opposite to each other in the width direction W may be retained, and the flange of the first flange 2112 that is farther away from the front plate 212 in the length direction L may also be retained. In this case, the back plate 224 may be connected to the flange of the first flange 2112 that is retained in the length direction L, and one of the first transverse plate 222 and the second transverse plate 223 may be connected to the flange of the first flange 2112 that is retained in the width direction W, while the other may be connected to the first surface 2111 or to the side of the bottom plate 211 that is opposite to the retained flange in the width direction W.

[0114] In the above scheme, by setting the bottom plate 211 to have a first flange 2112 that is folded in the direction away from the top plate 221, and the first flange 2112 also forms a side surface of the bottom plate 211, the thickness of the bottom plate 211 can remain unchanged, and the first flange 2112 can be used to increase the area of ​​the side surface of the bottom plate 211, thereby improving the connection reliability between the bottom plate 211 and at least one of the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224.

[0115] like Figures 5 and 6 As shown, in order to facilitate the connection between the front plate 212 and the upper box body 220, the front plate 212 may have a second flange 2122 that is folded in a direction away from the rear plate 224. The second flange 2122 may be formed on the side surface of the front plate 212, and the top plate 221, the first transverse plate 222, and the second transverse plate 223 are all connected to the second flange 2122.

[0116] The second flange 2122 can be formed by folding the edge of the front panel 212 corresponding to the top panel 221, the first transverse panel 222, and the second transverse panel 223 in a direction away from the rear panel 224, and the portion of the third surface 2121 corresponding to the edge of the front panel 212 can be folded to form a side surface of the front panel 212 to connect with the top panel 221, the first transverse panel 222, and the second transverse panel 223. In other words, the second flange 2122 can fold a portion of the third surface 2121 to form a side surface of the front panel 212 to connect with the top panel 221, the first transverse panel 222, and the second transverse panel 223.

[0117] Furthermore, the second flange 2122 may include two flanges arranged opposite to each other in the width direction W, and one flange arranged away from the bottom plate 211 in the height direction H. Simultaneously, the two flanges of the second flange 2122 arranged opposite to each other in the width direction W may be connected to the first transverse plate 222 and the second transverse plate 223, respectively, while the flange arranged away from the bottom plate 211 in the height direction H may be connected to the top plate 221. The second flange 2122 may also be formed by folding on the front plate 212 using a sheet metal process to improve the integrity of the lower box body 210. Furthermore, the folding angle of the second flange 2122 may be 90°, so that the side surface formed by the second flange 2122 can remain parallel to the length direction L.

[0118] In some embodiments, the top plate 221, the first transverse plate 222, and the second transverse plate 223 are not limited to being all connected to the second flange 2122. For example, the second flange 2122 may include only one flange away from the bottom plate 211 in the height direction H to be connected to the top plate 221, while the first transverse plate 222 and the second transverse plate 223 may be connected to the third surface 2121, or respectively connected to two side surfaces of the front plate 212 that are opposite to each other in the width direction W.

[0119] For another example, the second flange 2122 may include only two flanges arranged opposite to each other in the width direction W, so as to be connected to the first horizontal plate 222 and the second horizontal plate 223 respectively, and the top plate 221 may be connected to the third surface 2121, or to the side of the front plate 212 away from the bottom plate 211 in the height direction H.

[0120] For another example, only one of the two flanges of the second flange 2122 that are opposite to each other in the width direction W can be retained, and the flange of the second flange 2122 that is farther away from the bottom plate 211 in the height direction H can also be retained. In this case, the top plate 221 can be connected to the flange of the second flange 2122 that is retained in the height direction H, one of the first transverse plate 222 and the second transverse plate 223 can be connected to the flange of the second flange 2122 that is retained in the width direction W, and the other can be connected to the third surface 2121 or to the side surface of the front plate 212 that is opposite to the retained flange in the width direction W.

[0121] In the above scheme, by setting the front panel 212 to have a second flange 2122 that is folded in the direction away from the rear panel 224, and the second flange 2122 also forms the side surface of the front panel 212, the thickness of the front panel 212 can remain unchanged, and the second flange 2122 can be used to increase the area of ​​the side surface of the front panel 212, thereby improving the connection reliability between the front panel 212 and at least one of the top panel 221, the first horizontal panel 222 and the second horizontal panel 223.

[0122] In some embodiments, the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224 can all be connected to the first flange 2112, and the top plate 221, the first horizontal plate 222 and the second horizontal plate 223 can all be connected to the second flange 2122, which can maximize the connection reliability between the lower box 210 and the upper box 220.

