Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, relates to the technical field of batteries, and can improve the space utilization rate and increase the energy density. The battery device comprises a battery monomer assembly, a bearing assembly and at least two battery management assemblies, the bearing assembly is fixed relative to the battery monomer assembly, the bearing assembly comprises a connecting frame, an expansion frame and at least two connecting parts, and the expansion frame is located on the side, away from the battery monomer assembly, of the connecting frame in the first direction; the connecting frame and the expansion frame are both connected with connecting parts. The at least two battery management assemblies are electrically connected with the battery monomer assemblies; in the first direction, at least one side of the connecting frame and at least one side of the extension frame are provided with battery management assemblies connected through connecting parts. The battery device is used for providing electric energy for electric equipment.

Description

Technical Field

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

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0003] In related technologies, a battery device consists of a housing, battery cells, and a battery management module (BMU). The BMU monitors and manages various parameters within the battery device, ensuring safe and stable operation of the battery system. The BMU also requires space within the battery device. Layout of the BMU and improvement of battery density to accommodate diverse battery device designs are currently pressing challenges. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery device and electrical equipment to improve space utilization and increase energy density.

[0005] This application is implemented through the following technical solutions.

[0006] In a first aspect, the present application provides a battery device comprising a battery cell assembly, a carrier assembly, and at least two battery management assemblies. The carrier assembly is fixed relative to the battery cell assembly and comprises a connecting frame, an expansion frame, and at least two connecting portions. Along a first direction, the expansion frame is located on a side of the connecting frame facing away from the battery cell assembly, and the connecting frame and the expansion frame are both connected to the connecting portion. At least two battery management assemblies are electrically connected to the battery cell assembly. Along the first direction, at least one side of the connecting frame and at least one side of the expansion frame each have a battery management assembly connected thereto via the connecting portion.

[0007] In the technical solution of the embodiments of the present application, at least two battery management assemblies are electrically connected to the battery cell assemblies to collect and process information from the battery cell assemblies, ensuring safe and stable system operation. Because the carrier assembly is fixed relative to the battery cell assemblies, and the carrier assembly includes a connecting frame, an expansion frame, and a connecting portion, the battery management assembly can be connected to at least one side of the connecting frame or expansion frame along a first direction via the connecting portion, thereby achieving connection between the battery management assembly and the battery cell assemblies.

[0008] Because at least one side of the connecting frame and at least one side of the expansion frame are connected to each other via a connecting portion along the first direction, and the connecting frame and the expansion frame are stacked in the first direction, at least two battery management assemblies are stacked. This facilitates the layout of the battery management assembly and battery cell assemblies within the battery device along the first direction, effectively utilizing the internal space of the battery device and increasing the energy density of the entire battery device.

[0009] In some embodiments of the present application, the first direction is a height direction, and at least two battery management assemblies are stacked above the battery cell assembly.

[0010] Here, the space in the height direction is utilized to install at least two battery management components, which does not occupy the lateral space of the battery device, facilitates the layout of the battery cell components inside the battery device, utilizes the limited space, rationally arranges and stacks the battery management components, reduces the free space inside the battery device, and improves the energy density.

[0011] In some embodiments of the present application, the battery device also includes a box body, in which the battery cell assembly, the carrying assembly, and at least two battery management assemblies are accommodated. The box body includes a bottom plate, the bottom plate is provided with a connecting beam, and the carrying assembly is connected to the connecting beam of the bottom plate.

[0012] Here, the connecting beam at the bottom plate of the box body has very high strength. The connecting beam connected to the bottom plate by the load-bearing component makes the connection of the load-bearing component stable, and the load-bearing capacity of the load-bearing component when carrying the battery management component is enhanced.

[0013] In some embodiments of the present application, a battery cell assembly includes two side plates, two end plates and at least one battery cell, the side plates and the end plates are connected in sequence and surround the battery cell in a lateral direction; the support assembly is connected to at least one of the side plates and the end plates.

[0014] Here, the load-bearing assembly is connected to the position of the battery cell assembly with better strength to improve the load-bearing stability. The load-bearing assembly is connected to at least one of the side plates and the end plates, or to one or both of them, to increase the connection strength and stability.

[0015] In some embodiments of the present application, the side panel has a fixing portion, the thickness of the fixing portion is greater than the thickness of other positions of the side panel, and the load-bearing assembly is connected to the fixing portion of the side panel.

[0016] Here, the load-bearing assembly is connected to the fixing portion of the side panel, which is convenient for setting and connection and convenient for assembly. In order to increase the strength of the connection, the thickness of the fixing portion of the side panel is increased, which can be greater than the thickness of other positions near the side panel to provide sufficient strength.

[0017] In some embodiments of the present application, the connecting frame is connected to the side panel, and the connecting portion connected to the connecting frame includes a first connecting portion, which is located on a side of the connecting frame close to the expansion frame, and the first connecting portion is connected to at least one battery management component located between the connecting frame and the expansion frame.

[0018] Here, by connecting the connecting frame to the side plate and arranging the first connecting portion on a side of the connecting frame close to the extension frame, at least one battery management assembly can be connected between the connecting frame and the extension frame, thereby achieving the support and connection of the battery management assembly.

[0019] In some embodiments of the present application, the connecting frame includes a supporting plate and a connecting plate. The supporting plate is located on one side of the battery cell assembly along the first direction. The supporting plate is arranged along the large surface extension direction of the battery management assembly. The connecting plates are two and are respectively located at both ends of the supporting plate. The connecting plates are perpendicular to the supporting plate and are connected to the side plates.

[0020] Here, the connection of the connecting frame is achieved by connecting the connecting plate to the side plate. The connecting plate is perpendicular to the load-bearing plate and can fit with the side plate for easy connection.

[0021] In some embodiments of the present application, the first connection parts include two and are spaced apart on the carrier plate, and two ends of a battery management assembly are connected to the connection frame through the two first connection parts respectively.

[0022] Here, the two first connection parts are spaced apart on the carrier plate, and at least one battery management assembly can be conveniently connected to the connection frame through the two first connection parts.

[0023] In some embodiments of the present application, the supporting plate is located above the battery cell assembly, the first connecting portion is provided on the upper surface of the supporting plate, and the lower surface of the battery management assembly connected to the connecting frame via the first connecting portion abuts against the upper surface of the supporting plate.

[0024] Here, the supporting plate is located above the battery cell assembly, and the battery management assembly is connected to the supporting plate through the first connecting portion on its upper surface. At this time, the supporting plate can also serve as an auxiliary supporting member of the battery management assembly, that is, the lower surface of the battery management assembly can abut against the upper surface of the supporting plate, and then the upper surface of the supporting plate can also support the battery management assembly, thereby reducing the stress generated by the battery management assembly on the first connecting portion.

[0025] In some embodiments of the present application, the connection portion connected to the expansion rack includes a second connection portion. Along the first direction, at least one side of the expansion rack is connected to the second connection portion, and the battery management component located on at least one side of the expansion rack is connected to the second connection portion on the corresponding side.

