Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment. The battery device comprises a battery monomer group, a box body assembly, a fiber composite material mounting plate, a fastener and a control circuit board, the box body assembly is used for limiting a containing cavity, the battery monomer group is arranged in the containing cavity, the box body assembly comprises a side beam, the side beam is used for restraining the battery monomer group, at least part of the fiber composite mounting plate is located on the side, away from the battery monomer group, of the side beam and fixedly connected with the side beam, and at least part of the fastener is fixed to the side, facing the side beam, of the fiber composite mounting plate; the control circuit board is mounted on the side, away from the side beam, of the fiber composite mounting plate through a fastener. The battery device and the electric equipment provided by the embodiment of the utility model can give consideration to both energy density and use reliability.

Description

Technical Field

[0001] The embodiments of this application relate to the field of battery technology, and more particularly to a battery device and an electrical appliance. Background Technology

[0002] Batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are increasingly being used in the field of energy storage.

[0003] Control circuit boards are used to integrate various control modules of battery devices. In related technologies, the control circuit boards of batteries are usually set inside the housing cavity of the battery box or mounted on the outside of the box, which makes it difficult to balance the weight density and reliability of the battery. Utility Model Content

[0004] In view of this, the embodiments of this application aim to provide a battery device and electrical equipment that can balance energy density and reliability.

[0005] A first aspect of this application provides a battery device, comprising: a battery cell assembly; a housing assembly for defining a receiving cavity, the battery cell assembly being disposed in the receiving cavity, the housing assembly including a side beam for constraining the battery cell assembly; a fiber composite mounting plate, at least partially located on the side of the side beam opposite to the battery cell assembly and fixedly connected to the side beam; a fastener, at least partially fixed to the side of the fiber composite mounting plate facing the side beam; and a control circuit board mounted on the side of the fiber composite mounting plate opposite to the side beam via the fastener.

[0006] In the battery device of this embodiment, the control circuit board is mounted on the side beam via a fiber composite mounting plate and fasteners, and is located on the side of the side beam opposite to the battery cell pack. This helps save space in the housing cavity and improves the energy density of the battery device. Furthermore, in this embodiment, the control circuit board is mounted using a fiber composite mounting plate. Compared to directly connecting the control circuit board to the side beam, this helps reduce the number of holes drilled on the side beam, improves the sealing performance of the housing assembly, and the fiber composite mounting plate is made of fiber composite material, which has high strength and low weight, contributing to increased energy density. Furthermore, in this embodiment, the control circuit board is connected to the fiber composite mounting plate using fasteners. The fasteners are at least partially fixed to the side of the fiber composite mounting plate facing the side beam, which helps improve the connection strength between the fasteners and the fiber composite mounting plate, thereby improving the reliability of the control circuit board.

[0007] In some embodiments, the fastener includes a stud, the stud having a threaded portion and a flange portion, the fiber composite mounting plate having a through hole, the flange portion being fixed to the side of the fiber composite mounting plate facing the side beam and being fixedly connected to the side of the fiber composite mounting plate facing the side beam, the threaded portion passing through the through hole and protruding from the side of the fiber composite mounting plate away from the side beam.

[0008] In this embodiment, the flange portion of the stud is fixedly connected to the side of the fiber composite mounting plate facing the side beam, which helps to further improve the connection strength between the fastener and the fiber composite mounting plate.

[0009] In some embodiments, the fastener includes a nut that is fixed to the side of the fiber composite mounting plate facing the side beam and is fixedly connected to the side of the fiber composite mounting plate facing the side beam.

[0010] In this embodiment, the nut is fixedly connected to the side of the fiber composite mounting plate facing the side beam, which helps to further improve the connection strength between the fastener and the fiber composite mounting plate.

[0011] In some embodiments, the fiber composite mounting plate has a mounting groove formed on the side facing the side beam, and at least a portion of the fastener is located within the mounting groove.

[0012] In this embodiment, by positioning at least a portion of the fastener within the mounting groove, the likelihood of interference between the fastener and the side beam can be reduced. In particular, in embodiments where the side beam includes a fiber composite layer and an insulating structure layer, the probability of surface defects in the side beam due to interference between the fastener and the side beam can be reduced.

[0013] In some embodiments, along the direction from the fiber composite mounting plate to the side beam, the surface of the fiber composite mounting plate is flush with or extends beyond the end face of the fastener.

[0014] In this embodiment, it helps to further reduce the possibility of interference between the fastener and the side beam.

[0015] In some embodiments, an adhesive is provided between the fastener and the side of the fiber composite mounting plate facing the side beam.

[0016] In this embodiment, the fasteners are fixedly connected to the side of the fiber composite mounting plate facing the side beam by adhesive bonding, which helps to reduce costs and improve structural strength.

[0017] In some embodiments, along the height direction of the battery cell assembly, one end of the side beam forms a first flange, and one end of the fiber composite mounting plate forms a second flange. Both the first flange and the second flange extend in a direction away from the battery cell assembly, and the first flange and the second flange are fixedly connected. At least a portion of the fasteners are first fasteners, and at least a portion of the first fasteners are fixed to the side of the second flange facing the first flange. The battery device also includes a first adapter, which is connected to the side of the second flange away from the first flange via the first fasteners. The control circuit board is connected to the first adapter.

[0018] In this embodiment, by forming a first flange on the fiber composite mounting plate and adding a first adapter to connect the control circuit board and the first fastener, the difficulty of installing and disassembling the control circuit board is reduced and the connection strength between the control circuit board and the fiber composite mounting plate is improved.

[0019] In some embodiments, the first adapter includes a first piece and a second piece arranged at an angle, the first piece being connected to the side of the second flange opposite to the first flange by the first fastener, and the control circuit board being connected to the second piece.

[0020] In this embodiment, by configuring the first adapter to include a first piece and a second piece arranged at an angle, the manufacturing cost of the first adapter can be reduced while realizing the adapter function.

[0021] In some embodiments, the first adapter has a first connection hole for connecting with the first fastener, the first connection hole extending along the distribution direction of the side beam and the battery cell group to form a strip hole.

[0022] In this embodiment, the first connecting hole is configured to extend along the distribution direction of the side beam and the battery cell group to form a strip-shaped hole. This helps to absorb assembly tolerances and manufacturing tolerances, further reducing the difficulty of operation and improving the success rate of operation.

[0023] In some embodiments, along the height direction of the battery cell assembly, one end of the side beam forms a first flange, and one end of the fiber composite mounting plate forms a second flange. Both the first flange and the second flange extend in a direction away from the battery cell assembly, and the first flange and the second flange are fixedly connected. At least a portion of the fasteners are second fasteners, and along the height direction of the battery cell assembly, the second fasteners are located on the side away from the first flange and the second flange.

[0024] In this embodiment, the second fastener is set on the side away from the first and second flanges along the height direction of the battery cell assembly. This helps to increase the operating angle range of the operating tool and thus reduce the difficulty of operation.

[0025] In some embodiments, the battery device further includes a second adapter connected to the side of the fiber composite mounting plate opposite to the side beam via a second fastener, and the control circuit board is connected to the second adapter.