[0123] like Figures 5 and 6 As shown, the width of the first flange 2112 in the direction from the top plate 221 to the bottom plate 211 can be 20-30 mm. The width of the second flange 2122 in the direction from the rear plate 224 to the front plate 212 can also be 20-30 mm.

[0124] The width of the first flange 2112 can be 20 mm, 23 mm, 25 mm, 28 mm, or 30 mm, and the width of the second flange 2122 can also be 20 mm, 23 mm, 25 mm, 28 mm, or 30 mm, and the widths of the first flange 2112 and the second flange 2122 can be the same. Meanwhile, the edges of the top plate 221, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 can also be reserved with a width of 20-30 mm, and the reserved widths of the edges of the top plate 221, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 can also match the widths of the first flange 2112 and the second transverse plate 2122.

[0125] In some embodiments, the widths of the first flange 2112 and the second flange 2122 may also be different. It is only necessary that the width of the first flange 2112 and the width of the second flange 2122 can be 20-30 mm. The specific width values ​​of the two can be selected according to design requirements. This embodiment will not be listed one by one here.

[0126] In the above scheme, by controlling the width of the first flange 2112 and the second flange 2122 between 20-30 mm, it can be ensured that the first flange 2112 and the second flange 2122 form a sufficiently large side surface to connect with the top plate 221, the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224, thereby improving the connection reliability of the lower box body 210 and the upper box body 220.

[0127] like Figures 6 and 7 As shown, the first flange 2112 and the second flange 2122 are disconnected at the connection between the bottom plate 211 and the front plate 212, forming a gap 202 that communicates with the accommodating space 201. The box assembly 200 may also include a blocking member 230, which may be located at the gap 202 and connected to the first flange 2112 and the second flange 2122, respectively, to block the gap 202.

[0128] When the lower case 210 is integrally formed using a sheet metal process, the first flange 2112 and the second flange 2122 can only be formed by folding separately due to the limitations of the sheet metal process, and cannot be formed continuously at the connection between the bottom plate 211 and the front plate 212. Therefore, the first flange 2112 and the second flange 2122 are disconnected at the connection between the bottom plate 211 and the front plate 212, forming a gap 202 at the connection between the bottom plate 211 and the front plate 212, which connects to the accommodating space 201. This undoubtedly affects the airtightness of the lower case 210.

[0129] To seal the gap 202, the housing assembly 200 may further include a sealing member 230. The shape of the sealing member 230 may be adapted to that of the gap 202, allowing the sealing member 230 to better fill the gap 202 and thereby facilitate sealing the gap 202. The sealing member 230 is made of the same material as the lower housing 210 and may be welded to the first flange 2112 and the second flange 2122, respectively, to secure the sealing member 230 in the gap 202.

[0130] In some embodiments, the material of the blocking member 230 may also be non-metallic materials such as plastic, and the blocking member 230 may also be connected to the first flange 2112 and the second flange 2122 by non-welding methods such as bonding. It is only necessary that the blocking member 230 can be set at the notch 202 and be able to block the notch 202. This embodiment will not be listed one by one here.

[0131] In the above scheme, a sealing member 230 is provided at the notch 202, and the sealing member 230 can also be connected to the first flange 2112 and the second flange 2122 respectively, so that the sealing member 230 can not only seal the notch 202, but also connect the first flange 2112 and the second flange 2122 together, so as to improve the airtightness of the box assembly 200 while enhancing the structural strength of the first flange 2112 and the second flange 2122.

[0132] like Figures 6 and 7 As shown, in order to enhance the connection strength between the bottom plate 211 and the front plate 212, the box assembly 200 may further include a reinforcing member 240. The reinforcing member 240 may be disposed outside the accommodating space 201 and may be disposed at the connection between the bottom plate 211 and the front plate 212 to reinforce the connection between the bottom plate 211 and the front plate 212.

[0133] The reinforcing piece 240 may be disposed at the corner where the bottom plate 211 and the front plate 212 are connected, and may extend in the width direction W to cover the connecting edge of the bottom plate 211 and the front plate 212 extending in the width direction W. Part of the reinforcing piece 240 may be connected to the side of the bottom plate 211 facing away from the receiving space 201, while another part of the reinforcing piece 240 may be connected to the side of the front plate 212 facing away from the receiving space 201, so that the reinforcing piece 240 can reinforce the connection between the bottom plate 211 and the front plate 212.

