Battery device and electric device

Abstract

The application discloses a battery device and an electric device. The battery device comprises a box body defining a containing cavity with an open side. The box body comprises a side beam comprising a side beam body and a mounting portion protruding towards the containing cavity. The mounting portion cooperates with the side beam body to define an avoiding space below the mounting portion. A cover plate is arranged outside the avoiding space and connected with the mounting portion to cover the containing cavity. A battery monomer assembly is arranged in the containing cavity. At least part of the battery monomer assembly is below the mounting portion in the up-down direction. According to the battery device, when a side collision occurs, the side beam can deform towards the avoiding space, reducing the probability of the side beam directly impacting the battery monomer assembly and improving the reliability of the battery device. Meanwhile, the electric space of the battery monomer assembly can be increased, so that the electric quantity of the battery device can be increased. In addition, the assembly rate of the battery device can be improved.

Description

Technical Field

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

[0002] In related technologies, after a side impact, the battery pack casing can squeeze or puncture the individual battery cells, which can easily deform, potentially leading to battery pack explosion or fire. To ensure side impact safety, a certain safety space is reserved between the battery pack casing and the individual battery cells. However, this reduces the electrical conductivity of the individual battery cells, resulting in lower electrical capacity. Increasing the overall size of the casing would also require a significant amount of space across the vehicle's width. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a battery device that defines a clearance space within a side beam to separate the side beam body from the battery cell assembly. The clearance space provides accommodation for the deformation of the side beam, reducing the probability of the side beam puncturing or compressing the battery cell assembly, thereby improving the reliability of the battery device.

[0004] This application also proposes an electrical device having the above-mentioned battery device.

[0005] A battery device according to a first aspect of this application includes: a housing defining a receiving cavity with an opening on one side; the housing including: a side beam including a side beam body and a mounting portion protruding toward the receiving cavity, the mounting portion cooperating with the side beam body to define a clearance space located below the mounting portion; a cover plate disposed outside the clearance space and connected to the mounting portion for sealing the receiving cavity; and a battery cell assembly disposed within the receiving cavity, wherein at least a portion of the battery cell assembly is located below the mounting portion in a vertical direction.

[0006] According to the battery device of this application, by providing an obstacle avoidance space, the side beam can deform towards the obstacle avoidance space when a side collision occurs, reducing the probability of the side beam directly impacting the battery cell assembly, thereby improving the reliability of the battery device. Simultaneously, a portion of the battery cell assembly can extend into the obstacle avoidance space, increasing the power distribution space of the battery cell assembly and thus increasing the battery device's capacity. Furthermore, by placing the cover plate outside the obstacle avoidance space and connecting it to the mounting part, the cover plate does not occupy the space of the obstacle avoidance space, further increasing the deformation and power distribution of the obstacle avoidance space. This also facilitates the connection between the cover plate and the mounting part, reducing the assembly difficulty of the housing, simplifying the battery device assembly steps, and increasing the assembly speed of the battery device.

[0007] In some embodiments, the cover plate is connected to the side of the mounting portion opposite to the clearance space.

[0008] This embodiment improves the ease of connection between the cover plate and the mounting part by connecting the cover plate to the side of the mounting part that is away from the clearance space.

[0009] In some embodiments, the cover plate includes: a main board portion, a bent portion, and a connecting plate portion. The main board portion is horizontally disposed. One end of the bent portion is connected to the periphery of the main board portion, and the other end of the bent portion extends in a direction away from the main board portion. The connecting plate portion is horizontally disposed and connected to the other end of the bent portion. The connecting plate portion is located on the upper side of the mounting portion and is fixedly connected to the mounting portion.

[0010] This embodiment improves the ease of connection between the cover plate and the mounting part by providing a cover plate including a main plate part, a bending part, and a connecting plate part. At the same time, by setting the connecting plate part horizontally, the contact area between the connecting plate part and the mounting part can be increased, thereby improving the connection stability between the cover plate and the mounting part. This improves the sealing performance of the connection between the cover plate and the frame, increases the sealing effect at the connection, and thus improves the airtightness of the battery device and increases the reliability of the battery device.

[0011] In some embodiments, the motherboard portion is flush with the lower surface of the mounting portion.

[0012] In this embodiment, by setting the lower surfaces of the main board and the mounting part to be flush, the battery cell assembly can be located completely below the mounting part. In this way, when the battery device is involved in a side collision, the side beam body deforms toward the clearance space, and the mounting part deforms toward the top of the battery cell assembly. This further reduces the probability of the side beam squeezing or puncturing the battery cell assembly when it deforms.

[0013] In some embodiments, the housing further includes a seal that extends circumferentially along the cover plate in an annular shape and abuts and seals between the mounting portion and the connecting plate portion.

[0014] This embodiment improves the sealing effect of the cover plate and side beam by setting a sealing element, thereby further improving the airtight reliability of the battery device. At the same time, it can also effectively prevent impurities outside the battery from entering the receiving cavity from the connection between the cover plate and the side beam, thereby further improving the reliability of the battery. In addition, it can reduce the direct impact and wear when the mounting part contacts the cover plate, which helps to extend the service life of the mounting part and the cover plate.

[0015] In some embodiments, the upper surface of the mounting portion is formed with a mounting groove, and the seal is disposed within the mounting groove.

[0016] This embodiment uses an installation groove to position and limit the sealing element. This prevents the sealing element from shifting due to external force during cover plate installation, thus avoiding poor sealing of the enclosure. It also increases the assembly speed of the enclosure.