[0026] In this embodiment, by setting a second adapter, the installation or disassembly operation of the control circuit board can be separated. Taking installation as an example, the installation operation can be separated into two steps: connecting the control circuit board to the second adapter and connecting the second adapter to the second fastener. This reduces the overall operational difficulty.

[0027] In some embodiments, along the height direction of the battery cell assembly, the second adapter includes a third piece and a fourth piece connected to the third piece, the third piece being connected to the fiber composite mounting plate via a second fastener; the battery device includes a mounting member, a gap being formed between the fourth piece and the fiber composite mounting plate, at least a portion of the mounting member being located in the gap, and the control circuit board being connected to the fourth piece via the mounting member.

[0028] In this embodiment, by creating a gap between the fourth piece and the fiber composite mounting plate, and placing at least a portion of the mounting member within the gap, it helps to reduce the probability of interference between the mounting member and the fiber composite mounting plate, and also helps to improve the connection strength between the mounting member and the fiber composite mounting plate.

[0029] In some embodiments, the second adapter has a second connection hole for connecting with the second fastener, the second connection hole extending along the height direction of the battery cell assembly to form a strip-shaped hole.

[0030] In this embodiment, the second connection hole is configured to extend along the height direction of the battery cell assembly to form a strip-shaped hole. This helps to absorb assembly tolerances and manufacturing tolerances, further reducing the difficulty of operation and improving the success rate of operation.

[0031] In some embodiments, the fiber composite mounting plate includes a main body and a connecting portion connected to an end of the main body, the main body covering at least a portion of the terminal post of the battery cell, and the connecting portion being located on the side of the side beam opposite to the battery cell and fixedly connected to the side beam.

[0032] In this embodiment, the main body of the fiber composite mounting plate covers the terminal posts of the battery cell assembly from one side along the height direction. This provides a limiting function for the battery cell assembly in the height direction, thus securing it to the housing assembly. It also resists the expansion force of the battery cells along the height direction (i.e., the third direction). Furthermore, the fiber composite mounting plate helps to share the expansion force of the battery cells with the side beams, improving the deformation resistance of the side beams.

[0033] A second aspect of this application provides an electrical device that includes the battery device described in the first aspect of this application.

[0034] The electrical equipment in this application embodiment has all the beneficial effects of the battery device described in any of the above embodiments, and will not be repeated here.

[0035] In some embodiments, the electrical equipment includes an aircraft. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0037] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0038] Figure 3 This is an exploded schematic diagram of the battery device according to an embodiment of this application;

[0039] Figure 4 This is a partial cross-sectional schematic diagram of the battery device according to an embodiment of this application;

[0040] Figure 5 This is an exploded view of the first adapter, the second adapter, and the control circuit board according to an embodiment of this application;

[0041] Figure 6 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0042] Figure 7 for Figure 2 Enlarged schematic diagram of part B.

[0043] Explanation of reference numerals in the attached figures

[0044] 1000. Aircraft; 100. Battery unit; 1. Battery cell pack; 11. Battery cell; 2. Housing assembly; 21. Side beam; 211. First flange; 22. First wall; 23. Mounting plate; 3. Fiber composite mounting plate; 3a. Main body; 3b. Connecting part; 31. Mounting groove; 32. Second flange; 4. Fastener; 4a. First fastener; 4b. Second fastener; 41. Flange; 42. Threaded part; 5. Control circuit board; 6. First adapter; 6a. First connecting hole; 61. First piece; 62. Second piece; 7. Second adapter; 7a. Second connecting hole; 71. Third piece; 72. Fourth piece; 8. Mounting component; 200. Fuselage. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0047] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0048] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0049] In the description of this application, the orientation or positional relationship of "first direction", "second direction" and "third direction" are based on the orientation or positional relationship shown in the accompanying drawings. Among them, "first direction" is the direction indicated by arrow L1 in the accompanying drawings, "second direction" is the direction indicated by arrow L2 in the accompanying drawings, and "third direction" is the direction indicated by arrow L3 in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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 construed as limitations on the embodiments of this application.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0053] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0054] The battery apparatus 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.

[0055] In some embodiments, a battery cell assembly is typically formed by an array of multiple battery cells.

[0056] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells arranged and fixed together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0057] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0058] 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.

[0059] As an example, battery cell assemblies can also be housed within a housing by directly fixing multiple battery cells to the housing. As an example, the housing may include a first housing and a second housing. The first and second housings are fastened together to form a closed space inside the housing for accommodating the battery cell assemblies. Here, "closed" refers to covering or shutting off; it can be sealed or not sealed. The first housing may be a top cover or a bottom plate.

[0060] 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.

[0061] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle / aircraft's floor, or a portion of the housing may be at least a part of the vehicle / aircraft's crossbeams and longitudinal beams.

[0062] 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.

[0063] The battery cell can be a 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., and the embodiments of this application are not limited to this.

[0064] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. 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.

[0065] In some embodiments, a battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0066] 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. This application does not have any particular limitations.

[0067] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided with one or more.

[0068] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0069] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and aircraft.

[0070] Aircraft generally refer to machines that fly within or outside the atmosphere (space), and can include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0071] In related technologies, to meet reliability requirements, the control circuit boards of battery devices (such as those integrating a cell supervision circuit (CSC) or a battery management unit (BMU)) are often placed inside the enclosure or mounted on the outside of the enclosure. Placing the control circuit board inside the enclosure reduces the energy density of the battery device, potentially failing to meet the lightweight requirements of some electrical devices. Mounting the control circuit board on the outside of the enclosure increases installation complexity and affects reliability.

[0072] In view of this, embodiments of this application provide a battery device, which includes a battery cell pack, a housing assembly, a fiber composite mounting plate, fasteners, and a control circuit board. The housing assembly defines a receiving cavity, in which the battery cell pack is disposed. The housing assembly includes a side beam for constraining the battery cell pack. The fiber composite mounting plate is at least partially located on the side of the side beam opposite to the battery cell pack and is fixedly connected to the side beam. Fasteners are at least partially fixed to the side of the fiber composite mounting plate facing the side beam. The control circuit board is mounted to the side of the fiber composite mounting plate opposite to the side beam via fasteners.

[0073] In the battery device of this embodiment, the control circuit board is mounted on the side beam via a fiber composite mounting plate and fasteners, and is located on the side of the side beam opposite to the battery cell pack. This helps save space in the housing cavity and improves the energy density of the battery device. Furthermore, in this embodiment, the control circuit board is mounted using a fiber composite mounting plate. Compared to directly connecting the control circuit board to the side beam, this helps reduce the number of holes drilled on the side beam, improves the sealing performance of the housing assembly, and the fiber composite mounting plate is made of fiber composite material, which has high strength and low weight, contributing to increased energy density. Furthermore, in this embodiment, the control circuit board is connected to the fiber composite mounting plate using fasteners. The fasteners are at least partially fixed to the side of the fiber composite mounting plate facing the side beam, which helps improve the connection strength between the fasteners and the fiber composite mounting plate, thereby improving the reliability of the control circuit board.

[0074] In summary, the battery device of this embodiment can balance energy density and reliability.

[0075] The battery device in this application embodiment is applied to electrical equipment, which can be vehicles, mobile phones, portable devices, laptops, ships, aircraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Aircraft generally refer to devices that fly within or outside the atmosphere (space), and can include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the aforementioned electrical equipment.

