Battery apparatus and electric apparatus

Abstract

The present application provides a battery apparatus and an electric apparatus. The battery apparatus comprises a case, battery cells, and a protective plate. The battery cells are arranged in the case. In the direction of gravity, the protective plate is arranged at the bottoms of the battery cells. The protective plate comprises a first fiber resin layer, a reinforcement layer, a second fiber resin layer, and a strengthening layer. The protective plate comprises a first region. In the first region, the first fiber resin layer, the reinforcement layer, and the second fiber resin layer are sequentially stacked. The first fiber resin layer is located on the side of the reinforcement layer facing the battery cells. The protective plate further comprises a second region. In the second region, the first fiber resin layer, the second fiber resin layer, and the strengthening layer are sequentially stacked; or the strengthening layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked; or the first fiber resin layer, the strengthening layer, and the second fiber resin layer are sequentially stacked. The battery apparatus has high reliability.

Description

Battery devices and electrical appliances Cross-references to related applications

[0001] This application claims priority to PCT patent application PCT / CN2024 / 128582 entitled “Battery Device and Power Consumption Device”, filed on October 30, 2024, and PCT / CN2024 / 129179 entitled “Battery Device and Power Consumption Device”, filed on October 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology

[0003] 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.

[0004] Improving the reliability of battery devices is a pressing issue in battery technology. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0006] In a first aspect, this application provides a battery device, which includes a housing, a battery cell, and a protective plate. The battery cell is disposed within the housing. Along the direction of gravity, the protective plate is disposed at the bottom of the battery cell. The protective plate includes a first fiber resin layer, a reinforcing layer, a second fiber resin layer, and a supplementary layer. The protective plate includes a first region in which the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are sequentially stacked. The first fiber resin layer is located on the side of the reinforcing layer facing the battery cell. The protective plate also includes a second region in which the first fiber resin layer, the second fiber resin layer, and the supplementary layer are sequentially stacked; or, the supplementary layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked; or, the first fiber resin layer, the supplementary layer, and the second fiber resin layer are sequentially stacked.

[0007] In the above scheme, since both the first and second regions include a first fiber resin layer and a second fiber resin layer, the risk of corrosion of the reinforcing layer and the strengthening layer can be reduced, thereby improving the reliability of the battery device. Furthermore, within the second region, the first fiber resin layer, the second fiber resin layer, and the strengthening layer are stacked sequentially; or, the strengthening layer, the first fiber resin layer, and the second fiber resin layer are stacked sequentially; or, the first fiber resin layer, the strengthening layer, and the second fiber resin layer are stacked sequentially. The strengthening layer can improve the strength and rigidity of the second region of the protective plate, thereby improving the ability of the second region of the protective plate to resist external impacts, which also helps to improve the reliability of the battery device.

[0008] In one or more embodiments of the first aspect, in the second region, a first fiber resin layer, a second fiber resin layer, and a reinforcing layer are sequentially stacked, and the surface of the reinforcing layer away from the second fiber resin layer is at least partially flush with the surface of the second fiber resin layer away from the reinforcing layer in the first region.

[0009] The above solution helps improve the flatness of the protective plate and reduces the risk of stress concentration leading to a decrease in the structural strength of the protective plate when external forces are applied to it.

[0010] In one or more embodiments of the first aspect, the first fiber resin layer has a flat plate structure.

[0011] In the above scheme, since the first fiber resin layer is a flat plate structure, the first fiber resin layer can evenly distribute the impact load, which helps to reduce the risk of excessive deformation of some battery cells inside the box.

[0012] In one or more embodiments of the first aspect, in the second region, a reinforcing layer, a first fiber resin layer, and a second fiber resin layer are sequentially stacked, and the surface of the reinforcing layer away from the first fiber resin layer is at least partially flush with the surface of the first fiber resin layer away from the reinforcing layer in the first region.

[0013] The above solution helps to improve the flatness of the protective plate. When external force is applied to the protective plate and transmitted to the first fiber resin layer and the box, it helps to reduce the risk of stress concentration between the first fiber resin layer and the box, which leads to a decrease in the connection strength between the protective plate and the box.

[0014] In one or more embodiments of the first aspect, the second fiber resin layer has a flat plate structure.

[0015] In the above scheme, since the second fiber resin layer is a flat plate structure, the second fiber resin layer can evenly distribute the impact load. When the external force is applied to the protective plate by the second fiber resin layer, the risk of excessive deformation of the second fiber resin layer is reduced, which helps to reduce the risk of excessive deformation of some battery cells inside the box.

[0016] In one or more embodiments of the first aspect, the second region is disposed around the first region.

[0017] In the above scheme, because the second region surrounds the first region, the overall strength distribution of the protective plate is relatively uniform, and the structural stability is strong. Furthermore, in embodiments where the protective plate is connected to the housing via the second region, the risk of corrosion of the reinforcing layer due to sealing failure around the reinforcing layer in the first region during the connection process can be reduced.

[0018] In one or more embodiments of the first aspect, the protective plate includes a plurality of first regions, the plurality of first regions being spaced apart, and a portion of a second region being located between two adjacent first regions.

[0019] In the above scheme, the multiple first regions spaced apart can optimize the stress distribution of the protective plate and reduce the risk of excessive deformation due to excessive stress at a single point. Since a part of the second region is located between two adjacent first regions, in embodiments where the protective plate is connected to the housing through the second region, the risk of corrosion of the reinforcing layer due to sealing failure around the reinforcing layer in the first region can be reduced during the connection process between the protective plate and the housing.

[0020] In one or more embodiments of the first aspect, the protective plate further includes an adhesive layer, the reinforcing layer is connected to the first fiber resin layer through the adhesive layer, and / or, the reinforcing layer is connected to the second fiber resin layer through the adhesive layer.

[0021] In the above scheme, the adhesive layer can improve the connection strength between the reinforcing layer and the first fiber resin layer, and reduce the risk of corrosion of the reinforcing layer due to separation of the reinforcing layer from the first fiber resin layer and / or the second fiber resin layer.

[0022] In one or more embodiments of the first aspect, the thickness of the reinforcing layer is greater than or equal to the thickness of the strengthening layer.

[0023] In the above scheme, in the embodiment where the protective plate is connected to the box through the second region, the thickness of the reinforcing layer being greater than or equal to the thickness of the strengthening layer is beneficial to improving the connection stability between the protective plate and the box.

[0024] In one or more embodiments of the first aspect, the thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer.

[0025] In the above scheme, since the thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer, the second fiber resin layer has higher structural strength, which can reduce the risk of excessive deformation of the protective plate and corrosion of the reinforcement layer caused by external force acting on the protective plate through the second fiber resin layer.

[0026] In one or more embodiments of the first aspect, the first fiber resin layer includes multiple layers of first fiber-reinforced prepreg, the second fiber resin layer includes multiple layers of second fiber-reinforced prepreg, and the reinforcing layer includes multiple layers of third fiber-reinforced prepreg.

[0027] In the above scheme, while improving the strength and rigidity of the protective plate, the multi-layer structure helps to disperse stress and reduce stress concentration, thereby improving the fatigue resistance of the material.

[0028] In one or more embodiments of the first aspect, the first fiber resin layer, the second fiber resin layer, and the reinforcing layer are each independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin.

[0029] In one or more embodiments of the first aspect, the reinforcing layer is a steel plate, and the outer surface of the steel plate is provided with a galvanized layer, a galvanized iron alloy layer, or an electrophoretic paint protective layer.

