Battery device and vehicle

Abstract

This application discloses a battery device and a vehicle. The battery device includes a housing, a first locking mechanism, a second locking mechanism, and multiple battery cells housed within the housing. The housing includes a first beam, a second beam, and two third beams. The first and second beams are respectively located on both sides of the multiple battery cells along a first direction, and the two third beams are respectively located on both sides of the multiple battery cells along a second direction. Each third beam connects the first and second beams. Along the first direction, the first beam is closer to the multiple battery cells than the second beam. The first locking mechanism is located on the side of the first beam away from the second beam and is connected to the first beam. The second locking mechanism is located on the side of the third beam away from the multiple battery cells and is connected to the third beam. In the first direction, the minimum distance between the second locking mechanism and the second beam is less than the minimum distance between the second locking mechanism and the first beam, and a gap space is formed on the side of the second locking mechanism closer to the first beam. This application is beneficial for improving the replacement efficiency of the battery device.

Description

Technical Field

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

[0002] There are two main ways to replenish energy for new energy vehicles: charging and battery swapping. Battery swapping, as the most efficient method currently available, perfectly meets the needs of scenarios where charging time is critical. In addition to its short charging time, battery swapping also offers multiple advantages such as high safety and grid-friendliness. In scenarios where the vehicle and battery are separated, battery swapping can significantly reduce the initial purchase cost of new energy vehicles.

[0003] In the development of battery swapping technology, how to improve the replacement efficiency of battery devices has always been a research direction in the industry. Utility Model Content

[0004] This application provides a battery device and a vehicle that improves the battery replacement efficiency.

[0005] In a first aspect, this application provides a battery device comprising a housing, a first locking mechanism, a second locking mechanism, and a plurality of battery cells. The plurality of battery cells are housed within the housing. The housing includes a first beam, a second beam, and two third beams. The first and second beams are respectively disposed on opposite sides of the plurality of battery cells along a first direction, and the two third beams are respectively disposed on opposite sides of the plurality of battery cells along a second direction, perpendicular to the first direction. Each third beam connects the first and second beams. Along the first direction, the first beam is closer to the plurality of battery cells than the second beam. The first locking mechanism is disposed on the side of the first beam away from the second beam and is connected to the first beam. The second locking mechanism is disposed on the side of the third beam away from the plurality of battery cells and is connected to the third beam. In the first direction, the minimum distance between the second locking mechanism and the second beam is less than the minimum distance between the second locking mechanism and the first beam, and a gap space is formed on the side of the second locking mechanism closer to the first beam.

[0006] In this embodiment, the second locking mechanism is offset towards the second beam, creating a gap space on the side of the second locking mechanism closest to the first beam. During battery replacement, a portion of the battery swapping device can extend into this gap space and dock with the vehicle body, enabling precise positioning and facilitating rapid locking of the battery device to be replaced within the vehicle, thus improving replacement efficiency. The first locking mechanism, connected to the first beam, provides support in a first direction on the side closest to the first beam, mitigating the imbalance in battery device support caused by the offset of the second locking mechanism. The combination of the first and second locking mechanisms enhances the stability of the battery device's support.

[0007] In some embodiments, the housing defines a first receiving space and a second receiving space arranged along a first direction; the battery device includes a first expansion beam connected to the housing and located between the first and second receiving spaces, the first receiving space being located on the side of the first expansion beam closest to the first beam, and multiple battery cells are received in the first receiving space. The first expansion beam can exert a pre-compression effect on the multiple battery cells along the first direction, which helps to maintain a balance of contact pressure between the multiple battery cells and reduces the risk of loosening of the stacked multiple battery cells. The first expansion beam can also absorb the pressure generated by the expansion of the battery cells through deformation, reducing the risk of the expansion force being transmitted to the housing, causing housing deformation or affecting the housing's sealing performance.

[0008] In some embodiments, the second locking mechanism includes a plurality of locking attachments arranged along a first direction, wherein the locking attachment closest to the second beam among the plurality of locking attachments is the first locking attachment; the first expansion beam includes a first surface facing the first receiving space, and in a direction along the first beam pointing towards the second beam and parallel to the first direction, at least a portion of the first locking attachment extends beyond the first surface. The first locking attachment is closer to the second beam than the plurality of battery cells, which helps to match the center of gravity of the plurality of battery cells, so that the weight of the plurality of battery cells acts on the second locking mechanism, thereby improving the support stability of the battery device.

[0009] In some embodiments, within the same projection plane perpendicular to the second direction, the orthographic projection of the first locking attachment at least partially coincides with the orthographic projection of the first expansion beam. The load of the housing can be transferred at least partially via the first expansion beam to the vicinity of the first locking attachment, which helps to strengthen the support.

