Battery device and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises: a box body comprising a first box body, the first box body comprising a frame and a bottom plate connected to the frame, and the frame and the bottom plate are both made of a composite material; a battery monomer is accommodated in an accommodation space; a reinforcing plate is connected to the bottom plate, and the reinforcing plate comprises a first structure layer and a second structure layer; the strength of the first structure layer is greater than the strength of the second structure layer. In the battery device provided by the application, the bottom plate of the box body is directly exposed to the external environment, that is, a bottom guard plate is no longer arranged at the bottom of the box body, so that the height of the battery device can be reduced, and the space occupation and weight of the battery device can be reduced. Meanwhile, the reinforcing plate is arranged on the bottom plate of the box body, and the reinforcing plate comprises the first structure layer and the second structure layer, so that the strength of the bottom of the box body is improved through the reinforcing plate, and the protection performance of the bottom of the box body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] 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 environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The current battery device is usually installed at the bottom of the vehicle. During the driving of the vehicle, the bottom of the battery device is easily collided by road bumps, flying stones and other sundries, thereby easily causing the battery monomer inside the battery device to be damaged. Moreover, the weight of the current battery device is usually heavy. SUMMARY

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which can alleviate the problem that the current battery device is difficult to balance the bottom protection and weight reduction.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising:

[0006] The box body comprises a first box body, the first box body comprises a frame and a bottom plate connected to the frame, the materials of the frame and the bottom plate both comprise a composite material, and the frame and the bottom plate enclose a containing space with an open end; the battery monomer is contained in the containing space; the reinforcing plate is connected to the bottom plate, the reinforcing plate comprises a first structure layer and a second structure layer, the first structure layer is connected to one side of the bottom plate facing the containing space, the second structure layer is connected to one side of the first structure layer away from the bottom plate, and the battery monomer is connected to the second structure layer; and the strength of the first structure layer is greater than the strength of the second structure layer.

[0007] In the technical solution of the embodiment, the reinforcing plate is arranged on the bottom plate of the box body, and the reinforcing plate comprises the first structure layer and the second structure layer, so as to improve the strength of the bottom of the box body through the reinforcing plate, thereby improving the protection performance of the bottom of the box body; the materials of the frame and the bottom plate both comprise a composite material, so that the first box body can not only provide support for the battery monomer, but also provide protection for the battery monomer, and at the same time, the weight of the first box body is relatively light, so as to reduce the negative impact of the first box body on the overall weight of the battery device.

[0008] In some embodiments, one side of the bottom plate away from the containing space is directly exposed to the external environment.

[0009] In the technical solution of the embodiment, the bottom plate of the box body is directly exposed to the external environment, that is, the bottom guard plate is no longer arranged at the bottom of the box body, thereby reducing the height of the battery device and reducing the space occupation and weight of the battery device.

[0010] In some embodiments, the reinforcing plate further comprises a third structure layer, which is arranged between the first structure layer and the second structure layer.

[0011] In the technical scheme of the embodiment, the reinforcing plate is a three-layer structure, so that the reinforcing plate can better protect the bottom of the battery device.

[0012] In some embodiments, the material of the first structure layer comprises metal.

[0013] In the technical scheme of the embodiment, the material of the first structure layer comprises metal, so that the first structure layer can have high strength to better protect the bottom of the battery device; at the same time, the risk of external sundries piercing the reinforcing plate can be reduced, thereby better protecting the battery monomer.

[0014] In some embodiments, the strength of the first structure layer ranges from 300 MPa to 1500 MPa.

[0015] The technical scheme of the embodiment provides a strength range of the first structure layer, so that the first structure layer can better protect the bottom of the battery device; at the same time, the risk of the reinforcing plate deforming and extruding the battery monomer can be reduced.

[0016] In some embodiments, the material of the second structure layer comprises composite material.

[0017] In the technical scheme of the embodiment, the material of the second structure layer comprises composite material, so that the second structure layer can provide support for the battery monomer and provide protection for the battery monomer; at the same time, the second structure layer can be relatively light in weight, so as to reduce the weight of the entire reinforcing plate and reduce the negative impact of the reinforcing plate on the overall weight of the battery device.

[0018] In some embodiments, the material of the second structure layer comprises resin and fiber.

[0019] The technical scheme of the embodiment provides specific materials of the second structure layer, so that the second structure layer can have certain strength, good insulation performance, good corrosion resistance, light weight, and other advantages.

[0020] In some embodiments, the third structure layer is a deformation layer.

[0021] In the technical scheme of the embodiment, the third structure layer is a deformation layer, so that the third structure layer can absorb the deformation of the bottom plate, thereby reducing the risk of the second structure layer deforming and extruding the battery monomer.

[0022] In some embodiments, the material of the third structure layer comprises at least one of rubber, foam, and foaming glue.

[0023] The technical scheme of the embodiment provides specific materials of the third structural layer, so that the third structural layer has elastic deformation capability, thereby enabling the third structural layer to better absorb the collision energy received by the bottom plate and the first structural layer and to absorb the deformation of the bottom plate and the first structural layer.

[0024] In some embodiments, the third structural layer is provided with a cavity.

[0025] The technical scheme of the embodiment provides specific structures of the third structure, so that the third structural layer has a certain deformation capability and can absorb the deformation amount of the bottom plate and the first structural layer through the cavity, thereby reducing the risk of deformation of the second structural layer and extrusion of the battery monomer.

[0026] In some embodiments, the battery device further comprises a heat exchange assembly, the heat exchange assembly is arranged on the side of the reinforced plate layer away from the bottom plate, and at least part of the battery monomer is connected to the side of the heat exchange assembly away from the reinforced plate.

[0027] In the technical scheme of the embodiment, the heat exchange assembly is arranged to adjust the temperature of the battery monomer through the heat exchange structure, so that the battery monomer can be more efficiently charged and discharged at a suitable working temperature; at the same time, the heat exchange assembly is arranged on the reinforced plate, and in the case that the bottom plate is subjected to collision or impact, the heat exchange assembly can also play a protective role and can absorb the collision energy and deformation amount, thereby playing a certain protective role on the battery monomer.

[0028] In some embodiments, the side of the bottom plate facing the containing space is provided with a first containing groove; part of the reinforced plate is contained in the first containing groove, and a second containing groove is formed on the side away from the first containing groove, and the heat exchange assembly is contained in the second containing groove.

[0029] In the technical scheme of the embodiment, the second containing groove is arranged, and the heat exchange assembly is contained in the second containing groove, so as to play a role in auxiliary fixing of the heat exchange assembly, and at the same time, the flatness of the inside of the first box body can be improved, the battery monomer can be conveniently arranged, and the space utilization rate can be improved, thereby playing a role in improving the energy density.

[0030] In some embodiments, the side of the heat exchange assembly facing the containing space is flush with the side of the reinforced plate facing the containing space.

[0031] In the technical scheme of the embodiment, the heat exchange assembly is flush with the reinforced plate, so that the battery monomer can be connected to the heat exchange assembly and the reinforced plate at the same time, thereby enabling the reinforced plate and the heat exchange assembly to better provide support for the battery monomer; at the same time, the space utilization rate of the inside of the first box body can be improved, and the energy density of the battery device can be improved.

[0032] In some embodiments, at least part of the heat exchange assembly protrudes from the reinforcing plate towards the containing space; at least part of the battery cell is connected to the side of the heat exchange assembly away from the reinforcing plate, so that the battery cell is arranged apart from the reinforcing plate.

