Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a box body, a battery monomer and a protection plate, and the battery monomer is arranged in the box body. In the direction of gravity, the protection plate is arranged at the bottom of the battery monomer, the protection plate comprises a first fiber resin layer, an intermediate layer and a second fiber resin layer which are sequentially and layerwisely arranged in a first direction, the intermediate layer comprises a resin frame part and a puncture-proof plate part, the puncture-proof plate part is located in the resin frame part, and the resin frame part is connected between the first fiber resin layer and the second fiber resin layer. The battery device has high reliability.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202420647264.5, filed on April 1, 2024, entitled “Protective Panel, Housing, Battery and Electrical Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology

[0004] 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.

[0005] Improving the reliability of battery devices is a pressing issue in battery technology. Utility Model Content

[0006] 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.

[0007] In a first aspect, this application provides a battery device, which includes a housing, a battery cell, and a protective plate, with the battery cell 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, an intermediate layer, and a second fiber resin layer sequentially stacked along a first direction. The intermediate layer includes a resin frame portion and a puncture-resistant plate portion, with the puncture-resistant plate portion located within the resin frame portion, and the resin frame portion connecting the first fiber resin layer and the second fiber resin layer.

[0008] In the technical solution of this application embodiment, since the intermediate layer includes a puncture-resistant plate portion located between the first fiber resin layer and the second fiber resin layer, the risk of corrosion of the puncture-resistant plate portion can be reduced. When the protective plate is subjected to external force, the puncture-resistant plate portion can improve the protective plate's ability to resist external force, thereby reducing the risk of excessive deformation of the protective plate. At the same time, the resin frame portion can further improve the strength and rigidity of the protective plate, thereby improving the protective plate's ability to resist external impact, which is also beneficial to improving the reliability of the battery device. In the embodiment where the protective plate is connected to the housing through the resin frame portion, the resin frame portion can also improve the connection stability between the protective plate and the housing.

[0009] In one or more embodiments of the first aspect, the puncture-resistant plate portion includes a plurality of spaced sub-plate portions, and the resin frame portion has a partition strip disposed between two adjacent sub-plate portions.

[0010] In the above scheme, the spaced arrangement of multiple sub-plates optimizes the stress distribution of the protective plate and reduces the risk of excessive deformation due to excessive stress at a single point. The spacer strips can serve as assembly references for the sub-plates, which helps improve the assembly efficiency of the protective plate.

[0011] In one or more embodiments of the first aspect, the puncture-resistant plate portion is a flat plate structure.

[0012] In the above scheme, since the puncture-resistant plate is a flat plate structure, the risk of stress concentration in the puncture-resistant plate is low, and the structural stability is high.

[0013] In one or more embodiments of the first aspect, the protective plate is a flat plate structure.

[0014] 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.

[0015] In one or more embodiments of the first aspect, the width of the protective plate is W, and the dimension of the puncture-resistant plate portion in the width direction of the protective plate is w, where 0.6 ≤ w / W < 1.

[0016] In the above scheme, the size of the puncture-resistant plate is set within a reasonable range in the width direction of the protective plate. While the protective plate has high structural strength and a large puncture-resistant area, the weight of the protective plate can also be controlled within a reasonable range, thereby enabling the battery device to have a high energy density.

[0017] In one or more embodiments of the first aspect, the length of the protective plate is L, and the dimension of the puncture-resistant plate portion in the length direction of the protective plate is l, where 0.6 ≤ l / L < 1.

[0018] In the above scheme, the size of the puncture-resistant plate is set within a reasonable range along the length of the protective plate. While the protective plate has high structural strength and a large puncture-resistant area, the weight of the protective plate can also be controlled within a reasonable range, thereby enabling the battery device to have a high energy density.

[0019] In one or more embodiments of the first aspect, the thickness of the resin frame portion is equal to the thickness of the puncture-resistant plate portion.

[0020] In the above solution, since the thickness of the resin frame portion is equal to the thickness of the puncture-resistant plate portion, on the one hand, it facilitates a tighter adhesion between the first and second fiber resin layers and the surface of the intermediate layer, thereby improving the connection strength between the first and second fiber resin layers and the intermediate layer. On the other hand, it reduces the risk of stress concentration between the resin frame portion and the puncture-resistant plate portion.

[0021] In one or more embodiments of the first aspect, the thickness of the second fiber resin layer is greater than the thickness of the first fiber resin layer.

[0022] In the above scheme, since the thickness of the second fiber resin layer is greater than that of the first 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 puncture-resistant plate caused by external force acting on the protective plate through the second fiber resin layer.

[0023] In one or more embodiments of the first aspect, the thickness of the first fiber resin layer is h1, where 0 < h1 ≤ 1.2 mm.

[0024] In the above scheme, the thickness of the first fiber resin layer is set within a reasonable range. The first fiber resin layer has a high ability to resist external impact, reducing the risk of corrosion of the puncture-proof plate, while also enabling the battery device to have a high energy density and a low manufacturing cost.

[0025] In one or more embodiments of the first aspect, the thickness of the second fiber resin layer is h2, where 0 < h2 ≤ 1.2 mm.

[0026] In the above scheme, the thickness of the second fiber resin layer is set within a reasonable range. The second fiber resin layer has a high ability to resist external impact, reducing the risk of corrosion of the puncture-proof plate, while also enabling the battery device to have a high energy density and a low manufacturing cost.

[0027] In one or more embodiments of the first aspect, the thickness of the puncture-resistant plate portion is h3, where 0 < h3 ≤ 1 mm.

