Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a bottom protection plate, the bottom protection plate comprises a first rigid plate and a second rigid plate, and the first rigid plate is connected to the box body; the buffer layer is clamped and fixed by the first rigid plate and the second rigid plate; the first buffer material piece is arranged on the side, facing the first rigid plate, of the second rigid plate, and / or the first buffer material piece is arranged on the side, back to the first rigid plate, of the second rigid plate, and the first buffer material piece is a polyurea material piece. According to the bottom protection plate, the second rigid plate is located at the bottom of the box body, the first buffering material piece is arranged on the second rigid plate, when the second rigid plate is impacted and collided, the first buffering material piece firstly conducts buffering and energy absorption, then weakened impact force collides with the buffering layer, and the anti-impact buffering capacity of the bottom protection plate can be improved; the battery monomers in the box body are not easy to deform and damage due to extrusion, and the second rigid plate is not easy to damage. And on the other hand, the first buffer material piece can also play an anti-corrosion role on the second rigid plate.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] The battery device includes a box body and a bottom guard plate at the bottom of the box body, and the bottom guard plate can protect the box body from impact. The related art proposes a battery device, in which the bottom guard plate has a weak anti-impact buffering ability, and the battery cells inside the box body are easily squeezed and deformed and damaged. Utility Model Content

[0003] In view of the above problems, the present application provides a battery device and an electrical device, wherein the battery device is provided with a first buffer material piece, which can improve the buffering and energy absorption effect of the bottom guard plate.

[0004] In order to solve the above-mentioned technical problems, a technical solution adopted in the present application is to provide a battery device, which includes a box body and a bottom guard plate, and the bottom guard plate includes: a first rigid plate and a second rigid plate, the second rigid plate is arranged opposite to the first rigid plate, and the first rigid plate is connected to the box body; a buffer layer, the buffer layer is clamped and fixed by the first rigid plate and the second rigid plate; a first buffer material piece, the first buffer material piece is arranged on the side of the second rigid plate facing the first rigid plate, and / or the first buffer material piece is arranged on the side of the second rigid plate facing away from the first rigid plate, and the first buffer material piece is a polyurea material piece.

[0005] As mentioned above, after the bottom guard plate is connected to the box body, the second rigid plate is located at the bottom of the box body, and the first buffer material is arranged on the second rigid plate. When the second rigid plate is impacted and collided, the first buffer material firstly buffers and absorbs energy, and then the weakened impact force collides with the buffer layer, which can improve the impact resistance and buffering capacity of the bottom guard plate, and the battery cells inside the box body are not easily damaged by extrusion deformation, and the second rigid plate itself is not easily damaged. On the other hand, the first buffer material can also play a role in corrosion prevention for the second rigid plate.

[0006] In a possible implementation manner, the first buffer material piece is a layered structure and is laid flat on the second rigid plate.

[0007] As described above, the first buffer material piece can evenly cover the second rigid plate, and can play a role in buffering and absorbing energy when any part of the second rigid plate is impacted or collided.

[0008] In a possible implementation manner, the thickness of the first buffer material piece ranges from 0.3 mm to 2 mm.

[0009] The first buffer material piece with the above thickness can play a good role in impact resistance and buffering.

[0010] In a possible implementation, the thickness range of the first buffer material member is from 0.3 mm to 1 mm.

[0011] The above is a more optimal thickness range of the first buffer material member.

[0012] In a possible implementation, the buffer layer includes a plurality of hollow spheres.

[0013] As described above, the buffer layer has hollow spheres, and the buffer layer can play a role in buffering and energy absorption.

[0014] In a possible implementation, the buffer layer further includes: a second buffer material member, the second buffer material member is a layered structure, and is clamped and fixed by the first rigid plate and the second rigid plate, and each of the hollow spheres is located inside the second buffer material member.

[0015] As described above, the surface of the hollow sphere has a second buffer material member, which can improve the buffer and energy absorption effect of the buffer layer and improve the protection effect of the protection plate.

[0016] In a possible implementation, the diameter range of the hollow spheres is from 0.8 mm to 1 mm; the thickness of the second buffer material member is greater than the diameter of the hollow spheres.

[0017] As described above, the second buffer material member can completely cover the surface of the hollow sphere, improving the buffer and energy absorption effect of the hollow sphere.