[0033] In the technical solution of the embodiment, the battery cell is supported by the heat exchange assembly, and a gap exists between the battery cell and the reinforcing plate, so that the deformation of the bottom plate and the reinforcing plate is absorbed through the gap, and the collision energy received by the bottom plate is buffered, thereby further reducing the risk of damage to the battery cell.

[0034] In some embodiments, the frame is integrally formed with the bottom plate.

[0035] In the technical solution of the embodiment, the frame is integrally formed with the bottom plate, so that the first box body can have higher structural strength and rigidity, while saving the connecting member and reducing the weight.

[0036] In some embodiments, the material of the frame and the bottom plate includes resin and fiber.

[0037] The technical solution of the embodiment provides specific materials of the frame and the bottom plate, so that the first box body can have certain strength, good insulation performance, good corrosion resistance, light weight and other advantages.

[0038] In some embodiments, the side of the frame away from the containing space is connected with a beam body.

[0039] In the technical solution of the embodiment, the beam body is provided to improve the strength of the side of the first box body through the beam body, and the battery device is conveniently mounted on the vehicle chassis or other parts through the beam body.

[0040] In some embodiments, the material of the beam body includes metal.

[0041] In the technical solution of the embodiment, the material of the beam body includes metal, so that the beam body can have higher strength to better protect the bottom of the battery device; at the same time, the risk of external debris piercing the first box body is reduced, thereby better protecting the battery cell.

[0042] In a second aspect, the embodiment of the application further provides a power consumption device comprising the battery device provided by some embodiments of the first aspect.

[0043] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0044] 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:

[0045] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0046] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0047] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0048] Figure 4 This is a perspective view of a battery device provided in some embodiments of this application;

[0049] Figure 5 This is an exploded structural diagram of the box provided in some embodiments of this application;

[0050] Figure 6 This is a top view schematic diagram of a battery device provided in some embodiments of this application;

[0051] Figure 7 for Figure 6 Cross-sectional view at line AA;

[0052] Figure 8 for Figure 7 A magnified view of a portion of point B in the middle;

[0053] Figure 9 for Figure 8 A magnified view of a portion of point C.

[0054] The markings in the diagram mean:

[0055] 1000, vehicles;

[0056] 100. Battery device;

[0057] 10. Box body; 11. First box body; 111. Frame; 112. Base plate; 1121. First receiving slot; 113. Receiving space; 114. Beam; 12. Second box body;

[0058] 20. Battery cell assembly; 21. Battery cell; 211. Housing; 212. End cap; 213. Electrode assembly; 214. Electrode terminal;

[0059] 30, reinforcing plate; 31, first structural layer; 32, second structural layer; 321, second accommodating groove; 33, third structural layer;

[0060] 40, heat exchange assembly;

[0061] 200, motor;

[0062] 300, controller. DETAILED DESCRIPTION

[0063] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0064] 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 belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0066] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0068] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0069] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0070] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0071] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0072] For vehicles, the bottom of the battery device usually faces the road surface, and external impurities (such as gravel, road bumps, etc.) are easy to collide with the bottom of the battery device and damage the battery monomers in the box. In order to play a good bottom protection effect, the bottom of the box of the battery device is usually provided with a bottom guard plate, which is usually a metal plate with a certain thickness, which leads to the weight of the bottom guard plate is usually heavy.

[0073] Moreover, the box of the current battery device is also usually made of metal material, which further increases the overall weight of the box, and thus the overall weight of the battery device is difficult to reduce.

[0074] Based on the above considerations, in order to alleviate the problem that the current battery device is difficult to balance the bottom protection and weight reduction, the embodiments of the present application provide a battery device, which makes the box include a first box, and makes the first box include a bottom plate and a frame, and a reinforcing plate is arranged on the side of the bottom plate facing the battery monomer assembly, so as to better protect the bottom of the battery device through the reinforcing plate; at the same time, the material of the first box includes a composite material.

[0075] In the battery device, the bottom plate matching reinforcing plate can provide bottom protection and support for the battery device assembly, improve the strength of the bottom of the box body, thereby improving the protection performance of the bottom of the box body; the material of the first box body includes a composite material, thereby reducing the weight of the first box body and reducing the negative impact of the weight of the first box body on the overall weight of the battery device.

[0076] The battery device disclosed by the embodiments of the present application can be used in a power consumption device using the battery device as a power supply or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0077] The following embodiments are described by taking a power consumption device of an embodiment of the present application as a vehicle 1000 for convenience of description.

[0078] Reference Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the present application is a structural schematic diagram. 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 electric automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 200, and the controller 300 is used to control the battery to supply power to the motor 200, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0079] In some embodiments of the present application, the battery 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, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Reference Figure 2 , Figure 2 The battery device 100 provided by some embodiments of the present application is an exploded structural schematic diagram. The battery device 100 mentioned in the embodiments of the present application can include one or more battery monomer assemblies 20 for providing voltage and capacity. The battery monomer assembly 20 can include a plurality of battery monomers 21 connected in series, parallel or mixed connection through a busbar component.

[0081] In some embodiments, the battery cell assembly 20 is generally formed by arranging a plurality of battery cells 21.

[0082] As an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing a plurality of battery cells 21 into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 21 with a cable tie.

[0083] In some embodiments, the battery device 100 can be a battery pack, which includes the case 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed in the case 10.

[0084] As an example, the battery cell assembly 20 can be a battery module, which can be housed in the case 10 by fixing the battery module in the case 10.

[0085] As an example, the battery cell assembly 20 can also be housed in the case 10 by fixing a plurality of battery cells 21 directly to the case 10.

[0086] As an example, the case 10 can include a first case 11 and a second case 12. The first case 11 and the second case 12 are coupled so that an enclosed space is formed inside the case 10 to house the battery cell assembly 20. Here, enclosed means covered or closed, which can be sealed or unsealed. The first case 11 can be a top cover or a bottom plate 112.

[0087] As an example, the case 10 can include a top cover, a frame, and a bottom plate 112. The top cover and the bottom plate 112 are respectively connected to the frame so that an enclosed space is formed inside the case 10 to house the battery cell assembly 20.

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

[0089] Reference Figure 3 , Figure 3 A schematic diagram of the exploded structure of the battery cell 21 is provided for some embodiments of the present application. The battery cell 21 refers to the smallest unit that constitutes a battery. As shown in the figure, the battery cell 21 includes an end cover 212, a shell 211, an electrode assembly 213, and other functional components.

[0090] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Optionally, the end cover 212 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 212 is less likely to deform when subjected to extrusion collision, allowing the battery cell 21 to have higher structural strength and improved safety performance. The end cover 212 can be provided with functional components such as the electrode terminal 214. The electrode terminal 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the end cover 212 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 21 when the internal pressure or temperature reaches a threshold value. The material of the end cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 212, which can be used to isolate the electrical connection components in the shell 211 from the end cover 212 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0091] The shell 211 is a component for fitting the end cover 212 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, electrolyte and other components. The shell 211 and the end cover 212 can be independent components, and an opening can be provided on the shell 211, and the end cover 212 is covered on the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the shell 211 can also be integrated, specifically, the end cover 212 and the shell 211 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 211, the end cover 212 is covered on the shell 211. The shell 211 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0092] The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 can be included in the case 211. The electrode assembly 213 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 213, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminal 214 to form a current loop.