[0028] In the above solution, the thickness of the puncture-resistant plate is set within a reasonable range. While the protective plate has a high ability to resist external impacts, the battery device can also have a high energy density and a low manufacturing cost.

[0029] In one or more embodiments of the first aspect, the protective plate further includes an adhesive layer, wherein the first fiber resin layer and the intermediate layer are bonded together by the adhesive layer; and / or, the second fiber resin layer and the intermediate layer are bonded together by the adhesive layer.

[0030] In the above solution, the adhesive layer can improve the connection strength between the intermediate layer and the first fiber resin layer, and reduce the risk of corrosion of the puncture-resistant plate due to the separation of the intermediate layer from the first fiber resin layer and / or the second fiber resin layer.

[0031] In one or more embodiments of the first aspect, the adhesive layer includes a resin film layer.

[0032] In the above scheme, a resin film layer is used as an adhesive layer. On the one hand, it bonds more tightly with the fiber resin layer, and on the other hand, it helps to reduce the weight of the protective plate and improve the energy density of the battery device.

[0033] In one or more embodiments of the first aspect, the thickness of the adhesive layer is h4, where 0 < h4 ≤ 0.5 mm.

[0034] In the above scheme, setting the thickness of the adhesive layer within a reasonable range can provide a strong connection between the fiber resin layer and the intermediate layer, while also enabling the battery device to have a high energy density.

[0035] In one or more embodiments of the first aspect, the area corresponding to the protective plate and the puncture-resistant plate is recessed along the first direction to form a receiving cavity, the bottom surface of the receiving cavity is raised in the opposite direction along the first direction to form a countersunk platform, and the countersunk platform surrounds a countersunk hole for the first fastener to pass through.

[0036] In the above solution, the first fastener is housed within the countersunk hole. On one hand, this reduces the outward protrusion of the first fastener, thus minimizing the risk of it being scratched and improving the connection strength between the protective plate and the housing. On the other hand, it also helps to reduce the size of the battery, thereby enabling the battery device to have a higher energy density.

[0037] In one or more embodiments of the first aspect, the protrusion height of the platform is H, where 0 mm < H ≤ 10 mm.

[0038] In the above scheme, the protrusion height of the sinking platform is set within a reasonable range. On the one hand, it can provide a larger assembly space for the first fastener and reduce the assembly difficulty of the first fastener. On the other hand, it can make the protective plate as a whole have high structural strength.

[0039] In one or more embodiments of the first aspect, 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.

[0040] 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.

[0041] In one or more embodiments of the first aspect, the puncture-resistant plate 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.

[0042] 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.

[0043] In one or more embodiments of the first aspect, the first fiber resin layer and the second fiber resin 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.

[0044] 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.

[0045] 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.

[0046] 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 other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0047] 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:

[0048] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0049] Figure 2 This application provides schematic diagrams of the battery structure for some embodiments.

[0050] Figure 3 An exploded view of a protective plate provided in some embodiments of this application;

[0051] Figure 4 for Figure 3 A schematic diagram of the intermediate layer shown;

[0052] Figure 5 for Figure 3The diagram shows the structure of the protective plate.

[0053] Figure 6 For along Figure 5 Sectional view of line AA in the middle;

[0054] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0055] Figure 8 for Figure 7 A magnified view of a section at point C;

[0056] Figure 9 This is a schematic diagram of the structure of the box provided in some embodiments of this application;

[0057] Figure 10 For along Figure 9 Sectional view of the DD line;

[0058] Figure 11 for Figure 10 A magnified view of a section at point E in the middle.

[0059] The reference numerals in the detailed embodiments are as follows:

[0060] 1000 - Vehicle; 1100 - Battery unit; 1200 - Controller; 1300 - Motor; 100 - Protective plate; 1001 - Receiving cavity; 110 - First fiber resin layer; 120 - Intermediate layer; 121 - Resin frame; 1211 - Separator; 122 - Puncture-resistant plate; 1221 - Subplate; 130 - Second fiber resin layer; 140 - Adhesive layer; 150 - Countersunk platform; 151 - Countersunk hole; 200 - Main body of the box; 300 - Intermediate beam; 410 - First fastener; 420 - Second fastener; 500 - Seal; 10 - Box body; 11 - First part; 12 - Second part; 20 - Battery cell; 30 - Heat exchange plate; 31 - Flow channel; 32 - Surface protrusion. Detailed Implementation

[0061] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0063] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0064] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0065] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.

[0070] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0071] In some implementations, the electrode assembly is a stacked structure.

[0072] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0080] 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.

[0081] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0082] The following discussion will primarily focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable in some respects to cylindrical battery cells, pouch cell cells, or blade cell cells.

[0083] The development of battery technology must take into account multiple design factors, such as reliability, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, the reliability of the battery device also needs to be considered.

[0084] A typical battery assembly generally consists of a housing and a protective plate. The protective plate is located at the bottom of the housing. To improve the protective plate's ability to withstand impacts to the bottom of the battery assembly, it usually includes a puncture-resistant section. Further to reduce the risk of corrosion of the puncture-resistant section, it is wrapped with two corrosion-resistant layers. These two layers and the puncture-resistant section are then machined together and connected to the housing to complete the assembly of the protective plate. To maintain high structural stability of the puncture-resistant section, the connection area between the puncture-resistant section and the housing generally avoids the area where the puncture-resistant section is located. That is, the portion of the protective plate within the connection area typically consists of only two corrosion-resistant layers. This results in lower connection stability between the housing and the protective plate, leading to poorer reliability of the battery assembly.