[0018] In a possible implementation, the second buffer material member is one of a polyurea material member, a polyurethane material member, and an epoxy material member.

[0019] The above types of second buffer material members all have good buffer and energy absorption characteristics.

[0020] In a possible implementation, the bottom protection plate further includes: an adhesive layer, and the first rigid plate is connected to the second buffer material member through the adhesive layer.

[0021] As described above, by providing the adhesive layer, the adhesion between the first rigid plate and the second buffer material member can be improved.

[0022] In a possible implementation, the adhesive layer is an electrophoretic paint layer.

[0023] As described above, the electrophoretic paint layer can bond the first rigid plate and the second buffer material member together.

[0024] In a possible implementation, the thickness range of the adhesive layer is from 30 μm to 60 μm.

[0025] The adhesive layer with the above thickness has a good adhesion effect.

[0026] To solve the above technical problems, another technical solution adopted in this application is to provide an electric device, which includes a battery device. The battery device is the above-mentioned battery device and is used to provide electric energy.

[0027] For the above-mentioned electric device, after the bottom guard plate is connected to the box body, the second rigid plate is located at the bottom of the box body. A first buffer material piece is arranged on the second rigid plate. When the second rigid plate is impacted and collided, the first buffer material piece first buffers and absorbs energy, and then the weakened impact force collides with the buffer layer, which can improve the impact resistance and buffering ability of the bottom guard plate. The battery cells inside the box body are not easily squeezed and deformed and damaged, and the second rigid plate itself is not easily damaged. On the other hand, the first buffer material piece can also play a role in preventing corrosion of the second rigid plate.

[0028] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the description. And in order to make the above content, other purposes, features and advantages of this application more obvious and understandable, the following specifically gives the specific implementation manners of this application. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0030] Figure 1 It is a schematic structural diagram of a vehicle according to one or more embodiments of this application;

[0031] Figure 2 It is a schematic structural diagram of a battery cell according to one or more embodiments of this application;

[0032] Figure 3 It is a schematic structural diagram of a bottom guard plate according to one or more embodiments of this application;

[0033] Figure 4 For Figure 3 A partially enlarged schematic diagram of the bottom guard plate.

[0034] Wherein, 1000, vehicle; 200, controller; 300, motor; 100, battery device; 110, battery cell; 10, bottom guard plate; 11, first rigid plate; 12, second rigid plate; 121, first buffer material piece; 131, hollow sphere; 132, second buffer material piece; 13, buffer layer. Detailed implementation manners

[0035] Hereinafter, embodiments of the technical solution of the present application will be described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and thus are only examples and should not be used to limit the protection scope of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise specifically defined, the term "plurality" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0038] Referring to "embodiments" herein means that a specific feature, structure or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0040] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0041] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0042] At present, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also constantly increasing.

[0043] Among them, the battery device includes a box body and a bottom protection plate located at the bottom of the box body. The bottom protection plate can play a role in protecting the box body against impact. The related technology proposes a battery device. In the related technology, the bottom protection plate has the problem of weak anti-impact buffering ability, and the battery cells inside the box body are easily deformed and damaged by extrusion.

[0044] Based on the above considerations, in order to solve the technical problem that the bottom protection plate in the prior art has weak anti-impact buffering ability and the battery cells inside the box body are easily deformed and damaged by extrusion, the present application proposes a battery device and an electrical device. The bottom protection plate of the battery device is provided with a first buffer material piece, which can improve the buffer energy absorption effect of the bottom protection plate.

[0045] For the convenience of description in the following embodiments, a vehicle as an electrical device in an embodiment of the present application is taken as an example for description.

[0046] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

[0047] The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0048] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0049] To improve the performance of the electrical device, the present application provides a battery device and an electrical device. Please refer to Figure 3 and Figure 4 , Figure 3 which is a schematic structural diagram of a bottom guard plate according to one or more embodiments of the present application; Figure 4 is Figure 3 a partially enlarged schematic diagram of the structure of the bottom guard plate.