[0010] In some embodiments, the second locking mechanism includes a first supporting beam and a plurality of locking attachments. The first supporting beam is connected to a third beam and extends along a first direction. The plurality of locking attachments are disposed on the first supporting beam and spaced apart along the first direction. This allows the battery device to be supported at multiple different positions in the first direction, which helps improve support stability. The fact that multiple locking attachments are disposed on the same first supporting beam helps to extend the length of the first supporting beam in the first direction, increasing the overall strength of the first supporting beam and thus improving the support strength of the second locking mechanism.

[0011] In some embodiments, the first load-bearing beam and the third beam are integrally formed. This simplifies the assembly process and improves the connection strength between the first load-bearing beam and the box body. The first load-bearing beam has a relatively long length along the first direction, and the integral forming process of the first load-bearing beam and the third beam also reduces material waste.

[0012] In some embodiments, along the first direction, the size of the first load-bearing beam is L1, and the size of the box body is L2, where 0.5 ≤ L1 / L2 ≤ 0.9. A ratio of L1 / L2 greater than or equal to 0.5 is beneficial for improving the supporting strength of the first load-bearing beam. A ratio of L1 / L2 less than or equal to 0.9 is beneficial for increasing the size of the space in the first direction, reducing the risk of partial structural interference between the first load-bearing beam and the battery swapping device during the battery swapping process.

[0013] In some embodiments, the plurality of locking accessories includes a first locking accessory, a second locking accessory, a third locking accessory, and a fourth locking accessory, arranged sequentially along the direction from the second beam to the first beam. The first supporting beam includes a first part and a second part, the first part being located between the first and second locking accessories, and the second part being located between the third and fourth locking accessories. Both the first and second parts are provided with positioning parts. The positioning part of one of the first and second parts is used for positioning with the vehicle body, and the positioning part of the other part is used for positioning with the battery swapping device. This improves the positioning effect between the battery device and the vehicle body, as well as between the battery device and the battery swapping device, thereby improving the battery replacement efficiency.

[0014] In some embodiments, there are two second locking mechanisms, each connected to a third beam. The positions of multiple locking attachments of the two second locking mechanisms are symmetrically arranged along a second direction. One second locking mechanism has a first positioning part and a second positioning part respectively in its first and second parts, while the other second locking mechanism has a second positioning part and a first positioning part respectively in its first and second parts. One of the first and second positioning parts is used for positioning with the vehicle body, and the other is used for positioning with the battery swapping device. Thus, the two second locking mechanisms can simultaneously engage with the vehicle body at diagonally opposite positions, and simultaneously engage with the battery swapping device at diagonally opposite positions, which improves the positioning effect.

[0015] In some embodiments, along the first direction, the minimum distance between the first and second locking accessories is d1, the minimum distance between the second and third locking accessories is d2, and the minimum distance between the third and fourth locking accessories is d3, where d2 < d1 and d2 < d3. Both d1 and d3 are greater than d2, which is beneficial for increasing the dimensions of the first and second parts along the first direction, thereby providing flexible positioning space for the positioning part and reducing the risk of interference between the positioning part or the positioning structure cooperating with the positioning part and the locking accessories.

[0016] In some embodiments, along the first direction, the distance between the second locking mechanism and the surface of the first beam away from the second beam is d4, and the size of the housing is L2, where 0.1 ≤ d4 / L2 ​​≤ 0.5. A d4 / L2 ​​greater than or equal to 0.1 is beneficial for increasing the size of the space along the first direction, reducing the risk of interference between the first load-bearing beam and the vehicle body or battery swapping device during the battery swapping process. A d4 / L2 ​​less than or equal to 0.5 is beneficial for increasing the size of the first load-bearing beam in the first direction, improving the supporting strength of the first load-bearing beam.

[0017] In some embodiments, the first locking mechanism includes a second supporting beam and a fifth locking accessory. The second supporting beam is welded to the first beam, and the fifth locking accessory is disposed on the second supporting beam. The number of locking accessories disposed on the second supporting beam is relatively small, the dimension of the second supporting beam along the second direction is relatively small, and the second supporting beam is independently formed and welded to the first beam, which helps to save material for the second supporting beam and reduces material waste compared to a method where the second supporting beam and the first beam are integrally formed.