[0093] In a first aspect, with reference to Figures 4 to 9 In an embodiment of the present application, a battery device 100 is provided, which includes a case 10, a battery cell 21, and a reinforcing plate 30. The case 10 includes a first case 11. The first case 11 includes a frame 111 and a bottom plate 112 connected to the frame 111. The frame 111 and the bottom plate 112 are made of a composite material. The frame 111 and the bottom plate 112 enclose a receiving space 113 with an open end. The battery cell 21 is received in the receiving space 113. The reinforcing plate 30 is connected to the bottom plate 112. The reinforcing plate 30 includes a first structural layer 31 and a second structural layer 32. The first structural layer 31 is connected to one side of the bottom plate 112 facing the receiving space 113. The second structural layer 32 is connected to one side of the first structural layer 31 away from the bottom plate 112. The battery cell 21 is connected to the second structural layer 32. The first structural layer 31 has a greater strength than the second structural layer 32.

[0094] In the drawings, the direction of the X-axis is the length direction of the battery device 100, the direction of the Y-axis is the width direction of the battery device 100, and the direction of the Z-axis is the height direction of the battery device 100.

[0095] The case 10 refers to a structure in the battery device 100 that provides a receiving space 113 for structures such as the battery cell 21.

[0096] The first case 11 refers to a structure in the case 10 that carries the battery cell 21 or other structures. In the case 10 includes the first case 11 and the second case 12, the first case 11 is used to accommodate structures such as the battery cell 21, and the second case 12 is used to cover and close the first case 11. According to the shape of the case 10, the first case 11 can be prismatic, cylindrical, or other shapes. The material of the first case 11 can include metal, plastic, or other materials.

[0097] The frame 111 refers to a structure in the first box body 11 for providing side protection for the battery monomer 21, and the frame 111 can include a plurality of edge beams connected in sequence. The frame 111 can be a quadrilateral square frame structure, or a pentagonal, hexagonal or other shape frame structure. The beam body 114 in the frame 111 can be a box beam, or an I-beam or other shape beam structure. The material of the frame 111 can include metal, plastic or other materials.

[0098] The bottom plate 112 refers to a structure in the first box body 11 for bearing the battery monomer 21 or other structures. The bottom plate 112 can be a circular plate structure, a square plate structure or other shape plate structure. The bottom plate 112 is connected to the frame 111, and can be connected to the frame 111 by welding, bonding, screwing or other means. The bottom plate 112 can also be integrally formed with the frame 111. The material of the bottom plate 112 can include metal, plastic or other materials, and can be the same as or different from the material of the frame 111.

[0099] The material of the frame 111 and the bottom plate 112 includes a composite material, which can include resin and fiber materials. Compared with metal materials or alloys, the composite material has a lighter weight, and can provide a mounting base and protection for the battery device 100 or other structures while reducing the overall weight of the battery device 100. At the same time, the use of composite materials can also meet various different requirements such as insulation and corrosion resistance.

[0100] The bottom plate 112 and the frame 111 can enclose a containing space 113, which is the space structure in the first box body 11. The battery monomer 21 or other structures are contained in the containing space 113. The containing space 113 can be a prismatic space structure, a cylindrical space structure or other shape space structure. The shape of the containing space 113 can be set according to the shape of the frame 111 to adapt to the first box body 11, or can be different from the shape of the frame 111.

[0101] The battery monomer 21 refers to the smallest unit of the battery device 100. The number of battery monomers 21 can be one, two or more. When the number of battery monomers 21 is at least two, the battery monomers 21 can be connected in series, parallel or mixed. The battery monomers 21 can be arranged in one direction, or arrayed in two different directions. The battery monomers 21 can be fixed and constrained by a strap, a plate or other structure, or can be directly arranged in the containing space 113 of the first box body 11.

[0102] The reinforcing plate 30 refers to a structure in the battery device 100 for reinforcing the strength of the bottom plate 112 and protecting the bottom of the battery monomer 21. The shape of the reinforcing plate 30 can be circular, square or other shapes. The shape of the reinforcing plate 30 can be the same as or different from that of the bottom plate 112.

[0103] The reinforcing plate 30 is connected to the bottom plate 112 and accommodated in the accommodation space 113, that is, the reinforcing plate 30 is arranged on the side of the bottom plate 112 facing the accommodation space 113. The reinforcing plate 30 is connected to the bottom plate 112. The reinforcing plate 30 can be connected to the bottom plate 112 by adhesion, welding, screwing or other means. On the basis of the reinforcing plate 30 being connected to the bottom plate 112, the reinforcing plate 30 can be connected to the frame 111 or can not be connected to the frame 111 or have a gap between the reinforcing plate 30 and the frame 111.

[0104] The first structure layer 31 is part of the reinforcing plate 30. The first structure layer 31 is a structure in the reinforcing plate 30 connected to the bottom plate 112. The first structure layer 31 is connected to the side of the bottom plate 112 facing the accommodation space 113. The first structure layer 31 can be connected to the bottom plate 112 by adhesion, welding, screwing or other means. The shape of the first structure layer 31 can be circular, square or other shapes. The shape of the first structure layer 31 can be the same as or different from that of the bottom plate 112. The material of the first structure layer 31 can include metal or other materials.

[0105] The second structure layer 32 is part of the reinforcing plate 30. The battery monomer 21 is connected to the second structure layer 32, that is, the second structure layer 32 is a structure on the side of the reinforcing plate 30 facing the accommodation space 113. The shape of the second structure layer 32 can be circular, square or other shapes. The shape of the second structure layer 32 can be the same as or different from that of the first structure layer 31. The material of the second structure layer 32 can include metal, plastic or other materials.

[0106] The second structure layer 32 is connected to the side of the first structure layer 31 away from the bottom plate 112. The second structure layer 32 can be directly connected to the first structure layer 31 or an intermediate structure can be arranged between the first structure layer 31 and the second structure layer 32 so that the second structure layer 32 is indirectly connected to the first structure layer 31 through the intermediate structure. In the case where the second structure layer 32 is directly connected to the first structure layer 31, the second structure layer 32 can be connected to the first structure layer 31 by adhesion, welding, screwing or other means.

[0107] The battery monomer 21 is connected to the second structure layer 32. The battery monomer 21 can be directly connected to the second structure layer 32 or indirectly connected to the second structure layer 32 through an intermediate structure. In the case where the battery monomer 21 is directly connected to the second structure layer 32, the battery monomer 21 can be connected to the second structure layer 32 by adhesion, welding, clamping or other means.

[0108] The strength of the first structural layer 31 is greater than that of the second structural layer 32. Since the first structural layer 31 is connected to the bottom plate 112, the force borne by the bottom plate 112 will first be transmitted to the first structural layer 31. This arrangement enables the reinforcing plate 30 to better improve the strength of the bottom plate 112. In the case where the bottom plate 112 is subjected to external impact, the first structural layer 31 can bear and share the impact energy received by the bottom plate 112, while also reducing the risk of deformation of the first structural layer 31 and the bottom plate 112, thereby reducing the risk of deformation and extrusion of the reinforcing plate 30 and the bottom plate 112 against the battery monomer 21.

[0109] For example, in the case where the battery device 100 is applied to a vehicle 1000, the battery device 100 can be hung on the chassis of the vehicle 1000. At this time, the chassis can bear the force above the battery device 100, and the battery device 100 has a lower requirement for the support performance above it. Meanwhile, the chassis can provide certain protection to the battery device 100 on the side thereof. Therefore, the materials of the frame 111 and the bottom plate 112 in the first box body 11 can include composite materials. At this time, the first box body 11 can function to bear the battery monomer 21, and the weight of the first box body 11 is also relatively light, thereby reducing the weight of the entire vehicle.