[0017] In some embodiments, the upper surface of the mounting portion is lower than the upper surface of the side beam body.

[0018] This embodiment improves the installation space above the cover by setting the upper surface of the mounting part lower than the upper surface of the side beam body, thereby enhancing the convenience of assembling the battery device with the vehicle.

[0019] In some embodiments, the battery cell assembly is spaced apart from the mounting portion in the direction of the side beam toward the battery cell assembly; or, in the vertical direction, the end of the battery cell assembly facing the side beam is aligned with the end of the mounting portion facing the battery cell assembly; or, a portion of the battery cell assembly extends into the clearance space.

[0020] This embodiment provides users with a variety of battery devices by setting different positional relationships between individual battery components and clearance spaces, thus rationally arranging the internal space of the battery device.

[0021] In some embodiments, the side beam includes two first beam segments extending in a front-to-back direction and spaced apart in a left-to-right direction, each of the two first beam segments having the mounting portion formed thereon.

[0022] This embodiment sets the side beam to include two first beam segments, and each of the two first beam segments has a mounting part. When the vehicle or battery device is involved in a side collision, the avoidance space can provide a buffer space, allowing the first beam segments to deform toward the avoidance space, reducing the probability of the side beam directly impacting the battery cell assembly, thereby improving the reliability of the battery device.

[0023] In some embodiments, the housing further includes a bottom plate assembly disposed on the lower side of the side beam, the bottom plate assembly being connected to the side beam to jointly define the receiving cavity.

[0024] This embodiment, by setting a base plate assembly, can further enhance the protective function of the enclosure, thereby increasing the service life of the battery device.

[0025] In some embodiments, the lower end face of the side beam body is formed with a groove that extends through the side wall of the side beam body toward the receiving cavity, and the edge of the bottom plate assembly is adapted to fit into the groove.

[0026] This embodiment, by setting grooves, enables the side beam body to protect the bottom plate assembly, effectively reducing the problem of airtightness failure of the housing; at the same time, it can also reduce wind resistance, thereby improving the stability of vehicle driving.

[0027] In some embodiments, the side beam includes two second beam segments extending in a left-right direction and spaced apart in a front-back direction, the second beam segments having the groove formed thereon.

[0028] This embodiment, by setting the side beam to include two second beam segments with grooves formed on the second beam segments, can make the side beam not only protect the bottom protection assembly, but also reduce the manufacturing difficulty and cost of the side beam.

[0029] The power supply device according to the second aspect of this application includes: the battery device according to the first aspect of this application.

[0030] According to the electrical device of this application, the improved performance of the battery device is beneficial to improving the electrical performance of the electrical device.

[0031] In some embodiments, the electrical device is a vehicle, the housing is part of the vehicle's chassis, and the side beam is the vehicle's door sill beam.

[0032] This embodiment integrates the battery device directly into the vehicle, eliminating the need for the casing and related components of a traditional battery device, thereby reducing the overall vehicle weight, improving space utilization, and increasing the driving range.

[0033] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0034] Figure 1 These are schematic diagrams of vehicles according to some embodiments of this application;

[0035] Figure 2 These are schematic diagrams of battery devices according to some embodiments of this application;

[0036] Figure 3 This is a schematic diagram of a battery device according to some embodiments of this application from another angle;

[0037] Figure 4 This is an exploded view of a battery device according to some embodiments of this application;

[0038] Figure 5 This is a partial cross-sectional view of a battery device according to some embodiments of this application from one angle;

[0039] Figure 6 This is a partial cross-sectional view of a battery device according to some embodiments of this application from another angle;

[0040] Figure 7 This is a partial cross-sectional view of a battery device according to some embodiments of this application from another angle.

[0041] Figure label:

[0042] 1. Vehicles;

[0043] 1000, Battery device;

[0044] 100. Box body; 101. Receiving cavity;

[0045] 10. Side beam; 11. Side beam body; 111. Groove; 12. Mounting part; 121. Mounting slot; 13. Clearance space; 14. First beam segment; 15. Second beam segment; 16. Cavity;

[0046] 20. Cover plate; 21. Main board section; 22. Bending section; 23. Connecting plate section;

[0047] 30. Sealing components;

[0048] 40. Base plate assembly;

[0049] 200. Battery cell modules;

[0050] 2000, controller; 3000, motor. Detailed Implementation

[0051] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0054] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments in this application, 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0057] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] 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.

[0060] 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 widely applied 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 power battery applications, market demand is also constantly increasing.

[0061] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells, and when there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed connection via a busbar.

[0062] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0063] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. The battery cell assembly may be a battery module, and can be housed within the housing by securing the battery module to the housing. Alternatively, the battery cell assembly may be housed within the housing by directly securing multiple battery cells to the housing.

[0064] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of both energy density and reliability.

[0065] When the battery pack is subjected to a side impact, the casing may compress or puncture the individual battery cells, which may deform, potentially leading to a battery pack explosion or fire. To ensure safety in side impacts, a certain safety space is provided between the battery pack casing and the individual battery cells. However, this reduces the electrical conductivity of the individual battery cells, resulting in a lower electrical capacity. Increasing the overall size of the casing would also require a significant amount of space across the vehicle's width.

