Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment. The battery device comprises a box body, a first expansion beam, a first battery monomer and a first electric part, the first expansion beam is arranged in the box body and divides the space in the box body into a first battery bin and a first electrical bin; the first battery monomer is arranged in the first battery bin and is matched with the first expansion beam; the first electrical part is arranged in the first electrical cabin and is electrically connected with the first battery monomer; wherein the first expansion beam comprises a first beam and a second beam which are connected in an included angle mode, a first installation space is formed between the first beam and the second beam, the first installation space is located in the first electrical bin, and at least part of the first electrical part is installed on the first expansion beam and contained in the first installation space. According to the technical scheme provided by the invention, the energy density of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery devices, and more particularly, to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their energy-saving and environmental protection advantages. For electric vehicles, battery technology is an important factor related to their development.

[0003] During the manufacturing process of battery devices, the energy density of battery devices is an issue that cannot be ignored. Therefore, how to improve the energy density of batteries is an urgent technical problem in battery technology. Summary of the Utility Model

[0004] The present application provides a battery device and an electrical device, which can improve the energy density of the battery device.

[0005] The present application is implemented by the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery device, which includes a box body, a first expansion beam, a first battery cell, and a first electrical component. The first expansion beam is disposed in the box body and divides the space in the box body into a first battery compartment and a first electrical compartment; the first battery cell is disposed in the first battery compartment and cooperates with the first expansion beam; the first electrical component is disposed in the first electrical compartment and is electrically connected to the first battery cell; wherein, the first expansion beam includes a first beam and a second beam connected at an angle, and a first installation space is formed between the first beam and the second beam. The first installation space is located in the first electrical compartment, and at least part of the first electrical component is installed on the first expansion beam and accommodated in the first installation space.

[0007] According to the battery device of the embodiment of the present application, the first beam and the second beam are disposed at an angle, which can enhance the overall strength of the first expansion beam to facilitate restraining the expansion deformation of the first battery cell; at least part of the first electrical component is installed in the first installation space formed by the first beam and the second beam, improving the utilization rate of the first installation space, making the internal structure of the box body installed compactly, improving the utilization rate of the internal space of the box body, and enabling the battery device to have a high energy density.

[0008] According to some embodiments of the present application, the box body includes a bottom wall, the bottom wall bears the first battery cell, the first beam cooperates with the first battery cell, and the first beam and / or the second beam are connected to the bottom wall.

[0009] In the above solution, the first beam and / or the second beam are connected to the bottom wall to facilitate the assembly and positioning of the first expansion beam and to facilitate restraining the expansion deformation of the first battery cell through the first expansion beam.

[0010] According to some embodiments of the present application, the battery device further includes a high-voltage box disposed in the first electrical compartment. The high-voltage box is electrically connected to the first battery cell. Along the first direction, the high-voltage box, the first expansion beam, and the first battery cell are arranged in sequence, and the first direction is perpendicular to the thickness direction of the bottom wall.

[0011] In the above solution, the high-voltage box, the first expansion beam, and the first battery cell are arranged in sequence to facilitate the utilization of the space in the first direction within the box, making the structure of the battery device compact.

[0012] According to some embodiments of the present application, the first electrical component includes a first battery monitoring unit and a first battery management unit; the first battery monitoring unit is installed on either the first beam or the second beam, and the first battery management unit is installed on either the first beam or the second beam.

[0013] In the above solution, the first battery monitoring unit is used to monitor battery state information such as the voltage and temperature of the first battery cell. The first battery monitoring unit is installed on the first beam or the second beam to facilitate the assembly and positioning of the first battery monitoring unit; the first battery management unit is used to monitor, control, and protect the first battery cell in real time. The first battery management unit is installed on the first beam or the second beam to facilitate the assembly and positioning of the first battery management unit.

[0014] According to some embodiments of the present application, the first battery monitoring unit is installed on the first beam, and the large surface of the first battery monitoring unit is arranged to fit the wall surface of the first beam that forms the first installation space; the first battery management unit is installed on the second beam and is spaced apart from the first battery monitoring unit.

[0015] In the above solution, the first beam cooperates with the first battery cell. The large surface of the first battery monitoring unit is arranged to fit the wall surface of the first beam that forms the first installation space. The first battery monitoring unit has a large connection area with the first beam, which can improve the connection stability between the first battery monitoring unit and the first beam. Moreover, the distance between the first battery monitoring unit and the first battery cell is short, making the connection line between the first battery monitoring unit and the first battery cell short. The first battery management unit is installed on the second beam and is spaced apart from the first battery monitoring unit, which is convenient for improving the utilization rate of the first installation space and reducing the interference risk between the first battery management unit and the first battery monitoring unit.

[0016] According to some embodiments of the present application, a first flow channel is formed inside the bottom wall, and the first flow channel is used to accommodate a heat exchange medium; the positions where the bottom wall is connected to the first beam and / or the second beam are avoided from the first flow channel.

[0017] In the above solution, the heat exchange medium is accommodated in the first flow channel, and the temperature of the first battery cell can be adjusted by using the heat exchange medium, thereby improving the cycling performance of the first battery cell. The positions where the bottom wall is connected to the first beam and / or the second beam avoid the first flow channel, which can reduce the damage to the first flow channel and improve the connection reliability between the bottom wall and the first beam and / or the second beam.

[0018] According to some embodiments of the present application, the battery device further includes a first liquid inlet joint and a first liquid outlet joint. Both the first liquid inlet joint and the first liquid outlet joint are connected to the bottom wall, and the first liquid inlet joint and the first liquid outlet joint are respectively communicated with the first flow channel; along a second direction, the first electrical component is located between the first liquid inlet joint and the first liquid outlet joint, and the second direction is perpendicular to the thickness direction of the bottom wall.

[0019] In the above solution, the first liquid inlet joint and the first liquid outlet joint are respectively communicated with the first flow channel, which facilitates connecting the first liquid inlet joint to the pipeline for inputting the heat exchange medium to transport the heat exchange medium to the first flow channel, and facilitates connecting the first liquid outlet joint to the pipeline for outputting the heat exchange medium to discharge the heat exchange medium in the first flow channel. The first electrical component is located between the first liquid inlet joint and the first liquid outlet joint, making the structures of the first liquid inlet joint, the first electrical component, and the first liquid outlet joint compact, improving the space utilization rate inside the box body in the second direction, so as to improve the energy density of the battery device.

[0020] According to some embodiments of the present application, the battery device further includes a first liquid inlet pipe, a first liquid outlet pipe, and a high-voltage box. The first liquid inlet pipe is connected to the first liquid inlet joint; the first liquid outlet pipe is connected to the first liquid outlet joint; the high-voltage box is disposed inside the box body and on the bottom wall, and the high-voltage box is electrically connected to the first battery cell. Along the second direction, the high-voltage box is located between the first liquid inlet pipe and the first liquid outlet pipe.

[0021] In the above solution, the high-voltage box is located between the first liquid inlet pipe and the first liquid outlet pipe, which facilitates the utilization of the space inside the box body in the second direction and improves the space utilization rate inside the box body.

[0022] According to some embodiments of the present application, the first beam has a first wall surface facing away from the first battery cell, and the second beam has a second wall surface facing away from the bottom wall. The first wall surface and the second wall surface enclose a first installation space, and the angle between the first wall surface and the second wall surface is an obtuse angle.

[0023] In the above solution, the angle between the first wall surface and the second wall surface is an obtuse angle, and the first installation space can have a relatively large volume, so as to facilitate accommodating the first electrical component and improve the space utilization rate inside the box body.

[0024] According to some embodiments of the present application, cavities are formed inside both the first beam and the second beam.

[0025] In the above solution, cavities are formed inside the first beam and the second beam, which can reduce the weight of the first beam and the second beam, and at the same time, it is easy to absorb the force of the first battery cell and restrict the expansion deformation of the first battery cell.

[0026] According to some embodiments of the present application, the battery device also includes a second battery cell and a bracket, the second battery cell is arranged in the box body and arranged along a third direction with the first battery cell; the bracket is arranged between the first battery cell and the second battery cell, and the bracket supports the second battery cell; the box body includes a bottom wall, the bottom wall supports the first battery cell, and the third direction is parallel to the thickness direction of the bottom wall.

[0027] In the above solution, the bracket separates the first battery cell and the second battery cell, and the bracket carries the second battery cell to facilitate assembly and positioning of the second battery cell.

[0028] According to some embodiments of the present application, the battery device also includes a second expansion beam and a second electrical component. The second expansion beam is arranged on the bracket, and divides the space of the box body located on the side of the bracket away from the first battery cell into a second battery compartment and a second electrical compartment. The second battery cell is arranged in the second battery compartment and cooperates with the second expansion beam; the second electrical component is arranged in the second electrical compartment and is electrically connected to the second battery cell; wherein the second expansion beam includes a third beam and a fourth beam connected at an angle, and a second installation space is formed between the third beam and the fourth beam, and the second installation space is located in the second electrical compartment, and at least part of the second electrical component is installed on the second expansion beam and accommodated in the second installation space.

[0029] In the above scheme, the third beam and the fourth beam are arranged at an angle, which can enhance the overall strength of the second expansion beam so as to restrain the expansion and deformation of the second battery cell; at least part of the second electrical component is installed in the second installation space formed by the third beam and the fourth beam, and the second installation space is utilized to make the structure inside the box body compactly installed, thereby improving the space utilization inside the box body and making the battery device have a higher energy density.

[0030] According to some embodiments of the present application, the bracket has a first end portion, and along a first direction, the first end portion exceeds the first battery cell and the second battery cell, and the first direction is perpendicular to a third direction; along the third direction, the second expansion beam and the first expansion beam are located on both sides of the first end portion.

[0031] In the above scheme, the first end exceeds the first battery cell and the second battery cell, and the second expansion beam and the first expansion beam are located on both sides of the first end in the third direction, which facilitates the layout of the first electrical component and the second electrical component and improves the space utilization of the bracket on both sides in the third direction.

[0032] According to some embodiments of the present application, the box body includes a bottom wall, the bottom wall bears the first battery cell, the first battery compartment and the first electrical compartment are distributed in sequence along a first direction, and the first direction is perpendicular to the thickness direction of the bottom wall; along the direction from the first battery compartment to the first electrical compartment, the bottom wall extends beyond the bracket, the first electrical compartment communicates with the second electrical compartment, and the third direction is parallel to the thickness direction of the bottom wall.

