Battery device and electric apparatus

Abstract

A battery device (100) and an electric apparatus. The battery device (100) comprises a case (10), a first expansion beam (20), a first battery cell (31) and a first electrical component (41). The first expansion beam (20) is disposed in the case (10) and divides the internal space of the case (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); and the first electrical component (41) is disposed in the first electrical compartment (12) and is electrically connected to the first battery cell (31). The first expansion beam (20) comprises a first beam (21) and a second beam (22) connected at an included angle, wherein a first mounting space (23) is formed between the first beam (21) and the second beam (22), the first mounting space (23) is located in the first electrical compartment (12), and the first electrical component (41) is at least partially mounted on the first expansion beam (20) and is accommodated in the first mounting space (23). By means of the above-described technical solution, the energy density of the battery device (100) can be improved.

Description

Battery devices and electrical equipment Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Energy density is a crucial factor in the manufacturing process of battery devices. Therefore, improving battery energy density is a pressing technical challenge that needs to be addressed in battery technology.

[0004] Summary of the Invention

[0005] This application provides a battery device and an electrical appliance that can improve the energy density of the battery device.

[0006] This application is achieved through the following technical solution:

[0007] In a first aspect, embodiments of this application provide a battery device, which includes a housing, a first expansion beam, a first battery cell, and a first electrical component. The first expansion beam is disposed within the housing and divides the space within the housing 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, a first mounting space is formed between the first beam and the second beam, the first mounting space is located within the first electrical compartment, and at least a portion of the first electrical component is mounted on the first expansion beam and housed within the first mounting space.

[0008] According to the battery device of the present application embodiment, the first beam and the second beam are arranged at an angle, which can enhance the overall strength of the first expansion beam so as to constrain 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, thereby improving the utilization rate of the first installation space, making the internal structure of the box compact, improving the internal space utilization rate of the box, and making the battery device have a high energy density.

[0009] According to some embodiments of this application, the housing includes a bottom wall that supports a first battery cell, a first beam that cooperates with the first battery cell, and the first beam and / or a second beam that are connected to the bottom wall.

[0010] In the above scheme, 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 the constraint of the expansion deformation of the first battery cell through the first expansion beam.

[0011] According to some embodiments of this application, the battery device further includes a high-voltage box, which is disposed in the first electrical compartment and electrically connected to the first battery cell. The high-voltage box, the first expansion beam, and the first battery cell are distributed sequentially along a first direction, which is perpendicular to the thickness direction of the bottom wall.

[0012] In the above scheme, the high-voltage box, the first expansion beam and the first battery cell are distributed in sequence to make good use of the space in the first direction inside the box, so as to make the battery device structure compact.

[0013] According to some embodiments of this 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.

[0014] In the above scheme, the first battery monitoring unit is used to monitor the battery status information such as 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.

[0015] According to some embodiments of this application, a first battery monitoring unit is installed on a first beam, and the large surface of the first battery monitoring unit is attached to the wall surface of the first beam forming a first installation space; a first battery management unit is installed on a second beam and is spaced apart from the first battery monitoring unit.

[0016] In the above scheme, the first beam cooperates with the first battery cell, and the large surface of the first battery monitoring unit is attached to the wall of the first beam forming the first installation space. The first battery monitoring unit and the first beam have a large connection area, which can improve the connection stability between the first battery monitoring unit and the first beam. Furthermore, the distance between the first battery monitoring unit and the first battery cell is short, resulting in a shorter connection line between the first battery monitoring unit and the first battery cell. The first battery management unit is installed on the second beam and is spaced apart from the first battery monitoring unit, which facilitates the utilization of the first installation space and reduces the risk of interference between the first battery management unit and the first battery monitoring unit.

[0017] According to some embodiments of this application, a first flow channel is formed inside the bottom wall, the first flow channel being used to contain the heat exchange medium; the position where the bottom wall connects to the first beam and / or the second beam avoids the first flow channel.

[0018] In the above scheme, by accommodating the heat exchange medium through the first flow channel, the temperature of the first battery cell can be regulated using the heat exchange medium, thereby improving the cycle performance of the first battery cell. The connection point between the bottom wall and the first beam and / or the second beam avoids the first flow channel, reducing damage to the first flow channel and improving the reliability of the connection between the bottom wall and the first beam and / or the second beam.

[0019] According to some embodiments of this application, the battery device further includes a first liquid inlet connector and a first liquid outlet connector, both of which are connected to the bottom wall and are respectively connected to a first flow channel; along a second direction, a first electrical component is located between the first liquid inlet connector and the first liquid outlet connector, and the second direction is perpendicular to the thickness direction of the bottom wall.

[0020] In the above scheme, the first liquid inlet connector and the first liquid outlet connector are respectively connected to the first flow channel. This facilitates connection to the pipeline for inputting the heat exchange medium via the first liquid inlet connector, allowing the heat exchange medium to be transported to the first flow channel. Similarly, it facilitates connection to the pipeline for outputting the heat exchange medium via the first liquid outlet connector, allowing the heat exchange medium in the first flow channel to be discharged. The first electrical component is located between the first liquid inlet connector and the first liquid outlet connector, resulting in a compact structure for the first liquid inlet connector, the first electrical component, and the first liquid outlet connector. This improves the space utilization rate inside the housing in the second direction, thereby increasing the energy density of the battery device.

[0021] According to some embodiments of this 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 a first liquid inlet connector; the first liquid outlet pipe is connected to a first liquid outlet connector; the high-voltage box is disposed inside the housing and on the bottom wall, and 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.

[0022] In the above scheme, the high-pressure box is located between the first inlet pipe and the first outlet pipe, which makes it easier to utilize the space inside the box in the second direction and improve the space utilization rate inside the box.

[0023] According to some embodiments of this application, 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 a first mounting space, and the angle between the first wall surface and the second wall surface is an obtuse angle.

[0024] In the above scheme, the angle between the first wall and the second wall is an obtuse angle, and the first installation space can have a large volume to accommodate the first electrical component and improve the space utilization rate inside the enclosure.

[0025] According to some embodiments of this application, cavities are formed inside both the first beam and the second beam.

[0026] In the above scheme, cavities are formed inside both the first beam and the second beam, which can reduce the weight of the first beam and the second beam. At the same time, it is convenient to absorb the force of the first battery cell and constrain the expansion and deformation of the first battery cell.

[0027] According to some embodiments of this application, the battery device further includes a second battery cell and a bracket. The second battery cell is disposed in the housing and arranged along a third direction with the first battery cell. The bracket is disposed between the first battery cell and the second battery cell and supports the second battery cell. The housing includes a bottom wall that supports the first battery cell, and the third direction is parallel to the thickness direction of the bottom wall.

[0028] In the above scheme, the bracket separates the first battery cell and the second battery cell, and the bracket carries the second battery cell to facilitate the assembly and positioning of the second battery cell.

[0029] According to some embodiments of this application, the battery device further includes a second expansion beam and a second electrical component. The second expansion beam is disposed on the bracket and divides the space of the housing 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 disposed in the second battery compartment and cooperates with the second expansion beam. The second electrical component is disposed in the second electrical compartment and is electrically connected to the second battery cell. The second expansion beam includes a third beam and a fourth beam connected at an angle, and a second mounting space is formed between the third beam and the fourth beam. The second mounting space is located in the second electrical compartment, and at least a portion of the second electrical component is mounted on the second expansion beam and housed in the second mounting space.

[0030] In the above scheme, the third beam and the fourth beam are set at an angle, which can enhance the overall strength of the second expansion beam, so as to constrain 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. By utilizing the second installation space, the internal structure of the box is compactly installed, improving the space utilization rate inside the box, and enabling the battery device to have a high energy density.