[0050] In some embodiments, the battery device 100 includes a box body (not shown) and a bottom guard plate 10. The bottom guard plate 10 includes a first rigid plate 11, a second rigid plate 12, a buffer layer 13, and a first buffer material member 121. The second rigid plate 12 is disposed opposite to the first rigid plate 11, and the first rigid plate 11 is connected to the box body; the buffer layer 13 is clamped and fixed by the first rigid plate 11 and the second rigid plate 12; the first buffer material member 121 is disposed on the side of the second rigid plate 12 facing the first rigid plate 11, and / or the first buffer material member 121 is disposed on the side of the second rigid plate 12 facing away from the first rigid plate 11, and the first buffer material member 121 is a polyurea material member.

[0051] The box body has an accommodating space. The battery device 100 further includes one or more battery cells 110. Please refer to Figure 2 , Figure 2Schematic diagram of the structure of a battery cell according to one or more embodiments of the present application. The battery cell 110 is located in the accommodating space. Multiple battery cells 110 can be connected in series, parallel, or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among multiple battery cells 110. Multiple battery cells 110 can be directly connected in series, parallel, or in a hybrid connection together, and then the whole formed by multiple battery cells 110 is located in the accommodating space. Of course, it can also be that multiple battery cells 110 are first connected in series, parallel, or in a hybrid connection to form a battery module form, and then multiple battery modules are connected in series, parallel, or in a hybrid connection to form a whole and are located in the accommodating space. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component (not shown) for realizing the electrical connection among multiple battery cells 110. Among them, the bottom guard plate 10 is located at the bottom of the box body of the battery device 100, so that when the vehicle 1000 encounters a severe impact or abrasion at the bottom during driving, the bottom guard plate 10 can resist and relieve the impact and reduce the deformation and damage of the battery device 100. Among them, the first rigid plate 11 and the second rigid plate 12 are located on the outer layer to directly bear the external impact and provide the bottom guard plate 10 with high strength, high stiffness, and anti-deformation ability. In this embodiment, the manufacturing materials of the first rigid plate 11 and the second rigid plate 12 are DP950, which is a high-strength dual-phase steel with the characteristics of high strength, light weight, and good collision energy absorption effect. In some other embodiments, the first rigid plate 11 and the second rigid plate 12 can also be made of other types of steel, aluminum, metal materials with higher modulus, or fiber-reinforced materials with higher modulus. The buffer layer 13 is clamped and fixed by the first rigid plate 11 and the second rigid plate 12. The buffer layer 13 deforms along its own thickness direction under the impact action to absorb the impact energy and can relieve the impact force, so that the bottom guard plate 10 has an energy absorption effect. The first buffer material member 121 is located on the second rigid plate 12. The first buffer material member 121 has energy absorption and buffering characteristics. When the bottom guard plate 10 is impacted, the first buffer material member 121 can first absorb and buffer the impact and improve the energy absorption and anti-impact effects of the bottom guard plate 10. In this embodiment, the first buffer material members 121 are arranged on both sides of the second rigid plate 12. In some other embodiments, the first buffer material member 121 can be arranged on the side of the second rigid plate 12 facing the first rigid plate 11. In some other embodiments, the first buffer material member 121 can also be arranged on the side of the second rigid plate 12 facing away from the first rigid plate 11. In addition, in this embodiment, the first rigid plate 11 and the second rigid plate 12 are arranged opposite to each other and clamp and fix the buffer layer 13. The first rigid plate 11 and the second rigid plate 12 are fixed by FDS (Flow Drill Screw) method. In some other embodiments, the first rigid plate 11 and the second rigid plate 12 can also be fixed by other methods such as electric welding and rivets.

[0052] As described above, after the bottom guard plate 10 is connected to the box body, the second rigid plate 12 is located at the bottom of the box body. A first buffer material member 121 is provided on the second rigid plate 12. When the second rigid plate 12 is impacted, the first buffer material member 121 first buffers and absorbs energy, and then the weakened impact force impacts the buffer layer 13, which can improve the impact buffering ability of the bottom guard plate 10. The battery cells 110 inside the box body are not easily squeezed and deformed, and the second rigid plate 12 itself is not easily damaged. On the other hand, the first buffer material member 121 can also play a role in preventing corrosion of the second rigid plate 12.

[0053] In some embodiments, the first buffer material member 121 has a layered structure and is laid flat on the second rigid plate 12.