[0026] Here, along the first direction, the second connection portion provided on at least one side of the expansion rack is used to connect the battery management assembly on the corresponding side, which can facilitate the connection and setting of the battery management assembly to save space in the box of the battery device.

[0027] In some embodiments of the present application, the expansion rack includes a pull plate and a support column, the support column extends along a first direction, the pull plate is arranged along the large surface extension direction of the battery management component, there are at least two support columns, which are connected to at least two different positions of the pull plate and connected to the connecting rack, and the second connecting part is arranged close to the support column.

[0028] Here, the expansion rack is connected to the connecting rack via support columns, and the pull plate connects at least two support columns into a whole, strengthening the structural strength. The pull plate and support columns can be used to support a second or third battery management assembly.

[0029] In some embodiments of the present application, the connection portion connected to the expansion rack also includes a third connection portion, the second connection portion and the third connection portion are respectively located on both sides of the plane where the pull plate is located, and the battery management component connected to the expansion rack through the second connection portion and the battery management component connected to the expansion rack through the third connection portion are respectively located on both sides of the plane where the pull plate is located.

[0030] Here, at least one additional battery management assembly can be connected to the expansion rack via the third connection portion on the expansion rack. Since the second and third connection portions are located on either side of the plane where the pull plate is located, the battery management assembly connected to the expansion rack via the second connection portion and the battery management assembly connected to the expansion rack via the third connection portion are located on either side of the plane where the pull plate is located. This arrangement, combined with the battery management assembly connected to the connecting rack via the first connection portion, enables a stacking arrangement of at least three battery management assemblies along the first direction, further utilizing the space along the height of the battery assembly, improving space utilization, and facilitating increased overall energy density.

[0031] In some embodiments of the present application, at least a portion of the connecting frame and the extension frame are located above the battery cell assembly, the second connecting portion and the third connecting portion are respectively located on the lower side and the upper side of the plane where the pull plate is located, and the lower surface of the battery management assembly connected to the extension frame through the third connecting portion abuts against the upper surface of the pull plate.

[0032] Here, when the battery management assembly is positioned above the battery cell assembly in the height direction, at least a portion of the connecting frame and the expansion frame can be positioned above the battery cell assembly. By positioning the second connecting portion below the plane of the pull plate and the third connecting portion above the plane of the pull plate, the battery management assembly is positioned on both the upper and lower sides of the pull plate. Furthermore, to reduce stress on the third connecting portion, the pull plate can also serve as an auxiliary load-bearing mechanism. Specifically, the lower surface of the battery management assembly connected to the expansion frame via the third connecting portion can abut against the upper surface of the pull plate. Consequently, utilizing gravity, the pull plate can provide a certain amount of support for the battery management assembly positioned thereon.

[0033] In some embodiments of the present application, the second connection portion and the third connection portion are staggered along the first direction.

[0034] Here, the second connection portion and the third connection portion are staggered to facilitate stamping and bending, facilitate installation, and reduce interference between them.

[0035] In some embodiments of the present application, the battery management assembly includes a shell, a circuit board is provided in the shell, a protrusion extends outward from the shell, and the protrusion is connected to the connecting portion to connect the battery management assembly to the carrier assembly.

[0036] Here, a functional circuit board is provided inside the battery management component, and is protected by a shell on the outside. By providing a protrusion outside the shell and connecting the fixing part with the connecting part, the battery management component is connected to the carrier component.

[0037] In some embodiments of the present application, the connecting portion includes a connecting hole formed in the load-bearing component, and a nested piece is provided inside the fixing portion. The fixing portion is connected to the connecting portion by a fastener passing through the connecting hole and connected to the nested piece.

[0038] Here, a fixing portion is formed on the outside of the shell, and a nested piece, such as a nut, is nested in the fixing portion; the connecting portion can be a connecting hole formed on the bearing component, so that the fixing portion and the connecting portion can be conveniently connected by passing a fastener through the connecting hole and connecting with the nested piece.

[0039] A second aspect of the present application provides an electrical device, comprising a battery device for providing electrical energy provided by any of the above embodiments.

[0040] In the technical solution of the embodiment of the present application, since the battery device in any of the above embodiments is included, the same beneficial effects can be achieved, that is, space utilization can be improved and energy density can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0042] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0043] Figure 2 An exploded diagram of a battery device provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a battery management assembly provided on a housing of a battery device according to an embodiment of the present application;

[0045] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B;

[0046] Figure 5 A schematic diagram of the structure of the connection frame and battery management assembly of the battery device provided in an embodiment of the present application;

[0047] Figure 6 A schematic structural diagram of a connecting frame of a battery device provided in an embodiment of the present application;

[0048] Figure 7 A schematic diagram of the structure of the assembly of the carrier assembly and the battery management assembly of the battery device provided in an embodiment of the present application;

[0049] Figure 8 A schematic diagram of the structure of the connection frame and expansion frame assembly of the battery device provided in an embodiment of the present application;

[0050] Figure 9 This is one of the structural schematic diagrams of the expansion rack of the battery device provided in an embodiment of the present application;

[0051] Figure 10 This is the second structural diagram of the expansion rack of the battery device provided in an embodiment of the present application.

[0052] Description of Reference Numerals

[0053] 1000-vehicle; 100-battery device; 110-casing; a-cavity; 111-first casing portion; 112-second casing portion; 120-battery cell assembly; 121-side panel; 122-end panel; 130-battery management assembly; 131-casing; 1311-protrusion; 140-carrying assembly; 141-connecting portion; 1411-first connecting portion; 1412-second connecting portion; 1413-third connecting portion; 142-connecting frame; 1421-carrying plate; 1422-connecting plate; 143-extension frame; 1431-pull plate; 1432-support column; 150-wiring harness isolation plate assembly; 200-controller; 300-motor; Z-height direction; X-width direction; Y-length direction. DETAILED DESCRIPTION

[0054] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0056] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0057] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0059] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0062] Below, this application is described in detail.

[0063] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0064] The inventors of this application note that in related art, a battery device includes a housing, battery cells, and a battery management assembly. The battery management assembly monitors and manages various indicators within the battery device to ensure safe and stable operation of the battery system. Prioritizing the layout of more battery cells within the housing of a battery device increases energy density.

[0065] The inventors of this application have discovered through research that the space within a housing can have different layout requirements depending on the application scenario and design. For example, the space reserved for the battery device within an electrical device can vary in shape, or the layout and arrangement of other components within the battery device can vary depending on their needs. Consequently, the layout of the battery management components that occupy the space within the battery device also requires optimized design.

[0066] Based on this design concept, the present application provides a battery device and electrical equipment to improve space utilization and increase energy density.

