Battery device and electric device

Abstract

A battery device (100) and an electric device. The battery device (100) comprises a case (10), battery cells (20), and a protection plate (111). The battery cells (20) are arranged in the case (10). In the direction of gravity, the protection plate (111) is arranged at the bottoms of the battery cells (20). The protection plate (111) comprises a first fiber resin layer (1111), an enhancement layer (1113), a second fiber resin layer (1112), and a reinforcing layer (1114). The protection plate (111) comprises a first region (1119). In the first region (1119), the first fiber resin layer (1111), the enhancement layer (1113) and the second fiber resin layer (1112) are sequentially stacked, and the first fiber resin layer (1111) is located on the side of the enhancement layer (1113) facing the battery cells (20). The protection plate (111) further comprises a second region (11110). In the second region (11110), the first fiber resin layer (1111), the second fiber resin layer (1112) and the reinforcing layer (1114) are sequentially stacked; or, the reinforcing layer (1114), the first fiber resin layer (1111) and the second fiber resin layer (1112) are sequentially stacked. The battery device (100) has high reliability.

Description

Battery device and electric device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202420775612.7, filed on April 16, 2024, entitled “Protective assembly, box, battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a battery device and an electric device. BACKGROUND

[0004] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0005] How to improve the reliability of the battery device is a problem to be solved in the battery technology.

[0006] SUMMARY

[0007] In view of the above problems, the present application provides a battery device and an electric device, which can improve the reliability of the battery device.

[0008] In a first aspect, the present application provides a battery device, which comprises a box, a battery monomer and a protective plate. The battery monomer is arranged in the box. The protective plate is arranged at the bottom of the battery monomer in the direction of gravity. The protective plate comprises a first fiber resin layer, a reinforcing layer, a second fiber resin layer and a reinforcing layer. The protective plate comprises a first area, 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 monomer. The protective plate further comprises a second area, in which 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.

[0009] In the above scheme, since the first area and the second area both comprise the first fiber resin layer and the second fiber resin layer, the risk of corrosion of the reinforcing layer and the reinforcing layer is reduced, and the reliability of the battery device is improved. In the second area, 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. The reinforcing layer can improve the strength and rigidity of the second area of the protective plate, thereby improving the ability of the second area of the protective plate to resist external force impact, and also being conducive to improving the reliability of the battery device.

[0010] In one or more embodiments of the first aspect, in the second region, the first fiber resin layer, the second fiber resin layer, and the reinforcing layer are sequentially stacked, and a surface of the reinforcing layer away from the second fiber resin layer is at least partially flush with a surface of the second fiber resin layer away from the reinforcing layer in the first region.

[0011] In the above scheme, the flatness of the protective plate is improved, and when an external force acts on the protective plate, the risk of stress concentration of the protective plate is reduced, thereby reducing the risk of structural strength reduction of the protective plate.

[0012] In one or more embodiments of the first aspect, the first fiber resin layer is a flat plate structure.

[0013] In the above scheme, since the first fiber resin layer is a flat plate structure, the first fiber resin layer can uniformly distribute impact load, thereby reducing the risk of excessive deformation of part of the battery monomers in the box.

[0014] In one or more embodiments of the first aspect, in the second region, the reinforcing layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked, and a surface of the reinforcing layer away from the first fiber resin layer is at least partially flush with a surface of the first fiber resin layer away from the reinforcing layer in the first region.

[0015] In the above scheme, the flatness of the protective plate is improved, and when an external force acts on the protective plate and is transmitted between the first fiber resin layer and the box, the risk of stress concentration between the first fiber resin layer and the box is reduced, thereby reducing the risk of reduced connection strength between the protective plate and the box.

[0016] In one or more embodiments of the first aspect, a glue pouring groove is formed on a side of the reinforcing layer facing the battery monomer, and the glue pouring groove is used to accommodate the sealant.

[0017] In the above scheme, the glue pouring groove for accommodating the sealant is provided, which is conducive to improving the sealing between the protective plate and the box.

[0018] In one or more embodiments of the first aspect, the depth of the glue pouring groove is 0.1mm-1mm.

[0019] In the above scheme, the depth of the glue pouring groove is set within a reasonable range. On the one hand, the sealant has sufficient thickness, thereby improving the sealing effect between the protective plate and the box. On the other hand, the relatively small size of the glue pouring groove makes the overall protective plate have high structural strength, which is also conducive to improving the connection strength between the protective plate and the box.

[0020] In one or more embodiments of the first aspect, the second fiber resin layer is a flat plate structure.

[0021] In the above scheme, since the second fiber resin layer is in a flat plate structure, the second fiber resin layer can uniformly distribute the impact load, and when external force acts on the protective plate through the second fiber resin layer, the risk of excessive deformation of the second fiber resin layer is reduced, thereby reducing the risk of excessive deformation of part of the battery monomers in the box.

[0022] In one or more embodiments of the first aspect, the second region surrounds the first region.

[0023] In the above scheme, since the second region surrounds the first region, the strength distribution of the protective plate as a whole is more uniform, and the structural stability is stronger. In addition, in the embodiment in which the protective plate is connected to the box through the second region, the risk of failure of the peripheral sealing of the reinforcing layer in the first region during the connection of the protective plate to the box, resulting in corrosion of the reinforcing layer, can be reduced.

[0024] In one or more embodiments of the first aspect, the protective plate comprises a plurality of first regions, and the plurality of first regions are arranged at intervals, and a part of the second region is located between adjacent two first regions.

[0025] In the above scheme, the plurality of first regions arranged at intervals can optimize the stress distribution of the protective plate and reduce the risk of excessive deformation of the protective plate under single-point stress. Since a part of the second region is located between adjacent two first regions, in the embodiment in which the protective plate is connected to the box through the second region, the risk of failure of the peripheral sealing of the reinforcing layer in the first region during the connection of the protective plate to the box, resulting in corrosion of the reinforcing layer, can be reduced.

[0026] In one or more embodiments of the first aspect, the protective plate further comprises an adhesive layer, and the reinforcing layer and the first fiber resin layer are connected through the adhesive layer, and / or the reinforcing layer and the second fiber resin layer are connected through the adhesive layer.

[0027] In the above scheme, the arrangement of 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 first fiber resin layer and / or the second fiber resin layer.

[0028] In one or more embodiments of the first aspect, the thickness of the adhesive layer is 0.05mm-0.5mm.

[0029] In the above scheme, the thickness of the adhesive layer is set within a reasonable range, on the one hand, effectively improving the overflow phenomenon during the bonding of the reinforcing layer and the first fiber resin layer and / or the second fiber resin layer; on the other hand, the adhesive layer also has sufficient thickness to improve the connection strength between the reinforcing layer and the first fiber resin layer and / or the second fiber resin layer.

[0030] 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 reinforcing layer.

[0031] In the above solution, in the embodiment in which the protective plate is connected to the box body through the second area, the thickness of the reinforcing layer being greater than or equal to the thickness of the reinforcing layer is conducive to improving the connection stability between the protective plate and the box body.