[0110] For example, in the case where the materials of the frame 111 and the bottom plate 112 include composite materials, the reinforcing plate 30 is arranged on the bottom plate 112 to provide protection to the bottom of the battery device 100 and reduce the risk of bottom impact damaging the battery device 100.

[0111] In this embodiment, the reinforcing plate 30 is arranged on the bottom plate 112 of the box body 10, and the reinforcing plate 30 includes the first structural layer 31 and the second structural layer 32, so as to improve the strength of the bottom of the box body 10 through the reinforcing plate 30, thereby improving the protection performance of the bottom of the box body 10. The materials of the frame 111 and the bottom plate 112 both include composite materials, so that the first box body 11 can not only provide support for the battery monomer 21, but also provide protection for the battery monomer 21. Meanwhile, the weight of the first box body 11 is relatively light, so as to reduce the negative impact of the weight of the first box body 11 on the overall weight of the battery device 100.

[0112] Reference Figures 4 to 9 In some embodiments, the side of the bottom plate 112 away from the accommodation space 113 is directly exposed to the external environment.

[0113] The side of the bottom plate 112 facing away from the accommodation space 113 is directly exposed to the external environment, where the external environment refers to the environment outside the box 10. In this case, the bottom plate 112 is directly exposed to the external environment, which means that the side of the bottom plate 112 facing the external environment is directly exposed to the external environment without being blocked by other structures. Compared with the current battery device 100, this arrangement means that the bottom plate 112 is no longer provided with a bottom guard plate.

[0114] Because the side of the bottom plate 112 facing the accommodation space 113 is provided with the reinforcing plate 30, the box 10 has high protection performance for the bottom of the battery monomer 21. Therefore, there is no need to set a bottom guard plate at this time, so as to reduce the height of the battery device 100, reduce the space occupation of the battery device 100, and also reduce the overall weight of the battery device 100.

[0115] In the embodiment, the bottom plate 112 of the box 10 is directly exposed to the external environment, that is, the bottom guard plate is no longer arranged at the bottom of the box 10, so as to reduce the height of the battery device 100, reduce the space occupation and weight of the battery device 100.

[0116] Reference Figures 4 to 9 In some embodiments, the reinforcing plate 30 further comprises a third structural layer 33, and the third structural layer 33 is arranged between the first structural layer 31 and the second structural layer 32.

[0117] The third structural layer 33 is part of the reinforcing plate 30, and the third structural layer 33 is located between the first structural layer 31 and the second structural layer 32. The shape of the third structural layer 33 can be circular, square or other shapes. The shape of the third structural layer 33 can be the same as or different from the shape of the first structural layer 31 and / or the second structural layer 32. The material of the third structural layer 33 can include metal, plastic or other materials.

[0118] The third structural layer 33 is located between the first structural layer 31 and the second structural layer 32. The third structural layer 33 can be directly connected to the first structural layer 31 and the second structural layer 32, or indirectly connected to the first structural layer 31 and the second structural layer 32 through an intermediate structure. In the case where the third structural layer 33 is directly connected to the first structural layer 31 and the second structural layer 32, the third structural layer 33 can be connected to the first structural layer 31 by adhesion, welding, screwing or other means. The third structural layer 33 can be connected to the second structural layer 32 by adhesion, welding, screwing or other means.

[0119] In the case where the reinforcing plate 30 comprises the first structural layer 31, the second structural layer 32 and the third structural layer 33, the reinforcing plate 30 is a multi-layer structure. In this case, the materials of the first structural layer 31, the second structural layer 32 and the third structural layer 33 can be different to meet various needs of the reinforcing plate 30.

[0120] In the case that the bottom plate 112 is subjected to external impact, the first structural layer 31, the second structural layer 32 and the third structural layer 33 can share the impact energy of the bottom plate 112 layer by layer, so as to improve the strength of the bottom plate 112 and reduce the risk of deformation of the bottom plate 112 and the reinforcing plate 30, thereby reducing the risk of deformation of the bottom plate 112 and the reinforcing plate 30 and extrusion of the battery monomer 21.

[0121] In the embodiment, the reinforcing plate 30 is a three-layer structure, so that the reinforcing plate 30 can better protect the bottom of the battery device 100.

[0122] In some embodiments, the material of the first structural layer 31 includes metal.

[0123] The material of the first structural layer 31 includes metal, which can include iron, aluminum, copper, steel or other metals. The material of the first structural layer 31 can include only one kind of metal, or two or more different metals. In addition to metal, the material of the first structural layer 31 can also include other materials to make the first structural layer 31 have more different properties. For example, the first structural layer 31 is a steel plate.

[0124] Since the first structural layer 31 is the structure of the reinforcing plate 30 connected to the bottom plate 112, the force borne by the bottom plate 112 will first be transmitted to the first structural layer 31. Therefore, the material of the first structural layer 31 includes metal, so that the first structural layer 31 can better support the bottom plate 112 to improve the strength of the bottom plate 112 and reduce the risk of deformation of the bottom plate 112.

[0125] In the embodiment, the material of the first structural layer 31 includes metal, so that the first structural layer 31 has high strength to better protect the bottom of the battery device 100. At the same time, it can also reduce the risk of external debris piercing the reinforcing plate 30, thereby better protecting the battery monomer 21.

[0126] In some embodiments, the strength of the first structural layer 31 ranges from 300 MPa to 1500 MPa.

[0127] The strength of the first structural layer 31 can be 300 MPa, 500 MPa, 700 MPa, 900 MPa, 1100 MPa, 1300 MPa, 1500 MPa or other values.

[0128] The greater the strength of the first structural layer 31, the better the protection performance of the first structural layer 31 to the bottom of the battery monomer 21, the better the impact performance of the bottom plate 112 and the reinforcing plate 30, and the lower the risk of deformation of the bottom plate 112 and the reinforcing plate 30.

[0129] Meanwhile, the strength of the first structural layer 31 is positively correlated with the thickness, density, and cost of the first structural layer 31. The higher the strength of the first structural layer 31, the higher one or more of the thickness, weight, and cost of the first structural layer 31. The greater the thickness of the first structural layer 31, the greater the strength of the first structural layer 31, and the greater the space occupied by the first structural layer 31. The greater the weight of the first structural layer 31, the greater the strength of the first structural layer 31, and the greater the overall weight of the battery device 100.

[0130] Accordingly, the strength of the first structural layer 31 ranges from 300 MPa to 1500 MPa, so that the first structural layer 31 can not only improve the strength of the bottom plate 112 and reduce the risk of deformation of the bottom plate 112 and the reinforcing plate 30, but also reduce the weight, space occupation, and cost.

[0131] For example, the strength of the first structural layer 31 can be 300 MPa, in which case the thickness of the first structural layer 31 is small, and the weight is low, thereby reducing the negative impact of the reinforcing plate 30 on the space occupation, energy density, and weight of the battery device 100.

[0132] For example, the strength of the first structural layer 31 can be 900 MPa, in which case the thickness and weight of the first structural layer 31 are moderate, so that the reinforcing plate 30 can not only better improve the strength of the bottom plate 112, but also make the weight and space occupation of the reinforcing plate 30 smaller.