[0066] Based on the above considerations, a battery device is designed, comprising a housing and battery cell assemblies. The housing includes a side beam, which includes a side beam body and a mounting portion. The mounting portion is connected to the side of the side beam body facing the receiving cavity. The mounting portion cooperates with the side beam body to define a clearance space located below the mounting portion. In the vertical direction, at least a portion of the battery cell assembly is located below the mounting portion. The clearance space defined within the side beam can separate the side beam body from the battery cell assembly. Thus, when a side collision occurs, the clearance space can provide accommodation for the deformation of the side beam, thereby reducing the probability of the side beam puncturing or crushing the battery cell assembly and improving the reliability of the battery device.

[0067] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. 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.

[0068] For ease of explanation, the following embodiments use a vehicle 1 as an example to describe in detail the structure of the electrical device, battery device 1000, and battery cell assembly 200 of this application.

[0069] Please refer to Figure 1 , Figure 1The diagram below illustrates the structure of a vehicle 1, provided in some embodiments of this application. Vehicle 1 can be a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. A battery device 1000 is installed inside vehicle 1, and the battery device 1000 can be located at the bottom, front, or rear of vehicle 1. The battery device 1000 can be used to power vehicle 1; for example, it can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 2000 and a motor 3000. The controller 2000 controls the battery device 1000 to supply power to the motor 3000, for example, to meet the power needs of vehicle 1 during startup, navigation, and driving.

[0070] In some embodiments of this application, the battery device 1000 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0071] The following is for reference. Figures 2-7 A battery device 1000 according to an embodiment of the first aspect of this application is described. Figure 2 and Figure 3 These are schematic diagrams of the battery device 1000 from different angles according to some embodiments of this application. Figure 4 This is an exploded view of a battery device 1000 according to some embodiments of this application. Figures 5-7 These are partial cross-sectional views of a battery device 1000 from different angles according to some embodiments of this application.

[0072] An embodiment of this application provides a battery device 1000, referring to... Figures 2-5 The battery device 1000 includes a housing 100 and a battery cell assembly 200. The housing 100 provides assembly space for the battery cell assembly 200, which is housed within the housing 100.

[0073] Specifically, the housing 100 defines a receiving cavity 101 with an opening on one side. The housing 100 includes a side beam 10 and a cover plate 20. The side beam 10 includes a side beam body 11 and a mounting portion 12 protruding into the receiving cavity 101. The mounting portion 12 cooperates with the side beam body 11 to define a clearance space 13 located below the mounting portion 12. The cover plate 20 is arranged outside the clearance space 13 and connected to the mounting portion 12 to cover the receiving cavity 101. A battery cell assembly 200 is disposed in the receiving cavity 101. In the vertical direction, at least a portion of the battery cell assembly 200 is located below the mounting portion 12.

[0074] For example, the housing 100 includes side beams 10 and a bottom plate. The number of side beams 10 can be four, connected end-to-end and to the bottom plate to define a receiving cavity 101. Alternatively, the number of side beams 10 can be two, spaced apart. Specifically, each side beam 10 includes a side beam body 11 and a mounting portion 12. The mounting portion 12 is connected to the side of the side beam body 11 facing the receiving cavity 101, and in the vertical direction, the lower surface of the mounting portion 12 is higher than the lower surface of the side beam body 11, thus defining a clearance space 13 located below the mounting portion 12 when the mounting portion 12 cooperates with the side beam body 11.

[0075] The housing 100 also includes a cover plate 20, which is arranged outside the clearance space 13. That is, the cover plate 20 is located outside the clearance space 13 and is connected to the mounting part 12 outside the clearance space 13 to cover the receiving cavity 101. For example, the cover plate 20 may be arranged on the side of the mounting part 12 away from the side beam body 11 and connected to the surface of the mounting part 12 away from the side beam body 11 or the surface of the mounting part 12 away from the clearance space 13.

[0076] The cover plate 20 is mainly used to seal the receiving cavity 101, thereby preventing impurities from the external environment from entering the receiving cavity 101 and damaging the battery cell assembly 200, thus improving the reliability of the battery cell assembly 200. Furthermore, the cover plate 20 is located outside the clearance space 13 and connected to the mounting part 12. This ensures the dimensions of the clearance space 13 while facilitating the connection between the cover plate 20 and the mounting part 12, thereby reducing the assembly difficulty of the housing 100, simplifying the assembly steps of the battery device 1000, and increasing the assembly speed of the battery device 1000.

[0077] The battery cell assembly 200 is disposed within the receiving cavity 101, and at least a portion of the battery cell assembly 200 is located below the mounting portion 12 in the vertical direction. The phrase "at least a portion of the battery cell assembly 200 is located below the mounting portion 12" can be understood to mean that the battery cell assembly 200 may be partially located below the mounting portion 12, or the entire battery cell assembly 200 may be located below the mounting portion 12.

[0078] Optionally, the battery cell assembly 200 can be located diagonally below the mounting portion 12, i.e., the clearance space 13 is a cavity. When the battery device 1000 is subjected to a side impact, the side beam 10 will deform toward the clearance space 13. The clearance space 13 provides a space to accommodate the deformation of the side beam 10, reducing the probability of the side beam 10 directly impacting the battery cell assembly 200, i.e. reducing the probability of the battery cell assembly 200 being punctured or squeezed, thereby improving the reliability of the battery device 1000.

[0079] Optionally, a portion of the battery cell assembly 200 may be located directly below the mounting portion 12, meaning a portion of the battery cell assembly 200 extends into the clearance space 13. Additionally, a gap space may be reserved between the battery cell assembly 200 and the side beam body 11. Based on existing technology, this increases the electrical distribution space of the battery cell assembly 200, thereby increasing the power capacity of the battery device 1000. Furthermore, in the event of a side impact, the gap space provides accommodation for the deformation of the side beam 10, reducing the probability of the battery cell assembly 200 being punctured or crushed, thus improving the reliability of the battery device 1000.