[0032] In one or more embodiments of the first aspect, the thickness of the first fiber resin layer is 0.1mm-1.2mm; and / or, the thickness of the second fiber resin layer is 0.1mm-1.2mm; and / or, the thickness of the reinforcing layer is 0.1mm-1mm.

[0033] In the above solution, the thickness of the first fiber resin layer is set within a reasonable range, and / or the thickness of the second fiber resin layer is set within a reasonable range, and / or the thickness of the reinforcing layer is set within a reasonable range, effectively controlling the thickness and weight of the protective plate, thereby facilitating the improvement of the energy density of the battery device.

[0034] 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.

[0035] In the above solution, 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 a higher structural strength, which can reduce the risk of excessive deformation of the protective plate and corrosion of the reinforcing layer after external force acts on the protective plate through the second fiber resin layer.

[0036] In one or more embodiments of the first aspect, the reinforcing layer includes a plurality of frame edges, and the plurality of frame edges are connected end to end to form a frame structure.

[0037] In the above solution, the reinforcing layer is a frame structure, which is convenient to position and facilitates the reduction of assembly difficulty of the reinforcing layer.

[0038] In one or more embodiments of the first aspect, the widths of the plurality of frame edges are equal.

[0039] In the above solution, since the widths of the plurality of frame edges are equal, the design and manufacturing costs of the reinforcing layer are reduced.

[0040] In one or more embodiments of the first aspect, the protective plate further includes a first frame edge extending in the first direction and a second frame edge extending in the second direction. The ratio of the width of the first frame edge to the size of the protective plate in the width direction of the first frame edge is greater than or equal to 0.05; and / or, the ratio of the width of the second frame edge to the size of the protective plate in the width direction of the second frame edge is greater than or equal to 0.05.

[0041] In the above scheme, the first frame edge and / or the second frame edge can have a larger width, thereby improving the structural strength of the protective plate. Meanwhile, in the embodiment in which the box and the protective plate are connected through the second region, such arrangement is conducive to improving the connection strength between the box and the protective plate.

[0042] In one or more embodiments of the first aspect, the protective plate is provided with a plurality of mounting holes, which are arranged in the second region.

[0043] In the above scheme, since the mounting holes are located in the second region, after the protective plate and the box are connected, the first region can still maintain high sealing performance, and the risk of corrosion of the reinforcing layer is low.

[0044] In one or more embodiments of the first aspect, the first fiber resin layer includes a plurality of first fiber reinforced prepregs stacked with each other, the second fiber resin layer includes a plurality of second fiber reinforced prepregs stacked with each other, and the reinforcing layer includes a plurality of third fiber reinforced prepregs stacked with each other.

[0045] 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.

[0046] 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 a glass fiber reinforced polyamide resin piece, a glass fiber reinforced polypropylene resin piece, a glass fiber reinforced polyethylene resin piece, a glass fiber reinforced polycarbonate resin piece, or a glass fiber reinforced polystyrene resin piece.

[0047] In one or more embodiments of the first aspect, the reinforcing layer is a steel plate, and an outer surface of the steel plate is provided with a zinc plating layer, a zinc-iron alloy plating layer, or an electrophoretic paint protective layer.

[0048] In the above scheme, since the outer surface of the steel plate is provided with a zinc plating layer, a zinc-iron alloy plating layer, or an electrophoretic paint protective layer, the reinforcing layer has high wear resistance.

[0049] In a second aspect, the application provides a power consumption device including the battery device in one or more embodiments described above, which is used to provide electric energy.

[0050] In the above scheme, since the battery device in one or more embodiments described above has high reliability, the power consumption device including the battery device in one or more embodiments described above also has high reliability.

[0051] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0052] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments and are therefore not intended to limit the present application in any way. Moreover, the drawings are not necessarily drawn to scale. In the drawings:

[0053] FIG. 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application;

[0054] FIG. 2 is an exploded structural schematic diagram of a battery device in the vehicle shown in FIG. 1;

[0055] FIG. 3 is an exploded structural schematic diagram of a protection plate in the battery device shown in FIG. 2;

[0056] FIG. 4 is a top structural schematic diagram of the protection plate in the battery device shown in FIG. 2;

[0057] FIG. 5 is a sectional structural schematic diagram of the protection plate shown in FIG. 4 along the direction of line A-A;

[0058] FIG. 6 is an enlarged structural schematic diagram of portion B of the protection plate shown in FIG. 5;

[0059] FIG. 7 is a sectional view of a partial structure of a battery device according to another embodiment of the present application;

[0060] FIG. 8 is a sectional view of a partial structure of a battery device according to still another embodiment of the present application.

[0061] Reference signs in the detailed description of the embodiments are as follows:

[0062] 1000 - vehicle; 100 - battery device; 10 - case; 11 - first part; 111 - shield plate; 1111 - first fiber resin layer; 11111 - first main body portion; 11112 - first edge portion; 1112 - second fiber resin layer; 11121 - second main body portion; 11122 - second edge portion; 1113 - reinforcing layer; 1114 - reinforcing layer; 11141 - first frame edge; 11142 - second frame edge; 11143 - glue filling groove; 1115 - sealing cavity; 1116 - flange portion; 1117 - first adhesive layer; 1118 - second adhesive layer; 112 - frame; 1119 - first region; 11110 - second region; 12 - second part; 13 - mounting hole; 20 - battery cell; 200 - controller; 300 - motor; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0063] It should be noted that when a component is referred to as being "fixed" or "set" on another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected" to another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second" are only for the convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features.

[0064] In the embodiments of the present application, the same reference signs represent 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 various components in the embodiments of the present application shown in the drawings are only exemplary and should not constitute any limitation on the present application.

[0065] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0066] The battery cell includes, but is not limited to, a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc.

[0067] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are intercalated and deintercalated between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, and can reduce the risk of short circuiting between the positive electrode and the negative electrode while allowing the active ions to pass through.

[0068] In some embodiments, the battery cell further includes an electrolyte, which functions to conduct ions between the positive electrode and the negative electrode. The electrolyte can be in a liquid state, a gel state, or a solid state. Among others, the liquid electrolyte includes an electrolyte salt and a solvent.

[0069] In some embodiments, the electrode assembly is in a jelly-roll structure. The positive electrode sheet and the negative electrode sheet are wound into the jelly-roll structure.

[0070] In some embodiments, the electrode assembly is in a stack structure.

[0071] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a polygonal shape, among others.

[0072] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel housing, an aluminum housing, a plastic housing (e.g., a polypropylene housing), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film, among others.

[0073] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, including a square battery cell, a blade battery cell, a polygonal battery cell (e.g., a hexagonal battery cell), among others.

[0074] In the related art, a battery cell generally includes a housing and an electrode assembly. The housing can include a housing body and an end cap. The housing body has an opening. After the electrode assembly is loaded into the housing body, the opening of the housing body can be closed by the end cap to form a sealed space inside the housing to accommodate the electrode assembly.