[0085] In view of this, this application provides a battery device, which includes a housing, battery cells, and a protective plate, with the battery cells 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, an intermediate layer, and a second fiber resin layer sequentially stacked along a first direction. The intermediate layer includes a resin frame portion and a puncture-resistant plate portion, with the puncture-resistant plate portion located within the resin frame portion and connected between the first and second fiber resin layers. Because the intermediate layer includes the puncture-resistant plate portion and the puncture-resistant plate portion is located between the first and second fiber resin layers, the risk of corrosion of the puncture-resistant plate portion can be reduced. When the protective plate is subjected to external force, the puncture-resistant plate portion can improve the protective plate's ability to resist external force, thereby reducing the risk of excessive deformation of the protective plate. Simultaneously, the resin frame portion can further improve the strength and rigidity of the protective plate, thereby improving the protective plate's ability to resist external impact and also contributing to improved reliability of the battery device. In embodiments where the protective plate is connected to the housing via the resin frame portion, the resin frame portion can also improve the connection stability between the protective plate and the housing.

[0086] The technical solutions described in the embodiments of this application are applicable to battery cells, battery devices, and electrical devices using battery devices.

[0087] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, among others. 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. Electrical devices can also be energy storage devices, such as energy storage cabinets and energy storage containers.

[0088] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0089] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments 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 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0090] In some embodiments of this application, the battery device 1100 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.

[0091] Please refer to Figure 2 The battery device 1100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10. The housing 10 provides space for the battery cells 20 and can have various structures.

[0092] In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, and together define a receiving 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, with the first portion 11 covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 together define the receiving space; alternatively, the first portion 11 and the second portion 12 may both 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. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0093] In the battery device 1100, there can be multiple battery cells 20. Multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. A mixed manner means that multiple battery cells 20 are connected in both series and parallel.

[0094] In one embodiment, multiple battery cells 20 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 1100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a hybrid configuration to form a battery module, and then multiple battery modules connected in series, parallel, or in a hybrid configuration to form a whole, which is then housed within the housing 10. The battery device 1100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0095] In this application, the battery cell 20 may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, lithium metal batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell 20 may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. The battery cell 20 is generally divided into three types according to the packaging method: cylindrical battery cell 20, square battery cell 20, and pouch battery cell 20.

[0096] See Figures 3 to 8 The diagram illustrates a schematic representation of the protective plate 100 provided in an embodiment of this application. In the following exemplary embodiments, the protective plate 100 provided in this application is described using a battery device 1100 applied to an electrical device as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the following embodiments to apply the design of the protective plate 100 provided in this application to other applications, and these changes are still within the principle scope of the electrical device provided in the embodiments of this application.

[0097] According to some embodiments of this application, please refer to Figures 3-8 This application provides a battery device 1100, which includes a housing 10, a battery cell 20, and a protective plate 100. The battery cell 20 is disposed inside the housing 10. Along the direction of gravity, the protective plate 100 is disposed at the bottom of the battery cell 20. The protective plate 100 includes a first fiber resin layer 110, an intermediate layer 120, and a second fiber resin layer 130 stacked sequentially along a first direction. The intermediate layer 120 includes a resin frame portion 121 and a puncture-resistant plate portion 122. The puncture-resistant plate portion 122 is located inside the resin frame portion 121, and the resin frame portion 121 is connected between the first fiber resin layer 110 and the second fiber resin layer 130.

[0098] The first fiber resin layer 110 can also be referred to as the first fiber resin layer, and the second fiber resin layer 130 can also be referred to as the second fiber resin layer.

[0099] In some embodiments, the protective plate 100 may refer to a component used to protect the battery cells 20 within the battery device 1100.

[0100] In some embodiments, the protective plate 100 may be used to support the battery cell 20. In other embodiments, the battery device 1100 further includes a heat exchange plate 30 disposed between the protective plate 100 and the battery cell 20, the heat exchange plate 30 being used to support the battery cell 20.

[0101] The first direction can refer to the thickness direction of the protective plate 100. (See also...) Figure 3 As shown, the protective plate 100 has a thickness direction, a length direction and a width direction. The thickness direction of the protective plate 100 can be referred to as the Z direction in the figure, the width direction of the protective plate 100 can be referred to as the Y direction in the figure, and the length direction of the protective plate 100 can be referred to as the X direction in the figure.

[0102] The intermediate layer 120 can refer to a layer located between the first fiber resin layer 110 and the second fiber resin layer 130. The intermediate layer 120 plays a major protective role, preventing external foreign objects from piercing the protective plate 100. In other words, when the protective plate 100 is pierced by a foreign object, the intermediate layer 120 can reduce the risk of the foreign object piercing the protective plate 100 and damaging the battery cell 20.

[0103] The intermediate layer 120 includes a resin frame portion 121 and a puncture-resistant plate portion 122. The puncture-resistant plate portion 122 may refer to the portion of the intermediate layer 120 located in the middle, and the resin frame portion 121 may be annular and surrounding the puncture-resistant plate portion 122. In some embodiments, the resin frame portion 121 may refer to the portion of the intermediate layer 120 located at the edge. The shape of the resin frame portion 121 may include, but is not limited to, a square, a U-shape, a sun-shaped shape, a grid shape, etc.

[0104] In some embodiments, the area connecting the housing 10 and the protective panel 100 is located within the resin frame portion 121. For example, in the case of a fastener connection, the fastener passes sequentially through the second fiber resin layer 130, the resin frame portion 121, and the first fiber resin layer 110 before being connected to the housing 10. In the case of a welding or heat-fusion connection, at least a portion of the projection of the weld mark formed by the welding or heat-fusion connection is located within the resin frame portion 121 along the first direction.