[0033] In the above solution, the first electrical compartment communicates with the second electrical compartment, which is convenient for arranging other components in the space where the bottom wall extends beyond the bracket, so as to improve the space utilization rate inside the box body.

[0034] According to some embodiments of the present application, the battery device further includes a high-voltage box, the high-voltage box is arranged on the bottom wall, and the high-voltage box is arranged in the first electrical compartment and the second electrical compartment.

[0035] In the above solution, the high-voltage box is arranged in the first electrical compartment and the second electrical compartment, which can improve the utilization rate of the space where the bottom wall extends beyond the bracket and make the component structure inside the box body compact.

[0036] According to some embodiments of the present application, the third beam cooperates with the second battery cell, and the third beam and / or the fourth beam are connected to the bracket; the second electrical component includes a second battery monitoring unit and a second battery management unit, and the second battery monitoring unit is installed on either the third beam or the fourth beam, and the second battery management unit is installed on either the third beam or the fourth beam.

[0037] In the above solution, the third beam and / or the fourth beam are connected to the bracket to facilitate the assembly and positioning of the second expansion beam, and to facilitate restricting the expansion and deformation of the second battery cell through the second expansion beam. The second battery monitoring unit is used to monitor battery state information such as the voltage and temperature of the second battery cell. The second battery monitoring unit is installed on the third beam or the fourth beam to facilitate the assembly and positioning of the second battery monitoring unit; the second battery management unit is used to monitor, control and protect the second battery cell in real time. The second battery management unit is installed on the third beam or the fourth beam to facilitate the assembly and positioning of the second battery management unit.

[0038] According to some embodiments of the present application, the second battery monitoring unit is installed on the third beam, and the large surface of the second battery monitoring unit fits against the third beam to form the wall surface of the second installation space; the second battery management unit is installed on the fourth beam and is spaced apart from the second battery monitoring unit.

[0039] In the above scheme, the third beam cooperates with the second battery cell, the large surface of the second battery monitoring unit is arranged in contact with the wall of the third beam to form the second installation space, the second battery monitoring unit and the third beam have a large connection area, which can improve the connection stability between the second battery monitoring unit and the third beam, and the distance between the second battery monitoring unit and the second battery cell is short, so that the connection line between the second battery monitoring unit and the second battery cell is short. The second battery management unit is installed on the fourth beam and is spaced apart from the second battery monitoring unit, which is convenient for improving the utilization rate of the second installation space and reducing the risk of interference between the second battery management unit and the second battery monitoring unit.

[0040] According to some embodiments of the present application, the third beam cooperates with the second battery cell, and the third beam and / or the fourth beam are connected to the bracket; the third beam has a third wall facing away from the second battery cell, and the fourth beam has a fourth wall facing away from the bracket, the third wall and the fourth wall form a second installation space, and the angle between the third wall and the fourth wall is an obtuse angle.

[0041] In the above solution, the third beam and / or the fourth beam are connected to the bracket to facilitate the assembly and positioning of the second expansion beam, so as to facilitate the second expansion beam to constrain the expansion and deformation of the second battery cell. The angle between the third wall and the fourth wall is an obtuse angle, and the second installation space can have a larger volume to accommodate the second electrical component and improve the space utilization inside the box.

[0042] According to some embodiments of the present application, a second flow channel is formed inside the bracket, and the second flow channel is used to accommodate a heat exchange medium; the position where the bracket is connected to the third beam and / or the fourth beam avoids the second flow channel.

[0043] In the above scheme, the heat exchange medium is accommodated by the second flow channel, and the temperature of the second battery cell can be adjusted by the heat exchange medium, thereby improving the cycle performance of the second battery cell. At the same time, the bracket is located between the first battery cell and the second battery, and the heat exchange medium in the bracket can also adjust the temperature of the first battery cell. The position where the bracket is connected to the third beam and / or the fourth beam avoids the second flow channel, which can reduce damage to the second flow channel and improve the connection reliability between the bracket and the third beam and / or the fourth beam.

[0044] According to some embodiments of the present application, the battery device also includes a second liquid inlet connector and a second liquid outlet connector, both of which are connected to the bracket, and the second liquid inlet connector and the second liquid outlet connector are respectively connected to the second flow channel; the second liquid inlet connector and the second liquid outlet connector are both located in the first electrical compartment, and along the second direction, the first electrical component is located between the second liquid inlet connector and the second liquid outlet connector, and the second direction is perpendicular to the third direction.

[0045] In the above solution, the second liquid inlet joint and the second liquid outlet joint are respectively communicated with the second flow channel, which facilitates the connection with the pipeline for inputting the heat exchange medium through the second liquid inlet joint to transport the heat exchange medium to the second flow channel, and facilitates the connection with the pipeline for outputting the heat exchange medium through the second liquid outlet joint to discharge the heat exchange medium in the second flow channel. Along the third direction, the second liquid inlet joint and the second liquid outlet joint are located on the side of the bracket facing the bottom wall, and the first electrical component is located between the second liquid inlet joint and the second joint, so that the second liquid inlet joint, the first electrical component and the second liquid outlet joint are structurally compact, improving the space utilization rate inside the box body in the second direction, so as to improve the energy density of the battery device.

[0046] According to some embodiments of the present application, the battery device further includes a second liquid inlet pipe, a second liquid outlet pipe and a high-voltage box. The second liquid inlet pipe is connected to the second liquid inlet joint; the second liquid outlet pipe is connected to the second liquid outlet joint; the high-voltage box is arranged inside the box body, and the first battery cell and the second battery cell are respectively electrically connected to the high-voltage box. Along the second direction, the high-voltage box is located between the second liquid inlet pipe and the second liquid outlet pipe.

[0047] In the above solution, the second liquid inlet pipe and the second liquid outlet pipe are located in the first electrical compartment, and the high-voltage box is located between the second liquid inlet pipe and the second liquid outlet pipe, which facilitates the utilization of the space inside the box body in the second direction and improves the space utilization rate inside the box body.

[0048] According to some embodiments of the present application, cavities are formed inside both the third beam and the fourth beam.

[0049] In the above solution, cavities are formed inside both the third beam and the fourth beam, which can reduce the weight of the third beam and the fourth beam. At the same time, it is convenient to absorb the acting force of the second battery cell and restrain the expansion deformation of the second battery cell.

[0050] In a second aspect, an electrical equipment provided by an embodiment of the present application includes the battery device according to any one of the above embodiments, and the battery device is used to provide electric energy.

[0051] Some additional aspects and advantages of the present application will be given in the following description, some will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0053] Figure 1Schematic diagram of the structure of a vehicle provided by some embodiments of the present application;

[0054] Figure 2 Cross-sectional view of a battery device provided by some embodiments of the present application;

[0055] Figure 3 Cross-sectional view of a partial structure of a battery device provided by some embodiments of the present application;

[0056] Figure 4 Cross-sectional view of a battery device provided by some other embodiments of the present application;

[0057] Figure 5 Exploded view of the structure of a battery device provided by some embodiments of the present application;

[0058] Figure 6 Partial structure diagram of a battery device provided by some embodiments of the present application;

[0059] Figure 7 Cross-sectional view of a partial structure of a battery device provided by some other embodiments of the present application;

[0060] Figure 8 Partial structure diagram of a battery device provided by some other embodiments of the present application;

[0061] Figure 9 For Figure 8 Local enlarged view of part A;

[0062] Figure 10 Exploded view of the structure of a battery device provided by some other embodiments of the present application.

[0063] Icons: 100 - battery device; 10 - box body; 10a - first box body; 10b - second box body; 11 - first battery compartment; 12 - first electrical compartment; 13 - bottom wall; 131 - first flow channel; 14 - second battery compartment; 15 - second electrical compartment; 16 - first side wall; 17 - second side wall; 20 - first expansion beam; 21 - first beam; 211 - first wall surface; 22 - second beam; 221 - second wall surface; 23 - first installation space; 31 - first battery cell; 32 - second battery cell; 41 - first electrical component; 411 - first battery monitoring unit; 412 - first battery management unit; 42 - second electrical component; 421 - second battery monitoring unit; 422 - second battery management unit; 51 - third expansion beam; 52 - fourth expansion beam; 60 - high - voltage box; 71 - first liquid inlet joint; 72 - first liquid outlet joint; 73 - first liquid inlet pipe; 74 - first liquid outlet pipe; 75 - second liquid inlet joint; 76 - second liquid outlet joint; 77 - second liquid inlet pipe; 78 - second liquid outlet pipe; 791 - liquid inlet main pipe; 792 - liquid outlet main pipe; 80 - bracket; 81 - first end; 82 - second flow channel; 90 - second expansion beam; 91 - third beam; 911 - third wall surface; 92 - fourth beam; 921 - fourth wall surface; 93 - second installation space; 200 - controller; 300 - motor; 1000 - vehicle; X - first direction; Y - second direction; Z - third direction. Detailed implementation manners

[0064] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0065] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above - mentioned drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above - mentioned drawings are used to distinguish different objects, rather than to describe a specific order or primary - secondary relationship.

[0066] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0067] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] The term "and / or" in this application is merely 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 simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0069] The term "a plurality of" as used in this application means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of sheets" means two or more sheets (including two sheets).

[0070] The battery device mentioned in the embodiments of this 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, parallel, or in a hybrid connection through a busbar component.

[0071] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0072] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0073] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0078] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0079] 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.

[0080] The battery cells may be, 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 hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0081] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set 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.

[0082] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0083] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0084] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0085] As an example, the positive electrode active material can include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery can also be used.

[0086] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0087] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used.

[0088] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0089] As an example, the negative electrode active material can be a negative electrode active material for a battery well-known in the art. As an example, the negative electrode active material can include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite, and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound, and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of the battery can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0090] In some embodiments, the separator is a separator membrane. The present application has no particular limitation on the type of the separator membrane, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0091] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or can be attached to the surfaces of the positive and negative electrodes.

[0092] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0093] In some embodiments, the electrode assembly has a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0094] In some embodiments, the electrode assembly has a stacked structure.