[0134] Furthermore, the reinforcing member 240 may be made of metal, so that the reinforcing member 240 has sufficient structural strength to reinforce the connection between the bottom plate 211 and the front plate 212. The reinforcing member 240 may be connected to the bottom plate 211 and / or the front plate 212 by one or more connection methods such as welding, bonding, screwing, and clamping.

[0135] It is understood that the reinforcing member 240 can be made of a variety of materials. For example, considering the lightweight design requirements, the reinforcing member 240 can also be made of hard plastic. The reinforcing member 240 only needs to reinforce the connection between the bottom plate 211 and the front plate 212. This embodiment will not be listed here.

[0136] In the above solution, by providing a reinforcing piece 240 at the connection between the bottom plate 211 and the front plate 212 , the reinforcing piece 240 can be used to reinforce the connection between the bottom plate 211 and the front plate 212 to improve the structural strength of the lower box body 210 .

[0137] like Figures 6 and 7 As shown, the end of the reinforcing piece 240 may also be disposed close to the notch 202 and may be connected to the blocking piece 230 .

[0138] The ends of the reinforcing member 240 can extend in the width direction W, so that the reinforcing member 240 not only covers the connecting edge of the bottom plate 211 and the front plate 212 in the width direction W, but can also be positioned near the notch 202 to connect with the blocking member 230. The ends of the reinforcing member 240 can be welded to the blocking member 230 to improve the connection strength between the reinforcing member 240 and the blocking member 230. Of course, the connection method between the reinforcing member 240 and the blocking member 230 is not limited to welding. The two can also be connected by methods such as bonding or screwing. The specific connection method can be selected based on design requirements.

[0139] In the above scheme, by setting the end of the reinforcing piece 240 to be connected to the sealing piece 230, the reinforcing piece 240 can be connected to the first flange 2112 and the second flange 2122 using the sealing piece 230 to reinforce the first flange 2112 and the second flange 2122, thereby improving the structural strength of the first flange 2112 and the second flange 2122.

[0140] In some embodiments, the blocking member 230 may be omitted, and the ends of the reinforcing member 240 may be located at the notch 202 and connected to the first flange 2112 and the second flange 2122 , respectively, to block the notch 202 .

[0141] The ends of the reinforcing member 240 can extend in the width direction W to the notch 202 and can replace the sealing member 230 to connect to the first flange 2112 and the second flange 2122, respectively, to seal the notch 202. The shape of the end of the reinforcing member 240 can match the shape of the notch 202 to facilitate the reinforcing member 240 in sealing the notch 202. Furthermore, the reinforcing member 240 can be connected to the first and second flanges 2112, 2122 by welding to improve the connection strength between the reinforcing member 240 and the first and second flanges 2112, 2122. Of course, there are many other ways to connect the reinforcing member 240 to the first and second flanges 2112, 2122, which are not listed here in this embodiment.

[0142] In the above scheme, by setting the end of the reinforcing piece 240 at the notch 202 and being connected to the first flange 2112 and the second flange 2122 respectively, the reinforcing piece 240 can not only reinforce the bottom plate 211, the front plate 212, the first flange 2112 and the second flange 2122, but also replace the sealing piece 230 to seal the notch 202, so as to improve the structural strength and air tightness of the box assembly 200.

[0143] See also Figures 8 and 9 , Figure 8 yes Figure 3 Schematic diagram of the assembly of the middle and lower box body 210, the upper box body 220, the sealing gasket 250 and the plurality of fasteners 260, Figure 9 yes Figure 3 Schematic diagram of the connection structure of the middle lower box body 210, the blocking member 230, part of the sealing gasket 250 and part of the fastener 260.

[0144] like Figures 8 and 9As shown, the box assembly 200 may further include a sealing gasket 250. A portion of the sealing gasket 250 may be disposed on the first flange 2112 and connected to the first transverse plate 222, the second transverse plate 223, and the rear plate 224. Another portion of the sealing gasket 250 may be disposed on the second flange 2122 and connected to the top plate 221, the first transverse plate 222, and the second transverse plate 223.

[0145] To improve the airtightness of the box assembly 200, the box assembly 200 may be provided with a sealing gasket 250 at the connection interface between the lower box 210 and the upper box 220, that is, on the first flange 2112 and the second flange 2122. The sealing gasket 250 is used to block the gap at the connection interface between the lower box 210 and the upper box 220, thereby improving the airtightness of the box assembly 200. The sealing gasket 250 may be made of an elastic material such as silicone, rubber, or soft plastic.