[0067] Specifically, refer to Figures 2 to 10 As shown, the present application provides a battery device 100, which includes a battery cell assembly 120, a carrier assembly 140, and at least two battery management assemblies 130. The carrier assembly 140 is fixed relative to the battery cell assembly 120 and includes a connecting frame 142, an expansion frame 143, and at least two connecting portions 141. Along a first direction, the expansion frame 143 is located on a side of the connecting frame 142 facing away from the battery cell assembly 120. The connecting frame 142 and the expansion frame 143 are both connected to the connecting frame 142 and the expansion frame 143. The at least two battery management assemblies 130 are electrically connected to the battery cell assembly 120. Along the first direction, at least one side of the connecting frame 142 and at least one side of the expansion frame 143 are connected to the battery management assembly 130 via the connecting portion 141.

[0068] In the technical solution of the embodiment of the present application, at least two battery management assemblies 130 are electrically connected to the battery cell assemblies 120 to collect and process information from the battery cell assemblies 120, ensuring safe and stable system operation. Because the carrier assembly 140 is fixed relative to the battery cell assemblies 120, and the carrier assembly 140 includes a connecting frame 142, an expansion frame 143, and a connecting portion 141, the battery management assembly 130 can be connected to at least one side of the connecting frame 142 and the expansion frame 143 along the first direction via the connecting portion 141, thereby achieving connection between the battery management assembly 130 and the battery cell assemblies 120.

[0069] Because the battery management assemblies 130 are connected to at least one side of the connecting frame 142 and at least one side of the expansion frame 143 along the first direction via the connecting portion 141, and the connecting frame 142 and the expansion frame 143 are stacked in the first direction, at least two battery management assemblies 130 are stacked. This facilitates the layout of the battery management assemblies 130 and the battery cell assemblies 120 within the battery device 100 along the first direction, effectively utilizing the internal space of the battery device 100 and increasing the energy density of the entire battery device 100.

[0070] The present application also provides an electrical device including the aforementioned battery device for providing electrical energy. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. The spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0071] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as an example of a vehicle.

[0072] Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 100 is disposed within vehicle 1000. Battery device 100 can be located at the bottom, front, or rear of vehicle 1000. Battery device 100 can be used to power vehicle 1000. For example, battery device 100 can serve as an operating power source for vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. Controller 200 is used to control battery device 100 to power motor 300, for example, to meet the power requirements of vehicle 1000 during startup, navigation, and driving.

[0073] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0074] Figure 2 This is an exploded diagram of a battery device 100 provided in some embodiments of the present application. The battery device 100 (Battery Apparatus) described in the embodiments of the present application may also include one or more battery cell assemblies 120 for providing voltage and capacity. A battery cell assembly 120 (Battery Cell Assembly) may include a single battery cell or multiple battery cells connected in series, parallel, or in parallel via a busbar.

[0075] In some embodiments, a battery cell assembly 120 is typically formed by arranging multiple battery cells. For example, the battery cell assembly 120 may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells together using cable ties.

[0076] In some embodiments, as Figure 2 As shown, the battery device 100 may be a battery pack, which includes a box 110 and one or more battery cell assemblies 120 , and the battery cell assemblies 120 are accommodated in a cavity a.

[0077] As an example, the battery cell assembly 120 may be a battery module, and the battery cell assembly 120 may be accommodated in the cavity a by fixing the battery module in the cavity a.

[0078] As an example, the battery cell assembly 120 may also be accommodated in the cavity a by directly fixing a plurality of battery cells in the cavity a.

[0079] As an example, Figure 2 As shown, the housing 110 may include a first housing portion 111 and a second housing portion 112. The first housing portion 111 and the second housing portion 112 engage to form an enclosed space within the housing 110, namely, cavity a, to accommodate the battery cell assembly 120. Enclosed here means covered or closed, and may be sealed or unsealed. The first housing portion 111 may be a top cover or a bottom plate.

[0080] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0081] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0082] In addition, illustratively, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, and a polygonal battery cell. The polygonal battery cell is, for example, a hexagonal battery cell, etc. There is no special limitation in the embodiments of the present application.

[0083] Below, refer to Figures 2 to 10 Some embodiments of the present application are described in detail.

[0084] In some embodiments of the present application, reference is made to Figure 3 and Figure 4 , Figure 3 A schematic structural diagram of a battery management assembly 130 provided on a housing 110 of a battery device 100 according to an embodiment of the present application; Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B;

[0085] The present application provides a battery device 100, which includes a battery cell assembly 120, a carrier assembly 140, and at least two battery management assemblies 130. The carrier assembly 140 is fixed relative to the battery cell assembly 120 and includes a connecting frame 142, an expansion frame 143, and at least two connecting portions 141. Along a first direction, the expansion frame 143 is located on a side of the connecting frame 142 facing away from the battery cell assembly 120. The connecting frame 142 and the expansion frame 143 are both connected to the connecting frame 142 and the expansion frame 143. The at least two battery management assemblies 130 are electrically connected to the battery cell assembly 120. Along the first direction, at least one side of the connecting frame 142 and at least one side of the expansion frame 143 are connected to the battery management assembly 130 via the connecting portion 141.

[0086] It can be understood that the battery management components 130 connected to at least one side of the connecting frame 142 and at least one side of the extension frame 143 are connected via the connecting portions 141 connected thereto.

[0087] The battery management component 130 is used to monitor and manage various indicators within the battery device 100 to ensure safe and stable operation of the battery system. It can include a cell supervising circuit (CSC), a battery management unit (BMU), and a battery management system (BMS).

[0088] There are at least two battery management assemblies 130, that is, the number of battery management assemblies 130 can be two, three, four, etc. Each battery management assembly 130 is an independent structure and can be independently manufactured and installed.

[0089] There are at least two connecting parts 141 , that is, the connecting parts 141 can be an integer of two, three, four, etc. The connecting frame 142 can be connected to one connecting part 141 or multiple connecting parts 141 , and the expansion frame 143 can be connected to one connecting part 141 or multiple connecting parts 141 .

[0090] The carrier assembly 140 can be a frame with a certain strength and has a structure that can be connected to the box body 110. For example, the connecting frame 142 is connected to the battery cell assembly 120, and then the expansion frame 143 is connected to the connecting frame 142, thereby connecting the connecting frame 142 and the expansion frame 143 into a whole. The battery management assembly 130 is then installed and connected to at least one side of the connecting frame 142 and the expansion frame 143 along the first direction via the connecting portion 141.

[0091] The battery cell assembly 120 can be a battery module, which itself has some external structures and a certain degree of strength. The support assembly 140 can be connected to the battery module and the battery cell assembly 120. This improves the stability of the connection of the support assembly 140 and ensures that the support point of the support assembly 140 after supporting the battery management assembly 130 has sufficient strength.

[0092] The supporting assembly 140 is fixed relative to the battery cell assembly 120, and the supporting assembly 140 can be connected to the box body 110 and / or the battery cell assembly 120, that is, the supporting assembly 140 can be connected to the box body 110 alone, or to the battery cell assembly 120 alone, or to both the box body 110 and the battery cell assembly 120.

