Battery assembly, lower housing, and electrical components

Abstract

This application provides a battery device, a lower housing, and an electrical device. The battery device includes a lower housing. The lower housing includes a receiving space for accommodating individual battery cells, and includes a support member and an outer frame. The support member includes a fiber composite base plate, the receiving space is located above the fiber composite base plate, and the fiber composite base plate supports the individual battery cells. The outer frame is a non-metallic structural component, the fiber composite base plate is connected to the outer frame, the receiving space is located inside the outer frame, and the outer frame supports the support member.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery device, a lower housing, and an electrical device. Background Technology

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

[0003] This application provides a battery device, a lower housing, and an electrical device, which helps to balance the safety and energy density of the battery device.

[0004] This application provides a battery device including a lower housing. The lower housing includes a receiving space for accommodating individual battery cells, and includes a support member and an outer frame. The support member includes a fiber composite base plate, the receiving space is located above the fiber composite base plate, and the fiber composite base plate supports the individual battery cells. The outer frame is a non-metallic structural component, the fiber composite base plate is connected to the outer frame, the receiving space is located inside the outer frame, and the outer frame supports the support member.

[0005] The lower housing of this embodiment includes interconnected support members and an outer frame. The fiber composite base plate of the support member supports the individual battery cells. The outer frame is a non-metallic structural component. The outer frame supports the support member. The lower housing can be mounted to an electrical device via the outer frame. The fiber composite base plate itself has relatively high impact resistance, which helps improve the impact resistance of the bottom of the lower housing. The outer frame itself has good structural strength, providing protection for the individual battery cells. Simultaneously, the fiber composite base plate and the outer frame are relatively lightweight, facilitating a lightweight design for the lower housing. Therefore, the lower housing of this embodiment can balance bottom structural strength and overall lightweight design, which is beneficial for balancing the safety and energy density of the battery device.

[0006] In some feasible implementations, the outer frame includes a protective base plate, which includes bottom reinforcing ribs located below the fiber composite base plate and connected to the fiber composite base plate.

[0007] Bottom reinforcing ribs form a protective layer beneath the fiber composite base plate. When the lower casing is subjected to a bottom impact, the bottom reinforcing ribs and the fiber composite base plate work together to absorb impact energy and cushion the impact force. This stacked structure of the bottom reinforcing ribs and fiber composite base plate further enhances the bottom impact resistance of the lower casing, improving the safety of the battery pack.

[0008] In some feasible ways, the fiber composite base plate and the protective base plate are connected by injection molding, bonding, welding or riveting.

[0009] The fiber composite base plate and the protective base plate can be connected in a variety of ways, which helps to improve the connection flexibility between the fiber composite base plate and the protective base plate.

[0010] In some feasible implementations, the outer frame includes side walls and a mounting section, with the mounting section connected to the side walls, a fiber composite base plate located inside the side walls, and the mounting section located outside the side walls. The lower housing also includes a mounting sleeve disposed at the mounting section.

[0011] When battery cells are installed inside the lower enclosure, the side walls can provide circumferential protection for the battery cells. The mounting brackets and sleeves within the lower enclosure facilitate the installation and securing of the lower enclosure to electrical devices, reducing the difficulty of installation and improving installation efficiency.

[0012] In some feasible implementations, the outer frame also includes a boss, the top surface of the mounting part is a plane, the boss is provided on the top surface of the mounting part, the boss includes two opposing side surfaces, both side surfaces are inclined, and the distance between the two side surfaces increases along the direction close to the side wall.

[0013] The boss is designed to correspond to the mounting sleeve. The outer frame has a relatively large thickness in the boss area, which helps to improve the structural strength of the mounting position and increase the load-bearing capacity.

[0014] In some feasible implementations, the mounting portion includes a cylinder and a first reinforcing rib, with the mounting sleeve passing through the cylinder and the first reinforcing rib connecting the cylinder and the side wall.

[0015] The force borne by the mounting sleeve can be transferred and dispersed to other areas of the lower housing through the cylinder and the first reinforcing rib, thereby improving the impact resistance of the lower housing at the mounting position.

[0016] In some feasible implementations, the outer frame includes an electrical compartment located on one side of the fiber composite base plate.

[0017] Electrical compartments can be used to house high-voltage boxes or other components. The outer frame protects the components inside the electrical compartment, reducing the likelihood of damage from impacts.

[0018] In some feasible methods, the outer frame is a one-piece molded structure, which helps to improve the overall structural strength of the outer frame, the overall impact resistance of the lower box, and the structural reliability of the lower box.

[0019] In some feasible embodiments, the support also includes fiber composite side panels, a fiber composite bottom plate and fiber composite side panel connection, the fiber composite side panels being connected to the inside of the outer frame, and the fiber composite bottom plate and fiber composite side panels forming a receiving space.

[0020] When battery cells are housed within the lower enclosure, the fiber composite side panels provide circumferential protection for the battery cells. These side panels offer excellent resistance to impact deformation and enhance the lower enclosure's resistance to lateral extrusion. When the lower enclosure bears lateral impact forces, the outer frame and fiber composite side panels absorb the impact, buffering the force and reducing the likelihood of damage or malfunction to the battery cells within the lower enclosure. Furthermore, the relatively low weight of the fiber composite side panels contributes to a lightweight design for the lower enclosure.

[0021] In some feasible embodiments, the support also includes a fiber composite flange, the top of which is connected to the fiber composite side plate, and the fiber composite flange is connected to the outer frame.

[0022] During the connection process between the support component and the outer frame, the support component can be positioned by fiber composite flange, which helps to reduce the difficulty of connecting the support component and the outer frame.

[0023] In some feasible ways, the fiber composite base plate, fiber composite side plate and fiber composite flange are integrally formed, which helps to reduce the processing difficulty of the support and improve the overall structural strength of the support.

[0024] In some feasible ways, at least one of the fiber composite base plate, fiber composite side plate, and fiber composite flange is connected to the outer frame by injection molding, bonding, welding, or riveting.