[0095] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0096] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The housing body can be provided with one or more openings. One or more end caps can also be provided.

[0097] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through an adapter. The electrode terminal can be provided on the end cap or on the housing body.

[0098] In some embodiments, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cell.

[0099] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, the housing can protect the electrode assembly and prevent, for example, electrolyte leakage. When the housing is a non-sealed structure, the housing can protect the electrode assembly, and a sealing bag can further be included between the housing and the electrode assembly. The sealing bag is used to encapsulate components such as the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film.

[0100] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc., and there is no particular limitation in the embodiments of the present application.

[0101] The development of battery technology needs to consider multiple design factors simultaneously. For example, performance parameters such as reliability, discharge capacity, charge and discharge rate, etc. In addition, the energy density of the battery also needs to be considered.

[0102] In some embodiments, the battery device includes a box body and at least one battery cell assembly. The battery cell assembly is disposed in the box body. In order to restrain the expansion and deformation of the battery cell assembly, an expansion beam is usually disposed in the box body. In order to improve the strength of the expansion beam, the size of the expansion beam is large, and the expansion beam occupies a large space, resulting in a low space utilization rate inside the box body and a low energy density of the battery device.

[0103] In view of this, in order to solve the problem of low space utilization rate inside the box body, which results in a low energy density of the battery device, the embodiments of the present application provide a battery device, which includes a box body, a first expansion beam, a first battery cell and a first electrical component. The first expansion beam is disposed in the box body and divides the space inside the box body into a first battery compartment and a first electrical compartment; the first battery cell is disposed in the first battery compartment and cooperates with the first expansion beam; the first electrical component is disposed in the first electrical compartment and is electrically connected to the first battery cell; wherein, the first expansion beam includes a first beam and a second beam connected at an angle, and a first installation space is formed between the first beam and the second beam. The first installation space is located in the first electrical compartment, and at least part of the first electrical component is installed on the first expansion beam and accommodated in the first installation space. The first electrical component and the first expansion beam are structurally compact, the space utilization rate inside the box body is high, and the battery device has a high energy density.

[0104] In such a battery device, the first beam and the second beam are arranged at an angle, which can enhance the overall strength of the first expansion beam to facilitate restraining the expansion and deformation of the first battery cell; at least part of the first electrical component is installed in the first installation space formed by the first beam and the second beam, improving the utilization rate of the first installation space, making the internal structure of the box body installed compactly, improving the space utilization rate inside the box body, and making the battery device have a high energy density.

[0105] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in power-consuming devices such as vehicles, ships or aircraft. The power system of the power-consuming device can be composed of the battery device disclosed in the present application.

[0106] The technical solutions described in the embodiments of the present application are applicable to various electrical equipment using battery cells and battery devices, such as mobile phones, portable devices, laptops, battery cars, electric toys, power tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0107] For the convenience of description, the following embodiments take a vehicle, which is an electrical equipment in an embodiment of the present application, as an example for illustration.

[0108] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000 for the circuit system of the vehicle 1000, such as for the working power requirements during starting, navigation, and operation of the vehicle 1000.

[0109] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, such as for the working power requirements during starting, navigation, and driving of the vehicle 1000.

[0110] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to provide driving power for the vehicle 1000 instead of or partially replacing fuel or natural gas.

[0111] Please refer to Figure 2 , Figure 2 which is a cross-sectional view of a battery device provided in some embodiments of the present application. The embodiments of the present application provide a battery device 100, which includes a box body 10, a first expansion beam 20, a first battery cell 31, and a first electrical component 41. The first expansion beam 20 is disposed inside the box body 10 and divides the space inside the box body 10 into a first battery compartment 11 and a first electrical compartment 12. The first battery cell 31 is disposed in the first battery compartment 11 and cooperates with the first expansion beam 20. The first electrical component 41 is disposed in the first electrical compartment 12 and is electrically connected to the first battery cell 31. Wherein, the first expansion beam 20 includes a first beam 21 and a second beam 22 connected at an angle. A first installation space 23 is formed between the first beam 21 and the second beam 22. The first installation space 23 is located in the first electrical compartment 12. At least a part of the first electrical component 41 is installed on the first expansion beam 20 and is accommodated in the first installation space 23.

[0112] The box body 10 is used to provide an accommodation space, and the first battery cell 31 is accommodated in the accommodation space.

[0113] The first expansion beam 20 is arranged in the accommodation space of the box body 10, and divides the accommodation space into a first battery compartment 11 and a first electrical compartment 12. The first battery compartment 11 and the first electrical compartment 12 can be distributed along the first direction X. The first direction X can be parallel to the length direction of the battery device 100, or the first direction X can also be parallel to the width direction of the battery device 100.

[0114] The first battery compartment 11 is used to accommodate the first battery cell 31, and the first electrical compartment 12 is used to accommodate the electrical components of the battery device 100. The electrical components can include but are not limited to the first electrical component 41. Among them, the electrical components of the battery device 100 can include but are not limited to a battery management unit, a battery monitoring unit, a high-voltage box, etc.

[0115] The first electrical component 41 is an electrical component electrically connected to the first battery cell 31. The first electrical component 41 is used to monitor information such as the voltage, temperature or current of the first battery cell 31, and the first electrical component 41 is also used to monitor, control and protect the first battery cell 31 in real time. For example, the first electrical component 41 can include but are not limited to a first battery monitoring unit, a first battery management unit, etc.

[0116] The first expansion beam 20 is used to cooperate with the first battery cell 31 to restrict the expansion and deformation of the first battery cell 31.

[0117] In some embodiments, the battery device 100 may further include a third expansion beam 51. The third expansion beam 51 is arranged in the box body 10. The third expansion beam 51 and the first expansion beam 20 can be arranged at intervals along the first direction X. The first battery cell 31 is arranged between the third expansion beam 51 and the first expansion beam 20. The first direction X can be perpendicular to the large surface of the first battery cell 31. The large surface of the first battery cell 31 refers to the surface with a larger surface area of the first battery cell 31.

[0118] The first expansion beam 20 has a certain strength, and the material of the first expansion beam 20 can be metal, such as aluminum, aluminum alloy, steel, etc.

[0119] The first beam 21 and the second beam 22 are two components constituting the first expansion beam 20. The first beam 21 and the second beam 22 can be integrally formed. For example, the first expansion beam 20 is integrally extruded.

[0120] The angle between the first beam 21 and the second beam 22 can be an acute angle, a right angle or an obtuse angle. Optionally, the angle between the first beam 21 and the second beam 22 is greater than or equal to 90°. When ensuring that the first expansion beam 20 has relatively high overall strength, the first installation space 23 can have a relatively large volume.

[0121] There can be various installation methods for the first electrical component 41 and the first expansion beam 20. For example, threaded connection, welded connection, snap connection, etc.

[0122] When the first electrical component 41 is assembled with the first expansion beam 20, a part of the first electrical component 41 can be located within the first installation space 23, or the whole of the first electrical component 41 can be located within the first installation space 23.

[0123] In the battery device 100 according to the embodiment of the present application, the first beam 21 and the second beam 22 are arranged at an included angle, which can enhance the overall strength of the first expansion beam 20, so as to facilitate restraining the expansion deformation of the first battery cell 31; at least part of the first electrical component 41 is installed within the first installation space 23 formed by the first beam 21 and the second beam 22, improving the utilization rate of the first installation space 23, making the internal structure installation of the box body 10 compact, improving the space utilization rate inside the box body 10, and enabling the battery device 100 to have a relatively high energy density.

[0124] Please refer to Figure 2 , according to some embodiments of the present application, the box body 10 includes a bottom wall 13. The bottom wall 13 bears the first battery cell 31. The first beam 21 cooperates with the first battery cell 31, and the first beam 21 and / or the second beam 22 are connected to the bottom wall 13.

[0125] The bottom wall 13 is the wall of the box body 10 for supporting the first battery cell 31, and the first battery cell 31 is arranged on the bottom wall 13.

[0126] There are various ways for the first beam 21 to cooperate with the first battery cell 31. For example, the first beam 21 can be connected to the first battery cell 31 through a buffer pad, or the first beam 21 can be arranged in close contact with the large surface of the first battery cell 31.

[0127] In some embodiments, the first beam 21 can be connected to the bottom wall 13, or the second beam 22 can be connected to the bottom wall 13, or the first beam 21 and the second beam 22 are respectively connected to the bottom wall 13.

[0128] There can be various connection methods for the first beam 21 and / or the second beam 22 and the bottom wall 13. For example, welded connection, adhesive connection, snap connection, threaded connection, etc. In some embodiments, the first beam 21 and / or the second beam 22 are welded to the bottom wall 13, making the connection between the first beam 21 and / or the second beam 22 and the bottom wall 13 firm.

[0129] Optionally, the second beam 22 may be located at one end of the first beam 21 close to the bottom wall 13, and the second beam 22 and the first beam 21 are respectively connected to the bottom wall 13.

[0130] In the above solution, the first beam 21 and / or the second beam 22 are connected to the bottom wall 13 to facilitate the assembly and positioning of the first expansion beam 20, and to facilitate restraining the expansion deformation of the first battery cell 31 through the first expansion beam 20.

[0131] Please refer to Figure 2 , according to some embodiments of the present application, the battery device 100 further includes a high-voltage box 60. The high-voltage box 60 is disposed in the first electrical compartment 12, and the high-voltage box 60 is electrically connected to the first battery cell 31. Along the first direction X, the high-voltage box 60, the first expansion beam 20, and the first battery cell 31 are sequentially distributed, and the first direction X is perpendicular to the thickness direction of the bottom wall 13.

[0132] The high-voltage box 60 may be a device for realizing the distribution of the high-voltage electric energy of the battery cells in the battery device 100 and the overload and short-circuit protection of the high-voltage circuit.

[0133] The high-voltage box 60 is disposed in the first electrical compartment 12, and the high-voltage box 60 may be electrically connected to the first electrical component 41.

[0134] The first electrical compartment 12 and the first battery compartment 11 are distributed along the first direction X, so that the high-voltage box 60, the first expansion beam 20, and the first battery cell 31 can be sequentially distributed along the first direction X.