[0080] It should be noted that in some embodiments, the battery device 1000 can be a battery pack. In this case, the battery pack includes a housing 100 and one or more battery cell assemblies 200, with the battery cell assemblies 200 housed within the housing 100. The battery cell assembly 200 can be a battery module, and can be housed within the housing 100 by fixing the battery module to the housing 100; alternatively, the battery cell assembly 200 can also be housed within the housing 100 by directly fixing multiple battery cells to the housing 100.

[0081] The housing 100 also includes a cover plate 20 and a bottom plate. The cover plate 20 and the bottom plate are both connected to the side beam 10 and are located at the upper and lower ends of the side beam 10, respectively. One or more battery cell assemblies 200 can be fixed on the bottom plate. The bottom plate is used to support the battery cell assembly 200, and the cover plate 20 is used to close the upper opening of the receiving cavity 101.

[0082] In other embodiments, the electrical device is a vehicle 1, and the battery device 1000 can also be directly integrated into the vehicle 1. The battery device 1000 includes a housing 100 and one or more battery cell assemblies 200. The housing 100 is part of the chassis structure of the vehicle 1. For example, the side beam 10 of the housing 100 can be at least a part of the crossbeam, longitudinal beam, or sill beam of the vehicle 1. In this application, the side beam 10 of the housing 100 is the sill beam of the vehicle 1. The battery cell assembly 200 can be a battery module, which can be directly fixed to the sill beam; or, the battery cell assembly 200 can be made by directly fixing multiple battery cells to the sill beam.

[0083] The housing 100 also includes a cover plate 20 and a tray. The cover plate 20 can be the floor of the vehicle 1 or a separate component. The cover plate 20 and the tray are both connected to the side beam 10 and are located at the upper and lower ends of the side beam 10, respectively. One or more battery cell assemblies 200 can be fixed on the cover plate 20. The cover plate 20 is used to fix the battery cell assembly 200, and the tray is used to close the bottom of the battery cell assembly 200.

[0084] According to the battery device 1000 of this application, by providing a clearance space 13, the side beam 10 of the battery device 1000 can deform toward the clearance space 13 when a side collision occurs, reducing the probability of the side beam 10 directly impacting the battery cell assembly 200, thereby improving the reliability of the battery device 1000. At the same time, a part of the battery cell assembly 200 can extend into the clearance space 13, thus increasing the power distribution space of the battery cell assembly 200, thereby increasing the power capacity of the battery device 1000. In addition, by setting the cover plate 20 on the outside of the clearance space 13 and connecting it to the mounting part 12, the cover plate 20 does not occupy the space of the clearance space 13, thereby further improving the deformation and power distribution of the clearance space 13. At the same time, it is also beneficial to connect the cover plate 20 to the mounting part 12, thereby reducing the assembly difficulty of the housing 100, simplifying the assembly steps of the battery device 1000, and increasing the assembly speed of the battery device 1000.

[0085] In some embodiments, refer to Figure 5 The cover plate 20 is connected to the side of the mounting part 12 that is away from the clearance space 13.

[0086] It is understandable that the cover plate 20 is connected to the upper surface of the mounting part 12, which can further improve the ease of connection between the cover plate 20 and the mounting part 12.

[0087] It should be noted that the upper surface of the mounting part 12 can be flush with the upper surface of the side beam body 11, or it can be higher or lower than the upper surface of the side beam body 11. The specific design can be made according to the actual vehicle model and installation position.

[0088] In this embodiment, by connecting the cover plate 20 to the side of the mounting part 12 that is away from the clearance space 13, the connection between the cover plate 20 and the mounting part 12 can be further improved.

[0089] In some embodiments, refer to Figures 5-7 The cover plate 20 includes a main board portion 21, a bent portion 22, and a connecting plate portion 23. The main board portion 21 is horizontally arranged. One end of the bent portion 22 is connected to the periphery of the main board portion 21, and the other end of the bent portion 22 extends away from the main board portion 21. The connecting plate portion 23 is horizontally arranged and connected to the other end of the bent portion 22. The connecting plate portion 23 is located on the upper side of the mounting portion 12 and is fixedly connected to the mounting portion 12.

[0090] Specifically, the main board section 21 is mainly arranged above the battery cell assembly 200, and is mainly used to bear the pressure from above. The horizontal arrangement of the main board section 21 can reduce the manufacturing difficulty of the cover plate 20. The bending section 22 mainly serves to connect the main board section 21 and the connecting plate section 23. At the same time, the bending section 22 can also strengthen the strength of the main board section 21, thereby increasing the impact resistance of the main board section 21. The connecting plate section 23 is mainly used for fixed connection with the mounting section 12. The horizontal arrangement of the connecting plate section 23 can increase the contact area between the connecting plate section 23 and the mounting section 12, thereby improving the connection stability between the cover plate 20 and the mounting section 12, thus improving the connection sealing of the cover plate 20 and the frame, increasing the sealing effect at the connection, thereby improving the airtightness of the battery device 1000 and increasing the reliability of the battery device 1000.

[0091] It should be noted that the bending portion 22 can extend at an angle away from the main board portion 21, or it can extend vertically. The specific design can be made according to the actual size and position.

