Battery device and vehicle

Abstract

The utility model discloses a kind of battery device and vehicle, battery device includes: box body subassembly and battery monomer, box body subassembly includes box body and protection structure, protection structure is located at the outside of box body and protrudes from the outer surface of box body, at least part of protection structure is flexible structure, battery monomer is located in box body.According to the battery device of the utility model, when battery device is impacted by external force, protection structure can be used as the first line of defense, prior to box body, first resist the impact and extrusion of external force, so as to be able to play a protective role to box body, indirectly improve the protection effect of box body to battery monomer, improve the safety of battery device, prolong the service life of battery device, and, when protection structure is deformed by external force impact, user can judge the damaged position of battery device by observing the deformation condition of protection structure, so as to reduce the maintenance difficulty of box body subassembly, improve the maintenance efficiency of battery device.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery device and vehicle. Background Technology

[0002] In related technologies, battery devices are usually used in vehicles. During vehicle operation, battery devices are easily subjected to external impacts, but the specific location of damage to the battery device cannot be well observed, thus affecting the maintenance efficiency of the battery device. Utility Model Content

[0003] In view of the above problems, this utility model provides a battery device that can protect the housing, reduce the risk of housing deformation or damage, improve the protection effect of the housing for individual battery cells, improve the safety of the battery device, and determine the damaged location of the battery device by observing the deformation of the protective structure, thereby reducing the maintenance difficulty of the housing components and improving the maintenance efficiency of the battery device.

[0004] In a first aspect, the present invention provides a battery device, comprising: a housing assembly, including a housing and a protective structure, wherein the protective structure is disposed on the outside of the housing and protrudes from the outer surface of the housing, and at least a portion of the protective structure is a flexible structure; and a battery cell disposed within the housing.

[0005] In the above technical solution, the housing assembly includes a housing and a protective structure. The protective structure is located on the outside of the housing and protrudes from the outer surface of the housing. At least part of the protective structure is a flexible structure. When the battery device is impacted by external force, the protective structure can act as the first line of defense, taking precedence over the housing and resisting the impact and compression of external force first. This can protect the housing and indirectly improve the protective effect of the housing on the individual battery cells, improve the safety of the battery device, and extend the service life of the battery device. Furthermore, when the protective structure is deformed by external force, the user can determine the damaged location of the battery device by observing the deformation of the protective structure, thereby reducing the maintenance difficulty of the housing assembly and improving the maintenance efficiency of the battery device.

[0006] In some embodiments, the protective structure and the housing are both independently molded parts.

[0007] In the above technical solution, by making the protective structure and the box body independent molded parts, and then assembling the protective structure onto the box body after processing and molding, the processing and molding process difficulty can be reduced compared to the protective structure and the box body being molded as one piece. Furthermore, the protective structure can be installed at different positions on the box body as needed, making it more flexible.

[0008] In some embodiments, the protective structure is bonded and fixed to the housing.

[0009] In the above technical solution, the protective structure is bonded and fixed to the box, which is simple to operate and easy to install. It can reduce the assembly difficulty of the protective structure, improve the bonding strength between the protective structure and the box, and reduce the risk of the protective structure falling off the box.

[0010] In some embodiments, the protective structure is detachably fixed to the housing.

[0011] In the above technical solution, by detachably connecting the protective structure to the enclosure, the assembly and disassembly between the protective structure and the enclosure can be facilitated, thereby improving the assembly efficiency and maintenance efficiency between the protective structure and the enclosure. For example, when the protective structure is damaged, the protective structure can be replaced instead of replacing the entire enclosure assembly, thus reducing the maintenance cost of the enclosure assembly.

[0012] In some embodiments, the protective structure includes at least one of a polymer component and a metal component.

[0013] In the above technical solution, by including at least one of polymer parts and metal parts in the protective structure, the good plasticity of polymer materials or the good plasticity and toughness of metal materials can be utilized to make the protective structure have good flexibility.

[0014] In some embodiments, at least a portion of the protective structure is located at the lower part of the enclosure.

[0015] In the above technical solution, by making at least part of the protective structure located at the bottom of the box, it is possible to protect the areas of the box that are susceptible to impact, reduce the probability of box deformation or damage, improve the reliability of the box, and thus improve the protective effect of the box on the battery cells and improve the safety of the battery device.

[0016] In some embodiments, at least a portion of the protective structure is disposed on the bottom surface of the enclosure.

[0017] In the above technical solution, by making at least part of the protective structure located on the bottom surface of the box, the bottom surface of the box can be reinforced for protection, reducing the probability of deformation or damage to the bottom surface of the box, thereby improving the reliability of the box, extending the service life of the box, improving the protection effect of the box for individual battery cells, and improving the safety of the battery device.

[0018] In some embodiments, the protective structure includes a plurality of energy-absorbing parts spaced apart, wherein the energy-absorbing parts are flexible structures.

[0019] In the above technical solution, the protective structure includes multiple energy-absorbing parts arranged at intervals. The energy-absorbing parts are flexible structures. When the protective structure is impacted by external force, the space between the spaced energy-absorbing parts can provide deformation space for the energy-absorbing parts to deform, which can better meet the deformation requirements of the energy-absorbing parts. This allows the energy-absorbing parts to disperse and absorb impact energy through their own deformation, thereby improving the protective effect of the protective structure on the box and battery cells.

[0020] In some embodiments, the energy-absorbing part is a columnar structure or a sheet-like structure.

[0021] In the above technical solution, the energy-absorbing part is a columnar or sheet-like structure, which can make the energy-absorbing part more flexible. When the energy-absorbing part is subjected to external impact, it can absorb the impact energy better through deformation. The sheet-like structure of the energy-absorbing part can generate a large in-plane deformation, thereby absorbing more impact energy and improving the protective effect of the protective structure on the enclosure.

[0022] In some embodiments, at least a portion of the energy-absorbing portion has a first surface and a second surface disposed opposite to each other, at least one of the first surface and the second surface being formed with a guide surface that extends obliquely downward in a direction from the root of the energy-absorbing portion to the free end of the energy-absorbing portion.

[0023] In the above technical solution, by having a guiding surface in at least part of the energy-absorbing part, and the guiding surface extending downward at an angle from the root of the energy-absorbing part to the free end of the energy-absorbing part, firstly, it can play a shielding role, reducing the probability of liquids, dust, sludge and other impurities directly contacting the housing; secondly, it can play a guiding role, reducing the accumulation of liquids, dust and other impurities on the surface of the energy-absorbing part, which is conducive to keeping the surface of the energy-absorbing part dry and clean; thirdly, it can be used to decompose the vertical impact force, reducing the damage to the housing and the battery components inside by the vertical impact force, and improving the protective effect of the protective structure on the housing and battery cells.

