Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the field of batteries, the battery device comprises a box body and a battery monomer, the battery monomer is arranged in the box body, the box body is provided with a box body bottom wall, and the box body bottom wall is located below the battery monomer to support the battery monomer along the height direction of the battery device; the box body bottom wall comprises a plurality of box body bottom wall parts, the plurality of box body bottom wall parts are arranged along a plane perpendicular to the height direction of the battery device, every two adjacent box body bottom wall parts are fixedly connected, and part of the box body bottom wall parts are constructed into heat exchange wall parts which are used for exchanging heat with mating parts. Therefore, part of the box body bottom wall parts in the plurality of box body bottom wall parts arranged along the plane are constructed into the heat exchange wall parts, so that the space in the height direction of the battery device can be saved on the basis that the box body bottom wall parts can provide a heat exchange function, the space utilization rate is improved, the weight of the battery device can be reduced, and the lightweight design of the battery device is facilitated.

Description

Technical Field

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

[0002] In the related art, a base plate is provided at the bottom of the battery device, and the base plate is used to support the components inside the battery device. If it is necessary to add a heat exchange structure such as a water cooling plate at the bottom of the battery device, the water cooling plate can be fixed to the inner side of the base plate, that is, the water cooling plate and the base plate are overlapped in the thickness direction. This not only takes up a lot of space in the thickness direction, resulting in reduced space utilization, but also the multi-layer plate structure also increases the weight of the battery device, which is not conducive to the lightweight design of the battery device. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a battery device, which can improve space utilization by configuring part of the bottom wall portions of a plurality of bottom wall portions of a box arranged along a plane as heat exchange wall portions, and is conducive to the lightweight design of the battery device.

[0004] The present application further proposes an electrical device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising:

[0006] A box body and a battery cell, the battery cell is arranged in the box body, the box body has a box body bottom wall, along the height direction of the battery device, the box body bottom wall is located below the battery cell to support the battery cell, the box body bottom wall includes a plurality of box body bottom wall portions, the plurality of box body bottom wall portions are arranged along a plane perpendicular to the height direction of the battery device, and two adjacent box body bottom wall portions are fixedly connected, and some of the plurality of box body bottom wall portions are constructed as heat exchange wall portions, which are used to exchange heat with matching parts.

[0007] In the above technical solution, by making some of the bottom walls of the multiple box bodies arranged along the plane into heat exchange wall portions, it is possible to save space in the height direction of the battery device on the basis of the bottom wall of the box body being able to provide a heat exchange function, thereby improving space utilization, and reducing the weight of the battery device, which is beneficial to the lightweight design of the battery device.

[0008] In some embodiments, the plurality of box bottom walls include: a first box bottom wall and a second box bottom wall, the first box bottom wall is configured as a heat exchange wall, and along the height direction of the battery device, the inner surface of the first box bottom wall is flush with the inner surface of the second box bottom wall.

[0009] In the above technical solution, along the height direction of the battery device, by making the inner surface of the bottom wall of the first box body flush with the inner surface of the bottom wall of the second box body, the inner surface of the bottom wall of the box body can be made flat, which is convenient for fixing and connecting any two adjacent bottom wall parts of the box body, thereby facilitating the production and manufacturing of the box body, and facilitating the arrangement of components such as battery cells and fittings on the inner surface of the bottom wall of the box body, thereby reducing the difficulty of assembling the battery device.

[0010] In some embodiments, the plurality of box bottom walls include: a first box bottom wall and a second box bottom wall, the first box bottom wall is configured as a heat exchange wall, and along the height direction of the battery device, the inner surface of the first box bottom wall is lower than the inner surface of the second box bottom wall.

[0011] In the above technical solution, along the height direction of the battery device, by making the inner surface of the bottom wall of the first box body lower than the inner surface of the bottom wall of the second box body, more space can be reserved for the matching parts, which is convenient for the arrangement of the matching parts and the connection between the matching parts and other components. Taking the matching parts as a distribution box as an example, such a configuration can reserve more space for the distribution box, which is convenient for the arrangement of the distribution box and the connection of the distribution box to high voltage, which is beneficial to reduce the difficulty of assembling the battery device and improve the space utilization rate.

[0012] In some embodiments, the plurality of box bottom walls include: a first box bottom wall and a second box bottom wall, the first box bottom wall being configured as a heat exchange wall, and along the height direction of the battery device, an inner surface of the first box bottom wall is higher than an inner surface of the second box bottom wall.

[0013] In the above technical solution, along the height direction of the battery device, by making the inner surface of the bottom wall of the first box body higher than the inner surface of the bottom wall of the second box body, more space can be reserved for battery cells, so that more battery cells can be arranged, which is beneficial to improving space utilization and improving the energy density of the battery device, thereby increasing the capacity of the battery device. When the battery device is applied to a vehicle, it can increase the vehicle's cruising range.

[0014] In some embodiments, the battery device also includes: a protective structure, multiple box bottom wall portions including a first box bottom wall portion and a second box bottom wall portion, the first box bottom wall portion is configured as a heat exchange wall portion, and the protective structure is arranged below the first box bottom wall portion and fixedly connected to the second box bottom wall portion.

[0015] In the above technical solution, by arranging the protective structure below the bottom wall of the first box body, the strength of the bottom wall of the first box body can be reinforced to improve the overall structural strength of the battery device, and the heat exchange wall can be protected by the protective device to reduce the risk of damage to the heat exchange wall due to impact and collision, thereby improving the safety of use. By fixedly connecting the protective structure to the bottom wall of the second box body, the protective structure and the bottom wall of the second box body can form a unified whole, greatly improving the impact resistance of the bottom wall of the box body, which is conducive to improving the battery device's ability to resist side column collision and bottom ball.

[0016] In some embodiments, the protective structure is spaced apart from the corresponding first box bottom wall portion to form a buffer space between the protective structure and the corresponding first box bottom wall portion.

[0017] In the above technical solution, by separating the protective structure from the corresponding first box bottom wall, a buffer space can be formed between the protective structure and the corresponding first box bottom wall. When the protective structure is impacted, the buffer space can play a role in collapse and energy absorption, so as to reduce the risk of damage to the heat exchange wall, thereby improving safety of use.

[0018] In some embodiments, the battery device further includes: an energy absorbing structure, which is disposed in the buffer space.

[0019] In the above technical solution, by arranging the energy-absorbing structure in the buffer space, when the protective structure is hit, the impact force can be absorbed by the energy-absorbing structure, thereby effectively reducing the intensity of the impact force transmitted to the bottom wall of the first box body, and reducing the risk of damage to the bottom wall of the first box body due to excessive impact force, thereby effectively improving the safety of the battery device.

[0020] In some embodiments, along the height direction of the battery device, the outer surface of the bottom wall of the first box body is higher than the outer surface of the bottom wall of the second box body, and the outer surface of the protective structure is flush with the outer surface of the bottom wall of the second box body.