[0075] A battery apparatus as referred to in embodiments of the present application can include one or more battery cell assemblies to provide voltage and capacity. A battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0076] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by binding a plurality of battery cells by a cable tie.

[0077] In some embodiments, the battery device can be a battery pack, which includes a box and one or more battery cell assemblies, the battery cell assemblies are accommodated in the box.

[0078] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0079] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0080] In some embodiments, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0081] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0082] Typical battery devices include a box, which typically includes a frame and a protective plate, the frame defines an accommodation space of the box, the battery cells are accommodated in the accommodation space, and the protective plate is connected to the bottom of the frame and covers the opening of the frame to close the accommodation space of the frame. The protective plate is usually made of metal, however, since the protective plate is exposed to the external environment, the protective plate is prone to corrosion, and after long-term corrosion, the protective plate is prone to failure, causing the accommodation space of the box to be in communication with the external environment, so that the protective plate cannot play a protective role for the battery cells, and the reliability of the battery device is poor.

[0083] In order to improve the reliability of the battery device, the battery device provided by the embodiments of the present application comprises a box body, a battery cell and a protection plate. The battery cell is arranged in the box body. The protection plate is arranged at the bottom of the battery cell in the direction of gravity. The protection plate comprises a first fiber resin layer, a reinforcing layer, a second fiber resin layer and a reinforcing layer. The protection plate comprises a first area, in which the first fiber resin layer, the reinforcing layer and the second fiber resin layer are sequentially arranged. The first fiber resin layer is arranged on the side of the reinforcing layer facing the battery cell. The protection plate further comprises a second area, in which the first fiber resin layer, the second fiber resin layer and the reinforcing layer are sequentially arranged; or, the reinforcing layer, the first fiber resin layer and the second fiber resin layer are sequentially arranged. Since the first area and the second area both comprise the first fiber resin layer and the second fiber resin layer, the risk of corrosion of the reinforcing layer and the reinforcing layer is reduced, and the reliability of the battery device is improved. In the second area, the first fiber resin layer, the second fiber resin layer and the reinforcing layer are sequentially arranged; or, the reinforcing layer, the first fiber resin layer and the second fiber resin layer are sequentially arranged. The reinforcing layer can improve the strength and rigidity of the second area of the protection plate, thereby improving the ability of the second area of the protection plate to resist external force impact, and also being conducive to improving the reliability of the battery device.

[0084] The technical solutions described in the embodiments of the present application are applicable to batteries and electric devices using batteries. The electric devices can be, but are not limited to, vehicles, mobile phones, portable devices, notebook computers, ships, spacecraft, electric toys and electric tools, etc. The vehicles can be fuel cars, gas cars or new energy cars, and the new energy cars can be pure electric cars, hybrid cars or extended range cars, etc. The spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc. The electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc. The electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planes, etc.

[0085] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0086] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0087] Referring to FIG. 2, FIG. 2 is an exploded schematic diagram of the battery device 100 provided in an embodiment of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is accommodated in the box body 10. The box body 10 is used to provide an accommodation space for the battery cell 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12, the first part 11 and the second part 12 are overlapped with each other, and the first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-shaped structure, which is arranged on the open side of the second part 12 to jointly define the accommodation space with the second part 12; or the first part 11 and the second part 12 can both be hollow structures with one side open, and the open side of the first part 11 is arranged on the open side of the second part 12. In some embodiments, the first part 11 includes a frame 112 and a protective plate 111, the frame 112 defines the above-mentioned accommodation space, the protective plate 111 can be a plate-shaped structure, the protective plate 111 is connected to the bottom of the frame 112 and arranged on one end opening of the frame 112, and the second part 12 is connected to the top of the frame 112 and arranged on the other end opening of the frame 112 to close the accommodation space. Of course, the box body 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0088] In some embodiments, the case 10 can be part of a chassis structure of the vehicle 1000. For example, portions of the case 10 can become at least part of a floor of the vehicle 1000, or portions of the case 10 can become at least part of cross members and longitudinal members of the vehicle 1000.

[0089] In the battery device 100, when the battery cells 20 are multiple, the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection, where the mixed connection means that some of the multiple battery cells 20 are connected in series and some are connected in parallel. The multiple battery cells 20 can be directly connected together in series, in parallel, or in a mixed connection, and the whole of the multiple battery cells 20 is accommodated in the case 10. Of course, the battery device 100 can also be that the multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form battery modules, and the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and the whole is accommodated in the case 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing electrical connection between the multiple battery cells 20.

[0090] Each battery cell 20 can be a secondary battery or a primary battery, where the secondary battery means a battery cell 20 that can be activated by charging after discharging, and the primary battery means a battery cell 20 that cannot be activated by charging after the battery cell 20 runs out of power. The battery cell 20 can also be a lithium ion battery, a sodium ion battery, a sodium-lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but is not limited thereto. 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, where the prismatic battery cell 20 includes a square battery cell 20, a blade battery cell 20, a multi-prismatic battery cell 20, such as a hexagonal battery cell 20, etc., without particular limitation.

[0091] It should be noted that the case 10 has a height direction, a length direction, and a width direction, where the height direction of the case 10 can refer to the Z direction, i.e., the third direction Z, shown in FIGS. 2, 3, 5, and 6, the width direction of the case 10 can refer to the Y direction, i.e., the second direction Y, shown in FIGS. 2 to 6, and the length direction of the case 10 can refer to the X direction, i.e., the first direction X, shown in FIGS. 2 to 4. The case 10 defines the outer shape structure of the battery device 100, so the height direction of the case 10 is the height direction of the battery device 100, the length direction of the case 10 is the length direction of the battery device 100, and the width direction of the case 10 is the width direction of the battery device 100. The length of the battery device 100 can be greater than or less than the width. In some embodiments, the third direction Z can also be the thickness direction of the protective plate 111.

[0092] According to some embodiments of the present application, referring to FIGS. 2-8, the present application provides a battery device 100, which comprises a box 10, a battery cell 20 and a protection plate 111. The battery cell 20 is arranged in the box 10. The protection plate 111 is arranged at the bottom of the battery cell 20 along the direction of gravity, and the protection plate 111 comprises a first fiber resin layer 1111, a reinforcing layer 1113, a second fiber resin layer 1112 and a reinforcing layer 1114. The protection plate 111 comprises a first area 1119, in which the first fiber resin layer 1111, the reinforcing layer 1113 and the second fiber resin layer 1112 are sequentially arranged, and the first fiber resin layer 1111 is located on the side of the reinforcing layer 1113 facing the battery cell 20. The protection plate 111 further comprises a second area 11110, in which the first fiber resin layer 1111, the second fiber resin layer 1112 and the reinforcing layer 1114 are sequentially arranged; or, the reinforcing layer 1114, the first fiber resin layer 1111 and the second fiber resin layer 1112 are sequentially arranged.

