Battery device and electric equipment

Abstract

According to the battery device and the electric equipment, in the battery device, the first protection part of the protection structure covers the bottom wall of the box body, protection is provided for the box body, and the risk of bottom collision is reduced. As the second protection part is arranged on the first protection part, and the orthographic projection of the second protection part along the direction vertical to the first direction is located on the side wall, when the first protection part covers the bottom wall, the second protection part can form shielding between the bottom wall and the first protection part, the probability that liquid permeates from the position between the bottom wall and the first protection part can be reduced, and the service life of the liquid is prolonged. The risk of water entering the bottom of the battery device is reduced. Meanwhile, a buffer gap is formed between the second protection part and the side wall, so that when side collision or side extrusion occurs, the second protection part can protect the side direction of the box body, the influence of side collision or side extrusion on the box body is weakened by utilizing the buffer gap, the collision or extrusion protection contribution is improved, and the reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] With the rapid development of battery technology, the requirements for battery reliability are becoming increasingly stringent. Therefore, a bottom protection plate is typically installed at the bottom of the battery to reduce external impacts. However, the traditional design of the bottom protection plate limits its contribution to protection against collisions or crushing; it also easily leads to the risk of water ingress into the bottom of the battery. Utility Model Content

[0003] Therefore, it is necessary to provide a battery device and electrical equipment that improves protection against collisions or crushing; at the same time, it also reduces the risk of water ingress at the bottom and improves the reliability of the battery device.

[0004] In a first aspect, this application provides a battery device, which includes: a battery cell; a housing, in which the battery cell is housed, the outer surface of the housing including a bottom wall located below the battery cell along a first direction and a side wall surrounding the outer periphery of the battery cell; and a protective structure including a first protective member and a second protective member connected to the first protective member, the first protective member being disposed on the side of the bottom wall facing away from the battery cell along the first direction and covering the bottom wall, the second protective member being disposed on the side wall and forming a buffer gap with the side wall, and the orthographic projection of the second protective member along a direction perpendicular to the first direction being located on the side wall.

[0005] The aforementioned battery device utilizes a first protective component of the protective structure to cover the bottom wall of the housing, providing protection and reducing the risk of bottom impact. Since a second protective component is provided on the first protective component, and the orthographic projection of the second protective component along a direction perpendicular to the first direction is located on the side wall, when the first protective component covers the bottom wall, the second protective component forms a barrier between the bottom wall and the first protective component. This reduces the likelihood of liquid seeping in from between the bottom wall and the first protective component, lowering the risk of water ingress into the bottom of the battery device. Simultaneously, a buffer gap exists between the second protective component and the side wall. Therefore, in the event of a side impact or side squeeze, the second protective component can provide lateral protection to the housing and utilize the buffer gap to weaken the impact of the side impact or side squeeze on the housing, improving the contribution of impact or squeeze protection and thus enhancing the reliability of the battery device.

[0006] In some embodiments, the surface of the second protective member facing away from the buffer gap includes a first guiding surface. The first guiding surface is inclined relative to a first direction, and the end of the first guiding surface away from the first protective member is further away from the sidewall than the end of the first guiding surface close to the first protective member. This design, by introducing the first guiding surface on the second protective member, can effectively buffer external obstacles against the first protective member, reduce lateral impact forces or lateral extrusion forces, and help improve the stability of the battery device structure.

[0007] In some embodiments, the angle between the first guiding surface and the first direction is denoted as θ, where 30°≤θ≤60°. This design controls the angle between the first guiding surface and the first direction to be between 30° and 60°, effectively balancing the lateral volume of the battery device and the guiding and buffering effect of the first guiding surface.

[0008] In some embodiments, the first guide surface is arranged in a ring around the outer periphery of the housing on the second protective member. This design, with the first guide surface being a ring surface, helps to increase the protection range of the housing, thereby improving the protection contribution against impacts or crushing of the battery device.

[0009] In some embodiments, the surface of the second protective member facing away from the buffer gap further includes a protective surface located on the side of the first guide surface along the first direction and away from the first protective member, with the angle between the protective surface and the first direction being smaller than the angle between the first guide surface and the first direction. This design, by introducing the protective surface, helps to improve the protection effect against lateral impacts or lateral compression, and improves the reliability of the battery device.

[0010] In some embodiments, the distance between the protective surface and the sidewall remains constant along the first direction. This design increases the effective area of ​​the protective surface to resist lateral impacts or lateral compression, thereby improving the effectiveness of lateral protection.

[0011] In some embodiments, the dimension of the protective surface along the first direction is denoted as h, where 10mm ≤ h ≤ 50mm. This design controls the dimension of the protective surface in the first direction to be between 10mm and 50mm, improving lateral protection and enhancing the reliability of the battery device while minimizing the space occupied by the second protective component on the outer periphery of the housing.

[0012] In some embodiments, the second protective member includes a transition portion and a flange. The transition portion connects the first protective member and the flange, and a buffer gap is formed between the transition portion, the flange, and the sidewall. A first guiding surface is disposed on the surface of the transition portion facing away from the buffer gap, and a protective surface is disposed on the surface of the flange facing away from the buffer gap. This design, with the second protective member consisting of a flange and a transition portion, allows lateral impacts or lateral compression to be resisted on the flange. Simultaneously, it allows some external obstacles to be guided towards the first protective member through the transition portion, reducing the force of lateral impacts or lateral compression, thereby improving the lateral protection effect.