[0031] According to some embodiments of this application, the bracket has a first end, which extends beyond the first battery cell and the second battery cell along a first direction, 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.

[0032] In the above scheme, the first end extends beyond 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 components and the second electrical components and improves the space utilization of the bracket on both sides in the third direction.

[0033] According to some embodiments of this application, the housing includes a bottom wall that supports a first battery cell, a first battery compartment and a first electrical compartment that are sequentially distributed along a first direction that 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 support, the first electrical compartment is connected to a second electrical compartment, and the third direction is parallel to the thickness direction of the bottom wall.

[0034] In the above scheme, the first electrical compartment is connected to the second electrical compartment, which facilitates the installation of other components in the space beyond the support on the bottom wall, thereby improving the space utilization rate inside the box.

[0035] According to some embodiments of this application, the battery device further includes a high-voltage box disposed on the bottom wall, and the high-voltage box is disposed in the first electrical compartment and the second electrical compartment.

[0036] In the above scheme, the high-voltage box is set in the first electrical compartment and the second electrical compartment, which can improve the utilization rate of the space on the bottom wall that exceeds the support, and make the internal component structure of the box compact.

[0037] According to some embodiments of this application, the third beam cooperates with the second battery cell, and the third beam and / or the fourth beam is 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 being installed on either the third beam or the fourth beam, and the second battery management unit being installed on either the third beam or the fourth beam.

[0038] In the above scheme, 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 the constraint of the expansion deformation of the second battery cell through the second expansion beam. The second battery monitoring unit is used to monitor the battery status information such as 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.

[0039] According to some embodiments of this application, 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 wall of the third beam to form 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.

[0040] In the above scheme, the third beam cooperates with the second battery cell, and the large surface of the second battery monitoring unit is attached to the wall of the third beam forming the second installation space. The second battery monitoring unit and the third beam have a large connection area, which improves the connection stability between them. Furthermore, the short distance between the second battery monitoring unit and the second battery cell results in a shorter connection line between them. The second battery management unit is installed on the fourth beam and spaced apart from the second battery monitoring unit, which improves the utilization of the second installation space and reduces the risk of interference between the second battery management unit and the second battery monitoring unit.

[0041] According to some embodiments of this application, the third beam cooperates with the second battery cell, and the third beam and / or the fourth beam is 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 a second mounting space, and the angle between the third wall surface and the fourth wall surface is an obtuse angle.

[0042] In the above scheme, 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 the constraint of the expansion deformation of the second battery cell through the second expansion beam. 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 components and improve the space utilization rate inside the enclosure.

[0043] According to some embodiments of this application, a second flow channel is formed inside the support, which is used to contain the heat exchange medium; the position where the support is connected to the third beam and / or the fourth beam avoids the second flow channel.

[0044] In the above scheme, the heat exchange medium contained in the second flow channel can be used to regulate the temperature of the second battery cell, thereby improving the cycle performance of the second battery cell. Simultaneously, the support is located between the first and second battery cells, and the heat exchange medium within the support can also regulate the temperature of the first battery cell. The connection between the support and the third and / or fourth beams avoids the second flow channel, reducing damage to the second flow channel and improving the reliability of the connection between the support and the third and / or fourth beams.

[0045] According to some embodiments of this application, the battery device further includes a second liquid inlet connector and a second liquid outlet connector, both of which are connected to a bracket and are respectively connected to a second flow channel; both the second liquid inlet connector and the second liquid outlet connector are 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.

[0046] In the above scheme, the second liquid inlet and the second liquid outlet are respectively connected to the second flow channel. This facilitates connection to the pipe for inputting the heat exchange medium via the second liquid inlet, allowing the heat exchange medium to be transported to the second flow channel. Similarly, it facilitates connection to the pipe for outputting the heat exchange medium via the second liquid outlet, allowing the heat exchange medium in the second flow channel to be discharged. Along the third direction, the second liquid inlet and the second liquid outlet are located on the side of the support facing the bottom wall. The first electrical component is located between the second liquid inlet and the second outlet, resulting in a compact structure that improves the space utilization inside the housing in the second direction, thereby increasing the energy density of the battery device.

[0047] According to some embodiments of this 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 a second liquid inlet connector; the second liquid outlet pipe is connected to a second liquid outlet connector; the high-voltage box is disposed inside the housing, and the first battery cell and the second battery cell are electrically connected to the high-voltage box respectively. Along the second direction, the high-voltage box is located between the second liquid inlet pipe and the second liquid outlet pipe.

[0048] In the above scheme, the second inlet pipe and the second outlet pipe are located inside the first electrical compartment, and the high-voltage box is located between the second inlet pipe and the second outlet pipe, which facilitates the use of the space inside the box in the second direction and improves the space utilization rate inside the box.

[0049] According to some embodiments of this application, cavities are formed inside both the third beam and the fourth beam.

[0050] In the above scheme, cavities are formed inside 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 force of the second battery cell and constrain the expansion and deformation of the second battery cell.

[0051] Secondly, embodiments of this application also provide an electrical device, which includes a battery device according to any of the above embodiments, the battery device being used to provide electrical energy.

[0052] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0053] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0055] Figure 2 is a cross-sectional view of a battery device provided in some embodiments of this application;

[0056] Figure 3 is a cross-sectional view of a portion of the structure of a battery device provided in some embodiments of this application;

[0057] Figure 4 is a cross-sectional view of a battery device provided in some other embodiments of this application;

[0058] Figure 5 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0059] Figure 6 is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0060] Figure 7 is a cross-sectional view of a partial structure of a battery device provided in some other embodiments of this application;

[0061] Figure 8 is a partial structural schematic diagram of a battery device provided in some other embodiments of this application;

[0062] Figure 9 is a magnified view of part A in Figure 8;

[0063] Figure 10 is an exploded view of the structure of a battery device provided in some other embodiments of this application.

[0064] The accompanying drawings are not drawn to scale.

[0065] Labeling Explanation: 100 - Battery Unit; 10 - Housing; 10a - First Housing; 10b - Second Housing; 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 pressure box; 71-First liquid inlet connector; 72-First liquid outlet connector; 73-First liquid inlet pipe; 74-First liquid outlet pipe; 75-Second liquid inlet connector; 76-Second liquid outlet connector; 77-Second liquid inlet pipe; 78-Second liquid outlet pipe; 791-Main liquid inlet pipe; 792-Main liquid outlet 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

[0066] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings, are intended to cover non-exclusive inclusion. In the description of embodiments of this application, technical terms such as "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features.

[0068] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0072] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0073] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0074] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0075] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0076] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0077] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0078] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0079] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0080] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0081] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0082] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0083] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0084] In some embodiments, the positive electrode may be a positive electrode sheet, which 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.

[0085] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0086] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium with a silver-plated surface. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (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.).

[0087] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0088] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0089] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, or made of carbon, nickel, or titanium, etc.

[0090] In some embodiments, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0091] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in batteries. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0092] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0093] 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 ceramic. 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 separate component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0094] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0095] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0096] In some implementations, the electrode assembly is a stacked structure.

[0097] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0098] In some embodiments, the housing includes an end cap and a casing, the casing having an opening, and the end cap closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The casing may have one or more openings. The end cap may also be provided one or more times.

[0099] 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 via an adapter. The electrode terminal can be located on the end cap or on the housing.

[0100] In some implementations, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cells.

[0101] 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, it protects the electrode assembly and prevents leaks such as electrolyte leakage. When the housing is a non-sealed structure, it protects the electrode assembly, and a sealing bag may be included between the housing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating material or an aluminum-plastic film.