[0093] The connecting portion 141 may be a structure connected to the connecting frame 142 and the extension frame 143 and capable of connecting to the battery management assembly 130 , such as a hole, a protrusion, a buckle, an adhesive surface, a welding surface, etc.

[0094] The first direction may be a height direction Z. The height direction Z refers to the two directions aligned with and opposite to the direction of gravity when the battery device 100 is placed flat. Along these directions, the battery device 100 has a certain height to accommodate the battery cell assembly 120. Multiple battery management assemblies 130 are stacked in the height direction Z. The first direction may also be a horizontal direction, including the width direction X and the length direction Y.

[0095] For ease of illustration, refer to Figure 3 and Figure 4 The horizontal direction of the battery device 100 includes a width direction X and a length direction Y.

[0096] The battery management assembly 130 is located on one side of the battery cell assembly 120 along the first direction. That is, in the first direction, the battery management assembly 130 can be located on one side of the battery cell assembly 120, which can be the upper side, lower side, peripheral side (including left, right, front and back sides), etc. as needed.

[0097] In the technical solution of the embodiment of the present application, at least two battery management components 130 are electrically connected to the battery cell components 120 to collect and process information of the battery cell components 120 so that the system can operate safely and stably. Figure 3 and Figure 4 Since the supporting assembly 140 is fixed relative to the battery cell assembly 120, and the supporting assembly 140 includes a connecting frame 142, an extension frame 143 and a connecting portion 141, the battery management assembly 130 can be connected to at least one side of the connecting frame 142 and the extension frame 143 along the first direction through the connecting portion 141, thereby realizing the connection between the battery management assembly 130 and the battery cell assembly 120.

[0098] Because the battery management assemblies 130 are connected to at least one side of the connecting frame 142 and at least one side of the expansion frame 143 along the first direction via the connecting portion 141, and the connecting frame 142 and the expansion frame 143 are stacked in the first direction, at least two battery management assemblies 130 are stacked. This facilitates the layout of the battery management assemblies 130 and the battery cell assemblies 120 within the battery device 100 along the first direction, effectively utilizing the internal space of the battery device 100 and increasing the energy density of the entire battery device 100.

[0099] In some embodiments of the present application, the battery device 100 also includes a box body 110, in which a battery cell assembly 120, a supporting assembly 140, and at least two battery management assemblies 130 are housed. The box body 110 includes a bottom plate, the bottom plate is provided with a connecting beam, and the supporting assembly 140 is connected to the connecting beam of the bottom plate.

[0100] The housing 110 is a protective shell for the battery device 100 and may include a first housing portion 111 and a second housing portion 112. The housing may contain the battery cell assembly 120, the battery management assembly 130, and other necessary components such as the wiring harness isolation plate assembly 150.

[0101] The base plate is provided with connecting beams, which means that for strength purposes, some structures are provided on the base plate to increase its structural strength, such as cross beams, longitudinal beams, reinforcing ribs, thickened areas, etc. These strong structures have the function of supporting the internal components of the battery device 100, such as the battery cell assembly 120.

[0102] Here, since the connecting beam of the base plate has high strength, the connection of the supporting assembly 140 to the connecting beam of the base plate is stable, and the carrying capacity of the supporting assembly 140 when carrying the battery management assembly 130 is enhanced.

[0103] In some embodiments of the present application, the box body 110 may include a first box body portion 111 and a second box body portion 112 , wherein one of the first box body portion 111 and the second box body portion 112 may be a top cover, and the other may be a bottom plate.

[0104] On this basis, due to the draft angle during manufacturing, the side walls of the first box portion 111 and the second box portion 112 may be non-vertical, that is, inclined relative to the height direction Z. In this way, the space inside the battery device 100 can be more reasonably utilized.

[0105] The outer edge of at least one side of at least two battery management components 130 is arranged close to the side wall of the first box body 111 or the second box body 112, and along the first direction, the inclination angle of the at least two battery management components 130 relative to the first direction is adapted to the side wall of the first box body 111 or the second box body 112.

[0106] The first box body portion 111 and the second box body portion 112 are buckled together to form a closed space inside the box body 110, in which the battery cell assembly 120, the wiring harness isolation plate assembly 150 and the battery management assembly 130 can be arranged.

[0107] The outer edge of at least one side of the at least two battery management assemblies 130 is disposed close to the side wall of the first housing portion 111 or the second housing portion 112. This means that the battery management assembly 130 can be disposed on one side of the housing 110 along the first direction, and in the horizontal direction, the battery management assembly 130 can be disposed in the middle of one side of the housing 110 or on the edge of one side of the housing 110. In other words, the battery management assembly 130 is disposed close to the side wall of the first housing portion 111 or the second housing portion 112.

[0108] The inclination angle of at least two battery management assemblies 130 tilted relative to the first direction along a first direction means that, when the at least two battery management assemblies 130 are stacked, the edges of each battery management assembly 130 may be misaligned or overlapped along the first direction. When the edges of each battery management assembly 130 are misaligned along the first direction, the sidewalls of the stacked battery management assemblies 130 are tilted relative to the first direction along the extension direction. The inclination angle is the angle between the extension direction and the first direction.

[0109] The tilt angle matches the sidewalls of the first housing portion 111 or the second housing portion 112. The sidewalls of the first housing portion 111 or the second housing portion 112 also tilt at an angle relative to the first direction. The tilt angles of the stacked battery management assembly 130 along the extension direction match the tilt angles of the sidewalls of the first housing portion 111 or the second housing portion 112. These tilt angles can be equal or have a certain assembly tolerance. This allows the battery management assembly 130 to be closer to or fit more closely to the sidewalls of the first housing portion 111 or the second housing portion 112, reducing the empty space within the battery device 100.

[0110] Here, the stacking of the battery management components 130 can adapt to the tilted space of the first box body 111 or the second box body 112 caused by factors such as the draft angle. By utilizing the limited space, the battery management components 130 are rationally arranged and stacked, reducing the empty space inside the battery device 100 and improving the energy density.

[0111] In some embodiments of the present application, the first direction is a height direction Z, and at least two battery management assemblies 130 are stacked above the battery cell assembly 120 .

[0112] In this way, the space in the height direction is utilized to install at least two battery management assemblies 130, without occupying the lateral space of the battery device 100, which facilitates the layout of the battery cell assemblies 120 inside the battery device 100. By utilizing the limited space, the battery management assemblies 130 are rationally arranged and stacked, reducing the free space inside the battery device 100 and improving the energy density.

[0113] In some embodiments of the present application, the battery cell assembly 120 includes two side plates 121, two end plates 122 and at least one battery cell. The side plates 121 and the end plates 122 are connected in sequence and surround the battery cell in a lateral direction; the supporting assembly 140 is connected to at least one of the side plates 121 and the end plates 122.

[0114] The side plates 121 and the end plates 122 are connected in sequence and enclosed around the bottom plate. This means that when the battery cell assembly 120 is a battery module, it can be formed by two side plates 121 and two end plates 122 enclosing around the side of the battery cell.