[0013] In some embodiments, the first protective member includes a protrusion extending away from the bottom wall. The surface of the protrusion surrounding its outer periphery in a first direction includes a second guiding surface. The second guiding surface corresponds to the first guiding surface, is inclined relative to the first direction, and has its end closer to the bottom wall than its end further away from the bottom wall. This design, introducing the second guiding surface, allows external obstacles to be guided sequentially by both the first and second guiding surfaces, achieving a dual-path guidance and buffer, effectively reducing damage to the battery device from collisions or compression; it also reduces the risk of seal failure at the bottom of the battery device. Furthermore, the cooperation between the first and second guiding surfaces facilitates the battery device's passage over external obstacles, reducing the risk of damage to the bottom structure of the battery device.

[0014] In some embodiments, the first protective member further includes a connecting portion disposed on the protrusion, the connecting portion being connected to the bottom wall. This design, by introducing the connecting portion, facilitates the stable fixing of the first protective member to the bottom wall of the housing, thereby improving the structural stability.

[0015] In some embodiments, the battery device further includes a seal sandwiched between the connection and the bottom wall. This design, by introducing the seal, improves the sealing between the housing and the first protective element, thereby enhancing the reliability of the battery device.

[0016] In some embodiments, the portion of the first protective member extending circumferentially beyond the bottom wall includes a protrusion, and the second protective member is circumferentially connected to the end of the protrusion away from the bottom wall. This design, by introducing the protrusion, makes it easier for the second protective member to deform into the buffer gap, effectively reducing impact or compression energy, thereby improving the reliability of the battery device.

[0017] In some embodiments, a drainage channel is provided through the protrusion and / or the second protective member, and the drainage channel communicates with the buffer gap. This design, by introducing the drainage channel, allows liquid in the buffer gap to be drained, reducing the likelihood of liquid accumulation in the buffer gap and improving the waterproof performance of the battery device.

[0018] In some embodiments, the battery device further includes a filling medium that fills the buffer gap. This design, by introducing the filling medium, improves the sealing at the mating interface between the bottom wall and the first protective member; at the same time, it also absorbs energy from impacts or compressions, achieving effective impact or compression protection.

[0019] In some embodiments, the battery device further includes a reinforcement located between the buffer gaps and connected to the sidewall and the second protective member. This design, with the reinforcement tightly integrated with the second protective member and the housing, improves the overall rigidity of the battery device, thereby enhancing its impact or crush resistance.

[0020] In some embodiments, the battery device further includes a fixing member disposed on the second protective member for mounting a protective plate of the electrical device. This design, by introducing the fixing member, allows the protective plate of the electrical device to be mounted on the second protective member, replacing the need for additional welding or extruded brackets on the housing, thus reducing production costs.

[0021] In some embodiments, the second protective element surrounds the sidewall. This design provides more comprehensive protection for the sidewall, thereby improving the reliability of the battery device.

[0022] Secondly, this application provides an electrical device that includes the battery device described above. Attached Figure Description

[0023] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0024] Figure 2 Exploded views of battery devices provided in some embodiments of this application.

[0025] Figure 3 This is a top view of the structure of a battery device provided in some embodiments of this application.

[0026] Figure 4 for Figure 3 A cross-sectional view of the structure along the AA direction.

[0027] Figure 5 for Figure 3 Enlarged view of the structure at point B in the middle circle.

[0028] Figure 6 Isometric views of the battery device provided in some embodiments of this application.

[0029] Figure 7 Exploded views of the structure of a battery device provided in some embodiments of this application.

[0030] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 101, First Part; 102, Second Part; 103, Frame; 104, Base Plate; 11, Bottom Wall; 12, Side Wall; 20, Protective Structure; 21, First Protective Component; 211, Protrusion; 212, Second Guide Surface; 213, Connecting Part; 214, Protrusion; 215, Cavity; 22, Second Protective Component; 221, Transition Part; 222, Flanged Edge; 223, First Guide Surface; 224, Protective Surface; 23, Buffer Gap; 24, Drainage Channel; 30, Seal; 40, Fixing Component; 50, Battery Cell; 60, Reinforcing Component; X, First Direction. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0038] With the rapid development of battery technology, a bottom guard is typically installed at the bottom of the battery pack to protect against impacts or scratches from below. However, traditional bottom guards only protect the bottom of the battery pack. When the battery pack is subjected to lateral impact or compression, the battery pack casing is susceptible to structural failure, reducing the reliability of the battery pack. Furthermore, the lack of structural protection at the sealing interface between the traditional bottom guard and the casing makes the bottom of the battery pack vulnerable to water ingress.

[0039] Based on this, addressing the issues of insufficient impact or crush protection and the risk of water ingress at the bottom in traditional battery devices, this application provides a battery device that utilizes a first protective component of a protective structure to cover the bottom wall of the casing, providing protection and reducing the risk of bottom impact. Since a second protective component is provided on the first protective component, and the orthographic projection of the second protective component along a direction perpendicular to the first direction is located on the side wall, when the first protective component covers the bottom wall, the second protective component can form a shield between the bottom wall and the first protective component, reducing the probability of liquid seeping in from between the bottom wall and the first protective component, thus lowering the risk of water ingress at the bottom of the battery device. Simultaneously, a buffer gap exists between the second protective component and the side wall; therefore, in the event of a side impact or crush, the second protective component can provide lateral protection to the casing, and the buffer gap weakens the impact of the side impact or crush on the casing, improving the impact or crush protection contribution and thereby improving the reliability of the battery device.