[0030] In the above scheme, the outer surface of the steel plate is provided with a galvanized layer, a galvanized iron alloy layer, or an electrophoretic paint protective layer, which enables the reinforcing layer to have high wear resistance.

[0031] In one or more embodiments of the first aspect, the protective plate is a flat plate structure.

[0032] In the above solution, because the protective plate is a flat structure, it can be manufactured into a flat shape through extrusion molding, which improves the production efficiency of the protective plate. Furthermore, it reduces the assembly difficulty between the box and the protective plate. Additionally, it helps reduce the risk of seal failure between the box and the protective plate.

[0033] In one or more embodiments of the first aspect, the reinforcement layer is a flat plate structure.

[0034] In the above scheme, since the reinforcing layer is a flat plate structure, the risk of stress concentration in the reinforcing layer is low, and the structural stability is high.

[0035] In one or more embodiments of the first aspect, in the second region, a first fiber resin layer, a reinforcing layer, and a second fiber resin layer are sequentially stacked, and the reinforcing layer is connected to the first fiber resin layer and the second fiber resin layer.

[0036] In the above scheme, the reinforcing layer can further improve the strength and rigidity of the protective plate, thereby enhancing its ability to resist external impacts and improving the reliability of the battery device. In embodiments where the protective plate is connected to the housing via the reinforcing layer, the reinforcing layer can also improve the connection stability between the protective plate and the housing.

[0037] In one or more embodiments of the first aspect, the protective plate further includes a buffer layer located between the first fiber resin layer and the second fiber resin layer, the buffer layer having a first surface and a second surface disposed opposite to each other, the first surface being connected to the first fiber resin layer, and / or the second surface being connected to the second fiber resin layer.

[0038] In the above scheme, the buffer layer enables the protective plate to have a certain capacity for collapsing and absorbing energy, thereby reducing the risk of excessive deformation of the battery cells due to the transmission of impact force to the inside of the casing. At the same time, the first fiber resin layer and / or the second fiber resin layer can be tightly bonded to the buffer layer to form a relatively stable integrated structure, thereby improving the structural stability of the protective plate.

[0039] In one or more embodiments of the first aspect, the first surface is connected to the first fiber resin layer, and the two sides of the reinforcing layer are respectively connected to the second surface and the second fiber resin layer.

[0040] In the above design, the buffer layer is connected to the first fiber resin layer on one side and to the reinforcing layer on the other side. This allows the protective plate to have a relatively light weight while maintaining high strength, rigidity, structural stability, and corrosion resistance. Because the buffer layer has a reinforcing layer on one side, the risk of failure when the protective plate is subjected to slight external forces is reduced, which helps improve the reliability of the battery device.

[0041] In one or more embodiments of the first aspect, the material of the buffer layer includes at least one of balsa wood, honeycomb, rubber, foam material and rigid polyurethane.

[0042] Secondly, this application provides an electrical device that includes the battery device described in one or more of the above embodiments, the battery device being used to provide electrical energy.

[0043] In the above solutions, since the battery device in one or more of the above embodiments has high reliability, the power supply device including the battery device in one or more of the above embodiments also has high reliability.

[0044] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0045] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. 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:

[0046] Figure 1 is a structural schematic diagram of the vehicle provided in an embodiment of this application;

[0047] Figure 2 is a schematic diagram of the exploded structure of the battery device in the vehicle shown in Figure 1;

[0048] Figure 3 is a schematic diagram of the exploded structure of the protective plate in the battery device shown in Figure 2;

[0049] Figure 4 is a top view of the protective plate in the battery device shown in Figure 2.

[0050] Figure 5 is a schematic cross-sectional view of the protective plate shown in Figure 4 along line AA.

[0051] Figure 6 is an enlarged structural diagram of section B of the protective plate shown in Figure 5;

[0052] Figure 7 is a cross-sectional view of a partial structure of a battery device in some other embodiments of this application;

[0053] Figure 8 is a cross-sectional view of a portion of the structure of a battery device in some embodiments of this application;

[0054] Figure 9 is a cross-sectional view of a portion of the structure of a battery device in some embodiments of this application;

[0055] Figure 10 is a cross-sectional view of a portion of the structure of a battery device in some other embodiments of this application.

[0056] The reference numerals in the detailed embodiments are as follows: 1000 - vehicle; 100 - battery device; 10 - housing; 11 - first part; 111 - protective plate; 1111 - first fiber resin layer; 11111 - first main body; 11112 - first side; 1112 - second fiber resin layer; 11121 - second main body; 11122 - second side; 1113 - reinforcing layer; 1114 - supplementary layer; 11141 - first frame edge; 1 1142 - Second frame edge; 11143 - Glue potting groove; 1115 - Sealing cavity; 1116 - Flange; 1117 - First adhesive layer; 1118 - Second adhesive layer; 112 - Frame; 1119 - First area; 11110 - Second area; 12 - Second part; 13 - Mounting hole; 11111 - Buffer layer; 20 - Battery cell; 200 - Controller; 300 - Motor; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0057] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to 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. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "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. "A plurality" means two or more, unless otherwise explicitly defined.

[0058] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of the various components shown in the accompanying drawings in the embodiments of this application are merely illustrative and should not constitute any limitation on this application.

[0059] 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.

[0060] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0061] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0062] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0063] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0064] In some implementations, the electrode assembly is a stacked structure.

[0065] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0066] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0067] As an example, a 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 battery cells, such as hexagonal prismatic battery cells.

[0068] In related technologies, a battery cell generally includes a casing and an electrode assembly. The casing may include a housing and an end cap. The housing has an opening. After the electrode assembly is installed inside the housing, the opening of the housing can be closed by the end cap to form a sealed space inside the housing to accommodate the electrode assembly.

[0069] 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 connected in series, parallel, or mixed connections via a busbar.

[0070] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0071] 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.

[0072] 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.

[0073] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0074] 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's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0075] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0076] A typical battery pack consists of a housing and a protective plate. The housing usually includes a frame that defines the housing's internal space, within which the individual battery cells are housed. The protective plate is attached to the bottom of the frame and covers the opening in the frame to seal the internal space. The protective plate is typically made of metal; however, because it is exposed to the external environment, it is susceptible to corrosion. After prolonged corrosion, the protective plate can fail, causing the housing's internal space to become connected to the external environment. This renders the protective plate ineffective in protecting the individual battery cells, resulting in poor reliability of the battery pack.

[0077] To improve the reliability of the battery device, this application provides a battery device including a housing, battery cells, and a protective plate. The battery cells are disposed within the housing. Along the direction of gravity, the protective plate is disposed at the bottom of the battery cells. The protective plate includes a first fiber resin layer, a reinforcing layer, a second fiber resin layer, and a supplementary layer. The protective plate includes a first region, in which the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are sequentially stacked, with the first fiber resin layer located on the side of the reinforcing layer facing the battery cell. The protective plate also includes a second region, in which the first fiber resin layer, the second fiber resin layer, and the supplementary layer are sequentially stacked; or, the supplementary layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked. Since both the first and second regions include the first and second fiber resin layers, the risk of corrosion of the reinforcing and supplementary layers can be reduced, improving the reliability of the battery device. Furthermore, within the second region, the first fiber resin layer, the second fiber resin layer, and the reinforcing layer are sequentially stacked; or, the reinforcing layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked; or, the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are sequentially stacked. The reinforcing layer can improve the strength and rigidity of the second region of the protective plate, thereby improving the ability of the second region of the protective plate to resist external impacts, and also helping to improve the reliability of the battery device.