[0021] In the above technical solution, by making the outer surface of the bottom wall of the first box body higher than the outer surface of the bottom wall of the second box body, installation space can be provided for the protective structure. By making the outer surface of the protective structure flush with the outer surface of the bottom wall of the second box body, the probability of the protective structure and the second box body bottom wall forming a step shape and colliding with protruding stones, shoulders, etc. can be reduced, which is beneficial to improving the reliability of the battery device. In addition, it is also convenient to set other protective parts or coatings on the outer surface of the protective structure and the bottom wall of the second box body to reduce the difficulty of manufacturing the battery device.

[0022] In some embodiments, along the height direction of the battery device, an outer surface of the protective structure and / or an outer surface of the bottom wall of the second box body is provided with a protective layer.

[0023] In the above technical solution, by providing a protective layer on the outer surface of the protective structure and / or the outer surface of the bottom wall of the second box body, the impact resistance of the battery device can be improved, which is beneficial to improving the reliability of the battery device. In addition, compared with providing a protective plate structure, the protective layer is lighter in weight, which is beneficial to the lightweight design of the battery device. When the battery device is applied to a vehicle, the vehicle's cruising range can be improved.

[0024] In some embodiments, along the height direction of the battery device, the second box bottom wall portion is disposed corresponding to the battery cell to support the battery cell, and the first box bottom wall portion is disposed staggered with the battery cell.

[0025] In the above technical solution, along the height direction of the battery device, the second box bottom wall is arranged corresponding to the battery cell to support the battery cell, and the first box bottom wall is arranged staggered with the battery cell. The battery device can be partitioned to facilitate the assembly and maintenance of the battery device. Moreover, the risk of the matching parts contacting and interfering with the battery cell can be reduced, thereby improving the reliability of the battery device.

[0026] In some embodiments, the battery device further includes: a conversion piece, wherein the conversion piece is connected between at least two adjacent bottom wall portions of the box body.

[0027] In the above technical solution, by setting up an adapter, two adjacent bottom walls of the box body with uneven inner surface heights can be connected as a whole, and two adjacent bottom walls of the box body with different materials can be connected as a whole, thereby effectively improving the structural strength and impact resistance of the bottom wall of the box body, which is beneficial to improving the reliability of the battery device.

[0028] In some embodiments, the mating component is configured as a battery cell, or the mating component is configured as a distribution box connected to the battery cell.

[0029] In the above technical solution, by constructing the matching parts as battery cells or distribution boxes connected to the battery cells, the temperature of the battery cells or the distribution boxes connected to the battery cells can be adjusted through the heat exchange wall, so that the battery cells or the distribution boxes connected to the battery cells can work in an appropriate temperature range for a long time.

[0030] In some embodiments, the bottom wall of the second box body includes two flat plate structures and a plurality of reinforcing plates, the two flat plate structures are arranged at intervals, and the plurality of reinforcing plates are connected between the two flat plate structures.

[0031] In the above technical solution, by making the bottom wall of the second box body include two flat structures and multiple reinforcing plates, and making the multiple reinforcing plates connected between the two flat structures, it is beneficial to improve the battery device's ability to resist side column collision and to improve the battery device's ability to resist bottom balls.

[0032] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 is a schematic diagram of an electrical device according to an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of a battery device according to an embodiment of the present application;

[0037] Figure 3 is a schematic diagram of another embodiment of a battery device according to an embodiment of the present application;

[0038] Figure 4 yes Figure 3 A schematic diagram of the battery device shown from another angle;

[0039] Figure 5 yes Figure 4 Sectional view at CC;

[0040] Figure 6 yes Figure 5 Enlarged schematic diagram of point D in the middle.

[0041] Reference numerals:

[0042] Battery device 100;

[0043] Box body 10; first box body 11; second box body 12;

[0044] Box bottom wall 101; box bottom wall portion 102; first box bottom wall portion 1021; second box bottom wall portion 1022; profile plate 1023; flat plate structure 10231; reinforcing plate 10232;

[0045] Heat exchange wall 103; accommodating space 104; partition plate 105; pipeline 106;

[0046] Battery cell 20;

[0047] Protective structure 30; buffer space 31; protective layer 32; adapter 33; heat exchange plate 34; matching part 35; distribution box 36;

[0048] Electrical equipment 200; controller 201; motor 202. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0051] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0054] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0055] The term “plurality” used in this application refers to two or more (including two).

[0056] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0057] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0058] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, which is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0059] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0060] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0061] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0062] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0063] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0064] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0065] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0066] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0067] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0068] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0069] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. The battery device consists of a box and multiple battery cells contained in the box. Among them, the battery device, as a core component of new energy vehicles, has high requirements in terms of safety and cycle life.

[0070] In a general battery device, a base plate is provided at the bottom of the battery device, and the base plate is used to support the components inside the battery device. If it is necessary to add a heat exchange structure such as a water cooling plate at the bottom of the battery device, the water cooling plate can be fixed to the inner side of the base plate, that is, the water cooling plate and the base plate are overlapped in the thickness direction. This not only takes up a lot of space in the thickness direction, resulting in reduced space utilization, but also the multi-layer plate structure also increases the weight of the battery device, which is not conducive to the lightweight design of the battery device.

[0071] Based on the above considerations, in order to solve the problem of reduced space utilization and unfavorable lightweight design of the battery device, after in-depth research, a battery device was designed, including: a box body and a battery cell, the battery cell is arranged in the box body, the box body has a box body bottom wall, along the height direction of the battery device, the box body bottom wall is located below the battery cell to support the battery cell, the box body bottom wall includes a plurality of box body bottom wall portions, the plurality of box body bottom wall portions are arranged along a plane perpendicular to the height direction of the battery device, and any two adjacent box body bottom wall portions are fixedly connected, and at least one box body bottom wall portion is constructed as a heat exchange wall portion, and the heat exchange wall portion is used to exchange heat with a matching part.

[0072] In a battery device of this structure, by configuring some of the bottom walls of the multiple box bodies arranged along a plane as heat exchange walls, it is possible to save space in the height direction of the battery device while still providing a heat exchange function. This improves space utilization and reduces the weight of the battery device, which is beneficial to the lightweight design of the battery device.

[0073] The battery device disclosed in the embodiments of the present application can be used in, but is not limited to, electrical equipment such as vehicles, ships, or aircraft.

[0074] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0075] For the convenience of description, the following embodiments are described by taking an electric device 200 of an embodiment of the present application as a vehicle as an example.

[0076] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 may be provided at the bottom, head or tail of the vehicle. The battery device 100 may be used to power the vehicle, for example, the battery device 100 may be used as an operating power source for the vehicle. The vehicle may also include a controller 201 and a motor 202, and the controller 201 is used to control the battery device 100 to power the motor 202, for example, for starting, navigating and driving the vehicle.

[0077] In some embodiments of the present application, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0078] Please refer to Figure 2 , Figure 2The structural exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a plurality of battery cells 20, and the battery cells 20 are used to be accommodated in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery cells 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cells 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0079] In the battery device 100, multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 20 are connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 20.

[0080] Reference below Figure 3-Figure 6 A battery device 100 according to an embodiment of the present application is described.