[0025] The fiber composite base plate, fiber composite side plate, and fiber composite flange can be connected to the outer frame in various ways, which helps to improve the flexibility of the connection between the fiber composite base plate, fiber composite side plate, and fiber composite flange and the outer frame.

[0026] In some feasible embodiments, the outer frame includes an outer flange, a mounting portion, and a second reinforcing rib. The outer flange is located above the mounting portion and is spaced apart from the mounting portion. A fiber composite flange is located above the outer flange and connected to the outer flange. The second reinforcing rib connects the outer flange and the mounting portion.

[0027] The second reinforcing rib improves the connection strength between the outward-flared edge and the mounting section, enhancing the outer frame's resistance to lateral extrusion. When the lower casing bears lateral impact forces, the mounting section, the second reinforcing rib, and the outward-flared edge can absorb the lateral impact force, buffering the impact and reducing the likelihood of damage or failure of the battery cells within the lower casing. The structural design of the outward-flared edge, mounting section, and second reinforcing rib helps to balance the structural strength and lightweight design of the outer frame.

[0028] In some feasible implementations, the outer frame includes an electrical compartment located on one side of the containment space, and a fiber composite base plate and fiber composite side plates form a structure with side openings facing the electrical compartment.

[0029] Electrical compartments can be used to house high-voltage boxes or other components. The outer frame protects the components inside the electrical compartment, reducing the likelihood of damage from impacts.

[0030] In some feasible embodiments, the lower housing also includes a first limiting beam, with both ends of the first limiting beam connected to the outer frame. The first limiting beam is located outside the accommodating space, and the electrical compartment and the accommodating space are located on both sides of the first limiting beam.

[0031] During the charging and discharging process of the battery device, individual battery cells may expand or contract in volume. When a battery cell expands, it can compress the first limiting beam. The first limiting beam can absorb the expansion force, thereby reducing the possibility that the expansion force generated by the battery cell will directly act on the components inside the electrical compartment and cause damage to the components inside the electrical compartment.

[0032] In some feasible implementations, the lower box also includes a second limiting beam, which is disposed within the accommodating space and whose two ends are respectively connected to the outer frame.

[0033] Battery cell assemblies can be placed on both sides of the second limiting beam. During the charging and discharging process of the battery device, the battery cells may expand or contract in volume. When a battery cell expands, it can compress the second limiting beam, which can absorb the expansion force and reduce the possibility of damage to the lower casing caused by the expansion force generated by the battery cell.

[0034] In some feasible embodiments, the support also includes a metal plate, which is stacked on top of the fiber composite base plate and connected to the outer frame.

[0035] The structure formed by the stacking of fiber composite base plate and metal plate has good impact deformation resistance, which helps to improve the impact resistance of the bottom of the lower box.

[0036] In some feasible ways, at least one of the fiber composite base plate and the metal plate is connected to the outer frame by injection molding, which helps to improve the connection strength between the support and the outer frame.

[0037] This application provides a lower housing for a battery device. The lower housing includes a housing space for accommodating individual battery cells, a support member, and an outer frame. The support member includes a fiber composite base plate, the housing space is located above the fiber composite base plate, and the fiber composite base plate supports the individual battery cells. The outer frame is a non-metallic structural component, the fiber composite base plate is connected to the outer frame, the housing space is located inside the outer frame, and the outer frame supports the support member.

[0038] In some feasible implementations, the outer frame includes a protective base plate, which includes bottom reinforcing ribs located below the fiber composite base plate and connected to the fiber composite base plate.

[0039] In some feasible embodiments, the support also includes fiber composite side panels and fiber composite flanges, with the fiber composite base plate, fiber composite side panels, and fiber composite flanges being an integrally formed structure. The fiber composite side panels are connected to the inner side of the outer frame, the fiber composite base plate and fiber composite side panels form a receiving space, and the fiber composite flanges are connected to the outer frame.

[0040] This application provides an electrical device including the battery device described above. The battery device is used to provide electrical energy. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0044] Figure 3 This is a partially exploded structural diagram of a battery cell provided in an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of the lower housing provided in one embodiment of this application;

[0046] Figure 5 This is a schematic diagram of the lower housing provided in one embodiment of this application;

[0047] Figure 6 This is a schematic diagram of the lower housing provided in one embodiment of this application;

[0048] Figure 7 yes Figure 5 A schematic diagram of the cross-sectional structure along the MM direction;

[0049] Figure 8 yes Figure 4 Enlarged view of point P in the middle;

[0050] Figure 9 yes Figure 6 Enlarged diagram of point S in the middle;

[0051] Figure 10 This is a schematic diagram of the lower housing provided in one embodiment of this application;

[0052] Figure 11 yes Figure 5 A schematic diagram of the cross-sectional structure along the VV direction;

[0053] Figure 12 This is a schematic diagram of the structure of a support member provided in an embodiment of this application;

[0054] Figure 13 This is a cross-sectional structural diagram of the lower housing provided in an embodiment of this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Vehicle; 10. Battery unit; 11. Controller; 12. Motor;

[0057] 20. Battery cell modules;

[0058] 30. Battery cell;

[0059] 40. End cap; 41. Electrode terminal;

[0060] 50. Shell;

[0061] 60. Electrode assembly;

[0062] 70. Lower housing; 701. Accommodation space;

[0063] 80. Supporting components; 801. Side openings; 81. Fiber composite base plate; 82. Fiber composite side plate; 83. Fiber composite flange; 84. Metal plate;

[0064] 90. Outer frame; 901. Electrical compartment; 9011. Bottom opening; 91. Protective base plate; 911. Bottom reinforcing rib; 92. Side wall; 93. Mounting part; 931. Cylinder body; 932. First reinforcing rib; 933. Protrusion; 94. Boss; 941. Side surface; 95. Outward flange; 96. Second reinforcing rib;

[0065] 100. Mounting sleeve;

[0066] 110. Connector bracket;

[0067] 120. First limiting beam;

[0068] 130. Second limiting beam. Detailed Implementation

[0069] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0070] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0071] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0072] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0074] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0076] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0077] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include battery cell assemblies, etc. A battery device generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0078] In related technologies, the battery pack casing is made of metal, making the overall weight of the casing relatively heavy and affecting the overall energy density of the battery pack. If the casing thickness is reduced to decrease the overall weight, the structural strength of the bottom of the casing will be relatively compromised, reducing its impact resistance and affecting the safety of the battery pack.