[0078] The technical solutions described in this application are applicable to batteries and electrical devices using batteries. These electrical devices can be, but are not limited to, 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.

[0079] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 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. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0080] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0081] Please refer to Figure 2, which is an exploded view of the battery device 100 provided in an embodiment of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space. Alternatively, both the first portion 11 and the second portion 12 may be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. In some embodiments, the first part 11 includes a frame 112 and a protective plate 111. The frame 112 defines the aforementioned receiving space, and the protective plate 111 may be plate-shaped. The protective plate 111 is connected to the bottom of the frame 112 and covers one end opening of the frame 112. The second part 12 is connected to the top of the frame 112 and covers the other end opening of the frame 112 to close the receiving space. Of course, the box 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0082] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0083] In the battery device 100, when there are multiple battery cells 20, the multiple battery cells 20 can be connected in series, parallel, or in a mixed manner. A mixed connection means that the multiple battery cells 20 are connected in both series and parallel configurations. The multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form battery modules, and then multiple battery modules connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, the battery device 100 may also include a busbar component for realizing the electrical connection between the multiple battery cells 20.

[0084] Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery is one that can be recharged to activate its active materials and continue to be used after being discharged. A primary battery is one that cannot be recharged to activate its active materials and continue to be used after its electrical energy is depleted. The battery cell 20 can also 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., but is not limited to these. The battery cell 20 can be a cylindrical battery cell 20, a prismatic battery cell 20, a pouch battery cell 20, or a battery cell 20 of other shapes. Prismatic battery cells 20 include prismatic battery cells 20, blade-shaped battery cells 20, and multi-prismatic battery cells 20, such as hexagonal prismatic battery cells 20, etc. This application does not have any particular limitations.

[0085] It should be noted that the housing 10 has a height direction, a length direction, and a width direction. The height direction of the housing 10 can be referred to as the Z direction, i.e., the third direction Z, shown in Figures 2, 3, 5, and 6. The width direction of the housing 10 can be referred to as the Y direction, i.e., the second direction Y, shown in Figures 2 to 6. The length direction of the housing 10 can be referred to as the X direction, i.e., the first direction X, shown in Figures 2 to 4. The housing 10 defines the external structure of the battery device 100. Therefore, the height direction of the housing 10 is the height direction of the battery device 100, the length direction of the housing 10 is the length direction of the battery device 100, and the width direction of the housing 10 is the width direction of the battery device 100. The length of the battery device 100 can be greater than or less than its width. In some embodiments, the third direction Z can also be the thickness direction of the protective plate 111.

[0086] According to some embodiments of this application, referring to Figures 2-8, this application provides a battery device 100, which includes a housing 10, a battery cell 20, and a protective plate 111. The battery cell 20 is disposed inside the housing 10. Along the direction of gravity, the protective plate 111 is disposed at the bottom of the battery cell 20. The protective plate 111 includes a first fiber resin layer 1111, a reinforcing layer 1113, a second fiber resin layer 1112, and a reinforcing layer 1114. The protective plate 111 includes a first region 1119. In the first region 1119, the first fiber resin layer 1111, the reinforcing layer 1113, and the second fiber resin layer 1112 are sequentially stacked, with the first fiber resin layer 1111 located on the surface of the reinforcing layer 1113. On one side of the battery cell 20, the protective plate 111 further includes a second region 11110, in which a first fiber resin layer 1111, a second fiber resin layer 1112, and a reinforcing layer 1114 are stacked sequentially; or, the reinforcing layer 1114, the first fiber resin layer 1111, and the second fiber resin layer 1112 are stacked sequentially; or, the first fiber resin layer 1111, the reinforcing layer 1114, and the second fiber resin layer 1112 are stacked sequentially.

[0087] In some embodiments, the housing 10 may include a frame 112 with an opening at the bottom, and a protective plate 111 closing the opening. In other embodiments, the housing 10 may also include a cover plate, with the frame 112 having two openings opposite to each other, and the cover plate and the protective plate 111 closing the two openings respectively.

[0088] The first fiber resin layer 1111 can also be referred to as the first anti-corrosion layer, the second fiber resin layer 1112 can also be referred to as the second anti-corrosion layer, and the reinforcing layer 1114 can also be referred to as the reinforcing member. In some embodiments, the reinforcing layer 1114 can be referred to as the resin frame portion, and the reinforcing layer 1113 can be referred to as the puncture-resistant plate portion.

[0089] The first fiber resin layer 1111 and the second fiber resin layer 1112 are sealed together to form a whole, and a sealed cavity 1115 is formed inside this whole. Understandably, the sealed cavity 1115 is isolated from the external environment of the protective plate 111. A first receiving groove can be formed on the surface of the first fiber resin layer 1111 facing the second fiber resin layer 1112, and the second fiber resin layer 1112 is sealed to the first fiber resin layer 1111 to close the first receiving groove, thereby forming the sealed cavity 1115. Alternatively, a second receiving groove can be formed on the surface of the second fiber resin layer 1112 facing the first fiber resin layer 1111, and the first fiber resin layer 1111 and the second fiber resin layer 1112 are sealed to close the second receiving groove, thereby forming the sealed cavity 1115. A first receiving groove can be formed on the surface of the first fiber resin layer 1111 facing the second fiber resin layer 1112, and a second receiving groove can be formed on the surface of the second fiber resin layer 1112 facing the first fiber resin layer 1111. The second fiber resin layer 1112 and the first fiber resin layer 1111 are sealed together to close the first and second receiving grooves, thereby forming the aforementioned sealed cavity 1115. The sealing connection between the first fiber resin layer 1111 and the second fiber resin layer 1112 can be, but is not limited to, bonding, welding, or pressing.

[0090] The reinforcing layer 1113 is the main component of the protective plate 111. The reinforcing layer 1113 primarily protects the battery cell 20; for example, it prevents external objects from directly impacting the battery cell 20. The reinforcing layer 1113 can be made of a metallic material, including but not limited to steel, aluminum alloy, titanium alloy, copper, and iron. In other embodiments, the reinforcing layer 1113 can also be made of a non-metallic material, such as ceramic. The reinforcing layer 1113 can have a plate-like structure and cover part or all of the opening of the frame 112. In the height direction of the housing 10, the reinforcing layer 1113 is stacked between the first fiber resin layer 1111 and the second fiber resin layer 1112. The reinforcing layer 1113 is housed within the sealing cavity 1115 to isolate it from the external environment of the protective plate 111. In some embodiments, the shape and size of the sealing cavity 1115 can be adapted to the shape and size of the reinforcing layer 1113 to limit its position.

[0091] In some embodiments, the height direction of the housing 10 can be the direction of gravity.

[0092] In some embodiments, the housing 10 is connected to the protective plate 111 via a second region 11110 of the protective plate 111. In this embodiment, the reinforcing layer 1114 not only improves the overall structural strength of the protective plate 111, but also improves the connection strength between the housing 10 and the protective plate 111.

[0093] In some embodiments, the orthographic projection of the battery cell 20 and the orthographic projection of the reinforcement layer 1113 at least partially overlap in the same projection plane perpendicular to the third direction Z.

[0094] In some embodiments, at least a portion of the orthographic projection of the battery cell 20 lies within a first region 1119 in the same projection plane perpendicular to the third direction Z.