[0093] In some embodiments, the box 10 can comprise a frame 112 and a protection plate 111, the bottom of the frame 112 has an opening, and the protection plate 111 closes the opening. In other embodiments, the box 10 can further comprise a cover plate, the frame 112 has two openings arranged oppositely, and the cover plate and the protection plate 111 close the two openings respectively.

[0094] The first fiber resin layer 1111 can also be referred to as a first corrosion prevention layer, the second fiber resin layer 1112 can also be referred to as a second corrosion prevention layer, and the reinforcing layer 1114 can also be referred to as a reinforcing member.

[0095] The first fiber resin layer 1111 and the second fiber resin layer 1112 are sealingly connected to form a whole, and a sealing cavity 1115 is formed in the whole. It can be understood that the sealing cavity 1115 is isolated from the external environment of the protection plate 111. A first accommodating 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 sealingly connected with the first fiber resin layer 1111 to close the first accommodating groove, thereby forming the sealing cavity 1115. A second accommodating groove can also 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 is sealingly connected with the second fiber resin layer 1112 to close the second accommodating groove, thereby forming the sealing cavity 1115. A first accommodating groove can also be formed on the surface of the first fiber resin layer 1111 facing the second fiber resin layer 1112, and a second accommodating groove can also be formed on the surface of the second fiber resin layer 1112 facing the first fiber resin layer 1111, and the second fiber resin layer 1112 is sealingly connected with the first fiber resin layer 1111 to close the first accommodating groove and the second accommodating groove, thereby forming the sealing 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, compression connection, etc.

[0096] The reinforcing layer 1113 is a main component of the protection plate 111, and mainly plays a role of protecting the battery monomer 20. For example, the reinforcing layer 1113 is used to block external objects from directly impacting the battery monomer 20. The reinforcing layer 1113 can be made of a metal material, which can be, but is not limited to, steel, aluminum alloy, titanium alloy, copper, iron, etc. Of course, in other embodiments, the reinforcing layer 1113 can also be made of a non-metal material, such as a ceramic material. The reinforcing layer 1113 can have a plate structure and cover part or all of the opening of the frame 112. In the height direction of the box body 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 accommodated in the sealing cavity 1115, so that the reinforcing layer 1113 is isolated from the external environment of the protection plate 111. In some embodiments, the shape and size of the sealing cavity 1115 can be matched with the shape and size of the reinforcing layer 1113 to limit the position of the reinforcing layer 1113.

[0097] In some embodiments, the height direction of the box body 10 can be the direction of gravity.

[0098] In some embodiments, the box body 10 is connected with the protection plate 111 through the second area 11110 of the protection plate 111. In this embodiment, the reinforcing layer 1114 can not only improve the overall structural strength of the protection plate 111, but also improve the connection strength between the box body 10 and the protection plate 111.

[0099] In some embodiments, the orthographic projection of the battery cell 20 at least partially overlaps with the orthographic projection of the reinforcing layer 1113 in the same projection plane perpendicular to the third direction Z.

[0100] In some embodiments, at least part of the orthographic projection of the battery cell 20 is located in the first region 1119 in the same projection plane perpendicular to the third direction Z.

[0101] In some embodiments, the first fiber resin layer 1111 includes a first main body part 11111 and a first edge part 11112 connected to the edge side of the first main body part 11111, the second fiber resin layer 1112 includes a second main body part 11121 and a second edge part 11122 connected to the edge side of the second main body part 11121, a sealed cavity 1115 is formed between the first main body part 11111 and the second main body part 11121, the first edge part 11112 and the second edge part 11122 are sealingly connected to form a flange part 1116, and the flange part 1116 is used to connect the frame 112. The first main body part 11111 is the main part of the first fiber resin layer 1111, the second main body part 11121 is the main part of the second fiber resin layer 1112, and the sealed cavity 1115 is formed between the first main body part 11111 and the second main body part 11121. The first edge part 11112 is connected to the edge side of the first main body part 11111, and the second edge part 11122 is connected to the edge side of the second main body part 11121. Among them, the first main body part 11111 and the second main body part 11121 are located in the first region 1119, and the first edge part 11112 and the second edge part 11122 are located in the second region 11110.

[0102] In some embodiments, the first edge part 11112 and the second edge part 11122 are both in a closed loop structure, the first edge part 11112 is arranged around the first main body part 11111, the second edge part 11122 is arranged around the second main body part 11121, and the first edge part 11112 and the second edge part 11122 are sealingly connected to form a ring-shaped sealing boundary, and the ring-shaped sealing boundary is used to isolate the sealed cavity 1115 from the external environment of the protective plate 111.

[0103] In some embodiments, the protective plate 111 further includes a flange part 1116, which is a part used to connect the above-mentioned frame 112. The flange part 1116 is formed by the first edge part 11112 and the second edge part 11122 being stacked along the height direction of the box body 10 and connected to each other. Among them, the flange part 1116 is located in the second region 11110.

[0104] It can be understood that, in the case that the first edge portion 11112 and the second edge portion 11122 are both in a closed loop structure, the flange portion 1116 is also in a closed loop structure. In some embodiments, a first connecting hole is formed on the flange portion 1116, the first connecting hole penetrates the first edge portion 11112 and the second edge portion 11122, and a second connecting hole is formed on the frame 112. A fastener such as a bolt or a rivet can be used to pass through the first connecting hole and the second connecting hole to connect the flange portion 1116 and the frame 112. The first connecting hole can also be referred to as the mounting hole 13 described below. Of course, in other embodiments, the flange portion 1116 and the frame 112 can also be connected in other ways, such as adhesion or welding.

[0105] The reinforcing layer 1114 can cover all of the flange portion 1116, or can cover part of the flange portion 1116. In the case that the flange portion 1116 is in a closed loop structure, the number of reinforcing layers 1114 can be one or more. In the case that the number of reinforcing layers 1114 is one, the reinforcing layer 1114 is in a closed loop structure and is arranged on the flange portion 1116. In the case that the number of reinforcing layers 1114 is more than one, the plurality of reinforcing layers 1114 are arranged along the periphery of the flange portion 1116. In the case that the flange portion 1116 is provided with a first connecting hole, the reinforcing layer 1114 is provided with a third connecting hole, and the third connecting hole is arranged opposite to the first connecting hole. The third connecting hole can also be referred to as the mounting hole 13 described below.

[0106] In some embodiments, the reinforcing layer 1114, the first edge portion 11112 and the second edge portion 11122 are connected by pressing.

[0107] In some embodiments, the first fiber resin layer 1111, the reinforcing layer 1113 and the second fiber resin layer 1112 are connected.

[0108] In the above scheme, since the first region 1119 and the second region 11110 both include the first fiber resin layer 1111 and the second fiber resin layer 1112, the risk of corrosion of the reinforcing layer 1113 and the reinforcing layer 1114 can be reduced, and the reliability of the battery device 100 can be improved. In the second region 11110, the first fiber resin layer 1111, the second fiber resin layer 1112 and the reinforcing layer 1114 are sequentially stacked, or the reinforcing layer 1114, the first fiber resin layer 1111 and the second fiber resin layer 1112 are sequentially stacked. The reinforcing 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 force impact, and also being conducive to improving the reliability of the battery device 100.