[0081] According to some embodiments of the present application, the present application provides a battery device 100, including: a box body 10 and a battery cell 20, the battery cell 20 is arranged in the box body 10, the box body 10 has a box body bottom wall 101, along the height direction of the battery device 100, the box body bottom wall 101 is located below the battery cell 20 to support the battery cell 20, the box body bottom wall 101 includes a plurality of box body bottom wall portions 102, the plurality of box body bottom wall portions 102 are arranged along a plane perpendicular to the height direction of the battery device 100, and two adjacent box body bottom wall portions 102 are fixedly connected, and some of the plurality of box body bottom wall portions 102 are configured as heat exchange wall portions 103, and the heat exchange wall portions 103 are used to exchange heat with the mating component 35.

[0082] The box body 10 defines a receiving space 104, and the battery cell 20 is disposed in the receiving space 104. The number of the battery cell 20 can be set to one, or the number of the battery cell 20 can be set to multiple. As some embodiments of the present application, the multiple battery cells 20 are arranged along the first direction (i.e. Figure 3 The battery cells are arranged in sequence along the second direction (i.e. Figure 3 In the Y direction shown in the figure), multiple rows of battery cells are arranged in sequence, and the multiple rows of battery cells are constructed into a group of battery modules. The number of battery modules can be one group, or the number of battery modules can be multiple groups.

[0083] The battery cell 20 is disposed in the accommodation space 104 and placed on the bottom wall 101 of the box body. In other words, along the height direction (i.e. Figure 3 The box bottom wall 101 is located below the battery cell 20 to support the battery cell 20. The box bottom wall 101 includes a plurality of box bottom wall portions 102. For example, the box bottom wall 101 includes but is not limited to two, three, or four box bottom wall portions 102. The plurality of box bottom wall portions 102 are arranged along a direction perpendicular to the height direction of the battery device 100 (i.e., Figure 3 For example, the plurality of bottom wall portions 102 of the box body are arranged along the first direction (ie, the Z direction shown in FIG. Figure 3 The X direction shown in the figure) are arranged in sequence to form a bottom wall row of the box body, and along the second direction (i.e. Figure 3 In the Y direction shown in the figure), multiple rows of box bottom wall portions are arranged in sequence, and the multiple rows of box bottom wall portions 102 are constructed as a group of box bottom wall portion groups. The number of box bottom wall portion groups can be one group, or the number of box bottom wall portion groups can be multiple groups.

[0084] Two adjacent box bottom walls 102 are fixedly connected, that is, each box bottom wall 102 is fixedly connected to an adjacent box bottom wall 102, and the method of fixing the two adjacent box bottom walls 102 may be but is not limited to bolt connection, welding connection, etc., or the two adjacent box bottom walls 102 are integrally formed.

[0085] Among the multiple box bottom wall portions 102 , at least one box bottom wall portion 102 is configured as a heat exchange wall portion 103 , and the heat exchange wall portion 103 is used for exchanging heat with the matching component 35 .

[0086] As some embodiments of the present application, among the multiple box bottom wall portions 102, some of the box bottom wall portions 102 are constructed as heat exchange wall portions 103, wherein the box bottom wall portions 102 constructed as heat exchange wall portions 103 and the remaining box bottom wall portions 102 can be arranged on both sides, or the box bottom wall portions 102 constructed as heat exchange wall portions 103 and the remaining box bottom wall portions 102 can be arranged alternately.

[0087] The fitting 35 can be arranged on the bottom wall portion 102 of the box body constructed as a heat exchange wall portion 103, so as to perform heat exchange with the fitting 35 through the heat exchange wall portion 103, so as to adjust the temperature of the fitting 35, so that the fitting 35 can work in a suitable temperature range for a long time, and the battery cell 20 can be arranged on the remaining bottom wall portion 102 of the box body, so as to support the battery cell 20 through the bottom wall portion 102 of the box body, and, as some embodiments of the present application, a large surface of the battery cell 20 can be provided with a heat exchange plate 34, so as to adjust the temperature of the battery cell 20 through the heat exchange plate 34, so that the battery cell 20 can work in a suitable temperature range for a long time.

[0088] Alternatively, some of the battery cells 20 may be arranged on the bottom wall 102 of the box body constructed as a heat exchange wall 103, so as to perform heat exchange with the battery cells 20 through the heat exchange wall 103, so as to adjust the temperature of the battery cells 20, so that the battery cells 20 can work in an appropriate temperature range for a long time; another part of the battery cells 20 may be arranged on the remaining bottom wall 102 of the box body, so as to support the battery cells 20 through the bottom wall 102 of the box body; the fitting 35 may be arranged on the heat exchange wall 103, and, as some embodiments of the present application, a large surface of the battery cell 20 may be provided with a heat exchange plate 34, so as to more effectively adjust the temperature of the battery cell 20; and, as some embodiments of the present application, the fitting 35 may be provided with a heat exchange plate 34, so as to adjust the temperature of the fitting 35 through the heat exchange plate 34, so that the fitting 35 can work in an appropriate temperature range for a long time.

[0089] As some embodiments of the present application, a heat exchange medium may flow in the heat exchange wall portion 103, and the heat exchange medium may be but is not limited to water or a phase change material. Moreover, the heat exchange wall portion 103 may be connected to the heat exchange plate 34 mentioned above. For example, the heat exchange wall portion 103 may be connected to the heat exchange plate 34 mentioned above through a pipe 106.

[0090] As some embodiments of the present application, all bottom walls 102 of the box body can be constructed as heat exchange walls 103, which are used to exchange heat with the fittings 35. Moreover, the heat exchange walls 103 are located below the battery cells 20 to support the battery cells 20 and exchange heat with the battery cells 20 to adjust the temperature of the fittings 35 and the battery cells 20, so that the fittings 35 and the battery cells 20 can operate in a suitable temperature range for a long time.

[0091] As some embodiments of the present application, the fitting 35 may be constructed as, but not limited to, a battery cell 20 , a distribution box 36 , a bus bar, or other components that may be placed in the box 10 .

[0092] As some embodiments of the present application, along the height direction of the battery device 100 (i.e. Figure 3In the Z direction shown in the figure), the orthographic projection of the bottom wall 101 of the box body covers the outside of the orthographic projections of all the battery cells 20, that is, the orthographic projections of all the battery cells 20 are included in the orthographic projection of the bottom wall 101 of the box body, or it can also be understood that the orthographic projection of the bottom wall 101 of the box body is perpendicular to the height direction of the battery device 100 (i.e. Figure 3 In the plane of the Z direction (shown in the figure), the distance between the outer contour of the bottom wall 101 of the box and the center line of the battery device 100 is greater than the distance between the outer contour of the outermost battery cell 20 and the center line of the battery device 100, so that the bottom wall 101 of the box can stably support the battery cell 20.

[0093] As some embodiments of the present application, multiple box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022. The number of first box bottom wall portions 1021 may be one, or the number of first box bottom wall portions 1021 may be multiple, the number of second box bottom wall portions 1022 may be one, or the number of second box bottom wall portions 1022 may be multiple. This document describes the multiple box bottom wall portions 102 including a first box bottom wall portion 1021 and a second box bottom wall portion 1022 as an example.