[0095] In some embodiments, the first fiber resin layer 1111 includes a first main body portion 11111 and a first side portion 11112 connected to the side of the first main body portion 11111. The second fiber resin layer 1112 includes a second main body portion 11121 and a second side portion 11122 connected to the side of the second main body portion 11121. A sealing cavity 1115 is formed between the first main body portion 11111 and the second main body portion 11121. The first side portion 11112 and the second side portion 11122 are sealed together to form a flange portion 1116, which is used to connect the frame 112. The first main body portion 11111 is the main body portion of the first fiber resin layer 1111, the second main body portion 11121 is the main body portion of the second fiber resin layer 1112, and the sealing cavity 1115 is formed between the first main body portion 11111 and the second main body portion 11121. A first side portion 11112 is connected to the side of a first main body portion 11111, and a second side portion 11122 is connected to the side of a second main body portion 11121. The first main body portion 11111 and the second main body portion 11121 are located in a first region 1119, and the first side portion 11112 and the second side portion 11122 are located in a second region 11110. In some embodiments, referring to FIG10, the second main body portion 11121 protrudes away from the first fiber resin layer 1111 relative to the second side portion 11122, and a reinforcing layer 1114 connects the first fiber resin layer 1111 and the second side portion 11122. In other embodiments, the second main body portion 11121 protrudes away from the first fiber resin layer 1111 relative to the second side portion 11122, and the first side portion 11112 and the second side portion 11122 are sealed together to form a flange portion 1116, which is used to connect the frame 112. In this embodiment, a protective plate with a concave-convex structure can be formed by molding, which has high production efficiency.

[0096] In some embodiments, the first side portion 11112 and the second side portion 11122 are both closed-loop structures. The first side portion 11112 is arranged around the first main body portion 11111, and the second side portion 11122 is arranged around the second main body portion 11121. The first side portion 11112 and the second side portion 11122 are sealed together to form an annular sealing boundary. The annular sealing boundary is used to isolate the sealing cavity 1115 from the external environment of the protective plate 111.

[0097] In some embodiments, the protective plate 111 further includes a flange portion 1116, which is used to connect to the frame 112. The flange portion 1116 is formed by stacking and connecting a first side portion 11112 and a second side portion 11122 along the height direction of the housing 10. The flange portion 1116 is located in the second region 11110.

[0098] Understandably, when both the first side portion 11112 and the second side portion 11122 are closed-loop structures, the flange portion 1116 is also a closed-loop structure. In some embodiments, the flange portion 1116 has a first connecting hole that extends through the first side portion 11112 and the second side portion 11122, and the frame 112 has a second connecting hole. Fasteners such as bolts and rivets can be inserted through the first and second connecting holes to connect the flange portion 1116 and the frame 112. The first connecting hole can also be referred to as the mounting hole 13 below. Of course, in other embodiments, the flange portion 1116 and the frame 112 can also be connected by other methods, such as bonding or welding.

[0099] The reinforcing layer 1114 may cover the entire flange portion 1116 or only a portion of it. When the flange portion 1116 has a closed-loop structure, the number of reinforcing layers 1114 can be one or multiple. When there is only one reinforcing layer 1114, it forms a closed loop and is disposed on the flange portion 1116. When there are multiple reinforcing layers 1114, they are spaced apart along the periphery of the flange portion 1116. If the flange portion 1116 has a first connecting hole, the reinforcing layer 1114 has a third connecting hole, which is directly opposite the first connecting hole. This third connecting hole may also be referred to as mounting hole 13 below.

[0100] In some embodiments, the reinforcing layer 1114, the first side portion 11112, and the second side portion 11122 are press-fitted together.

[0101] In some embodiments, the first fiber resin layer 1111, the reinforcing layer 1113, and the second fiber resin layer 1112 are pressed together.

[0102] In the above scheme, since both the first region 1119 and the second region 11110 include a first fiber resin layer 1111 and a second fiber resin layer 1112, the risk of corrosion of the reinforcing layer 1113 and the strengthening layer 1114 can be reduced, thereby improving the reliability of the battery device 100. Furthermore, within the second region 11110, the first fiber resin layer 1111, the second fiber resin layer 1112, and the strengthening layer 1114 are sequentially stacked; or, the strengthening layer 1114, the first fiber resin layer 1111, and the second fiber resin layer 1112 are sequentially stacked. The strengthening layer 1114 can improve the strength and rigidity of the second region 11110 of the protective plate 111, thereby improving the ability of the second region 11110 of the protective plate 111 to resist external impacts, which also helps to improve the reliability of the battery device 100.

[0103] According to some embodiments of this application, please refer to Figures 2-8. In the second region 11110, the first fiber resin layer 1111, the second fiber resin layer 1112, and the reinforcing layer 1114 are stacked sequentially. The surface of the reinforcing layer 1114 facing away from the second fiber resin layer 1112 is at least partially flush with the surface of the second fiber resin layer 1112 facing away from the reinforcing layer 1113 in the first region 1119.

[0104] In some embodiments, the surface of the reinforcing layer 1114 facing away from the second fiber resin layer 1112 is flush with the surface of the second fiber resin layer 1112 facing away from the reinforcing layer 1113 within the first region 1119.

[0105] In some embodiments, the surface of the reinforcing layer 1114 facing away from the second fiber resin layer 1112 does not protrude from the surface of the second fiber resin layer 1112 facing away from the reinforcing layer 1113 within the first region 1119.

[0106] In some embodiments, a fourth receiving groove is provided on the side of the second side 11122 facing away from the first side 11112, and the reinforcing layer 1114 is accommodated in the fourth receiving groove. Understandably, the depth of the fourth receiving groove is equal to the thickness of the reinforcing layer 1114, so that the surface of the reinforcing layer 1114 facing away from the first side 11112 is flush with the surface of the second main body 11121 facing away from the first main body 11111, that is, the surface of the reinforcing layer 1114 facing away from the first side 11112 and the surface of the second main body 11121 facing away from the first main body 11111 are on the same horizontal plane.

[0107] The above solution helps to improve the flatness of the protective plate 111. When external force is applied to the protective plate 111, it helps to reduce the risk of stress concentration in the protective plate 111 leading to a decrease in the structural strength of the protective plate 111.

[0108] According to some embodiments of this application, please refer to FIG7, the first fiber resin layer 1111 has a flat plate structure.

[0109] In some embodiments, the first fiber resin layer 1111 has a flat plate structure. Within the second region 11110, the first fiber resin layer 1111, the second fiber resin layer 1112, and the reinforcing layer 1114 are sequentially stacked. The surface of the reinforcing layer 1114 facing away from the second fiber resin layer 1112 is flush with the surface of the second fiber resin layer 1112 facing away from the reinforcing layer 1113 within the first region 1119. In this embodiment, the flat protective plate 111 can be processed by extrusion molding, which helps to improve the production efficiency of the protective plate 111.

[0110] In the above scheme, since the first fiber resin layer 1111 is a flat plate structure, the first fiber resin layer 1111 can evenly distribute the impact load, which is beneficial to reducing the risk of excessive deformation of some battery cells 20 inside the box 10.

[0111] According to some embodiments of this application, please refer to FIG7. In the second region 11110, the reinforcing layer 1114, the first fiber resin layer 1111, and the second fiber resin layer 1112 are stacked sequentially. The surface of the reinforcing layer 1114 facing away from the first fiber resin layer 1111 is at least partially flush with the surface of the first fiber resin layer 1111 facing away from the reinforcing layer 1113 in the first region 1119.