[0109] According to some embodiments of the present application, referring to FIGS. 2-8, in the second area 11110, the first fiber resin layer 1111, the second fiber resin layer 1112 and the reinforcing layer 1114 are sequentially stacked, and the surface of the reinforcing layer 1114 away from the second fiber resin layer 1112 is at least partially flush with the surface of the second fiber resin layer 1112 away from the reinforcing layer 1113 in the first area 1119.

[0110] In some embodiments, the surface of the reinforcing layer 1114 away from the second fiber resin layer 1112 is flush with the surface of the second fiber resin layer 1112 away from the reinforcing layer 1113 in the first area 1119.

[0111] In some embodiments, the surface of the reinforcing layer 1114 away from the second fiber resin layer 1112 is not protruded from the surface of the second fiber resin layer 1112 away from the reinforcing layer 1113 in the first area 1119.

[0112] In some embodiments, the fourth accommodating groove is arranged on the side of the second edge portion 11122 away from the first edge portion 11112, and the reinforcing layer 1114 is accommodated in the fourth accommodating groove. Understandably, the depth of the fourth accommodating groove is equal to the thickness of the reinforcing layer 1114, so that the surface of the reinforcing layer 1114 away from the first edge portion 11112 is flush with the surface of the second main body portion 11121 away from the first main body portion 11111, i.e., the surface of the reinforcing layer 1114 away from the first edge portion 11112 is in the same horizontal plane as the surface of the second main body portion 11121 away from the first main body portion 11111.

[0113] In the above scheme, the flatness of the protective plate 111 is improved, and when an external force acts on the protective plate 111, the risk of stress concentration of the protective plate 111 and the decline of the structural strength of the protective plate 111 is reduced.

[0114] According to some embodiments of the present application, referring to FIG. 7, the first fiber resin layer 1111 is a flat plate structure.

[0115] In some embodiments, the first fiber resin layer 1111 is a flat plate structure, and in the second area 11110, the first fiber resin layer 1111, the second fiber resin layer 1112 and the reinforcing layer 1114 are sequentially stacked, and the surface of the reinforcing layer 1114 away from the second fiber resin layer 1112 is flush with the surface of the second fiber resin layer 1112 away from the reinforcing layer 1113 in the first area 1119. In this embodiment, the flat plate-shaped protective plate 111 can be processed by an extrusion molding process, which is beneficial to improve the production efficiency of the protective plate 111.

[0116] In the above scheme, since the first fiber resin layer 1111 has a flat plate structure, the first fiber resin layer 1111 can uniformly distribute the impact load, thereby reducing the risk of excessive deformation of some battery monomers 20 in the box body 10.

[0117] According to some embodiments of the present application, referring to FIG. 7, in the second area 11110, the reinforcing layer 1114, the first fiber resin layer 1111 and the second fiber resin layer 1112 are sequentially stacked, and the surface of the reinforcing layer 1114 away from the first fiber resin layer 1111 is at least partially flush with the surface of the first fiber resin layer 1111 in the first area 1119 away from the reinforcing layer 1113.

[0118] In some embodiments, the surface of the reinforcing layer 1114 away from the first fiber resin layer 1111 is flush with the surface of the first fiber resin layer 1111 in the first area 1119 away from the reinforcing layer 1113.

[0119] In some embodiments, the surface of the reinforcing layer 1114 away from the first fiber resin layer 1111 is not protruding from the surface of the first fiber resin layer 1111 in the first area 1119 away from the reinforcing layer 1113.

[0120] In some embodiments, the first edge portion 11112 is provided with a third accommodating groove on the side away from the second edge portion 11122, and the reinforcing layer 1114 is accommodated in the third accommodating groove. Understandably, the depth of the third accommodating groove is equal to the thickness of the reinforcing layer 1114, so that the surface of the reinforcing layer 1114 away from the second edge portion 11122 is flush with the surface of the first main body portion 11111 away from the second main body portion 11121, i.e. the surface of the reinforcing layer 1114 away from the second edge portion 11122 is on the same horizontal plane as the surface of the first main body portion 11111 away from the second main body portion 11121.

[0121] In the above scheme, it is beneficial to improve the flatness of the protective plate 111, and when an external force acts on the protective plate 111 and is transmitted between the first fiber resin layer 1111 and the box body 10, it is beneficial to reduce the risk of stress concentration between the first fiber resin layer 1111 and the box body 10, thereby reducing the connection strength between the protective plate 111 and the box body 10.

[0122] According to some embodiments of the present application, referring to FIGS. 2-8, the reinforcing layer 1114 is provided with a glue pouring groove 11143 on the side facing the battery monomer 20, and the glue pouring groove 11143 is used to accommodate the sealant.

[0123] In some embodiments, the reinforcing layer 1114 has a frame structure, and the glue channel 11143 extends along the periphery of the reinforcing layer 1114 and is closed to form a closed loop structure. In the case where the glue channel 11143 contains sealant, the sealant is bonded to the reinforcing layer 1114 and the frame 112 to form an annular sealing boundary, which is arranged around the above-mentioned containing space to isolate the above-mentioned containing space from the external environment of the cabinet 10.

[0124] In the above scheme, the glue channel 11143 containing sealant is provided, which is beneficial to improve the sealing between the protective plate 111 and the cabinet 10.

[0125] According to some embodiments of the present application, referring to FIGS. 2-8, the depth of the glue channel 11143 is 0.1-1 mm.

[0126] The depth H1 of the glue channel 11143 refers to the size of the glue channel 11143 in the height direction of the cabinet 10. The depth H1 of the glue channel 11143 can be determined according to actual application needs, and can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0127] In the above scheme, the depth of the glue channel 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 cabinet 10. On the other hand, the relatively small size of the glue channel 11143 makes the protective plate 111 have high structural strength as a whole, which is also beneficial to improve the connection strength between the protective plate 111 and the cabinet 10.

[0128] According to some embodiments of the present application, referring to FIGS. 2-8, the second fiber resin layer 1112 has a flat plate structure.

[0129] In some embodiments, the second fiber resin layer 1112 has a flat plate structure. In the second region 11110, the reinforcing layer 1114, the first fiber resin layer 1111, and the second fiber resin layer 1112 are sequentially stacked, and the surface of the reinforcing layer 1114 away from the first fiber resin layer 1111 is flush with the surface of the first fiber resin layer 1111 away from the reinforcing layer 1113 in the first region 1119. In this embodiment, the protective plate 111 can be processed by an extrusion molding process to have a flat plate structure, which is beneficial to improve the production efficiency of the protective plate 111.

[0130] In the above scheme, since the second fiber resin layer 1112 has a flat plate structure, the second fiber resin layer 1112 can uniformly distribute the impact load, and when external force acts on the protective plate 111 through the second fiber resin layer 1112, the risk of excessive deformation of the second fiber resin layer 1112 is reduced, thereby reducing the risk of excessive deformation of part of the battery monomers 20 in the box body 10.