[0018] In some embodiments, the first locking mechanism includes a second supporting beam and a fifth locking accessory. The second supporting beam is connected to the first beam, and the fifth locking accessory is disposed on the second supporting beam. There are at least two first locking mechanisms. Along the second direction, the sum of the dimensions of the second supporting beams of all the first locking mechanisms is L3, and the dimension of the housing is L4, where 0.1 ≤ L3 / L4 ≤ 0.8. A L3 / L4 ratio greater than or equal to 0.1 is beneficial for improving the overall support strength of the at least two first locking mechanisms. A L3 / L4 ratio less than or equal to 0.8 is beneficial for reducing the space occupied by the first locking mechanisms, reducing the risk of interference between the first locking mechanisms and the vehicle body or battery swapping device, and also saving material costs.

[0019] In some embodiments, there are two first locking mechanisms, which are spaced apart and symmetrically arranged along a second direction. This improves the support stability of the battery device in the second direction.

[0020] In some embodiments, along the first direction, the size of the box is L2, 1500mm≤L2≤2500mm; along the second direction, the size of the box is L4, 800mm≤L4≤1700mm, wherein L4<L2.

[0021] Secondly, embodiments of this application provide a vehicle including a vehicle body and a battery device provided according to any embodiment of the first aspect, wherein a first locking mechanism and a second locking mechanism are detachably locked to the vehicle body.

[0022] In some embodiments, the vehicle body has a docking portion for docking with a battery swapping device; the docking portion and the interval space are correspondingly arranged along the height direction of the vehicle, and the height direction, the first direction, and the second direction of the vehicle are perpendicular to each other. During the process of replacing the battery device in the vehicle, a portion of the battery swapping device can extend into the interval space and dock with the docking portion, thereby achieving precise positioning with the vehicle body. This facilitates quickly locking the position of the battery device to be replaced on the vehicle body and improves battery swapping efficiency.

[0023] In some embodiments, the first direction is parallel to the vehicle's direction of travel, and the first beam is closer to the front of the vehicle body than the second beam. Attached Figure Description

[0024] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0025] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0026] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0027] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the battery device shown.

[0028] Figure 4 for Figure 3 A magnified structural diagram of region A in the middle;

[0029] Figure 5 for Figure 2 A schematic diagram of the first housing portion of the battery device shown;

[0030] Figure 6 for Figure 5 The diagram shows the dimensions of the first housing section.

[0031] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0032] Vehicle 1, battery unit 2, controller 3, motor 4;

[0033] Car body 6, docking part 61;

[0034] Box body 10, first box body part 10a, second box body part 10b, first accommodating space 10c, second accommodating space 10d, first beam 11, second beam 12, third beam 13, straight part 131, inclined part 132, bottom plate 14, and partition space 15.

[0035] 20 battery cells;

[0036] First locking mechanism 30, second bearing beam 31, fifth locking accessory 32, second lifting hole 33;

[0037] Second locking mechanism 40, first locking accessory 41, second locking accessory 42, third locking accessory 43, fourth locking accessory 44, first load-bearing beam 45, first part 451, second part 452, first positioning part 461, second positioning part 462, first lifting hole 47;

[0038] First expansion beam 51, first surface 511, beam body 512, connecting part 513;

[0039] Second expansion beam 52;

[0040] Third expansion beam 53;

[0041] First direction X, second direction Y, third direction Z. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0044] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "adhesion" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0048] In this application, "multiple" means two or more (including two).

[0049] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0050] In this embodiment of the application, the battery cell can be a secondary battery cell, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.

[0051] The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but the embodiments of this application are not limited to this.

[0052] A typical battery cell includes an electrode assembly, a housing, and electrode terminals. The electrode assembly is housed within the housing, and the electrode terminals are located within the housing. The housing encapsulates the electrode assembly and electrolyte components. The electrode assembly includes tabs, which are electrically connected to the electrode terminals via adapters or directly to the electrode terminals. The electrode terminals are used to electrically connect the electrode assembly to external circuitry within the battery cell to enable charging or discharging of the battery cell.

[0053] The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0054] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0055] In some embodiments, the negative electrode may be a negative electrode sheet, which may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0056] In some implementations, the separator is positioned between the positive and negative electrodes.

[0057] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0058] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0059] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0060] In some embodiments, the electrode assembly has a stacked structure.

[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 multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0062] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0063] A battery device typically includes a housing for encapsulating one or more individual battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the individual battery cells.

[0064] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties. The battery cell assembly can be housed within a housing by fixing the battery module within the housing. As an example, the housing can include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, creating a closed space inside the housing to house the battery cell assembly.

[0065] The battery mounting mechanism, as a key structure connecting the battery pack to the vehicle, affects the stability of the battery pack's support. The compatibility of the mounting mechanism with different vehicle models determines the applicable scenarios and scalability of the battery pack.