[0040] The battery cell 50 disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles 1000, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery cell 50 and battery device 100 disclosed in this application.

[0041] This application provides an electrical device that uses a battery device 100 as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0042] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0043] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0044] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0045] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 50, the battery cell 50 being housed within the housing 10. The housing 10 provides a receiving space for the battery cell 50, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 101 and a second portion 102, the first portion 101 and the second portion 102 overlapping each other, the first portion 101 and the second portion 102 jointly defining a receiving space for accommodating the battery cell 50. The second portion 102 may be a hollow structure open at one end, and the first portion 101 may be a plate-like structure, the first portion 101 covering the open side of the second portion 102, so that the first portion 101 and the second portion 102 jointly define the receiving space; the first portion 101 and the second portion 102 may also both be hollow structures open on one side, the open side of the first portion 101 covering the open side of the second portion 102. Of course, the box 10 formed by the first part 101 and the second part 102 can be of various shapes, such as cylinder, cuboid, etc.

[0046] In the battery device 100, there can be multiple battery cells 50, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 50 are connected in both series and parallel configurations. Multiple battery cells 50 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 50 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 50 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 50.

[0047] Each battery cell 50 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 50 can be cylindrical, flat, cuboid, or other shapes.

[0048] According to some embodiments of this application, please refer to Figure 3 and Figure 4This application provides a battery device 100, which includes a battery cell 50, a housing 10, and a protective structure 20. The battery cell 50 is housed within the housing 10. The outer surface of the housing 10 includes a bottom wall 11 located below the battery cell 50 along a first direction X and a side wall 12 surrounding the outer periphery of the battery cell 50. The protective structure 20 includes a first protective member 21 and a second protective member 22 connected to the first protective member 21. The first protective member 21 is disposed on the side of the bottom wall 11 facing away from the battery cell 50 along the first direction X and covers the bottom wall 11. The second protective member 22 is disposed on the side wall 12 and forms a buffer gap 23 with the side wall 12. The orthographic projection of the second protective member 22 along a direction perpendicular to the first direction X is located on the side wall 12.

[0049] The housing 10 refers to a structure that provides installation space for the battery cell 50, and it may include a first part 101 and a second part 102. In some examples, the second part 102 may include a base plate 104 and a frame 103 surrounding the base plate 104, with the battery cell 50 placed on the base plate 104 and the frame 103 surrounding the outer periphery of the battery cell 50. In this case, the bottom wall 11 of the housing 10 is the surface of the base plate 104 facing away from the battery cell 50, and the side wall 12 of the housing 10 is the surface of the frame 103 facing away from the battery cell 50.

[0050] When the first protective component 21 covers the bottom wall 11, it shields the area below the bottom wall 11, reducing the likelihood of bottom impacts or scrapes. It is easy to understand that the first protective component 21 can directly cover the bottom wall 11 or indirectly. For example, when the bottom wall 11 of the housing 10 has a cooling structure, the first protective component 21 covers the surface of the cooling structure facing away from the bottom wall 11, thus covering the bottom wall 11 of the housing 10 at intervals. The first protective component 21 can be attached to the bottom wall 11 of the housing 10 using methods such as bolting, snap-fitting, or adhesive bonding.

[0051] Meanwhile, when the first protective member 21 covers the bottom wall 11, the second protective member 22 can surround the outer periphery of the side wall 12 of the housing 10 to provide lateral protection for the housing 10. Specifically, in some examples, the second protective member 22 can be disposed on the circumferential edge of the first protective member 21, and can protrude or be bent along the thickness direction of the first protective member 21.

[0052] It should be noted that the lateral protection provided by the second protective component 22 to the housing 10 may include lateral waterproofing and lateral impact or squeezing protection. In lateral waterproofing, the orthographic projection of the second protective component 22 is located on the side wall 12. Thus, when the first protective component 21 covers the bottom wall 11, the second protective component 22 can shield the mating interface between the first protective component 21 and the bottom wall 11. This allows the second protective component 22 to prevent water from directly entering between the first protective component 21 and the bottom wall 11 under water immersion conditions or other operating conditions, reducing the risk of water ingress into the bottom of the battery device 100.

[0053] In lateral collision or squeezing protection, there is a buffer gap 23 between the second protective member 22 and the side wall 12. When a lateral collision or lateral squeezing occurs, the second protective member 22 can replace the side wall 12 of the housing 10 to resist external forces and can deform into the buffer gap 23 to absorb part of the collision or squeezing energy, reduce the external forces transmitted to the side wall 12, thereby reducing the deformation of the housing 10 due to force and improving the contribution of collision or squeezing protection.

[0054] In addition, the first protective component 21 and the second protective component 22 can be fixed by means of bolt connection, snap-fit, welding, bonding or other methods; of course, the two can also be an integrated structure, for example, formed by bending, stamping, injection molding or die casting or other integrated molding methods.