[0135] The first direction X is perpendicular to the thickness direction of the bottom wall 13, and the first direction X may be parallel to the length direction or the width direction of the battery device 100.

[0136] In the above solution, the high-voltage box 60, the first expansion beam 20, and the first battery cell 31 are sequentially distributed to facilitate the utilization of the space in the first direction X in the box body 10, making the structure of the battery device 100 compact.

[0137] Please refer to Figure 3 , Figure 3 is a cross-sectional view of a partial structure of a battery device provided by some embodiments of the present application. According to some embodiments of the present application, the first electrical component 41 includes a first battery monitoring unit 411 and a first battery management unit 412; the first battery monitoring unit 411 is installed on any one of the first beam 21 and the second beam 22, and the first battery management unit 412 is installed on any one of the first beam 21 and the second beam 22.

[0138] The first battery monitoring unit 411 is used to monitor battery state information such as the voltage and temperature of the first battery cell 31.

[0139] In some embodiments, the battery device 100 further includes a first sampling component. The first sampling component is electrically connected to the first battery monitoring unit 411, and is also electrically connected to the first battery cell 31, and collects voltage signals, temperature signals, current signals, etc. of the first battery cell 31.

[0140] The first battery monitoring unit 411 can be mounted on the first beam 21, or the first battery monitoring unit 411 can be mounted on the second beam 22.

[0141] The first battery management unit 412 is used for real-time monitoring, control, and protection of the first battery cell 31. The first battery monitoring unit 411 can be electrically connected to the first battery management unit 412.

[0142] The first battery management unit 412 can be mounted on the first beam 21, or the first battery management unit 412 can be mounted on the second beam 22.

[0143] In the above solution, the first battery monitoring unit 411 is mounted on the first beam 21 or the second beam 22 to facilitate the assembly and positioning of the first battery monitoring unit 411; the first battery management unit 412 is mounted on the first beam 21 or the second beam 22 to facilitate the assembly and positioning of the first battery management unit 412.

[0144] Please refer to Figure 3 , according to some embodiments of the present application, the first battery monitoring unit 411 is mounted on the first beam 21, and the large surface of the first battery monitoring unit 411 is disposed in contact with the wall surface of the first beam 21 that forms the first installation space 23; the first battery management unit 412 is mounted on the second beam 22 and is spaced apart from the first battery monitoring unit 411.

[0145] The large surface of the first battery monitoring unit 411 refers to the surface with a larger surface area of the first battery monitoring unit 411.

[0146] The wall surface of the first beam 21 that forms the first installation space 23 means the wall surface of the first beam 21 that is away from the first battery cell 31, and this wall surface can face the first electrical component 41.

[0147] In some embodiments, the first battery monitoring unit 411 can be connected to the first beam 21 by bolt threading to facilitate the assembly and disassembly of the first battery monitoring unit 411.

[0148] In some embodiments, the first battery management unit 412 can be connected to the second beam 22 by bolt threading to facilitate the assembly and disassembly of the first battery management unit 412.

[0149] The first battery management unit 412 is spaced apart from the first battery monitoring unit 411. For example, as Figure 3As shown, the first battery management unit 412 can be arranged at an interval from the first battery monitoring unit 411 in the second direction, and the second direction, the first direction X and the thickness direction of the bottom wall 13 are perpendicular to each other in pairs; for another example, the first battery management unit 412 can be arranged at an interval from the first battery monitoring unit 411 in the thickness direction of the bottom wall 13.

[0150] In the above solution, the first beam 21 cooperates with the first battery cell 31, and the large surface of the first battery monitoring unit 411 is attached to the wall surface of the first beam 21 that forms the first installation space 23. The first battery monitoring unit 411 and the first beam 21 have a large connection area, which can improve the connection stability between the first battery monitoring unit 411 and the first beam 21. Moreover, the distance between the first battery monitoring unit 411 and the first battery cell 31 is short, so that the connection line between the first battery monitoring unit 411 and the first battery cell 31 is short. The first battery management unit 412 is installed on the second beam 22 and is arranged at an interval from the first battery monitoring unit 411, which is convenient for improving the utilization rate of the first installation space 23 and reducing the interference risk between the first battery management unit 412 and the first battery monitoring unit 411.

[0151] Please refer to Figure 3 , according to some embodiments of the present application, a first flow channel 131 is formed inside the bottom wall 13, and the first flow channel 131 is used to accommodate a heat exchange medium; the positions where the bottom wall 13 is connected to the first beam 21 and / or the second beam 22 are avoided from the first flow channel 131.

[0152] The bottom wall 13 has a hollow structure inside, and the first flow channel 131 is formed inside the bottom wall 13 to facilitate the accommodation of the heat exchange medium.

[0153] The bottom wall 13 can be integrally extruded and formed, so as to form the first flow channel 131 inside the bottom wall 13, which is convenient for processing and manufacturing. During the extrusion molding process of the bottom wall 13, reinforcing ribs can be formed inside the bottom wall 13 to facilitate improving the overall strength of the bottom wall 13.

[0154] In some embodiments, the bottom wall 13 is welded to the first beam 21 and / or the second beam 22 to make the connection between the bottom wall 13 and the first beam 21 and / or the second beam 22 firm.

[0155] When the bottom wall 13 is connected to the first beam 21, the position where the bottom wall 13 is connected to the first beam 21 is avoided from the first flow channel 131. When the bottom wall 13 is connected to the second beam 22, the position where the bottom wall 13 is connected to the second beam 22 is avoided from the first flow channel 131. When the bottom wall 13 is connected to the first beam 21 and the second beam 22, the position where the bottom wall 13 is connected to the first beam 21 is avoided from the first flow channel 131, and the position where the bottom wall 13 is connected to the second beam 22 is avoided from the second flow channel.

[0156] The heat transfer medium mentioned in this application can be water, alcohol or other liquid mixtures.

[0157] The material of the bottom wall 13 can be a material with good heat conduction performance, such as aluminum, aluminum alloy, steel, etc.

[0158] In the above solution, by accommodating the heat transfer medium in the first flow channel 131, the temperature of the first battery cell 31 can be adjusted using the heat transfer medium, improving the cycle performance of the first battery cell 31. The positions where the bottom wall 13 is connected to the first beam 21 and / or the second beam 22 avoid the first flow channel 131, which can reduce the damage to the first flow channel 131 and improve the connection reliability between the bottom wall 13 and the first beam 21 and / or the second beam 22.

[0159] According to some embodiments of the present application, the battery device 100 further includes a first liquid inlet joint 71 and a first liquid outlet joint 72. Both the first liquid inlet joint 71 and the first liquid outlet joint 72 are connected to the bottom wall 13, and the first liquid inlet joint 71 and the first liquid outlet joint 72 are respectively communicated with the first flow channel 131; along the second direction Y, the first electrical component 41 is located between the first liquid inlet joint 71 and the first liquid outlet joint 72, and the second direction Y is perpendicular to the thickness direction of the bottom wall 13.

[0160] In some embodiments, the bottom wall 13 is provided with a first through hole and a second through hole. The first through hole communicates the first flow channel 131 with the external environment of the first flow channel 131, and the second through hole communicates the first flow channel 131 with the external environment of the first flow channel 131. The first liquid inlet joint 71 is arranged in the first through hole, and the first liquid inlet joint 71 is hermetically connected to the bottom wall 13 to reduce the risk of leakage of the heat transfer medium from the connection between the first liquid inlet joint 71 and the bottom wall 13; the first liquid outlet joint 72 is arranged in the second through hole, and the first liquid outlet joint 72 is hermetically connected to the bottom wall 13 to reduce the risk of leakage of the heat transfer medium from the connection between the first liquid outlet joint 72 and the bottom wall 13.

[0161] The first liquid inlet joint 71 and the first liquid outlet joint 72 are arranged at intervals along the second direction Y, so that the flow path of the heat transfer medium in the first flow channel 131 is longer. For example, the first liquid inlet joint 71 and the first liquid outlet joint 72 can be arranged at both ends of the bottom wall 13 in the second direction Y, so that the heat transfer medium has a longer flow path in the first flow channel 131, which is convenient for improving the heat exchange effect between the heat transfer medium and the first battery cell 31.

[0162] In the above solution, the first liquid inlet connector 71 and the first liquid outlet connector 72 are respectively connected to the first flow channel 131, facilitating the connection of the first liquid inlet connector 71 to the pipeline for inputting the heat exchange medium to deliver the heat exchange medium to the first flow channel 131, and facilitating the connection of the first liquid outlet connector 72 to the pipeline for outputting the heat exchange medium to discharge the heat exchange medium in the first flow channel 131. The first electrical component 41 is located between the first liquid inlet connector 71 and the first liquid outlet connector 72, making the structure of the first liquid inlet connector 71, the first electrical component 41, and the first liquid outlet connector 72 compact, improving the space utilization rate inside the box body 10 in the second direction Y, so as to facilitate improving the energy density of the battery device 100.

[0163] Please refer to Figure 3 , according to some embodiments of the present application, the battery device 100 further includes a first liquid inlet pipe 73, a first liquid outlet pipe 74, and a high-voltage box 60. The first liquid inlet pipe 73 is connected to the first liquid inlet connector 71; the first liquid outlet pipe 74 is connected to the first liquid outlet connector 72; the high-voltage box 60 is disposed inside the box body 10 and on the bottom wall 13, and the high-voltage box 60 is electrically connected to the first battery cell 31. Along the second direction Y, the high-voltage box 60 is located between the first liquid inlet pipe 73 and the first liquid outlet pipe 74.

[0164] The first liquid inlet pipe 73 is a pipeline for inputting the heat exchange medium into the first flow channel 131. One end of the first liquid inlet pipe 73 is connected to the first liquid inlet connector 71, and the other end of the first liquid inlet pipe 73 is used to connect to a container for storing the heat exchange medium.

[0165] The first liquid outlet pipe 74 is a pipeline for outputting the heat exchange medium from the first flow channel 131. One end of the first liquid outlet pipe 74 is connected to the first liquid outlet connector 72, and the other end of the first liquid outlet pipe 74 is used to connect to a container for storing the heat exchange medium.

[0166] The first liquid inlet pipe 73 and the first liquid outlet pipe 74 are respectively connected to the first flow channel 131 to facilitate the circulation of the heat exchange medium in the first flow channel 131 and improve the heat exchange effect.