[0102] 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. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. There are no particular limitations in the embodiments of this application.

[0103] The development of battery technology must take into account multiple design factors, such as reliability, discharge capacity, charge / discharge rate and other performance parameters. In addition, the energy density of the battery also needs to be considered.

[0104] In some embodiments, the battery device includes a housing and at least one battery cell assembly disposed within the housing. To constrain the expansion and deformation of the battery cell assembly, an expansion beam is typically provided within the housing. To improve the strength of the expansion beam, the beam is relatively large, occupying a significant amount of space, resulting in low space utilization within the housing and a low energy density of the battery device.

[0105] In view of this, in order to solve the problem of low space utilization inside the housing, resulting in low energy density of the battery device, this application provides a battery device including a housing, a first expansion beam, a first battery cell, and a first electrical component. The first expansion beam is disposed inside the housing and divides the space inside the housing 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. The first expansion beam includes a first beam and a second beam connected at an angle, forming a first mounting space between the first beam and the second beam. The first mounting space is located within the first electrical compartment, and at least a portion of the first electrical component is mounted on the first expansion beam and housed within the first mounting space. The first electrical component and the first expansion beam have a compact structure, resulting in high space utilization inside the housing and a high energy density for the battery device.

[0106] In such a battery device, the first beam and the second beam are set at an angle, which can enhance the overall strength of the first expansion beam so as to constrain 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, which improves the utilization rate of the first installation space, makes the internal structure of the box compact, improves the internal space utilization rate of the box, and makes the battery device have a high energy density.

[0107] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery device disclosed in this application.

[0108] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0109] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0110] Please refer to Figure 1, which is a schematic diagram of the vehicle structure provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0111] The vehicle 1000 may also 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, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0112] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0113] Please refer to Figure 2, which is a cross-sectional view of a battery device provided in some embodiments of this application. This application provides a battery device 100, which includes a housing 10, a first expansion beam 20, a first battery cell 31, and a first electrical component 41. The first expansion beam 20 is disposed within the housing 10 and divides the space within the housing 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, forming a first mounting space 23 between the first beam 21 and the second beam 22, the first mounting space 23 being located within the first electrical compartment 12, and at least a portion of the first electrical component 41 being mounted on the first expansion beam 20 and housed within the first mounting space 23.

[0114] The housing 10 is used to provide a storage space in which the first battery cell 31 is housed.

[0115] The first expansion beam 20 is disposed within the accommodating space of the housing 10, and divides the accommodating 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 a 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 be parallel to the width direction of the battery device 100.

[0116] 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 may include, but are not limited to, the first electrical component 41. The electrical components of the battery device 100 may include, but are not limited to, a battery management unit, a battery monitoring unit, a high-voltage box, etc.

[0117] 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. The first electrical component 41 is also used for real-time monitoring, control, and protection of the first battery cell 31. For example, the first electrical component 41 may include, but is not limited to, a first battery monitoring unit, a first battery management unit, etc.

[0118] The first expansion beam 20 is used to cooperate with the first battery cell 31 to constrain the expansion and deformation of the first battery cell 31.

[0119] In some embodiments, the battery device 100 may further include a third expansion beam 51, which is disposed inside the housing 10. The third expansion beam 51 and the first expansion beam 20 may be spaced apart along a first direction X. The first battery cell 31 is disposed between the third expansion beam 51 and the first expansion beam 20. The first direction X may 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.

[0120] 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.

[0121] 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 can be integrally extruded.

[0122] 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 can be greater than or equal to 90°, so that the first installation space 23 can have a large volume while ensuring that the first expansion beam 20 has high overall strength.

[0123] The first electrical component 41 and the first expansion beam 20 can be installed in various ways, such as threaded connection, welding connection, snap-fit ​​connection, etc.

[0124] When the first electrical component 41 is assembled with the first expansion beam 20, a portion of the first electrical component 41 may be located within the first mounting space 23, or the entire first electrical component 41 may be located within the first mounting space 23.

[0125] According to the battery device 100 of the present application embodiment, the first beam 21 and the second beam 22 are arranged at an angle, which can enhance the overall strength of the first expansion beam 20 so as to constrain the expansion deformation of the first battery cell 31; at least part of the first electrical component 41 is installed in the first installation space 23 formed by the first beam 21 and the second beam 22, thereby improving the utilization rate of the first installation space 23, making the internal structure of the housing 10 compact, improving the internal space utilization rate of the housing 10, and making the battery device 100 have a high energy density.

[0126] Please refer to Figure 2. According to some embodiments of this application, the housing 10 includes a bottom wall 13, which supports a first battery cell 31. A 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.

[0127] The bottom wall 13 is the wall of the housing 10 used to support the first battery cell 31, and the first battery cell 31 is disposed on the bottom wall 13.

[0128] There are several ways in which the first beam 21 can be combined 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 fitted to the large surface of the first battery cell 31.

[0129] In some embodiments, the first beam 21 may be connected to the bottom wall 13, or the second beam 22 may be connected to the bottom wall 13, or the first beam 21 and the second beam 22 may be connected to the bottom wall 13 respectively.

[0130] The connection between the first beam 21 and / or the second beam 22 and the bottom wall 13 can be achieved in various ways, such as welding, bonding, snap-fitting, threaded connection, etc. In some embodiments, the first beam 21 and / or the second beam 22 are welded to the bottom wall 13, so that the first beam 21 and / or the second beam 22 are firmly connected to the bottom wall 13.

[0131] Optionally, the second beam 22 may be located at one end of the first beam 21 near the bottom wall 13, and the second beam 22 and the first beam 21 are respectively connected to the bottom wall 13.

[0132] In the above scheme, 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 the constraint of the expansion deformation of the first battery cell 31 by the first expansion beam 20.

[0133] Referring to Figure 2, according to some embodiments of this application, the battery device 100 further includes a high-voltage box 60, which is disposed in the first electrical compartment 12. The high-voltage box 60 is electrically connected to the first battery cell 31. The high-voltage box 60, the first expansion beam 20 and the first battery cell 31 are distributed sequentially along the first direction X. The first direction X is perpendicular to the thickness direction of the bottom wall 13.

[0134] The high-voltage box 60 can be a device for distributing high-voltage electrical energy among individual battery cells in the battery device 100 and for overload and short-circuit protection of the high-voltage circuit.

[0135] The high-voltage box 60 is located inside the first electrical compartment 12 and can be electrically connected to the first electrical component 41.

[0136] 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 distributed sequentially along the first direction X.

[0137] The first direction X is perpendicular to the thickness direction of the bottom wall 13, and the first direction X can be parallel to the length direction or the width direction of the battery device 100.

[0138] In the above scheme, the high-voltage box 60, the first expansion beam 20 and the first battery cell 31 are arranged in sequence to make use of the space in the first direction X inside the box 10, so that the battery device 100 has a compact structure.

[0139] Please refer to Figure 3, which is a cross-sectional view of a portion of the structure of a battery device provided in some embodiments of this application. According to some embodiments of this 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 either the first beam 21 or the second beam 22, and the first battery management unit 412 is installed on either the first beam 21 or the second beam 22.

[0140] The first battery monitoring unit 411 is used to monitor battery status information such as voltage and temperature of the first battery cell 31.

[0141] In some embodiments, the battery device 100 further includes a first sampling component, which is electrically connected to the first battery monitoring unit 411 and to the first battery cell 31, and collects voltage signals, temperature signals, or current signals of the first battery cell 31.

[0142] The first battery monitoring unit 411 can be installed on the first beam 21, or the first battery monitoring unit 411 can be installed on the second beam 22.