[0055] It should also be noted that the buffer gap 23 may or may not be filled with a filling medium, such as glue or expanding foam. Of course, in some other examples, a reinforcing structure may also be provided in the buffer gap 23 to connect the second protective member 22 and the side wall 12 to enhance the structural strength of the second protective member 22.

[0056] With this design, the second protective member 22 can form a shield between the bottom wall 11 and the first protective member 21, reducing the probability of liquid seeping in from between the bottom wall 11 and the first protective member 21, and lowering the risk of water entering the bottom of the battery device 100. Simultaneously, a buffer gap 23 exists between the second protective member 22 and the side wall 12. Therefore, in the event of a side impact or squeeze, the second protective member 22 can provide lateral protection for the housing 10, and the buffer gap 23 weakens the impact of the side impact or squeeze on the housing 10, improving the contribution of collision or squeeze protection, thereby improving the reliability of the battery device 100.

[0057] Optionally, according to some embodiments of this application, please refer to Figure 4 The surface of the second protective member 22 facing away from the buffer gap 23 includes a first guide surface 223. The first guide surface 223 is inclined relative to the first direction X, and the end of the first guide surface 223 away from the first protective member 21 is further away from the side wall 12 than the end of the first guide surface 223 close to the first protective member 21.

[0058] When an external obstacle acts on the first guide surface 223, since the first guide surface 223 is inclined, the external obstacle can be guided by the first guide surface 223 to the first protective member 21, which can effectively buffer and reduce the lateral impact force or lateral extrusion force from directly impacting the side wall 12 of the housing 10, thereby reducing the probability of structural failure of the housing 10 due to external collision or extrusion.

[0059] In addition, the external obstacles are guided to the first protective member 21 by the first guiding surface 223, which also helps the protective structure 20 to overcome the external obstacles as a whole and improves the obstacle-crossing effect of the battery device 100.

[0060] The first guide surface 223 may be a part of the surface of the second protective member 22 facing away from the buffer gap 23. For example, when the battery device 100 is applied to the vehicle 1000, the first guide surface 223 may be provided on at least one side wall 12 of the second protective member 22 along the direction of travel; of course, it may also be an annular surface on the second protective member 22, such as being arranged in an annular shape around the outer periphery of the housing 10.

[0061] This design, by introducing a first guide surface 223 on the second protective member 22, can effectively buffer external obstacles on the first protective member 21, reduce lateral impact force or lateral extrusion force, and help improve the stability of the battery device 100 structure.

[0062] Optionally, according to some embodiments of this application, please refer to Figure 4 The angle between the first guiding surface 223 and the first direction X is denoted as θ, where 30°≤θ≤60°.

[0063] For ease of understanding, let's take the first direction X as the vertical direction as an example. If the angle between the first guide surface 223 and the first direction X is too large, it means that the first guide surface 223 is more inclined to a horizontal plane, which will increase the lateral volume of the battery device 100. If the angle between the first guide surface 223 and the first direction X is too small, it means that the first guide surface 223 is more inclined to a vertical plane, which will weaken the guiding and buffering effect on external obstacles.

[0064] Therefore, in this embodiment, the included angle between the first guide surface 223 and the first direction X is controlled between 30° and 60°, for example, but not limited to 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.

[0065] This design controls the angle between the first guide surface 223 and the first direction X to be between 30° and 60°, which can effectively balance the lateral volume of the battery device 100 and the guiding and buffering effect of the first guide surface 223.

[0066] Optionally, according to some embodiments of this application, please refer to Figure 4 The first guide surface 223 is arranged in a ring around the outer periphery of the housing 10 on the second protective component 22.

[0067] It is known that the first guide surface 223 is an annular surface, which can provide 360° guidance and buffering on the second protective component 22, so that obstacles located in different directions can be guided to the first protective component 21, thereby increasing the protection range of the housing 10.

[0068] This design, with the first guide surface 223 being an annular surface, helps to increase the protection range of the housing 10, thereby increasing the protection contribution of the battery device 100 against collisions or compression.

[0069] Optionally, according to some embodiments of this application, please refer to Figure 4 The surface of the second protective member 22 facing away from the buffer gap 23 also includes a protective surface 224. The protective surface 224 is located on the side of the first guide surface 223 along the first direction X and away from the first protective member 21. The angle between the protective surface 224 and the first direction X is smaller than the angle between the first guide surface 223 and the first direction X.

[0070] The protective surface 224 is located above the first guide surface 223 and can block lateral impacts or compressions, reducing the impact or compression deformation on the side wall 12 of the housing 10 and improving the reliability of the battery device 100. The protective surface 224 can be an inclined surface with an inclination angle smaller than that of the first guide surface 223, resulting in a relatively larger projected area in the first direction X. This means the protective surface 224 has a larger component in the first direction X, allowing more area on the protective surface 224 to withstand lateral impacts or compressions, thereby improving the lateral protection effect.

[0071] Of course, the protective surface 224 can be parallel to the first direction X. For example, when the first direction X is vertical, the protective surface 224 is a vertical surface, which makes the effective area of ​​the protective surface 224 to resist lateral collisions or lateral compression larger.

[0072] This design, with the introduction of protective surface 224, helps to improve the protection effect against side impacts or side compressions, and improves the reliability of the battery device 100.