[0112] In some embodiments, the surface of the reinforcing layer 1114 facing away from the first fiber resin layer 1111 is flush with the surface of the first fiber resin layer 1111 facing away from the reinforcing layer 1113 within the first region 1119.

[0113] In some embodiments, the surface of the reinforcing layer 1114 facing away from the first fiber resin layer 1111 does not protrude from the surface of the first fiber resin layer 1111 facing away from the reinforcing layer 1113 within the first region 1119.

[0114] In some embodiments, a third receiving groove is provided on the side of the first side 11112 facing away from the second side 11122, and the reinforcing layer 1114 is accommodated in the third receiving groove. Understandably, the depth of the third receiving groove is equal to the thickness of the reinforcing layer 1114, so that the surface of the reinforcing layer 1114 facing away from the second side 11122 is flush with the surface of the first main body 11111 facing away from the second main body 11121, that is, the surface of the reinforcing layer 1114 facing away from the second side 11122 and the surface of the first main body 11111 facing away from the second main body 11121 are on the same horizontal plane.

[0115] The above solution is beneficial to improving the flatness of the protective plate 111. When external force is applied to the protective plate 111 and transmitted to the first fiber resin layer 1111 and the box 10, it is beneficial to reduce the risk of stress concentration between the first fiber resin layer 1111 and the box 10, which would lead to a decrease in the connection strength between the protective plate 111 and the box 10.

[0116] According to some embodiments of this application, please refer to Figures 2-8. The reinforcing layer 1114 has a potting groove 11143 on the side facing the battery cell 20. The potting groove 11143 is used to contain sealant.

[0117] In some embodiments, the reinforcing layer 1114 has a frame-like structure, and the glue-filling groove 11143 extends along the periphery of the reinforcing layer 1114 and closes to form a closed loop structure. When the glue-filling groove 11143 contains sealant, the sealant is bonded between the reinforcing layer 1114 and the frame 112 to form an annular sealing boundary. The annular sealing boundary is disposed around the aforementioned accommodating space to isolate the aforementioned accommodating space from the external environment of the housing 10.

[0118] In the above scheme, the glue-filling tank 11143 for accommodating sealant is provided, which helps to improve the sealing performance between the protective plate 111 and the box 10.

[0119] According to some embodiments of this application, please refer to Figures 2-8. The depth of the glue potting groove 11143 is 0.1-1mm.

[0120] The depth H1 of the glue-filling groove 11143 refers to the dimension of the glue-filling groove 11143 along the height direction of the box body 10. The depth H1 of the glue-filling groove 11143 can be determined according to actual application needs, and can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc.

[0121] In the above scheme, the depth of the glue-filling groove 11143 is set within a reasonable range. On the one hand, the sealant has sufficient thickness, thereby improving the sealing effect between the protective plate 111 and the box 10. On the other hand, setting the glue-filling groove 11143 to a relatively small size can make the protective plate 111 have high structural strength as a whole, which is also conducive to improving the connection strength between the protective plate 111 and the box 10.

[0122] According to some embodiments of this application, please refer to Figures 2-8. The second fiber resin layer 1112 has a flat plate structure.

[0123] In some embodiments, the second fiber resin layer 1112 has a flat plate structure. Within the second region 11110, the reinforcing layer 1114, the first fiber resin layer 1111, and the second fiber resin layer 1112 are sequentially stacked, with the surface of the reinforcing layer 1114 facing away from the first fiber resin layer 1111 flush with the surface of the first fiber resin layer 1111 facing away from the reinforcing layer 1113 within the first region 1119. In this embodiment, the flat protective plate 111 can be processed using an extrusion molding process, which helps to improve the production efficiency of the protective plate 111.

[0124] In the above scheme, since the second fiber resin layer 1112 is a flat plate structure, the second fiber resin layer 1112 can evenly distribute the impact load. When the external force is applied to the protective plate 111 by the second fiber resin layer 1112, the risk of excessive deformation of the second fiber resin layer 1112 is reduced, which helps to reduce the risk of excessive deformation of some battery cells 20 inside the box 10.

[0125] According to some embodiments of this application, please refer to Figures 2-8, the second region 11110 is set around the first region 1119.

[0126] In some embodiments, since the second region 11110 is disposed around the first region 1119, the orthographic projection of the reinforcing layer 1114 is disposed around the orthographic projection of the reinforcing layer 1113 in the same projection plane perpendicular to the third direction Z.

[0127] The shape of the reinforcing layer 1114 can be square, sun-shaped, U-shaped, etc.

[0128] In the above scheme, since the second region 11110 surrounds the first region 1119, the overall strength distribution of the protective plate 111 is relatively uniform, and the structural stability is strong. Furthermore, in the embodiment where the protective plate 111 is connected to the housing 10 via the second region 11110, the risk of corrosion of the reinforcing layer 1113 within the first region 1119 due to sealing failure during the connection process between the protective plate 111 and the housing 10 can be reduced.

[0129] According to some embodiments of this application, please refer to Figures 2-8. The protective plate 111 includes a plurality of first regions 1119, which are spaced apart. A portion of the second region 11110 is located between two adjacent first regions 1119.

[0130] For a protective plate 111 of the same size, having multiple spaced first regions 1119 reduces the risk of excessive stress on a single point compared to having only one first region 1119. It also helps to save costs, as it is only located on the same projection plane perpendicular to the third direction Z.

[0131] In the above scheme, the spaced arrangement of multiple first regions 1119 can optimize the stress distribution of the protective plate 111 and reduce the risk of excessive deformation of the protective plate 111 under single-point stress. Since a part of the second region 11110 is located between two adjacent first regions 1119, in the embodiment where the protective plate 111 is connected to the housing 10 through the second region 11110, the risk of corrosion of the reinforcing layer 1113 in the first region 1119 due to sealing failure during the connection between the protective plate 111 and the housing 10 can be reduced.

[0132] According to some embodiments of this application, please refer to Figures 2-8. The protective plate 111 further includes an adhesive layer, the reinforcing layer 1113 is connected to the first fiber resin layer 1111 through the adhesive layer, and / or, the reinforcing layer 1113 is connected to the second fiber resin layer 1112 through the adhesive layer.

[0133] The adhesive layer may include a first adhesive layer 1117 and a second adhesive layer 1118.

[0134] The first adhesive layer 1117 is used to bond the first fiber resin layer 1111 and the reinforcing layer 1113. During the assembly of the protective plate 111, an adhesive film can be attached or an adhesive can be applied to the surface of the first fiber resin layer 1111 facing the reinforcing layer 1113 to form the first adhesive layer 1117, or an adhesive film can be attached or an adhesive can be applied to the surface of the reinforcing layer 1113 facing the first fiber resin layer 1111 to form the first adhesive layer 1117. Then, the reinforcing layer 1113 is stacked between the first fiber resin layer 1111 and the second fiber resin layer 1112 to bond the reinforcing layer 1113 to the first fiber resin layer 1111.

[0135] The second adhesive layer 1118 is used to bond the second fiber resin layer 1112 component 1112 and the reinforcing layer 1113. During the assembly of the protective plate 111, an adhesive film or adhesive can be applied to the surface of the second fiber resin layer 1112 component 1112 facing the reinforcing layer 1113 to form the second adhesive layer 1118, or an adhesive film or adhesive can be applied to the surface of the reinforcing layer 1113 facing the second fiber resin layer 1112 component 1112 to form the second adhesive layer 1118. Then, the reinforcing layer 1113 is stacked between the first fiber resin layer 1111 component 1111 and the second fiber resin layer 1112 component 1112 to bond the reinforcing layer 1113 to the second fiber resin layer 1112 component 1112.