[0079] To alleviate the above problems, the enclosure can be designed to be lightweight, while the impact resistance of the bottom of the enclosure can be improved.

[0080] Based on the above considerations, the inventors, after in-depth research, designed a battery device. In this battery device, the lower casing includes a support member and an outer frame. The support member includes a fiber composite base plate, which helps to improve the bottom rigidity of the lower casing and enhance its impact resistance. The fiber composite base plate and the outer frame are relatively lightweight, contributing to the lightweight design of the lower casing. Therefore, the lower casing can balance bottom structural strength with overall lightweight design.

[0081] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0082] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. 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. Spacecraft 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 above-mentioned electrical devices.

[0083] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including lower housings and electrical devices using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0084] See Figure 1 As shown, vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Vehicle 1 is equipped with a battery device 10. The battery device 10 can be located at the bottom of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to supply power to the motor 12. For example, this is for the power needs of vehicle 1 during starting, navigation, and driving.

[0085] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0086] To meet diverse power demands, the battery device 10 may include multiple battery cells. A battery cell is the smallest unit that makes up a battery cell assembly. Multiple battery cells can be connected in series and / or in parallel via electrode terminals for various applications. The battery device mentioned in this application includes a battery cell assembly. Multiple battery cells can be connected in series, in parallel, or in a mixed configuration. A mixed configuration refers to a combination of series and parallel connections.

[0087] In some embodiments, see Figure 2 As shown, there can be multiple battery cells 30. Multiple battery cells 30 are first connected in series, parallel, or in a mixed manner to form a battery cell assembly 20. Multiple battery cell assemblies 20 are then connected in series, parallel, or in a mixed manner to form a whole.

[0088] Multiple battery cells 30 in the battery cell assembly 20 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 30 in the battery cell assembly 20.

[0089] In this embodiment, the battery cell 30 may include a lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and this embodiment is not limited thereto. The battery cell 30 may be flat, cuboid, or other shapes, and this embodiment is not limited thereto either. However, for the sake of brevity, the following embodiment uses a cuboid battery cell 30 as an example for illustration.

[0090] See Figure 3 As shown, the battery cell 30 includes an end cap 40, a housing 50, and an electrode assembly 60.

[0091] End cap 40 refers to a component that covers the opening of housing 50 to isolate the internal environment of battery cell 30 from the external environment. Exemplarily, the shape of end cap 40 can be adapted to the shape of housing 50 to fit the housing 50. Exemplarily, end cap 40 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 40 is not easily deformed under pressure or impact, enabling battery cell 30 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 41 can be provided on end cap 40. Electrode terminals 41 can be used for electrical connection with electrode assembly 60 for outputting or inputting electrical energy into battery cell 30.

[0092] In some embodiments, the end cap 40 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold. The end cap 40 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating component may also be provided on the inner side of the end cap 40. The insulating component can be used to isolate the electrical connection components within the housing 50 from the end cap 40 to reduce the risk of short circuits. Exemplarily, the insulating component can be plastic, rubber, etc.

[0093] The housing 50 is a component used to cooperate with the end cap 40 to form the internal environment of the battery cell 30. The formed internal environment can accommodate the electrode assembly 60, electrolyte (not shown in the figure), and other components. The housing 50 and the end cap 40 can be independent components. An opening can be provided on the housing 50, and the end cap 40 closes the opening to form the internal environment of the battery cell 30. Alternatively, the end cap 40 and the housing 50 can be integrated. Specifically, the end cap 40 and the housing 50 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 50, the end cap 40 closes the housing 50. The housing 50 can be of various shapes and sizes, such as cuboid, hexagonal prism, etc. Specifically, the shape of the housing 50 can be determined according to the specific shape and size of the electrode assembly 60. The material of the housing 50 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment does not impose any special limitations on this.

[0094] See Figure 4 and Figure 5 As shown in the figure, this application embodiment provides a battery device 10, which includes a lower housing 70.

[0095] The lower housing 70 includes a receiving space 701 for accommodating the battery cell assembly 20. The lower housing 70 includes a support member 80 and an outer frame 90. The support member 80 includes a fiber composite base plate 81. The receiving space 701 is located above the fiber composite base plate 81. The fiber composite base plate 81 supports the battery cell assembly 20. The outer frame 90 is a non-metallic structural component. The fiber composite base plate 81 is connected to the outer frame 90. The receiving space 701 is located inside the outer frame 90. The outer frame 90 supports the support member 80.

[0096] In this embodiment, the battery cell assembly 20 can be placed within the receiving space 701 of the lower housing 70. The battery cell assembly 20 is located above the fiber composite base plate 81. The fiber composite base plate 81 supports the battery cell assembly 20. The outer frame 90 can provide protection for the battery cell assembly 20 from its periphery. The lower housing 70 can be located at the bottom of the vehicle 1. The lower housing 70 can be connected to the vehicle 1 via the outer frame 90. The outer frame 90 supports the support member 80. The force exerted on the support member 80 can be transmitted to the vehicle 1 via the outer frame 90.

[0097] In some feasible embodiments, the fiber composite base plate 81 can be manufactured using an injection molding process. In some examples, the material of the fiber composite base plate 81 can be, but is not limited to, glass fiber resin composite material or carbon fiber resin composite material. For example, the fiber composite base plate 81 can be manufactured using glass fiber resin composite material or carbon fiber resin composite material.

[0098] In some feasible ways, the outer frame 90 can be manufactured using an injection molding process. In some examples, the material of the outer frame 90 may include, but is not limited to, plastics. The material of the outer frame 90 may not include high-strength fibers.