[0094] Along the second direction (i.e. Figure 3 In the Y direction shown in the figure), the first box bottom wall portion 1021 and the second box bottom wall portion 1022 are arranged, the first box bottom wall portion 1021 is configured as a heat exchange wall portion 103, and the second box bottom wall portion 1022 is located below the battery cell 20 to support the battery cell 20. The second box bottom wall portion 1022 can be configured as a profile plate 1023, such as Figure 6 As shown, the profile plate 1023 may include two Figure 3 The battery device 100 is provided with a plurality of plate structures 10231 spaced apart from each other (in the Z direction shown in the figure), and a plurality of reinforcing plates 10232 connected between the two plate structures 10231, which is conducive to improving the anti-side column collision ability and the anti-bottom ball ability of the battery device 100. The first bottom wall portion 1021 of the box body is located below the fitting 35 to support the fitting 35 and to perform heat exchange with the fitting 35 to adjust the temperature of the fitting 35. A partition plate 105 may be provided in the accommodating space 104, and the partition plate 105 is connected to the bottom wall 101 of the box body and separates the battery cell 20 from the fitting 35, so as to design the battery device 100 in a partitioned manner, for example, the battery device 100 is divided into an energy zone (an area for accommodating the battery cell 20) and a functional zone (an area for accommodating the fitting 35), so as to facilitate the assembly and maintenance of the battery device 100.

[0095] A heat exchange plate 34 can be attached to the large surface of the battery cell 20, and the heat exchange plate 34 can be used to adjust the temperature of the battery cell 20. A heat exchange medium can flow in the heat exchange wall 103, and the heat exchange medium can be but not limited to water or phase change material. The heat exchange wall 103 is connected to the heat exchange plate 34.

[0096] The first direction (i.e. Figure 3 The X direction shown), the second direction (i.e. Figure 3 The Y direction shown in FIG. 1 ), the height direction of the battery device 100 (i.e. Figure 3 Any two directions in the Z direction (shown) are perpendicular to each other.

[0097] It should be noted that by making the plurality of bottom wall portions 102 of the box body perpendicular to the height direction of the battery device 100 (i.e. Figure 3 The planar arrangement of the plurality of box bottom wall portions 102 (in the Z direction shown), and making some of the box bottom wall portions 102 in the plurality of box bottom wall portions 102 be constructed as heat exchange wall portions 103, can make the box bottom wall 101 have the function of regulating the temperature, and can save the space in the height direction of the battery device 100, improve the space utilization rate, thereby increasing the arrangement space of the matching parts 35 or other components, and can facilitate the arrangement of the matching parts 35 or other components. Moreover, the installation space of the battery cell 20 can be increased, which is beneficial to increase the energy density of the battery device 100 and improve the space utilization rate. In addition, such an arrangement can reduce the thickness of the box bottom wall 101, thereby reducing the weight of the battery device 100. When the battery device 100 is applied to a vehicle, it is beneficial to the lightweight design of the vehicle.

[0098] In the above technical solution, by making some of the box bottom wall portions 102 arranged along the plane be constructed as heat exchange wall portions 103, it is possible to save space in the height direction of the battery device 100 on the basis of the box bottom wall 101 being able to provide a heat exchange function, thereby improving space utilization, and reducing the weight of the battery device 100, which is beneficial to the lightweight design of the battery device 100.

[0099] In some embodiments of the present application, multiple box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022, the first box bottom wall portion 1021 is configured as a heat exchange wall portion 103, and along the height direction of the battery device 100, the inner surface of the first box bottom wall portion 1021 is flush with the inner surface of the second box bottom wall portion 1022.

[0100] The plurality of box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022. The number of the first box bottom wall portion 1021 may be one, or the number of the first box bottom wall portion 1021 may be multiple, and the number of the second box bottom wall portion 1022 may be one, or the number of the second box bottom wall portion 1022 may be multiple. The first box bottom wall portion 1021 is configured as a heat exchange wall portion 103.

[0101] Along the height direction of the battery device 100 (i.e. Figure 3 The inner surface of the first box bottom wall 1021 is flush with the inner surface of the second box bottom wall 1022. The inner surface of the first box bottom wall 1021 is flush with the inner surface of the second box bottom wall 1022, which can be understood as the inner surface of the first box bottom wall 1021 and the inner surface of the second box bottom wall 1022 being flush with each other along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the upper surface of the first box bottom wall portion 1021 is flush with the upper surface of the second box bottom wall portion 1022, or it can be understood that the surface of the first box bottom wall portion 1021 facing the accommodating space 104 is flush with the surface of the second box bottom wall portion 1022 facing the accommodating space 104.

[0102] The inner surface of the first box bottom wall 1021 is flush with the inner surface of the second box bottom wall 1022, which can make the inner surface of the box bottom wall 101 flat, and facilitate the fixed connection of any two adjacent box bottom walls 102, thereby facilitating the production and manufacturing of the box 10. In addition, such an arrangement facilitates the arrangement of components such as the battery cell 20 and the fitting 35 on the inner surface of the box bottom wall 101, thereby reducing the difficulty of assembling the battery device 100. In addition, the second box bottom wall 1022 and the first box bottom wall 1021 can protect the fitting 35 and the battery cell 20, which is conducive to improving the battery device 100's ability to resist side column collision and bottom ball collision.

[0103] In the above technical solution, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), by making the inner surface of the first box bottom wall portion 1021 flush with the inner surface of the second box bottom wall portion 1022, the inner surface of the box bottom wall 101 can be made flat, which is convenient for fixing and connecting any two adjacent box bottom wall portions 102, thereby facilitating the production and manufacturing of the box 10, and facilitating the arrangement of components such as the battery cell 20 and the fitting 35 on the inner surface of the box bottom wall 101, thereby reducing the difficulty of assembling the battery device 100.

[0104] In some embodiments of the present application, Figure 6 As shown, the plurality of box bottom walls 102 include: a first box bottom wall 1021 and a second box bottom wall 1022. The first box bottom wall 1021 is configured as a heat exchange wall 103. Figure 3 In the Z direction shown in the figure), the inner surface of the first box bottom wall portion 1021 is lower than the inner surface of the second box bottom wall portion 1022.

[0105] The plurality of box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022. The number of the first box bottom wall portion 1021 may be one, or the number of the first box bottom wall portion 1021 may be multiple, and the number of the second box bottom wall portion 1022 may be one, or the number of the second box bottom wall portion 1022 may be multiple. The first box bottom wall portion 1021 is configured as a heat exchange wall portion 103.

[0106] Along the height direction of the battery device 100 (i.e. Figure 3 The inner surface of the first box bottom wall 1021 is lower than the inner surface of the second box bottom wall 1022. The inner surface of the first box bottom wall 1021 is lower than the inner surface of the second box bottom wall 1022, which can be understood as follows: along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the upper surface of the first box bottom wall portion 1021 is lower than the upper surface of the second box bottom wall portion 1022, or it can be understood that the surface of the first box bottom wall portion 1021 facing the accommodating space 104 is lower than the surface of the second box bottom wall portion 1022 facing the accommodating space 104.