[0092] This embodiment improves the ease of connection between the cover plate 20 and the mounting part 12 by including a main board part 21, a bent part 22, and a connecting plate part 23 in the cover plate 20. At the same time, by setting the connecting plate part 23 horizontally, the contact area between the connecting plate part 23 and the mounting part 12 can be increased, thereby improving the connection stability between the cover plate 20 and the mounting part 12. This improves the sealing performance of the connection between the cover plate 20 and the frame, increases the sealing effect at the connection, and thus improves the airtightness of the battery device 1000 and increases the reliability of the battery device 1000.

[0093] In some embodiments, refer to Figures 5-6 The lower surface of the motherboard 21 is flush with the lower surface of the mounting part 12.

[0094] Specifically, the main board portion 21 is positioned above the battery cell assembly 200, thus the main board portion 21 is flush with the lower surface of the mounting portion 12. This means the upper surface of the battery cell assembly 200 is lower than the lower surface of the mounting portion 12, i.e., the battery cell assembly 200 is completely below the mounting portion 12. In this way, when the battery device 1000 experiences a side impact, the side beam body 11 deforms towards the clearance space 13, and the mounting portion 12 deforms towards the upper surface of the battery cell assembly 200. This further reduces the probability of the side beam 10 compressing or puncturing the battery cell assembly 200 during deformation. It should be noted that, in the vertical direction, the upward-facing surface of the battery cell assembly 200 is the upper surface of the battery cell assembly 200, and the downward-facing surface of the mounting portion 12 is the lower surface of the mounting portion 12.

[0095] In this embodiment, by setting the lower surface of the main board 21 to be flush with the lower surface of the mounting part 12, the battery cell assembly 200 can be completely located below the mounting part 12. In this way, when the battery device 1000 is involved in a side collision, the side beam body 11 deforms toward the clearance space 13, and the mounting part 12 deforms toward the upper part of the battery cell assembly 200. This further reduces the probability that the side beam 10 will squeeze or puncture the battery cell assembly 200 when it deforms.

[0096] In some embodiments, refer to Figures 5-6 The housing 100 also includes a sealing element 30, which extends in a ring shape along the circumference of the cover plate 20 and abuts and seals between the mounting portion 12 and the connecting plate portion 23.

[0097] Specifically, the seal 30 can be made of a flexible material with certain corrosiveness and compressibility, such as rubber. The seal 30 abuts against the connecting plate 23 and the frame, sealing the gap between the cover plate 20 and the side beam 10, further improving the sealing effect of the cover plate 20 and the side beam 10, thereby further improving the airtight reliability of the battery device 1000. It also effectively prevents external impurities from entering the receiving cavity 101 from the connection between the cover plate 20 and the side beam 10, thus further improving battery reliability. In addition, the seal 30 also provides a buffering effect, reducing direct impact and wear when the mounting part 12 contacts the cover plate 20, helping to extend the service life of the mounting part 12 and the cover plate 20.

[0098] This embodiment improves the sealing effect of the cover plate 20 and the side beam 10 by setting the sealing element 30, thereby further improving the airtight reliability of the battery device 1000. At the same time, it can also effectively prevent impurities outside the battery from entering the receiving cavity 101 from the connection between the cover plate 20 and the side beam 10, thereby further improving the reliability of the battery. In addition, it can also reduce the direct impact and wear when the mounting part 12 contacts the cover plate 20, which helps to extend the service life of the mounting part 12 and the cover plate 20.

[0099] In some embodiments, refer to Figures 5-6 The upper surface of the mounting part 12 has a mounting groove 121, and the sealing element 30 is disposed in the mounting groove 121.

[0100] Specifically, the mounting groove 121 can position and limit the sealing element 30. In this way, when installing the cover plate 20, the sealing element 30 can be fixed in the mounting groove 121 first, and then the cover plate 20 can be assembled. This can prevent the sealing element 30 from shifting due to external force when assembling the cover plate 20, which would cause poor sealing of the housing 100. At the same time, it can also improve the assembly speed of the housing 100.

[0101] In this embodiment, by setting the mounting groove 121, the sealing element 30 can be positioned and limited. In this way, when the cover plate 20 is installed, the sealing element 30 can be prevented from shifting due to external force during the assembly of the cover plate 20, which would cause poor sealing of the box 100. At the same time, the assembly speed of the box 100 can also be improved.

[0102] In some embodiments, refer to Figures 5-6 The upper surface of the mounting part 12 is lower than the upper surface of the side beam body 11.

[0103] It should be noted that, in the vertical direction, the surface of the mounting part 12 facing upward is the upper surface of the mounting part 12, and the surface of the side beam body 11 facing upward is the upper surface of the side beam body 11. That is to say, the mounting part 12 and the side beam body 11 are arranged in a stepped manner.

[0104] In this embodiment, by setting the upper surface of the mounting part 12 to be lower than the upper surface of the side beam body 11, the mounting space above the cover plate 20 can be increased, thereby improving the convenience of assembling the battery device 1000 with the vehicle 1.

[0105] In some embodiments, the battery cell assembly 200 and the mounting portion 12 are spaced apart in the direction of the side beam 10 toward the battery cell assembly 200; or, in the vertical direction, the end of the battery cell assembly 200 toward the side beam 10 is aligned with the end of the mounting portion 12 toward the battery cell assembly 200; or, a portion of the battery cell assembly 200 extends into the clearance space 13.

[0106] For example, in the arrangement of the battery device 1000, the side beam 10 and the battery cell assembly 200 can be arranged in the following three ways:

[0107] In the direction of the side beam 10 toward the battery cell assembly 200, the battery cell assembly 200 and the mounting part 12 are arranged at a distance. There is also a certain space between the clearance space 13 and the battery cell assembly 200 to increase the accommodation space when the side beam 10 deforms, and further reduce the probability of the side beam 10 squeezing or puncturing the battery cell when it deforms.