[0076] It should be noted that the technical solutions described in the embodiments of this application are not limited to the electrical equipment described above, but can also be applied to all electrical equipment including battery devices and energy storage devices. However, for the sake of brevity, the following embodiments are all described using aircraft as an example.

[0077] Reference Figure 1 The aircraft 1000 typically includes a battery unit 100 and a fuselage 200, with the battery unit 100 located in the fuselage 200 and providing electrical power to the fuselage 200.

[0078] Reference Figures 2-7 To meet different power demands, the battery device 100 includes a battery cell group 1, which may include multiple battery cells 11. A battery cell 11 is the smallest unit that makes up a battery module or battery device 100. Multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel connections. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 11 is housed within a housing. Alternatively, the battery device 100 can also be composed of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form modules, and then these modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within a housing assembly.

[0079] Reference Figures 2-7 This application provides a battery device 100, which includes a battery cell assembly 1, a housing assembly 2, a fiber composite mounting plate 3, fasteners 4, and a control circuit board 5. The housing assembly 2 defines a receiving cavity, in which the battery cell assembly 1 is disposed. The housing assembly 2 includes a side beam 21 for constraining the battery cell assembly 1. The fiber composite mounting plate 3 is at least partially located on the side of the side beam 21 opposite to the battery cell assembly 1 and is fixedly connected to the side beam 21. The fasteners 4 are at least partially fixed to the side of the fiber composite mounting plate 3 facing the side beam 21. The control circuit board 5 is mounted on the side of the fiber composite mounting plate 3 opposite to the side beam 21 via the fasteners 4.

[0080] The box assembly 2 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres.

[0081] The housing assembly 2 defines a receiving cavity in which the battery cell pack 1 is disposed. The battery cell pack 1 is then mounted to the electrical equipment via the housing assembly 2. As an example, the housing assembly 2 is typically a cuboid structure. Both the length and width directions of the housing assembly 2 are parallel to the horizontal plane, and the length direction of the housing assembly 2 is parallel to the longest side of its cuboid structure. The height direction of the housing assembly 2 is perpendicular to the ground.

[0082] As an example, the battery cell group 1 includes a plurality of battery cells 11 stacked along a first direction. The battery device 100 may include only one battery cell group 1 or may include a plurality of battery cell groups 1, which are distributed along a second direction to form a battery cell array.

[0083] Here, the first direction intersects with the second direction, and both the first and second directions are perpendicular to the third direction, which is the height direction of the battery cell assembly 1. Taking the housing assembly 2 as a cuboid as an example, one of the first and second directions can be the length direction of the housing assembly 2, and the other can be the width direction of the housing assembly 2. The third direction is the height direction of the housing assembly 2.

[0084] As an example, the large surface of the battery cell 11 is perpendicular to the first direction, and the large surfaces of adjacent battery cells 11 in the battery pack are directly or indirectly connected along the first direction. Specifically, the large surface here refers to the surface with the largest area among all the surfaces of the battery cell 11.

[0085] The housing assembly 2 includes a side beam 21, which is specifically used to constrain the battery cell group 1. Here, the side beam 21 can be located on one side of the battery cell group 1 along a first direction or on one side of the battery cell group 1 along a second direction, without limitation. The side beam 21 can directly or indirectly abut against the battery cell 11, or a gap can be formed between the side beam 21 and the battery cell 11, without limitation.

[0086] As an example, the housing assembly 2 includes a first wall 22 and a plurality of side beams 21, wherein two side beams 21 are connected to opposite ends of the first wall 22 along a first direction, and the other two side beams 21 are connected to opposite ends of the first wall 22 along a second direction. The side beams 21 described in the embodiments described below may refer to any one of the aforementioned side beams 21 or a combination thereof.

[0087] The first wall 22 is used to support the battery cell 11. Specifically, supporting means bearing the weight of the battery cell 11. That is, the first wall 22 is located on the bottom side of the battery cell 11 along the direction of gravity.

[0088] The structure of the side beam 21 is not limited. As an example, the side beam 21 includes a laminated insulating structure layer and a fiber composite material layer (not shown in the figure), with at least part of the insulating structure layer located between the fiber composite material layer and the battery cell 11.

[0089] Here, the insulating structure layer and the fiber composite material layer are stacked, specifically, both the insulating structure layer and the fiber composite material layer are plate-shaped structures. When projected along the thickness direction of the plate-shaped structure, the projections of the insulating structure layer and the fiber composite material layer overlap at least partially, so that the insulating structure layer and the fiber composite material layer are stacked together to form an integral laminate.

[0090] The insulating structural layer can be made of a single material or of fiber composites or other composite materials. The fiber composite layer is made of fiber composite materials.

[0091] The main difference between the insulating structural layer and the fiber composite layer is that the insulating structural layer is insulating at least on the side surface facing the battery cell 11, while the fiber composite layer may be non-insulating or partially or completely insulating.

[0092] In an example where both the insulating structural layer and the fiber composite layer are made of fiber composite materials, the fibers in the insulating structural layer and the fiber composite layer can be the same, such as at least one of glass fiber, basalt fiber, aramid fiber, ceramic fiber, carbon fiber, and polyethylene fiber. In this embodiment, if the fibers in the fiber composite layer of the insulating structural layer include carbon fiber or other conductive fibers, an insulating coating can be applied to the side of the insulating structural layer facing the battery cell 11 to achieve insulation.

[0093] The fibers in the insulating structural layer and the fiber composite layer can also be different. For example, the fibers in the fiber composite of the insulating structural layer can include at least one of glass fiber, basalt fiber, and aramid fiber. All of these fibers are insulating fibers. Therefore, in this embodiment, the insulating structural layer does not need to be provided with an insulating coating. The fibers in the fiber composite of the fiber composite layer can include at least one of carbon fiber and polyethylene fiber.

[0094] In the above example, the fiber composite material layer provides good structural strength, and the insulating structure layer is located between the fiber composite material layer and the battery cell 11. The insulating structure layer not only supports the battery cell 11, but also electrically isolates the battery cell 11 from the outside world, reducing external interference to the battery cell 11. The combination of the insulating structure layer and the fiber composite material layer allows the housing assembly 2 to take into account both structural strength and protective performance.

[0095] Of course, in some other examples, the side beam 21 can also be a metal beam or a beam structure made of other materials.

[0096] The fiber composite mounting plate 3 is located at least partially on the side of the side beam 21 opposite to the battery cell pack 1 and is fixedly connected to the side beam 21. Here, the fiber composite mounting plate 3 specifically refers to a plate-like structure made of at least a portion of fiber composite material.

[0097] As an example, the fiber composite material of the fiber composite mounting plate 3 includes a reinforcing phase and a matrix phase. The reinforcing phase includes fibers selected from at least one of glass fiber, basalt fiber, aramid fiber, carbon fiber, and polyethylene fiber. The matrix phase includes at least one of polyurethane, epoxy resin, phenolic resin, polyamide resin, and ceramizable resin.

[0098] The fiber composite mounting plate 3 can be located only partially on the side of the side beam 21 away from the battery cell pack 1, or it can be located entirely on the side of the side beam 21 away from the battery cell pack 1; there is no restriction on this.