[0136] In the above scheme, the adhesive layer can improve the connection strength between the reinforcing layer 1113 and the first fiber resin layer 1111, and reduce the risk of corrosion of the reinforcing layer 1113 caused by the separation of the reinforcing layer 1113 from the first fiber resin layer 1111 and / or the second fiber resin layer 1112.

[0137] According to some embodiments of this application, please refer to Figures 2-8, the adhesive layer thickness is 0.05mm-0.5mm.

[0138] In an embodiment where the adhesive layer includes a first adhesive layer 1117 and a second adhesive layer 1118, the thickness of the adhesive layer is 0.05mm-0.5mm, which means that the thickness H6 of the first adhesive layer 1117 is 0.05mm-0.5mm and the thickness H7 of the second adhesive layer 1118 is 0.05mm-0.5mm.

[0139] The thickness H6 of the first adhesive layer 1117 refers to the dimension of the first adhesive layer 1117 along the height direction of the housing 10. The thickness H6 of the first adhesive layer 1117 can be determined according to actual application needs, and can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc.

[0140] The thickness H7 of the second adhesive layer 1118 refers to the dimension of the second adhesive layer 1118 along the height direction of the housing 10. The thickness H7 of the second adhesive layer 1118 can be determined according to actual application needs, and can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc.

[0141] In the above solution, the thickness of the adhesive layer is set within a reasonable range. On the one hand, this effectively improves the situation of glue overflow during the bonding process between the reinforcing layer 1113 and the first fiber resin layer 1111, and / or the second fiber resin layer 1112. On the other hand, it also allows the adhesive layer to have sufficient thickness, thereby improving the connection strength between the reinforcing layer 1113 and the first fiber resin layer 1111, and / or the second fiber resin layer 1112.

[0142] According to some embodiments of this application, referring to Figures 2-8, the thickness of the reinforcing layer 1114 is greater than or equal to the thickness of the reinforcing layer 1113.

[0143] The thickness H2 of the reinforcing layer 1114 can be greater than or equal to the thickness H5 of the reinforcing layer 1113. Using any plane perpendicular to the height direction of the enclosure 10 as a reference plane, the projection of the reinforcing layer 1114 onto this reference plane can partially coincide with the projection of the reinforcing layer 1113 onto the same reference plane; that is, at least a portion of the reinforcing layer 1114 and at least a portion of the reinforcing layer 1113 are directly opposite each other along the height direction of the enclosure 10. Alternatively, the projection of the reinforcing layer 1114 onto this reference plane can not coincide with the projection of the reinforcing layer 1113 onto the same reference plane; that is, in a direction perpendicular to the height direction of the enclosure 10, the reinforcing layer 1114 and the reinforcing layer 1113 are offset from each other.

[0144] In the above scheme, in the embodiment where the protective plate 111 is connected to the box 10 through the second region 11110, the thickness of the reinforcing layer 1114 is greater than or equal to the thickness of the reinforcing layer 1113, which is beneficial to improving the connection stability between the protective plate 111 and the box 10.

[0145] According to some embodiments of this application, referring to Figures 2-8, the thickness of the first fiber resin layer 1111 is 0.1mm-1.2mm; and / or, the thickness of the second fiber resin layer 1112 is 0.1mm-1.2mm; and / or, the thickness of the reinforcing layer 1113 is 0.1mm-1mm.

[0146] The thickness H3 of the first fiber resin layer 1111 refers to the dimension of the first fiber resin layer 1111 along the height direction of the box 10.

[0147] The thickness H3 of the first fiber resin layer 1111 can be determined according to the actual application requirements, and can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, etc.

[0148] The thickness H4 of the second fiber resin layer 1112 refers to the dimension of the second fiber resin layer 1112 along the height direction of the box 10.

[0149] The thickness H4 of the second fiber resin layer 1112 can be determined according to the actual application requirements, and can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, etc.

[0150] The thickness H5 of the reinforcing layer 1113 refers to the dimension of the reinforcing layer 1113 along the height direction of the box body 10. The thickness H5 of the reinforcing layer 1113 can be determined according to actual application needs, and specifically can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc.

[0151] In the above solution, setting the thickness of the first fiber resin layer 1111 within a reasonable range, and / or setting the thickness of the second fiber resin layer 1112 within a reasonable range, and / or setting the thickness of the reinforcing layer 1113 within a reasonable range effectively controls the thickness and weight of the protection plate 111, thereby being beneficial to improving the energy density of the battery device 100.

[0152] According to some embodiments of the present application, please refer to FIGS. 2-8, the thickness of the first fiber resin layer 1111 is less than or equal to the thickness of the second fiber resin layer 1112.

[0153] Taking the electrical device as the vehicle 1000 as an example, the second fiber resin layer 1112 may be exposed to the external environment. The thickness of the first fiber resin layer 1111 is less than or equal to the thickness of the second fiber resin layer 1112. While the protection plate 111 has a high energy density, it can also reduce the risk of the protection plate 111 failing due to external forces acting on the protection plate 111.

[0154] In the above solution, since the thickness of the first fiber resin layer 1111 is less than or equal to the thickness of the second fiber resin layer 1112, the second fiber resin layer 1112 has a high structural strength, which can reduce the risk of the protection plate 111 being excessively deformed and the reinforcing layer 1113 being corroded due to external forces acting on the protection plate 111 through the second fiber resin layer 1112.

[0155] According to some embodiments of the present application, please refer to FIGS. 2-8, the reinforcing layer 1114 includes a plurality of frame edges, and the frame body structure formed by connecting the plurality of frame edges end to end.

[0156] The shape of the frame body can include but is not limited to the shape of a Chinese character 'Ri', a Chinese character 'Kou', a Chinese character 'Tian', etc.

[0157] The formation of the frame edges can include but is not limited to straight lines, arcs, wavy lines, etc.

[0158] In the above solution, the reinforcing layer 1114 is a frame body structure, which is more convenient for positioning and is beneficial to reducing the assembly difficulty of the reinforcing layer 1114.

[0159] According to some embodiments of the present application, please refer to FIGS. 2-8, the widths of the plurality of frame edges are equal.

[0160] In some embodiments, the frame edge may include a first frame edge 11141 and a second frame edge 11142. The width of the frame edge may refer to the dimension of the first frame edge 11141 in the second direction Y, and the width of the second frame edge 11142 may refer to the dimension of the second frame edge 11142 in the first direction.

[0161] In the above scheme, since the widths of multiple frame edges are equal, it is beneficial to reduce the design and manufacturing costs of the reinforcing layer 1114.

[0162] According to some embodiments of this application, referring to Figures 2-8, the protective plate 111 further includes a first frame edge 11141 extending along a first direction X and a second frame edge 11142 extending along a second direction Y. The ratio of the width of the first frame edge 11141 to the dimension of the protective plate 111 along the width direction of the first frame edge 11141 is greater than or equal to 0.05; and / or, the ratio of the width of the second frame edge 11142 to the dimension of the protective plate 111 along the width direction of the second frame edge 11142 is greater than or equal to 0.05.

[0163] In some embodiments, the protective plate 111 has a square plate structure, and correspondingly, the reinforcing layer 1114 has a square frame structure. In other words, the first frame side 11141 and the second frame side 11142 are perpendicular to each other. The dimension W2 of the protective plate 111 along the width direction of the first frame side 11141 is the width of the protective plate 111, and the dimension L of the protective plate 111 along the width direction of the second frame side 11142 is the length of the protective plate 111.