[0024] In some embodiments, the angle between the guide surface and the vertical direction is A, where A satisfies: 15°≤A≤85°.

[0025] In the above technical solution, by limiting the angle A between the guide surface and the vertical direction to satisfy: 15°≤A≤85°, the energy absorption effect of the energy absorption part and the decomposition effect of the impact force in the vertical direction can be balanced and coordinated, thereby improving the protection effect of the protective structure on the box and battery cells.

[0026] In some embodiments, at least a portion of the protective structure is located on the bottom surface of the housing, and at least a portion of the energy-absorbing portion located on the bottom surface of the housing has the guide surface. The battery device is used in a vehicle, and the guide surface extends obliquely toward the rear of the vehicle in a direction from the root of the energy-absorbing portion to the free end of the energy-absorbing portion.

[0027] In the above technical solution, by defining at least a portion of the energy-absorbing part located on the bottom surface of the housing as having a guide surface, and extending the guide surface at an angle towards the rear of the vehicle in the direction from the root of the energy-absorbing part to the free end of the energy-absorbing part, the extension direction of the guide surface can be made to conform to the airflow direction, thereby reducing turbulence and eddies generated at the battery device when the airflow is flowing, reducing noise generation, effectively reducing noise level, and improving the performance and environmental friendliness of the battery device.

[0028] In some embodiments, the multiple energy-absorbing parts located on the same side of the housing are divided into multiple energy-absorbing groups, and each energy-absorbing group includes multiple energy-absorbing parts arranged at intervals.

[0029] In the above technical solution, by dividing multiple energy-absorbing parts located on the same side of the box into multiple energy-absorbing groups, and by spacing the multiple energy-absorbing parts in each energy-absorbing group apart, the gap between the multiple energy-absorbing parts can be increased to meet the deformation requirements of the energy-absorbing parts.

[0030] In some embodiments, the energy-absorbing portions of two adjacent energy-absorbing groups are staggered.

[0031] In the above technical solution, the energy-absorbing parts of two adjacent energy-absorbing groups are staggered, which can reserve more deformation space around each energy-absorbing part, better meet the deformation requirements of the energy-absorbing part, and thus improve the energy absorption efficiency of the protective structure.

[0032] In some embodiments, at least a portion of the protective structure is located on the bottom surface of the housing, and a plurality of energy-absorbing groups located on the bottom surface of the housing are arranged along the width direction of the housing, each energy-absorbing group including a plurality of energy-absorbing parts spaced apart along the length direction of the housing.

[0033] In the above technical solution, multiple energy-absorbing groups on the bottom surface of the box are arranged along the width direction of the box, and multiple energy-absorbing parts of each energy-absorbing group are arranged along the length direction of the box. This allows the energy-absorbing parts to be evenly distributed in multiple directions, so that the energy-absorbing parts at adjacent positions can work together to reduce local stress concentration when subjected to impact.

[0034] In some embodiments, the protective structure further includes a base portion fixed to the outer wall of the housing, and a plurality of energy-absorbing portions are disposed on the base portion and located on the side of the base portion opposite to the housing.

[0035] In the above technical solution, the protective structure also includes a base part, which is fixed to the outer wall of the box. Multiple energy-absorbing parts are provided on the base part and located on the side of the base part away from the box. The base part can disperse the stress borne by the energy-absorbing parts to a larger area, reduce local stress concentration, improve the service life and energy absorption efficiency of the energy-absorbing parts. In addition, the base part can realize the indirect fixation of multiple energy-absorbing parts to the outer wall of the box, reduce the connection difficulty between multiple energy-absorbing parts and the box, and improve the assembly efficiency of the protective structure.

[0036] In some embodiments, the base portion includes a plurality of sub-base portions, each of the sub-base portions being an independently molded part, and the plurality of energy-absorbing portions being distributed on the plurality of sub-base portions.

[0037] In the above technical solution, the base part includes multiple sub-base parts, each of which is an independently molded part. Multiple energy-absorbing parts are distributed on multiple sub-base parts, which can reduce the manufacturing and processing difficulty of the base part, reduce the assembly difficulty of the protective structure, and improve the manufacturing and processing efficiency of the protective structure.

[0038] In some embodiments, the sub-base portion is elongated.

[0039] In the above technical solution, the sub-base part is elongated, which facilitates the installation and fixation of the sub-base part. After multiple elongated sub-base parts are combined, they can support each other to form a more stable structural system, thereby improving the overall structural strength and rigidity of the base part.

[0040] Secondly, this utility model provides a vehicle that includes the aforementioned battery device.

[0041] In the above technical solution, by providing the aforementioned battery device, the housing assembly includes a housing and a protective structure. The protective structure is located on the outside of the housing and protrudes from the outer surface of the housing. At least part of the protective structure is a flexible structure. When the battery device is impacted by external force, the protective structure can act as the first line of defense, taking precedence over the housing and resisting the impact and compression of external force first. This can protect the housing and indirectly improve the protective effect of the housing on the individual battery cells, improve the safety of the battery device, and extend the service life of the battery device. Furthermore, when the protective structure is deformed by external force, the user can determine the damaged location of the battery device by observing the deformation of the protective structure, thereby reducing the maintenance difficulty of the housing assembly and improving the maintenance efficiency of the battery device.

[0042] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0043] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 This is a bottom view schematic diagram of a battery device according to some embodiments of the present invention;

[0045] Figure 2 yes Figure 1 Enlarged view of point B in the middle;

[0046] Figure 3 It is along Figure 2 Sectional view of the middle EE line;

[0047] Figure 4 It is along Figure 2 Sectional view of the middle FF line;

[0048] Figure 5 yes Figure 1 Enlarged view of point C in the middle;

[0049] Figure 6 It is along Figure 5 A cross-sectional view of the GG line in the middle;

[0050] Figure 7 yes Figure 1 Enlarged view of point D in the middle;

[0051] Figure 8 It is along Figure 7 A cross-sectional view of the middle HH line;

[0052] Figure 9 This is a schematic diagram of a vehicle according to some embodiments of the present invention.

[0053] Figure label:

[0054] 1000, vehicles;

[0055] 100. Battery device;

[0056] 10. Enclosure assembly;

[0057] 1. Box body; 11. Bottom protective plate;

[0058] 2. Protective structure; 21. Energy-absorbing part; 210. Energy-absorbing assembly; 211. First surface; 212. Second surface; 213. Root; 214. Free end; 215. Guide surface; 22. Base part; 221. Sub-base part;

[0059] 200. Vehicle body. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0061] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0062] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0063] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0066] In this utility model, "multiple" refers to two or more (including two).

[0067] In the embodiments of this utility model, unless otherwise specified, all embodiments and optional embodiments of this utility model can be combined with each other to form new technical solutions.