[0099] The specific structural form and dimensions of the fiber composite board can be determined by those skilled in the art based on the actual installation requirements of the control circuit board 5, and no restrictions are imposed on this.

[0100] As an example, the side beam 21 is located on one side of the battery cell pack 1 along a first direction, and at least a portion of the fiber composite mounting plate 3 is located on the side of the side beam 21 opposite to the battery cell pack 1 along the first direction, with the thickness direction of the fiber composite mounting plate 3 being the first direction. The fiber composite plate extends to one or both ends of the side beam 21 along a third direction and / or the fiber composite plate extends to one or both ends of the side beam 21 along a second direction.

[0101] The fiber composite mounting plate 3 is fixedly connected to the side beam 21. The specific methods of fixing are not limited to bonding and welding.

[0102] The control circuit board 5 is mounted on the side of the fiber composite mounting plate 3 opposite to the side beam 21 by fasteners 4. Here, the control circuit board 5 specifically refers to a circuit board structure that integrates units including but not limited to the cell supervision circuit (CSC) and the battery management unit (BMU).

[0103] It is understood that the thickness directions of the control circuit board 5 and the fiber composite mounting plate 3 are the same. Taking the side beam 21 located on one side of the battery cell pack 1 along the first direction as an example, the thickness directions of the fiber composite mounting plate 3 and the control circuit board 5 are both the first direction.

[0104] At least a portion of the fastener 4 is fixed to the side of the fiber composite mounting plate 3 facing the side beam 21. It is understood that, unlike conventional metal plates, the fiber composite mounting plate 3 cannot be directly connected to the fastener 4 by high-strength connection methods such as riveting or welding. Therefore, in this embodiment, at least a portion of the fastener 4 is fixed to the side of the fiber composite mounting plate 3 facing the side beam 21, thereby improving the connection strength between the fastener 4 and the fiber composite mounting plate 3.

[0105] The specific structural form of the fastener 4 is not limited. As an example, the fastener 4 includes a stud, and a through hole can be formed on the fiber composite mounting plate 3. The fastener 4 can pass through the through hole, such that a portion of the fastener 4 is located on the side of the fiber composite mounting plate 3 facing the side beam 21, and another portion is located on the side of the fiber composite mounting plate 3 away from the side beam 21. As another example, the fastener 4 includes a nut, which is located on the side of the fiber composite mounting plate 3 facing the side beam 21. The fiber composite mounting plate 3 forms a through hole, through which the control circuit board 5 can be connected to the nut.

[0106] The fastener 4 can be one or more. Taking the side beam 21 as an example, which is set on one side of the battery cell pack 1 along the first direction, at least some of the multiple fasteners 4 can be distributed along the second direction and / or at least some of the multiple fasteners 4 can be distributed along the third direction. Those skilled in the art can determine the specific distribution according to the actual connection strength requirements.

[0107] The fastener 4 can be fixedly connected to the fiber composite mounting plate 3 in any way, such as by bonding or snap-fitting.

[0108] In the battery device 100 of this embodiment, the control circuit board 5 is mounted on the side beam 21 via a fiber composite mounting plate and fasteners 4, and is located on the side of the side beam 21 opposite to the battery cell assembly 1. This helps to save space in the housing cavity and improve the energy density of the battery device 100. Furthermore, in this embodiment, the control circuit board 5 is mounted using a fiber composite mounting plate. Compared to directly connecting the control circuit board 5 to the side beam 21, this helps to reduce the number of holes drilled on the side beam 21, improves the sealing performance of the housing assembly 2, and the fiber composite mounting plate is made of fiber composite material, which has high strength and low weight, contributing to increased energy density. Furthermore, in this embodiment, the control circuit board 5 is connected to the fiber composite mounting plate 3 using fasteners 4. The fasteners 4 are at least partially fixed to the side of the fiber composite mounting plate 3 facing the side beam 21, which helps to improve the connection strength between the fasteners 4 and the fiber composite mounting plate 3, thereby improving the reliability of the control circuit board 5.

[0109] In some embodiments, refer to Figure 3 , Figure 4 and Figure 6 The fastener 4 includes a stud, which includes a threaded portion 42 and a flange portion 41. The fiber composite mounting plate 3 is provided with a through hole. The flange portion 41 is fixed to the side of the fiber composite mounting plate 3 facing the side beam 21 and is fixedly connected to the side of the fiber composite mounting plate 3 facing the side beam 21. The threaded portion 42 passes through the through hole and protrudes from the side of the fiber composite mounting plate 3 away from the side beam 21.

[0110] The fixing connection between flange 41 and fiber composite mounting plate 3 is not limited, such as bonding, snap-fitting, etc.

[0111] As an example, an adhesive is provided between the flange 41 and the fiber composite mounting plate 3. The specific composition of the adhesive is not limited. The flange 41 and the fiber composite mounting plate 3 are fixedly connected by adhesive, which improves the connection strength and reduces costs. Furthermore, in embodiments where an adhesive is provided between the flange 41 and the fiber composite mounting plate 3, the diameter of the flange 41 is not less than 12mm, such as 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, etc. This increases the bonding area between the flange 41 and the fiber composite mounting plate 3, thereby better meeting the requirements for bonding strength.

[0112] In this embodiment, the flange portion 41 of the stud is fixedly connected to the side of the fiber composite mounting plate 3 facing the side beam 21, which helps to further improve the connection strength between the fastener 4 and the fiber composite mounting plate 3.

[0113] Alternatively, in some other embodiments, the fastener 4 includes a nut that is fixed to the side of the fiber composite mounting plate 3 facing the side beam 21 and is fixedly connected to the side of the fiber composite mounting plate 3 facing the side beam 21.

[0114] Similar to studs, nuts can also be fixedly connected to the fiber composite mounting plate 3 by adhesive bonding. In this embodiment, through holes are formed on the fiber composite mounting plate 3, through which studs and other structures on the control circuit board 5 can pass and connect to the nuts.

[0115] In this embodiment, the nut is fixedly connected to the side of the fiber composite mounting plate 3 facing the side beam 21, which helps to further improve the connection strength between the fastener 4 and the fiber composite mounting plate 3.

[0116] In some embodiments, refer to Figure 6 The fiber composite mounting plate 3 forms a mounting groove 31 on the side facing the side beam 21, and at least a portion of the fastener 4 is located in the mounting groove 31.

[0117] Taking fastener 4 as a stud, which includes a flange portion 41 and a threaded portion 42, at least a portion of the flange portion 41 is located within the mounting groove 31. Taking fastener 4 as a nut, at least a portion of the nut is located within the mounting groove 31.

[0118] The mounting groove 31 can be formed on the side of the fiber composite mounting plate 3 facing the side beam 21 by means such as stamping.

[0119] In this embodiment, by placing at least a portion of the fastener 4 within the mounting groove 31, the possibility of interference between the fastener 4 and the side beam 21 can be reduced. In particular, in embodiments where the side beam 21 includes a fiber composite material layer and an insulating structure layer, the probability of surface defects in the side beam 21 caused by interference between the fastener 4 and the side beam 21 can be reduced.

[0120] In some embodiments, specifically, along the direction from the fiber composite mounting plate 3 to the side beam 21, the surface of the fiber composite mounting plate 3 is flush with or extends beyond the end face of the fastener 4.