[0143] The first battery management unit 412 is used to monitor, control and protect the first battery cell 31 in real time, and the first battery monitoring unit 411 can be electrically connected to the first battery management unit 412.

[0144] The first battery management unit 412 can be installed on the first beam 21, or the first battery management unit 412 can be installed on the second beam 22.

[0145] In the above scheme, the first battery monitoring unit 411 is installed 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 installed on the first beam 21 or the second beam 22 to facilitate the assembly and positioning of the first battery management unit 412.

[0146] Referring to Figure 3, according to some embodiments of this application, the first battery monitoring unit 411 is installed on the first beam 21, and the large surface of the first battery monitoring unit 411 is attached to the wall surface of the first beam 21 forming the first installation space 23; the first battery management unit 412 is installed on the second beam 22, and is spaced apart from the first battery monitoring unit 411.

[0147] The "large surface" of the first battery monitoring unit 411 refers to the surface with the larger surface area of ​​the first battery monitoring unit 411.

[0148] The first beam 21 is formed by the wall of the first installation space 23, which is the wall of the first beam 21 away from the first battery cell 31, and this wall can be set towards the first electrical component 41.

[0149] In some embodiments, the first battery monitoring unit 411 may be connected to the first beam 21 by bolts or threads to facilitate the assembly and disassembly of the first battery monitoring unit 411.

[0150] In some embodiments, the first battery management unit 412 may be connected to the second beam 22 by bolts or threads to facilitate the assembly and disassembly of the first battery management unit 412.

[0151] The first battery management unit 412 and the first battery monitoring unit 411 are arranged at intervals. For example, as shown in Figure 3, the first battery management unit 412 can be arranged at intervals with the first battery monitoring unit 411 along 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; or, for another example, the first battery management unit 412 can be arranged at intervals with the first battery monitoring unit 411 along the thickness direction of the bottom wall 13.

[0152] In the above scheme, 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 of the first installation space 23 formed by the first beam 21. 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 battery cell 31. In addition, the distance between the first battery monitoring unit 411 and the first battery cell 31 is short, which makes the connection line between the first battery monitoring unit 411 and the first battery cell 31 shorter. The first battery management unit 412 is installed on the second beam 22 and is spaced apart from the first battery monitoring unit 411, which facilitates the utilization of the first installation space 23 and reduces the interference risk between the first battery management unit 412 and the first battery monitoring unit 411.

[0153] Referring to Figure 3, according to some embodiments of this application, a first flow channel 131 is formed inside the bottom wall 13, which is used to contain the heat exchange medium; the position where the bottom wall 13 is connected to the first beam 21 and / or the second beam 22 avoids the first flow channel 131.

[0154] The bottom wall 13 has an internally hollow structure, and the first flow channel 131 is formed inside the bottom wall 13 to accommodate the heat exchange medium.

[0155] The bottom wall 13 can be integrally extruded to form a first flow channel 131 inside the bottom wall 13, which facilitates processing and manufacturing. During the extrusion molding process of the bottom wall 13, reinforcing ribs can be formed inside the bottom wall 13 to improve the overall strength of the bottom wall 13.

[0156] In some embodiments, the bottom wall 13 is welded to the first beam 21 and / or the second beam 22 so that the bottom wall 13 is securely connected to the first beam 21 and / or the second beam 22.

[0157] When the bottom wall 13 is connected to the first beam 21, the connection point between the bottom wall 13 and the first beam 21 avoids the first flow channel 131. When the bottom wall 13 is connected to the second beam 22, the connection point between the bottom wall 13 and the second beam 22 avoids the first flow channel 131. When the bottom wall 13 is connected to both the first beam 21 and the second beam 22, the connection point between the bottom wall 13 and the first beam 21 avoids the first flow channel 131, and the connection point between the bottom wall 13 and the second beam 22 avoids the second flow channel.

[0158] The heat exchange medium mentioned in this application may be water, alcohol or other liquid mixtures.

[0159] The bottom wall 13 can be made of a material with good thermal conductivity, such as aluminum, aluminum alloy, steel, etc.

[0160] In the above scheme, by accommodating the heat exchange medium through the first flow channel 131, the temperature of the first battery cell 31 can be regulated by the heat exchange medium, thereby improving the cycle performance of the first battery cell 31. The connection position between the bottom wall 13 and the first beam 21 and / or the second beam 22 avoids the first flow channel 131, which can reduce 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.

[0161] According to some embodiments of this application, the battery device 100 further includes a first liquid inlet connector 71 and a first liquid outlet connector 72, both of which are connected to the bottom wall 13 and are respectively connected to the first flow channel 131; along the second direction Y, the first electrical component 41 is located between the first liquid inlet connector 71 and the first liquid outlet connector 72, and the second direction Y is perpendicular to the thickness direction of the bottom wall 13.

[0162] In some embodiments, the bottom wall 13 has a first through hole and a second through hole. The first through hole connects the first flow channel 131 and the external environment of the first flow channel 131, and the second through hole connects the first flow channel 131 and the external environment of the first flow channel 131. A first liquid inlet connector 71 is disposed in the first through hole and is sealed to the bottom wall 13 to reduce the risk of heat exchange medium leakage from the connection between the first liquid inlet connector 71 and the bottom wall 13. A first liquid outlet connector 72 is disposed in the second through hole and is sealed to the bottom wall 13 to reduce the risk of heat exchange medium leakage from the connection between the first liquid outlet connector 72 and the bottom wall 13.

[0163] The first liquid inlet connector 71 and the first liquid outlet connector 72 are spaced apart along the second direction Y to allow the heat exchange medium to have a longer flow path within the first flow channel 131. For example, the first liquid inlet connector 71 and the first liquid outlet connector 72 can be located at both ends of the bottom wall 13 in the second direction Y to allow the heat exchange medium to have a longer flow path within the first flow channel 131, thereby improving the heat exchange effect between the heat exchange medium and the first battery cell 31.

[0164] In the above scheme, the first liquid inlet connector 71 and the first liquid outlet connector 72 are respectively connected to the first flow channel 131. This facilitates connection to the pipeline for inputting the heat exchange medium via the first liquid inlet connector 71, so as to transport the heat exchange medium to the first flow channel 131. It also facilitates connection to the pipeline for outputting the heat exchange medium via the first liquid outlet connector 72, so as 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 housing 10 in the second direction Y, so as to improve the energy density of the battery device 100.

[0165] Referring to Figure 3, according to some embodiments of this 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 a first liquid inlet connector 71; the first liquid outlet pipe 74 is connected to a first liquid outlet connector 72; the high-voltage box 60 is disposed inside the housing 10 and on the bottom wall 13. 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.

[0166] The first liquid inlet pipe 73 is a pipe used to input 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.

[0167] The first outlet pipe 74 is a pipe for outputting the heat exchange medium from the first flow channel 131. One end of the first outlet pipe 74 is connected to the first outlet connector 72, and the other end of the first outlet pipe 74 is used to connect to a container for storing the heat exchange medium.

[0168] The first liquid inlet pipe 73 and the first liquid outlet pipe 74 are respectively connected to the first flow channel 131 so that the heat exchange medium can circulate in the first flow channel 131 and improve the heat exchange effect.

[0169] At least a portion of the high-voltage box 60 can be housed within the first electrical compartment 12. The high-voltage box 60 and the bottom wall 13 can be connected by bolts and threads to facilitate the assembly and disassembly of the high-voltage box 60.