[0105] In some embodiments, the first fiber resin layer 110, the resin frame portion 121, and the second fiber resin layer 130 can be connected by structural adhesive.

[0106] In some embodiments, the first fiber resin layer 110, the resin frame portion 121, and the second fiber resin layer 130 can be bonded together by the adhesiveness of their resin portions and the partial adhesiveness of the resin frame portion 121.

[0107] In some embodiments, the provision of the first fiber resin layer 110 and the second fiber resin layer 130 can enable the protective plate 100 to have strong fire resistance, for example, a fiber resin composite material including fibers such as carbon fiber, aramid fiber or glass fiber.

[0108] In some embodiments, the protective plate 100 can be connected to the housing 10 by fasteners that pass through the first fiber resin layer 110, the second fiber resin layer 130 and the resin frame portion 121. Since the fasteners pass through the resin frame portion 121, the risk of fastener failure is low and the connection stability between the protective plate 100 and the housing 10 is high.

[0109] In some embodiments, the first fiber resin layer 110, the second fiber resin layer 130, and the resin frame portion 121 can be connected in various ways, such as riveting, resin adhesive bonding, gluing, laser welding, hot pressing, etc. Due to the provision of the resin frame portion 121, compared with embodiments without the resin frame portion 121, the connection strength between the protective plate 100 and the housing 10 is improved without interfering with the puncture-resistant components.

[0110] In some embodiments, the provision of the first fiber resin layer 110 or the second fiber resin layer 130 can serve to prevent corrosion of the intermediate layer 120.

[0111] The material of the resin frame 121 may include thermosetting resins, such as epoxy resin, phenolic resin, urea-formaldehyde resin, melamine resin, unsaturated polyester resin, silicone resin, polyurethane, etc. It may also include thermoplastic resins, such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc. Of course, the material of the resin frame 121 may also include, but is not limited to, polyamide, polyoxymethylene, polycarbonate, polyphenylene ether, polysulfone, rubber, etc.

[0112] In the technical solution of this application embodiment, since the intermediate layer 120 includes a puncture-resistant plate portion 122 and the puncture-resistant plate portion 122 is located between the first fiber resin layer 110 and the second fiber resin layer 130, the risk of corrosion of the puncture-resistant plate portion 122 can be reduced. When the protective plate 100 is subjected to external force, the puncture-resistant plate portion 122 can improve the protective plate 100's ability to resist external force, thereby reducing the risk of excessive deformation of the protective plate 100. At the same time, the resin frame portion 121 can further improve the strength and rigidity of the protective plate 100, thereby improving the protective plate 100's ability to resist external impact, which is also beneficial to improving the reliability of the battery device 1100. In the embodiment where the protective plate 100 is connected to the housing 10 through the resin frame portion 121, the provision of the resin frame portion 121 can also improve the connection stability between the protective plate 100 and the housing 10.

[0113] According to some embodiments of this application, please refer to Figures 3-8 The puncture-resistant plate portion 122 includes a plurality of spaced sub-plate portions 1221, and the resin frame portion 121 has a separator strip 1211, which is disposed between two adjacent sub-plate portions 1221.

[0114] The partition strip 1211 is part of the resin frame 121 and is also made of resin material. The partition strip 1211 divides the resin frame 121 into multiple regions, and multiple sub-plates 1221 are installed in each region in a corresponding manner, so that the partition strip 1211 separates two adjacent sub-plates 1221. The number of sub-plates 1221 may be, but is not limited to, two, three, or four.

[0115] For example, there are two sub-plate portions 1221, which are arranged at intervals along the length of the protective plate 100. Of course, in other embodiments, the multiple sub-plate portions 1221 can be arranged in a matrix or at intervals along the width of the protective plate 100, which can be designed according to actual design needs.

[0116] In the above scheme, the spaced arrangement of multiple sub-plates 1221 can optimize the stress distribution of the protective plate 100 and reduce the risk of excessive deformation of the protective plate 100 under single-point stress. The partition strip 1211 can serve as an assembly reference for the sub-plates 1221, which is beneficial to improving the assembly efficiency of the protective plate 100.

[0117] According to some embodiments of this application, the puncture-resistant plate portion 122 is a flat plate structure.

[0118] The puncture-resistant plate portion 122 has a flat plate structure, which means that, along the first direction, the two opposite surfaces of the puncture-resistant plate portion 122 are planar.

[0119] In the above scheme, since the puncture-resistant plate 122 is a flat plate structure, the risk of stress concentration in the puncture-resistant plate 122 is low, and the structural stability is high.

[0120] According to some embodiments of this application, the protective plate 100 has a flat plate structure.

[0121] The protective plate 100 has a flat plate structure, meaning that along the first direction, the two opposite surfaces of the protective plate 100 are planar. In some embodiments, both the first fiber resin layer 110 and the second fiber resin layer 130 have a flat plate structure.

[0122] In the above solution, since the protective plate 100 is a flat plate structure, on the one hand, it can be processed into a flat plate shape through extrusion molding, which is beneficial to improving the production efficiency of the protective plate 100. On the other hand, it can reduce the assembly difficulty between the box body 10 and the protective plate 100. Furthermore, it also helps to reduce the risk of seal failure between the box body 10 and the protective plate 100.