[0068] In the embodiments of this utility model, unless otherwise specified, all technical features and optional technical features of this utility model can be combined with each other to form new technical solutions.

[0069] In embodiments of this invention, the battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or a combination of these cells via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly can also be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0070] The battery device can be a battery pack, which includes a housing and one or more individual battery cells housed within the housing. The individual battery cells can be battery modules, which can be housed within the housing by securing the battery modules to the housing; alternatively, multiple individual battery cells can be housed within the housing by directly securing them to the housing.

[0071] In embodiments of this invention, the housing may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing for housing individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the housing for housing individual battery cells.

[0072] In embodiments of this invention, the housing can be part of the vehicle's chassis structure. For example, a portion of the housing can be at least a part of the vehicle's floor, or a portion of the housing can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0073] In this embodiment of the invention, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment of the invention is not limited to these types. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this embodiment of the invention is not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this embodiment of the invention is not limited to these types either.

[0074] A battery cell, as the smallest energy unit of a battery device, includes a casing and electrode assemblies disposed within the casing. The electrode assemblies are the components within the battery cell where electrochemical reactions occur. The casing may contain one or more electrode assemblies. Electrode assemblies are mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode plates without active material each constitute a tab.

[0075] The positive electrode sheet may include a positive current collector and a positive electrode film layer disposed on at least one surface of the positive current collector, the positive electrode film layer including a positive electrode active material.

[0076] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive electrode film layer is disposed on either or both of the two opposite surfaces of the positive current collector.

[0077] As an example, the positive current collector can be a metal foil or a composite current collector.

[0078] The negative electrode sheet may include a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, the negative electrode film layer including a negative electrode active material.

[0079] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode film layer is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0080] As an example, the negative electrode current collector can be made of metal foil, foam metal, or composite current collector.

[0081] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0082] In related technologies, battery devices are usually used in vehicles. During vehicle operation, battery devices are easily subjected to external impacts, but the specific location of damage to the battery device cannot be well observed, thus affecting the maintenance efficiency of the battery device.

[0083] Based on this, the present invention proposes a battery device comprising: a housing assembly, including a housing and a protective structure, the protective structure being disposed on the outside of the housing and protruding from the outer surface of the housing, at least a portion of the protective structure being a flexible structure; and a battery cell disposed within the housing.

[0084] In the aforementioned battery cell, the housing assembly includes a housing and a protective structure. The protective structure is located on the outside of the housing and protrudes from the outer surface of the housing. At least part of the protective structure is a flexible structure. When the battery device is subjected to external impact, the protective structure can act as the first line of defense, taking precedence over the housing and resisting the impact and compression of the external force first. This can protect the housing and indirectly improve the protective effect of the housing on the battery cell, improve the safety of the battery device, and extend the service life of the battery device. Furthermore, when the protective structure is deformed by external impact, the user can determine the location of the damage to the battery device by observing the deformation of the protective structure, thereby reducing the maintenance difficulty of the housing assembly and improving the maintenance efficiency of the battery device.

[0085] The battery device disclosed in this embodiment can be used in electrical devices that use a battery device as a power source or in various energy storage systems that use a battery device as an energy storage element. Besides vehicles, the battery device can also be used in, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0086] The electrical device disclosed in this utility model embodiment can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery device to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs. In some embodiments of this utility model, the battery device can not only serve as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0087] The following is for reference. Figures 1-8 A battery device 100 according to an embodiment of the present invention is described.

[0088] refer to Figures 1-8 In a first aspect, the present invention provides a battery device 100 including a housing assembly 10 and a battery cell. The housing assembly 10 includes a housing 1 and a protective structure 2. The protective structure 2 is disposed on the outside of the housing 1 and protrudes from the outer surface of the housing 1. At least a portion of the protective structure 2 is a flexible structure. The battery cell is disposed inside the housing 1.

[0089] Understandably, the battery cells are housed inside the housing 1, which protects them from external impacts and pressures, reducing damage to the cells. Furthermore, the housing 1 is moisture-proof, dust-proof, and corrosion-resistant, minimizing the impact of external environmental factors on the battery cells.

[0090] Further, see attached document. Figure 1 As shown, the protective structure 2 is located on the outside of the housing 1 and protrudes from the outer surface of the housing 1. At least part of the protective structure 2 is a flexible structure. When the battery device 100 is subjected to an external impact, the protective structure 2 can act as the first line of defense, taking precedence over the housing 1 in resisting the impact and compression of the external force. This protects the housing 1 and indirectly improves the protective effect of the housing 1 on the individual battery cells, enhancing the safety of the battery device 100 and extending its service life. Furthermore, when the protective structure 2 deforms due to an external impact, the user can determine the location of the damage to the battery device 100 by observing the deformation of the protective structure 2, thereby reducing the difficulty of repairing the housing assembly 10 and improving the repair efficiency of the battery device 100. At the same time, by protecting the housing 1 with the protective structure 2, the strength requirements of the housing 1 itself can be relatively reduced. This allows for the reduction of the space occupied by the housing assembly 10 and the volume of the battery device 100 by means of reducing the wall thickness of the housing 1.

[0091] It should be noted that at least part of the protective structure 2 is a flexible structure. It can be that the entire protective structure 2 is a flexible structure, or that only part of the protective structure 2 is a flexible structure and the rest is a rigid structure.

[0092] It should be noted that the protective structure 2 is located on the outside of the box 1, and the protective structure 2 can be located on at least one of the bottom surface, side surface and top surface of the box 1.

[0093] In the above technical solution, the housing assembly 10 includes a housing 1 and a protective structure 2. The protective structure 2 is located on the outside of the housing 1 and protrudes from the outer surface of the housing 1. At least part of the protective structure 2 is a flexible structure. When the battery device 100 is impacted by an external force, the protective structure 2 can act as the first line of defense, taking precedence over the housing 1, and resisting the impact and compression of the external force first. This can protect the housing 1, indirectly improving the protective effect of the housing 1 on the battery cells, improving the safety of the battery device 100, and extending the service life of the battery device 100. Furthermore, when the protective structure 2 is deformed by an external force impact, the user can determine the damaged location of the battery device 100 by observing the deformation of the protective structure 2, thereby reducing the maintenance difficulty of the housing assembly 10 and improving the maintenance efficiency of the battery device 100.

[0094] In some embodiments, refer to the appendix Figure 1 As shown, both the protective structure 2 and the box 1 are independently molded parts.

[0095] It is understandable that both the protective structure 2 and the box 1 are manufactured separately using specific processes, without the need to combine them with other components before forming a whole. The protective structure 2 is processed and then assembled onto the box 1. Compared to the protective structure 2 being integrally formed with the box 1, this reduces the difficulty of the processing and forming process, and the protective structure 2 can be installed in different positions on the box 1 as needed, making it more flexible.