[0133] For example, the strength of the first structural layer 31 can be 1500 MPa, in which case the thickness and weight of the first structural layer 31 are large, so that the reinforcing plate 30 can not only better improve the strength of the bottom plate 112, but also better reduce the risk of deformation of the bottom plate 112 and the reinforcing plate 30.

[0134] The strength of the first structural layer 31 can be detected by a sampling tensile test method, a surface hardness method, an ultrasonic hardness detection method, or other commonly used detection methods. For example, in the sampling tensile test method, a sample of the first structural layer 31 is placed in the clamp of a material testing machine, and the material testing machine uniformly loads the sample with force, and the force-displacement curve or the force-strain curve is observed until the test breaks. Then, the broken area, the broken distance, and other parameters are measured to calculate the strength.

[0135] The present embodiment provides some strength ranges of the first structural layer 31, so that the first structural layer 31 can better protect the bottom of the battery device 100, and also reduce the risk of deformation of the reinforcing plate 30 and extrusion of the battery monomer 21.

[0136] In some embodiments, the material of the second structural layer 32 includes a composite material.

[0137] The second structure layer 32 is a structure of the reinforcing plate 30 facing the battery cell 21, and the battery cell 21 is connected to the second structure layer 32, so the second structure layer 32 should have certain insulation layer performance, and at the same time, it should have certain corrosion resistance in the case of overflow of the cooling medium, electrolyte or other substances of the battery device 100.

[0138] At the same time, since the first structure layer 31 is a structure mainly providing strength in the reinforcing plate 30, the setting of the second structure layer 32 should focus more on reducing weight and reducing space occupation.

[0139] Accordingly, the material of the second structure layer 32 includes a composite material, which can include resin, fiber material.

[0140] Compared with metal materials or metal composite materials, the weight of the composite material can be lighter, so as to reduce the negative impact of the setting of the reinforcing plate 30 on the overall weight of the battery device 100; at the same time, the selection of the composite material can also meet various different requirements such as insulation and corrosion resistance.

[0141] In the embodiment, the material of the second structure layer 32 includes a composite material, so that the second structure layer 32 can provide support and protection for the battery cell 21; at the same time, the weight of the second structure layer 32 can be lighter, so as to reduce the weight of the entire reinforcing plate 30 and reduce the negative impact of the reinforcing plate 30 on the overall weight of the battery device 100.

[0142] In some embodiments, the material of the second structure layer 32 includes resin and fiber.

[0143] Resin is a high molecular compound, which can include natural products such as rosin, amber, shellac, etc., and can also be artificially synthesized products such as polyethylene, epoxy resin, polyester resin, etc. Resin has the advantages of lightweight, corrosion resistance, good electrical insulation performance, high processing efficiency, etc.

[0144] Fiber refers to a filamentous or bundled material with high strength, high rigidity and large aspect ratio, which can include glass fiber, carbon fiber or other fiber materials; fiber has the advantages of high strength, lightweight, corrosion resistance, good electrical insulation performance, good heat insulation performance, etc.

[0145] The second structure layer 32 includes resin and fiber, so that the second structure layer 32 can have lighter weight, good electrical insulation performance, good corrosion resistance and certain strength and support performance; so that the reinforcing plate 30 can not only protect the bottom of the battery cell 21 and provide support for the battery cell 21, but also have lighter weight to reduce the negative impact of the reinforcing plate 30 on the overall weight of the battery device 100.

[0146] The second structural layer 32 can have certain strength, and can have good insulation performance, good corrosion resistance, light weight, and the like.

[0147] In some embodiments, the third structural layer 33 is a deformation layer.

[0148] The third structural layer 33 is a deformation layer, that is, the third structural layer 33 can be deformed under the action of an external force. The deformation of the third structural layer 33 can absorb the energy generated by external impact, thereby reducing the energy transmitted to the battery monomer 21.

[0149] In the case where the bottom plate 112 is deformed due to impact, the third structural layer 33 can absorb part or all of the deformation amount of the bottom plate 112, so as to reduce the deformation amount of the second structural layer 32, thereby reducing the risk of damage caused by the reinforcing plate 30 pressing the battery monomer 21.

[0150] In the case where the bottom plate 112 is pierced by a foreign object, the deformation of the third structural layer 33 can also provide resistance to the pierced foreign object, so as to better hinder the foreign object from contacting the battery monomer 21.

[0151] The deformation of the third structural layer 33 can be elastic deformation or plastic deformation. The third structural layer 33 can be deformed by its material or by its structure. For example, the material of the third structural layer 33 can include rubber, foam, and the like, so as to realize elastic deformation of the third structural layer 33 by the material. For example, the third structural layer 33 can also be a gas bag structure, so as to realize deformation and absorption of impact energy. For example, the third structural layer 33 can also be provided with a honeycomb cavity, so as to realize deformation and absorption of impact energy. It can be understood that, on the basis of the deformation of the third structural layer 33, the third structural layer 33 can also include other materials or structures, and is not limited to the above-mentioned materials or structures.

[0152] In the embodiment, the third structural layer 33 is a deformation layer, so that the third structural layer 33 can absorb the deformation of the bottom plate 112, thereby reducing the risk of deformation of the second structural layer 32 and pressing the battery monomer 21.

[0153] In some embodiments, the material of the third structural layer 33 includes at least one of rubber, foam, and foaming glue.

[0154] Rubber is a kind of high-molecular polymer with high elastic deformation capacity. Rubber includes styrene-butadiene rubber, nitrile rubber, chloroprene rubber, silicone rubber, and the like. Rubber has excellent elastic deformation capacity and shock absorption capacity, and also has excellent wear resistance and fatigue resistance, excellent electrical insulation performance, excellent corrosion resistance, and excellent weather resistance, and the like.

[0155] Foam is a kind of porous material formed by a large number of bubbles in a polymer matrix through physical or chemical foaming process. Foam includes polyurethane foam, polyethylene foam, polypropylene foam, silica gel foam, etc. Foam has excellent cushioning and energy absorption performance, and also has excellent lightweight performance, excellent acid and alkali resistance, excellent aging resistance, etc.

[0156] Foaming glue is a kind of high polymer material with polyurethane as the main component, which is foamed and expanded by physical or chemical reaction to form a foam body with adhesion and elasticity. Foaming glue has excellent elastic deformation and shock absorption performance, and also has excellent heat insulation performance, excellent aging resistance and chemical stability, excellent flame retardant performance, etc.

[0157] The material of the third structural layer 33 can include one of rubber, foam and foaming glue, or two or three of rubber, foam and foaming glue.

[0158] The third structural layer 33 includes at least one of rubber, foam and foaming glue, so that the third structural layer 33 has elastic deformation capability; in the case that the bottom plate 112 is deformed due to collision, the third structural layer 33 can absorb part or all of the deformation amount of the bottom plate 112, so as to reduce the deformation amount of the second structural layer 32, thereby reducing the risk of damage caused by the pressing of the battery monomer 21 by the reinforcing plate 30; in the case that the bottom plate 112 is pierced by foreign matter, the deformation of the third structural layer 33 can also provide resistance to the pierced foreign matter, so as to better hinder the foreign matter from contacting the battery monomer 21.

[0159] The embodiment provides some specific materials of the third structural layer 33, so that the third structural layer 33 has elastic deformation capability, thereby enabling the third structural layer 33 to better absorb the collision energy received by the bottom plate 112 and the first structural layer 31, and to absorb the deformation of the bottom plate 112 and the first structural layer 31.