[0115] The load-bearing assembly 140 is connected to at least one of the side panels 121 and the end panels 122. Specifically, the load-bearing assembly 140 may be connected to only one of the side panels 121 and the end panels 122, or may be connected to both the side panels 121 and the end panels 122. The specific location and number of connections may be set as needed.

[0116] Here, the supporting assembly 140 can be connected to a position with better strength in the battery device 100 as needed, which can be one or both of the side plates 121 and the end plates 122 to improve the supporting stability.

[0117] Of course, the load-bearing assembly 140 can also be connected to the box body 110 as needed, for example, by connecting the load-bearing assembly 140 to the connecting beam of the bottom plate. Furthermore, the load-bearing assembly 140 can be connected to one or more of the bottom plate, the side plates 121, or the end plates 122 to improve load-bearing stability. In some embodiments of the present application, the side plates 121 have a fixed portion that is thicker than the thickness of other portions of the side plates 121, and the load-bearing assembly 140 is connected to the fixed portion of the side plates 121.

[0118] The thickness of the fixing portion is greater than that of the rest of the side panel 121. This means that the fixing portion is stronger, making it easier to connect and secure the structure compared to other locations on the side panel 121. The rest of the side panel 121 is defined as any location other than the fixing portion. The side panel 121 can be formed from an injection-molded plastic sheet, with the fixing portion thickened to enhance strength.

[0119] Here, the bearing assembly 140 is connected to the fixed portion of the side panel 121 for easy installation and connection, and convenient assembly. In order to improve the strength of the connection, the thickness of the fixed portion of the side panel 121 is increased, which can be greater than the thickness of other positions near the side panel 121 to provide sufficient strength.

[0120] Of course, in some embodiments, the bearing assembly 140 is connected to the end plate 122 , and the end plate 122 also has relatively high strength. The bearing assembly 140 can be connected to the end plate 122 without interfering with other components at the end plate 122 .

[0121] In some embodiments of the present application, reference is made to Figure 4 、 Figure 5 and Figure 6 , Figure 5 A schematic diagram of the structure of the assembly of the connecting frame 142 and the battery management assembly 130 of the battery device 100 provided in an embodiment of the present application; Figure 6 A schematic structural diagram of the connecting frame 142 of the battery device 100 provided in an embodiment of the present application;

[0122] The connecting frame 142 is connected to the side panel 121, and the connecting part 141 connected to the connecting frame 142 includes a first connecting part 1411. The first connecting part 1411 is located on the side of the connecting frame 142 close to the expansion frame 143. The first connecting part 1411 is connected to at least one battery management component 130 located between the connecting frame 142 and the expansion frame 143.

[0123] The connecting frame 142 can be connected to one, two, or more battery management components 130 via the first connecting portion 1411. The structure and number of the first connecting portion 1411 can be set according to actual needs. The first connecting portion 1411 can be connected to at least one battery management component 130.

[0124] Here, the connecting frame 142 is connected to the side panel 121, and is connected to at least one battery management component 130 located between the connecting frame 142 and the extension frame 143 through a first connecting portion 1411 arranged on the side of the connecting frame 142 close to the extension frame 143. At least one battery management component 130 can be stably arranged between the connecting frame 142 and the extension frame 143, and the battery management component 130 can be carried and connected by utilizing the cooperation between the connecting frame 142 and the connecting portion 141.

[0125] In some embodiments of the present application, the connecting frame 142 includes a supporting plate 1421 and a connecting plate 1422. The supporting plate 1421 is located on one side of the battery cell assembly 120 along the first direction. The supporting plate 1421 is arranged along the large surface extension direction of the battery management assembly 130. There are two connecting plates 1422, which are respectively located at both ends of the supporting plate 1421. The connecting plate 1422 is perpendicular to the supporting plate 1421 and is connected to the side plate 121.

[0126] The supporting plate 1421 is the basic structure of the connecting frame 142. It can be a plate-shaped structure that can be located on one side of the battery cell assembly 120 along the first direction, so as to facilitate the layout of the first connecting portion 1411, and then the battery management assembly 130 can be connected through the first connecting portion 1411. The connecting frame 142 can be an injection molded part or a metal part. The material can be selected based on factors such as cost, strength requirements, and insulation requirements. Of course, the connecting frame 142 can also be a mixed material, or formed by combining parts made of multiple different materials. For example, the base is made of metal material, thickened and reinforced at the connection position, and covered or replaced with insulating plastic parts where insulation is required.

[0127] The connecting plate 1422 is used to connect with the side plate 121 and can be integrally formed with the supporting plate 1421 by injection molding or bending. Figure 4 The connecting plate 1422 is connected to the side plate 121 of the box body 110. Similarly, it can be an injection molded part or a metal part. The material can be selected according to factors such as cost, strength requirements, insulation requirements, etc.

[0128] The direction of the large surface extension of the battery management assembly 130 is the surface with the largest area on the battery management assembly 130. The battery management assembly 130 is often placed on this surface as the base surface. On this basis, the height of the battery management assembly 130 along the first direction is generally low, and thus, the stacking of at least two battery management assemblies 130 is easier to achieve. Figure 4 In the horizontal plane where the width direction X and the length direction Y are located, the large-surface extension direction of the battery management assembly 130 is approximately horizontal and can be parallel to the supporting plate 1421 so that the supporting plate 1421 can support the battery management assembly 130.

[0129] There are two connecting plates 1422 , which are located at both ends of the supporting plate 1421 . This means that both ends of the supporting plate 1421 are connected to the structural components of the battery cell assembly 120 through the connecting plates 1422 , making the connected structure more stable.

[0130] The two ends of the supporting plate 1421 are two opposite ends of the supporting plate 1421 along a certain direction. Figure 4The supporting plate 1421 can span the two opposite side plates 121 of the battery cell assembly 120, and the two ends of the supporting plate 1421 are exactly located at the two opposite side plates 121 of the battery cell assembly 120. In this way, it is convenient to connect with the two opposite side plates 121 of the battery cell assembly 120.

[0131] The connecting plate 1422 is perpendicular to the supporting plate 1421, and the plane where the supporting plate 1421 is located can be parallel to the horizontal plane. The connecting plate 1422 is required to connect the two opposite side plates 121 of the battery cell assembly 120, and can be perpendicular to the supporting plate 1421, that is, the connecting plate 1422 is parallel to the side plates 121 of the battery cell assembly 120, so that the connection, bonding, welding and other connections of the fasteners can be conveniently performed.

[0132] Of course, the connecting plate 1422 may also be connected to the two end plates 122 of the battery cell assembly 120 .

[0133] Here, the connection of the connecting frame 142 is achieved by connecting the connecting plate 1422 to the side plate 121. The connecting plate 1422 is perpendicular to the supporting plate 1421 and can be fitted with the side plate 121 for easy connection.

[0134] In some embodiments of the present application, two first connection parts 1411 are provided at intervals on the carrier plate 1421 , and two ends of a battery management assembly 130 are connected to the connection frame 142 via the two first connection parts 1411 .