[0096] In the above technical solution, by making the protective structure 2 and the box 1 both independently molded parts, and by processing and molding the protective structure 2 before assembling it onto the box 1, the processing and molding difficulty can be reduced compared to molding the protective structure 2 and the box 1 as a whole. Furthermore, the protective structure 2 can be installed at different positions on the box 1 as needed, which is more flexible.

[0097] In some embodiments, the protective structure 2 is bonded and fixed to the housing 1.

[0098] Understandably, fixing the protective structure 2 to the housing 1 by adhesive bonding has several advantages. First, adhesive bonding is simple and easy to install, reducing the assembly difficulty of the protective structure 2 and the assembly cost of the housing assembly 10. Second, it allows a continuous adhesive layer to be formed between the protective structure 2 and the housing 1, ensuring that stress is evenly distributed across the entire adhesive layer, reducing the probability of structural fatigue and damage caused by stress concentration, improving the reliability of the housing assembly 10, and extending its service life. Third, it fills the tiny gaps between the protective structure 2 and the surface of the housing 1, increasing the contact area between them, improving the bonding strength, and reducing the risk of the protective structure 2 detaching from the housing 1.

[0099] In a specific example, see Appendix Figure 5 and attached Figure 6 As shown, the protective structure 2 includes multiple energy-absorbing parts 21 spaced apart. The energy-absorbing parts 21 are made of nylon fiber. The energy-absorbing parts 21 can be fixed to the box 1 by flocking. Utilizing the physical property that like charges repel and unlike charges attract, the energy-absorbing parts 21 are made to carry a negative charge. When the box 1 is placed under zero potential or grounded conditions, the energy-absorbing parts 21 are attracted by the box 1 with the opposite potential and rise vertically to the surface of the box 1. Since the upper surface of the box 1 is coated with adhesive, the energy-absorbing parts 21 are vertically adhered to the surface of the box 1, thereby realizing the fixed connection between the protective structure 2 and the box 1 by flocking.

[0100] In the above technical solution, the protective structure 2 is bonded and fixed to the box 1, which is simple to operate and easy to install. It can reduce the assembly difficulty of the protective structure 2, improve the bonding strength between the protective structure 2 and the box 1, and reduce the risk of the protective structure 2 falling off the box 1.

[0101] In some embodiments, the protective structure 2 is detachably fixed to the housing 1.

[0102] It is understandable that by detachably connecting the protective structure 2 to the housing 1, the assembly and disassembly of the protective structure 2 and the housing 1 can be facilitated, thereby improving the assembly efficiency and maintenance efficiency between the protective structure 2 and the housing 1. When the protective structure 2 is worn or damaged due to long-term use, only the protective structure 2 needs to be replaced, without replacing the entire housing assembly 10. This allows the housing 1 to continue to be used and reduces the maintenance cost of the housing assembly 10.

[0103] In the above technical solution, by detachably connecting the protective structure 2 to the housing 1, it is convenient to assemble and disassemble the protective structure 2 and the housing 1, thereby improving the assembly efficiency and maintenance efficiency between the protective structure 2 and the housing 1. For example, when the protective structure 2 is damaged, the protective structure 2 can be replaced without replacing the entire housing assembly 10, thus reducing the maintenance cost of the housing assembly 10.

[0104] In some embodiments, refer to the appendix Figure 1 Appendix Figure 2 Appendix Figure 5 and attached Figure 7 As shown, the protective structure 2 includes at least one of a polymer component and a metal component.

[0105] It is understood that the protective structure 2 may consist only of polymer components, only of metal components, or a combination of polymer and metal components. For example, the polymer components may be nylon fiber components, rubber components, foam components, or polyurethane components, which can reduce the weight of the protective structure 2 and contribute to the lightweighting of the battery device 100.

[0106] In the above technical solution, by including at least one of polymer parts and metal parts in the protective structure 2, the good plasticity of polymer materials or the good plasticity and toughness of metal materials can be utilized to make the protective structure 2 have good flexibility.

[0107] In some embodiments, refer to the appendix Figure 3 Appendix Figure 6 and attached Figure 8 As shown, at least a portion of the protective structure 2 is located at the lower part of the housing 1.

[0108] Understandably, when the battery device 100 is used on the vehicle 1000, the battery device 100 is generally installed at the bottom of the vehicle body 200. The lower part of the housing 1 is relatively more susceptible to impact from sand, gravel or other objects. The protective structure 2 is provided at the lower part of the housing 1, which can protect the areas of the housing 1 that are more susceptible to impact, reduce the probability of deformation or damage to the housing 1, improve the reliability of the housing 1, and thus improve the protection effect of the housing 1 on the battery cells and improve the safety of the battery device 100.

[0109] It is understood that at least a portion of the protective structure 2 is located at the lower part of the enclosure 1. Alternatively, the entire protective structure 2 may be located at the lower part of the enclosure 1, providing protection only for the lower portion of the enclosure 1. Or, a portion of the protective structure 2 may be located at the lower part of the enclosure 1, with the remainder located at the upper part, thus providing protection for different locations within the enclosure 1. It should be noted that the lower part of the enclosure 1 includes the bottom surface of the enclosure 1 and the lower portion of the side walls of the enclosure 1.

[0110] In the above technical solution, by making at least a portion of the protective structure 2 located at the lower part of the housing 1, the area of ​​the housing 1 that is susceptible to impact can be protected, reducing the probability of deformation or damage to the housing 1, improving the reliability of the housing 1, thereby improving the protective effect of the housing 1 on the battery cells and improving the safety of the battery device 100.

[0111] In some embodiments, refer to the appendix Figure 3 Appendix Figure 6 and attached Figure 8 As shown, at least a portion of the protective structure 2 is located on the bottom surface of the housing 1.

[0112] Understandably, when the battery device 100 is used on the vehicle 1000, the battery device 100 is generally installed at the bottom of the vehicle body 200. Compared with the top and sides of the housing 1, the bottom surface of the housing 1 is most likely to be impacted by sand or other objects. By providing a protective structure 2 on the bottom surface of the housing 1, the bottom surface of the housing 1 can be reinforced for protection, reducing the probability of deformation or damage to the bottom surface of the housing 1, thereby improving the reliability of the housing 1, extending the service life of the housing 1, improving the protection effect of the housing 1 on the battery cells, and improving the safety of the battery device 100.

[0113] It is understood that at least part of the protective structure 2 is located on the bottom surface of the enclosure 1. Alternatively, the entire protective structure 2 may be located on the bottom surface of the enclosure 1, providing protection only for the bottom surface of the enclosure 1. Or, part of the protective structure 2 may be located on the bottom surface of the enclosure 1, while the remaining part may be located on the side or top surface of the enclosure 1, thus providing protection for different locations of the enclosure 1.