[0108] In the vertical direction, the end of the battery cell assembly 200 facing the side beam 10 is aligned with the end of the mounting part 12 facing the battery cell assembly 200. The battery cell assembly 200 and the opening of the clearance space 13 facing the battery cell assembly 200 are closely attached. This reduces the probability of the side beam 10 deforming and squeezing or puncturing the battery cell, while also increasing the power distribution space of the battery cell assembly 200 to increase the power of the battery device 1000.

[0109] A portion of the end of the battery cell assembly 200 facing the side beam 10 extends into the clearance space 13, and there is also a gap between the end face of the battery cell assembly 200 and the end face of the side beam body 11, which can further increase the power distribution space of the battery cell assembly 200, and also provide a space to accommodate the deformation of the side beam body 11.

[0110] This embodiment sets up various different positional relationships between the battery cell assembly 200 and the clearance space 13 to reasonably arrange the internal space of the battery device 1000, providing users with a variety of battery device 1000 arrangements.

[0111] In some embodiments, refer to Figure 5 In the vertical direction, the two ends of the clearance space 13 extend beyond the two ends of the battery cell assembly 200.

[0112] For example, the upper and lower ends of the clearance space 13 extend beyond the upper and lower ends of the battery cell assembly 200, that is, the upper and lower ends of the battery cell assembly 200 are respectively arranged opposite to the clearance space 13. When the battery device 1000 is involved in a side collision, the lower end of the side beam body 11 can deform toward the clearance space 13, reducing the probability that the lower end of the side beam body 11 will squeeze or puncture the battery cell assembly 200 when it deforms.

[0113] In this embodiment, by setting the upper and lower ends of the clearance space 13 in the vertical direction to extend beyond the upper and lower ends of the battery cell assembly 200, when the battery device 1000 is involved in a side collision, the mounting part 12 deforms towards the top of the battery cell assembly 200, and the lower end of the side beam body 11 deforms towards the clearance space 13, further reducing the probability of the side beam 10 squeezing or puncturing the battery cell assembly 200 when it deforms.

[0114] In some embodiments, refer to Figure 5 In the direction of the side beam 10 toward the battery cell assembly 200, the depth dimension of the clearance space 13 is D and satisfies: 30mm≤D≤50mm.

[0115] For example, the depth of the clearance space 13 is the dimension of the mounting part 12 in the direction of the side beam 10 toward the battery cell assembly 200. The depth dimension of the clearance space 13 is D and satisfies: 30mm≤D≤50mm, so that the clearance space 13 has sufficient depth to accommodate the deformation of the side beam body 11 when it deforms, which can further reduce the probability of the side beam body 11 squeezing or puncturing the battery cell assembly 200 when it deforms.

[0116] For example, in the direction of the side beam 10 toward the battery cell assembly 200, the depth of the clearance space 13 can be 30mm, 35mm, 40mm, 45mm or 50mm.

[0117] In this embodiment, by setting the clearance space 13 in the direction of the side beam 10 toward the battery cell assembly 200, the depth dimension of the clearance space 13 is D and satisfies: 30mm≤D≤50mm, so that the clearance space 13 has sufficient depth to accommodate the deformation of the side beam body 11 when it deforms, which can further reduce the probability of the side beam body 11 squeezing or puncturing the battery cell assembly 200 when it deforms.

[0118] In some embodiments, refer to Figures 2-3 and Figure 6 The side beam 10 includes two first beam segments 14 that extend in the front-back direction and are spaced apart in the left-right direction, and each of the two first beam segments 14 has an installation part 12 formed thereon.

[0119] Understandably, the two first beam segments 14 are the two side beams 10 of the left and right sides of the battery box 100, mainly used to bear the impact force from the left and right directions, and reduce the probability of damage to the battery cell assembly 200 caused by the side collision of the vehicle 1 or the battery device 1000.

[0120] "The mounting part 12 is formed on both first beam segments 14" means that the mounting part 12 is formed on the two side beams 10 on the left and right sides of the battery cell assembly 200, and the mounting part 12 may or may not be formed on the side beams 10 on the front and rear sides.

[0121] In this embodiment, the side beam 10 is configured to include two first beam segments 14, and each of the two first beam segments 14 has a mounting portion 12. When the vehicle 1 or the battery device 1000 is involved in a side collision, the avoidance space 13 can provide a buffer space, allowing the first beam segments 14 to deform toward the avoidance space 13, thereby reducing the probability of the side beam 10 directly impacting the battery cell assembly 200 and improving the reliability of the battery device 1000.

[0122] In some embodiments, refer to Figures 5-7 The housing 100 also includes a bottom plate assembly 40, which is arranged on the lower side of the side beam 10. The bottom plate assembly 40 is connected to the side beam 10 to jointly define the receiving cavity 101.

[0123] Specifically, the base plate assembly 40 may be just a base plate, or it may include a base plate and a bottom protective plate. The base plate is mainly used to support the battery cell module 200, and the bottom protective plate is mainly used to protect against bottom impacts, which can effectively reduce the safety problems of the battery cell module 200 caused by bottom impacts.

[0124] It should be noted that the base plate assembly 40 is made of sheet metal with a certain strength, and its material can be of various types, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0125] This embodiment, by setting the base plate assembly 40, can further enhance the protective function of the housing 100, thereby increasing the service life of the battery device 1000.