[0164] The ratio of the width W1 of the first frame edge 11141 to the dimension W2 of the protective plate 111 along the width direction of the first frame edge 11141 can be determined according to the actual application requirements, specifically it can be 0.05, 0.1, 0.15, 0.2, etc. Similarly, the ratio of the width W3 of the second frame edge 11142 to the dimension L of the protective plate 111 along the width direction of the second frame edge 11142 can be determined according to the actual application requirements, specifically it can be 0.05, 0.1, 0.15, 0.2, etc.

[0165] In the above scheme, the first frame edge 11141 and / or the second frame edge 11142 can have a larger width, thereby improving the structural strength of the protective plate 111. At the same time, in the embodiment where the box body 10 and the protective plate 111 are connected through the second region 11110, this arrangement is beneficial to improving the connection strength between the box body 10 and the protective plate 111.

[0166] According to some embodiments of this application, please refer to Figures 2-8. The protective plate 111 is provided with a plurality of mounting holes 13, which are located in the second region 11110.

[0167] Mounting hole 13 can be either a smooth hole or a threaded hole.

[0168] In some embodiments, the mounting hole 13 is provided around the first region 1119, that is, when the fastener is provided in the mounting hole 13, the fastener will not pass through the sealing cavity 1115. On the one hand, the fastener can have a higher connection strength, and on the other hand, the sealing cavity 1115 can have better sealing performance.

[0169] In the above scheme, since the mounting hole 13 is located in the second region 11110, after connecting the protective plate 111 and the box 10, the first region 1119 can still maintain a high degree of sealing, and the risk of the reinforcing layer 1113 being corroded is low.

[0170] According to some embodiments of this application, please refer to Figures 2-8. The first fiber resin layer 1111 includes multiple layers of first fiber-reinforced prepreg, the second fiber resin layer 1112 includes multiple layers of second fiber-reinforced prepreg, and the reinforcing layer 1114 includes multiple layers of third fiber-reinforced prepreg.

[0171] The fibers in each layer of the first fiber-reinforced prepreg are arranged in a unidirectional direction. The fiber orientations of adjacent layers of the first fiber-reinforced prepreg are staggered at approximately 90°, and the allowable deviation range of the layup angle of the unidirectional strips 111 of adjacent layers of the first fiber-reinforced prepreg is ±20°. When subjected to tensile force along the fiber extension direction, the fibers in the first fiber-reinforced prepreg can effectively bear the tensile force. By staggering the fiber orientations of adjacent layers of the first fiber-reinforced prepreg at approximately 90°, it is beneficial to improve the uniformity of stress distribution in all directions of the first fiber resin layer 1111.

[0172] In another embodiment, the fibers in the first fiber-reinforced prepreg are interwoven to form a woven fabric.

[0173] The fiber arrangement of the second and third fiber-reinforced prepregs is similar to that of the first fiber-reinforced prepreg, and will not be described again. In the above scheme, while improving the strength and stiffness of the protective plate 111, the multi-layer structure helps to disperse stress and reduce stress concentration, thereby improving the fatigue resistance of the material.

[0174] According to some embodiments of this application, the first fiber resin layer 1111, the second fiber resin layer 1112, and the reinforcing layer 1114 are each independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin.

[0175] According to some embodiments of this application, the reinforcing layer 1113 is a steel plate, and the outer surface of the steel plate is provided with a galvanized layer, a galvanized iron alloy layer, or an electrophoretic paint protective layer.

[0176] In the above scheme, the outer surface of the steel plate is provided with a galvanized layer, a galvanized iron alloy layer, or an electrophoretic paint protective layer, which enables the reinforcing layer 1113 to have high wear resistance.

[0177] According to some embodiments of this application, please refer to Figures 7-9. The protective plate 111 is a flat plate structure.

[0178] In the above solution, since the protective plate 111 is a flat structure, on the one hand, it can be processed into a flat shape through extrusion molding, which is beneficial to improving the production efficiency of the protective plate 111. On the other hand, it can reduce the assembly difficulty between the box 10 and the protective plate 111. Furthermore, it also helps to reduce the risk of seal failure between the box 10 and the protective plate 111.

[0179] According to some embodiments of this application, please refer to Figures 7-10. The reinforcing layer 1113 is a flat plate structure.

[0180] In the above scheme, since the reinforcing layer 1113 is a flat plate structure, the risk of stress concentration in the reinforcing layer 1113 is low, and the structural stability is high.

[0181] According to some embodiments of this application, please refer to Figures 9 and 10. In the second region 11110, the first fiber resin layer 1111, the reinforcing layer 1114, and the second fiber resin layer 1112 are stacked sequentially, and the reinforcing layer 1114 is connected to the first fiber resin layer 1111 and the second fiber resin layer 1112.

[0182] In the above scheme, the reinforcing layer 1114 can further improve the strength and rigidity of the protective plate 111, thereby improving the protective plate 111's ability to resist external impacts and also helping to improve the reliability of the battery device 100. In the embodiment where the protective plate 111 is connected to the housing 10 through the reinforcing layer 1114, the provision of the reinforcing layer 1114 can also improve the connection stability between the protective plate 111 and the housing 10.

[0183] According to some embodiments of this application, referring to Figures 9 and 10, the protective plate 111 further includes a buffer layer 11111, which is located between the first fiber resin layer 1111 and the second fiber resin layer 1112. The buffer layer 11111 has a first surface and a second surface disposed opposite to each other. The first surface is connected to the first fiber resin layer 1111, and / or the second surface is connected to the second fiber resin layer 1112.

[0184] In some embodiments, the compressive strength of the buffer layer 11111 can be any value between 1.5 MPa and 70 MPa, such as 1.5 MPa, 10 MPa, 20 MPa, 30 MPa, 40 MPa, 50 MPa, 60 MPa, 70 MPa, etc.

[0185] In some cases, the compressive strength of the buffer layer 11111 can be determined with reference to the "GBT1453-2005 Test Method for Flat Compression Performance of Sandwich Structures or Cores".

[0186] In the above scheme, the buffer layer 11111 enables the protective plate 111 to have a certain ability to collapse and absorb energy, thereby reducing the risk of excessive deformation of the battery cell 12 due to the transmission of impact force to the inside of the housing 10. At the same time, the first fiber resin layer 1111 and / or the second fiber resin layer 1112 can be tightly bonded to the buffer layer 11111 to form a relatively stable integrated structure, thereby improving the structural stability of the protective plate 111.

[0187] According to some embodiments of this application, please refer to Figures 9 and 10. The first surface is connected to the first fiber resin layer 1111, and the two sides of the reinforcing layer 1113 are respectively connected to the second surface and the second fiber resin layer 1112.

[0188] In the above scheme, the buffer layer 11111 is connected to the first fiber resin layer 1111 on one side and to the reinforcing layer 1113 on the other side. This allows the protective plate 111 to have a relatively light weight while also ensuring high strength, rigidity, structural stability, and corrosion resistance. Because the buffer layer 11111 has the reinforcing layer 1113 on one side, the risk of failure when the protective plate 111 is subjected to slight external forces is reduced, which helps improve the reliability of the battery device 100.

[0189] According to some embodiments of this application, the material of the buffer layer 11111 includes at least one of balsa wood, honeycomb, rubber, foam material and rigid polyurethane.