[0146] Furthermore, the sealing gasket 250 may include a first sealing portion 251 and a second sealing portion 252. The first sealing portion 251 is disposed on the first flange 2112 and extends along the first flange 2112. The second sealing portion 252 is disposed on the second flange 2122 and extends along the second flange 2122. The first sealing portion 251 and the second sealing portion 252 are integrally formed and may be connected on the sealing member 230, such that the first sealing portion 251 and the second sealing portion 252 remain continuous and completely cover the first flange 2112 and the second flange 2122.

[0147] Furthermore, the first sealing portion 251 can also be connected to the first transverse plate 222, the second transverse plate 223, and the rear plate 224, so that the first sealing portion 251 can block the gaps between the first flange 2112 and the first transverse plate 222, the second transverse plate 223, and the rear plate 224. The second sealing portion 252 can also be connected to the top plate 221, the first transverse plate 222, and the second transverse plate 223, so that the second sealing portion 252 can block the gaps between the second flange 2122 and the top plate 221, the first transverse plate 222, and the second transverse plate 223.

[0148] In the above solution, by providing a continuous sealing gasket 250 on the first flange 2112 and the second flange 2122 , the sealing gasket 250 can seal the gap between the lower box body 210 and the upper box body 220 on the connection interface to improve the air tightness of the box assembly 200 .

[0149] like Figures 8 and 9As shown, the box assembly 200 may further include a plurality of fasteners 260. Some of the fasteners 260 may be disposed on the first flange 2112 and may be used to fasten the first transverse plate 222, the second transverse plate 223, and the rear plate 224 to the first flange 2112. Other fasteners 260 may be disposed on the second flange 2122 and may be used to fasten the top plate 221, the first transverse plate 222, and the second transverse plate 223 to the second flange 2122.

[0150] The fasteners 260 may be bolts, and some of the fasteners 260 may be intermittently inserted into the first flange 2112 and engaged with a plurality of nuts pre-installed on the first flange 2112 to be fixed to the first flange 2112. Furthermore, corresponding positions of the first transverse plate 222, the second transverse plate 223, and the rear plate 224 may be provided with screw holes for the fasteners 260 to pass through, so that the first transverse plate 222, the second transverse plate 223, and the rear plate 224 can be locked to the first flange 2112 via the fasteners 260.

[0151] Furthermore, another portion of fasteners 260 may be intermittently disposed on the second flange 2122 and may cooperate with a plurality of pre-installed nuts on the second flange 2122 to be fixed to the second flange 2122. At the same time, corresponding positions of the top plate 221, the first transverse plate 222, and the second transverse plate 223 may be provided with screw holes for the fasteners 260 to pass through, so that the top plate 221, the first transverse plate 222, and the second transverse plate 223 can be locked to the second flange 2122 via the fasteners 260.

[0152] In some embodiments, the fastener 260 may be a bolt, a screw, a rivet, or other connecting structure. Furthermore, the nut on the first flange 2112 may be omitted, and the fastener 260 on the first flange 2112 may be fixed to the first flange 2112 via a reinforcement 270 of the box assembly 200. The reinforcement 270 will be described later and will not be further elaborated here.

[0153] In the above scheme, by passing a plurality of fasteners 260 through the first flange 2112 and the second flange 2122, the plurality of fasteners 260 can utilize the first flange 2112 and the second flange 2122 to laterally lock the lower box 210 and the upper box 220 together, so as to reduce the occupied space on the first surface 2111, thereby improving the space utilization of the box assembly 200.

[0154] like Figures 8 and 9 As shown, the sealing gasket 250 may be located on a penetration path of the fastener 260 and have a through hole for the fastener 260 to penetrate.

[0155] Since the sealing gasket 250 is also arranged on the first flange 2112 and the second flange 2122, the sealing gasket 250 will also be located on the penetration path of the fastener 260, and can have a through hole for the fastener 260 to penetrate, so that the fastener 260 can be penetrated into the sealing gasket 250 to fix the sealing gasket 250 on the first flange 2112 and the second flange 2122.

[0156] In the above solution, by arranging the fastener 260 to pass through the sealing gasket 250 , the fastener 260 can also limit the sealing gasket 250 to reduce the probability of the position of the sealing gasket 250 being offset.

[0157] In some embodiments, the fastener 260 may also be located on the inner side of the sealing gasket 250 close to the accommodating space 201 . Alternatively, the fastener 260 may also be located on the outer side of the sealing gasket 250 away from the accommodating space 201 .

[0158] When the widths of the first flange 2112 and the second flange 2122 are sufficient, the sealing gasket 250 can be entirely arranged on the side of the fastener 260 close to the receiving space 201, that is, the fastener 260 is located on the outside of the sealing gasket 250 away from the receiving space 201. Alternatively, the sealing gasket 250 can be entirely arranged on the side of the fastener 260 away from the receiving space 201, that is, the fastener 260 is located on the inside of the sealing gasket 250 close to the receiving space 201.