[0160] In some embodiments, the third structural layer 33 is provided with a cavity.

[0161] The third structural layer 33 is provided with a cavity, the number of the cavity can be one, two or more; the cavity can be a circular space structure, an elliptical space structure, a prismatic space structure or other shaped space structure; the cavity can be an empty space, that is, the cavity is not filled with other substances, or the cavity can be filled with particulate matter or other substances, so as to provide more resistance to the foreign matter in the case that the cavity is pierced by the foreign matter.

[0162] The volume of the cavity can be small to occupy a small space in the third structural layer 33, and in this case, the third structural layer 33 has a high strength. The volume of the cavity can also be large to occupy a large space in the third structural layer 33, and in this case, the third structural layer 33 has a low strength, but can have a large deformation amount and can absorb more collision energy.

[0163] The cavity allows the third structural layer 33 to have a large deformation amount. In the case of an external collision or impact on the bottom plate 112, the third structural layer 33 can deform into the cavity and absorb collision energy, thereby reducing the collision energy transmitted to the battery cell 21 and improving the protection effect of the bottom plate 112 and the reinforcing plate 30. In the case of a large collision energy, the third structural layer 33 can also irreversibly deform, such as breaking, and absorb more collision energy. In this case, the cavity provides more space for irreversible deformation of the third structural layer 33, thereby reducing the risk of the third structural layer 33 breaking into the accommodation space 113 and piercing the battery cell 21.

[0164] In the case of the cavity in the third structural layer 33, the material of the third structural layer 33 can include metal, rubber, foam, foaming glue, etc.

[0165] The embodiment provides some specific structures of the third structure, so that the third structural layer 33 has a certain deformation capacity, and can also absorb the deformation amount of the bottom plate 112 and the first structural layer 31 through the cavity, thereby reducing the risk of the second structural layer 32 deforming and pressing the battery cell 21.

[0166] Reference Figures 4 to 9 In some embodiments, the battery device 100 further includes a heat exchange assembly 40, which is arranged on the side of the reinforcing plate 30 away from the bottom plate 112, and at least part of the battery cell 21 is connected to the side of the heat exchange assembly 40 away from the reinforcing plate 30.

[0167] The heat exchange assembly 40 refers to a structure of the battery device 100 for adjusting the temperature of the battery cell 21. The heat exchange assembly 40 can exchange heat with each battery cell 21 in the battery cell 21 to reduce or increase the temperature of the battery cell 21. The heat exchange assembly 40 can include a direct cooling structure, a liquid cooling structure, and can also include an electric heating, air cooling structure or other structure.

[0168] For example, the heat exchange assembly 40 is a liquid cooling structure, and the heat exchange assembly 40 includes a plurality of heat exchange plates, each of which is provided with a flow channel for the flow of a heat exchange medium.

[0169] The heat exchange assembly 40 is arranged on the side of the reinforcing plate 30 away from the bottom plate 112. In the case where the second structural layer 32 is the outermost layer on the side of the reinforcing plate 30 facing the accommodating space 113, the heat exchange assembly 40 is arranged on the side of the second structural layer 32 away from the bottom plate 112. The heat exchange assembly 40 can be connected to the reinforcing plate 30 by welding, bonding, screwing or other means.

[0170] At least part of the battery monomer 21 is connected to the side of the heat exchange assembly 40 away from the reinforcing plate 30. In the case where the battery monomer 21 is connected to the reinforcing plate 30, the heat exchange assembly 40 is located between the reinforcing plate 30 and the battery monomer 21. At this time, the battery monomer 21 can be completely connected to the heat exchange assembly 40 to indirectly connect to the reinforcing plate 30 through the heat exchange assembly 40, or the battery monomer 21 can be partially connected to the heat exchange assembly 40 and partially connected to the reinforcing plate 30. The battery monomer 21 can be connected to the corresponding heat exchange assembly 40 by welding, bonding, clamping or other means.

[0171] At least part of the battery monomer 21 is connected to the heat exchange assembly 40. At this time, the heat exchange assembly 40 can exchange heat with the connected battery monomer 21 to control the temperature of the battery monomer 21. At the same time, the heat exchange assembly 40 can also provide certain support for the battery monomer 21.

[0172] The heat exchange assembly 40 is connected to the reinforcing plate 30, so that the heat exchange assembly 40 can also improve the strength of the bottom plate 112 through the reinforcing plate 30, and reduce the risk of deformation of the bottom plate 112 and the reinforcing plate 30. At the same time, in the case where foreign matter pierces the bottom plate 112, the heat exchange assembly 40 can also provide resistance to the piercing of foreign matter to reduce the risk of the foreign matter contacting and piercing the battery monomer 21.

[0173] In the embodiment, the heat exchange assembly 40 is arranged to adjust the temperature of the battery monomer 21 through the heat exchange structure, so that the battery monomer 21 can be more efficient in charging and discharging at an appropriate working temperature. At the same time, the heat exchange assembly 40 is arranged on the reinforcing plate 30. In the case where the bottom plate 112 is subjected to impact or impact, the heat exchange assembly 40 can also play a protective role and can absorb the impact energy and deformation amount, thereby protecting the battery monomer 21 to a certain extent.

[0174] Reference Figures 4 to 9 In some embodiments, the side of the bottom plate 112 facing the accommodating space 113 is provided with a first accommodating groove 1121. Part of the reinforcing plate 30 is accommodated in the first accommodating groove 1121, and a second accommodating groove 321 is formed on the side away from the first accommodating groove 1121. The heat exchange assembly 40 is accommodated in the second accommodating groove 321.

[0175] The first accommodating groove 1121 refers to a groove structure arranged on the side of the bottom plate 112 facing the accommodating space 113. The first accommodating groove 1121 can be formed by deforming a portion of the bottom plate 112 away from the side facing the accommodating space 113, or can be a groove structure directly formed on the side of the bottom plate 112 facing the accommodating space 113. The first accommodating groove 1121 can be a square groove, a semicircular groove, or a groove structure of other shapes. The number of first accommodating grooves 1121 can be one, two, or more.

[0176] The second accommodating groove 321 refers to a groove structure arranged on the side of the reinforcing plate 30 facing the accommodating space 113. The second accommodating groove 321 can be a square groove, a semicircular groove, or a groove structure of other shapes. The number of second accommodating grooves 321 can be one, two, or more. The number of second accommodating grooves 321 can be the same as or different from the number of first accommodating grooves 1121.

[0177] A portion of the reinforcing plate 30 can be accommodated in the first accommodating groove 1121, i.e., a portion of the reinforcing plate 30 can be deformed into the first accommodating groove 1121. This deformation can simultaneously form a second accommodating groove 321 on the side of the reinforcing plate 30 away from the first accommodating groove 1121. At this time, the second accommodating groove 321 is a groove structure formed by the deformation of the reinforcing plate 30.

[0178] The heat exchange assembly 40 is accommodated in the second accommodating groove 321. At this time, the shape of the second accommodating groove 321 can match or not match the shape of the heat exchange assembly 40. In the case where the heat exchange assembly 40 is connected to the reinforcing plate 30, the heat exchange assembly 40 can be connected to the deformed portion of the reinforcing plate 30, so that the heat exchange assembly 40 can be stably installed in the second accommodating groove 321. The heat exchange assembly 40 can be completely accommodated in the second accommodating groove 321, or can be only partially accommodated in the second accommodating groove 321.