[0135] The first connection parts 1411 include two, that is, there may be two, three, four or more first connection parts 1411 provided on the carrying plate 1421 .

[0136] The first connection parts 1411 are spaced apart on the carrier plate 1421, and the plurality of first connection parts 1411 are spaced apart. Figure 5 and Figure 6 There are two first connection parts 1411, and the two first connection parts 1411 are spaced apart on the carrier board 1421. The battery management component 130 can be disposed in the space.

[0137] Here, the two first connection parts 1411 are spaced apart and arranged on the carrier plate 1421 , and at least one battery management assembly 130 can be conveniently connected to the connection frame 142 through the two first connection parts 1411 .

[0138] In some embodiments of the present application, the supporting plate 1421 is located above the battery cell assembly 120, the first connecting portion 1411 is arranged on the upper surface of the supporting plate 1421, and the lower surface of the battery management assembly 130 connected to the connecting frame 142 through the first connecting portion 1411 abuts against the upper surface of the supporting plate 1421.

[0139] The carrier plate 1421 is located above the battery cell assembly 120 in a direction based on gravity, which facilitates the installation of the carrier plate 1421 and the connection of the battery management assembly 130 to the carrier plate 1421 .

[0140] The first connection portion 1411 is disposed on the upper surface of the carrier plate 1421 , which means that the first connection portion 1411 is located on the upper side of the carrier plate 1421 based on the direction of gravity, so that the battery management assembly 130 can be connected to the upper side of the carrier plate 1421 .

[0141] The battery management component 130 connected to the connecting frame 142 through the first connecting part 1411 refers to the battery management component 130 connected to the connecting frame 142 only through the first connecting part 1411. It can be understood that the battery management component 130 can also be connected to the connecting frame 142 through other structures; it can also be connected to the non-connecting frame structure of the supporting component 140 through other structures. Here, only the battery management component 130 connected to the connecting frame 142 through the first connecting part 1411 is involved, and the remaining battery management components 130 do not fall within this scope.

[0142] The lower surface of the battery management assembly 130 abuts against the upper surface of the carrier plate 1421, which means that after the battery management assembly 130 is connected through the first connection portion 1411, the battery management assembly 130 will also be placed on the carrier plate 1421. In this way, the battery management assembly 130 not only transfers weight through the first connection portion 1411, but can also directly transfer weight to the carrier plate 1421 through the lower surface.

[0143] Here, the supporting plate 1421 is located above the battery cell assembly 120, and the supporting plate 1421 is connected to the battery management assembly 130 through the first connecting portion 1411 on its upper surface. At this time, the supporting plate 1421 can also serve as an auxiliary supporting member of the battery management assembly 130, that is, the lower surface of the battery management assembly 130 can be abutted against the upper surface of the supporting plate 1421, and then the upper surface of the supporting plate 1421 can also support the battery management assembly 130, thereby reducing the stress generated by the battery management assembly 130 on the first connecting portion 1411.

[0144] In some embodiments of the present application, reference is made to Figure 4 、 Figure 7 and Figure 8 , Figure 7 A schematic structural diagram of the assembly of the carrier assembly 140 and the battery management assembly 130 of the battery device 100 provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of the assembly of the connecting frame 142 and the expansion frame 143 of the battery device 100 provided in an embodiment of the present application;

[0145] The connection portion 141 connected to the expansion rack 143 includes a second connection portion 1412. Along the first direction, at least one side of the expansion rack 143 is connected to the second connection portion 1412. The battery management assembly 130 located on at least one side of the expansion rack 143 is connected to the second connection portion 1412 on the corresponding side.

[0146] The expansion rack 143 is a structure provided in addition to the connecting rack 142 of the carrier assembly 140. The connecting rack 142 is initially connected to the housing 110 and / or the battery cell assembly 120, and serves as the base frame of the carrier assembly 140. Multiple battery management assemblies 130 can be directly stacked and installed on the connecting rack 142. Of course, to facilitate the stacking of multiple battery management assemblies 130, the carrier assembly 140 also includes the expansion rack 143. The expansion rack 143 can be used to connect additional battery management assemblies 130, facilitating the connection of stacked battery management assemblies 130.

[0147] The side of the connecting frame 142 away from the battery cell assembly 120 means that the expansion frame 143 is further arranged in the height space based on the connecting frame 142. For example, if the connecting frame 142 is located above the battery cell assembly 120, the expansion frame 143 is located above the connecting frame 142.

[0148] The second connection parts 1412 may include two, three, or four. The second connection parts 1412 may be arranged at intervals on the expansion rack 143 , and both ends of a battery management assembly 130 are connected to the expansion rack 143 via two second connection parts 1412 .

[0149] The two second connection portions 1412 are spaced apart from each other on the expansion rack 143 , and at least one battery management assembly 130 can be conveniently connected to the expansion rack 143 via the two second connection portions 1412 .

[0150] Here, along the first direction, at least one side of the expansion rack 143 is connected to a second connection portion 1412, and the second connection portion 1412 can be connected to at least one battery management component 130 on the corresponding side to stably set the battery management component 130 on one side of the expansion rack 143, thereby saving lateral space within the box 110 of the battery device 100.

[0151] In some embodiments of the present application, reference is made to Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the structure of the expansion rack 143 of the battery device provided in an embodiment of the present application; Figure 10 This is a second structural diagram of the expansion rack 143 of the battery device provided in an embodiment of the present application;

[0152] The expansion rack 143 includes a pull plate 1431 and a support column 1432. The support column 1432 extends along a first direction. The pull plate 1431 is arranged along the large-surface extension direction of the battery management component 130. There are at least two support columns 1432, which are connected to at least two different positions of the pull plate 1431 and are connected to the connecting rack 142. The second connecting portion 1412 is arranged close to the support column 1432.

[0153] The support column 1432 extends along the first direction, which means that the support column 1432 has a height extension along the first direction, and thus the support column 1432 can provide a point in the first direction where the battery management assembly 130 can be connected. Here, the first direction can be the height direction Z.

[0154] The pull plate 1431 is arranged along the extension direction of the large surface of the battery management assembly 130, which means that the pull plate 1431 is relatively parallel to the large surface of the battery management assembly 130, which can facilitate layout and conveniently support the battery management assembly 130 located above the pull plate 1431.

[0155] There are at least two support columns 1432, that is, there can be two or more support columns 1432. The pull plate 1431 is connected to the connecting frame 142 through the support columns 1432. The support columns 1432 support the pull plate 1431 to facilitate the installation of the battery management assembly 130. Each support column 1432 provides a fulcrum for the pull plate 1431. In order to provide stable support, there can be two or more support columns 1432. Figure 8 and Figure 10 There are three support columns 1432, which provide greater stability. The specific form of the support columns 1432 can be set according to the space. Two support columns 1432 can be located at each end of the pull plate 1431, and another support column 1432 can be located in the middle of the pull plate 1431. The support columns 1432 at both ends of the pull plate 1431 can be thinner due to the space, while the support column 1432 located in the middle of the pull plate 1431 can be wider if there is enough space to increase the support strength.