[0099] In some feasible ways, the fiber composite base plate 81 and the outer frame 90 are manufactured separately, and then the fiber composite base plate 81 and the outer frame 90 are connected to form an integral structure.

[0100] The fiber composite base plate 81 has good impact resistance. For example, during a bottom ball impact test on the lower housing 70, the fiber composite base plate 81 can absorb the impact energy of the test ball, buffer the impact force, and reduce the possibility of damage or failure of the battery cell assembly 20 inside the lower housing 70 due to impact. At the same time, the fiber composite base plate 81 and the outer frame 90 are relatively lightweight, which is beneficial for achieving a lightweight design of the lower housing 70.

[0101] In some possible implementations, the battery assembly 10 also includes an upper housing or cover. The upper housing or cover can close onto the lower housing 70. The upper housing or cover can close the receiving space 701 of the lower housing 70.

[0102] In some feasible ways, the lower box 70 can be of various shapes, such as a cylinder, a cuboid, etc.

[0103] In some feasible ways, to improve the sealing performance after the upper housing or cover plate is connected to the lower housing 70, a sealing element, such as sealant or sealing ring, can also be provided between the upper housing or cover plate and the lower housing 70.

[0104] The lower housing 70 of this embodiment includes a support member 80 and an outer frame 90 connected to each other. The fiber composite base plate 81 of the support member 80 supports the battery cell assembly 20. The outer frame 90 is a non-metallic structural component. The outer frame 90 supports the support member 80. The lower housing 70 can be mounted to an electrical device, such as the bottom of a vehicle 1, via the outer frame 90. The fiber composite base plate 81 itself has relatively high impact resistance, which helps improve the impact resistance of the bottom of the lower housing 70. The outer frame 90 itself has good structural strength, which can provide protection for the battery cell assembly 20. At the same time, the fiber composite base plate 81 and the outer frame 90 are relatively lightweight, which is beneficial for achieving a lightweight design of the lower housing 70. Therefore, the lower housing 70 of this embodiment can balance bottom structural strength and overall lightweight design, which is beneficial for balancing the safety and energy density of the battery device 10.

[0105] See also some of the possible implementation methods. Figure 6 and Figure 7 As shown, the outer frame 90 includes a protective base plate 91. The protective base plate 91 is a non-metallic structural component. The protective base plate 91 includes a bottom reinforcing rib 911. The bottom reinforcing rib 911 is located below the fiber composite base plate 81. The bottom reinforcing rib 911 is connected to the fiber composite base plate 81.

[0106] The outer frame 90 forms a space to accommodate the support member 80. The space accommodating the support member 80 is located above the protective base plate 91. The protective base plate 91 can support the support member 80. The outer frame 90 provides protection for the support member 80 from its periphery.

[0107] The bottom reinforcing rib 911 forms a protective layer beneath the fiber composite base plate 81. When the lower housing 70 is subjected to a bottom impact, the bottom reinforcing rib 911 and the fiber composite base plate 81 work together to absorb impact energy and cushion the impact force. The stacked structure design of the bottom reinforcing rib 911 and the fiber composite base plate 81 further enhances the bottom impact resistance of the lower housing 70 and improves the safety of the battery device 10.

[0108] In some examples, multiple bottom reinforcing ribs 911 are arranged in a crisscross pattern. The multiple bottom reinforcing ribs 911 enclose a perforated hole. The bottom surface of the fiber composite base plate 81 can be observed through the perforated hole.

[0109] In some feasible ways, the fiber composite base plate 81 and the protective base plate 91 are connected by injection molding, bonding, welding or riveting.

[0110] The fiber composite base plate 81 and the protective base plate 91 can be connected in a variety of ways, which helps to improve the connection flexibility between the fiber composite base plate 81 and the protective base plate 91.

[0111] In some examples, the fiber composite base plate 81 and the protective base plate 91 can be injection molded. The fiber composite base plate 81 is placed in a corresponding mold, and non-metallic material is injected into the mold to form the outer frame 90. The connection between the fiber composite base plate 81 and the protective base plate 91 is achieved by injection molding fusion bonding.

[0112] In some examples, the material of the protective base plate 91 may include plastic. The material of the protective base plate 91 may not include high-strength fibers.

[0113] In some examples, the fiber composite base plate 81 and the protective base plate 91 can be bonded together with an adhesive.

[0114] In some examples, the fiber composite base plate 81 and the protective base plate 91 can be connected by hot plate welding or ultrasonic welding.

[0115] In some examples, the fiber composite base plate 81 and the protective base plate 91 can be connected by rivets.

[0116] See also some of the possible implementation methods. Figure 7 As shown, the outer frame 90 includes a side wall 92 and a mounting portion 93. The mounting portion 93 is connected to the side wall 92. The fiber composite base plate 81 is located inside the side wall 92, and the mounting portion 93 is located outside the side wall 92. The lower housing 70 also includes a mounting sleeve 100. The mounting sleeve 100 is disposed on the mounting portion 93.

[0117] When the battery cell assembly 20 is installed inside the lower housing 70, the side wall 92 can provide circumferential protection for the battery cell assembly 20. When the lower housing 70 needs to be installed on an electrical device, fasteners such as screws can be used to pass through the mounting sleeve 100 to connect the lower housing 70 and the electrical device via fasteners.

[0118] The mounting part 93 and mounting sleeve 100 provided in the lower enclosure 70 can facilitate the installation and fixing of the lower enclosure 70 on the electrical device, reduce the difficulty of the installation operation of the lower enclosure 70, and help improve the installation efficiency of the lower enclosure 70.

[0119] In some examples, the outer frame 90 includes four side walls 92. Two opposite side walls 92 are respectively provided with mounting parts 93.

[0120] In some examples, the mounting sleeve 100 is a metal structural component, giving it relatively high structural strength. For example, the material of the mounting sleeve 100 may include, but is not limited to, steel, aluminum, or aluminum alloy.