[0131] According to some embodiments of the present application, referring to FIGS. 2-8, the second area 11110 is arranged around the first area 1119.

[0132] In some embodiments, since the second area 11110 is arranged around the first area 1119, the orthographic projection of the reinforcing layer 1114 is arranged around the orthographic projection of the reinforcing layer 1113 in the same projection plane perpendicular to the third direction Z.

[0133] The shape of the reinforcing layer 1114 can be a mouth-shaped, a sun-shaped, a U-shaped, etc.

[0134] In the above scheme, since the second area 11110 is arranged around the first area 1119, the strength distribution of the protective plate 111 as a whole is more uniform, and the structural stability is stronger. In addition, in the embodiment in which the protective plate 111 is connected to the box body 10 through the second area 11110, the risk of failure of the peripheral sealing of the reinforcing layer 1113 in the first area 1119, resulting in corrosion of the reinforcing layer 1113, during the connection of the protective plate 111 to the box body 10 can be reduced.

[0135] According to some embodiments of the present application, referring to FIGS. 2-8, the protective plate 111 includes a plurality of first areas 1119, the plurality of first areas 1119 are arranged at intervals, and part of the second area 11110 is located between two adjacent first areas 1119.

[0136] Compared with the case where only one first area 1119 is arranged, the protective plate 111 with the same size can reduce the risk of excessive stress on a single point when a plurality of first areas 1119 are arranged at intervals. It is also beneficial to save costs, i.e., only in the same projection plane perpendicular to the third direction Z.

[0137] In the above scheme, the plurality of first areas 1119 arranged at intervals can optimize the stress distribution of the protective plate 111, and reduce the risk of excessive deformation of the protective plate 111 due to excessive stress on a single point. Since part of the second area 11110 is located between two adjacent first areas 1119, in the embodiment in which the protective plate 111 is connected to the box body 10 through the second area 11110, the risk of failure of the peripheral sealing of the reinforcing layer 1113 in the first area 1119, resulting in corrosion of the reinforcing layer 1113, during the connection of the protective plate 111 to the box body 10 can be reduced.

[0138] According to some embodiments of the present application, referring to FIGS. 2-8, the protective plate 111 further comprises an adhesive layer, the reinforcing layer 1113 and the first fiber resin layer 1111 are connected through the adhesive layer, and / or the reinforcing layer 1113 and the second fiber resin layer 1112 are connected through the adhesive layer.

[0139] The adhesive layer can comprise a first adhesive layer 1117 and a second adhesive layer 1118.

[0140] The first adhesive layer 1117 is used to bond the first fiber resin layer 1111 and the reinforcing layer 1113. In the assembly process of the protective plate 111, an adhesive film can be attached or an adhesive can be coated on 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 coated on the surface of the reinforcing layer 1113 facing the first fiber resin layer 1111 to form the first adhesive layer 1117, and then the reinforcing layer 1113 is arranged between the first fiber resin layer 1111 and the second fiber resin layer 1112 to bond the reinforcing layer 1113 and the first fiber resin layer 1111.

[0141] The second adhesive layer 1118 is used to bond the second fiber resin layer 1112 and the reinforcing layer 1113. In the assembly process of the protective plate 111, an adhesive film can be attached or an adhesive can be coated on the surface of the second fiber resin layer 1112 facing the reinforcing layer 1113 to form the second adhesive layer 1118, or an adhesive film can be attached or an adhesive can be coated on the surface of the reinforcing layer 1113 facing the second fiber resin layer 1112 to form the second adhesive layer 1118, and then the reinforcing layer 1113 is arranged between the first fiber resin layer 1111 and the second fiber resin layer 1112 to bond the reinforcing layer 1113 and the second fiber resin layer 1112.

[0142] In the above scheme, the arrangement of the adhesive layer can improve the connection strength of the reinforcing layer 1113 and the first fiber resin layer 1111, and reduce the risk of corrosion of the reinforcing layer 1113 caused by separation of the reinforcing layer 1113 and the first fiber resin layer 1111, and / or the second fiber resin layer 1112.

[0143] According to some embodiments of the present application, referring to FIGS. 2-8, the thickness of the adhesive layer is 0.05mm-0.5mm.

[0144] In the embodiment in which the adhesive layer comprises the first adhesive layer 1117 and the 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.

[0145] 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 cabinet 10. The thickness H6 of the first adhesive layer 1117 can be determined according to actual application needs, and can be specifically 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc.

[0146] 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 cabinet 10. The thickness H7 of the second adhesive layer 1118 can be determined according to actual application needs, and can be specifically 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc.

[0147] In the above scheme, the thickness of the adhesive layer is set within a reasonable range, on the one hand, effectively improving the overflow phenomenon in the process of bonding the reinforcing layer 1113 and the first fiber resin layer 1111 and / or the second fiber resin layer 1112; on the other hand, the adhesive layer also has sufficient thickness, which improves the connection strength between the reinforcing layer 1113 and the first fiber resin layer 1111 and / or the second fiber resin layer 1112.

[0148] According to some embodiments of the present application, please refer to FIGS. 2-8, the thickness of the reinforcing layer 1114 is greater than or equal to the thickness of the reinforcing layer 1113.

[0149] The thickness H2 of the reinforcing layer 1114 can be greater than the thickness H5 of the reinforcing layer 1113, or can be equal to the thickness H5 of the reinforcing layer 1113. Taking any plane perpendicular to the height direction of the cabinet 10 as a reference plane, the projection of the reinforcing layer 1114 on the reference plane can partially coincide with the projection of the reinforcing layer 1113 on the reference plane, that is, at least part of the reinforcing layer 1114 and at least part of the reinforcing layer 1113 are arranged opposite to each other along the height direction of the cabinet 10. The projection of the reinforcing layer 1114 on the reference plane can also not coincide with the projection of the reinforcing layer 1113 on the reference plane, that is, in the direction perpendicular to the height direction of the cabinet 10, the reinforcing layer 1114 and the reinforcing layer 1113 are arranged in a staggered manner.

[0150] In the above scheme, in the embodiment in which the protective plate 111 is connected to the cabinet 10 through the second area 11110, the thickness of the reinforcing layer 1114 being greater than or equal to the thickness of the reinforcing layer 1113 is beneficial to improve the connection stability between the protective plate 111 and the cabinet 10.

[0151] According to some embodiments of the present application, referring to FIGS. 2-8, the thickness of the first fiber resin layer 1111 is 0.1-1.2 mm; and / or, the thickness of the second fiber resin layer 1112 is 0.1-1.2 mm; and / or, the thickness of the reinforcing layer 1113 is 0.1-1 mm.

[0152] 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 body 10.

[0153] The thickness H3 of the first fiber resin layer 1111 can be determined according to actual application needs, and can be specifically 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, etc.

[0154] 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 body 10.

[0155] The thickness H4 of the second fiber resin layer 1112 can be determined according to actual application needs, and can be specifically 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, etc.