[0107] Taking the example that the second box bottom wall 1022 is located below the battery cell 20 to support the battery cell 20, and the first box bottom wall 1021 is located below the fitting 35 to support the fitting 35 and perform heat exchange with the fitting 35, such a configuration can leave more space for the fitting 35, facilitate the arrangement of the fitting 35, and facilitate the connection of the fitting 35 with other components. Taking the example that the fitting 35 is constructed as a distribution box 36, such a configuration can leave more space for the distribution box 36, facilitate the arrangement of the distribution box 36, and facilitate the connection of the distribution box 36 to high voltage.

[0108] In the above technical solution, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), by making the inner surface of the bottom wall portion 1021 of the first box body lower than the inner surface of the bottom wall portion 1022 of the second box body, more space can be reserved for the fitting 35, which is convenient for the arrangement of the fitting 35 and the connection between the fitting 35 and other parts. Taking the fitting 35 as a distribution box 36 as an example, such a configuration can reserve more space for the distribution box 36, which is convenient for the arrangement of the distribution box 36 and the connection of the distribution box 36 to high voltage, which is beneficial to reduce the difficulty of assembling the battery device 100 and improve the space utilization rate.

[0109] In some embodiments of the present application, the plurality of box bottom walls 102 include: a first box bottom wall 1021 and a second box bottom wall 1022, wherein the first box bottom wall 1021 is configured as a heat exchange wall 103, and the heat exchange wall 103 is formed along the height direction of the battery device 100 (i.e., Figure 3 In the Z direction shown in the figure), the inner surface of the first box bottom wall portion 1021 is higher than the inner surface of the second box bottom wall portion 1022.

[0110] The plurality of box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022. The number of the first box bottom wall portion 1021 may be one, or the number of the first box bottom wall portion 1021 may be multiple, and the number of the second box bottom wall portion 1022 may be one, or the number of the second box bottom wall portion 1022 may be multiple. The first box bottom wall portion 1021 is configured as a heat exchange wall portion 103.

[0111] Along the height direction of the battery device 100 (i.e. Figure 3 The inner surface of the first box bottom wall 1021 is higher than the inner surface of the second box bottom wall 1022. The inner surface of the first box bottom wall 1021 is higher than the inner surface of the second box bottom wall 1022, which can be understood as follows: along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the upper surface of the first box bottom wall portion 1021 is higher than the upper surface of the second box bottom wall portion 1022, or it can be understood that the surface of the first box bottom wall portion 1021 facing the accommodating space 104 is higher than the surface of the second box bottom wall portion 1022 facing the accommodating space 104.

[0112] Taking the example that the second box bottom wall portion 1022 is located below the battery cell 20 to support the battery cell 20, and the first box bottom wall portion 1021 is located below the fitting 35 to support the fitting 35 and perform heat exchange with the fitting 35, such a configuration can leave more space for the battery cell 20, so that more battery cells 20 can be arranged, which is beneficial to improving space utilization and improving the energy density of the battery device 100, thereby increasing the capacity of the battery device 100. When the battery device 100 is applied to a vehicle, it can increase the vehicle's cruising range.

[0113] In the above technical solution, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), by making the inner surface of the bottom wall portion 1021 of the first box body higher than the inner surface of the bottom wall portion 1022 of the second box body, more space can be reserved for the battery cells 20, so that more battery cells 20 can be arranged, which is beneficial to improving the space utilization rate and the energy density of the battery device 100, thereby increasing the capacity of the battery device 100. When the battery device 100 is applied to a vehicle, the driving range of the vehicle can be increased.

[0114] In some embodiments of the present application, Figure 6 As shown, the battery device 100 also includes: a protective structure 30, a plurality of box bottom wall portions 102 including: a first box bottom wall portion 1021 and a second box bottom wall portion 1022, the first box bottom wall portion 1021 is configured as a heat exchange wall portion 103, and the protective structure 30 is disposed below the first box bottom wall portion 1021 and fixedly connected to the second box bottom wall portion 1022.

[0115] The plurality of box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022. The number of the first box bottom wall portion 1021 may be one, or the number of the first box bottom wall portion 1021 may be multiple, and the number of the second box bottom wall portion 1022 may be one, or the number of the second box bottom wall portion 1022 may be multiple. The first box bottom wall portion 1021 is configured as a heat exchange wall portion 103.

[0116] When the number of the first box bottom wall 1021 is one, the number of the protective structure 30 can be one and correspond to the first box bottom wall 1021. When the number of the first box bottom wall 1021 is multiple, if the multiple first box bottom walls 1021 are arranged adjacent to each other, the number of the protective structure 30 can be one and correspond to the multiple first box bottom walls 1021 at the same time. If the multiple first box bottom walls 1021 are arranged spaced apart, the number of the protective structure 30 can be multiple and correspond to the multiple first box bottom walls 1021 one by one. Figure 3 In the Z direction shown in FIG. 1 ), the protective structure 30 is disposed below the first box bottom wall 1021. By providing the protective structure 30, the strength of the first box bottom wall 1021 can be reinforced to improve the overall structural strength of the battery device 100, and the heat exchange wall 103 can be protected by the protective device to reduce the risk of damage to the heat exchange wall 103 due to impact or collision, thereby improving the safety of use.

[0117] The protective structure 30 is fixedly connected to the second box bottom wall 1022. As some embodiments of the present application, the protective structure 30 and the second box bottom wall 1022 can be connected by, but not limited to, welding, bolting, clamping, bonding, etc., so that the protective structure 30 and the second box bottom wall 1022 form a unified whole, greatly improving the impact resistance of the box bottom wall 101, which is conducive to improving the side column collision resistance and bottom ball resistance of the battery device 100. As some embodiments of the present application, the protective structure 30 is welded to the second box bottom wall 1022. The welded connection not only has reliable connection strength, but also does not require bolt locking, has high reliability in use and high manufacturing efficiency.

[0118] As some embodiments of the present application, the protective structure 30 may be constructed as, but not limited to, a plastic structure, a metal structure, a carbon fiber structure, etc.

[0119] In the above technical solution, by arranging the protective structure 30 below the first box bottom wall 1021, the strength of the first box bottom wall 1021 can be reinforced to improve the overall structural strength of the battery device 100, and the heat exchange wall 103 can be protected by the protective device to reduce the risk of damage to the heat exchange wall 103 due to impact and collision, thereby improving the safety of use. By fixing the protective structure 30 to the second box bottom wall 1022, the protective structure 30 and the second box bottom wall 1022 can form a unified whole, greatly improving the impact resistance of the box bottom wall 101, which is conducive to improving the battery device 100's ability to resist side column collision and bottom ball.

[0120] In some embodiments of the present application, Figure 6 As shown, the protection structure 30 is spaced apart from the corresponding first box bottom wall portion 1021 to form a buffer space 31 between the protection structure 30 and the corresponding first box bottom wall portion 1021 .

[0121] Along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the protective structure 30 is arranged below the corresponding first box bottom wall portion 1021 and is spaced apart from the corresponding first box bottom wall portion 1021, so that a buffer space 31 can be formed between the protective structure 30 and the corresponding first box bottom wall portion 1021. The buffer space 31 can play a role in collapse energy absorption to further reduce the risk of damage to the heat exchange wall portion 103 due to impact or collision, thereby improving safety in use.