[0159] In some embodiments, when the width of the first flange 2112 and the second flange 2122 is insufficient to be arranged as a whole on the side of the fastener 260 close to or away from the accommodating space 201, the partial area of ​​the sealing gasket 250 corresponding to the fastener 260 can be partially recessed in the direction close to or away from the accommodating space 201 to avoid the fastener 260, so that the fastener 260 can be set on the inside or outside of the sealing gasket 250.

[0160] In the above solution, the fastener 260 can be located on the inner side of the sealing gasket 250 close to the accommodating space 201, or on the outer side of the sealing gasket 250 away from the accommodating space 201, so that the sealing gasket 250 can avoid the fastener 260 to maintain the integrity of the sealing gasket 250, thereby improving the sealing effect of the sealing gasket 250.

[0161] See also Figures 10 to 12 , Figure 10 yes Figure 4 A structural diagram of the middle box assembly 200 from another perspective, Figure 11 yes Figure 3 Schematic diagram of the connection structure between the middle and lower box 210 and multiple fixing members 280, Figure 12 It is a schematic diagram of the connection structure of the lower box 210 and the functional component 300 provided in an embodiment of the present application.

[0162] like Figure 10 As shown, the box assembly 200 may further include a reinforcement member 270 . The reinforcement member 270 is connected to the bottom plate 211 and may be located on a side of the bottom plate 211 facing away from the top plate 221 .

[0163] The first flange 2112 can define an installation space on the side of the bottom plate 211 facing away from the top plate 221. The reinforcement member 270 can be disposed within the installation space and connected to the bottom plate 211. The reinforcement member 270 can be made of metal and have a thickness greater than that of the bottom plate 211. The reinforcement member 270 can cover at least a portion of the side of the bottom plate 211 facing away from the top plate 221, thereby reinforcing the bottom plate 211.

[0164] Furthermore, the reinforcement member 270 can be connected to the side of the bottom plate 211 facing away from the top plate 221 by means of bolts or other structures, so as to be locked together with the bottom plate 211. At the same time, the reinforcement member 270 can also be arranged flush with the first flange 2112 in the direction in which the bottom plate 211 faces away from the top plate 221, so that the bottom surface of the box assembly 200 can remain flat, thereby facilitating the connection of the box assembly 200 to an external structure.

[0165] In some embodiments, when the nut on the first flange 2112 is omitted, the fastener 260 on the first flange 2112 can also be inserted into the reinforcement 270 to be fixed to the first flange 2112 through the reinforcement 270 .

[0166] In the above solution, by arranging a reinforcement member 270 on the side of the bottom plate 211 facing away from the top plate 221, the reinforcement member 270 can reinforce the bottom plate 211 to enhance the structural strength of the bottom plate 211, thereby improving the installation firmness of the battery cell assembly 100 on the bottom plate 211.

[0167] like Figure 10 As shown, the reinforcement member 270 further defines a plurality of through slots 271 and has a plurality of reinforcement beams 272 separated by the plurality of through slots 271 .

[0168] The reinforcement 270 can cover the side of the bottom plate 211 facing away from the top plate 221. Considering the demand for lightweight design, the reinforcement 270 can also be provided with multiple through slots 271 and multiple reinforcing beams 272 separated by the multiple through slots 271, so that the reinforcement 270 can not only use the multiple through slots 271 to form a hollow area to reduce its own weight, but also use the multiple reinforcing beams 272 to reinforce the bottom plate 211.

[0169] Furthermore, a plurality of through-slots 271 may be spaced apart in the direction from the front plate 212 toward the rear plate 224, thereby forming a plurality of reinforcement beams 272 spaced apart in the direction from the front plate 212 toward the rear plate 224. Furthermore, the through-slots 271 may occupy a majority of the area of ​​the reinforcement member 270 in the width direction W, but may not penetrate the reinforcement member 270 on opposite sides in the width direction W, thereby forming cross beams 273 on opposite sides of the reinforcement member 270 in the width direction W. The cross beams 273 are then used to connect the plurality of reinforcement beams 272 together.

[0170] In some embodiments, the arrangement direction of the plurality of through-slots 271 can be adjusted as needed, and is not limited to being spaced apart in the direction from the front plate 212 to the rear plate 224. For example, the plurality of through-slots 271 can also be spaced apart in the width direction W. Furthermore, the area of ​​the through-slots 271 can also be selected based on the structural strength of the reinforcement 270, which will not be fully detailed in this embodiment.