[0121] In some examples, the mounting sleeve 100 and the outer frame 90 are injection molded. The mounting sleeve 100 is embedded in the mounting portion 93, improving the connection strength between the mounting sleeve 100 and the mounting portion 93, and enhancing the impact resistance of the connection point between the mounting sleeve 100 and the mounting portion 93. Exemplarily, the mounting sleeve 100 is placed in a corresponding mold, and then non-metallic material is injected into the mold to form the outer frame 90, with the outer frame 90 and the mounting sleeve 100 forming an integral structure.

[0122] In some examples, the outer frame 90 includes a protective base plate 91. The protective base plate 91 is connected to the side wall 92. Exemplarily, the protective base plate 91, the side wall 92, and the mounting portion 93 are integrally injection molded.

[0123] See in some examples Figure 8 As shown, the outer frame 90 also includes a boss 94. The top surface of the mounting portion 93 is flat. The boss 94 is provided on the top surface of the mounting portion 93. The boss 94 includes two opposing side surfaces 941. Both side surfaces 941 are inclined surfaces. The distance between the two side surfaces 941 increases along the direction close to the sidewall 92.

[0124] The boss 94 is positioned to correspond to the mounting sleeve 100. The outer frame 90 has a relatively large thickness in the area of ​​the boss 94, which helps to improve the structural strength of the mounting position and increase the mounting capacity.

[0125] Both side surfaces 941 are beveled, giving them a good draft angle. The boss 94 assists in mold opening. After the mounting sleeve 100 and outer frame 90 are injection molded, the mold can be opened relatively easily in a direction perpendicular to the axial direction of the mounting sleeve 100, improving demolding efficiency.

[0126] For example, the two opposing side surfaces 941 are tangent to the outer surface of the mounting sleeve 100.

[0127] For example, the distance between the two side surfaces 941 gradually increases along the direction close to the sidewall 92.

[0128] For example, the top surface of the mounting sleeve 100 is flush with the top surface of the boss 94.

[0129] For example, the boss 94 is connected to the sidewall 92.

[0130] See in some examples Figure 9 As shown, the mounting part 93 includes a cylindrical body 931 and a first reinforcing rib 932. The mounting sleeve 100 passes through the cylindrical body 931. The first reinforcing rib 932 connects the cylindrical body 931 and the side wall 92.

[0131] The force borne by the mounting sleeve 100 can be transmitted and dispersed to other areas of the lower housing 70 through the cylinder 931 and the first reinforcing rib 932, thereby improving the impact resistance of the lower housing 70 at the mounting position.

[0132] For example, a plurality of first reinforcing ribs 932 are arranged intersecting each other. A groove is formed between the plurality of first reinforcing ribs 932. The groove has an opening facing away from the top surface of the mounting portion 93.

[0133] See in some examples Figure 8 and Figure 9 As shown, the mounting portion 93 includes a protrusion 933. The protrusion 933 protrudes in a direction away from the side wall 92. The protrusion 933 is provided corresponding to the mounting sleeve 100. A portion of the mounting sleeve 100 is located on the protrusion 933, and a portion of the cylinder body 931 is located on the protrusion 933. A first reinforcing rib 932 is provided on the protrusion 933.

[0134] See also some of the possible implementation methods. Figure 10 As shown, the outer frame 90 includes an electrical compartment 901. The electrical compartment 901 is located on one side of the fiber composite base plate 81. A support member 80 is located on the outside of the electrical compartment 901 and does not extend into the electrical compartment 901. The electrical compartment 901 and the support member 80 may be spaced apart.

[0135] The electrical compartment 901 can be used to house high-voltage boxes or other components. The outer frame 90 can protect the components housed within the electrical compartment 901, reducing the possibility of damage from impacts.

[0136] See in some examples Figure 6 As shown, the electrical compartment 901 has a lower opening 9011 located at the bottom of the lower housing 70. The fiber composite base plate 81 of the support member 80 avoids the lower opening 9011. When it is necessary to inspect and repair the components inside the electrical compartment 901, the inspection and repair operation can be performed through the lower opening 9011 of the electrical compartment 901 without removing the lower housing 70, which helps to reduce the difficulty of inspecting and repairing the components inside the electrical compartment 901. For example, a cover plate is used to cover the lower opening 9011 of the electrical compartment 901 to reduce the possibility of external objects entering the electrical compartment 901 through the lower opening 9011. The cover plate is detachably connected to the outer frame 90.

[0137] See in some examples Figure 10As shown, the lower housing 70 includes a connector bracket 110. The outer frame 90 includes a sidewall 92. The connector bracket 110 is embedded in the sidewall 92. The connector bracket 110 includes a through hole communicating with the electrical compartment 901. Exemplarily, the connector bracket 110 and the outer frame 90 can be injection molded together as a single structure. The connector bracket 110 is used to mount and fix a connector. For example, devices such as a high-voltage box within the electrical compartment 901 can be connected to the connector.

[0138] In some feasible ways, the outer frame 90 is a one-piece molded structure, which is beneficial to improve the overall structural strength of the outer frame 90, improve the overall impact resistance of the lower box 70, and improve the structural reliability of the lower box 70.

[0139] In some examples, the outer frame 90 is manufactured as a single piece using an injection molding process.

[0140] See also some of the possible implementation methods. Figure 11 and Figure 12 As shown, the support member 80 also includes a fiber composite side plate 82. The fiber composite base plate 81 and the fiber composite side plate 82 are connected. The fiber composite side plate 82 is connected to the inner side of the outer frame 90. The fiber composite base plate 81 and the fiber composite side plate 82 form a receiving space 701.

[0141] When the battery cell assembly 20 is installed inside the lower housing 70, the fiber composite side panel 82 can provide circumferential protection for the battery cell assembly 20. The fiber composite side panel 82 has good resistance to impact deformation. The fiber composite side panel 82 can improve the lateral extrusion resistance of the lower housing 70. When the lower housing 70 bears lateral impact forces, the outer frame 90 and the fiber composite side panel 82 can absorb the lateral impact force, buffer the impact force, and reduce the possibility of damage or failure of the battery cell assembly 20 inside the lower housing 70 due to impact. At the same time, the fiber composite side panel 82 itself is relatively lightweight, which is beneficial for achieving a lightweight design of the lower housing 70.