[0156] 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 can be specifically 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0157] In the above scheme, the thickness of the first fiber resin layer 1111 is set within a reasonable range, and / or the thickness of the second fiber resin layer 1112 is set within a reasonable range, and / or the thickness of the reinforcing layer 1113 is set within a reasonable range, effectively controlling the thickness and weight of the protection plate 111, thereby facilitating the improvement of the energy density of the battery device 100.

[0158] According to some embodiments of the present application, referring 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.

[0159] For example, the power consuming device is the vehicle 1000, the second fiber resin layer 1112 can 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, the protective plate 111 has a high energy density, and the risk of failure of the protective plate 111 caused by external force acting on the protective plate 111 can be reduced.

[0160] In the above scheme, 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, and the risk of excessive deformation of the protective plate 111 caused by external force acting on the protective plate 111 through the second fiber resin layer 1112 and corrosion of the reinforcing layer 1113 can be reduced.

[0161] According to some embodiments of the present application, referring to FIGS. 2-8, the reinforcing layer 1114 includes a plurality of frame edges connected end to end to form a frame structure.

[0162] The shape of the frame can include, but is not limited to, a sun-shaped, a mouth-shaped, a field-shaped, etc.

[0163] The formation of the frame edge can include, but is not limited to, a straight line type, an arc line type, a wave shape, etc.

[0164] In the above scheme, the reinforcing layer 1114 is a frame structure, which is convenient to position and helps to reduce the assembly difficulty of the reinforcing layer 1114.

[0165] According to some embodiments of the present application, referring to FIGS. 2-8, the widths of the plurality of frame edges are equal.

[0166] In some embodiments, the frame edge can include a first frame edge 11141 and a second frame edge 11142, the width of the frame edge can refer to the size of the first frame edge 11141 in the second direction Y, and the width of the second frame edge 11142 can refer to the size of the second frame edge 11142 in the first direction.

[0167] In the above scheme, since the widths of the plurality of frame edges are equal, the design and manufacturing costs of the reinforcing layer 1114 can be reduced.

[0168] According to some embodiments of the present application, referring to FIGS. 2-8, the protective plate 111 further includes a first frame edge 11141 extending along the first direction X and a second frame edge 11142 extending along the second direction Y. The ratio of the width of the first frame edge 11141 to the size of the protective plate 111 in 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 size of the protective plate 111 in the width direction of the second frame edge 11142 is greater than or equal to 0.05.

[0169] In some embodiments, the protective plate 111 is in a square plate structure, and correspondingly, the reinforcing layer 1114 is in a square frame structure, in other words, the first frame edge 11141 is perpendicular to the second frame edge 11142, the size W2 of the protective plate 111 along the width direction of the first frame edge 11141 is the width of the protective plate 111, and the size L of the protective plate 111 along the width direction of the second frame edge 11142 is the length of the protective plate 111.

[0170] The ratio of the width W1 of the first frame edge 11141 to the size W2 of the protective plate 111 along the width direction of the first frame edge 11141 can be determined according to actual application needs, and 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 size L of the protective plate 111 along the width direction of the second frame edge 11142 can be determined according to actual application needs, and can be 0.05, 0.1, 0.15, 0.2, etc.

[0171] 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. Meanwhile, in embodiments in which the cabinet 10 and the protective plate 111 are connected through the second region 11110, such a configuration is conducive to improving the connection strength between the cabinet 10 and the protective plate 111.

[0172] According to some embodiments of the present application, referring to FIGS. 2-8, the protective plate 111 is provided with a plurality of mounting holes 13, and the mounting holes 13 are arranged in the second region 11110.

[0173] The mounting holes 13 can be blind holes or threaded holes.

[0174] In some embodiments, the mounting holes 13 are arranged around the first region 1119, that is, when a fastener is arranged in the mounting hole 13, the fastener does not pass through the sealing cavity 1115, which can improve the connection strength of the fastener and also improve the sealing performance of the sealing cavity 1115.

[0175] In the above scheme, since the mounting holes 13 are located in the second region 11110, after the protective plate 111 and the cabinet 10 are connected, the first region 1119 can still have high sealing performance, and the risk of corrosion of the reinforcing layer 1113 is low.

[0176] According to some embodiments of the present application, referring to FIGS. 2-8, the first fiber resin layer 1111 includes a plurality of first fiber reinforced prepregs stacked with each other, the second fiber resin layer 1112 includes a plurality of second fiber reinforced prepregs stacked with each other, and the reinforcing layer 1114 includes a plurality of third fiber reinforced prepregs stacked with each other.

[0177] The fibers in each layer of the first fiber reinforced prepreg are arranged in a unidirectional manner, the fiber arrangement directions of the two adjacent layers of the first fiber prepreg are staggered at approximately 90 degrees, and the range of allowable deviation of the layer angle of the two adjacent layers of the first fiber reinforced prepreg unidirectional tape 111 is ±20 degrees. When subjected to a tensile force in the direction of fiber extension, the fibers in the first fiber reinforced prepreg can effectively bear the tensile force, and by arranging the fiber arrangement directions of the two adjacent layers of the first fiber reinforced prepreg in a staggered manner at approximately 90 degrees, the stress uniformity of the first fiber resin layer 1111 in all directions is improved.

[0178] In another embodiment, the fibers in the first fiber reinforced prepreg are formed into a woven cloth in a staggered manner.

[0179] The fiber arrangement of the second fiber reinforced prepreg and the third fiber reinforced prepreg 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 rigidity 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.

[0180] According to some embodiments of the present application, the first fiber resin layer 1111, the second fiber resin layer 1112, and the reinforcing layer 1114 are each independently selected from a glass fiber reinforced polyamide resin piece, a glass fiber reinforced polypropylene resin piece, a glass fiber reinforced polyethylene resin piece, a glass fiber reinforced polycarbonate resin piece, or a glass fiber reinforced polystyrene resin piece.

[0181] According to some embodiments of the present application, the reinforcing layer 1113 is a steel plate, and the outer surface of the steel plate is provided with a zinc plating layer, a zinc alloy plating layer, or an electrophoretic paint protective layer.

[0182] In the above scheme, since the outer surface of the steel plate is provided with a zinc plating layer, a zinc alloy plating layer, or an electrophoretic paint protective layer, the reinforcing layer 1113 has high wear resistance.

[0183] According to some embodiments of the present application, referring to FIG. 1, the present application provides a power consuming device, which includes the battery device 100 in one or more embodiments described above, and the battery device 100 is used to provide electric energy.

[0184] In the above scheme, since the battery device 100 in one or more embodiments described above has high reliability, the power consuming device including the battery device 100 in one or more embodiments described above also has high reliability.