[0073] Optionally, according to some embodiments of this application, please refer to Figure 4 The distance between the protective surface 224 and the side wall 12 remains unchanged along the first direction X.

[0074] As can be seen, in this embodiment, the protective surface 224 is parallel to the first direction X, which makes the effective area of ​​the protective surface 224 to resist lateral collisions or lateral compression larger, thereby improving the effect of lateral protection.

[0075] Meanwhile, the protective surface 224 can also be a part of the surface of the second protective member 22 facing away from the buffer gap 23, or it can be an annular surface on the second protective member 22. Specifically, in some examples, the protective surface 224 is arranged in annular shape around the outer periphery of the housing 10.

[0076] This design increases the effective area of ​​the protective surface 224 to resist lateral impacts or lateral compression, thus improving the effectiveness of lateral protection.

[0077] Optionally, according to some embodiments of this application, please refer to Figure 4 The dimension of the protective surface 224 along the first direction X is denoted as h, where 10mm≤h≤50mm.

[0078] It can be seen that if the size of the protective surface 224 along the first direction X is too large, it will not only increase the space occupied on the outer perimeter of the enclosure 10, but also increase the overall weight of the enclosure 10. At the same time, if it is too small, it will reduce the area of ​​the protective surface 224 on the side of the enclosure 10 and reduce the lateral protection effect.

[0079] Therefore, in this embodiment, the size of the protective surface 224 in the first direction X is controlled between 10mm and 50mm, for example, but not limited to 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, etc.

[0080] This design controls the size of the protective surface 224 in the first direction X to between 10mm and 50mm, improving lateral protection and enhancing the reliability of the battery device 100 while minimizing the space occupied by the second protective component 22 on the outer periphery of the housing 10.

[0081] Optionally, according to some embodiments of this application, please refer to Figure 4 The second protective member 22 includes a transition portion 221 and a flange 222. The transition portion 221 connects the first protective member 21 and the flange 222. A buffer gap 23 is formed between the transition portion 221, the flange 222 and the side wall 12. The first guide surface 223 is provided on the surface of the transition portion 221 facing away from the buffer gap 23, and the protective surface 224 is provided on the surface of the flange 222 facing away from the buffer gap 23.

[0082] The flange 222 refers to a structure that can prevent obstacles from laterally colliding with or squeezing the housing 10, and the transition part 221 refers to the structure connecting the flange 222 and the first protective member 21. The connection methods between the flange 222, the transition part 221, and the first protective member 21 can be various, such as, but not limited to, welding, snap-fitting, and bolting. Of course, the flange 222, the transition part 221, and the first protective member 21 can also be an integrated structure, for example, formed through processes such as bending, stamping, injection molding, and die casting.

[0083] Meanwhile, the flange 222 can be of uniform thickness or unequal thickness. When the flange 222 is of uniform thickness, if the protective surface 224 is parallel to the first direction X, the inner surface of the flange 222 facing the buffer gap 23 is also parallel to the first direction X. In addition, the transition portion 221 can be of uniform thickness or unequal thickness.

[0084] In some specific examples, the flange 222 and the transition portion 221 are both of equal thickness, and the flange 222, the transition portion 221 and the first protective component 21 are all integrated structures.

[0085] This design, with the second protective member 22 consisting of a flange 222 and a transition section 221, allows lateral collisions or lateral compressions to be resisted on the flange 222. At the same time, it also allows some external obstacles to be guided towards the first protective member 21 through the transition section 221, reducing the force of lateral collisions or lateral compressions and thus improving the lateral protection effect.

[0086] Optionally, according to some embodiments of this application, please refer to Figure 4 The first protective member 21 includes a protrusion 211 that protrudes away from the bottom wall 11. The surface of the protrusion 211 surrounding the outer periphery of the first direction X includes a second guide surface 212. The second guide surface 212 corresponds to the first guide surface 223. The second guide surface 212 is inclined relative to the first direction X, and the end of the second guide surface 212 near the bottom wall 11 is closer to the second protective member 22 than the end of the second guide surface 212 away from the bottom wall 11.

[0087] The protrusion 211 refers to the structure formed by the first protective member 21 protruding in the direction away from the bottom wall 11. Its surface surrounding the outer periphery in the first direction X includes an inclined second guide surface 212. Since the second guide surface 212 corresponds to the first guide surface 223, when an external obstacle collides with or is pressed against the first guide surface 223, the obstacle will be guided towards the first protective member 21 by the first guide surface 223. After the obstacle contacts the first protective member 21, it can abut against the second guide surface 212 and be further guided towards the bottom of the first protective member 21 away from the bottom wall 11 under the guidance of the second guide surface 212. In this way, regardless of whether it is a side collision, side compression, or scraping, the risk of damage to the housing 10 from external obstacles can be effectively reduced, improving the reliability of the battery device 100.

[0088] The second guide surface 212 corresponds to the first guide surface 223, meaning that when an obstacle is guided by the first guide surface 223, it can be guided towards the second guide surface 212. When the first guide surface 223 is part of the surface of the second protective member 22 and the second guide surface 212 is part of the surface of the first protective member 21, the first guide surface 223 and the second guide surface 212 can be located on the same side of the protective structure 20. For example, if the protective structure 20 is a square structure, both the first guide surface 223 and the second guide surface 212 can be located on the same side of the protective structure 20. Of course, the first guide surface 223 can be an annular surface on the second protective member 22, and the second guide surface 212 can also be an annular surface on the first protective member 21.