[0126] In some embodiments, refer to Figure 7 The lower end face of the side beam body 11 has a groove 111 that runs through the side wall of the side beam body 11 toward the receiving cavity 101, and the edge of the bottom plate assembly 40 is adapted to fit into the groove 111.

[0127] Understandably, the floor assembly 40 is shielded by the side beam body 11 in the front-to-back and left-to-right directions. It should be noted that the floor assembly 40 and the side beam 10 are generally fastened together by fasteners. Thus, the edge of the floor assembly 40 is adapted to fit into the groove 111, which allows the side beam body 11 to prevent the road surface or obstacles from scraping the fasteners when the vehicle 1 travels on rough roads, thereby effectively reducing the problem of airtightness failure of the housing 100; at the same time, it can also reduce wind resistance, thereby improving the driving stability of the vehicle 1.

[0128] In this embodiment, by setting the groove 111, the side beam body 11 can protect the bottom plate assembly 40, effectively reducing the problem of airtightness failure of the box 100; at the same time, it can also reduce wind resistance, thereby improving the stability of the vehicle 1.

[0129] In some embodiments, refer to Figures 2-3 and Figure 7 The side beam 10 includes two second beam segments 15 that extend in the left-right direction and are spaced apart in the front-back direction, and the second beam segments 15 are formed with grooves 111.

[0130] Specifically, the second beam segment 15 is the front and rear crossbeams of the box body 100. The phrase "grooves 111 are formed on the second beam segment 15" means that the side beam 10 only protects the bottom plate assembly 40 from the front and rear directions. In this way, it can protect the bottom protection assembly while reducing the manufacturing difficulty and cost of the side beam 10.

[0131] In this embodiment, by setting the side beam 10 to include two second beam segments 15, and the second beam segments 15 having grooves 111 formed on them, the side beam 10 can not only protect the bottom protection assembly, but also reduce the manufacturing difficulty and cost of the side beam 10.

[0132] In some embodiments, refer to Figures 5-7 The side beam 10 has multiple cavities 16.

[0133] For example, multiple cavities 16 can be provided, and multiple cavities 16 can extend along the length direction of the side beam 10; multiple cavities 16 can be arranged in the width direction of the side beam 10, and multiple cavities 16 can also be arranged in the vertical direction.

[0134] The cavity 16 can reduce the weight of the side beam 10. At the same time, when the side beam 10 is subjected to a side impact, the cavity 16 can absorb the impact force and reduce the impact force of the side beam 10 on the battery cell assembly 200.

[0135] In this embodiment, a cavity 16 is provided inside the side beam 10. When the side beam 10 is subjected to a side impact, the cavity 16 can absorb the impact force and reduce the impact force of the side beam 10 on the battery cell assembly 200.

[0136] The power supply device according to the second aspect of this application includes: the battery device 1000 of the first aspect of this application.

[0137] According to the electrical device of this application, since the performance of the battery device 1000 is improved, it is beneficial to improve the working power consumption performance of the electrical device.

[0138] In some embodiments, the electrical device is a vehicle 1, the housing 100 is part of the chassis of the vehicle 1, and the side beam 10 is the door sill beam of the vehicle 1.

[0139] In this embodiment, the battery device 1000 is directly integrated into the vehicle 1, eliminating the need for the casing and related components of the traditional battery device 1000, thereby reducing the overall vehicle weight, improving space utilization, and increasing the driving range.

[0140] The following will refer to Figures 2-7 This application describes a battery device 1000 according to two specific embodiments.

[0141] Example 1,

[0142] Reference Figure 5 The battery device 1000 is a battery pack. The battery device 1000 includes a housing 100 and a battery cell assembly 200. The housing 100 has a receiving cavity 101 inside, and the battery cell assembly 200 is arranged in the receiving cavity 101.

[0143] Specifically, the housing 100 includes a side beam 10, which includes a side beam body 11 and a mounting portion 12 protruding into the receiving cavity 101. The upper surface of the mounting portion 12 is lower than the upper surface of the side beam body 11, and the mounting portion 12 cooperates with the side beam body 11 to define a clearance space 13 located below the mounting portion 12. In the direction from the side beam 10 toward the battery cell assembly 200, the battery cell assembly 200 is spaced apart from the mounting portion 12, and in the vertical direction, the battery cell assembly 200 is located below the mounting portion 12.

[0144] The housing 100 also includes a cover plate 20, which is arranged outside the clearance space 13 and connected to the mounting portion 12 to cover the receiving cavity 101. Specifically, the cover plate 20 includes a main plate portion 21, a bent portion 22, and a connecting plate portion 23. The main plate portion 21 is horizontally arranged and flush with the lower surface of the mounting portion 12. One end of the bent portion 22 is connected to the periphery of the main plate portion 21, and the other end of the bent portion 22 extends away from the main plate portion 21. The connecting plate portion 23 is horizontally arranged and connected to the other end of the bent portion 22. The connecting plate portion 23 is located on the upper side of the mounting portion 12 and is fixedly connected to the mounting portion 12.

[0145] The housing 100 also includes a sealing element 30, which extends in a ring shape along the circumference of the cover plate 20 and abuts and seals between the mounting portion 12 and the connecting plate portion 23. Specifically, a mounting groove 121 is formed on the upper surface of the mounting portion 12, and the sealing element 30 is fitted into the mounting groove 121.