[0179] Since the heat exchange assembly 40 is arranged on the reinforcing plate 30, and the reinforcing plate 30 is arranged on the bottom plate 112, in the height direction Z of the battery device 100, the heat exchange assembly 40 is likely to protrude above the reinforcing plate 30, and is likely to cause the bottom of the accommodating space 113 to be uneven, thereby negatively affecting the installation of the battery monomer 21, and is likely to reduce the utilization rate of the accommodating space 113. Accordingly, the first accommodating groove 1121 and the second accommodating groove 321 are arranged, and the heat exchange assembly 40 is accommodated in the second accommodating groove 321, so as to reduce the height of the heat exchange assembly 40 protruding above the reinforcing plate 30, thereby reducing the negative impact of the arrangement of the heat exchange assembly 40 on the arrangement of the battery monomer 21, and improving the utilization rate of the accommodating space 113 and the energy density of the battery device 100.

[0180] In the embodiment, the second accommodating groove 321 is arranged, and the heat exchange assembly 40 is accommodated through the second accommodating groove 321, so as to play a role of auxiliary fixing the heat exchange assembly 40, and meanwhile, the flatness of the inside of the first box body 11 can be improved, the battery monomer 21 can be conveniently arranged, and the space utilization rate can be improved, so as to play a role of improving the energy density.

[0181] Reference Figures 4 to 9 In some embodiments in which the heat exchange assembly 40 is accommodated in the second accommodating groove 321, the side of the heat exchange assembly 40 facing the accommodating space 113 is flush with the side of the reinforcing plate 30 facing the accommodating space 113.

[0182] In the case that the heat exchange assembly 40 is accommodated in the second accommodating groove 321, the side of the heat exchange assembly 40 facing the accommodating space 113 is flush with the side of the reinforcing plate 30 facing the accommodating space 113, so that the bottom of the accommodating space 113 can be more flat, thereby facilitating the installation of the battery monomer 21, and meanwhile, the utilization rate of the accommodating space 113 can be improved, and the energy density of the battery device 100 can be improved.

[0183] The side of the heat exchange assembly 40 facing the accommodating space 113 is flush with the side of the reinforcing plate 30 facing the accommodating space 113, and the battery monomer 21 can be connected to the heat exchange assembly 40 and the reinforcing plate 30 at the same time, and at this time, the heat exchange assembly 40 and the reinforcing plate 30 can provide support for the battery monomer 21, so as to improve the stability of the support.

[0184] For example, in the height direction Z of the battery device 100, the height of the heat exchange assembly 40 is the same as the depth of the second accommodating groove 321, so that the bottom of the accommodating space 113 can be a plane or approximately a plane.

[0185] In the embodiment, the heat exchange assembly 40 is flush with the reinforcing plate 30, so that the battery monomer 21 can be connected to the heat exchange assembly 40 and the reinforcing plate 30 at the same time, so that the reinforcing plate 30 and the heat exchange assembly 40 can better provide support for the battery monomer 21; meanwhile, the space utilization rate of the inside of the first box body 11 can be improved, and the energy density of the battery device 100 can be improved.

[0186] In some embodiments, at least part of the heat exchange assembly 40 protrudes from the side of the reinforcing plate 30 facing the accommodating space 113; at least part of the battery monomer 21 is connected to the side of the heat exchange assembly 40 away from the reinforcing plate 30, so that the battery monomer 21 is arranged in a spaced manner from the reinforcing plate 30.

[0187] At least part of the heat exchange assembly 40 protrudes from the reinforcing plate 30 toward the containing space 113; the side of the reinforcing plate 30 facing the containing space 113 can be a plane, and the first containing groove 1121 can not be arranged on the bottom plate 112, and the second containing groove 321 can also not be arranged on the reinforcing plate 30, at this time, the heat exchange assembly 40 completely protrudes from the reinforcing plate 30; the second containing groove 321 can also be arranged on the reinforcing plate 30, and the depth of the second containing groove 321 is less than the height of the heat exchange assembly 40, so that the heat exchange assembly 40 can protrude from the side of the reinforcing plate 30 facing the containing space 113, at this time, the heat exchange assembly 40 only partially protrudes from the reinforcing plate 30.

[0188] At least part of the battery monomer 21 is connected to the heat exchange assembly 40, that is, the battery monomer 21 can be only partially connected to the heat exchange assembly 40, or can be completely connected to the heat exchange assembly 40.

[0189] In the case where the battery monomer 21 is connected to the heat exchange assembly 40, the battery monomer 21 is arranged in a spaced manner with the reinforcing plate 30, at this time, there is a gap between the battery monomer 21 and the reinforcing plate 30, which can be used to buffer the impact received by the bottom plate 112.

[0190] In the case where the bottom plate 112 is deformed due to impact, the gap can provide space for the deformation of the bottom plate 112 and the reinforcing plate 30, so as to reduce the risk that the deformation of the bottom plate 112 and the reinforcing plate 30 collides with the battery monomer 21, thereby reducing the risk that the reinforcing plate 30 extrudes the battery monomer 21 to cause damage.

[0191] In the case where the bottom plate 112 is pierced by a foreign object, the gap can provide space for the pierced foreign object, so as to reduce the risk that the foreign object contacts and pierces the battery monomer 21.

[0192] In the embodiment, the battery monomer 21 is supported by the heat exchange assembly 40, and there is a gap between the battery monomer 21 and the reinforcing plate 30, so as to absorb the deformation of the bottom plate 112 and the reinforcing plate 30 through the gap, and buffer the impact energy received by the bottom plate 112, thereby further reducing the risk of damage to the battery monomer 21.

[0193] In some embodiments, the frame 111 is integrally formed with the bottom plate 112.

[0194] The frame 111 is integrally formed with the bottom plate 112, and the frame 111 and the bottom plate 112 can be integrally formed by molding, die casting, injection molding or other methods.

[0195] In an example, when the material of the box 10 includes a composite material, the frame 111 and the bottom plate 112 can be integrally formed by a molding process, which is a closed mold forming process for fiber-reinforced resin-based composite materials. In an example, the specific process of the integral forming process can be as follows: the fiber material preform is placed in a closed mold, then the liquid resin is injected into the mold cavity under pressure, so that the liquid resin completely infiltrates the fiber, and finally it is heated and cured to form.

[0196] Integrally forming the frame 111 and the bottom plate 112 can improve the overall performance of the first box 11, and can make the first box 11 have higher strength, rigidity and stability; at the same time, it can also improve the production efficiency and reduce the overall weight of the first box 11.

[0197] In the embodiment, the frame 111 and the bottom plate 112 are integrally formed to make the first box 11 have higher structural strength and rigidity, and also save connecting parts and reduce weight.

[0198] In some embodiments, the materials of the frame 111 and the bottom plate 112 both include resin and fiber.

[0199] Resin is a high molecular compound, which can include natural products such as rosin, amber, shellac, etc., or artificial synthetic products such as polyethylene, epoxy resin, polyester resin, etc. Resin has the advantages of lightweight, corrosion resistance, good electrical insulation performance, high processing efficiency, etc.

[0200] Fiber refers to a filamentous or bundled material with high strength, high rigidity and large aspect ratio. The fiber can include glass fiber, carbon fiber or other fiber materials. Fiber has the advantages of high strength, lightweight, corrosion resistance, good electrical insulation performance, good thermal insulation performance, etc.