[0185] According to some embodiments of the present application, referring to FIG. 7, the present application provides a battery device 100, the battery device 100 comprises a box 10, a battery cell 20 and a protection plate 111. The battery cell 20 is arranged in the box 10. The protection plate 111 is arranged at the bottom of the battery cell 20 along the direction of gravity. The protection plate 111 comprises a first fiber resin layer 1111, a reinforcing layer 1113, a second fiber resin layer 1112 and a reinforcing layer 1114. The protection plate 111 comprises a first area 1119. In the first area 1119, the first fiber resin layer 1111, the reinforcing layer 1113 and the second fiber resin layer 1112 are sequentially arranged in layers. The first fiber resin layer 1111 is located on the side of the reinforcing layer 1113 facing the battery cell 20. The protection plate 111 further comprises a second area 11110. In the second area 11110, the first fiber resin layer 1111, the second fiber resin layer 1112 and the reinforcing layer 1114 are sequentially arranged in layers. In the second area 11110, the first fiber resin layer 1111, the second fiber resin layer 1112 and the reinforcing layer 1114 are sequentially arranged in layers. The surface of the reinforcing layer 1114 away from the second fiber resin layer 1112 is at least partially flush with the surface of the second fiber resin layer 1112 away from the reinforcing layer 1113 in the first area 1119. The first fiber resin layer 1111 is a flat plate structure. The second area 11110 is arranged around the first area 1119. The protection plate 111 comprises a plurality of first areas 1119. The plurality of first areas 1119 are arranged at intervals. A part of the second area 11110 is located between two adjacent first areas 1119.

[0186] According to some embodiments of the present application, referring to FIG. 8, the present application provides a battery device 100, which comprises a box 10, a battery cell 20 and a protection plate 111. The battery cell 20 is arranged in the box 10. The protection plate 111 is arranged at the bottom of the battery cell 20 along the direction of gravity. The protection plate 111 comprises a first fiber resin layer 1111, a reinforcing layer 1113, a second fiber resin layer 1112 and a reinforcing layer 1114. The protection plate 111 comprises a first area 1119, in which the first fiber resin layer 1111, the reinforcing layer 1113 and the second fiber resin layer 1112 are sequentially arranged. The first fiber resin layer 1111 is arranged on the side of the reinforcing layer 1113 facing the battery cell 20. The protection plate 111 further comprises a second area 11110, in which the reinforcing layer 1114, the first fiber resin layer 1111 and the second fiber resin layer 1112 are sequentially arranged. In the second area 11110, the reinforcing layer 1114, the first fiber resin layer 1111 and the second fiber resin layer 1112 are sequentially arranged. The surface of the reinforcing layer 1114 away from the first fiber resin layer 1111 is at least partially flush with the surface of the first fiber resin layer 1111 away from the reinforcing layer 1113 in the first area 1119. The second fiber resin layer 1112 has a flat plate structure. The second area 11110 is arranged around the first area 1119. The protection plate 111 comprises a plurality of first areas 1119, which are arranged at intervals. A part of the second area 11110 is located between two adjacent first areas 1119.

[0187] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, each technical feature mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present 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 by, The application relates to a battery pack, comprising: a box; a battery cell arranged in the box; a protection plate arranged at the bottom of the battery cell along the direction of gravity, the protection plate comprising a first fiber resin layer, a reinforcing layer, a second fiber resin layer and a reinforcing layer, the protection plate comprising a first area in which the first fiber resin layer, the reinforcing layer and the second fiber resin layer are sequentially arranged, the first fiber resin layer being arranged on the side of the reinforcing layer facing the battery cell, and the protection plate further comprising a second area in which the first fiber resin layer, the second fiber resin layer and the reinforcing layer are sequentially arranged or the reinforcing layer, the first fiber resin layer and the second fiber resin layer are sequentially arranged. In the second area, the first fiber resin layer, the second fiber resin layer and the reinforcing layer are sequentially arranged, 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 area. The first fiber resin layer is in a flat plate structure. In the second area, the reinforcing layer, the first fiber resin layer and the second fiber resin layer are sequentially arranged, 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 area.

2. The battery device according to claim 1, characterized by The side of the reinforcing layer facing the battery cell is provided with a glue pouring groove for accommodating sealant.

3. The battery device of claim 2, wherein, The glue pouring groove has a depth of 0.1-1 mm.

4. The battery device of claim 1, wherein The second fiber resin layer is in a flat plate structure.

5. The battery device of claim 4, wherein, The second area surrounds the first area.

6. The battery device of claim 5, wherein, The protection plate comprises a plurality of first areas which are arranged at intervals, and a part of the second area is located between two adjacent first areas.

7. The battery device of claim 4, wherein The protection plate further comprises an adhesive layer, and the reinforcing layer and the first fiber resin layer are connected through the adhesive layer, and / or the reinforcing layer and the second fiber resin layer are connected through the adhesive layer.

8. The battery device according to any one of claims 1 to 5, wherein The adhesive layer has a thickness of 0.05-0.5 mm.

9. The battery device of claim 8, wherein, The thickness of the reinforcing layer is greater than or equal to the thickness of the reinforcing layer.

10. The battery device according to any one of claims 1-9, wherein, The thickness of the first fiber resin layer is 0.1-1.2 mm, and / or the thickness of the second fiber resin layer is 0.1-1.2 mm, and / or the thickness of the reinforcing layer is 0.1-1 mm.

11. The battery device of claim 10, wherein, The thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer.

12. The battery device of any one of claims 1-11, wherein, The reinforcing layer comprises a plurality of frame edges which are connected in a loop to form a frame structure.

13. The battery device of any one of claims 1-12, wherein, The widths of the frame edges are equal.

14. The battery device of any one of claims 1-13, wherein, The protection plate further comprises a first frame edge extending in a first direction and a second frame edge extending in a second direction.

15. The battery device of any one of claims 1-14, wherein, The ratio of the width of the first frame edge to the size of the protection plate in the width direction of the first frame edge is greater than or equal to 0.05, and / or the ratio of the width of the second frame edge to the size of the protection plate in the width direction of the second frame edge is greater than or equal to 0.

05.

16. The battery device of claim 15, wherein, ​ 17. The battery device of claim 15, wherein, ​ ​ ​ 18. The battery device of any one of claims 1-17, wherein, The protection plate is provided with a plurality of mounting holes, which are arranged in the second area.

19. The battery device of any one of claims 1-18, wherein, The first fiber resin layer comprises a plurality of first fiber reinforced prepregs stacked with each other, the second fiber resin layer comprises a plurality of second fiber reinforced prepregs stacked with each other, and the reinforcing layer comprises a plurality of third fiber reinforced prepregs stacked with each other.

20. The battery device of claim 19, wherein, The first fiber resin layer, the second fiber resin layer and the reinforcing layer are independently selected from a glass fiber reinforced polyamide resin piece, a glass fiber reinforced polypropylene resin piece, a glass fiber reinforced polyethylene resin piece, a glass fiber reinforced polycarbonate resin piece or a glass fiber reinforced polystyrene resin piece.

21. The battery device of any one of claims 1-20, wherein, The reinforcing layer is a steel plate, and an outer surface of the steel plate is provided with a zinc plating layer, a zinc-iron alloy plating layer or an electrophoretic paint protective layer.

22. An electrical device, comprising: The battery device as claimed in any one of claims 1-21 is used to provide electric energy.

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