[0123] According to some embodiments of this application, please refer to Figure 4 The width of the protective plate 100 is W, and the dimension of the puncture-resistant plate portion 122 in the width direction of the protective plate 100 is w, where 0.6 ≤ w / W < 1.

[0124] The width W of the protective plate 100 can refer to the distance between two opposite surfaces of the protective plate 100 along the width direction.

[0125] In the width direction of the protective plate 100, the dimension w of the puncture-resistant plate portion 122 can refer to the distance between two opposing surfaces of the puncture-resistant plate portion 122 along the width direction of the protective plate 100.

[0126] 0.6≤w / W<1 means that when w / W<1, the resin frame portion 121 occupies a certain space in the width direction of the protective plate 100 to connect the first fiber resin layer 110 and the second fiber resin layer 130; when w / W≥0.6, the resin frame portion 121 occupies a smaller space in the width direction of the protective plate 100, while the puncture-resistant plate portion 122 occupies a larger space, which can provide better protection for the battery cell 20, and the protective effect of the protective plate 100 is good.

[0127] In some embodiments, the w / W value can be 0.6 or any number between 0.6 and 1; for example, the w / W value can be, but is not limited to, 0.6, 0.62, 0.64, 0.66, 0.68, 0.7, 0.72, 0.74, 0.76, 0.78, 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, 0.98, and 0.99.

[0128] In the above solution, the size of the puncture-resistant plate portion 122 is set within a reasonable range in the width direction of the protective plate 100. While the protective plate 100 has high structural strength and a large puncture-resistant area, the weight of the protective plate 100 can also be controlled within a reasonable range, thereby enabling the battery device 1100 to have a high energy density.

[0129] According to some embodiments of this application, please refer to Figure 4 The length of the protective plate 100 is L, and the dimension of the puncture-resistant plate portion 122 in the length direction of the protective plate 100 is l, where 0.6 ≤ l / L < 1.

[0130] The length L of the protective plate 100 can refer to the distance between two opposing surfaces of the protective plate 100 along its length.

[0131] In the longitudinal direction of the protective plate 100, the dimension l of the puncture-resistant plate portion 122 may refer to the distance between two opposing surfaces of the puncture-resistant plate portion 122 along the longitudinal direction of the protective plate 100.

[0132] 0.6≤l / L<1, which means that when l / L<1, the resin frame portion 121 occupies a certain space in the length direction of the protective plate 100 to connect the first fiber resin layer 110 and the second fiber resin layer 130; when l / L≥0.6, the resin frame portion 121 occupies a smaller space in the length direction of the protective plate 100, while the puncture-resistant plate portion 122 occupies a larger space, which can provide better protection for the battery cell 20, and the protective effect of the protective plate 100 is good.

[0133] In some embodiments, the value of l / L can be 0.6 or any number between 0.6 and 1; for example, the value of l / L can be, but is not limited to, 0.6, 0.62, 0.64, 0.66, 0.68, 0.7, 0.72, 0.74, 0.76, 0.78, 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96, 0.98, and 0.99.

[0134] In the above solution, the size of the puncture-resistant plate portion 122 is set within a reasonable range along the length of the protective plate 100. While the protective plate 100 has high structural strength and a large puncture-resistant area, the weight of the protective plate 100 can also be controlled within a reasonable range, thereby enabling the battery device 1100 to have a high energy density.

[0135] According to some embodiments of this application, please refer to Figures 5-8 The thickness of the resin frame portion 121 is equal to the thickness of the puncture-resistant plate portion 122.

[0136] The thickness h5 of the resin frame portion 121 can refer to the distance between two opposing surfaces of the resin frame portion 121 along the first direction.

[0137] The thickness h3 of the puncture-resistant plate portion 122 can refer to the distance between two opposing surfaces of the puncture-resistant plate portion 122 along the first direction.

[0138] In the above solution, since the thickness of the resin frame portion 121 is equal to the thickness of the puncture-resistant plate portion 122, on the one hand, it facilitates a tighter fit between the first fiber resin layer 110 and the second fiber resin layer 130 and the surface of the intermediate layer 120, thereby improving the connection strength between the first fiber resin layer 110, the second fiber resin layer 130 and the intermediate layer 120. On the other hand, it reduces the risk of stress concentration between the resin frame portion 121 and the puncture-resistant plate portion 122.

[0139] According to some embodiments of this application, please refer to Figure 8 The thickness of the second fiber resin layer 130 is greater than the thickness of the first fiber resin layer 110.

[0140] The thickness h1 of the first fiber resin layer 110 can refer to the distance between two opposing surfaces of the first fiber resin layer 110 along the first direction.

[0141] The thickness h2 of the second fiber resin layer 130 can refer to the distance between two opposing surfaces of the second fiber resin layer 130 along the first direction.

[0142] In the above scheme, since the thickness of the second fiber resin layer 130 is greater than that of the first fiber resin layer 110, the second fiber resin layer 130 has higher structural strength, which can reduce the risk of excessive deformation of the protective plate 100 and corrosion of the puncture-resistant plate portion 122 caused by external force acting on the protective plate 100 by the second fiber resin layer 130.

[0143] According to some embodiments of this application, please refer to Figure 8 The thickness of the first fiber resin layer 110 is h1, where 0 < h1 ≤ 1.2 mm.

[0144] 0 < h1 ≤ 1.2 mm. It can be understood that h1 > 0, so that the first fiber resin layer 110 has a certain thickness, which can protect the puncture-resistant plate portion 122; h1 ≤ 1.2 mm, so that the thickness of the first fiber resin layer 110 is not too thick, which is conducive to reducing the manufacturing cost of the protective plate 100, and can also reduce the space occupied by the protective plate 100 on the battery device 1100, which is conducive to reducing the size of the battery device 1100.