[0089] The tilt angle of the second guide surface 212 relative to the first direction X may be equal to or unequal to the tilt angle of the first guide surface 223. For example, the tilt angle of the second guide surface 212 relative to the first direction X may be greater than or less than the tilt angle of the first guide surface 223.

[0090] In addition, in some examples, a cavity 215 may be formed between the protrusion 211 and the bottom wall 11, so that if the bottom is scraped or collided, the cavity 215 can absorb some of the scraping or collision energy, reducing the probability of the battery device 100 structure being damaged.

[0091] This design, by introducing a second guide surface 212, allows external obstacles to be guided sequentially by the first guide surface 223 and the second guide surface 212, achieving a dual-path guidance and buffer, effectively reducing damage to the battery device 100 from collisions or compression; at the same time, it also reduces the risk of sealing failure at the bottom of the battery device 100. Furthermore, the cooperation between the first guide surface 223 and the second guide surface 212 also facilitates the battery device 100 in overcoming external obstacles, reducing the risk of damage to the bottom structure of the battery device 100.

[0092] Optionally, according to some embodiments of this application, please refer to Figure 4 The first protective component 21 also includes a connecting portion 213 provided on the protrusion 211, and the connecting portion 213 is connected to the bottom wall 11.

[0093] The connecting portion 213 refers to the structure on the first protective member 21 that connects to the bottom wall 11. It can be a ring-shaped structure, such as the connecting portion 213 being arranged around the outer periphery of the protrusion 211. When the first protective member 21 covers the bottom wall 11 of the housing 10, the connecting portion 213 can be fixed to the bottom wall 11, so that the first protective member 21 is stably installed on the bottom wall 11 of the housing 10. At the same time, when the connecting portion 213 is connected to the bottom wall 11, the protrusion 211 can protrude beyond the surface of the connecting portion 213 along the thickness direction of the connecting portion 213, so that the surface of the protrusion 211 protruding beyond the connecting portion 213 can form a second guide surface 212.

[0094] The connection method of the connecting part 213 on the bottom wall 11 can be various, such as, but not limited to, bolt connection, snap-fit, welding, bonding, etc.

[0095] This design, with the introduction of the connecting part 213, facilitates the stable fixing of the first protective component 21 to the bottom wall 11 of the housing 10, thereby improving the stability of the structure.

[0096] Optionally, according to some embodiments of this application, please refer to Figure 4 The battery device 100 also includes a seal 30, which is sandwiched between the connecting part 213 and the bottom wall 11.

[0097] It is understood that the sealing element 30, positioned between the connecting part 213 and the bottom wall 11, improves the sealing performance between the housing 10 and the first protective element 21. The sealing element 30 can have various structural designs. For example, it can be a rubber gasket or a plastic gasket, in which case the connecting part 213 can be connected to the bottom wall 11 via bolts or pins. Compression of the sealing element 30 further enhances the sealing performance. Alternatively, the sealing element 30 can be made of adhesive, allowing the connecting part 213 to be bonded to the bottom wall 11, achieving effective sealing while eliminating the need for bolts or pins.

[0098] The thickness of the seal 30 between the connecting part 213 and the bottom wall 11 can be determined according to the actual process. For example, its thickness can be, but is not limited to, 1mm to 2mm.

[0099] In addition, since the projection of the second protective member 22 along the direction perpendicular to the first direction X is located on the side wall 12 of the housing 10, the second protective member 22 can shield the seal 30, which can reduce the probability of liquid splashing directly or entering the seal 30 and improve the sealing effect.

[0100] This design, with the introduction of the sealing element 30, can improve the sealing between the housing 10 and the first protective element 21, thereby enhancing the reliability of the battery device 100.

[0101] According to some embodiments of this application, optionally, the portion of the first protective member 21 extending circumferentially beyond the bottom wall 11 includes a protrusion 214, and the second protective member 22 is circumferentially connected to the end of the protrusion 214 away from the bottom wall 11.

[0102] The protrusion 214 refers to the portion of the first protective member 21 that extends beyond the bottom wall 11. This makes it easier for the second protective member 22 to form a buffer gap 23 with the side wall 12 of the housing 10. Simultaneously, the protrusion 214 is introduced so that the end of the second protective member 22 connected to the protrusion 214 is also spaced from the side wall 12 of the housing 10, making it easier for the second protective member 22 to deform into the buffer gap 23, effectively reducing collision or compression energy.

[0103] For specific examples, please refer to Figure 4 The first protective member 21 includes a protrusion 214, a connecting portion 213, and a protrusion 211. The connecting portion 213 is connected to the circumferential edge of the protrusion 211, and the protrusion 214 is connected to the end of the connecting portion 213 away from the protrusion 211. The connecting portion 213 is connected to the bottom wall 11 of the housing 10, and the protrusion 214 extends beyond the bottom wall 11 of the housing 10.

[0104] This design, with the protrusion 214, makes it easier for the second protective member 22 to deform into the buffer gap 23, effectively reducing the impact or compression energy, thereby improving the reliability of the battery device 100.

[0105] Optionally, according to some embodiments of this application, please refer to Figure 5 A drain groove 24 is provided through the protrusion 214 and / or the second protective member 22, and the drain groove 24 is connected to the buffer gap 23.