[0156] The second connection part 1412 is set close to the support column 1432. The second connection part 1412 is used to connect the battery management component 130 and needs to bear a large weight. The main supporting function of the expansion rack 143 is transmitted from the support column 1432. Therefore, the second connection part 1412 is set close to the support column 1432 to facilitate the transfer of the load.

[0157] Here, the expansion frame 143 is connected to the connecting frame 142 via support columns 1432. The pull plate 1431 connects at least two support columns 1432 into a whole to enhance the structural strength. The pull plate 1431 and support columns 1432 can support a second or third battery management assembly 130.

[0158] In some embodiments of the present application, the connection portion 141 connected to the expansion rack 143 also includes a third connection portion 1413, and the second connection portion 1412 and the third connection portion 1413 are respectively located on both sides of the plane where the pull plate 1431 is located. The battery management component 130 connected to the expansion rack 143 through the second connection portion 1412 and the battery management component 130 connected to the expansion rack 143 through the third connection portion 1413 are respectively located on both sides of the plane where the pull plate 1431 is located.

[0159] The second connection portion 1412 and the third connection portion 1413 are located on either side of the plane where the pull plate 1431 lies. This means that, with the plane in which the pull plate 1431 extends as a reference, the second connection portion 1412 is on one side of the reference plane, and the third connection portion 1413 is on the other side of the reference plane. For example, if the carrier assembly 140 is located above the battery cell assembly 120, the second connection portion 1412 is below the reference plane, and the third connection portion 1413 is above the reference plane.

[0160] Here, by providing a third connection portion 1413 on the expansion rack 143, at least one additional battery management assembly 130 can be connected to the expansion rack 143. Because the second connection portion 1412 and the third connection portion 1413 are located on either side of the plane where the pull plate 1431 lies, the battery management assembly 130 connected to the expansion rack 143 via the second connection portion 1412 and the battery management assembly 130 connected to the expansion rack 143 via the third connection portion 1413 are located on either side of the plane where the pull plate 1431 lies. This arrangement, combined with the battery management assemblies 130 connected to the connection rack 142 via the first connection portion 1411, enables a stacking arrangement of at least three battery management assemblies 130 along the first direction, further maximizing space utilization in the height direction Z of the battery assembly 100, thereby improving overall energy density.

[0161] In some embodiments of the present application, at least a portion of the connecting frame 142 and the extension frame 143 are located above the battery cell assembly 120 along the first direction, the second connecting portion 1412 and the third connecting portion 1413 are respectively located on the lower side and the upper side of the plane where the pull plate 1431 is located, and the lower surface of the battery management assembly 130 connected to the extension frame 143 through the third connecting portion 1413 abuts against the upper surface of the pull plate 1431.

[0162] The connecting frame 142 is at least partially located above the battery cell assembly 120 along the first direction. This means that, in the embodiment where the connecting frame 142 includes a supporting plate 1421 and a connecting plate 1422, the supporting plate 1421 is located above the battery cell assembly 120 along the first direction, while the connecting plate 1422 extends toward the side of the battery cell assembly 120 along the first direction to connect with the structural components of the battery cell assembly 120. In other words, the connecting plate 1422 is not located above the battery cell assembly 120. Therefore, the supporting plate 1421 of the connecting frame 142 is referred to as being located above the battery cell assembly 120 along the first direction.

[0163] Here, when the battery management assembly 130 is positioned above the housing 110 in the height direction Z, at least a portion of the connecting frame 142 and the expansion frame 143 can be positioned above the battery cell assembly 120 along the first direction. With the second connecting portion 1412 positioned below the plane of the pull plate 1431 and the third connecting portion 1413 positioned above the plane of the pull plate 1431, the battery management assembly 130 is positioned on both the upper and lower sides of the pull plate 1431. Furthermore, to reduce stress on the third connecting portion 1413, the pull plate 1431 can also serve as an auxiliary load-bearing mechanism. Specifically, the lower surface of the battery management assembly 130, connected to the expansion frame 143 via the third connecting portion 1413, can abut against the upper surface of the pull plate 1431. Consequently, utilizing gravity, the pull plate 1431 can provide a certain amount of support for the battery management assembly 130 positioned thereon.

[0164] In some embodiments of the present application, along the first direction, the second connection portion 1412 and the third connection portion 1413 are staggered.

[0165] Being staggered in the first direction means that the projections of the edges of the second connection portion 1412 and the third connection portion 1413 do not overlap and are misaligned in the first direction. That is, the second connection portion 1412 and the third connection portion 1413 do not interfere with each other in the first direction.

[0166] Here, the second connection portion 1412 and the third connection portion 1413 are staggered to facilitate stamping and bending, facilitate installation, and reduce interference between them.

[0167] The expansion frame 143 can be an injection molded part or a metal part. The material can be selected based on factors such as cost, strength requirements, insulation requirements, etc. Figure 9 and Figure 10The extension frame 143 is made of metal, which improves strength and facilitates manufacturing. The pull plate 1431, support column 1432, second connecting portion 1412, third connecting portion 1413, and various holes for fastener connection of the extension frame 143 can all be easily manufactured through sheet metal, stamping, bending and other processes.

[0168] In some embodiments of the present application, the battery management component 130 includes a shell 131, a circuit board is provided in the shell 131, and a protrusion 1311 extends outward from the shell 131. The protrusion 1311 is connected to the connecting portion 141 to connect the battery management component 130 with the carrier component 140.

[0169] The battery management assembly 130 includes a housing 131, which houses the functional components. The housing 131 can be integrally formed or removable. In some embodiments, the housing 131 includes an upper shell and a lower shell, which are removably fastened together to form the housing 131, facilitating production and assembly.

[0170] The circuit board refers to one of the functional parts of the battery management component 130. It can be understood that the circuit board can include a control unit, a circuit, a detection unit, etc., and these required functions can be integrated into one circuit board.

[0171] The protrusion 1311 is formed on the housing 131 of the battery management assembly 130. The protrusion 1311 facilitates connection between the battery management assembly 130 and other structures. Depending on the connection method, the protrusion 1311 can have many different structural forms. For example, the protrusion 1311 can have a hole structure for connection, a snap-fit ​​structure, an adhesive or welded structure, and so on.

[0172] Here, a functional circuit board is provided inside the battery management component 130 and is protected on the outside by a shell 131. By providing a protrusion 1311 outside the shell 131 and connecting the protrusion 1311 to the connecting part 141, the battery management component 130 is connected to the carrier component 140.

[0173] In some embodiments of the present application, the connecting portion 141 includes a connecting hole formed in the supporting assembly 140, and the protrusion 1311 has a nested piece inside. The protrusion 1311 is connected to the connecting portion 141 by a fastener passing through the connecting hole and connecting to the nested piece.