[0145] In some embodiments, the value of h1 can be 1.2 mm or any number between 0 and 1.2 mm; for example, the value of h1 can be, but is not limited to, 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, or 1.2 mm.

[0146] In the above scheme, the thickness of the first fiber resin layer 110 is set within a reasonable range. The first fiber resin layer 110 has a high ability to resist external impact, reducing the risk of corrosion of the puncture-proof plate 122, while also enabling the battery device 1100 to have a high energy density and a low manufacturing cost.

[0147] According to some embodiments of this application, please refer to Figure 8 The thickness of the second fiber resin layer 130 is h2, where 0 < h2 ≤ 1.2 mm.

[0148] 0 < h2 ≤ 1.2 mm. It can be understood that h2 > 0, so that the second fiber resin layer 130 has a certain thickness, which can protect the puncture-resistant plate portion 122; h2 ≤ 1.2 mm, so that the thickness of the second fiber resin layer 130 is not too thick, which is beneficial to reducing the manufacturing cost of the protective plate 100, and can also reduce the space occupied by the protective plate 100 on the battery device 1100, which is beneficial to reducing the size of the battery device 1100.

[0149] In some embodiments, the value of h2 can be 1.2 mm and any number between 0 and 1.2 mm; for example, the value of h2 can be, but is not limited to, 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, and 1.2 mm.

[0150] In the above scheme, the thickness of the second fiber resin layer 130 is set within a reasonable range. The second fiber resin layer 130 has a high ability to resist external impact, reducing the risk of corrosion of the puncture-proof plate 122, while also enabling the battery device 1100 to have a high energy density and a low manufacturing cost.

[0151] According to some embodiments of this application, please refer to Figure 8 The thickness of the puncture-resistant plate 122 is h3, where 0 < h3 ≤ 1 mm.

[0152] 0 < h3 ≤ 1 mm. It can be understood that h3 > 0, so that the puncture-resistant plate 122 has a certain thickness, which can play a role in preventing puncture; h3 ≤ 1 mm, so that the thickness of the puncture-resistant plate 122 is not too thick, which helps to reduce the manufacturing cost of the protective plate 100.

[0153] In some embodiments, the value of h3 can be 1 mm or any number between 0 and 1 mm; for example, the value of h3 can be, but is not limited to, 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, or 1 mm.

[0154] In the above solution, the thickness of the puncture-resistant plate 122 is set within a reasonable range. While the protective plate 100 has a high ability to resist external impact, the battery device 1100 also has a high energy density and a low manufacturing cost.

[0155] According to some embodiments of this application, please refer to Figure 8 The protective panel 100 also includes an adhesive layer 140, through which the first fiber resin layer 110 and the intermediate layer 120 are bonded; and / or, through which the second fiber resin layer 130 and the intermediate layer 120 are bonded.

[0156] The adhesive layer 140 can refer to a layered material capable of bonding two components. It can be a layered structure formed after the adhesive applied between the two components has cured, or it can be a layered component with adhesive properties on both sides, such as double-sided tape. Of course, it can also refer to other structures.

[0157] In the above solution, the adhesive layer 140 can improve the connection strength between the intermediate layer 120 and the first fiber resin layer 110, and reduce the risk of corrosion of the puncture-resistant plate portion 122 caused by the separation of the intermediate layer 120 from the first fiber resin layer 110 and / or the second fiber resin layer 130.

[0158] According to some embodiments of this application, please refer to Figure 8 The adhesive layer 140 includes a resin film layer.

[0159] The adhesive layer 140 adopts a resin film structure. A resin film can refer to a material used for bonding. Its principle is to form a uniform and durable adhesive surface on the surface of the resin film through the properties of the resin, thereby achieving the bonding effect. Examples include double-sided tape, hot melt adhesive film, and epoxy resin film.

[0160] In the above scheme, a resin film layer is used as the adhesive layer 140. On the one hand, it is more tightly bonded to the fiber resin layer, and on the other hand, it helps to reduce the weight of the protective plate 100 and improve the energy density of the battery device 1100.

[0161] According to some embodiments of this application, please refer to Figure 8 The thickness of the adhesive layer 140 is h4, where 0 < h4 ≤ 0.5 mm.

[0162] The thickness h4 of the adhesive layer 140 can refer to the distance between the two surfaces of the adhesive layer 140 that are positioned opposite each other in the first direction. 0 < h4 ≤ 0.5 mm. This means that h4 > 0 ensures the adhesive layer 140 has a certain thickness to achieve bonding; h4 ≤ 0.5 mm prevents the adhesive layer 140 from becoming too thick, ensuring good bonding ability. This helps reduce the risk of delamination of the protective plate 100 and material waste, thus reducing manufacturing costs.

[0163] In some embodiments, the value of h4 can be 0, 0.5 mm, or any number between 0 and 0.5 mm; for example, the value of h4 can be, but is not limited to, 0.01 mm, 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0164] In the above scheme, the thickness of the adhesive layer is set within a reasonable range, which can provide a strong connection between the fiber resin layer and the intermediate layer 120, while also enabling the battery device 1100 to have a high energy density.

[0165] According to some embodiments of this application, please refer to Figures 9-11 The area corresponding to the protective plate 100 and the puncture-resistant plate portion 122 is recessed along the first direction to form a receiving cavity 1001. The bottom surface of the receiving cavity 1001 protrudes in the opposite direction along the first direction to form a countersunk platform 150. The countersunk platform 150 surrounds a countersunk hole 151 for the first fastener 410 to pass through.