[0121] Taking fastener 4 as a stud, which includes a flange portion 41 and a threaded portion 42 as an example, along the direction from the fiber composite mounting plate 3 to the side beam 21, the surface of the fiber composite mounting plate 3 is flush with or extends beyond the end face of the flange portion 41.

[0122] Taking fastener 4 as an example of a nut, along the direction from the fiber composite mounting plate 3 to the side beam 21, the surface of the fiber composite mounting plate 3 is flush with or extends beyond the end face of the nut.

[0123] In this embodiment, it helps to further reduce the possibility of interference between the fastener 4 and the side beam 21.

[0124] In some embodiments, an adhesive is provided between the fastener 4 and the side of the fiber composite mounting plate 3 facing the side beam 21. The specific composition of the adhesive is not limited here.

[0125] As mentioned above, in embodiments where the fastener 4 includes a stud, the adhesive is disposed between the flange 41 and the side of the fiber composite mounting plate 3 facing the side beam 21. In embodiments where the fastener 4 includes a nut, the adhesive is disposed between the nut and the side of the fiber composite mounting plate 3 facing the side beam 21.

[0126] In this embodiment, the fastener 4 is fixedly connected to the side of the fiber composite mounting plate 3 facing the side beam 21 by adhesive bonding, which helps to reduce costs and improve structural strength.

[0127] In some embodiments, refer to Figure 3 , Figure 4 and Figure 7 Along the height direction (i.e., the third direction) of the battery cell assembly 1, one end of the side beam 21 forms a first flange 211, and one end of the fiber composite mounting plate 3 forms a second flange 32. Both the first flange 211 and the second flange 32 extend in a direction away from the battery cell assembly 1, and the first flange 211 and the second flange 32 are fixedly connected. At least a portion of the fasteners 4 are first fasteners 4a, and at least a portion of the first fasteners 4a are fixed to the side of the second flange 32 facing the first flange 211. The battery device 100 also includes a first adapter 6, which is connected to the side of the second flange 32 away from the first flange 211 via the first fasteners 4a. The control circuit board 5 is connected to the first adapter 6.

[0128] The first flange 211 of the side beam 21 can be used to connect with the external structure or other structures of the housing assembly 2, or the first flange 211 can be used only to connect with the second flange 32. As mentioned above, an adhesive can be provided between the first flange 211 and the second flange 32, that is, the first flange 211 and the second flange 32 are fixedly connected by adhesive.

[0129] The first flange 211 and the second flange 32 are specifically distributed along the height direction of the battery cell assembly 1, and at least a portion of the first fastener 4a is located on the side of the first flange 211 facing the second flange 32. As mentioned above, in some embodiments, the first fastener 4a is a stud, including a threaded portion 42 and a flange portion 41, the flange portion 41 being located between the first flange 211 and the second flange 32. In some embodiments, the first fastener 4a is a nut, and is located between the first flange 211 and the second flange 32.

[0130] In some embodiments, a mounting groove 31 may be formed on the side of the second flange 32 facing the first flange 211, and at least a portion of the first fastener 4a is located within the mounting groove 31, thereby reducing the possibility of interference between the first fastener 4a and the first flange 211. Furthermore, in some embodiments, along the direction from the second flange 32 to the first flange 211, the surface of the second flange 32 is flush with or extends beyond the end face of the first fastener 4a.

[0131] It is understandable that the side of the side beam 21 facing away from the battery cell pack 1 is often obscured by other structures or external structures of the housing assembly 2, for example, referring to Figure 4 In some embodiments, the housing assembly 2 includes a mounting plate 23, which is located on the side of the side beam 21 away from the battery cell group 1 and is spaced apart from and opposite to the side beam 21. The mounting plate 23 is connected to a first flange 211, and a mounting cavity is formed between the mounting plate 23, the first flange 211 and the side beam 21. The first flange 211 forms one side cavity wall of the mounting cavity along the height direction of the battery cell group 1, and the mounting cavity forms an opening on the other side along the height direction of the battery cell group 1.

[0132] In this situation, the tools used for installing (or removing) the control circuit board 5, such as soldering guns and screwdrivers, can usually only approach the operating part from the height of the battery cell pack 1, which greatly limits the operating angle of the tools. Figure 5 For example, the operating tools can only be used from... Figure 5 The opening on the top side of the mounting cavity extends into the mounting cavity, and the tilt angle of the operating tool is limited by the hanging wall, making it difficult to reach the bottom side of the fiber composite mounting plate 3 and complete the installation.

[0133] Therefore, in this embodiment, the fiber composite mounting plate 3 is provided with a second flange 32, which is fixedly connected to the first flange 211 of the expansion beam. The first fastener 4a is connected to the first flange 211. In this way, during actual installation and disassembly, the probability of interference between the operating tools and the side beam 21 and other structures on the side of the side beam 21 away from the battery cell pack 1 can be reduced, thus reducing the difficulty of operation.

[0134] It should be noted that, Figure 4 The embodiment shown is merely one scenario that may lead to the aforementioned problems. In reality, the same problems will occur when the side beam 21 facing away from the battery cell pack 1 is obscured by other structures. Furthermore, even in the embodiment where the mounting plate 23 is provided on the side beam 21 facing away from the battery cell pack 1, the connection method between the mounting plate 23 and the side beam 21 is not limited to... Figure 5The connection method shown in the figure is, for example, the mounting plate 23 can be connected to the side beam 21 through other structures other than the first flange 211. The first flange 211 only serves to support the first flange 211 and is not connected to the mounting plate 23.

[0135] The number of first fasteners 4a can be one or more. Taking the side beam 21 set on one side of the battery cell pack 1 along the first direction as an example, multiple first fasteners 4a can be distributed along the second direction.

[0136] Furthermore, it can be understood that in this embodiment, if the first fastener 4a includes a stud, the stud will extend approximately along a third direction; if the first fastener 4a includes a nut, a stud extending approximately along a third direction is also required to cooperate with it. However, the control circuit board 5 itself is a plate-shaped structure with its thickness direction approximately perpendicular to the third direction, so there may be a problem that the first fastener 4a is difficult to directly form a fixed connection with the control circuit board 5.

[0137] To address this, in this embodiment, a first adapter 6 is further provided. The control circuit board 5 is connected to the first fastener 4a via the first adapter 6, thereby solving the problem of difficulty in directly connecting the first fastener 4a and the control circuit board 5. Furthermore, by providing the first adapter 6, the installation or removal operation of the control circuit board 5 can be separated. Taking installation as an example, the installation operation can be divided into two steps: connecting the control circuit board 5 to the first adapter 6 and connecting the first adapter 6 to the first fastener 4a, thus reducing the overall operational difficulty.

[0138] The specific structure of the first adapter 6 is not limited. In the actual installation process, the control circuit board 5 can be connected to the first adapter 6 first, and then the first adapter 6 can be connected to the first fastener 4a.

[0139] In this embodiment, by forming a first flange 211 on the fiber composite mounting plate 3 and adding a first adapter 6 to connect the control circuit board 5 and the first fastener 4a, the difficulty of installing and disassembling the control circuit board 5 is reduced and the connection strength between the control circuit board 5 and the fiber composite mounting plate 3 is improved.