[0174] The nested part can be a structure connected by edges such as nuts. During the production process, the nested part such as nuts is placed in the mold in advance, and injection molding can be performed to form the housing 131 with the nested part inside.

[0175] Here, a protrusion 1311 is formed on the outside of the shell 131, and a nested piece, such as a nut, is nested in the protrusion 1311; the connecting portion 141 can be a connecting hole (not shown in the figure) formed on the supporting component 140. In this way, the protrusion 1311 can be conveniently connected to the connecting portion 141 by passing a fastener through the connecting hole and connecting with the nested piece.

[0176] In some embodiments of the present application, the battery management component 130 includes at least one of a single-module sampling module and a central summary module.

[0177] Here, the battery management component 130 can be one or more types, including at least one of a single-module sampling module and a central aggregation module. The single-module sampling module can be a cell supervising circuits (CSC), and the central aggregation module can be a battery management unit (BMU). Of course, the battery management component 130 can also be a battery management system (BMS) that includes both of the above. When the battery device 100 is composed of multiple battery modules connected in series or parallel, the BMS needs to communicate with multiple CSCs to manage them, with the CSCs acting as slave control modules.

[0178] In some embodiments, the battery device 100 includes multiple battery modules, each corresponding to a battery management assembly 130 (e.g., CSC). The number of battery cell assemblies 120 in each battery module may vary, and thus the amount of information to be collected by the battery management assembly 130 (e.g., CSC) may vary. Consequently, the shape and size of the battery management assembly 130 may vary. However, this does not affect the stacking configuration of this application.

[0179] On this basis, the battery management component 130 with a larger volume can be arranged closer to the bottom, and the battery management component 130 with a smaller volume can be arranged closer to the top.

[0180] In some embodiments of the present application, a flexible printed circuit (FPC) electrically connected to the battery cell assembly 120 can be directly plugged into the battery management assembly 130 without the need for switching, thereby speeding up production time and reducing production costs.

[0181] Specifically, it can be connected through a quick-plug connector, which reduces the risk of harness wear and reduces production cycle time.

[0182] It should be noted that multiple modules of adapters+connecting wires+adapters are stacked along the first direction.

[0183] The present application also provides an electrical device, comprising the battery device 100 for providing electrical energy provided by any of the above embodiments.

[0184] Since the electrical equipment includes the battery device 100 in any of the above embodiments, space utilization can be improved and energy density can be increased.

[0185] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Battery cell assembly; a carrying assembly fixed relative to the battery cell assembly; the carrying assembly includes a connecting frame, an extension frame, and at least two connecting portions, wherein along a first direction, the extension frame is located on a side of the connecting frame away from the battery cell assembly, and the connecting portions are connected to both the connecting frame and the extension frame; At least two battery management assemblies are electrically connected to the battery monomer assembly; along the first direction, at least one side of the connecting frame and at least one side of the expansion frame are connected with the battery management assembly through the connecting portion.

2. The battery device according to claim 1, wherein: The first direction is a height direction, and the at least two battery management assemblies are stacked above the battery cell assembly.

3. The battery device according to claim 1, wherein: The battery device also includes a box body, in which the battery cell assembly, the bearing assembly, and the at least two battery management assemblies are accommodated. The box body includes a bottom plate, the bottom plate is provided with a connecting beam, and the bearing assembly is connected to the connecting beam of the bottom plate.

4. The battery device according to claim 1, wherein: The battery cell assembly includes two side plates, two end plates and at least one battery cell, wherein the side plates and the end plates are connected in sequence and surround the battery cell in a lateral direction; The bearing assembly is connected to at least one of the side plates and the end plates.

5. The battery device according to claim 4, characterized in that The side plate has a fixing portion, the thickness of the fixing portion is greater than the thickness of other positions of the side plate, and the bearing assembly is connected to the fixing portion of the side plate.

6. The battery device according to claim 5, characterized in that The connecting frame is connected to the side plate, and the connecting part connected to the connecting frame includes a first connecting part, which is located on a side of the connecting frame close to the expansion frame, and the first connecting part is connected to at least one of the battery management components located between the connecting frame and the expansion frame.

7. The battery device according to claim 6, characterized in that The connecting frame includes a supporting plate and a connecting plate. The supporting plate is located on one side of the battery cell assembly along the first direction. The supporting plate is arranged along the large surface extension direction of the battery management assembly. There are two connecting plates, which are respectively located at both ends of the supporting plate. The connecting plate is perpendicular to the supporting plate and is connected to the side plate.

8. The battery device according to claim 7, characterized in that The first connecting parts include two and are spaced apart on the supporting plate. Two ends of one battery management assembly are connected to the connecting frame via the two first connecting parts respectively.

9. The battery device according to claim 8, characterized in that The carrier plate is located above the battery cell assembly. The first connecting portion is provided on the upper surface of the carrier plate. The lower surface of the battery management assembly connected to the connecting frame via the first connecting portion abuts against the upper surface of the carrier plate.

10. The battery device according to claim 6, characterized in that The connection part connected to the expansion rack includes a second connection part. Along the first direction, at least one side of the expansion rack is connected to the second connection part, and the battery management component located on at least one side of the expansion rack is connected to the second connection part on the corresponding side.

11. The battery device according to claim 10, characterized in that The expansion rack includes a pull plate and a support column, the support column extends along the first direction, the pull plate is arranged along the large-surface extension direction of the battery management component, there are at least two support columns, which are connected to at least two different positions of the pull plate and connected to the connecting rack, and the second connecting portion is arranged close to the support column.

12. The battery device according to claim 11, wherein: The connection part connected to the expansion rack also includes a third connection part. The second connection part and the third connection part are respectively located on both sides of the plane where the pull plate is located. The battery management component connected to the expansion rack through the second connection part and the battery management component connected to the expansion rack through the third connection part are respectively located on both sides of the plane where the pull plate is located.

13. The battery device according to claim 12, characterized in that At least part of the connecting frame and the extension frame are located above the battery cell assembly, the second connecting portion and the third connecting portion are respectively located on the lower side and upper side of the plane where the pull plate is located, and the lower surface of the battery management assembly connected to the extension frame through the third connecting portion abuts against the upper surface of the pull plate.

14. The battery device according to claim 12, wherein: Along the first direction, the second connection portion and the third connection portion are staggered.

15. The battery device according to any one of claims 1 to 14, characterized in that The battery management assembly includes a shell, a circuit board is arranged in the shell, a protrusion extends outward from the shell, and the protrusion is connected to the connecting portion to connect the battery management assembly with the supporting assembly.

16. The battery device according to claim 15, characterized in that The connecting portion includes a connecting hole formed in the bearing assembly, and a nesting piece is provided inside the protruding portion. A fastener passes through the connecting hole and is connected to the nesting piece, thereby connecting the protruding portion to the connecting portion.

17. The battery device according to any one of claims 1 to 14, characterized in that The battery management component includes at least one of a single-module sampling module and a central summary module.

18. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 17 for providing electric energy.

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