[0114] For example, the bottom surface of the housing 1 is provided with a bottom guard plate 11. When a protective structure 2 is provided on the bottom surface of the housing 1, the protective structure 2 can be provided on the lower side of the bottom guard plate 11. The protective structure 2 can take priority over the bottom guard plate 11 and resist the impact and compression from the bottom first, thereby strengthening the bottom of the housing assembly 10. It can also relatively reduce the thickness of the bottom guard plate 11 and reduce the volume of the cavity.

[0115] In the above technical solution, by making at least a portion of the protective structure 2 located on the bottom surface of the housing 1, the bottom surface of the housing 1 can be reinforced for protection, reducing the probability of deformation or damage to the bottom surface of the housing 1, thereby improving the reliability of the housing 1, extending the service life of the housing 1, improving the protection effect of the housing 1 on the battery cells, and improving the safety of the battery device 100.

[0116] In some embodiments, refer to Figure 5 , Figure 6 and Figure 8 As shown, the protective structure 2 includes a plurality of energy-absorbing parts 21 arranged at intervals, and the energy-absorbing parts 21 are flexible structures.

[0117] Understandably, when the protective structure 2 is subjected to external impact, the energy-absorbing part 21 can disperse and absorb the impact energy through its own deformation, making the stress distribution of the protective structure 2 more uniform, reducing local stress concentration, and reducing damage to the protective structure 2. The arrangement of multiple energy-absorbing parts 21 can improve the energy absorption effect of the protective structure 2 and enhance the protective effect of the protective structure 2 on the housing 1. The spacing between multiple energy-absorbing parts 21 can leave a certain deformation space for the deformation of the energy-absorbing parts 21, better meeting the deformation requirements of the energy-absorbing parts 21, realizing the deformability of the energy-absorbing parts 21, thereby realizing the dispersion and absorption of impact energy by the energy-absorbing parts 21.

[0118] In the above technical solution, the protective structure 2 includes a plurality of energy-absorbing parts 21 arranged at intervals. The energy-absorbing parts 21 are flexible structures. When the protective structure 2 is impacted by an external force, the space between the spaced energy-absorbing parts 21 can provide deformation space for the energy-absorbing parts 21 to deform, which can better meet the deformation requirements of the energy-absorbing parts 21. This allows the energy-absorbing parts 21 to disperse and absorb impact energy through their own deformation, thereby improving the protective effect of the protective structure 2 on the housing 1 and the battery cells.

[0119] In some embodiments, refer to the appendix Figure 6 and attached Figure 8 As shown, in conjunction with the reference appendix Figure 5 and attached Figure 7 The energy-absorbing part 21 has a columnar or sheet-like structure.

[0120] Understandably, when the energy-absorbing part 21 is a columnar structure, it allows for better flexibility. When subjected to external impact, it can effectively absorb impact energy through deformation. Furthermore, the columnar structure offers high space utilization, enabling the arrangement of as many energy-absorbing parts 21 as possible within a limited space, thereby improving the energy absorption effect of the protective structure 2. It should be noted that when the energy-absorbing part 21 is a columnar structure, its axial length, diameter, and whether its free end is circular or pointed can be selected based on the actual application.

[0121] When the energy-absorbing part 21 is a sheet-like structure, when the energy-absorbing part 21 is subjected to an external impact, the sheet-like energy-absorbing part 21 can produce a large in-plane deformation and absorb energy in multiple directions, thereby absorbing more impact energy and improving the protective effect of the protective structure 2 on the housing 1.

[0122] It should be noted that the protective structure 2 includes multiple energy-absorbing parts 21. All energy-absorbing parts 21 may be columnar structures, all energy-absorbing parts 21 may be sheet-like structures, or some energy-absorbing parts 21 may be columnar structures and some energy-absorbing parts 21 may be sheet-like structures. The appropriate shape is selected according to the specific location of the energy-absorbing parts 21.

[0123] In the above technical solution, the energy-absorbing part 21 is a columnar structure or a sheet structure, which can make the energy-absorbing part 21 have good flexibility. When the energy-absorbing part 21 is subjected to external force impact, it can absorb the impact energy better through deformation. The sheet structure of the energy-absorbing part 21 can generate large in-plane deformation, thereby absorbing more impact energy and improving the protective effect of the protective structure 2 on the box 1.

[0124] In some embodiments, refer to Figure 3 and Figure 8 As shown, at least a portion of the energy-absorbing portion 21 has a first surface 211 and a second surface 212 disposed opposite to each other. At least one of the first surface 211 and the second surface 212 is formed with a guide surface, which is inclined downward in the direction from the root of the energy-absorbing portion 21 to the free end of the energy-absorbing portion 21 (e.g., Figure 8 (As shown) extension.

[0125] It is understandable that the energy-absorbing part 21 has a guide surface that extends downwards at an angle. First, the angled guide surface can act as a shield, reducing the probability of liquids, dust, sludge, and other impurities directly contacting the housing 1. Second, the angled guide surface can also act as a guide, causing liquids, dust, and other impurities on the energy-absorbing part 21 to flow along the direction of the guide surface (see attached diagram). Figure 8 The liquid (as shown in direction d) flows rapidly downwards, reducing the accumulation of liquid, dust, and other impurities on the surface of the energy-absorbing part 21. This helps maintain the dryness and cleanliness of the surface of the energy-absorbing part 21, and improves the problem of noise generated by the liquid on the surface of the energy-absorbing part 21. Third, the inclined guide surface can be used to decompose the vertical direction (such as...). Figure 8 The impact force (shown in the up and down direction) is reduced, thus reducing the damage of the vertical impact force to the housing 1 and the battery components inside, and improving the protective effect of the protective structure 2 on the housing 1 and the battery cells.

[0126] Furthermore, when the height of the protective structure 2 along the arrangement direction of the housing 1 and the protective structure 2 is determined, compared to the energy-absorbing part 21 extending directly along the arrangement direction of the housing 1 and the protective structure 2, the inclined energy-absorbing part 21 has a longer deformable stroke and a better energy absorption effect.

[0127] It should be noted that the root of the energy-absorbing part 21 refers to the position where the energy-absorbing part 21 is connected to the housing 1, while the free end of the energy-absorbing part 21 refers to the end of the energy-absorbing part 21 that is away from the housing 1.

[0128] In the above technical solution, since at least part of the energy-absorbing part 21 has a flow-guiding surface, and the flow-guiding surface extends downward at an angle from the root of the energy-absorbing part 21 to the free end of the energy-absorbing part 21, firstly, it can play a shielding role, reducing the probability of liquid, dust, sludge and other impurities directly contacting the housing 1; secondly, it can play a guiding role, reducing the accumulation of liquid, dust and other impurities on the surface of the energy-absorbing part 21, which is conducive to keeping the surface of the energy-absorbing part 21 dry and clean; thirdly, it can be used to decompose the vertical impact force, reduce the damage to the housing 1 and the battery components inside by the vertical impact force, and improve the protection effect of the protective structure 2 on the housing 1 and the battery cells.