[0054] In this embodiment, the first buffer material member 121 has a layered structure. The first buffer material member 121 is laid flat on both sides of the second rigid plate 12. In addition, the first buffer material member 121 is laid flat on the entire surface on both sides of the second rigid plate 12. In some other embodiments, the first buffer material member 121 can also be laid flat in partial areas on both sides of the second rigid plate 12. In addition, the number of the first buffer material members 121 on each side of the second rigid plate 12 can be one or more. When the number of the first buffer material members 121 on each side of the second rigid plate 12 is multiple, the first buffer material members 121 can be connected or arranged at intervals. In some other embodiments, the first buffer material member 121 can also be a hollow structure, a block structure, a spherical structure, etc.

[0055] As described above, the first buffer material member 121 can evenly cover the second rigid plate 12, and can play a role in buffering and absorbing energy when the second rigid plate 12 is impacted everywhere.

[0056] In some embodiments, the thickness range of the first buffer material member 121 is 0.3 mm to 2 mm.

[0057] In this embodiment, the thickness of the first buffer material member 121 is 0.3 mm. In some other embodiments, the thickness of the first buffer member can also be other reasonable thicknesses such as 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, etc. In addition, in this embodiment, the thicknesses of the first buffer material members 121 on both sides of the second rigid plate 12 are the same. In some other embodiments, the thicknesses of the first buffer material members 121 on both sides of the second rigid plate 12 can also be different.

[0058] The first buffer material member 121 with the above thickness can play a good role in anti-impact and buffering.

[0059] In some embodiments, the thickness of the first buffer material member 121 ranges from 0.3 millimeters to 1 millimeter. For example, the thickness of the first buffer material member 121 can be 0.3 millimeters, 0.5 millimeters, 0.8 millimeters, 1 millimeter, etc.

[0060] The above is a more optimal thickness range of the first buffer material member 121, which can enable the first buffer material member 121 to better play the role of shock resistance and buffering.

[0061] In this embodiment, the first buffer material member 121 is a polyurea material member, and the first buffer material member 121 is disposed on both sides of the second rigid plate 12 by spraying. In some other embodiments, the first buffer material member 121 can also be a polyurethane material member or an epoxy material member. In some other embodiments, the first buffer material member 121 can also be a mixture of a polyurea material member and a polyurethane material member, or a mixture of a polyurethane material member and an epoxy material member, or a mixture of a polyurea material member and an epoxy material member. The first buffer material member 121 can also be a mixture of a polyurea material member, a polyurethane material member, and an epoxy material member. In some other embodiments, the first buffer material member 121 can also be other material members with energy absorption and buffering properties such as a silicone rubber member, an expanded polypropylene member, a hydrogel member, etc.

[0062] The first buffer material members 121 of the above types all have good buffering and energy absorption characteristics.

[0063] In some embodiments, the buffer layer 13 includes a plurality of hollow spheres 131.

[0064] The hollow spheres 131 have deformation performance. When the bottom guard plate 10 is impacted, the hollow spheres 131 can absorb energy and buffer through deformation. In this embodiment, energy absorption and buffering are performed through the hollow spheres 131. In some other embodiments, the buffer layer 13 can also include hollow bodies such as hollow rectangular bodies, hollow frustum bodies, hollow irregular polygons, etc., which can also enable the buffer layer 13 to play the role of buffering and energy absorption. Additionally, in this embodiment, the hollow spheres 131 in the buffer layer 13 are arranged in a single layer. In some other embodiments, the hollow spheres 131 in the buffer layer 13 can also be arranged in multiple layers.

[0065] As described above, the buffer layer 13 has the hollow spheres 131, and the buffer layer 13 can play the role of buffering and energy absorption.

[0066] In some embodiments, the buffer layer 13 further includes: a second buffer material member 132, the second buffer material member 132 is a layered structure and is clamped and fixed by the first rigid plate 11 and the second rigid plate 12, and each hollow sphere 131 is located inside the second buffer material member 132.