[0166] The area corresponding to the protective plate 100 and the puncture-resistant plate portion 122 is recessed along the first direction to form a receiving cavity 1001. It can be understood that the middle area of ​​the protective plate 100 may be recessed, that is, the protective plate 100 may be a basin-shaped structure to form the receiving cavity 1001; or the puncture-resistant plate portion 122 may be a flat plate structure, and the inner side of the resin frame portion 121 may be stretched to form a basin-shaped structure with a bottom opening. The puncture-resistant plate portion 122 is located on the bottom wall of the receiving cavity 1001, thereby providing protection for the components inside the receiving cavity 1001 and the components located on the side of the receiving cavity 1001.

[0167] When the protective plate 100 is installed on the battery device 1100, the bottom surface of the receiving cavity 1001 has a protrusion that protrudes from the bottom surface of the receiving cavity 1001. This protrusion is the countersunk plate 150. A recessed area is formed on the surface of the protective plate 100 facing away from the receiving cavity 1001. This recessed area is the countersunk hole 151, which can penetrate the bottom surface of the receiving cavity 1001. In this way, the first fastener 410 can pass through the countersunk hole 151 from the outside of the battery device 1100, through the protective plate 100 and the heat exchange plate 30, and thus connect with the intermediate beam 300, expansion beam and other components inside the housing 10, thereby improving the installation reliability of the protective plate 100. The countersunk plate 150 can penetrate the area of ​​the resin frame portion 121 used to form the bottom wall of the receiving cavity 1001, and can also penetrate the puncture-resistant plate portion 122. The first fastener 410 can refer to bolts, screws, etc.

[0168] In the above solution, the first fastener 410 is housed within the countersunk hole 151. On the one hand, this reduces the outward protrusion of the first fastener 410, which helps to reduce the risk of the first fastener 410 being scratched, thereby improving the connection strength between the protective plate 100 and the housing 10. On the other hand, it also helps to reduce the size of the battery, thereby enabling the battery device 1100 to have a higher energy density.

[0169] According to some embodiments of this application, please refer to Figures 9-11 The protrusion height of the 150-degree platform is H, where 0mm < H ≤ 10mm.

[0170] The protrusion height H of the recessed platform 150 can refer to the distance between the surface of the recessed platform 150 facing away from the bottom surface of the receiving cavity 1001 and the bottom surface of the receiving cavity 1001.

[0171] 0mm<H≤10mm, which means that H>0, the recessed platform 150 has a certain protrusion height, and a recessed countersunk hole 151 will be formed on the other side of the protective plate 100 to accommodate the first fastener 410, which helps to reduce the outward protrusion height of the first fastener 410; H≤10mm, the protrusion height H of the recessed platform 150 will not be too large, which would reduce the risk of the overall structural strength of the protective plate 100 being too low.

[0172] In some embodiments, the value of H can be 10 mm or any number between 0 and 10 mm; for example, the value of H can be, but is not limited to, 0.1 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0173] In the above scheme, the protrusion height of the recessed platform 150 is set within a reasonable range. On the one hand, it can provide a larger assembly space for the first fastener 410 and reduce the assembly difficulty of the first fastener 410. On the other hand, it can make the protective plate 100 as a whole have high structural strength.

[0174] According to some embodiments of this application, the first fiber resin layer 110 includes multiple layers of first fiber-reinforced prepreg; the second fiber resin layer 130 includes multiple layers of second fiber-reinforced prepreg.

[0175] The fibers in each layer of the first fiber-reinforced prepreg are arranged in a unidirectional direction. The fiber directions 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 directions of adjacent layers of the first fiber-reinforced prepreg at approximately 90°, it is beneficial to improve the uniformity of stress on the first fiber resin layer 110 in all directions.

[0176] In another embodiment, the fibers in the first fiber-reinforced prepreg are interwoven to form a woven fabric.

[0177] The fiber arrangement of the second fiber-reinforced prepreg is similar to that of the first fiber-reinforced prepreg, and will not be described again.

[0178] In the above scheme, while improving the strength and stiffness of the protective plate 100, the multi-layer structure helps to disperse stress and reduce stress concentration, thereby improving the fatigue resistance of the material.

[0179] According to some embodiments of this application, the puncture-resistant plate 122 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.

[0180] 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.

[0181] According to some embodiments of this application, the first fiber resin layer 110 and the second fiber resin layer 130 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.

[0182] According to some embodiments of this application, please refer to Figure 1 This application provides an electrical device that includes the battery device 1100 in one or more of the above embodiments, the battery device 1100 being used to provide electrical energy.

[0183] In the above solutions, since the battery device 1100 in one or more of the above embodiments has high reliability, the power-consuming device including the battery device 1100 in one or more of the above embodiments also has high reliability.