[0171] In the above scheme, by setting up the reinforcement member 270, a plurality of through slots 271 can be opened, and a plurality of reinforcement beams 272 separated by the plurality of through slots 271 can be formed, so that the reinforcement member 270 can not only use the plurality of through slots 271 to form a hollow area to reduce its own weight, but also use the plurality of reinforcement beams 272 to reinforce the bottom plate 211.

[0172] like Figure 11 As shown, the box assembly 200 may further include: a plurality of fixing members 280 . The plurality of fixing members 280 are located in the accommodation space 201 and may be connected to the bottom plate 211 , and the fixing members 280 may be connected to the battery cell assembly 100 .

[0173] A fixing member 280 may be provided on the first surface 2111 and connected to the bottom plate 211. There may be two fixing members 280, and the two fixing members 280 may be disposed opposite each other in the length direction L, respectively disposed near the front plate 212 and the rear plate 224. The battery cell assembly 100 may be connected to the two fixing members 280, respectively, to be fixed to the bottom plate 211 via the two fixing members 280. In this embodiment, the fixing members 280 may be fixed beams, and the fixing members 280 and the bottom plate 211 may be fastened together by bolts or other structures.

[0174] In some embodiments, the number of the fixing members 280 can be three, four, five or more, and in addition to being arranged at intervals in the length direction L, the multiple fixing members 280 can also be arranged at intervals in the width direction W. It is only necessary that the fixing members 280 can be set on the bottom plate 211 and can be connected to the battery cell assembly 100.

[0175] In the above scheme, multiple fixing members 280 are arranged on one side of the bottom plate 211 located in the accommodating space 201, that is, the first surface 2111, and the multiple fixing members 280 can also be connected to the battery cell assembly 100, so that the fixing members 280 can replace the bottom plate 211 to be connected to the battery cell assembly 100, which can improve the installation firmness of the battery cell assembly 100 in the accommodating space 202.

[0176] like Figure 12 As shown, a portion of the front plate 212 may be recessed toward the accommodating space 201 to form a mounting groove 203 , and the mounting groove 203 may be used to mount functional components.

[0177] The front panel 212 can be used to mount the functional components 300 of the battery device 10. The functional components 300 may include, but are not limited to, a high-voltage connector 310, a low-voltage connector 320, an explosion-proof valve 330, and a CSC (Cell Supervision Circuit) device 340. The high-voltage connector 310, the low-voltage connector 320, the explosion-proof valve 330, and the CSC device 340 may all be disposed on the front panel 212 and exposed on the side of the front panel 212 facing away from the rear panel 224.

[0178] Furthermore, since the CSC device 340 is relatively large and thus protrudes a relatively high height on the side of the front plate 212 facing away from the rear plate 224, a portion of the front plate 212 can be recessed into the accommodating space 201 to form a mounting groove 203, thereby facilitating the installation of the CSC device 340. Of course, in addition to being used for installing the CSC device 340, the mounting groove 203 can also be used to install other large-sized functional devices included in the functional assembly 300.

[0179] In the above solution, a portion of the front panel 212 is recessed into the accommodation space 201 to form the mounting groove 203 , so that the mounting groove 203 can occupy a portion of the accommodation space 201 inwardly, thereby reducing the protrusion height of large-sized functional components such as the CSC device 340 on the front panel 212 .

[0180] Finally, in some specific application scenarios, in order to solve the problem of low space utilization of the box assembly of the existing battery device. The battery device 10 provided in the embodiment of the present application may include: a battery cell assembly 100 and a box assembly 200, and the box assembly 200 may include: a lower box 210 made of metal and an upper box 220 made of plastic; the lower box 210 includes: a bottom plate 211 and a front plate 212 connected to the bottom plate 211; the upper box 220 includes: a top plate 221 arranged opposite to the bottom plate 211, a first horizontal plate 222 and a second horizontal plate 223 both connected to the top plate 221 and arranged opposite to each other, and a plurality of first horizontal plates 222 and a second horizontal plate 223 connected to the top plate 221, the first horizontal plate 222 and the second horizontal plate 223 respectively. 23 is connected to the rear plate 224 which is arranged opposite to the front plate 212; wherein, at least one of the first transverse plate 222, the second transverse plate 223 and the rear plate 224 can be connected to the side surface of the bottom plate 211; at least one of the top plate 221, the first transverse plate 222 and the second transverse plate 223 can be connected to the side surface of the front plate 212; the bottom plate 211, the front plate 212, the top plate 221, the first transverse plate 222, the second transverse plate 223 and the rear plate 224 are jointly surrounded to form a accommodating space 201, and the battery cell assembly 100 is arranged in the accommodating space 201.