[0170] The first inlet pipe 73 and the first outlet pipe 74 are arranged at intervals along the second direction Y. The first inlet pipe 73 and the first outlet pipe 74 can have a large gap to allow the heat exchange medium to have a longer flow path in the first flow channel 131. For example, the first inlet pipe 73 and the first outlet pipe 74 are located at both ends of the bottom wall 13 in the second direction Y.

[0171] In the above scheme, the high-pressure box 60 is located between the first liquid inlet pipe 73 and the first liquid outlet pipe 74, which facilitates the use of the space inside the box 10 in the second direction Y and improves the space utilization rate inside the box 10.

[0172] Referring to Figure 2, according to some embodiments of this application, the first beam 21 has a first wall surface 211 facing away from the first battery cell 31, and 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 form 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.

[0173] In some embodiments, the second wall surface 221 may be arranged parallel to the bottom wall 13, and the first wall surface 211 may be arranged obliquely to the thickness direction of the bottom wall 13.

[0174] The angle θ1 between the first wall surface 211 and the second wall surface 221 is an obtuse angle, and the opening of the first installation space 23 can be relatively large.

[0175] In the above scheme, the angle between the first wall 211 and the second wall 221 is an obtuse angle, and the first installation space 23 can have a large volume to accommodate the first electrical component 41 and improve the space utilization rate inside the housing 10.

[0176] According to some embodiments of this application, cavities are formed inside both the first beam 21 and the second beam 22.

[0177] The first beam 21 can be extruded and molded. At least one reinforcing rib can be provided in the cavity of the first beam 21, and the reinforcing rib divides the cavity into multiple chambers.

[0178] The second beam 22 can be extruded and molded. At least one reinforcing rib can be provided in the cavity of the second beam 22, and the reinforcing rib divides the cavity into multiple chambers.

[0179] In the above scheme, cavities are formed inside the first beam 21 and the second beam 22, which can reduce the weight of the first beam 21 and the second beam 22. At the same time, it is convenient to absorb the force of the first battery cell 31 and constrain the expansion and deformation of the first battery cell 31.

[0180] Please refer to Figures 4 to 6. Figure 4 is a cross-sectional view of a battery device provided in some embodiments of this application, Figure 5 is an exploded view of the structure of a battery device provided in some embodiments of this application, and Figure 6 is a partial structural diagram of a battery device provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a second battery cell 32 and a support 80. The second battery cell 32 is disposed inside the housing 10 and arranged along the third direction Z with the first battery cell 31. The support 80 is disposed between the first battery cell 31 and the second battery cell 32, and the support 80 supports the second battery cell 32. The housing 10 includes a bottom wall 13, which supports the first battery cell 31, and the third direction Z is parallel to the thickness direction of the bottom wall 13.

[0181] Both the second battery cell 32 and the first battery cell 31 are located inside the housing 10. 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 along the third direction Z. For example, when the third direction Z is parallel to the vertical 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.

[0182] 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.

[0183] The bottom wall 13 is used to support the first battery cell 31 so as to facilitate the positioning of the first battery cell 31.

[0184] In some embodiments, the bracket 80 may be arranged parallel to the bottom wall 13.

[0185] In the above scheme, the bottom wall 13 supports 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 supports the second battery cell 32 to facilitate the assembly and positioning of the second battery cell 32.

[0186] Referring to Figure 4, according to some embodiments of this 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 support 80 and divides the space of the housing 10 on the side of the support 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. The second expansion beam 90 includes a third beam 91 and a fourth beam 92 connected at an angle, forming a second mounting space 93 between the third beam 91 and the fourth beam 92. The second mounting space 93 is located in the second electrical compartment 15. At least a portion of the second electrical component 42 is mounted on the second expansion beam 90 and accommodated in the second mounting space 93.

[0187] The second expansion beam 90 is disposed on the bracket 80. The connection between the second expansion beam 90 and the bracket 80 can be in various ways, such as welding, snap-fit, riveting, threaded connection, etc. In some embodiments, the second expansion beam 90 is welded to the bracket 80 to ensure a firm connection between the second expansion beam 90 and the bracket 80.

[0188] The second expansion beam 90 can absorb the force of the second battery cell 32 and is used to constrain the expansion deformation of the second battery cell 32.

[0189] The second expansion beam 90 divides the space inside the housing 10 located on the support 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.

[0190] 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, which may include, but are not limited to, the second electrical component 42.

[0191] 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. 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 may include, but is not limited to, a second battery monitoring unit, a second battery management unit, etc.

[0192] In some embodiments, the battery device 100 may further include a fourth expansion beam 52, which is disposed within the housing 10. The fourth expansion beam 52 and the second expansion beam 90 may be spaced apart along a 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 larger surface of the second battery cell 32, where the larger surface of the second battery cell 32 refers to the surface with the larger surface area.

[0193] The second expansion beam 90 has a certain strength, and the material of the second expansion beam 90 can be metal, such as aluminum, aluminum alloy, steel, etc.

[0194] The third beam 91 and the fourth beam 92 are two components that constitute the second expansion beam 90. The third beam 91 and the fourth beam 92 can be integrally formed, for example, the second expansion beam 90 can be integrally extruded.

[0195] The angle between the third beam 91 and the fourth beam 92 can be an acute angle, a right angle, or an obtuse angle. Optionally, the angle between the third beam 91 and the fourth beam 92 can be greater than or equal to 90°, and the second installation space 93 can have a larger volume while ensuring that the second expansion beam 90 has high overall strength.

[0196] The second electrical component 42 and the second expansion beam 90 can be installed in various ways, such as threaded connection, welding connection, snap-fit ​​connection, etc.

[0197] When the second electrical component 42 is assembled with the second expansion beam 90, a portion of the second electrical component 42 may be located within the second mounting space 93, or the entire second electrical component 42 may be located within the second mounting space 93.

[0198] In the above scheme, the third beam 91 and the fourth beam 92 are set at an angle, which can enhance the overall strength of the second expansion beam 90, so as to constrain the expansion deformation of the second battery cell 32; at least part of the second electrical component 42 is installed in the second installation space 93 formed by the third beam 91 and the fourth beam 92. By utilizing the second installation space 93, the internal structure of the housing 10 is compactly installed, improving the space utilization rate inside the housing 10, and enabling the battery device 100 to have a high energy density.

[0199] Referring to Figure 4, according to some embodiments of this application, the bracket 80 has a first end 81 extending beyond the first battery cell 31 and the second battery cell 32 along a first direction X. The first direction X is perpendicular to a 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.

[0200] The first end 81 can be one end of the bracket 80 located in the first direction X. In the direction from the first battery compartment 11 to the second electrical compartment 15, the first end 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 81.

[0201] In some embodiments, the orthographic projection of the second expansion beam 90 at least partially overlaps with the orthographic projection of the first expansion beam 20 on the same projection plane perpendicular to the third direction Z. Optionally, the orthographic projection of the second expansion beam 90 completely overlaps with the orthographic projection of the first expansion beam 20 on the same projection plane perpendicular to the third direction Z.

[0202] In the above scheme, the first end 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 81 in the third direction Z, which facilitates the layout of the first electrical component 41 and the second electrical component 42 and improves the space utilization rate of the bracket 80 on both sides in the third direction Z.

[0203] Referring to Figure 4, according to some embodiments of this application, the housing 10 includes a bottom wall 13, which carries a first battery cell 31. A first battery compartment 11 and a first electrical compartment 12 are sequentially distributed along a first direction X, which 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 support 80. The first electrical compartment 12 is connected to the second electrical compartment 15. The third direction Z is parallel to the thickness direction of the bottom wall 13.

[0204] The bottom wall 13 is used to support the first battery cell 31. The first battery cell 31 can be bonded to the bottom wall 13 to achieve the assembly and positioning of the first battery cell 31.