[0142] In some examples, the fiber composite side panel 82 can be manufactured using an injection molding process. In some examples, the material of the fiber composite side panel 82 can be, but is not limited to, glass fiber resin composite material or carbon fiber resin composite material. For example, the fiber composite side panel 82 can be manufactured using glass fiber resin composite material or carbon fiber resin composite material.

[0143] In some examples, the fiber composite base plate 81, fiber composite side plate 82 and outer frame 90 are manufactured separately, and then the fiber composite base plate 81, fiber composite side plate 82 and outer frame 90 are connected to form an integral structure.

[0144] In some examples, the fiber composite base plate 81 and the fiber composite side plate 82 are integrally molded structures. Exemplarily, the fiber composite base plate 81 and the fiber composite side plate 82 are made of the same material. The fiber composite base plate 81 and the fiber composite side plate 82 are integrally molded using an injection molding process.

[0145] In some examples, the fiber composite base plate 81 and the fiber composite side plate 82 are integrally molded structures. The fiber composite base plate 81, the fiber composite side plate 82, and the outer frame 90 are integrally molded by injection molding.

[0146] See in some examples Figure 11 and Figure 12 As shown, the support member 80 also includes a fiber composite flange 83. The top end of the fiber composite side plate 82 is connected to the fiber composite flange 83. The fiber composite flange 83 is connected to the outer frame 90.

[0147] During the connection process between the support member 80 and the outer frame 90, the support member 80 can be positioned by the fiber composite flange 83, which helps to reduce the connection difficulty between the support member 80 and the outer frame 90.

[0148] In some examples, the fiber composite flange 83 can be manufactured using injection molding. In some examples, the material of the fiber composite flange 83 can be, but is not limited to, glass fiber resin composite material or carbon fiber resin composite material. For example, the fiber composite flange 83 can be manufactured using glass fiber resin composite material or carbon fiber resin composite material.

[0149] In some examples, the fiber composite base plate 81, fiber composite side plate 82, fiber composite flange 83 and outer frame 90 are manufactured separately, and then the fiber composite base plate 81, fiber composite side plate 82, fiber composite flange 83 and outer frame 90 are connected to form an integral structure.

[0150] In some examples, the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 are integrally formed, which helps to reduce the processing difficulty of the support 80 and improve the overall structural strength of the support 80.

[0151] For example, the fiber composite base plate 81, the fiber composite side plate 82, and the fiber composite flange 83 are made of the same material. The fiber composite base plate 81, the fiber composite side plate 82, and the fiber composite flange 83 are integrally molded using an injection molding process.

[0152] In some examples, at least one of the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 is connected to the outer frame 90 by injection molding, bonding, welding, or riveting.

[0153] The fiber composite base plate 81, fiber composite side plate 82 and fiber composite flange 83 can be connected to the outer frame 90 in various ways, which helps to improve the connection flexibility between the fiber composite base plate 81, fiber composite side plate 82 and fiber composite flange 83 and the outer frame 90.

[0154] In some examples, the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 are each injection molded with the outer frame 90.

[0155] In some examples, the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 are integrally molded structures. The outer frame 90 itself is an integrally molded structure. The support member 80 is placed in a corresponding mold, and then non-metallic material is injected into the mold to form the outer frame 90, resulting in an integral structure in which the support member 80 and the outer frame 90 are interconnected. The support member 80 and the outer frame 90 are connected by fusion bonding.

[0156] In some examples, at least one of the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 is bonded to the outer frame 90 by an adhesive.

[0157] In some examples, at least one of the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 is connected to the outer frame 90 by hot plate welding or ultrasonic welding.

[0158] In some examples, at least one of the fiber composite base plate 81, fiber composite side plate 82, and fiber composite flange 83 is connected to the outer frame 90 by rivets.

[0159] See in some examples Figure 7 and Figure 8 As shown, the outer frame 90 includes an outer flange 95, a mounting portion 93, and a second reinforcing rib 96. The outer flange 95 is located above the mounting portion 93. The outer flange 95 and the mounting portion 93 are spaced apart. A fiber composite flange 83 is located above the outer flange 95 and connected to the outer flange 95. The second reinforcing rib 96 connects the outer flange 95 and the mounting portion 93.

[0160] The second reinforcing rib 96 can improve the connection strength between the outer flange 95 and the mounting part 93, and improve the resistance of the outer frame 90 to lateral extrusion. When the lower housing 70 bears lateral impact force, the mounting part 93, the second reinforcing rib 96, and the outer flange 95 can absorb the lateral impact force, buffer the impact force, and reduce the possibility of damage or failure of the battery cell assembly 20 inside the lower housing 70 due to impact. The structural design of the outer flange 95, the mounting part 93, and the second reinforcing rib 96 is conducive to balancing the structural strength and lightweight of the outer frame 90.

[0161] In some examples, the outer frame 90 includes a sidewall 92. A second stiffener 96 is connected to the sidewall 92.

[0162] See in some examples Figure 10 and Figure 12 As shown, the outer frame 90 includes an electrical compartment 901. The electrical compartment 901 is located on one side of the accommodating space 701. A fiber composite base plate 81 and a fiber composite side plate 82 form a structure with a side opening 801. The side opening 801 faces the electrical compartment 901.

[0163] The electrical compartment 901 can be used to house high-voltage boxes or other components. The outer frame 90 can protect the components housed within the electrical compartment 901, reducing the possibility of damage from impacts.

[0164] For example, there are three fiber composite side panels 82. The fiber composite base plate 81 has a rectangular structure. The three fiber composite side panels 82 are respectively connected to the three edges of the fiber composite base plate 81. The fiber composite base plate 81 near the edge of the electrical compartment 901 is not provided with fiber composite side panels 82, so as to form a side opening 801.

[0165] See in some examples Figure 10 As shown, the lower housing 70 also includes a first limiting beam 120. The two ends of the first limiting beam 120 are connected to the outer frame 90. The first limiting beam 120 is located outside the accommodating space 701. The electrical compartment 901 and the accommodating space 701 are located on either side of the first limiting beam 120.