[0181] The bottom plate 211 has a first flange 2112 that is folded away from the top plate 221. The first flange 2112 forms the side surface of the bottom plate 211, and the first transverse plate 222, the second transverse plate 223, and the rear plate 224 are all connected to the first flange 2112. The front plate 212 has a second flange 2122 that is folded away from the rear plate 224. The second flange 2122 forms the side surface of the front plate 212, and the top plate 221, the first transverse plate 222, and the second transverse plate 223 are all connected to the second flange 2122. The bottom plate 211 and the front plate 212 are integrally structured, while the top plate 221, the first transverse plate 222, the second transverse plate 223, and the rear plate 224 are also integrally structured.

[0182] The first flange 2112 and the second flange 2122 are disconnected at the connection between the bottom plate 211 and the front plate 212, and a gap 202 is formed to connect to the accommodating space 201; the box assembly 200 also includes: a blocking member 230; the blocking member 230 is located at the gap 202, and is respectively connected to the first flange 2112 and the second flange 2122 to block the gap 202.

[0183] The box assembly 200 further includes a reinforcing member 240 . The reinforcing member 240 is located outside the accommodating space 201 and is disposed at the junction of the bottom plate 211 and the front plate 212 to reinforce the junction. The end of the reinforcing member 240 is positioned near the notch 202 and is connected to the blocking member 230 .

[0184] The box assembly 200 also includes: a sealing gasket 250; a portion of the sealing gasket 250 is located on the first flange 2112 and is connected to the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224; another portion of the sealing gasket 250 is also located on the second flange 2122 and is connected to the top plate 221, the first horizontal plate 222 and the second horizontal plate 223.

[0185] The box assembly 200 also includes: multiple fasteners 260; a portion of the fasteners 260 is passed through the first flange 2112, and locks the first horizontal plate 222, the second horizontal plate 223 and the rear plate 224 to the first flange 2112; another portion of the fasteners 260 is passed through the second flange 2122, and locks the top plate 221, the first horizontal plate 222 and the second horizontal plate 223 to the second flange 2122.

[0186] The box assembly 200 provided in the embodiment of the present application is provided with a lower box 210 comprising: a bottom plate 211 and a front plate 212 connected to the bottom plate 211, and an upper box 220 comprising: a top plate 221, a first transverse plate 222, a second transverse plate 223, and a rear plate 224 that can be used together with the bottom plate 211 and the front plate 212 to enclose a storage space 201. This simplifies the structure of the lower box 210 on the side of the bottom plate 211 facing the top plate 221. Furthermore, by providing at least one of the first transverse plate 222, the second transverse plate 223, and the rear plate 224 connected to the side surface of the bottom plate 211, and at least one of the top plate 221, the first transverse plate 222, and the second transverse plate 223 connected to the side surface of the front plate 212, the space occupied on the side of the bottom plate 211 facing the top plate 221 and the side of the front plate 212 facing the rear plate 224 can be reduced, thereby improving the space utilization of the box assembly 200.

[0187] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: The battery device includes: a battery cell assembly and a box assembly; The box assembly includes: a lower box and an upper box; the lower box includes: a bottom plate and a front plate connected to the bottom plate; the upper box includes: a top plate arranged opposite to the bottom plate, a first transverse plate and a second transverse plate both connected to the top plate and arranged opposite to each other, and a rear plate respectively connected to the top plate, the first transverse plate and the second transverse plate and arranged opposite to the front plate; wherein, At least one of the first transverse plate, the second transverse plate and the rear plate is connected to the side surface of the bottom plate; at least one of the top plate, the first transverse plate and the second transverse plate is connected to the side surface of the front plate; the bottom plate, the front plate, the top plate, the first transverse plate, the second transverse plate and the rear plate are jointly arranged to form a storage space, and the battery cell assembly is arranged in the storage space.

2. The battery device according to claim 1, wherein: The bottom plate has a first flange that is folded in a direction away from the top plate; The first flange is formed on a side surface of the bottom plate, and at least one of the first transverse plate, the second transverse plate, and the rear plate is connected to the first flange.

3. The battery device according to claim 1 or 2, characterized in that The front plate has a second flange that is folded away from the rear plate; The second flange is formed on a side surface of the front plate, and at least one of the top plate, the first transverse plate, and the second transverse plate is connected to the second flange.