[0167] At least a part of the high-voltage box 60 can be disposed in the first electrical compartment 12, and the high-voltage box 60 and the bottom wall 13 can be connected by bolts in a threaded manner to facilitate the assembly and disassembly of the high-voltage box 60.

[0168] The first liquid inlet pipe 73 and the first liquid outlet pipe 74 are spaced apart along the second direction Y, and there can be a relatively large distance between the first liquid inlet pipe 73 and the first liquid outlet pipe 74 to facilitate the heat exchange medium to have a longer flow path in the first flow channel 131. For example, the first liquid inlet pipe 73 and the first liquid outlet pipe 74 are disposed at both ends of the bottom wall 13 in the second direction Y.

[0169] In the above solution, the high-voltage box 60 is located between the first liquid inlet pipe 73 and the first liquid outlet pipe 74, facilitating the utilization of the space inside the box body 10 in the second direction Y and improving the space utilization rate inside the box body 10.

[0170] Please refer to Figure 2 , according to some embodiments of the present application, the first beam 21 has a first wall surface 211 facing away from the first battery cell 31, the second beam 22 has a second wall surface 221 facing away from the bottom wall 13, the first wall surface 211 and the second wall surface 221 enclose a first installation space 23, and the angle θ1 between the first wall surface 211 and the second wall surface 221 is an obtuse angle.

[0171] In some embodiments, the second wall surface 221 can be arranged parallel to the bottom wall 13, and the first wall surface 211 can be arranged obliquely with respect to the thickness direction of the bottom wall 13.

[0172] Since the angle θ1 between the first wall surface 211 and the second wall surface 221 is an obtuse angle, the opening of the first installation space 23 can be relatively large.

[0173] In the above solution, the angle between the first wall surface 211 and the second wall surface 221 is an obtuse angle, and the first installation space 23 can have a relatively large volume, so as to facilitate the accommodation of the first electrical component 41 and improve the space utilization rate inside the box body 10.

[0174] According to some embodiments of the present application, cavities are formed inside both the first beam 21 and the second beam 22.

[0175] The first beam 21 can be extrusion-molded, and at least one reinforcing rib can be arranged inside the cavity of the first beam 21, and the reinforcing rib divides the cavity into multiple chambers.

[0176] The second beam 22 can be extrusion-molded, and at least one reinforcing rib can be arranged inside the cavity of the second beam 22, and the reinforcing rib divides the cavity into multiple chambers.

[0177] In the above solution, cavities are formed inside both the first beam 21 and the second beam 22, which can reduce the weights of the first beam 21 and the second beam 22. At the same time, it is convenient to absorb the acting force of the first battery cell 31 and restrict the expansion deformation of the first battery cell 31.

[0178] Please refer to Figures 4 to 6 , Figure 4 is a cross-sectional view of the battery device provided by some other embodiments of the present application, Figure 5 is a structural exploded view of the battery device provided by some embodiments of the present application, Figure 6Partial structural schematic diagram of a battery device provided by some embodiments of the present application. According to some embodiments of the present application, the battery device 100 further includes a second battery cell 32 and a bracket 80. The second battery cell 32 is disposed in the box body 10 and arranged with the first battery cell 31 along the third direction Z. The bracket 80 is disposed between the first battery cell 31 and the second battery cell 32, and the bracket 80 bears the second battery cell 32. The box body 10 includes a bottom wall 13, and the bottom wall 13 bears the first battery cell 31. The third direction Z is parallel to the thickness direction of the bottom wall 13.

[0179] Both the second battery cell 32 and the first battery cell 31 are located in the box body 10, and the second battery cell 32 and the first battery cell 31 are arranged along the third direction Z. The second battery cell 32 and the first battery cell 31 can be two layers of battery cells distributed in the third direction Z. For example, when the third direction Z is parallel to the up-down direction, the first battery cell 31 can be the lower-layer battery cell and the second battery cell 32 can be the upper-layer battery cell.

[0180] The bracket 80 is a component that separates the first battery cell 31 and the second battery cell 32, and the bracket 80 is used to support the second battery cell 32. In some embodiments, there is a gap between the bracket 80 and the first battery cell 31 along the third direction Z.

[0181] The bottom wall 13 is used to support the first battery cell 31 to facilitate the positioning of the first battery cell 31.

[0182] In some embodiments, the bracket 80 can be arranged parallel to the bottom wall 13.

[0183] In the above solution, the bottom wall 13 bears the first battery cell 31 to facilitate the assembly and positioning of the first battery cell 31. The bracket 80 separates the first battery cell 31 and the second battery cell 32, and the bracket 80 bears the second battery cell 32 to facilitate the assembly and positioning of the second battery cell 32.

[0184] Please refer to Figure 4, according to some embodiments of the present application, the battery device 100 further includes a second expansion beam 90 and a second electrical component 42. The second expansion beam 90 is disposed on the bracket 80, and divides the space of the box body 10 on the side of the bracket 80 away from the first battery cell 31 into a second battery compartment 14 and a second electrical compartment 15. The second battery cell 32 is disposed in the second battery compartment 14 and cooperates with the second expansion beam 90. The second electrical component 42 is disposed in the second electrical compartment 15 and is electrically connected to the second battery cell 32. Wherein, the second expansion beam 90 includes a third beam 91 and a fourth beam 92 connected at an angle, and a second installation space 93 is formed between the third beam 91 and the fourth beam 92. The second installation space 93 is located in the second electrical compartment 15. At least part of the second electrical component 42 is installed on the second expansion beam 90 and is accommodated in the second installation space 93.

[0185] The second expansion beam 90 is disposed on the bracket 80, and the connection manner between the second expansion beam 90 and the bracket 80 can be various. For example, welding connection, snap connection, riveting connection, threaded connection, etc. In some embodiments, the second expansion beam 90 is welded to the bracket 80 to make the connection between the second expansion beam 90 and the bracket 80 firm.

[0186] The second expansion beam 90 can absorb the acting force of the second battery cell 32, and the second expansion beam 90 is used to restrain the expansion and deformation of the second battery cell 32.

[0187] The second expansion beam 90 divides the space inside the box body 10 on the side of the bracket 80 away from the first battery cell 31 into a second battery compartment 14 and a second electrical compartment 15. The second expansion beam 90 can extend along the second direction Y, and the second battery compartment 14 and the second electrical compartment 15 can be distributed along the first direction X.

[0188] The second battery compartment 14 is used to accommodate the second battery cell 32, and the second electrical compartment 15 is used to accommodate the electrical components of the battery device 100. The electrical components can include but are not limited to the second electrical component 42.

[0189] The second electrical component 42 is an electrical component electrically connected to the second battery cell 32. The second electrical component 42 is used to monitor information such as the voltage, temperature or current of the second battery cell 32, and the second electrical component 42 is also used for real-time monitoring, control and protection of the second battery cell 32. For example, the second electrical component 42 can include but are not limited to a second battery monitoring unit, a second battery management unit, etc.

[0190] In some embodiments, the battery device 100 may further include a fourth expansion beam 52 disposed within the box body 10. The fourth expansion beam 52 and the second expansion beam 90 may be spaced apart along the first direction X. The second battery cell 32 is disposed between the fourth expansion beam 52 and the second expansion beam 90. The first direction X may be perpendicular to the major surface of the second battery cell 32. The major surface of the second battery cell 32 refers to the surface with a larger surface area of the second battery cell 32.

[0191] The second expansion beam 90 has a certain strength. The material of the second expansion beam 90 may be metal, such as aluminum, aluminum alloy, steel, etc.

[0192] The third beam 91 and the fourth beam 92 are two components constituting the second expansion beam 90. The third beam 91 and the fourth beam 92 may be integrally formed. For example, the second expansion beam 90 is integrally extruded.

[0193] The angle between the third beam 91 and the fourth beam 92 may be an acute angle, a right angle or an obtuse angle. Optionally, the angle between the third beam 91 and the fourth beam 92 is greater than or equal to 90°. When ensuring that the second expansion beam 90 has a relatively high overall strength, the second installation space 93 may have a relatively large volume.

[0194] The installation method of the second electrical component 42 and the second expansion beam 90 may be various, such as screw connection, welding connection, snap connection, etc.

[0195] When the second electrical component 42 is assembled with the second expansion beam 90, a part of the second electrical component 42 may be located within the second installation space 93, or the whole of the second electrical component 42 may be located within the second installation space 93.

[0196] In the above solution, the third beam 91 and the fourth beam 92 are arranged at an angle, which can enhance the overall strength of the second expansion beam 90 to facilitate restraining the expansion and deformation of the second battery cell 32. At least part of the second electrical component 42 is installed within the second installation space 93 formed by the third beam 91 and the fourth beam 92. By using the second installation space 93, the internal structure installation of the box body 10 is made compact, the space utilization rate inside the box body 10 is improved, and the battery device 100 has a relatively high energy density.

[0197] Please refer to Figure 4 , according to some embodiments of the present application, the bracket 80 has a first end 81. Along the first direction X, the first end 81 extends beyond the first battery cell 31 and the second battery cell 32. The first direction X is perpendicular to the third direction Z. Along the third direction Z, the second expansion beam 90 and the first expansion beam 20 are located on both sides of the first end 81.

[0198] The first end portion 81 can be an end portion of the bracket 80 in the first direction X. In the direction from the first battery compartment 11 to the second electrical compartment 15, the first end portion 81 extends beyond the first battery cell 31 and the second battery cell 32, such that along the third direction Z, the second expansion beam 90 and the first expansion beam 20 are located on both sides of the first end portion 81.

[0199] In some embodiments, in the same projection plane perpendicular to the third direction Z, the orthographic projection of the second expansion beam 90 and the orthographic projection of the first expansion beam 20 at least partially overlap. Optionally, in the same projection plane perpendicular to the third direction Z, the orthographic projection of the second expansion beam 90 and the orthographic projection of the first expansion beam 20 completely overlap.

[0200] In the above solution, the first end portion 81 extends beyond the first battery cell 31 and the second battery cell 32, and the second expansion beam 90 and the first expansion beam 20 are located on both sides of the first end portion 81 in the third direction Z, facilitating the layout of the first electrical component 41 and the second electrical component 42 and improving the space utilization rate on both sides of the bracket 80 in the third direction Z.