[0201] The frame 111 and the bottom plate 112 both include resin and fiber, so that the first box 11 can have a lighter weight, good electrical insulation performance, good corrosion resistance, and certain strength and support performance; so that the first box 11 can provide support and protection for the battery monomer 21, and also has a lighter weight to reduce the overall weight of the battery device 100.

[0202] The embodiment provides some specific materials of the frame 111 and the bottom plate 112, so that the first box 11 can have certain strength, good insulation performance, good corrosion resistance, light weight, etc.

[0203] Reference Figures 4 to 8 In some embodiments, the frame 111 is connected to the beam body 114 away from the side of the containing space 113.

[0204] The beam body 114 refers to a structure in the box body 10 for improving the strength of the frame 111. The beam body 114 can be an I-beam, a box beam, or other beam body 114 structures. The beam body 114 is connected to the frame 111, and the beam body 114 can be connected to the frame 111 by welding, bonding, or other means. The material of the beam body 114 can include metal, plastic, or other materials.

[0205] The number of beam bodies 114 can be one, two, or more. For example, when the frame 111 is a quadrilateral structure, the beam body 114 can have four and be connected to the four sides of the frame 111. For example, when the frame 111 is a quadrilateral structure, the beam body 114 can also have two and correspond to the two sides of the frame 111 along the width direction Y of the battery device 100.

[0206] The beam body 114 is connected to the side of the frame 111 away from the accommodation space 113, that is, the beam body 114 is located outside the frame 111. This arrangement can reduce the occupation of the beam body 114 to the accommodation space 113, thereby reducing the negative impact of the arrangement of the beam body 114 on the utilization rate of the accommodation space 113 and the energy density of the battery device 100.

[0207] The arrangement of the beam body 114 can also provide a mounting base for the mounting structure or other external structure of the battery device 100.

[0208] In this embodiment, the beam body 114 is arranged to improve the strength of the side of the first box body 11 through the beam body 114, and the beam body 114 is also convenient for mounting the battery device 100 on the chassis of the vehicle 1000 or other parts.

[0209] In some embodiments, the material of the beam body 114 includes metal.

[0210] The material of the beam body 114 includes metal, and the material of the beam body 114 can include iron, aluminum, copper, steel, or other metals. The material of the beam body 114 can include only one kind of metal, or two or more different metals. In addition to metal, the material of the beam body 114 can also include other materials to make the beam body 114 have more different properties.

[0211] Since the beam body 114 is used to improve the strength of the side of the frame 111, the material of the beam body 114 includes metal to better support the side of the frame 111 and improve the strength of the side of the frame 111 and reduce the risk of deformation of the side of the frame 111.

[0212] In this embodiment, the material of the beam body 114 includes metal, so that the beam body 114 has high strength to better protect the bottom of the battery device 100; at the same time, the risk of external debris piercing the first box body 11 is reduced, thereby better protecting the battery monomer 21.

[0213] In some embodiments, the battery device 100 includes a box body 10, a battery monomer 21, a reinforcing plate 30, and a heat exchange assembly 40.

[0214] The box body 10 includes a first box body 11, the first box body 11 includes a frame 111 and a bottom plate 112, the frame 111 and the bottom plate 112 enclose an open-ended containing space 113, the frame 111 and the bottom plate 112 are integrally formed into a basin-shaped structure, and the material of the first box body 11 is a composite material including resin and glass fiber.

[0215] The reinforcing plate 30 is connected to the bottom plate 112, and the reinforcing plate 30 includes a first structure layer 31, a third structure layer 33, and a second structure layer 32 arranged in sequence. The first structure layer 31 is connected to the side of the bottom plate 112 facing the containing space 113, and the first structure layer 31 is a steel plate layer; the third structure layer 33 is connected to the side of the first structure layer 31 away from the bottom plate 112, and the third structure layer 33 is a foam layer; the second structure layer 32 is connected to the side of the third structure layer 33 away from the first structure layer 31, and the second structure layer 32 is a composite material layer, and the material of the second structure layer 32 is the same as that of the first box body 11.

[0216] The heat exchange assembly 40 is connected to the side of the second structure layer 32 facing the containing space 113.

[0217] Part of the battery monomer 21 is connected to the side of the heat exchange assembly 40 facing the containing space 113.

[0218] In a second aspect, the embodiments of the present application provide a power consumption device including the battery device 100 provided by some embodiments of the first aspect.

[0219] In the power consumption device, the battery device 100 does not have a bottom guard plate, the size of the battery device 100 in the height direction Z is small, and the space occupation of the battery device 100 is reduced; at the same time, the bottom of the battery device 100 also has good protection performance, and the risk of failure and damage of the battery device 100 is reduced.

[0220] 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 foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner 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 battery device comprises: a box body, including a first box body, the first box body comprising a frame and a bottom plate connected to the frame, the frame and the bottom plate being made of composite material, and the frame and the bottom plate forming an open-ended containing space; a battery cell contained in the containing space; a reinforcing plate connected to the bottom plate, the reinforcing plate comprising a first structural layer and a second structural layer, the first structural layer being connected to the side of the bottom plate facing the containing space, and the second structural layer being connected to the side of the first structural layer away from the bottom plate, and the battery cell being connected to the second structural layer; the strength of the first structural layer is greater than that of the second structural layer; the side of the bottom plate away from the containing space is directly exposed to the external environment; the reinforcing plate further comprises a third structural layer, the third structural layer being arranged between the first structural layer and the second structural layer, and the third structural layer being a deformation layer; the battery device further comprises a heat exchange assembly, the heat exchange assembly being arranged on the side of the reinforcing plate away from the bottom plate, and at least part of the battery cell being connected to the side of the heat exchange assembly away from the reinforcing plate.

2. The battery device according to claim 1, characterized by The material of the first structural layer comprises metal.

3. The battery device of claim 1, wherein The strength of the first structural layer ranges from 300 MPa to 1500 MPa.

4. The battery device of claim 1, wherein The material of the second structural layer comprises composite material.

5. The battery device of claim 4, wherein The material of the second structural layer comprises resin and fiber.

6. The battery device of claim 1, wherein The material of the third structural layer comprises at least one of rubber, foam, and foaming glue.

7. The battery device of claim 1, wherein The third structural layer is provided with a cavity.

8. The battery device of claim 7, wherein, The side of the bottom plate facing the containing space is provided with a first containing groove; part of the reinforcing plate is contained in the first containing groove, and a second containing groove is formed on the side of the reinforcing plate away from the first containing groove, and the heat exchange assembly is contained in the second containing groove.

9. The battery device of claim 8, wherein, The side of the heat exchange assembly facing the containing space is flush with the side of the reinforcing plate facing the containing space.

10. The battery device of claim 1, wherein, At least part of the heat exchange assembly protrudes from the side of the reinforcing plate facing the containing space; at least part of the battery cell is connected to the side of the heat exchange assembly away from the reinforcing plate, so that the battery cell is arranged in a spaced manner with the reinforcing plate.

11. The battery device of any one of claims 1-7, wherein, The frame and the bottom plate are integrally formed.

12. The battery device of any one of claims 1-7, wherein, The material of the frame and the bottom plate comprises resin and fiber.

13. The battery device of any one of claims 1-7, wherein, The side of the frame away from the containing space is connected with a beam body.

14. The battery device of claim 13, wherein, The material of the beam body comprises metal.

15. An electrical device, comprising: The battery device comprises any one of claims 1-14.

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