[0184] According to some embodiments of this application, please refer to Figures 3-8 This application provides a battery device 1100, which includes a housing 10, a battery cell 20, and a protective plate 100. The battery cell 20 is disposed within the housing 10. Along the direction of gravity, the protective plate 100 is disposed at the bottom of the battery cell 20. The protective plate 100 includes a first fiber resin layer 110, an intermediate layer 120, and a second fiber resin layer 130 stacked sequentially along a first direction. The intermediate layer 120 includes a resin frame portion 121 and a puncture-resistant plate portion 122. The puncture-resistant plate portion 122 is located within the resin frame portion 121, and the resin frame portion 121 connects the first fiber resin layer 110 and the second fiber resin layer 130. The puncture-resistant plate portion 122 includes a plurality of spaced-apart sub-plate portions 1221. A separator strip 1211 is provided within each resin frame portion 121, and the separator strip 1211 is disposed between two adjacent sub-plate portions 1221. The puncture-resistant plate portion 122 has a flat plate structure. The thickness of the resin frame portion 121 is equal to the thickness of the puncture-resistant plate portion 122. The thickness of the second fiber resin layer 130 is greater than the thickness of the first fiber resin layer 110. The area of ​​the protective plate 100 corresponding to the puncture-resistant plate portion 122 is recessed along the first direction to form a receiving cavity 1001. The bottom surface of the receiving cavity 1001 protrudes in the opposite direction of the first direction to form a countersunk platform 150. The countersunk platform 150 surrounds a countersunk hole 151 for the first fastener 410 to pass through.

[0185] A heat exchange plate 30 is also provided between the battery cell 20 and the protective plate 100. The heat exchange plate 30 can refer to a component that exchanges heat with the battery cell 20. The heat exchange plate 30 has a flow channel 31, and the heat exchange medium flows in the heat exchange plate 30, thereby realizing heat exchange of the battery device 1100. The heat exchange medium can heat or cool the battery cell 20, and its specific design can be made according to the needs. The heat exchange medium can be, but is not limited to, water, air, refrigerant, etc. The heat exchange plate 30 includes two plates, and at least one plate has a surface recess that connects with the other plate to form the flow channel 31. The protrusion formed by the flow channel 31 on the surface of the heat exchange plate 30 is the surface protrusion 32. The battery cell 20 is located inside the main body 200. The heat exchange plate 30 covers the opening of the main body 200. The protective plate 100 is installed on the side of the heat exchange plate 30 facing away from the battery cell 20 to protect the battery cell 20 and the heat exchange plate 30. The second fastener 420 passes through the periphery of the protective plate 100 and the periphery of the heat exchange plate 30 and is connected to the main body 200. A sealing element 500 is also sandwiched between the periphery of the protective plate 100 and the periphery of the heat exchange plate 30 to achieve sealing of the main body 10. The second fastener 420 can be, but is not limited to, screws, bolts, etc.; the sealing element 500 can be, but is not limited to, sealant, sealing ring, etc. The protective plate 100 can be located at the top or bottom of the battery device 1100.

[0186] 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 by, include: Box; A battery cell, wherein the battery cell is disposed within the housing; A protective plate is disposed at the bottom of the battery cell along the direction of gravity. The protective plate includes a first fiber resin layer, an intermediate layer and a second fiber resin layer stacked sequentially along a first direction. The intermediate layer includes a resin frame portion and a puncture-resistant plate portion. The puncture-resistant plate portion is located inside the resin frame portion and the resin frame portion is connected between the first fiber resin layer and the second fiber resin layer.

2. The battery device according to claim 1, characterized by The puncture-resistant plate includes multiple spaced sub-plates, and the resin frame has a separator strip located between two adjacent sub-plates.

3. The battery device of claim 1, wherein The puncture-resistant plate is a flat plate structure.

4. The battery device of claim 1, wherein The protective plate has a flat plate structure.

5. The battery device of claim 1, wherein The width of the protective plate is W, and the dimension of the puncture-resistant plate portion in the width direction of the protective plate is w, where 0.6 ≤ w / W < 1.

6. The battery device according to claim 1, characterized in that, The length of the protective plate is L, and the dimension of the puncture-resistant plate portion is l along the length of the protective plate, where 0.6 ≤ l / L < 1.

7. The battery device according to claim 1, characterized in that, The thickness of the resin frame portion is equal to the thickness of the puncture-resistant plate portion.

8. The battery device according to claim 1, characterized in that, The thickness of the second fiber resin layer is greater than the thickness of the first fiber resin layer.

9. The battery device according to claim 1, characterized in that, The thickness of the first fiber resin layer is h1, where 0 < h1 ≤ 1.2 mm.

10. The battery device according to claim 1, characterized in that, The thickness of the second fiber resin layer is h2, where 0 < h2 ≤ 1.2 mm.

11. The battery device according to claim 1, characterized in that, The thickness of the puncture-resistant plate is h3, where 0 < h3 ≤ 1 mm.

12. The battery device according to claim 1, characterized in that, The protective panel further includes an adhesive layer, wherein the first fiber resin layer and the intermediate layer are bonded together by the adhesive layer; and / or, the second fiber resin layer and the intermediate layer are bonded together by the adhesive layer.

13. The battery device according to claim 12, characterized in that, The adhesive layer includes a resin film layer.

14. The battery device according to claim 12, characterized in that, The thickness of the adhesive layer is h4, where 0 < h4 ≤ 0.5 mm.

15. The battery device according to any one of claims 1-14, characterized in that, The area corresponding to the protective plate and the puncture-resistant plate is recessed along the first direction to form a receiving cavity. The bottom surface of the receiving cavity protrudes in the opposite direction of the first direction to form a countersunk platform. The countersunk platform surrounds a countersunk hole for the first fastener to pass through.

16. The battery device according to claim 15, characterized in that, The protrusion height of the platform is H, where 0mm < H ≤ 10mm.

17. The battery device according to claim 1, 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.

18. The battery device according to claim 1, characterized in that, The puncture-resistant plate is made of 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.

19. The battery device according to claim 1, characterized in that, The first fiber resin layer and the second fiber resin 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.

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.

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