[0190] According to some embodiments of this application, please refer to FIG1, this application provides an electrical device that includes a battery device 100 as described in one or more of the above embodiments, the battery device 100 being used to provide electrical energy.

[0191] In the above solutions, since the battery device 100 in one or more of the above embodiments has high reliability, the power-consuming device including the battery device 100 in one or more of the above embodiments also has high reliability.

[0192] According to some embodiments of this application, please refer to FIG7. This application provides a battery device 100, which includes a housing 10, a battery cell 20, and a protective plate 111. The battery cell 20 is disposed inside the housing 10. Along the direction of gravity, the protective plate 111 is disposed at the bottom of the battery cell 20. The protective plate 111 includes a first fiber resin layer 1111, a reinforcing layer 1113, a second fiber resin layer 1112, and a reinforcing layer 1114. The protective plate 111 includes a first region 1119, in which the first fiber resin layer 1111, the reinforcing layer 1113, and the second fiber resin layer 1112 are sequentially stacked. The first fiber resin layer 1111 is located on the side of the reinforcing layer 1113 facing the battery cell 20. The protective plate 111 also includes a second region 11110, in which the first fiber resin layer 1111, the second fiber resin layer 1112, and the reinforcing layer 1114 are sequentially stacked. Within the second region 11110, a first fiber resin layer 1111, a second fiber resin layer 1112, and a reinforcing layer 1114 are sequentially stacked. The surface of the reinforcing layer 1114 facing away from the second fiber resin layer 1112 is at least partially flush with the surface of the second fiber resin layer 1112 facing away from the reinforcing layer 1113 within the first region 1119. The first fiber resin layer 1111 has a flat plate structure. The second region 11110 surrounds the first region 1119. The protective plate 111 includes a plurality of first regions 1119, which are spaced apart, and a portion of the second region 11110 is located between two adjacent first regions 1119.

[0193] According to some embodiments of this application, please refer to FIG8. This application provides a battery device 100, which includes a housing 10, a battery cell 20, and a protective plate 111. The battery cell 20 is disposed inside the housing 10. Along the direction of gravity, the protective plate 111 is disposed at the bottom of the battery cell 20. The protective plate 111 includes a first fiber resin layer 1111, a reinforcing layer 1113, a second fiber resin layer 1112, and a reinforcing layer 1114. The protective plate 111 includes a first region 1119, in which the first fiber resin layer 1111, the reinforcing layer 1113, and the second fiber resin layer 1112 are sequentially stacked. The first fiber resin layer 1111 is located on the side of the reinforcing layer 1113 facing the battery cell 20. The protective plate 111 also includes a second region 11110, in which the reinforcing layer 1114, the first fiber resin layer 1111, and the second fiber resin layer 1112 are sequentially stacked. Within the second region 11110, a reinforcing layer 1114, a first fiber resin layer 1111, and a second fiber resin layer 1112 are sequentially stacked. The surface of the reinforcing layer 1114 facing away from the first fiber resin layer 1111 is at least partially flush with the surface of the first fiber resin layer 1111 facing away from the reinforcing layer 1113 within the first region 1119. The second fiber resin layer 1112 has a flat plate structure. The second region 11110 surrounds the first region 1119. The protective plate 111 includes a plurality of first regions 1119, which are spaced apart, and a portion of the second region 11110 is located between two adjacent first regions 1119.

[0194] 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: Box; A battery cell, wherein the battery cell is disposed within the housing; A protective plate, disposed at the bottom of the battery cell along the direction of gravity, comprises a first fiber resin layer, a reinforcing layer, a second fiber resin layer, and a supplementary layer. The protective plate includes a first region in which the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are sequentially stacked, with the first fiber resin layer located on the side of the reinforcing layer facing the battery cell. The protective plate also includes a second region in which the first fiber resin layer, the second fiber resin layer, and the supplementary layer are sequentially stacked; or, the supplementary layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked; or, the first fiber resin layer, the supplementary layer, and the second fiber resin layer are sequentially stacked.

2. The battery device according to claim 1, characterized in that, In the second region, the first fiber resin layer, the second fiber resin layer, and the reinforcing layer are stacked sequentially, and the surface of the reinforcing layer facing away from the second fiber resin layer is at least partially flush with the surface of the second fiber resin layer facing away from the reinforcing layer in the first region.

3. The battery device according to claim 2, characterized in that, The first fiber resin layer has a flat plate structure.

4. The battery device according to claim 1, characterized in that, In the second region, the reinforcing layer, the first fiber resin layer, and the second fiber resin layer are stacked sequentially, and the surface of the reinforcing layer away from the first fiber resin layer is at least partially flush with the surface of the first fiber resin layer away from the reinforcing layer in the first region.

5. The battery device according to claim 4, characterized in that, The second fiber resin layer has a flat plate structure.

6. The battery device according to any one of claims 1-5, characterized in that, The second region is arranged around the first region.

7. The battery device according to claim 6, characterized in that, The protective plate includes a plurality of first regions, which are spaced apart, and a portion of the second region is located between two adjacent first regions.

8. The battery device according to any one of claims 1-7, characterized in that, The protective panel further includes an adhesive layer, through which the reinforcing layer is connected to the first fiber resin layer, and / or, through which the reinforcing layer is connected to the second fiber resin layer.

9. The battery device according to any one of claims 1-8, characterized in that, The thickness of the reinforcing layer is greater than or equal to the thickness of the strengthening layer.

10. The battery device according to any one of claims 1-9, characterized in that, The thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer.

11. The battery device according to any one of claims 1-10, characterized in that, The first fiber resin layer comprises multiple layers of first fiber-reinforced prepreg, the second fiber resin layer comprises multiple layers of second fiber-reinforced prepreg, and the reinforcing layer comprises multiple layers of third fiber-reinforced prepreg.

12. The battery device according to any one of claims 1-11, characterized in that, The first fiber resin layer, the second fiber resin layer, and the reinforcing layer are each independently selected from glass fiber reinforced polyamide resin parts, glass fiber reinforced polypropylene resin parts, glass fiber reinforced polyethylene resin parts, glass fiber reinforced polycarbonate resin parts, or glass fiber reinforced polystyrene resin parts.

13. The battery device according to any one of claims 1-12, characterized in that, The reinforcing layer is a steel plate, and the outer surface of the steel plate is provided with a galvanized layer, a galvanized iron alloy layer, or an electrophoretic paint protective layer.

14. The battery device according to any one of claims 1-13, characterized in that, The protective plate has a flat plate structure.

15. The battery device according to any one of claims 1-14, characterized in that, The reinforcing layer has a flat plate structure.

16. The battery device according to claim 1, characterized in that, In the second region, the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are stacked sequentially, and the reinforcing layer is connected to the first fiber resin layer and the second fiber resin layer.

17. The battery device according to any one of claims 1-16, characterized in that, The protective plate further includes a buffer layer located between the first fiber resin layer and the second fiber resin layer. The buffer layer has a first surface and a second surface disposed opposite to each other. The first surface is connected to the first fiber resin layer, and / or the second surface is connected to the second fiber resin layer.

18. The battery device according to claim 17, characterized in that, The first surface is connected to the first fiber resin layer, and both sides of the reinforcing layer are connected to the second surface and the second fiber resin layer, respectively.

19. The battery device according to claim 17 or 18, characterized in that, The material of the buffer layer includes at least one of balsa wood, honeycomb, rubber, foam material, and rigid polyurethane.

20. An electrical device, characterized in that, Includes a battery device as described in any one of claims 1-19, the battery device being used to provide electrical energy.

Images