[0205] In some embodiments, the housing 10 further includes a first sidewall 16 and a second sidewall 17, which are spaced apart along a first direction X. The first sidewall 16 and the second sidewall 17 are located at opposite ends of the bottom wall 13 in the first direction. One end of the first sidewall 16 is connected to the bottom wall 13, and one end of the second sidewall 17 is connected to the bottom wall 13. A first electrical component 41, a first expansion beam 20, and a first battery cell 31 are all disposed between the first sidewall 16 and the second sidewall 17. The first expansion beam 20 is closer to the first sidewall 16 than the first battery cell 31. The first sidewall 16, the first expansion beam 20, and the bottom wall 13 form a 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 support 80, so that there is a gap between the support 80 and the first sidewall 16. The first electrical compartment 12 and the second electrical compartment 15 are connected.

[0206] When the first electrical compartment 12 is connected to the second electrical compartment 15, the portion of the bottom wall 13 that extends beyond the support 80 has a large space in the third direction Z, which can accommodate more electrical components and utilize the space inside the housing 10 in the third direction Z.

[0207] In the above scheme, the first electrical compartment 12 is connected to the second electrical compartment 15, which facilitates the installation of other components in the space of the bottom wall 13 that extends beyond the support 80, thereby improving the space utilization rate inside the box 10.

[0208] Referring to Figure 4, according to some embodiments of this application, the battery device 100 further includes a high-voltage box 60, which is disposed on the bottom wall 13 and in the first electrical compartment 12 and the second electrical compartment 15.

[0209] The high-voltage box 60 is disposed in the first electrical compartment 12 and the second electrical compartment 15. The high-voltage box 60 extends beyond the surface of the bracket 80 away from the bottom wall 13 in the third direction Z. Larger electrical components can be disposed in the third direction Z to reduce the space occupied in the first direction X.

[0210] In the above scheme, the high-voltage box 60 is set in the first electrical compartment 12 and the second electrical compartment 15, which can improve the utilization rate of the space of the bottom wall 13 beyond the bracket 80, and make the internal component structure of the box 10 compact.

[0211] Please refer to Figure 4, and further refer to Figure 7, which is a cross-sectional view of a portion of the structure of a battery device provided in some embodiments of this application. According to some embodiments of this 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 being installed on either the third beam 91 or the fourth beam 92, and the second battery management unit 422 being installed on either the third beam 91 or the fourth beam 92.

[0212] There are several ways in which the third beam 91 can be combined 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 fitted to the large surface of the second battery cell 32.

[0213] In some embodiments, the third beam 91 may be connected to the bracket 80, or the fourth beam 92 may be connected to the bracket 80, or the third beam 91 and the fourth beam 92 may be connected to the bracket 80 respectively.

[0214] Optionally, the fourth beam 92 may be located at one end of the third beam 91 near the support 80, and the fourth beam 92 and the third beam 91 are respectively connected to the support 80.

[0215] The connection between the third beam 91 and / or the fourth beam 92 and the bracket 80 can be achieved in various ways, such as welding, bonding, snap-fitting, 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 connection between the third beam 91 and / or the fourth beam 92 and the bracket 80 is firm.

[0216] The second battery monitoring unit 421 is used to monitor battery status information such as voltage and temperature of the second battery cell 32.

[0217] In some embodiments, the battery device 100 further includes a second sampling component, which is electrically connected to the second battery monitoring unit 421 and the second battery cell 32, and collects voltage signals, temperature signals, or current signals of the second battery cell 32.

[0218] The second battery monitoring unit 421 can be installed on the third beam 91, or the second battery monitoring unit 421 can be installed on the fourth beam 92.

[0219] The second battery management unit 422 is used for real-time monitoring, control and protection of the second battery cell 32, and the second battery monitoring unit 421 can be electrically connected to the second battery management unit 422.

[0220] The second battery management unit 422 can be installed on the third beam 91, or the second battery management unit 422 can be installed on the fourth beam 92.

[0221] In the above scheme, 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 the constraint of the expansion deformation of the second battery cell 32 by the second expansion beam 90. The second battery monitoring unit 421 is used to monitor the battery status information such as 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.

[0222] Referring to Figure 7, according to some embodiments of this 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 wall of the third beam 91 to form 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.

[0223] The "large surface" of the second battery monitoring unit 421 refers to the surface with the larger surface area of ​​the second battery monitoring unit 421.

[0224] The formation of the third beam 91 refers to the wall surface of the second installation space 93, which is away from the second battery cell 32 and can be positioned towards the second electrical component 42.

[0225] In some embodiments, the second battery monitoring unit 421 may be connected to the third beam 91 by bolts or threads to facilitate the assembly and disassembly of the second battery monitoring unit 421.

[0226] In some embodiments, the second battery management unit 422 may be connected to the fourth beam 92 by bolts or threads to facilitate the assembly and disassembly of the second battery management unit 422.

[0227] The second battery management unit 422 and the second battery monitoring unit 421 are arranged at intervals. For example, the second battery management unit 422 can be arranged at intervals with the second battery monitoring unit 421 along the second direction Y. Or, for example, the second battery management unit 422 can be arranged at intervals with the second battery monitoring unit 421 along the third direction Z.

[0228] In the above scheme, the third beam 91 cooperates with the second battery cell 32, and the large surface of the second battery monitoring unit 421 is attached to the wall of the second installation space 93 formed by the third beam 91. The second battery monitoring unit 421 and the third beam 91 have a large connection area, which can improve the connection stability between the second battery monitoring unit 421 and the third beam 91. In addition, the distance between the second battery monitoring unit 421 and the second battery cell 32 is short, which makes the connection line between the second battery monitoring unit 421 and the second battery cell 32 shorter. 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 facilitates the utilization of the second installation space 93 and reduces the interference risk between the second battery management unit 422 and the second battery monitoring unit 421.

[0229] Referring to Figure 4, according to some embodiments of this 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 surface 911 facing away from the second battery cell 32, and the fourth beam 92 has a fourth wall surface 921 facing away from the bracket 80. The third wall surface 911 and the fourth wall surface 921 form a second mounting space 93, and the angle θ2 between the third wall surface 911 and the fourth wall surface 921 is an obtuse angle.

[0230] The third beam 91 and / or the fourth beam 92 are connected to the bracket 80 so that the second expansion beam 90 is securely connected to the bracket 80.

[0231] In some embodiments, the fourth wall surface 921 may be arranged parallel to the bracket 80, the third wall surface 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.

[0232] 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 relatively large.

[0233] In the above scheme, 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 the constraint of the expansion deformation of the second battery cell 32 by the second expansion beam 90. The angle θ2 between the third wall surface 911 and the fourth wall surface 921 is an obtuse angle, and the second installation space 93 can have a large volume to accommodate the second electrical component 42 and improve the space utilization rate inside the housing 10.

[0234] Referring to Figure 7, according to some embodiments of this application, a second flow channel 82 is formed inside the support 80, which is used to contain the heat exchange medium; the position where the support 80 is connected to the third beam 91 and / or the fourth beam 92 avoids the second flow channel 82.

[0235] The support 80 has a hollow structure, and the second flow channel 82 is formed inside the support 80 to accommodate the heat exchange medium.

[0236] The support 80 can be integrally extruded to form a second flow channel 82 inside the support 80, which facilitates processing and manufacturing. During the extrusion molding process of the support 80, reinforcing ribs can be formed inside the support 80 to improve the overall strength of the support 80.

[0237] 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 securely connected to the third beam 91 and / or the fourth beam 92.