[0129] In some embodiments, refer to Figure 8 The angle between the guide surface and the vertical direction is A, and A satisfies: 15°≤A≤85°.

[0130] It is understandable that by limiting the angle A between the guide surface and the vertical direction to satisfy: 15°≤A≤85°, the energy absorption effect of the energy absorption part 21 and the decomposition effect of the vertical impact force can be balanced and coordinated, reducing the damage of the vertical impact force to the housing 1 and the battery components inside, and improving the protection effect of the protective structure 2 on the housing 1 and the battery cells.

[0131] For example, the angle A between the guide surface and the vertical direction can be 15°, 30°, 45°, 50°, 65°, 75°, 80° or 85°.

[0132] In the above technical solution, by limiting the angle A between the guide surface and the vertical direction to satisfy: 15°≤A≤85°, the energy absorption effect of the energy absorption part 21 and the decomposition effect of the impact force in the vertical direction can be balanced and coordinated, thereby improving the protection effect of the protective structure 2 on the box 1 and the battery cell.

[0133] In some embodiments, refer to Figure 3 and Figure 8 As shown, at least a portion of the protective structure 2 is located on the bottom surface of the housing 1. At least a portion of the energy-absorbing portion 21 located on the bottom surface of the housing 1 has a guiding surface. The battery device 100 is used in the vehicle 1000. In the direction from the root of the energy-absorbing portion 21 to the free end of the energy-absorbing portion 21, the guiding surface faces towards the rear of the vehicle (see attached diagram). Figure 9 It extends at an angle in the direction of the rear end shown.

[0134] Understandably, when air flows over an object, if the object's direction of extension is not aligned with the airflow direction, additional drag and turbulence are generated, increasing aerodynamic noise. Conversely, if the object's direction of extension aligns with the airflow direction, turbulence generation is reduced, thereby lowering noise levels. This design not only helps improve equipment efficiency but also significantly improves the acoustic quality of the surrounding environment.

[0135] As the vehicle moves forward at 1000 km / h, the airflow direction is from the front to the rear of the vehicle (see attached document). Figure 9 (As shown in the front-to-back direction), therefore, by defining at least a portion of the energy-absorbing part 21 located on the bottom surface of the housing 1 as having a guide surface, and extending obliquely towards the rear of the vehicle in the direction from the root of the energy-absorbing part 21 to the free end of the energy-absorbing part 21, the extension direction of the guide surface can be made to follow the flow direction of the airflow, rather than perpendicular to or against the flow direction of the airflow, thereby reducing turbulence and eddies generated at the battery device 100 when the airflow flows, thereby reducing noise generation, effectively reducing noise levels, and improving the performance and environmental friendliness of the battery device 100.

[0136] In the above technical solution, by defining at least a portion of the energy-absorbing part 21 located on the bottom surface of the housing 1 as having a guide surface, and extending the guide surface at an angle towards the rear of the vehicle in the direction from the root of the energy-absorbing part 21 to the free end of the energy-absorbing part 21, the extension direction of the guide surface can be made to conform to the flow direction of the airflow, thereby reducing turbulence and eddies generated at the battery device 100 when the airflow flows, reducing noise generation, effectively reducing noise level, and improving the performance and environmental friendliness of the battery device 100.

[0137] In some embodiments, in conjunction with reference to the appendix Figure 2 and attached Figure 3 The multiple energy-absorbing parts 21 located on the same side of the housing 1 are divided into multiple energy-absorbing groups 210, and each energy-absorbing group 210 includes multiple energy-absorbing parts 21 arranged at intervals.

[0138] Understandably, by dividing the multiple energy-absorbing parts 21 located on the same side of the housing 1 into multiple energy-absorbing groups 210, and spacing the multiple energy-absorbing parts 21 in each energy-absorbing group 210 apart, the gap between the multiple energy-absorbing parts 21 can be increased to meet the deformation requirements of the energy-absorbing parts 21. Furthermore, this allows for a denser arrangement of the energy-absorbing parts 21. When the protective structure 2 is impacted by an external force, the multiple energy-absorbing parts 21 of adjacent energy-absorbing groups 210 can simultaneously absorb and disperse the impact energy, forming a concentrated energy-absorbing area. This allows the energy-absorbing parts 21 to function more efficiently and quickly reduce the peak impact force.

[0139] For example, the number of energy-absorbing groups 210 on the same side of the housing 1 can be two, three, five, eight, ten, fifteen, twenty or thirty, and the number of energy-absorbing parts 21 included in each energy-absorbing group 210 can be two, three, five, eight, ten, fifteen, twenty or thirty.

[0140] In the above technical solution, by dividing the multiple energy-absorbing parts 21 located on the same side of the housing 1 into multiple energy-absorbing groups 210, and making the multiple energy-absorbing parts 21 of each energy-absorbing group 210 spaced apart, the gap between the multiple energy-absorbing parts 21 can be increased to meet the deformation requirements of the energy-absorbing parts 21.

[0141] In some embodiments, refer to Figure 2 and Figure 7 The energy-absorbing parts 21 of two adjacent energy-absorbing groups 210 are staggered.

[0142] Of course, this utility model is not limited to this. The energy-absorbing parts 21 of two adjacent energy-absorbing groups 210 can also be arranged opposite each other, which can facilitate the production and processing of the protective structure 2.

[0143] In the above technical solution, the energy-absorbing parts 21 of two adjacent energy-absorbing groups 210 are staggered, which can reserve more deformation space around each energy-absorbing part 21, better meet the deformation requirements of the energy-absorbing part 21, and thus improve the energy absorption efficiency of the protective structure 2.

[0144] In some embodiments, refer to Figure 2 and Figure 8 As shown, at least a portion of the protective structure 2 is located on the bottom surface of the housing 1, and multiple energy-absorbing assemblies 210 located on the bottom surface of the housing 1 are arranged along the width direction of the housing 1 (see attached diagram). Figure 1 The energy-absorbing group 210 is arranged in the direction shown in Figure a, and each energy-absorbing group 210 includes a section along the length of the housing 1 (see attached figure). Figure 1 Multiple energy-absorbing sections 21 are arranged at intervals in the direction b shown.

[0145] It is understandable that by arranging multiple energy-absorbing groups 210 on the bottom surface of the box 1 along the width direction of the box 1, and arranging multiple energy-absorbing parts 21 of each energy-absorbing group 210 along the length direction of the box 1, the energy-absorbing parts 21 can be evenly distributed in multiple directions, realizing modular energy absorption. No matter which direction the impact force comes from, the energy-absorbing parts 21 at the corresponding position can play a role, effectively absorbing and dispersing energy. Furthermore, the energy-absorbing parts 21 at adjacent positions can cooperate with each other when subjected to impact, working together to reduce local stress concentration.