[0106] It is understood that the drain trough 24 is provided through the protrusion 214 and / or the second protective member 22, so that the buffer gap 23 can communicate with the outside through the drain trough 24. If liquid enters the buffer gap 23, the liquid in the buffer gap 23 can be discharged to the outside through the drain trough 24, reducing the probability of liquid accumulation in the buffer gap 23.

[0107] The drainage trough 24 can have various shapes, such as, but not limited to, square, circular, and elliptical. There can be one or multiple drainage troughs 24. When there are multiple drainage troughs 24, they can be spaced apart around the outer perimeter of the housing 10. Furthermore, the spacing between adjacent drainage troughs 24 can also be designed in various ways, for example, the spacing between adjacent drainage troughs 24 can be 100mm to 500mm.

[0108] This design, with the introduction of the drain trough 24, can drain the liquid in the buffer gap 23, reducing the chance of liquid accumulation in the buffer gap 23 and improving the waterproof performance of the battery device 100.

[0109] According to some embodiments of this application, the battery device 100 may optionally include a filling medium that fills the buffer gap 23.

[0110] The filling medium refers to the structure that seals part or all of the buffer gap 23. It can be of various types, such as, but not limited to, adhesives and foaming materials. When the filling medium is filled in the buffer gap 23, it can at least seal the mating interface between the bottom wall 11 and the first protective member 21, further improving the sealing performance. Simultaneously, when the filling medium is adhesive, it can bond the second protective member 22 to the housing 10, further increasing the rigidity of the protective structure 20 and improving its resistance to impact or compression.

[0111] When the filling medium is filled in the buffer gap 23, if the second protective member 22 is subjected to external collision or compression, the filling medium can also play an effective buffering role, absorb part of the collision or compression energy, reduce the collision or compression force transmitted to the box 10, and improve the collision or compression protection contribution.

[0112] This design, by introducing a filling medium, can improve the sealing performance at the interface between the bottom wall 11 and the first protective component 21; at the same time, it can also absorb energy from collisions or compressions, thus achieving effective collision or compression protection.

[0113] Optionally, according to some embodiments of this application, please refer to Figure 6 and Figure 7 The battery device 100 also includes a reinforcing member 60, which is located between the buffer gaps 23 and connected to the side wall 12 and the second protective member 22.

[0114] The reinforcing member 60 connects the side wall 12 and the second protective member 22, which can tightly integrate the second protective member 22 with the housing 10. This not only helps to improve the installation stability of the protective structure 20 on the housing 10, but also helps to improve the overall rigidity of the battery device 100, thereby improving its anti-collision or crushing performance.

[0115] The connection methods between the reinforcing member 60 and the side wall 12 and the second protective member 22 are various, such as bolt connection, snap-fit, bonding, welding, etc. The material of the reinforcing member 60 can also be varied, including but not limited to stainless steel and aluminum alloy. Furthermore, the cross-sectional shape of the reinforcing member 60 can also be varied, including but not limited to square, circular, elliptical, and irregular shapes.

[0116] This design, with the introduction of reinforcing member 60, tightly integrates the second protective member 22 with the housing 10, which helps to improve the overall rigidity of the battery device 100, thereby improving its anti-collision or crushing performance.

[0117] Optionally, according to some embodiments of this application, please refer to Figure 4 The battery device 100 also includes a fixing member 40, which is disposed on the second protective member 22 and is used to install the protective plate of the electrical equipment.

[0118] When the electrical equipment is a vehicle 1000, it can be fixed to the fixing component 40 via the vehicle's protective plate, instead of being directly fixed to the housing 10. This eliminates the need for additional welding or extruded bracket structures on the housing 10, reducing production costs. Of course, the electrical equipment can also be other types, such as electric toys, power tools, ships, spacecraft, etc., and their protective plates can be fixed to the fixing component 40. The fixing component 40 can be, but is not limited to, bolts, brackets, or other structures.

[0119] This design introduces a fastener 40, allowing the protective plate of the electrical equipment to be installed on the second protective component 22, instead of requiring additional welding or extruded brackets on the housing 10, thus reducing production costs.

[0120] In some embodiments, please refer to Figure 7 The second protective component 22 surrounds the side wall 12.

[0121] It can be seen that the second protective component 22 has a ring-shaped structure, which surrounds the outer periphery of the side wall 12 and can provide 360° or nearly 360° protection for the side wall 12.

[0122] This design provides more comprehensive protection for the sidewall 12, thereby improving the reliability of the battery device 100.

[0123] According to some embodiments of this application, this application provides an electrical device, which includes the battery device 100 of any of the above.