[0238] When the support 80 is connected to the third beam 91, the connection point between the support 80 and the third beam 91 avoids the second flow channel 82. Similarly, when the support 80 is connected to the fourth beam 92, the connection point between the support 80 and the fourth beam 92 avoids the second flow channel 82.

[0239] The bracket 80 can be made of a material with good thermal conductivity, such as aluminum, aluminum alloy, or steel.

[0240] In the above scheme, the heat exchange medium contained in the second flow channel 82 can be used to regulate the temperature of the second battery cell 32, thereby improving the cycle performance of the second battery cell 32. Simultaneously, the support 80 is located between the first battery cell 31 and the second battery, and the heat exchange medium within the support 80 can also regulate the temperature of the first battery cell 31. The connection point between the support 80 and the third beam 91 and / or the fourth beam 92 avoids the second flow channel 82, reducing damage to the second flow channel 82 and improving the reliability of the connection between the support 80 and the third beam 91 and / or the fourth beam 92.

[0241] Referring to Figure 7, according to some embodiments of this application, the battery device 100 further includes a second liquid inlet connector 75 and a second liquid outlet connector 76. Both the second liquid inlet connector 75 and the second liquid outlet connector 76 are connected to the bracket 80, and both the second liquid inlet connector 75 and the second liquid outlet connector 76 are connected to the second flow channel 82. Both the second liquid inlet connector 75 and the second liquid outlet connector 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 connector 75 and the second liquid outlet connector 76. The second direction Y is perpendicular to the third direction Z.

[0242] In some embodiments, a third through hole and a fourth through hole are provided on the side of the support 80 facing the bottom wall 13. The third through hole connects to the external environment of the second flow channel 82 and the fourth through hole. A second liquid inlet connector 75 is disposed in the third through hole and is sealed to the support 80 to reduce the risk of heat exchange medium leakage from the connection between the second liquid inlet connector 75 and the support 80. A second liquid outlet connector 76 is disposed in the fourth through hole and is sealed to the support 80 to reduce the risk of heat exchange medium leakage from the connection between the second liquid outlet connector 76 and the support 80.

[0243] The second liquid inlet connector 75 and the second liquid outlet connector 76 are spaced apart along the second direction Y to allow the heat exchange medium to have a longer flow path within the second flow channel 82. For example, the second liquid inlet connector 75 and the second liquid outlet connector 76 can be located at both ends of the support 80 in the second direction Y to allow the heat exchange medium to have a longer flow path within the second flow channel 82, thereby improving the heat exchange effect between the heat exchange medium and the second battery cell 32.

[0244] In the above scheme, the second liquid inlet connector 75 and the second liquid outlet connector 76 are respectively connected to the second flow channel 82. This facilitates connection to the pipeline for inputting the heat exchange medium via the second liquid inlet connector 75, so as to transport the heat exchange medium to the second flow channel 82. It also facilitates connection to the pipeline for outputting the heat exchange medium via the second liquid outlet connector 76, so as to discharge the heat exchange medium in the second flow channel 82. Along the third direction Z, the second liquid inlet connector 75 and the second liquid outlet connector 76 are located on the side of the support 80 facing the bottom wall 13. The first electrical component 41 is located between the second liquid inlet connector 75 and the second connector, so that the structure of the second liquid inlet connector 75, the first electrical component 41 and the second liquid outlet connector 76 is compact, improving the space utilization rate inside the housing 10 in the second direction Y, so as to improve the energy density of the battery device 100.

[0245] Please refer to Figure 7, and further refer to Figures 8 and 9. Figure 8 is a partial structural schematic diagram of the battery device provided in some embodiments of this application, and Figure 9 is a partial enlarged view of section A in Figure 8. According to some embodiments of this 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 a second liquid inlet connector 75; the second liquid outlet pipe 78 is connected to a second liquid outlet connector 76; the high-voltage box 60 is disposed inside the housing 10, and the first battery cell 31 and the second battery cell 32 are electrically connected to the high-voltage box 60 respectively. 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.

[0246] For ease of assembly, the second inlet pipe 77 and the second outlet pipe 78 are located on the side of the bracket 80 facing the bottom wall 13.

[0247] The second inlet pipe 77 is a pipe used to input the heat exchange medium into the second flow channel 82. One end of the second inlet pipe 77 is connected to the second inlet connector 75, and the other end of the second inlet pipe 77 is used to connect to a container for storing the heat exchange medium.

[0248] The second outlet pipe 78 is a pipe for outputting the heat exchange medium from the second flow channel 82. One end of the second outlet pipe 78 is connected to the second outlet connector 76, and the other end of the second outlet pipe 78 is used to connect to a container for storing the heat exchange medium.

[0249] The second inlet pipe 77 and the second outlet pipe 78 are respectively connected to the second flow channel 82 so that the heat exchange medium can circulate in the second flow channel 82 and improve the heat exchange effect.

[0250] In some embodiments, to facilitate the transport of the heat exchange medium, referring to FIG9, the battery device 100 further includes an inlet manifold 791 and an outlet manifold 792. A first inlet pipe 73 and a second inlet pipe 77 are respectively connected to the inlet manifold 791, and a first outlet pipe 74 and a second outlet pipe 78 are respectively connected to the outlet manifold 792. Optionally, the first inlet pipe 73 and the second inlet pipe 77 may be located at the same end of the bottom wall 13 in the second direction Y, and the first outlet pipe 74 and the second outlet pipe 78 may be located at the same end of the bottom wall 13 in the second direction Y.

[0251] At least a portion of the high-voltage box 60 is disposed within the first electrical compartment 12, and along the second direction Y, the high-voltage box 60 is located between the second inlet pipe 77 and the second outlet pipe 78.

[0252] The second inlet pipe 77 and the second outlet pipe 78 are arranged at intervals along the second direction Y. The second inlet pipe 77 and the second outlet pipe 78 can have a large gap to allow the heat exchange medium to have a longer flow path in the second flow channel 82. For example, the second inlet pipe 77 and the second outlet pipe 78 can be arranged at both ends of the support 80 in the second direction Y.

[0253] In the above scheme, the second inlet pipe 77 and the second outlet pipe 78 are located inside the first electrical compartment 12, and the high-voltage box 60 is located between the second inlet pipe 77 and the second outlet pipe 78, which facilitates the use of the space inside the box 10 in the second direction Y and improves the space utilization rate inside the box 10.

[0254] According to some embodiments of this application, cavities are formed inside both the third beam 91 and the fourth beam 92.

[0255] The third beam 91 can be extruded and molded. At least one reinforcing rib can be provided in the cavity of the third beam 91, and the reinforcing rib divides the cavity into multiple chambers.

[0256] The fourth beam 92 can be extruded and molded. At least one reinforcing rib can be provided in the cavity of the fourth beam 92, and the reinforcing rib divides the cavity into multiple chambers.

[0257] In the above scheme, cavities are formed inside the third beam 91 and the fourth beam 92, which can reduce the weight of the third beam 91 and the fourth beam 92. At the same time, it is convenient to absorb the force of the second battery cell 32 and constrain the expansion and deformation of the second battery cell 32.

[0258] Please refer to Figure 10, which is an exploded view of the structure of a battery device provided in some embodiments of this application. According to some embodiments of this application, the housing 10 includes a first housing 10a and a second housing 10b, which are fastened together to form an accommodating space, in which a first battery cell 31 and a second battery cell 32 are accommodated.

[0259] In some embodiments, the first housing 10a and the second housing 10b are arranged in the third direction Z, the first housing 10a can be the lower housing, and the second housing 10b can be the lid.

[0260] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 provided according to any of the above embodiments, the battery device 100 being used to provide electrical energy.