[0122] In the above technical solution, by separating the protective structure 30 from the corresponding first box bottom wall portion 1021, a buffer space 31 can be formed between the protective structure 30 and the corresponding first box bottom wall portion 1021. When the protective structure 30 is impacted, the buffer space 31 can play a role in collapse and energy absorption, so as to reduce the risk of damage to the heat exchange wall portion 103, thereby improving safety of use.

[0123] In some embodiments of the present application, the battery device 100 further includes: an energy absorbing structure, which is disposed in the buffer space 31 .

[0124] The material of the energy absorbing structure may include but is not limited to foam, rubber, resin, etc. The energy absorbing structure may be disposed in a buffer space 31 formed by spacing the protective structure 30 from the corresponding first box bottom wall 1021. The energy absorbing structure may be bonded to the protective structure 30 and / or the first box bottom wall 1021, or the energy absorbing structure may be sandwiched between the protective structure 30 and the corresponding first box bottom wall 1021. The energy absorbing structure can absorb impact force to reduce the intensity of the impact force transmitted to the first box bottom wall 1021, so as to protect the first box bottom wall 1021, effectively reduce the risk of damage to the first box bottom wall 1021 due to impact and collision, and improve safety in use.

[0125] In the above technical solution, by arranging the energy absorbing structure in the buffer space 31, when the protective structure 30 is hit, the impact force can be absorbed by the energy absorbing structure, thereby effectively reducing the intensity of the impact force transmitted to the bottom wall portion 1021 of the first box body, and reducing the risk of damage to the bottom wall portion 1021 of the first box body due to excessive impact force, thereby effectively improving the safety of the battery device 100.

[0126] In some embodiments of the present application, Figure 6 As shown, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the outer surface of the first box bottom wall portion 1021 is higher than the outer surface of the second box bottom wall portion 1022, and the outer surface of the protective structure 30 is flush with the outer surface of the second box bottom wall portion 1022.

[0127] The outer surface of the first box bottom wall 1021 being higher than the outer surface of the second box bottom wall 1022 can be understood as follows: Figure 3 In the Z direction shown in the figure), the lower surface of the first box bottom wall portion 1021 is higher than the lower surface of the second box bottom wall portion 1022, or it can be understood that the surface of the first box bottom wall portion 1021 away from the accommodating space 104 is higher than the surface of the second box bottom wall portion 1022 away from the accommodating space 104.

[0128] Furthermore, the outer surface of the protective structure 30 is flush with the outer surface of the second box bottom wall portion 1022. The flushness of the outer surface of the protective structure 30 with the outer surface of the second box bottom wall portion 1022 can be understood as that the outer surface of the protective structure 30 is flush with the outer surface of the second box bottom wall portion 1022 along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure, the lower surface of the protective structure 30 is flush with the lower surface of the second box bottom wall 1022, or it can be understood that the surface of the protective structure 30 away from the accommodating space 104 is flush with the surface of the second box bottom wall 1022 away from the accommodating space 104.

[0129] By making the outer surface of the first box bottom wall 1021 higher than the outer surface of the second box bottom wall 1022, an installation space can be provided for the protective structure 30, so that the protective structure 30 can be installed in the space defined by the first box bottom wall 1021 and the second box bottom wall 1022. By making the outer surface of the protective structure 30 flush with the outer surface of the second box bottom wall 1022, the probability of the protective structure 30 and the second box bottom wall 1022 forming a step shape and colliding with protruding stones, shoulders, etc. can be reduced. In addition, it is also convenient to set other protective parts or coatings on the outer surfaces of the protective structure 30 and the second box bottom wall 1022.

[0130] In the above technical solution, by making the outer surface of the first box bottom wall portion 1021 higher than the outer surface of the second box bottom wall portion 1022, an installation space can be provided for the protective structure 30. By making the outer surface of the protective structure 30 flush with the outer surface of the second box bottom wall portion 1022, the probability of the protective structure 30 and the second box bottom wall portion 1022 forming a step shape and colliding with protruding stones, shoulders, etc. can be reduced, which is beneficial to improving the reliability of the battery device 100. In addition, it is also convenient to set other protective parts or coatings on the outer surfaces of the protective structure 30 and the second box bottom wall portion 1022 to reduce the manufacturing difficulty of the battery device 100.

[0131] In some embodiments of the present application, Figure 6 As shown, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), a protective layer 32 is provided on the outer surface of the protective structure 30 and / or the outer surface of the second box bottom wall portion 1022.

[0132] Among them, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the outer surface of the protective structure 30 is provided with a protective layer 32, or along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in FIG. 1 ), the outer surface of the second box bottom wall portion 1022 is provided with a protective layer 32, or along the height direction of the battery device 100 (i.e. Figure 3 (Z direction as shown), the outer surface of the protective structure 30 and the outer surface of the second box bottom wall portion 1022 are both provided with a protective layer 32.

[0133] As some embodiments of the present application, the function of the protective layer 32 can be selected according to actual needs. For example, a bottom ball energy absorption coating or a stone impact resistance coating can be provided on the outer surface of the protective structure 30 and / or the outer surface of the second box bottom wall 1022. By providing the protective layer 32 on the outer surface of the protective structure 30 and / or the outer surface of the second box bottom wall 1022, the impact resistance of the battery device 100 can be improved, and the protective layer 32 is light in weight, which is conducive to the lightweight design of the battery device 100 compared with the provision of a protective plate structure.

[0134] In the above technical solution, by providing a protective layer 32 on the outer surface of the protective structure 30 and / or the outer surface of the second box bottom wall portion 1022, the impact resistance of the battery device 100 can be improved, which is beneficial to improving the reliability of the battery device 100. In addition, compared with providing a protective plate structure, the protective layer 32 is lighter in weight, which is beneficial to the lightweight design of the battery device 100. When the battery device 100 is applied to a vehicle, the driving range of the vehicle can be improved.

[0135] In some embodiments of the present application, Figure 3-Figure 6 As shown, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the second box bottom wall portion 1022 is arranged corresponding to the battery cell 20 to support the battery cell 20, and the first box bottom wall portion 1021 is arranged staggered with the battery cell 20.

[0136] Among them, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in FIG. 1 ), the orthographic projection of the second box bottom wall 1022 coincides with the orthographic projection of the battery cell 20, and the orthographic projection of the first box bottom wall 1021 does not have an overlapping area with the orthographic projection of the battery cell 20. In other words, the second box bottom wall 1022 is located below the battery cell 20 to support the battery cell 20, and the first box bottom wall 1021 is located below the fitting 35 to support the fitting 35 and perform heat exchange with the fitting 35 to adjust the temperature of the fitting 35.