4. The battery device according to claim 2, wherein: The first transverse plate, the second transverse plate and the rear plate are all connected to the first flange; The front plate has a second flange folded in a direction away from the rear plate; the second flange forms a side surface of the front plate, and the top plate, the first transverse plate and the second transverse plate are all connected to the second flange.

5. The battery device according to claim 4, characterized in that The first flange and the second flange are disconnected at the connection between the bottom plate and the front plate, and a gap is formed to communicate with the accommodation space; The box assembly further includes a blocking piece, which is located at the gap and is connected to the first flange and the second flange respectively to block the gap.

6. The battery device according to claim 5, characterized in that The box assembly further includes: a reinforcement member; The reinforcing piece is located outside the accommodating space and is provided at the connection between the bottom plate and the front plate to reinforce the connection between the bottom plate and the front plate.

7. The battery device according to claim 6, characterized in that The end of the reinforcing piece is arranged close to the notch and connected to the blocking piece.

8. The battery device according to claim 4, wherein: The first flange and the second flange are disconnected at the connection between the bottom plate and the front plate, and a gap is formed to communicate with the accommodation space; The box assembly also includes: a reinforcing piece; the reinforcing piece is located outside the accommodating space and is provided at the connection between the bottom plate and the front plate to reinforce the connection between the bottom plate and the front plate; the end of the reinforcing piece is located at the notch and is respectively connected to the first flange and the second flange to seal the notch.

9. The battery device according to claim 4, characterized in that The box assembly further includes: a sealing gasket; A portion of the sealing gasket is provided on the first flange and is connected to the first transverse plate, the second transverse plate and the rear plate; another portion of the sealing gasket is also provided on the second flange and is connected to the top plate, the first transverse plate and the second transverse plate.

10. The battery device according to claim 9, characterized in that The box assembly further includes: a plurality of fasteners; A portion of the fasteners is passed through the first flange and locks the first transverse plate, the second transverse plate and the rear plate to the first flange; another portion of the fasteners is passed through the second flange and locks the top plate, the first transverse plate and the second transverse plate to the second flange.

11. The battery device according to claim 10, characterized in that The sealing gasket is located on the penetration path of the fastener and has a through hole for the fastener to penetrate.

12. The battery device according to claim 10, wherein: The fastener is located on the inner side of the sealing gasket close to the accommodating space; or, the fastener is located on the outer side of the sealing gasket away from the accommodating space.

13. The battery device according to claim 1, wherein: The box assembly further includes a reinforcement member connected to the bottom plate, and the reinforcement member is arranged on a surface of the bottom plate facing away from the top plate.

14. The battery device according to claim 13, wherein: The reinforcement is further provided with a plurality of through slots and has a plurality of reinforcement beams separated by the plurality of through slots.

15. The battery device according to claim 1, wherein: The box assembly further includes: a plurality of fixing members; The plurality of fixing members are located in the accommodation space and connected to the bottom plate, and the fixing members are connected to the battery monomer assembly.

16. The battery device according to claim 1, wherein: A partial area of ​​the front plate is recessed toward the accommodating space to form a mounting groove, and the mounting groove is used for mounting functional components.

17. The battery device according to claim 1, wherein: The bottom plate and the front plate are an integrated structure; the top plate, the first transverse plate, the second transverse plate and the rear plate are an integrated structure.

18. The battery device according to claim 4, wherein: The width of the first flange in the direction from the top plate to the bottom plate is 20-30 mm; the width of the second flange in the direction from the rear plate to the front plate is 20-30 mm.

19. A battery device, characterized in that: The battery device includes: a battery cell assembly and a box assembly; The box assembly includes: a metal box and a plastic box; the metal box includes: a bottom plate and a front plate connected to the bottom plate; the plastic box includes: a top plate arranged opposite to the bottom plate, a first horizontal plate and a second horizontal plate both connected to the top plate and arranged opposite to each other, and a back plate respectively connected to the top plate, the first horizontal plate and the second horizontal plate and arranged opposite to the front plate; wherein, At least one of the first transverse plate, the second transverse plate and the rear plate is connected to the side surface of the bottom plate; at least one of the top plate, the first transverse plate and the second transverse plate is connected to the side surface of the front plate; the bottom plate, the front plate, the top plate, the first transverse plate, the second transverse plate and the rear plate are jointly arranged to form a storage space, and the battery cell assembly is arranged in the storage space.

20. An electrical device, characterized in that: The electrical device comprises: the battery device according to any one of claims 1-19.

21. An energy storage device, characterized in that: The energy storage device comprises: the battery device according to any one of claims 1-19.

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