[0124] According to some embodiments of this application, please refer to Figures 3 to 7This application provides a battery device 100, which includes a housing 10, a sealing member 30, and a protective structure 20. The protective structure 20 includes a first protective member 21 and a second protective member 22 connected to the circumference of the first protective member 21. The surface of the housing 10 includes a bottom wall 11 and a side wall 12 surrounding the outer periphery of the bottom wall 11. The first protective member 21 covers the bottom wall 11, and the sealing member 30 is sandwiched between the bottom wall 11 and the first protective member 21. The second protective member 22 surrounds the outer periphery of the side wall 12 of the housing 10 and has a buffer gap 23 between it and the side wall 12. The second protective member 22 includes a transition portion 221 and a flange 222 provided in the transition portion 221. The first protective member 21 includes a protrusion 211, a connecting portion 213 provided around the protrusion 211, and a protruding portion 214 provided around the connecting portion 213. The surface of the transition portion 221 facing away from the buffer gap 23 includes an inclined first guide surface 223, and the circumferential sidewall 12 of the protrusion 211 includes an inclined second guide surface 212. This design enables the battery device 100 to meet the GB standard of 100KN or 200KN compression, which is more stringent, thereby improving its performance in impact situations. Simultaneously, for vehicle undercarriage scraping, it can ensure that the bottom seal of the undercarriage protection structure does not fail and the structure does not crack after flat or oblique scraping, achieving stringent undercarriage scraping standards such as no intrusion or leakage.

[0125] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, The battery device includes: Battery cell (50); The housing (10) houses the battery cell (50) and the outer surface of the housing (10) includes a bottom wall (11) located below the battery cell (50) along a first direction (X) and a side wall (12) surrounding the outer periphery of the battery cell (50). The protective structure (20) includes a first protective member (21) and a second protective member (22) connected to the first protective member (21). The first protective member (21) is disposed on the side of the bottom wall (11) facing away from the battery cell (50) along the first direction (X) and the first protective member (21) covers the bottom wall (11). The second protective member (22) is disposed on the side wall (12) and forms a buffer gap (23) with the side wall (12). The second protective member (22) is located on the side wall (12) with its orthographic projection along a direction perpendicular to the first direction (X).

2. The battery device according to claim 1, characterized in that, The surface of the second protective member (22) facing away from the buffer gap (23) includes a first guide surface (223), which is inclined relative to the first direction (X), and the end of the first guide surface (223) away from the first protective member (21) is further away from the sidewall (12) than the end of the first guide surface (223) closer to the first protective member (21).

3. The battery device according to claim 2, characterized in that, The angle between the first guide surface (223) and the first direction (X) is denoted as θ, where 30°≤θ≤60°.

4. The battery device according to claim 2, characterized in that, The first guide surface (223) is arranged in a ring around the outer periphery of the housing (10) on the second protective member (22).

5. The battery device according to claim 2, characterized in that, The surface of the second protective member (22) facing away from the buffer gap (23) also includes a protective surface (224), which is located on the side of the first guide surface (223) along the first direction (X) and away from the first protective member (21). The angle between the protective surface (224) and the first direction (X) is smaller than the angle between the first guide surface (223) and the first direction (X).

6. The battery device according to claim 5, characterized in that, The distance between the protective surface (224) and the sidewall (12) remains constant along the first direction (X).

7. The battery device according to claim 5, characterized in that, The dimension of the protective surface (224) along the first direction (X) is denoted as h, where 10mm≤h≤50mm.

8. The battery device according to claim 5, characterized in that, The second protective member (22) includes a transition portion (221) and a flange (222). The transition portion (221) connects the first protective member (21) and the flange (222). The buffer gap (23) is formed between the transition portion (221), the flange (222) and the side wall (12). The first guide surface (223) is provided on the surface of the transition portion (221) facing away from the buffer gap (23), and the protective surface (224) is provided on the surface of the flange (222) facing away from the buffer gap (23).

9. The battery device according to any one of claims 2-8, characterized in that, The first protective member (21) includes a protrusion (211) that protrudes away from the bottom wall (11). The surface of the protrusion (211) surrounding the outer periphery of the first direction (X) includes a second guide surface (212). The second guide surface (212) corresponds to the first guide surface (223). The second guide surface (212) is inclined relative to the first direction (X), and the end of the second guide surface (212) near the bottom wall (11) is closer to the second protective member (22) than the end of the second guide surface (212) away from the bottom wall (11).

10. The battery device according to claim 9, characterized in that, The first protective member (21) further includes a connecting part (213) provided on the protrusion (211), and the connecting part (213) is connected to the bottom wall (11).

11. The battery device according to claim 10, characterized in that, The battery device also includes a seal (30) sandwiched between the connecting portion (213) and the bottom wall (11).

12. The battery device according to any one of claims 1-8, characterized in that, The portion of the first protective member (21) extending circumferentially beyond the bottom wall (11) includes a protrusion (214), and the second protective member (22) is circumferentially connected to the end of the protrusion (214) away from the bottom wall (11).

13. The battery device according to claim 12, characterized in that, A drain groove (24) is provided through the protrusion (214) and / or the second protective member (22), and the drain groove (24) is connected to the buffer gap (23).

14. The battery device according to any one of claims 1-8, characterized in that, The battery device further includes a filling medium that fills the buffer gap (23).

15. The battery device according to any one of claims 1-8, characterized in that, The battery device also includes a reinforcing member (60) located between the buffer gaps (23) and connected to the side wall (12) and the second protective member (22).

16. The battery device according to any one of claims 1-8, characterized in that, The battery device also includes a fixing member (40), which is disposed on the second protective member (22) and is used to install the protective plate of the electrical equipment.

17. The battery device according to any one of claims 1-8, characterized in that, The second protective element (22) surrounds the sidewall (12).

18. An electrical appliance, characterized in that, The electrical equipment includes the battery device according to any one of claims 1-17.

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