[0146] In the above technical solution, multiple energy-absorbing groups 210 on the bottom surface of the box 1 are arranged along the width direction of the box 1, and multiple energy-absorbing parts 21 of each energy-absorbing group 210 are arranged along the length direction of the box 1. This allows the energy-absorbing parts 21 to be evenly distributed in multiple directions, so that the energy-absorbing parts 21 at adjacent positions can cooperate with each other and work together when subjected to impact, thereby reducing local stress concentration.

[0147] In some embodiments, refer to Figure 3 and Figure 4 As shown, the protective structure 2 also includes a base part 22, which is fixed to the outer wall of the box 1. Multiple energy-absorbing parts 21 are provided on the base part 22 and located on the side of the base part 22 away from the box 1.

[0148] Understandably, when the energy-absorbing part 21 is subjected to an external impact, it can transfer the impact force to the base part 22, thereby dispersing the stress borne by the energy-absorbing part 21 to a larger area, reducing local stress concentration, and thus improving the service life and energy absorption efficiency of the energy-absorbing part 21. Furthermore, after the multiple energy-absorbing parts 21 are assembled with the base part 22, they can be directly fixed to the outer wall of the box 1 through the base part 22, thereby achieving indirect fixing of the multiple energy-absorbing parts 21 to the outer wall of the box 1, reducing the connection difficulty between the multiple energy-absorbing parts 21 and the box 1, and improving the assembly efficiency of the protective structure 2.

[0149] In the above technical solution, the protective structure 2 also includes a base part 22, which is fixed to the outer wall of the box 1. Multiple energy-absorbing parts 21 are disposed on the base part 22 and located on the side of the base part 22 away from the box 1. The base part 22 can disperse the stress borne by the energy-absorbing parts 21 to a larger area, reduce local stress concentration, improve the service life and energy absorption efficiency of the energy-absorbing parts 21. In addition, the base part 22 can realize the indirect fixation of multiple energy-absorbing parts 21 to the outer wall of the box 1, reduce the connection difficulty between multiple energy-absorbing parts 21 and the box 1, and improve the assembly efficiency of the protective structure 2.

[0150] In some embodiments, refer to Figure 2 and Figure 3 The base portion 22 includes multiple sub-base portions 221, each of which is an independently molded part, and multiple energy-absorbing portions 21 are distributed on the multiple sub-base portions 221.

[0151] It is understandable that by splitting the base part 22 into multiple sub-base parts 221, the multiple sub-base parts 221 can be processed separately, reducing the manufacturing difficulty of the entire base part 22, and making it easier to match the multiple energy-absorbing parts 21 with the multiple sub-base parts 221 respectively, thereby reducing the assembly difficulty of the protective structure 2 and improving the manufacturing efficiency of the protective structure 2.

[0152] In the above technical solution, the base part 22 includes multiple sub-base parts 221, each of which is an independently molded part. Multiple energy-absorbing parts 21 are distributed on multiple sub-base parts 221, which can reduce the manufacturing and processing difficulty of the base part 22, reduce the assembly difficulty of the protective structure 2, and improve the manufacturing and processing efficiency of the protective structure 2.

[0153] In some embodiments, in conjunction with reference to the appendix Figure 2 Appendix Figure 3 and attached Figure 4 As shown, the sub-base part 221 is elongated.

[0154] Understandably, the elongated shape facilitates the installation and fixation of the sub-base section 221. The elongated sub-base section 221 itself possesses a certain degree of bending and compressive strength. When multiple elongated sub-base sections 221 are combined, they can support each other, forming a more stable structural system and improving the overall structural strength and rigidity of the base section 22. Furthermore, the elongated sub-base section 221 has good flexibility and plasticity, allowing for bending and splicing operations according to actual needs to meet the requirements of the protective structure 2 on multiple walls of the enclosure 1, providing more comprehensive protection for the enclosure 1.

[0155] In the above technical solution, the sub-base part 221 is elongated, which facilitates the installation and fixation of the sub-base part 221. After multiple elongated sub-base parts 221 are combined, they can support each other to form a more stable structural system, thereby improving the overall structural strength and rigidity of the base part 22.

[0156] Secondly, referring to Figure 9 The present invention provides a vehicle 1000, including: a battery device 100 according to the first aspect of the present invention.

[0157] The battery device 100 can be installed at the bottom of the vehicle body 200.

[0158] In the above technical solution, the housing assembly 10 includes a housing 1 and a protective structure 2. The protective structure 2 is located on the outside of the housing 1 and protrudes from the outer surface of the housing 1. At least part of the protective structure 2 is a flexible structure. When the battery device 100 is impacted by an external force, the protective structure 2 can act as the first line of defense, taking precedence over the housing 1, and resisting the impact and compression of the external force first. This can protect the housing 1, indirectly improving the protective effect of the housing 1 on the battery cells, improving the safety of the battery device 100, and extending the service life of the battery device 100. Furthermore, when the protective structure 2 is deformed by an external force impact, the user can determine the damaged location of the battery device 100 by observing the deformation of the protective structure 2, thereby reducing the maintenance difficulty of the housing assembly 10 and improving the maintenance efficiency of the battery device 100.

[0159] The following reference Figures 1-9 A battery device 100 according to some embodiments of the present invention is described.

[0160] Reference Figures 1-9 The battery device 100 includes a housing assembly 10 and individual battery cells.

[0161] The housing assembly 10 includes an independently formed housing 1 and a protective structure 2. The battery cells are located inside the housing 1. The protective structure 2 is completely bonded to the bottom surface of the housing 1 and protrudes from the bottom surface of the housing 1. The protective structure 2 is a flexible structure. When the bottom of the battery device 100 is impacted by an external force, the protective structure 2 can protect the housing 1, reduce the probability of deformation or damage to the bottom surface of the housing 1, improve the protective effect of the housing 1 on the battery cells, improve the safety of the battery device 100, extend the service life of the battery device 100, and the location of damage to the battery device 100 can be determined by observing the deformation of the protective structure 2, which can reduce the maintenance difficulty of the housing assembly 10 and improve the maintenance efficiency of the battery device 100.