[0201] Please refer to Figure 4 , according to some embodiments of the present application, the box body 10 includes a bottom wall 13, the bottom wall 13 bears the first battery cell 31, the first battery compartment 11 and the first electrical compartment 12 are sequentially distributed along the first direction X, and the first direction X is perpendicular to the thickness direction of the bottom wall 13; along the direction from the first battery compartment 11 to the first electrical compartment 12, the bottom wall 13 extends beyond the bracket 80, the first electrical compartment 12 is communicated with the second electrical compartment 15, and the third direction Z is parallel to the thickness direction of the bottom wall 13.

[0202] The bottom wall 13 is used to support the first battery cell 31, and the first battery cell 31 can be bonded to the bottom wall 13 to realize the assembly and positioning of the first battery cell 31.

[0203] In some embodiments, the box body 10 further includes a first side wall 16 and a second side wall 17. The first side wall 16 and the second side wall 17 are arranged at intervals along the first direction X. The first side wall 16 and the second side wall 17 are located at opposite ends of the bottom wall 13 in the first direction. One end of the first side wall 16 is connected to the bottom wall 13, and one end of the second side wall 17 is connected to the bottom wall 13. The first electrical component 41, the first expansion beam 20 and the first battery cell 31 are all arranged between the first side wall 16 and the second side wall 17. The first expansion beam 20 is closer to the first side wall 16 than the first battery cell 31. The first side wall 16, the first expansion beam 20 and the bottom wall 13 enclose the first electrical compartment 12. Along the direction from the first battery compartment 11 to the first electrical compartment 12, the bottom wall 13 extends beyond the bracket 80, such that there is a gap between the bracket 80 and the first side wall 16, and the first electrical compartment 12 is communicated with the second electrical compartment 15.

[0204] After the first electrical compartment 12 communicates with the second electrical compartment 15, the portion of the bottom wall 13 that extends beyond the bracket 80 has a relatively large space in the third direction Z, which can accommodate more electrical components, and the space inside the box body 10 in the third direction Z can be utilized.

[0205] In the above solution, the first electrical compartment 12 communicates with the second electrical compartment 15, which facilitates the setting of other components in the space where the bottom wall 13 extends beyond the bracket 80, so as to improve the space utilization rate inside the box body 10.

[0206] Please refer to Figure 4 , according to some embodiments of the present application, the battery device 100 further includes a high-voltage box 60, and the high-voltage box 60 is arranged on the bottom wall 13 and is arranged in the first electrical compartment 12 and the second electrical compartment 15.

[0207] The high-voltage box 60 is arranged in the first electrical compartment 12 and the second electrical compartment 15, and the high-voltage box 60 extends beyond the surface of the bracket 80 facing away from the bottom wall 13 in the third direction Z, and relatively large electrical components can be arranged in the third direction Z to reduce the space occupation in the first direction X.

[0208] In the above solution, the high-voltage box 60 is arranged in the first electrical compartment 12 and the second electrical compartment 15, which can improve the utilization rate of the space where the bottom wall 13 extends beyond the bracket 80, making the component structure inside the box body 10 compact.

[0209] Please refer to Figure 4 and further refer to Figure 7 , Figure 7 is a cross-sectional view of a part of the structure of the battery device provided by some other embodiments of the present application. According to some embodiments of the present application, the third beam 91 cooperates with the second battery cell 32, and the third beam 91 and / or the fourth beam 92 are connected to the bracket 80; the second electrical component 42 includes a second battery monitoring unit 421 and a second battery management unit 422, the second battery monitoring unit 421 is installed on either the third beam 91 or the fourth beam 92, and the second battery management unit 422 is installed on either the third beam 91 or the fourth beam 92.

[0210] There are various ways for the third beam 91 to cooperate with the second battery cell 32. For example, the third beam 91 can be connected to the second battery cell 32 through a buffer pad, or the third beam 91 can be arranged in close contact with the large surface of the second battery cell 32.

[0211] In some embodiments, the third beam 91 can be connected to the bracket 80, or the fourth beam 92 can be connected to the bracket 80, or the third beam 91 and the fourth beam 92 are respectively connected to the bracket 80.

[0212] Optionally, the fourth beam 92 may be located at one end of the third beam 91 close to the bracket 80, and the fourth beam 92 and the third beam 91 are respectively connected to the bracket 80.

[0213] The connection manner between the third beam 91 and / or the fourth beam 92 and the bracket 80 may be various. For example, it may be a welding connection, an adhesive connection, a snap connection, a threaded connection, etc. In some embodiments, the third beam 91 and / or the fourth beam 92 are welded to the bracket 80, so that the third beam 91 and / or the fourth beam 92 are firmly connected to the bracket 80.

[0214] The second battery monitoring unit 421 is used to monitor battery state information such as the voltage and temperature of the second battery cell 32.

[0215] In some embodiments, the battery device 100 further includes a second sampling component. The second sampling component is electrically connected to the second battery monitoring unit 421, and the second sampling component is electrically connected to the second battery cell 32, and collects voltage signals, temperature signals, current signals, etc. of the second battery cell 32.

[0216] The second battery monitoring unit 421 may be installed on the third beam 91, or the second battery monitoring unit 421 may be installed on the fourth beam 92.

[0217] The second battery management unit 422 is used to monitor, control, and protect the second battery cell 32 in real time, and the second battery monitoring unit 421 may be electrically connected to the second battery management unit 422.

[0218] The second battery management unit 422 may be installed on the third beam 91, or the second battery management unit 422 may be installed on the fourth beam 92.

[0219] In the above solution, the third beam 91 and / or the fourth beam 92 are connected to the bracket 80 to facilitate the assembly and positioning of the second expansion beam 90, and to facilitate restraining the expansion and deformation of the second battery cell 32 through the second expansion beam 90. The second battery monitoring unit 421 is used to monitor battery state information such as the voltage and temperature of the second battery cell 32. The second battery monitoring unit 421 is installed on the third beam 91 or the fourth beam 92 to facilitate the assembly and positioning of the second battery monitoring unit 421; the second battery management unit 422 is used to monitor, control, and protect the second battery cell 32 in real time. The second battery management unit 422 is installed on the third beam 91 or the fourth beam 92 to facilitate the assembly and positioning of the second battery management unit 422.

[0220] Please refer to Figure 7, according to some embodiments of the present application, the second battery monitoring unit 421 is installed on the third beam 91, and the large surface of the second battery monitoring unit 421 is attached to the third beam 91 to form the wall surface of the second installation space 93; the second battery management unit 422 is installed on the fourth beam 92 and is spaced apart from the second battery monitoring unit 421.

[0221] The large surface of the second battery monitoring unit 421 refers to the surface with a larger surface area of the second battery monitoring unit 421.

[0222] The wall surface of the third beam 91 that forms the second installation space 93 refers to the wall surface of the third beam 91 away from the second battery cell 32, and this wall surface can be oriented towards the second electrical component 42.

[0223] In some embodiments, the second battery monitoring unit 421 can be threadedly connected to the third beam 91 by bolts to facilitate the assembly and disassembly of the second battery monitoring unit 421.

[0224] In some embodiments, the second battery management unit 422 can be threadedly connected to the fourth beam 92 by bolts to facilitate the assembly and disassembly of the second battery management unit 422.

[0225] The second battery management unit 422 is spaced apart from the second battery monitoring unit 421. For example, the second battery management unit 422 can be spaced apart from the second battery monitoring unit 421 along the second direction Y, or for another example, the second battery management unit 422 can be spaced apart from the second battery monitoring unit 421 along the third direction Z.

[0226] In the above solution, the third beam 91 cooperates with the second battery cell 32, the large surface of the second battery monitoring unit 421 is attached to the wall surface of the third beam 91 that forms the second installation space 93, and the second battery monitoring unit 421 and the third beam 91 have a relatively large connection area, which can improve the connection stability between the second battery monitoring unit 421 and the third beam 91. Moreover, the distance between the second battery monitoring unit 421 and the second battery cell 32 is short, making the connection line between the second battery monitoring unit 421 and the second battery cell 32 short. The second battery management unit 422 is installed on the fourth beam 92 and is spaced apart from the second battery monitoring unit 421, which is convenient for improving the utilization rate of the second installation space 93 and reducing the interference risk between the second battery management unit 422 and the second battery monitoring unit 421.

[0227] Please refer to Figure 4According to some embodiments of the present application, the third beam 91 cooperates with the second battery cell 32, and the third beam 91 and / or the fourth beam 92 are connected to the bracket 80; the third beam 91 has a third wall 911 facing away from the second battery cell 32, and the fourth beam 92 has a fourth wall 921 facing away from the bracket 80, the third wall 911 and the fourth wall 921 enclose a second installation space 93, and the angle θ2 between the third wall 911 and the fourth wall 921 is an obtuse angle.

[0228] The third beam 91 and / or the fourth beam 92 are connected to the bracket 80 so that the second expansion beam 90 is firmly connected to the bracket 80 .

[0229] In some embodiments, the fourth wall 921 may be arranged parallel to the bracket 80 , the third wall 911 may be arranged obliquely to the thickness direction of the bracket 80 , and the thickness direction of the bracket 80 may be parallel to the third direction Z.

[0230] The angle θ2 between the third wall surface 911 and the fourth wall surface 921 is an obtuse angle, and the opening of the second installation space 93 can be larger.

[0231] In the above solution, the third beam 91 and / or the fourth beam 92 are connected to the bracket 80 to facilitate the assembly and positioning of the second expansion beam 90, so as to facilitate the second expansion beam 90 to constrain the expansion and deformation of the second battery cell 32. The angle θ2 between the third wall 911 and the fourth wall 921 is an obtuse angle, and the second installation space 93 can have a larger volume to accommodate the second electrical component 42 and improve the space utilization inside the box 10.

[0232] Please refer to Figure 7 According to some embodiments of the present application, a second flow channel 82 is formed inside the bracket 80, and the second flow channel 82 is used to accommodate a heat exchange medium; the position where the bracket 80 is connected to the third beam 91 and / or the fourth beam 92 avoids the second flow channel 82.