[0140] In some embodiments, refer to Figure 5 and Figure 7 The first adapter 6 includes a first piece 61 and a second piece 62 set at an angle. The first piece 61 is connected to the side of the second flange 32 away from the first flange 211 by a first fastener 4a, and the control circuit board 5 is connected to the second piece 62.

[0141] Here, the specific angle between the first piece 61 and the second piece 62 is not limited. As an example, the surface of the first piece 61 along the thickness direction is approximately parallel to the surface of the second flange 32 along the thickness direction, and the surface of the second piece 62 along the thickness direction is approximately parallel to the surface of the control circuit board 5 along the thickness direction. In this way, the degree of fit between the first adapter 6 and the second adapter 7 and the fiber composite mounting plate 3 and the control circuit board 5 is improved, thereby improving the connection strength and stability.

[0142] The first piece 61 and the second piece 62 can be metal parts, or structures made of fiber composite materials or any other suitable materials, without limitation.

[0143] The first piece 61 and the second piece 62 can be directly connected or indirectly connected through other intermediate structures. As mentioned above, there may be multiple first fasteners 4a. In this case, the first piece 61 can be set to correspond one-to-one with the first fasteners 4a, or one first piece 61 can correspond to multiple first fasteners 4a.

[0144] Taking the first fastener 4a as a stud as an example, a through hole can be formed on the first plate 61, and the threaded portion 42 of the stud passes through the through hole, thereby fixing the first plate 61 and the second flange 32 together. Taking the first fastener 4a as a nut as an example, a through hole can be formed on the first plate 61, and the first adapter 6 can include a stud structure, with the stud structure passing through the through hole on the first plate 61 and the nut, thereby fixing the first plate 61 and the second flange 32 together.

[0145] The specific connection method between the second piece 62 and the control circuit board 5 is not limited, such as bonding, snap-fitting, welding, threaded connection, etc.

[0146] In this embodiment, by configuring the first adapter 6 to include a first piece 61 and a second piece 62 arranged at an angle, the manufacturing cost of the first adapter 6 can be reduced while realizing the adapter function.

[0147] It should be noted that the optional structure of the first adapter 6 is not limited to this; any structure that can achieve the above-mentioned adapter function can be used as the first adapter 6.

[0148] In some embodiments, refer to Figure 7 The first adapter 6 has a first connection hole 6a for connecting with the first fastener 4a. The first connection hole 6a extends along the distribution direction of the side beam 21 and the battery cell group 1 to form a strip hole.

[0149] Taking the first adapter 6, which includes a first piece 61 and a second piece 62, as an example, a first connecting hole 6a is formed in the first piece 61. Taking the side beam 21, which is disposed on one side of the battery cell pack 1 along the first direction, as an example, the first connecting hole 6a extends along the first direction to form a strip-shaped hole.

[0150] In this embodiment, the first connecting hole 6a is configured to extend along the distribution direction of the side beam 21 and the battery cell group 1 to form a strip-shaped hole. This helps to absorb assembly tolerances and manufacturing tolerances, further reducing the difficulty of operation and improving the success rate of operation.

[0151] In some embodiments, as mentioned above, along the height direction of the battery cell assembly 1, one end of the side beam 21 forms a first flange 211, and one end of the fiber composite mounting plate 3 forms a second flange 32. Both the first flange 211 and the second flange 32 extend in a direction away from the battery cell assembly 1, and the first flange 211 and the second flange 32 are fixedly connected.

[0152] In this embodiment, as a supplement or alternative, at least a portion of the fasteners 4 are second fasteners 4b, located on the side away from the first flange 211 and the second flange 32 along the height direction of the battery cell assembly 1.

[0153] As mentioned above, in this embodiment, the operating angle of the operating tool is limited near the first flange 211 and the second flange 32. Therefore, in this embodiment, the second fastener 4b is set on the side away from the first flange 211 and the second flange 32 along the height direction of the battery cell group 1. This helps to increase the operating angle range of the operating tool and thus reduce the difficulty of operation.

[0154] Still with Figure 5 Taking the embodiment shown in the figure as an example, the second fastener 4b can be specifically set at a position close to the opening of the mounting cavity.

[0155] It is understood that in this embodiment, only the first fastener 4a described above may be set, only the second fastener 4b may be set, or both the first fastener 4a and the second fastener 4b may be set. Those skilled in the art can determine the specific requirements based on the actual installation needs of the control circuit board 5.

[0156] The advantage of simultaneously setting the first fastener 4a and the second fastener 4b is that they can provide fixation for both sides of the control circuit board 5 along the height direction of the battery cell group 1, further improving the connection strength and stability.

[0157] In some embodiments, refer to Figure 6The battery device 100 also includes a second adapter 7, which is connected to the side of the fiber composite mounting plate 3 away from the side beam 21 by a second fastener 4b, and the control circuit board 5 is connected to the second adapter 7.

[0158] Here, the specific structural form of the second adapter 7 is not limited. As an example, the second adapter 7 is a sheet structure with through holes for connecting with the first fastener 4a and through holes for connecting with the control circuit board 5.

[0159] The second adapter 7 can be a metal part, or a structure made of fiber composite material or any other suitable material, without limitation.

[0160] In this embodiment, by setting the second adapter 7, the installation or disassembly operation of the control circuit board 5 can be separated. Taking installation as an example, the installation operation can be separated into two steps: connecting the control circuit board 5 to the second adapter 7 and connecting the second adapter 7 to the second fastener 4b. This reduces the overall operation difficulty.

[0161] In some embodiments, refer to Figure 4 and Figure 6 Along the height direction of the battery cell pack 1, the second adapter 7 includes a third piece 71 and a fourth piece 72 connected to the third piece 71. The third piece 71 is connected to the fiber composite mounting plate 3 by a second fastener 4b. The battery device 100 includes a mounting member 8. A gap is formed between the fourth piece 72 and the fiber composite mounting plate 3. At least a portion of the mounting member 8 is located in the gap. The control circuit board 5 is connected to the fourth piece 72 through the mounting member 8.

[0162] Here, the fourth piece 72 can be located on the side of the third piece 71 closer to the first flange 211 and the second flange 32, or it can be located on the side of the third piece 71 farther away from the first flange 211 and the second flange 32. As an example, the fourth piece 72 is located on the side of the third piece 71 closer to the first flange 211 and the second flange 32. This helps to offset the control circuit board 5 and the second fastener 4b from each other along the height direction of the battery cell 11, reducing the possibility of interference between them.

[0163] The thickness directions of the third piece 71 and the fourth piece 72 can both be parallel to the thickness direction of the fiber composite mounting plate 3.

[0164] The specific structure of the mounting component 8 is not limited, as long as the control circuit board 5 can be connected to the fourth piece 72 through the mounting component 8. A gap is formed between the fourth piece 72 and the fiber composite mounting plate 3, and at least a portion of the mounting component 8 is located within this gap.

[0165] As an example, the mounting component 8 includes a stud, which comprises a flange and a threaded portion. The flange is located in the aforementioned gap, and a through hole is formed on the fourth piece 72. The threaded portion passes through the through hole and protrudes from the side of the fourth piece 72 opposite to the fiber composite mounting plate 3. Alternatively, the mounting component includes a nut, which is located in the aforementioned gap.