[0261] The electrical equipment can be any of the above-mentioned devices or systems that utilize battery device 100.

[0262] According to some embodiments of this application, please refer to Figures 2 to 10. This application provides a battery device 100, which includes a housing 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.

[0263] The housing 10 includes a first housing 10a and a second housing 10b, which are fastened together to form an accommodating space. A first battery cell 31 and a second battery cell 32 are accommodated within this space, and are arranged along a third direction (Z). A support 80 is disposed within the accommodating space, separating the first battery cell 31 and the second battery cell 32. The first battery cell 31 and the first expansion beam 20 are located within the space enclosed by the support 80 and the first housing 10a, while the second battery cell 32 and the second expansion beam 20 are located within the space enclosed by the support 80 and the second housing 10b.

[0264] The first housing 10a includes a bottom wall 13, a first battery cell 31 and a first expansion beam 20 disposed on the bottom wall 13, a bracket 80 disposed parallel to the bottom wall 13, and a second battery cell 32 and a second expansion beam 90 disposed on the bracket 80.

[0265] 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 a 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, and 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, and the first beam 21 cooperates with the first battery cell 31.

[0266] The second expansion beam 90 divides the space on the side of the support 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 opposite sides of the support 80 in the third direction Z. The second expansion beam 90 includes a third beam 91 and a fourth beam 92, forming a second mounting space 93 between the third beam 91 and the fourth beam 92. The second mounting space 93 is located within the second electrical compartment 15, and the third beam 91 cooperates with the second battery cell 32.

[0267] 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, with the high voltage box 60 located in the first electrical compartment 12 and the second electrical compartment 15.

[0268] According to the battery device 100 of the present application embodiment, a first electrical component 41 is disposed in a first installation space 23, a second electrical component 42 is disposed in a second installation space 93, and a high voltage box 60 is disposed in a first electrical compartment 12 and a second electrical compartment 15, so that the electrical components are compactly installed inside the housing 10, improving the space utilization rate inside the housing 10, and making the battery device 100 have a high energy density.

[0269] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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, comprising: a box body; a first expansion beam arranged in the box body and dividing a space in the box body into a first battery compartment and a first electrical compartment; a first battery cell arranged in the first battery compartment and cooperating with the first expansion beam; a first electrical component arranged in the first electrical compartment and electrically connected with the first battery cell; wherein the first expansion beam comprises a first beam and a second beam connected at an included angle, a first mounting space is formed between the first beam and the second beam, the first mounting space is located in the first electrical compartment, at least part of the first electrical component is mounted on the first expansion beam and accommodated in the first mounting space.

2. The battery device of claim 1, wherein, The box body comprises 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 is connected with the bottom wall.

3. The battery device of claim 2, wherein, The battery device further comprises a high-voltage box arranged in the first electrical compartment, the high-voltage box is electrically connected with 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 or 3, wherein The first electrical component comprises a first battery monitoring unit and a first battery management unit; The first battery monitoring unit is mounted on any one of the first beam and the second beam, and the first battery management unit is mounted on any one of the first beam and the second beam.

5. The battery device of claim 4, wherein, The first battery monitoring unit is mounted on the first beam, and a large surface of the first battery monitoring unit is arranged on a wall surface of the first beam forming the first mounting space; The first battery management unit is mounted on the second beam and is arranged in a spaced manner with the first battery monitoring unit.

6. The battery device according to any one of claims 2 to 5, wherein A first flow channel is formed in the interior of the bottom wall, the first flow channel is used for accommodating a heat exchange medium; The position where the bottom wall is connected with the first beam and / or the second beam avoids the first flow channel.

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

8. The battery device of claim 7, wherein, The battery device further comprises: a first liquid inlet pipe connected with the first liquid inlet connector; a first liquid outlet pipe connected with the first liquid outlet connector; a high-voltage box arranged in the box body and arranged on the bottom wall, the high-voltage box is electrically connected with the first battery cell, and 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 any one of claims 2 to 8, wherein, 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 mounting space, and the angle between the first wall surface and the second wall surface is obtuse.

10. The battery device according to any one of claims 1 to 9, wherein The interior of the first beam and the interior of the second beam both form cavities.

11. The battery device according to any one of claims 1 to 10, wherein The battery device further comprises: A second battery cell is arranged in the box and is arranged along a third direction with the first battery cell; A support is arranged between the first battery cell and the second battery cell, and the support bears the second battery cell; The box includes a bottom wall, the bottom wall bears the first battery cell, and the third direction is parallel to the thickness direction of the bottom wall.

12. The battery device of claim 11, wherein, The battery device further includes: A second expansion beam is arranged in the support and divides a space on a side of the support 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 the second battery cell cooperates with the second expansion beam; A second electrical component is arranged in the second electrical compartment and is electrically connected with the second battery cell; The second expansion beam includes a third beam and a fourth beam connected at an included angle, a second mounting space is formed between the third beam and the fourth beam, the second mounting space is located in the second electrical compartment, at least part of the second electrical component is mounted on the second expansion beam and accommodated in the second mounting space.

13. The battery device of claim 12, wherein, The support has a first end portion, which exceeds 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 of claim 13, wherein, The box includes a bottom wall, the bottom wall 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 a direction from the first battery compartment to the first electrical compartment, the bottom wall exceeds the support, 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 of claim 14, wherein, 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.

16. The battery device of any one of claims 12-15, wherein, The third beam cooperates with the second battery cell, and the third beam and / or the fourth beam is connected with the support; The second electrical component includes a second battery monitoring unit and a second battery management unit, the second battery monitoring unit is mounted on any one of the third beam and the fourth beam, and the second battery management unit is mounted on any one of the third beam and the fourth beam.

17. The battery device of claim 16, wherein, The second battery monitoring unit is mounted on the third beam, and a large surface of the second battery monitoring unit is attached to the third beam to form a wall surface of the second mounting space; The second battery management unit is mounted on the fourth beam and is arranged in a spaced manner with the second battery monitoring unit.

18. The battery device of any one of claims 12-17, wherein, The third beam cooperates with the second battery cell, and the third beam and / or the fourth beam is connected with the support; The third beam has a third wall surface away from the second battery cell, the fourth beam has a fourth wall surface away from the support, the third wall surface and the fourth wall surface enclose the second mounting space, and the angle between the third wall surface and the fourth wall surface is obtuse.

19. The battery device of any one of claims 12-18, wherein, The inner part of the bracket is formed with a second flow channel for accommodating a heat exchange medium; The position where the bracket is connected with the third beam and / or the fourth beam avoids the second flow channel.

20. The battery device of claim 19, wherein, The battery device further comprises a second liquid inlet connector and a second liquid outlet connector, both of which are connected with the bracket, and both of which are in communication with the second flow channel; Both the second liquid inlet connector and the second liquid outlet connector are located in the first electrical compartment, and the first electrical component is located between the second liquid inlet connector and the second liquid outlet connector along a second direction, which is perpendicular to the third direction.

21. The battery device of claim 20, wherein, The battery device further comprises: a second liquid inlet pipe connected with the second liquid inlet connector; a second liquid outlet pipe connected with the second liquid outlet connector; a high-voltage box arranged in the box body, the first battery monomer and the second battery monomer being electrically connected with the high-voltage box, and the high-voltage box being located between the second liquid inlet pipe and the second liquid outlet pipe along the second direction.

22. The battery device of any one of claims 12-21, wherein, Both the inner part of the third beam and the inner part of the fourth beam are formed with cavities.

23. An electrical equipment comprising the battery device according to any one of claims 1 to 22, which is used to provide electrical energy.

Images