[0166] During the charging and discharging process of the battery device 10, the battery cell 30 may expand or contract in volume. When the battery cell 30 expands, it may compress the first limiting beam 120. The first limiting beam 120 can absorb the expansion force, thereby reducing the possibility that the expansion force generated by the battery cell 30 may directly act on the components inside the electrical compartment 901 and cause damage to the components inside the electrical compartment 901.

[0167] In some examples, the first limiting beam 120 is a non-metallic structural component, which helps to reduce the weight of the first limiting beam 120 itself. Exemplarily, the material of the first limiting beam 120 may include, but is not limited to, plastic.

[0168] In some examples, the first limiting beam 120 is detachably connected to the outer frame 90. Exemplarily, the first limiting beam 120 and the outer frame 90 are detachably connected by fasteners such as screws.

[0169] In some examples, the first limiting beam 120 and the outer frame 90 are integrally formed. Exemplarily, the first limiting beam 120 and the outer frame 90 are integrally formed using an injection molding process. The material of the first limiting beam 120 is the same as the material of the outer frame 90. Non-metallic material is injected into a corresponding mold to simultaneously form the first limiting beam 120 and the outer frame 90.

[0170] See in some examples Figure 10 As shown, the lower housing 70 also includes a second limiting beam 130. The second limiting beam 130 is disposed within the accommodating space 701. Both ends of the second limiting beam 130 are respectively connected to the outer frame 90.

[0171] Battery cell assemblies 20 can be placed on both sides of the second limiting beam 130. During the charging and discharging process of the battery device 10, the battery cells 30 may expand or contract in volume. When a battery cell 30 expands, it can compress the second limiting beam 130. The second limiting beam 130 can absorb the expansion force, thereby reducing the possibility that the expansion force generated by the battery cell 30 will act on the lower housing 70 and cause damage to the lower housing 70.

[0172] In some examples, the lower housing 70 also includes a first limiting beam 120. The first limiting beam 120 and a second limiting beam 130 are spaced apart. The second limiting beam 130 is located on the side of the first limiting beam 120 facing away from the electrical compartment 901.

[0173] In some examples, the second limiting beam 130 is detachably connected to the outer frame 90. Exemplarily, the first limiting beam 120 and the outer frame 90 are detachably connected by fasteners such as screws.

[0174] In some examples, the outer frame 90 includes a sidewall 92. The support member 80 includes a fiber composite sideplate 82. The fiber composite sideplate 82 is connected to the sidewall 92. Fasteners pass through the sidewall 92 and the fiber composite sideplate 82 and are connected to the second limiting beam 130.

[0175] In some examples, the second limiting beam 130 is a non-metallic structural component, which helps to reduce the weight of the second limiting beam 130 itself. Exemplarily, the material of the second limiting beam 130 may include, but is not limited to, plastic.

[0176] In some possible implementations, the outer frame 90 has a bottom opening. A fiber composite base plate 81 covers at least part of the bottom opening. Above the fiber composite base plate 81 is a receiving space 701.

[0177] In some examples, the fiber composite base plate 81 and the outer frame 90 are injection molded.

[0178] See also some of the possible implementation methods. Figure 13As shown, the support member 80 also includes a metal plate 84. The metal plate 84 is stacked on top of the fiber composite base plate 81. The metal plate 84 is located above the fiber composite base plate 81. The metal plate 84 is connected to the outer frame 90.

[0179] The outer frame 90 has a bottom opening. A fiber composite base plate 81 and a metal plate 84 cover at least part of the bottom opening. Above the metal plate 84 is a receiving space 701.

[0180] The structure formed by the layering of fiber composite base plate 81 and metal plate 84 has good impact deformation resistance, which helps to improve the impact resistance of the bottom of the lower housing 70. For example, when the lower housing 70 is subjected to a bottom ball impact test, the fiber composite base plate 81 and metal plate 84 can absorb the impact energy of the test ball, buffer the impact force, and reduce the possibility of damage or failure of the battery cell assembly 20 inside the lower housing 70 due to impact.

[0181] In some examples, the material of the metal plate 84 includes, but is not limited to, steel, aluminum, or aluminum alloys.

[0182] In some examples, the fiber composite base plate 81 is bonded to the metal plate 84.

[0183] In some examples, at least one of the fiber composite base plate 81 and the metal plate 84 is connected to the outer frame 90 by injection molding, which helps to improve the connection strength between the support 80 and the outer frame 90.

[0184] In some examples, the fiber composite base plate 81 and the outer frame 90 are injection molded to improve the connection strength between them. Similarly, the metal plate 84 is injection molded to the outer frame 90 to improve the connection strength between them. The stacked fiber composite plate and metal plate 84 are placed into corresponding molds, and non-metallic material is injected into the molds to form the outer frame 90, resulting in an integrated structure where the fiber composite base plate 81, metal plate 84, and outer frame 90 are interconnected.

[0185] This application provides a lower housing 70 for a battery device 10. The lower housing 70 includes a housing space 701 for accommodating a battery cell assembly 20, a support member 80, and an outer frame 90. The support member 80 includes a fiber composite base plate 81. The housing space 701 is located above the fiber composite base plate 81, which supports the battery cell assembly 20. The outer frame 90 is a non-metallic structural component. The fiber composite base plate 81 is connected to the outer frame 90. The housing space 701 is located inside the outer frame 90, which supports the support member 80.

[0186] In some possible implementations, the outer frame 90 includes a protective base plate 91, which includes a bottom reinforcing rib 911 located below the fiber composite base plate 81 and connected to the fiber composite base plate 81.

[0187] In some feasible embodiments, the support member 80 also includes a fiber composite side plate 82 and a fiber composite flange 83. The fiber composite base plate 81, the fiber composite side plate 82 and the fiber composite flange 83 are integrally formed structures. The fiber composite side plate 82 is connected to the inner side of the outer frame 90. The fiber composite base plate 81 and the fiber composite side plate 82 form a receiving space 701. The fiber composite flange 83 is connected to the outer frame 90.