[0162] In some embodiments, refer to Figure 2 , Figure 3 and Figure 4 The protective structure 2 includes a base part 22 and multiple energy-absorbing parts 21. The base part 22 includes multiple sub-base parts 221 arranged along the width direction of the box body 1. Each sub-base part 221 is an independently molded part and is a long strip extending along the length direction of the box body 1. The multiple energy-absorbing parts 21 are divided into multiple energy-absorbing groups 210 arranged along the width direction of the box body 1. Each energy-absorbing group 210 includes multiple energy-absorbing parts 21 spaced apart along the length direction of the box body 1. The number of sub-base parts 221 corresponds one-to-one with the number of energy-absorbing groups 210. The multiple energy-absorbing parts 21 of each energy-absorbing group 210 are located on the same sub-base part 221. The multiple energy-absorbing parts 21 of one energy-absorbing group 210 and one sub-base part 221 form a group. The energy-absorbing group 210 and the sub-base part 221 of the same group are integrally molded rubber parts. The energy-absorbing parts 21 of two adjacent energy-absorbing groups 210 are staggered. The base part 22 can disperse the stress borne by the energy-absorbing part 21 to a larger area, reduce local stress concentration, improve the service life and energy absorption efficiency of the energy-absorbing part 21, and reduce the connection difficulty between multiple energy-absorbing parts 21 and the housing 1, thereby improving the assembly efficiency of the protective structure 2.

[0163] Furthermore, each energy-absorbing part 21 has a first surface 211 and a second surface 212 disposed opposite to each other. Both the first surface 211 and the second surface 212 are formed with a guide surface. In the direction from the root of the energy-absorbing part 21 to the free end of the energy-absorbing part 21, the guide surface extends obliquely downward, and the angle A between the guide surface and the vertical direction is 45°.

[0164] In some embodiments, refer to Figure 5 and Figure 6 The protective structure 2 includes multiple energy-absorbing units 210 arranged along the width direction of the housing 1. Each energy-absorbing unit 210 includes multiple energy-absorbing parts 21 spaced apart along the length direction of the housing 1. Each energy-absorbing part 21 is a columnar structure of nylon fiber. The energy-absorbing parts 21 are arranged along the vertical direction (e.g., Figure 6 As shown, the energy-absorbing parts 21 of two adjacent energy-absorbing groups 210 are arranged opposite each other. The energy-absorbing parts 21 of nylon fiber can make the energy-absorbing parts 21 have better flexibility and better absorb impact energy through deformation, thus meeting the lightweight requirements of the protective structure 2.

[0165] In some embodiments, refer to Figure 7 and Figure 8 The protective structure 2 includes multiple energy-absorbing groups 210 arranged along the width direction of the housing 1. Each energy-absorbing group 210 includes multiple energy-absorbing parts 21 spaced apart along the length direction of the housing 1. Each energy-absorbing part 21 is a sheet-like structure made of metal. The energy-absorbing parts 21 of two adjacent energy-absorbing groups 210 are staggered.

[0166] Furthermore, each energy-absorbing part 21 has a first surface 211 and a second surface 212 arranged opposite to each other. Both the first surface 211 and the second surface 212 are formed with a guide surface. In the direction from the root of the energy-absorbing part 21 to the free end of the energy-absorbing part 21, the guide surface extends obliquely towards the rear of the vehicle, and the angle A between the guide surface and the vertical direction is 75°. This can achieve a balance and coordination between the energy absorption effect of the energy-absorbing part 21 and the decomposition effect of the impact force in the vertical direction, thereby improving the protection effect of the protective structure 2 on the housing 1 and the battery cell.

[0167] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0168] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: The housing assembly (10) includes a housing (1) and a protective structure (2), wherein the protective structure (2) is disposed on the outside of the housing (1) and protrudes from the outer surface of the housing (1), and at least a portion of the protective structure (2) is a flexible structure; The battery cell is located inside the housing (1).

2. The battery device according to claim 1, characterized in that, Both the protective structure (2) and the box body (1) are independently molded parts.

3. The battery device according to claim 2, characterized in that, The protective structure (2) is bonded and fixed to the box body (1).

4. The battery device according to claim 2, characterized in that, The protective structure (2) is detachably fixed to the housing (1).

5. The battery device according to claim 1, characterized in that, The protective structure (2) includes at least one of polymer components and metal components.

6. The battery device according to any one of claims 1-5, characterized in that, At least a portion of the protective structure (2) is located at the lower part of the housing (1).

7. The battery device according to claim 6, characterized in that, At least a portion of the protective structure (2) is disposed on the bottom surface of the housing (1).

8. The battery device according to any one of claims 1-5, characterized in that, The protective structure (2) includes a plurality of energy-absorbing parts (21) spaced apart, and the energy-absorbing parts (21) are flexible structures.

9. The battery device according to claim 8, characterized in that, The energy-absorbing part (21) has a columnar structure or a sheet-like structure.

10. The battery device according to claim 8, characterized in that, At least part of the energy-absorbing part (21) has a first surface (211) and a second surface (212) disposed opposite to each other, at least one of the first surface (211) and the second surface (212) is formed with a guide surface, which extends obliquely downward in the direction from the root of the energy-absorbing part (21) to the free end of the energy-absorbing part (21).

11. The battery device according to claim 10, characterized in that, The angle between the guide surface and the vertical direction is A, and A satisfies: 15°≤A≤85°.

12. The battery device according to claim 10, characterized in that, At least a portion of the protective structure (2) is located on the bottom surface of the housing (1), and at least a portion of the energy-absorbing part (21) located on the bottom surface of the housing (1) has the guide surface. The battery device (100) is used in a vehicle (1000), and the guide surface extends obliquely toward the rear of the vehicle in the direction from the root of the energy-absorbing part (21) to the free end of the energy-absorbing part (21).

13. The battery device according to claim 8, characterized in that, The multiple energy-absorbing parts (21) located on the same side of the housing (1) are divided into multiple energy-absorbing groups (210), and each energy-absorbing group (210) includes multiple energy-absorbing parts (21) arranged at intervals.

14. The battery device according to claim 13, characterized in that, The energy-absorbing parts (21) of two adjacent energy-absorbing groups (210) are staggered.

15. The battery device according to claim 13, characterized in that, At least a portion of the protective structure (2) is located on the bottom surface of the housing (1). A plurality of energy-absorbing groups (210) located on the bottom surface of the housing (1) are arranged along the width direction of the housing (1). Each energy-absorbing group (210) includes a plurality of energy-absorbing parts (21) spaced apart along the length direction of the housing (1).

16. The battery device according to claim 8, characterized in that, The protective structure (2) also includes a base part (22), which is fixed to the outer wall of the box (1). A plurality of energy-absorbing parts (21) are provided on the base part (22) and located on the side of the base part (22) away from the box (1).

17. The battery device according to claim 16, characterized in that, The base portion (22) includes a plurality of sub-base portions (221), each of the sub-base portions (221) being an independently molded part, and the plurality of energy-absorbing portions (21) being distributed on the plurality of sub-base portions (221).

18. The battery device according to claim 17, characterized in that, The sub-base part (221) is elongated.

19. A vehicle, characterized in that, The battery device (100) includes any one of claims 1-18.

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