[0067] The second buffer material piece 132 also has the function of buffering and energy absorption. By covering the surface of the hollow sphere 131 with the second buffer material piece 132, the buffering and energy absorption effect of the hollow sphere 131 can be improved. When the second rigid plate 12 of the bottom guard plate 10 is impacted, the first buffer material piece 121 first buffers and absorbs energy, and then the weakened impact force collides with the buffer layer 13. The hollow sphere 131 and the second buffer material piece 132 of the buffer layer 13 continue to buffer and absorb energy, which can improve the impact resistance and buffering ability of the bottom guard plate 10. The battery cell 110 inside the box is not easily damaged by extrusion and deformation, and the second rigid plate 12 itself is not easily damaged.

[0068] As described above, the surface of the hollow sphere 131 is provided with the second buffer material piece 132, which can improve the buffering and energy absorption effect of the buffer layer 13 and the protection effect of the protection plate.

[0069] In some embodiments, the diameter range of the hollow sphere 131 is 0.8 mm to 1 mm; the thickness of the second buffer material piece 132 is greater than the diameter of the hollow sphere 131.

[0070] In this embodiment, the diameter of the hollow sphere 131 is 0.8 mm. In some other embodiments, the diameter of the hollow sphere 131 can also be reasonable sizes such as 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, etc. Additionally, in this embodiment, the thickness of the second buffer material piece 132 is 0.2 mm greater than the diameter of the hollow sphere 131. In some other embodiments, the thickness of the second buffer material piece 132 can also be 0.1 mm, 0.3 mm, etc. greater than the diameter of the hollow sphere 131.

[0071] As described above, the second buffer material piece 132 can completely cover the surface of the hollow sphere 131 to improve the buffering and energy absorption effect of the hollow sphere 131.

[0072] In some embodiments, the second buffer material piece 132 is one of a polyurea material piece, a polyurethane material piece, and an epoxy material piece.

[0073] In this embodiment, the second buffer material piece 132 is a polyurea material piece. In some other embodiments, the second buffer material piece 132 can also be a polyurethane material piece or an epoxy material piece. In some other embodiments, the second buffer material piece 132 can also be a mixture of a polyurea material piece and a polyurethane material piece, or a mixture of a polyurethane material piece and an epoxy material piece, or a mixture of a polyurea material piece and an epoxy material piece. The second buffer material piece 132 can also be a mixture of a polyurea material piece, a polyurethane material piece, and an epoxy material piece. In some other embodiments, the second buffer material piece 132 can also be other material pieces with energy absorption and buffering properties such as a silicone rubber piece, an expanded polypropylene piece, and a hydrogel piece.

[0074] The second buffer material pieces 132 of the above type all have good buffer energy absorption characteristics.

[0075] In some embodiments, the bottom guard plate 10 further includes an adhesive layer (not shown), and the first rigid plate 11 is connected to the second buffer material piece 132 through the adhesive layer.

[0076] In this embodiment, the adhesive layer is an electrophoretic paint layer, and the electrophoretic paint layer can improve the surface adhesion of the first rigid plate 11, so that the first rigid plate 11 is fixed on the second buffer material piece 132 of the buffer layer 13. In some other embodiments, the adhesive layer can also be a phosphating film layer, a silane conversion film layer, etc.

[0077] As described above, by providing the adhesive layer, the adhesion between the first rigid plate 11 and the second buffer material piece 132 can be improved.

[0078] In some embodiments, the thickness range of the adhesive layer is 30 microns to 60 microns.

[0079] In this embodiment, the thickness of the adhesive layer is 30 microns. In some other embodiments, the thickness of the adhesive layer can also be reasonable thicknesses such as 35 microns, 40 microns, 50 microns, 60 microns, etc.

[0080] The adhesive layer with the above thickness has a good adhesion effect.

[0081] Correspondingly, the present application also proposes an electrical device, which includes a battery device 100. The battery device 100 is the battery device 100 in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0082] In the above electrical device, after the bottom guard plate 10 is connected to the box body, the second rigid plate 12 is located at the bottom of the box body. A first buffer material piece 121 is provided on the second rigid plate 12. When the second rigid plate 12 is impacted and collided, the first buffer material piece 121 first buffers and absorbs energy, and then the weakened impact force collides with the buffer layer 13, which can improve the impact buffer ability of the bottom guard plate 10. The battery cells 110 inside the box body are not easily squeezed and deformed and damaged, and the second rigid plate 12 itself is not easily damaged. On the other hand, the first buffer material piece 121 can also play a role in preventing corrosion of the second rigid plate 12.