[0188] In some possible implementations, the outer frame 90 includes sidewalls 92 and mounting portions 93. The sidewalls 92 are connected to the protective base plate 91. The mounting portions 93 are connected to the sidewalls 92. The sidewalls 92 are connected to fiber composite side panels 82.

[0189] In some feasible methods, the support component 80 is integrally formed using an injection molding process. The support component 80 is placed entirely into a corresponding mold, and non-metallic material is injected into the mold to integrally form the outer frame 90, resulting in an integrated structure where the support component 80 and the outer frame 90 are interconnected. The support component 80 and the outer frame 90 are connected by a fusion bonding process.

[0190] According to some embodiments of this application, this application also provides an electrical device including a battery device 10 of any of the above-described embodiments, and the battery device 10 is used to provide electrical energy to the electrical device. The electrical device can be any of the aforementioned devices or systems that utilize the battery device 10.

[0191] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The lower housing includes a receiving space for accommodating individual battery cell assemblies, and the lower housing includes a support member and an outer frame; The support includes a fiber composite base plate, the accommodating space is located above the fiber composite base plate, the fiber composite base plate is used to support the battery cell assembly, the outer frame is a non-metallic structural component, the fiber composite base plate is connected to the outer frame, the accommodating space is located inside the outer frame, and the outer frame is used to support the support.

2. The battery device according to claim 1, characterized in that, The outer frame includes a protective base plate, the protective base plate includes a bottom reinforcing rib, the bottom reinforcing rib is located below the fiber composite base plate, and the bottom reinforcing rib is connected to the fiber composite base plate.

3. The battery device according to claim 2, characterized in that, The fiber composite base plate and the protective base plate are connected by injection molding, bonding, welding or riveting.

4. The battery device according to any one of claims 1 to 3, characterized in that, The outer frame includes a side wall and a mounting part. The mounting part is connected to the side wall. The fiber composite base plate is located inside the side wall, and the mounting part is located outside the side wall. The lower box also includes a mounting sleeve, which is disposed on the mounting part.

5. The battery device according to claim 4, characterized in that, The outer frame also includes a boss. The top surface of the mounting part is a plane. The boss is provided on the top surface of the mounting part. The boss includes two opposing side surfaces. Both side surfaces are inclined surfaces. The distance between the two side surfaces increases along the direction close to the side wall.

6. The battery device according to claim 4 or 5, characterized in that, The mounting part includes a cylindrical body and a first reinforcing rib. The mounting sleeve passes through the cylindrical body, and the first reinforcing rib connects the cylindrical body and the side wall.

7. The battery device according to claim 1, characterized in that, The outer frame includes an electrical compartment located on one side of the fiber composite base plate.

8. The battery device according to claim 1, characterized in that, The outer frame is a one-piece molded structure.

9. The battery device according to any one of claims 1 to 8, characterized in that, The support also includes a fiber composite side plate, the fiber composite bottom plate and the fiber composite side plate are connected, the fiber composite side plate is connected to the inner side of the outer frame, and the fiber composite bottom plate and the fiber composite side plate form the receiving space.

10. The battery device according to claim 9, characterized in that, The support also includes a fiber composite flange, the top of which is connected to the fiber composite side plate, and the fiber composite flange is connected to the outer frame.

11. The battery device according to claim 10, characterized in that, The fiber composite base plate, the fiber composite side plate, and the fiber composite flange are integrally formed.

12. The battery device according to claim 10, characterized in that, At least one of the fiber composite base plate, the fiber composite side plate, and the fiber composite flange is connected to the outer frame by injection molding, bonding, welding, or riveting.

13. The battery device according to any one of claims 10 to 12, characterized in that, The outer frame includes an outer flange, a mounting portion, and a second reinforcing rib. The outer flange is located above the mounting portion and is spaced apart from the mounting portion. The fiber composite flange is located above the outer flange and is connected to the outer flange. The second reinforcing rib connects the outer flange and the mounting portion.

14. The battery device according to claim 9, characterized in that, The outer frame includes an electrical compartment located on one side of the accommodating space. The fiber composite base plate and the fiber composite side plate form a structure with a side opening facing the electrical compartment.

15. The battery device according to claim 14, characterized in that, The lower housing also includes a first limiting beam, with both ends of the first limiting beam connected to the outer frame. The first limiting beam is located outside the accommodating space, and the electrical compartment and the accommodating space are located on both sides of the first limiting beam.

16. The battery device according to claim 14, characterized in that, The lower housing also includes a second limiting beam, which is disposed within the accommodating space, and its two ends are respectively connected to the outer frame.

17. The battery device according to any one of claims 1 to 8, characterized in that, The support also includes a metal plate, which is stacked on top of the fiber composite base plate. The metal plate is located above the fiber composite base plate and is connected to the outer frame.

18. The battery device according to claim 17, characterized in that, At least one of the fiber composite base plate and the metal plate is connected to the outer frame by injection molding.

19. A lower housing for a battery device, characterized in that, The lower housing includes a housing space for accommodating battery cell components, a support member, and an outer frame. The support member includes a fiber composite base plate. The housing space is located above the fiber composite base plate, which supports the battery cell components. The outer frame is a non-metallic structural component. The fiber composite base plate is connected to the outer frame. The housing space is located inside the outer frame, which supports the support member.

20. The lower housing according to claim 19, characterized in that, The outer frame includes a protective base plate, the protective base plate includes a bottom reinforcing rib, the bottom reinforcing rib is located below the fiber composite base plate, and the bottom reinforcing rib is connected to the fiber composite base plate.

21. The lower housing according to claim 19, characterized in that, The support also includes a fiber composite side plate and a fiber composite flange. The fiber composite bottom plate, the fiber composite side plate and the fiber composite flange are integrally formed. The fiber composite side plate is connected to the inner side of the outer frame. The fiber composite bottom plate and the fiber composite side plate form the receiving space. The fiber composite flange is connected to the outer frame.

22. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1 to 18, the battery device being used to provide electrical energy.

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