[0137] As some embodiments of the present application, a partition plate 105 may be provided in the accommodating space 104, and the partition plate 105 is connected to the bottom wall 101 of the box body and separates the battery cell 20 from the fitting 35, so as to perform a partition design for the battery device 100. For example, the battery device 100 is divided into an energy zone (an area for accommodating the battery cell 20) and a functional zone (an area for accommodating the fitting 35), so as to facilitate the assembly and maintenance of the battery device 100. Moreover, the risk of the fitting 35 and the battery cell 20 contacting and interfering with each other can be reduced, thereby improving the reliability of the battery device 100.

[0138] In the above technical solution, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), by arranging the second box bottom wall portion 1022 corresponding to the battery cell 20 to support the battery cell 20, and staggering the first box bottom wall portion 1021 and the battery cell 20, the battery device 100 can be partitioned to facilitate the assembly and maintenance of the battery device 100, and the risk of the fitting 35 and the battery cell 20 contacting and interfering with each other can be reduced, thereby improving the reliability of the battery device 100.

[0139] In some embodiments of the present application, Figure 6 As shown, the battery device 100 further includes: an adapter 33 , and the adapter 33 is connected between at least two adjacent box bottom wall portions 102 .

[0140] The box bottom wall 101 includes a plurality of box bottom wall portions 102, any two adjacent box bottom wall portions 102 are fixedly connected, and at least two adjacent box bottom wall portions 102 are connected with an adapter 33, for example, some adjacent two box bottom wall portions 102 are connected with an adapter 33, or all adjacent two box bottom wall portions 102 are connected with an adapter 33. As some embodiments of the present application, the adapter 33 and the two adjacent box bottom wall portions 102 can be connected by, but not limited to, welding, clamping, bolting, etc. By providing the adapter 33, the two adjacent box bottom wall portions 102 can be connected as a whole to improve the structural strength and impact resistance of the two adjacent box bottom wall portions 102.

[0141] As some embodiments of the present application, along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), an adapter 33 is connected between two adjacent box bottom walls 102 whose inner surface heights are not flush, so that the two adjacent box bottom walls 102 whose inner surface heights are not flush can be connected as a whole. As some embodiments of the present application, an adapter 33 is connected between two adjacent box bottom walls 102 of different materials, so that the two adjacent box bottom walls 102 of different materials can be connected as a whole.

[0142] As some embodiments of the present application, multiple box bottom wall portions 102 include: a first box bottom wall portion 1021 and a second box bottom wall portion 1022, the number of the first box bottom wall portion 1021 and the second box bottom wall portion 1022 are both one, the first box bottom wall portion 1021 and the second box bottom wall portion 1022 are both welded to the frame of the box 10, an adapter 33 is connected between the first box bottom wall portion 1021 and the second box bottom wall portion 1022, and the materials of the first box bottom wall portion 1021 and the second box bottom wall portion 1022 are inconsistent. It should be explained that due to the inconsistency of the materials of the first box bottom wall portion 1021 and the second box bottom wall portion 1022, the first box bottom wall portion 1021 and the second box bottom wall portion 1022 may not be able to be directly welded together. By setting the adapter 33, the first box bottom wall portion 1021 and the second box bottom wall portion 1022 with different materials can be welded together as a whole.

[0143] As some embodiments of the present application, the second box bottom wall portion 1022 can use a lightweight alloy, such as but not limited to magnesium alloy, aluminum-magnesium alloy, etc., the first box bottom wall portion 1021 can use an alloy with good formability and good compatibility with water-cooling liquid, such as a third-series aluminum alloy, and the adapter 33 can use a fifth-series aluminum alloy or a sixth-series aluminum alloy to weld the first box bottom wall portion 1021 and the second box bottom wall portion 1022 into a whole.

[0144] The inner surface heights of the first box bottom wall portion 1021 and the second box bottom wall portion 1022 are not flush. It needs to be explained that since the inner surface heights of the first box bottom wall portion 1021 and the second box bottom wall portion 1022 are not flush, the first box bottom wall portion 1021 and the second box bottom wall portion 1022 may not be able to be directly welded and connected. By providing an adapter 33, the first box bottom wall portion 1021 and the second box bottom wall portion 1022 with uneven inner surface heights can be welded and connected as a whole.

[0145] In the above technical solution, by providing the adapter 33, two adjacent box bottom wall portions 102 with uneven inner surface heights can be connected as a whole, and two adjacent box bottom wall portions 102 with different materials can be connected as a whole, thereby effectively improving the structural strength and impact resistance of the box bottom wall 101, which is beneficial to improving the reliability of the battery device 100.

[0146] In some embodiments of the present application, the matching component 35 is configured as a battery cell 20 , or the matching component 35 is configured as a distribution box 36 connected to the battery cell 20 .

[0147] As some embodiments of the present application, the fitting 35 is configured as a battery cell 20, and the fitting 35 can be arranged on the bottom wall portion 102 of the box body configured as a heat exchange wall portion 103, so as to perform heat exchange with the fitting 35 through the heat exchange wall portion 103 to adjust the temperature of the fitting 35 (i.e., the battery cell 20). As some embodiments of the present application, the fitting 35 is configured as a distribution box 36 connected to the battery cell 20, and the distribution box 36 can be arranged on the bottom wall portion 102 of the box body configured as a heat exchange wall portion 103, so as to perform heat exchange with the distribution box 36 through the heat exchange wall portion 103 to adjust the temperature of the distribution box 36.

[0148] In the above technical solution, by constructing the fitting 35 as a battery cell 20 or a distribution box 36 connected to the battery cell 20, the temperature of the battery cell 20 or the distribution box 36 connected to the battery cell 20 can be adjusted through the heat exchange wall 103, so that the battery cell 20 or the distribution box 36 connected to the battery cell 20 can work in an appropriate temperature range for a long time.

[0149] In some embodiments of the present application, Figure 6As shown, the second box bottom wall portion 1022 includes two flat plate structures 10231 and a plurality of reinforcing plates 10232 . The two flat plate structures 10231 are arranged at intervals, and the plurality of reinforcing plates 10232 are connected between the two flat plate structures 10231 .

[0150] The second box bottom wall 1022 can be constructed as a profile plate 1023, such as Figure 6 As shown, the profile plate 1023 may include two Figure 3 There are flat plate structures 10231 spaced apart from each other (in the Z direction as shown), and a plurality of reinforcing plates 10232 connected between the two flat plate structures 10231.

[0151] In the above technical solution, by making the second box bottom wall portion 1022 include two flat structures 10231 and multiple reinforcing plates 10232, and making the multiple reinforcing plates 10232 connected between the two flat structures 10231, it is beneficial to improve the side column collision resistance of the battery device 100 and to improve the bottom ball resistance of the battery device 100.

[0152] According to some embodiments of the present application, the present application further provides an electric device 200 , and the electric device 200 includes the battery device 100 in the above embodiment. The battery device 100 is used to provide electric energy for the electric device 200 .

[0153] According to some embodiments of the present application, see Figure 3-Figure 6 As shown, the present application provides a battery device 100 , which includes: a box body 10 , a battery cell 20 , a protective structure 30 , an energy absorbing structure, and an adapter 33 .