[0083] Finally, in a specific application scenario, for the problem that the bottom guard plate 10 of the existing battery device 100 has weak anti-impact and buffering capabilities, and the battery cells 110 inside the box body are easily deformed and damaged due to extrusion. The battery device 100 of the present application includes a box body and a bottom guard plate 10, and the bottom guard plate 10 includes: a first rigid plate 11 and a second rigid plate 12, the second rigid plate 12 is disposed opposite to the first rigid plate 11, and the first rigid plate 11 is connected to the box body; a buffer layer 13, the buffer layer 13 is clamped and fixed by the first rigid plate 11 and the second rigid plate 12; a first buffer material member 121, the first buffer material member 121 is disposed on one side of the second rigid plate 12 facing the first rigid plate 11 and on one side of the second rigid plate 12 facing away from the first rigid plate 11. The first buffer material member 121 is a layered structure and is laid flat on the second rigid plate 12. The thickness of the first buffer material member 121 is 0.3 millimeters. The first buffer material member 121 is a polyurea material member. The buffer layer 13 includes a plurality of hollow spheres 131. The buffer layer 13 further includes a second buffer material member 132, the second buffer material member 132 is a layered structure and is clamped and fixed by the first rigid plate 11 and the second rigid plate 12, and each of the hollow spheres 131 is located inside the second buffer material member 132. The second buffer material member 132 is a polyurea material member.

[0084] In the above manner, after the bottom guard plate 10 is connected to the box body, the second rigid plate 12 is located at the bottom of the box body, and the first buffer material member 121 is provided on the second rigid plate 12. When the second rigid plate 12 is impacted and collided, the first buffer material member 121 first buffers and absorbs energy, and then the weakened impact force collides with the buffer layer 13, which can improve the anti-impact and buffering capabilities of the bottom guard plate 10. The battery cells 110 inside the box body are not easily deformed and damaged due to extrusion, and the second rigid plate 12 itself is not easily damaged. On the other hand, the first buffer material member 121 can also play a role in anti-corrosion for the second rigid plate 12.

[0085] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises a box body and a bottom guard plate, and the bottom guard plate comprises: A first rigid plate and a second rigid plate, wherein the second rigid plate is arranged opposite to the first rigid plate, and the first rigid plate is connected to the box body; a buffer layer, wherein the buffer layer is clamped and fixed by the first rigid plate and the second rigid plate; A first buffer material piece, wherein the first buffer material piece is arranged on a side of the second rigid plate facing the first rigid plate, and / or the first buffer material piece is arranged on a side of the second rigid plate facing away from the first rigid plate, and the first buffer material piece is a polyurea material piece.

2. The battery device according to claim 1, characterized in that: The first buffer material piece is a layered structure and is laid flat on the second rigid plate.

3. The battery device according to claim 2, characterized in that: The thickness of the first buffer material piece ranges from 0.3 mm to 2 mm.

4. The battery device according to claim 3, characterized in that: The thickness of the first buffer material piece ranges from 0.3 mm to 1 mm.

5. The battery device according to claim 1, characterized in that: The buffer layer includes a plurality of hollow spheres.

6. The battery device according to claim 5, characterized in that: The buffer layer further comprises: The second cushioning material piece is a layered structure and is clamped and fixed by the first rigid plate and the second rigid plate. Each of the hollow spheres is located inside the second cushioning material piece.

7. The battery device according to claim 6, characterized in that: The diameter of the hollow sphere ranges from 0.8 mm to 1 mm; The thickness of the second buffer material piece is greater than the diameter of the hollow sphere.

8. The battery device according to claim 6, characterized in that: The second buffer material piece is one of a polyurea material piece, a polyurethane material piece, and an epoxy material piece.

9. The battery device according to claim 6, characterized in that: The bottom guard plate also includes: An adhesive layer, through which the first rigid plate is connected to the second buffer material piece.

10. The battery device according to claim 9, characterized in that: The adhesive layer is an electrophoretic paint layer.

11. The battery device according to claim 10, characterized in that: The thickness of the adhesive layer ranges from 30 micrometers to 60 micrometers.

12. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 11, and the battery device is used to provide electrical energy.

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