[0233] The support 80 is a hollow structure, and the second flow channel 82 is formed inside the support 80 to accommodate the heat exchange medium.

[0234] The bracket 80 can be integrally extruded to form the second flow channel 82 inside the bracket 80 for easy processing and manufacturing. During the extrusion process of the bracket 80 , a reinforcing rib can be formed inside the bracket 80 to improve the overall strength of the bracket 80 .

[0235] In some embodiments, the bracket 80 is welded to the third beam 91 and / or the fourth beam 92 so that the bracket 80 is firmly connected to the third beam 91 and / or the fourth beam 92 .

[0236] When the bracket 80 is connected to the third beam 91, the connection position of the bracket 80 and the third beam 91 is avoided from the second flow channel 82. When the bracket 80 is connected to the fourth beam 92, the connection position of the bracket 80 and the fourth beam 92 is avoided from the second flow channel 82. When the bracket 80 is connected to the third beam 91 and the fourth beam 92, the connection position of the bracket 80 and the third beam 91 is avoided from the second flow channel 82, and the connection position of the bracket 80 and the fourth beam 92 is avoided from the second flow channel 82.

[0237] The material of the bracket 80 can be a material with good heat conduction performance, for example, aluminum, aluminum alloy, steel, etc.

[0238] In the above solution, by accommodating the heat exchange medium in the second flow channel 82, the temperature of the second battery cell 32 can be adjusted by using the heat exchange medium, and the cycle performance of the second battery cell 32 can be improved. At the same time, the bracket 80 is located between the first battery cell 31 and the second battery, and the heat exchange medium in the bracket 80 can also adjust the temperature of the first battery cell 31. The connection position of the bracket 80 and the third beam 91 and / or the fourth beam 92 is avoided from the second flow channel 82, which can reduce the damage to the second flow channel 82 and improve the connection reliability between the bracket 80 and the third beam 91 and / or the fourth beam 92.

[0239] Please refer to Figure 7 , according to some embodiments of the present application, the battery device 100 further includes a second liquid inlet joint 75 and a second liquid outlet joint 76. Both the second liquid inlet joint 75 and the second liquid outlet joint 76 are connected to the bracket 80, and the second liquid inlet joint 75 and the second liquid outlet joint 76 are respectively communicated with the second flow channel 82; both the second liquid inlet joint 75 and the second liquid outlet joint 76 are located in the first electrical compartment 12. Along the second direction Y, the first electrical component 41 is located between the second liquid inlet joint 75 and the second liquid outlet joint 76, and the second direction Y is perpendicular to the third direction Z.

[0240] In some embodiments, a third through hole and a fourth through hole are opened on one side of the bracket 80 facing the bottom wall 13. The third through hole communicates the second flow channel 82 with the external environment of the second flow channel 82, and the fourth through hole communicates the second flow channel 82 with the external environment of the second flow channel 82. The second liquid inlet joint 75 is disposed in the third through hole, and the second liquid inlet joint 75 is hermetically connected to the bracket 80 to reduce the risk of leakage of the heat exchange medium from the connection between the second liquid inlet joint 75 and the bracket 80; the second liquid outlet joint 76 is disposed in the fourth through hole, and the second liquid outlet joint 76 is hermetically connected to the bracket 80 to reduce the risk of leakage of the heat exchange medium from the connection between the second liquid outlet joint 76 and the bracket 80.

[0241] The second liquid inlet joint 75 and the second liquid outlet joint 76 are arranged at intervals along the second direction Y, so as to facilitate a longer flow path of the heat exchange medium in the second flow channel 82. For example, the second liquid inlet joint 75 and the second liquid outlet joint 76 can be arranged at both ends of the bracket 80 in the second direction Y, so as to facilitate a longer flow path of the heat exchange medium in the second flow channel 82, so as to improve the heat exchange effect between the heat exchange medium and the second battery cell 32.

[0242] In the above solution, the second liquid inlet joint 75 and the second liquid outlet joint 76 are respectively communicated with the second flow channel 82, which is convenient for connecting with the pipeline for inputting the heat exchange medium through the second liquid inlet joint 75 to transport the heat exchange medium to the second flow channel 82, and is convenient for connecting with the pipeline for outputting the heat exchange medium through the second liquid outlet joint 76 to discharge the heat exchange medium in the second flow channel 82. Along the third direction Z, the second liquid inlet joint 75 and the second liquid outlet joint 76 are located on one side of the bracket 80 facing the bottom wall 13, and the first electrical component 41 is located between the second liquid inlet joint 75 and the second joint, so that the second liquid inlet joint 75, the first electrical component 41 and the second liquid outlet joint 76 are structurally compact, improving the space utilization rate inside the box body 10 in the second direction Y, so as to improve the energy density of the battery device 100.

[0243] Please refer to Figure 7 and further refer to Figure 8 and Figure 9 Figure 8 which is a partial structural schematic diagram of the battery device provided by some other embodiments of the present application, Figure 9 is Figure 8 a partial enlarged view of A in. According to some embodiments of the present application, the battery device 100 further includes a second liquid inlet pipe 77, a second liquid outlet pipe 78 and a high-voltage box 60. The second liquid inlet pipe 77 is connected to the second liquid inlet joint 75; the second liquid outlet pipe 78 is connected to the second liquid outlet joint 76; the high-voltage box 60 is arranged inside the box body 10, and the first battery cell 31 and the second battery cell 32 are respectively electrically connected to the high-voltage box 60. Along the second direction Y, the high-voltage box 60 is located between the second liquid inlet pipe 77 and the second liquid outlet pipe 78.

[0244] For the convenience of assembly, the second liquid inlet pipe 77 and the second liquid outlet pipe 78 are located on one side of the bracket 80 facing the bottom wall 13.

[0245] The second liquid inlet pipe 77 is a pipe for inputting the heat exchange medium into the second flow channel 82. One end of the second liquid inlet pipe 77 is connected to the second liquid inlet joint 75, and the other end of the second liquid inlet pipe 77 is used to connect to a container for storing the heat exchange medium.

[0246] The second liquid outlet pipe 78 is a pipe for outputting the heat exchange medium from the second flow channel 82. One end of the second liquid outlet pipe 78 is connected to the second liquid outlet joint 76, and the other end of the second liquid outlet pipe 78 is used to connect to a container for storing the heat exchange medium.​

[0247] The second liquid inlet pipe 77 and the second liquid outlet pipe 78 are respectively communicated with the second flow channel 82, so as to facilitate the circulation of the heat exchange medium in the second flow channel 82 and improve the heat exchange effect.

[0248] In some embodiments, for the convenience of transporting the heat exchange medium, please refer to Figure 9 , the battery device 100 further includes a liquid inlet main pipe 791 and a liquid outlet main pipe 792. The first liquid inlet pipe 73 and the second liquid inlet pipe 77 are respectively connected to the liquid inlet main pipe 791, and the first liquid outlet pipe 74 and the second liquid outlet pipe 78 are respectively connected to the liquid outlet main pipe 792. Optionally, the first liquid inlet pipe 73 and the second liquid inlet pipe 77 may be located at the same end of the bottom wall 13 in the second direction Y, and the first liquid outlet pipe 74 and the second liquid outlet pipe 78 may be located at the same end of the bottom wall 13 in the second direction Y.

[0249] At least a part of the high-voltage box 60 is disposed in the first electrical compartment 12. Along the second direction Y, the high-voltage box 60 is located between the second liquid inlet pipe 77 and the second liquid outlet pipe 78.

[0250] The second liquid inlet pipe 77 and the second liquid outlet pipe 78 are spaced apart along the second direction Y. A relatively large distance may be provided between the second liquid inlet pipe 77 and the second liquid outlet pipe 78, so as to facilitate the heat exchange medium to have a longer flow path in the second flow channel 82. For example, the second liquid inlet pipe 77 and the second liquid outlet pipe 78 may be disposed at both ends of the bracket 80 in the second direction Y.

[0251] In the above solution, the second liquid inlet pipe 77 and the second liquid outlet pipe 78 are located in the first electrical compartment 12, and the high-voltage box 60 is located between the second liquid inlet pipe 77 and the second liquid outlet pipe 78, which is convenient for utilizing the space inside the box body 10 in the second direction Y and improving the space utilization rate inside the box body 10.

[0252] According to some embodiments of the present application, cavities are formed inside both the third beam 91 and the fourth beam 92.

[0253] The third beam 91 can be extruded. At least one reinforcing rib may be disposed in the cavity of the third beam 91, and the reinforcing rib divides the cavity into multiple chambers.

[0254] The fourth beam 92 can be extruded. At least one reinforcing rib may be disposed in the cavity of the fourth beam 92, and the reinforcing rib divides the cavity into multiple chambers.

[0255] In the above solution, cavities are formed inside both the third beam 91 and the fourth beam 92, which can reduce the weights of the third beam 91 and the fourth beam 92. At the same time, it is convenient to absorb the acting force of the second battery cell 32 and restrain the expansion deformation of the second battery cell 32.

[0256] Please refer to Figure 10, Figure 10 A schematic exploded view of the structure of the battery device provided in some other embodiments of the present application. According to some embodiments of the present application, the box body 10 includes a first box body 10a and a second box body 10b. The first box body 10a and the second box body 10b are snapped together to form an accommodation space, and the first battery cell 31 and the second battery cell 32 are accommodated in the accommodation space.

[0257] In some embodiments, the first box body 10a and the second box body 10b are arranged in the third direction Z. The first box body 10a can be the lower box body, and the second box body 10b can be the box cover.

[0258] According to some embodiments of the present application, the embodiments of the present application further provide an electrical device, which includes the battery device 100 provided in any of the above embodiments. The battery device 100 is used to provide electrical energy.

[0259] The electrical device can be any of the above devices or systems that apply the battery device 100.

[0260] According to some embodiments of the present application, please refer to Figures 2 to 10 , the embodiments of the present application provide a battery device 100, which includes a box body 10, a first battery cell 31, a first expansion beam 20, a first electrical component 41, a second battery cell 32, a bracket 80, a second expansion beam 90, a second electrical component 42, and a high-voltage box 60.