[0154] Among them, the battery cell 20 is arranged in the box body 10, and the box body 10 has a box body bottom wall 101, and the box body bottom wall 101 includes multiple box body bottom wall portions 102, and the multiple box body bottom wall portions 102 include: a first box body bottom wall portion 1021 and a second box body bottom wall portion 1022, the second box body bottom wall portion 1022 is located below the battery cell 20 to support the battery cell 20, and the first box body bottom wall portion 1021 is constructed as a heat exchange wall portion 103, and the heat exchange wall portion 103 is used to exchange heat with the mating part 35.

[0155] In this way, the height direction (i.e. Figure 3 The space in the Z direction as shown in the figure can improve the space utilization rate, and can reduce the weight of the battery device 100, which is beneficial to the lightweight design of the battery device 100.

[0156] Along the height direction of the battery device 100 (i.e. Figure 3In the Z direction shown in the figure), the inner surface of the first box bottom wall 1021 is lower than the inner surface of the second box bottom wall 1022, so that more space can be reserved for the fitting 35, which is convenient for the arrangement of the fitting 35 and the connection of the fitting 35 with other parts. The protective structure 30 is arranged below the first box bottom wall 1021 and is fixedly connected to the second box bottom wall 1022, so that the strength of the first box bottom wall 1021 can be reinforced to improve the overall structural strength of the battery device 100. The protective structure 30 is spaced apart from the first box bottom wall 1021 to form a buffer space 31 between the protective structure 30 and the corresponding first box bottom wall 1021. When the protective structure 30 is impacted, the buffer space 31 can play a role in collapsing and absorbing energy to reduce the risk of damage to the heat exchange wall 103, thereby improving the safety of use. The energy absorbing structure is disposed in the buffer space 31 , and can absorb impact force, thereby effectively reducing the intensity of the impact force transmitted to the first box bottom wall portion 1021 , and reducing the risk of the first box bottom wall portion 1021 being damaged due to excessive impact force.

[0157] Along the height direction of the battery device 100 (i.e. Figure 3 The outer surface of the first box bottom wall 1021 is higher than the outer surface of the second box bottom wall 1022, so that installation space can be provided for the protection structure 30. The outer surface of the protection structure 30 is flush with the outer surface of the second box bottom wall 1022, which can reduce the probability of the protection structure 30 and the second box bottom wall 1022 forming a step shape and colliding with protruding stones, shoulders, etc., which is conducive to improving the reliability of the battery device 100.

[0158] Along the height direction of the battery device 100 (i.e. Figure 3 In the Z direction shown in the figure), the outer surface of the protective structure 30 and the outer surface of the second box bottom wall portion 1022 are both provided with a protective layer 32, which can improve the impact resistance of the battery device 100 and is beneficial to improving the reliability of the battery device 100. In addition, compared with setting a protective plate structure, the protective layer 32 is lighter in weight, which is beneficial to the lightweight design of the battery device 100.

[0159] Along the height direction of the battery device 100 (i.e. Figure 3The second box bottom wall 1022 is arranged in correspondence with the battery cell 20 to support the battery cell 20, and the first box bottom wall 1021 is arranged staggered with the battery cell 20, so that the battery device 100 can be designed in a partitioned manner to facilitate the assembly and maintenance of the battery device 100. An adapter 33 is connected between the first box bottom wall 1021 and the second box bottom wall 1022. The second box bottom wall 1022 is made of magnesium alloy, the first box bottom wall 1021 is made of three-series aluminum alloy, and the adapter 33 is made of five-series aluminum alloy or six-series aluminum alloy. In this way, the first box bottom wall 1021 and the second box bottom wall 1022, which have uneven inner surfaces and different materials, can be connected as a whole, which can effectively improve the structural strength and impact resistance of the box bottom wall 101, which is conducive to improving the reliability of the battery device 100.

[0160] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0161] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0162] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: A box body and a battery cell, the battery cell is arranged in the box body, the box body has a box body bottom wall, along the height direction of the battery device, the box body bottom wall is located below the battery cell to support the battery cell, the box body bottom wall includes a plurality of box body bottom wall portions, the plurality of box body bottom wall portions are arranged along a plane perpendicular to the height direction of the battery device, and two adjacent box body bottom wall portions are fixedly connected, and some of the plurality of box body bottom wall portions are configured as heat exchange wall portions, and the heat exchange wall portions are used to exchange heat with a matching component.

2. The battery device according to claim 1, characterized in that: The multiple box bottom wall portions include: a first box bottom wall portion and a second box bottom wall portion, the first box bottom wall portion is configured as the heat exchange wall portion, and along the height direction of the battery device, the inner surface of the first box bottom wall portion is flush with the inner surface of the second box bottom wall portion.

3. The battery device according to claim 1, characterized in that: The multiple box bottom wall portions include: a first box bottom wall portion and a second box bottom wall portion, the first box bottom wall portion is configured as the heat exchange wall portion, and along the height direction of the battery device, the inner surface of the first box bottom wall portion is lower than the inner surface of the second box bottom wall portion.

4. The battery device according to claim 1, characterized in that: The multiple box bottom wall portions include: a first box bottom wall portion and a second box bottom wall portion, the first box bottom wall portion is configured as the heat exchange wall portion, and along the height direction of the battery device, the inner surface of the first box bottom wall portion is higher than the inner surface of the second box bottom wall portion.

5. The battery device according to claim 1, characterized in that: Also includes: The protective structure comprises a plurality of bottom walls of the box body including a first bottom wall of the box body and a second bottom wall of the box body, wherein the first bottom wall of the box body is configured as the heat exchange wall, and the protective structure is arranged below the first bottom wall of the box body and fixedly connected to the second bottom wall of the box body.

6. The battery device according to claim 5, characterized in that: The protection structure is spaced apart from the corresponding bottom wall portion of the first box body to form a buffer space between the protection structure and the corresponding bottom wall portion of the first box body.

7. The battery device according to claim 6, characterized in that: Also includes: An energy absorbing structure is arranged in the buffer space.

8. The battery device according to claim 6, characterized in that: Along the height direction of the battery device, the outer surface of the first box bottom wall is higher than the outer surface of the second box bottom wall, and the outer surface of the protective structure is flush with the outer surface of the second box bottom wall.

9. The battery device according to claim 5, characterized in that: Along the height direction of the battery device, an outer surface of the protective structure and / or an outer surface of the bottom wall of the second box body is provided with a protective layer.

10. The battery device according to any one of claims 2 to 9, characterized in that: Along the height direction of the battery device, the second box bottom wall portion is arranged corresponding to the battery cell to support the battery cell, and the first box bottom wall portion is arranged staggered with the battery cell.

11. The battery device according to any one of claims 1 to 9, characterized in that: Also includes: The adapter is connected between at least two adjacent bottom wall portions of the box body.

12. The battery device according to any one of claims 1 to 9, characterized in that: The matching piece is configured as the battery cell, or the matching piece is configured as a distribution box connected to the battery cell.

13. The battery device according to any one of claims 2 to 9, characterized in that: The bottom wall of the second box body includes two flat plate structures and a plurality of reinforcing plates. The two flat plate structures are arranged at intervals, and the plurality of reinforcing plates are connected between the two flat plate structures.

14. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-13.

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