[0166] In this embodiment, a gap can be formed between the fourth sheet 72 and the fiber composite mounting plate 3 by means of stamping, thinning the fourth sheet 72, or setting a bending structure between the third sheet 71 and the fourth sheet 72.

[0167] Similar to fastener 4, an adhesive can be provided between mounting part 8 and fourth piece 72, that is, mounting part 8 can be fixedly connected to fourth piece 72 by adhesive bonding, thereby improving the connection strength.

[0168] In this embodiment, by creating a gap between the fourth piece 72 and the fiber composite mounting plate 3, and placing at least a portion of the mounting member 8 within the gap, it helps to reduce the probability of interference between the mounting member 8 and the fiber composite mounting plate 3, and also helps to improve the connection strength between the mounting member 8 and the fiber composite mounting plate 3.

[0169] In some embodiments, still refer to Figure 6 The second adapter 7 has a second connection hole 7a for connecting with the second fastener 4b, and the second connection hole 7a extends along the height direction of the battery cell pack 1 to form a strip hole.

[0170] Taking the second adapter piece as an example, which includes a third piece 71 and a fourth piece 72, the second connecting hole 7a is formed in the third piece 71.

[0171] In this embodiment, the second connection hole 7a is set to extend along the height direction of the battery cell group 1 to form a strip hole. This helps to absorb assembly tolerances and manufacturing tolerances, further reducing the difficulty of operation and improving the success rate of operation.

[0172] In some embodiments, refer to Figure 3 The fiber composite mounting plate 3 includes a main body 3a and a connecting part 3b connected to the end of the main body 3a. The main body 3a covers at least part of the terminal post of the battery cell 11, and the connecting part 3b is located on the side of the side beam 21 away from the battery cell group 1 and is fixedly connected to the side beam 21.

[0173] It is understood that in this embodiment, the control circuit board 5 is installed on the side of the connecting part 3b away from the side beam 21.

[0174] Taking a side beam 21 located on one side of the battery cell pack 1 along the first direction as an example, the connecting part 3b is connected to the end of the main body 3a along the first direction. In the case where the housing assembly 2 includes two side beams 21 arranged opposite each other along the first direction, the fiber composite mounting plate 3 may include two connecting parts 3b, respectively connected to both ends of the main body 3a along the first direction. In this case, the control circuit board 5 may be connected to one of the connecting parts 3b on the side opposite to the side beam 21.

[0175] Taking the housing assembly 2 including the first wall 22 as an example, the main body 3a specifically covers the terminal post of the battery cell assembly 1 from the side away from the first wall 22 along the height direction (that is, the third direction) of the battery cell assembly 1.

[0176] It should be noted that the main body 3a covering the battery cell pack 1 can mean that the main body 3a covers only a portion of the battery cell pack 1, i.e., when projected along a third direction (the height direction of the battery cell pack 1), the projection of the main body 3a partially overlaps with the projection of the battery cell pack 1; or, the main body 3a covers the entire battery cell pack 1, i.e., when projected along a third direction, the projection of the main body 3a completely overlaps with the projection of the battery cell pack 1. Furthermore, the main body 3a can cover one or more battery cell packs 1.

[0177] In this embodiment, the main body 3a of the fiber composite mounting plate 3 covers the terminal post of the battery cell assembly 1 from one side in the height direction of the battery cell assembly 1. This provides a limiting position for the battery cell assembly 1 in the height direction, thereby fixing the battery cell assembly 1 to the housing assembly 2. It also resists the expansion force of the battery cell 11 in the height direction (i.e., the third direction). In addition, the fiber composite mounting plate 3 also helps to share the expansion force of the battery cell 11 with the side beam 21, improving the deformation resistance of the side beam 21.

[0178] Embodiments of this application also provide an electrical device that includes the battery device 100 described in any of the above embodiments. The electrical device of this application has all the advantages of the battery device 100 described in any of the above embodiments, which will not be repeated here.

[0179] In some embodiments, the electrical equipment includes an aircraft 1000, which generally refers to a device that flies within or outside the atmosphere (space), and may include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft may include airplanes, airships, etc., and for example, may be a low-altitude aircraft 1000, an eVTOL (electric vertical take-off and landing) aircraft 1000, a commuter aircraft, a regional jet, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0180] The battery device 100100 and the electrical equipment in one or more of the embodiments above will be described in more detail and specific way with reference to a specific embodiment.

[0181] Reference Figures 1-7 The electrical device in this application embodiment includes an aircraft 1000. By providing a battery device 100 on the aircraft 1000, the battery device 100 can provide electrical power to the aircraft 1000 so that the aircraft 1000 can fly.

[0182] Here, "aircraft 1000" generally refers to a device that flies within or outside the atmosphere (space), and can include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., and for example, it can be a low-altitude aircraft 1000, an eVTOL (electric vertical take-off and landing) aircraft 1000, a commuter aircraft, a regional jet, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. For example, aircraft 1000 is a cargo drone.

[0183] The battery device 100 is installed on the aircraft 1000 and is used to provide electrical energy to the aircraft 1000. The battery device 100 includes a housing assembly 2 and a battery cell array. The housing assembly 2 forms a receiving cavity. A cover can be connected to the housing assembly 2 to seal the receiving cavity. The battery cell array is disposed in the receiving cavity.

[0184] The battery cell array includes at least two battery cell groups 1, each battery cell group 1 including multiple battery cells 11. The at least two battery cell groups 1 are arranged sequentially along a second direction. Multiple battery cells 11 in the same battery cell group 1 are arranged along a first direction. The battery cells 11 are approximately cuboid in shape, and the surface of the battery cell 11 with the largest area is perpendicular to the first direction. The height direction of the battery cell 11 is set along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0185] The housing assembly 2 includes side beams 21 for constraining the battery cell pack 1. In some embodiments, the housing assembly 2 includes two side beams 21 disposed opposite to each other along a first direction.

[0186] The battery assembly 100 includes a fiber composite mounting plate 3, fasteners 4, and a control circuit board 5.

[0187] The fiber composite mounting plate 3 is at least partially located on the side of the side beam 21 away from the battery cell pack 1 and is fixedly connected to the side beam 21. The fastener 4 is at least partially fixed on the side of the fiber composite mounting plate 3 facing the side beam 21. The control circuit board 5 is mounted on the side of the fiber composite mounting plate 3 away from the side beam 21 by means of the fastener 4.

[0188] In some embodiments, the fiber composite mounting plate 3 specifically includes a main body 3a and a connecting portion 3b connected to the end of the main body 3a. The main body 3a covers at least a portion of the terminal posts of the battery cells 11, and the connecting portion 3b is located on the side of the side beam 21 opposite to the battery cell group 1 and is fixedly connected to the side beam 21. The control circuit board 5 is mounted on the side of the connecting portion 3b opposite to the side beam 21 by fasteners 4.

[0189] Fastener 4 includes a stud, which comprises a threaded portion 42 and a flange portion 41. A through hole is provided on the fiber composite mounting plate 3. The flange portion 41 is fixed to the side of the fiber composite mounting plate 3 facing the side beam 21 and is fixedly connected to the side of the fiber composite mounting plate 3 facing the side beam 21. The threaded portion 42 passes through the through hole and protrudes from the side of the fiber composite mounting plate 3 opposite to the side beam 21. Specifically, an adhesive is provided between the flange portion 41 of the fastener 4 and the side of the fiber composite mounting plate 3 facing the side beam 21.