[0261] The box body 10 includes a first box body 10a and a second box body 10b. The first box body 10a and the second box body 10b are snapped together to form an accommodation space. The first battery cell 31 and the second battery cell 32 are accommodated in the accommodation space, and the first battery cell 31 and the second battery cell 32 are arranged along the third direction Z. The bracket 80 is arranged in the accommodation space, and the bracket 80 separates the first battery cell 31 and the second battery cell 32. The first battery cell 31 and the first expansion beam 20 are located in the space surrounded by the bracket 80 and the first box body 10a, and the second battery cell 32 and the second expansion beam 90 are located in the space surrounded by the bracket 80 and the second box body 10b.

[0262] The first box body 10a includes a bottom wall 13. The first battery cell 31 and the first expansion beam 20 are arranged on the bottom wall 13. The bracket 80 is arranged parallel to the bottom wall 13. The second battery cell 32 and the second expansion beam 90 are arranged on the bracket 80.

[0263] The first expansion beam 20 divides the space enclosed by the bracket 80 and the bottom wall 13 into a first battery compartment 11 and a first electrical compartment 12. The first battery compartment 11 and the first electrical compartment 12 are distributed along the first direction X. The first battery cell 31 is disposed in the first battery compartment 11, and the first electrical component 41 is disposed in the first electrical compartment 12. The first expansion beam 20 includes a first beam 21 and a second beam 22. A first installation space 23 is formed between the first beam 21 and the second beam 22. The first installation space 23 is located in the first electrical compartment 12. The first beam 21 cooperates with the first battery cell 31.

[0264] The second expansion beam 90 separates the space on the side of the bracket 80 away from the bottom wall 13 into a second battery compartment 14 and a second electrical compartment 15. The second battery compartment 14 and the second electrical compartment 15 are distributed along the first direction X. The second battery cell 32 is disposed in the second battery compartment 14, and the second electrical component 42 is disposed in the second electrical compartment 15. The first battery compartment 11 and the second battery compartment 14 are located on both sides of the bracket 80 in the third direction Z. The second expansion beam 90 includes a third beam 91 and a fourth beam 92. A second installation space 93 is formed between the third beam 91 and the fourth beam 92. The second installation space 93 is located in the second electrical compartment 15. The third beam 91 cooperates with the second battery cell 32.

[0265] In the direction from the first battery compartment 11 to the first electrical compartment 12 , the bottom wall 13 extends beyond the bracket 80 , the first electrical compartment 12 and the second electrical compartment 15 are connected, and the high-voltage box 60 is disposed on the bottom wall 13 . The high-voltage box 60 is located between the first electrical compartment 12 and the second electrical compartment 15 .

[0266] According to the battery device 100 of the embodiment of the present application, the first electrical component 41 is arranged in the first installation space 23, the second electrical component 42 is arranged in the second installation space 93, and the high-voltage box 60 is arranged in the first electrical compartment 12 and the second electrical compartment 15, so that the electrical components are installed compactly inside the box body 10, thereby improving the space utilization inside the box body 10 and making the battery device 100 have a higher energy density.

[0267] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A box body; A first expansion beam, disposed within the box body and dividing the space within the box body into a first battery compartment and a first electrical compartment; A first battery cell, disposed within the first battery compartment and cooperating with the first expansion beam; A first electrical component, disposed within the first electrical compartment and electrically connected to the first battery cell; Wherein, the first expansion beam includes a first beam and a second beam connected at an angle, a first installation space is formed between the first beam and the second beam, the first installation space is located within the first electrical compartment, at least a part of the first electrical component is installed on the first expansion beam and accommodated within the first installation space.

2. The battery device according to claim 1, characterized in that, The box body includes a bottom wall, the bottom wall bears the first battery cell, the first beam cooperates with the first battery cell, and the first beam and / or the second beam are connected to the bottom wall.

3. The battery device according to claim 2, wherein The battery device further includes a high-voltage box, the high-voltage box is disposed within the first electrical compartment, the high-voltage box is electrically connected to the first battery cell, along a first direction, the high-voltage box, the first expansion beam and the first battery cell are sequentially distributed, and the first direction is perpendicular to the thickness direction of the bottom wall.

4. The battery device according to claim 2, wherein, The first electrical component includes a first battery monitoring unit and a first battery management unit; The first battery monitoring unit is installed on either the first beam or the second beam, and the first battery management unit is installed on either the first beam or the second beam.

5. The battery device according to claim 4, wherein, The first battery monitoring unit is installed on the first beam, and the large surface of the first battery monitoring unit is disposed in contact with the wall surface of the first beam forming the first installation space; The first battery management unit is installed on the second beam and is spaced apart from the first battery monitoring unit.

6. The battery device according to claim 2, wherein, A first flow channel is formed inside the bottom wall, and the first flow channel is used to accommodate a heat exchange medium; The position where the bottom wall is connected to the first beam and / or the second beam avoids the first flow channel.

7. The battery device according to claim 6, characterized in that, The battery device further includes a first liquid inlet joint and a first liquid outlet joint, both the first liquid inlet joint and the first liquid outlet joint are connected to the bottom wall, and the first liquid inlet joint and the first liquid outlet joint are respectively communicated with the first flow channel; Along a second direction, the first electrical component is located between the first liquid inlet joint and the first liquid outlet joint, and the second direction is perpendicular to the thickness direction of the bottom wall.

8. The battery device according to claim 7, characterized in that, The battery device further includes: A first liquid inlet pipe, connected to the first liquid inlet joint; A first liquid outlet pipe, connected to the first liquid outlet joint; A high-voltage box, disposed within the box body and on the bottom wall, the high-voltage box is electrically connected to the first battery cell, along the second direction, the high-voltage box is located between the first liquid inlet pipe and the first liquid outlet pipe.

9. The battery device according to claim 2, characterized in that, The first beam has a first wall surface facing away from the first battery cell, the second beam has a second wall surface facing away from the bottom wall, the first wall surface and the second wall surface enclose the first installation space, and the angle between the first wall surface and the second wall surface is an obtuse angle.

10. The battery device according to any one of claims 1 to 9, characterized in that, Cavities are formed inside both the first beam and the second beam.

11. The battery device according to claim 1, wherein, The battery device further includes: The second battery cell is disposed within the box body and is arranged with the first battery cell along a third direction; A bracket is disposed between the first battery cell and the second battery cell, and the bracket bears the second battery cell; The box body includes a bottom wall that bears the first battery cell, and the third direction is parallel to the thickness direction of the bottom wall.

12. The battery device according to claim 11, characterized in that, The battery device further includes: A second expansion beam is disposed on the bracket and divides the space on the side of the bracket away from the first battery cell of the box body into a second battery compartment and a second electrical compartment. The second battery cell is disposed in the second battery compartment and cooperates with the second expansion beam; A second electrical component is disposed in the second electrical compartment and is electrically connected to the second battery cell; Wherein, the second expansion beam includes a third beam and a fourth beam connected at an angle, and a second installation space is formed between the third beam and the fourth beam. The second installation space is located in the second electrical compartment, and at least a part of the second electrical component is installed on the second expansion beam and accommodated in the second installation space.

13. The battery device according to claim 12, characterized in that, The bracket has a first end portion that extends beyond the first battery cell and the second battery cell along a first direction, and the first direction is perpendicular to the third direction; Along the third direction, the second expansion beam and the first expansion beam are located on both sides of the first end portion.

14. The battery device according to claim 13, characterized in that, The box body includes a bottom wall that bears the first battery cell, and the first battery compartment and the first electrical compartment are sequentially distributed along the first direction, and the first direction is perpendicular to the thickness direction of the bottom wall; Along the direction from the first battery compartment to the first electrical compartment, the bottom wall extends beyond the bracket, the first electrical compartment communicates with the second electrical compartment, and the third direction is parallel to the thickness direction of the bottom wall.

15. The battery device according to claim 14, characterized in that, The battery device further includes a high-voltage box, and the high-voltage box is disposed on the bottom wall and is disposed in the first electrical compartment and the second electrical compartment.

16. The battery device according to claim 12, characterized in that, The third beam cooperates with the second battery cell, and the third beam and / or the fourth beam are connected to the bracket; The second electrical component includes a second battery monitoring unit and a second battery management unit. The second battery monitoring unit is installed on either the third beam or the fourth beam, and the second battery management unit is installed on either the third beam or the fourth beam.

17. The battery device according to claim 16, wherein, The second battery monitoring unit is installed on the third beam, and the large surface of the second battery monitoring unit is attached to the third beam to form the wall surface of the second installation space; The second battery management unit is installed on the fourth beam and is spaced apart from the second battery monitoring unit.

18. The battery device according to claim 12, wherein The third beam cooperates with the second battery cell, and the third beam and / or the fourth beam are connected to the bracket; The third beam has a third wall surface facing away from the second battery cell, and the fourth beam has a fourth wall surface facing away from the bracket. The third wall surface and the fourth wall surface enclose the second installation space, and the angle between the third wall surface and the fourth wall surface is an obtuse angle.

19. The battery device according to claim 12, characterized in that, A second flow channel is formed inside the bracket, and the second flow channel is used to accommodate a heat exchange medium; The positions where the bracket is connected to the third beam and / or the fourth beam are avoided from the second flow channel.

20. The battery device according to claim 19, wherein, The battery device further includes a second liquid inlet joint and a second liquid outlet joint. Both the second liquid inlet joint and the second liquid outlet joint are connected to the bracket, and the second liquid inlet joint and the second liquid outlet joint are respectively communicated with the second flow channel; Both the second liquid inlet joint and the second liquid outlet joint are located in the first electrical compartment. Along the second direction, the first electrical component is located between the second liquid inlet joint and the second liquid outlet joint, and the second direction is perpendicular to the third direction.

21. The battery device according to claim 20, characterized in that, The battery device further includes: A second liquid inlet pipe connected to the second liquid inlet joint; A second liquid outlet pipe connected to the second liquid outlet joint; A high-voltage box disposed inside the box body. The first battery cell and the second battery cell are respectively electrically connected to the high-voltage box. Along the second direction, the high-voltage box is located between the second liquid inlet pipe and the second liquid outlet pipe.

22. The battery device according to any one of claims 12 to 21, characterized in that, Cavities are formed inside both the third beam and the fourth beam.

23. An electrical device, characterized in that, Including the battery device according to any one of claims 1 to 22, the battery device is used to provide electric energy.

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