[0146] The housing 100 also includes a bottom plate assembly 40, which is arranged on the lower side of the side beam 10 and is connected to the side beam 10 to jointly define the receiving cavity 101. The lower end face of the side beam body 11 has a groove 111 that passes through the side wall of the side beam body 11 facing the receiving cavity 101, and the edge of the bottom plate assembly 40 extends into the groove 111 and is fixedly connected to the side beam body 11.

[0147] It should be noted that the side beam 10 includes two first beam segments 14 extending in the front-back direction and spaced apart in the left-right direction, and two second beam segments 15 extending in the left-right direction and spaced apart in the front-back direction. Each of the two first beam segments 14 has a mounting part 12, and the second beam segments 15 have grooves 111 formed on them.

[0148] According to the battery device 1000 of this application, by providing a clearance space 13, the side beam 10 of the battery device 1000 can deform toward the clearance space 13 when a side collision occurs, reducing the probability of the side beam 10 directly impacting the battery cell assembly 200, thereby improving the reliability of the battery device 1000. At the same time, a part of the battery cell assembly 200 can extend into the clearance space 13, thus increasing the power distribution space of the battery cell assembly 200, thereby increasing the power capacity of the battery device 1000. In addition, by setting the cover plate 20 on the outside of the clearance space 13 and connecting it to the mounting part 12, the cover plate 20 does not occupy the space of the clearance space 13, thereby further improving the deformation and power distribution of the clearance space 13. At the same time, it is also beneficial to connect the cover plate 20 to the mounting part 12, thereby reducing the assembly difficulty of the housing 100, simplifying the assembly steps of the battery device 1000, and increasing the assembly speed of the battery device 1000.

[0149] Example 2,

[0150] This embodiment has a structure that is largely the same as that of Embodiment 1, with the same components using the same reference numerals. The only difference is that the battery device 1000 described in Embodiment 1 is a battery pack integrated on the lower side of the vehicle 1, while the battery device 1000 in this Embodiment 2 is directly integrated onto the vehicle 1.

[0151] Specifically, the housing 100 of the battery device 1000 is part of the chassis structure of the vehicle 1, and the side beam 10 of the housing 100 is the door sill beam of the vehicle 1.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A housing (100) defining a receiving cavity (101) with an opening on one side, the housing (100) comprising: Side beam (10), the side beam (10) includes a side beam body (11) and a mounting part (12) protruding into the receiving cavity (101), the mounting part (12) cooperates with the side beam body (11) to define a clearance space (13) located on the lower side of the mounting part (12); A cover plate (20) is arranged on the outside of the clearance space (13) and connected to the mounting part (12) to cover the receiving cavity (101); A battery cell assembly (200) is disposed within the receiving cavity (101), and at least a portion of the battery cell assembly (200) is located below the mounting portion (12) in the vertical direction.

2. The battery device according to claim 1, characterized in that, The cover plate (20) is connected to the side of the mounting part (12) away from the clearance space (13).

3. The battery device according to claim 2, characterized in that, The cover plate (20) includes: a main board part (21), a bending part (22) and a connecting plate part (23). The main board part (21) is horizontally arranged. One end of the bending part (22) is connected to the periphery of the main board part (21). The other end of the bending part (22) extends away from the main board part (21). The connecting plate part (23) is horizontally arranged and connected to the other end of the bending part (22). The connecting plate part (23) is located on the upper side of the mounting part (12) and is fixedly connected to the mounting part (12).

4. The battery device according to claim 3, characterized in that, The lower surface of the main board (21) is flush with the lower surface of the mounting part (12).

5. The battery device according to claim 3, characterized in that, The housing (100) further includes a sealing element (30), which extends in a ring shape along the circumference of the cover plate (20) and abuts and seals between the mounting portion (12) and the connecting plate portion (23).

6. The battery device according to claim 5, characterized in that, The upper surface of the mounting part (12) is formed with a mounting groove (121), and the sealing element (30) is disposed in the mounting groove (121).

7. The battery device according to claim 1, characterized in that, The upper surface of the mounting part (12) is lower than the upper surface of the side beam body (11).

8. The battery device according to claim 1, characterized in that, In the direction from the side beam (10) toward the battery cell assembly (200), the battery cell assembly (200) and the mounting portion (12) are arranged at a distance; or, In the vertical direction, the end of the battery cell assembly (200) facing the side beam (10) is aligned with the end of the mounting portion (12) facing the battery cell assembly (200); or, A portion of the battery cell assembly (200) extends into the clearance space (13).

9. The battery device according to claim 1, characterized in that, The side beam (10) includes two first beam segments (14) that extend in the front-back direction and are spaced apart in the left-right direction, and the mounting part (12) is formed on each of the two first beam segments (14).

10. The battery device according to any one of claims 1-9, characterized in that, The housing (100) further includes a bottom plate assembly (40), which is arranged on the lower side of the side beam (10) and is connected to the side beam (10) to jointly define the receiving cavity (101).

11. The battery device according to claim 10, characterized in that, The lower end face of the side beam body (11) is formed with a groove (111) that passes through the side wall of the side beam body (11) facing the receiving cavity (101), and the edge of the bottom plate assembly (40) is adapted to fit into the groove (111).

12. The battery device according to claim 11, characterized in that, The side beam (10) includes two second beam segments (15) that extend in the left-right direction and are spaced apart in the front-back direction, and the second beam segments (15) are formed with the grooves (111).

13. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-12.

14. The electrical appliance according to claim 13, characterized in that, The electrical device is a vehicle (1), the housing (100) is part of the chassis of the vehicle (1), and the side beam (10) is the door sill beam of the vehicle (1).

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