[0190] A mounting groove 31 is formed on the side of the fiber composite mounting plate 3 facing the side beam 21, and at least a portion of the flange portion 41 of the fastener 4 is located within the mounting groove 31. Along the direction of the fiber composite mounting plate 3 towards the side beam 21, the surface of the fiber composite mounting plate 3 is flush with or extends beyond the end face of the flange portion 41.

[0191] There are multiple fasteners 4, one part of which is the first fastener 4a, and the other part of which is the second fastener 4b.

[0192] Along the height direction of the battery cell assembly 1 (i.e., the third direction), one end of the side beam 21 forms a first flange 211, and one end of the fiber composite mounting plate 3 forms a second flange 32. Both the first flange 211 and the second flange 32 extend in a direction away from the battery cell assembly 1, and the first flange 211 and the second flange 32 are fixedly connected. At least a portion of the first fastener 4a is fixed to the side of the second flange 32 facing the first flange 211, and along the height direction of the battery cell assembly 1, the second fastener 4b is located on the side away from the first flange 211 and the second flange 32.

[0193] The battery device 100 also includes a first adapter 6 and a second adapter 7.

[0194] The first adapter 6 is connected to the side of the second flange 32 opposite to the first flange 211 via the first fastener 4a, and the control circuit board 5 is connected to the first adapter 6. The first adapter 6 includes a first piece 61 and a second piece 62 arranged at an angle. The first piece 61 is connected to the side of the second flange 32 opposite to the first flange 211 via the first fastener 4a, and the control circuit board 5 is connected to the second piece 62. The first piece 61 has a first connection hole 6a for connecting with the first fastener 4a. The first connection hole 6a extends along the distribution direction of the side beam 21 and the battery cell group 1 to form a strip hole.

[0195] The second adapter 7 is connected to the side of the fiber composite mounting plate 3 opposite to the side beam 21 via the second fastener 4b, and the control circuit board 5 is connected to the second adapter 7. Along the height direction of the battery cell assembly 1, the second adapter 7 includes a third piece 71 and a fourth piece 72 connected to the third piece 71. The third piece 71 is connected to the fiber composite mounting plate 3 via the second fastener 4b. The battery assembly 100 includes a mounting member 8, with a gap formed between the fourth piece 72 and the fiber composite mounting plate 3. At least a portion of the mounting member 8 is located in the gap, and the control circuit board 5 is connected to the fourth piece 72 via the mounting member 8. The third piece 71 has a second connection hole 7a for connection with the second fastener 4b, and the second connection hole 7a extends along the height direction of the battery cell assembly 1 to form a strip-shaped hole.

[0196] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0197] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, The battery device includes: Battery cell pack; A housing assembly for defining a receiving cavity, wherein the battery cell assembly is disposed in the receiving cavity, the housing assembly including side beams for constraining the battery cell assembly; A fiber composite mounting plate, wherein at least a portion of the fiber composite mounting plate is located on the side of the side beam opposite to the battery cell assembly, and is fixedly connected to the side beam; Fasteners, at least a portion of which are secured to the side of the fiber composite mounting plate facing the side beam; and The control circuit board is mounted on the side of the fiber composite mounting plate away from the side beam by the fasteners.

2. The battery device according to claim 1, characterized in that, The fastener includes a stud, which includes a threaded portion and a flange portion. The fiber composite mounting plate has a through hole. The flange portion is fixed to the side of the fiber composite mounting plate facing the side beam and is fixedly connected to the side of the fiber composite mounting plate facing the side beam. The threaded portion passes through the through hole and protrudes from the side of the fiber composite mounting plate away from the side beam.

3. The battery device according to claim 1, characterized in that, The fastener includes a nut, which is fixed to the side of the fiber composite mounting plate facing the side beam and is fixedly connected to the side of the fiber composite mounting plate facing the side beam.

4. The battery device according to any one of claims 1 to 3, characterized by, The fiber composite mounting plate has a mounting groove on the side facing the side beam, and at least a portion of the fastener is located within the mounting groove.

5. The battery device according to claim 4, characterized in that, Along the direction from the fiber composite mounting plate to the side beam, the surface of the fiber composite mounting plate is flush with or extends beyond the end face of the fastener.

6. The battery device according to any one of claims 1 to 5, wherein An adhesive is provided between the fastener and the side of the fiber composite mounting plate facing the side beam.

7. The battery device according to any one of claims 1-6, characterized in that, Along the height direction of the battery cell assembly, one end of the side beam forms a first flange, and one end of the fiber composite mounting plate forms a second flange. Both the first flange and the second flange extend in a direction away from the battery cell assembly, and the first flange and the second flange are fixedly connected. At least a portion of the fasteners are first fasteners, and at least a portion of the first fasteners are fixed to the side of the second flange facing the first flange. The battery device also includes a first adapter, which is connected to the side of the second flange away from the first flange via the first fasteners. The control circuit board is connected to the first adapter.

8. The battery device according to claim 7, characterized in that, The first adapter includes a first piece and a second piece arranged at an angle. The first piece is connected to the side of the second flange opposite to the first flange by the first fastener. The control circuit board is connected to the second piece.

9. The battery device according to claim 7 or 8, characterized in that, The first adapter has a first connection hole for connecting with the first fastener, the first connection hole extending along the distribution direction of the side beam and the battery cell group to form a strip hole.

10. The battery device according to any one of claims 1-9, wherein, Along the height direction of the battery cell assembly, one end of the side beam forms a first flange, and one end of the fiber composite mounting plate forms a second flange. Both the first flange and the second flange extend in a direction away from the battery cell assembly, and the first flange and the second flange are fixedly connected. At least a portion of the fasteners are second fasteners, located on a side away from the first flange and the second flange along the height direction of the battery cell assembly.

11. The battery device of claim 10, wherein, The battery device further includes a second adapter, which is connected to the side of the fiber composite mounting plate opposite to the side beam via the second fastener, and the control circuit board is connected to the second adapter.

12. The battery device of claim 11, wherein, Along the height direction of the battery cell assembly, the second adapter includes a third piece and a fourth piece connected to the third piece, the third piece being connected to the fiber composite mounting plate by the second fastener; The battery device includes a mounting member, a gap is formed between the fourth sheet and the fiber composite mounting plate, at least a portion of the mounting member is located in the gap, and the control circuit board is connected to the fourth sheet through the mounting member.

13. The battery device according to claim 11 or 12, characterized in that, The second adapter has a second connection hole for connecting with the second fastener, the second connection hole extending along the height direction of the battery cell assembly to form a strip-shaped hole.

14. The battery device according to any one of claims 1-13, characterized in that, The fiber composite mounting plate includes a main body and a connecting portion connected to the end of the main body. The main body covers at least a portion of the terminal post of the battery cell. The connecting portion is located on the side of the side beam opposite to the battery cell and is fixedly connected to the side beam.

15. An electrical appliance, characterized in that, The electrical equipment includes the battery device according to any one of claims 1-14.

16. The powered device of claim 15, wherein, The electrical equipment includes aircraft.

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