[0066] In a battery pack, individual battery cells and most electrical components, such as relays, master controllers, and slave controllers, are typically arranged separately. Because individual battery cells are usually quite heavy, the center of gravity of the battery pack tends to be biased towards the side where the battery cells are located. To stably support the battery pack, the placement of the locking mechanism needs to take the battery pack's center of gravity into account. For some vehicle models, during battery swapping, the locking mechanism can easily interfere with parts of the battery swapping device, affecting the swapping process and efficiency.

[0067] In view of this, this application provides a technical solution that involves placing a first locking mechanism closer to the multiple battery cells on the first beam of the housing, and offsetting a second locking mechanism on the third beam of the housing towards the second beam away from the multiple battery cells. This creates a gap space on the side of the second locking mechanism closer to the first beam. During battery replacement, a portion of the battery swapping device can extend into this gap space to dock with the vehicle body, enabling precise positioning and facilitating rapid locking of the battery device to be replaced within the vehicle, thus improving battery replacement efficiency. The combination of the first and second locking mechanisms also enhances the support stability of the battery device.

[0068] The technical solutions provided in this application are applicable to battery devices and vehicles using battery devices.

[0069] Figure 1 This is a structural schematic diagram of a vehicle provided in some embodiments of this application. (Refer to...) Figure 1Vehicle 1 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 2 is installed inside vehicle 1, and the battery device 2 can be located at the bottom, front, or rear of vehicle 1. The battery device 2 can be used to power vehicle 1; for example, the battery device 2 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0070] In some embodiments of this application, the battery device 2 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] Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application. (Refer to...) Figure 2 The battery device 2 includes a housing 10, multiple battery cells 20, a first locking mechanism 30, and a second locking mechanism 40. The multiple battery cells 20 are housed within the housing 10. The housing 10 includes a first beam 11, a second beam 12, and two third beams 13. The first beam 11 and the second beam 12 are respectively located on both sides of the multiple battery cells 20 along a first direction X. The two third beams 13 are respectively located on both sides of the multiple battery cells 20 along a second direction Y, which is perpendicular to the first direction X. Each third beam 13 connects to the first beam 11 and the second beam 12. Along the first direction X, the first beam 11 is closer to the multiple battery cells 20 than the second beam 12. The first locking mechanism 30 is located on the side of the first beam 11 away from the second beam 12 and is connected to the first beam 11. The second locking mechanism 40 is located on the side of the third beam 13 away from the multiple battery cells 20 and is connected to the third beam 13. In the first direction X, the minimum distance between the second locking mechanism 40 and the second beam 12 is less than the minimum distance between the second locking mechanism 40 and the first beam 11, and the second locking mechanism 40 forms an interval space 15 on the side closer to the first beam 11.

[0072] The housing 10 provides a space for housing individual battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing portion 10a and a second housing portion 10b, which overlap each other, and together define a space for accommodating multiple battery cells 20. The second housing portion 10b may be a hollow structure with one end open, and the first housing portion 10a may be a plate-like structure, with the first housing portion 10a covering the open side of the second housing portion 10b, so that the first housing portion 10a and the second housing portion 10b together define the space; alternatively, the first housing portion 10a and the second housing portion 10b may both be hollow structures with one side open, with the open side of the first housing portion 10a covering the open side of the second housing portion 10b. Optionally, the housing 10 formed by the first housing portion 10a and the second housing portion 10b may be a cuboid.

[0073] To improve the sealing performance after the first housing part 10a and the second housing part 10b are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 10a and the second housing part 10b.

[0074] Assuming that the first box part 10a covers the top of the second box part 10b, the first box part 10a can also be called the upper box cover, and the second box part 10b can also be called the lower box.

[0075] In the battery device 2, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 2 can also consist of multiple battery cells 20 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 2 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0076] For example, the battery cell 20 may be the smallest unit that makes up the battery device 2.

[0077] Optionally, the second housing portion 10b includes a first beam 11, a second beam 12, and two third beams 13. The second housing portion 10b also includes a base plate 14, which is connected to the first beam 11, the second beam 12, and the two third beams 13. An opening is formed on the side of the second housing portion 10b opposite to the base plate 14, and the first housing portion 10a covers the opening of the second housing portion 10b.

[0078] Optionally, each of the third beams 13 is connected to the first beam 11 and the second beam 12 by welding, screwing, or other suitable means. The first beam 11, the second beam 12, and the two third beams 13 may also be integrally formed.

[0079] Optionally, the third beam 13 includes a straight portion 131 and an inclined portion 132. The straight portion 131 extends along a first direction X, and the inclined portion 132 is inclined relative to the straight portion 131. The inclined portion 132 connects the straight portion 131 and the second beam 12. Alternatively, the third beam 13 extends straight along the first direction X throughout.

[0080] At least some of the multiple battery cells 20 are stacked along a first direction X. In the first direction X, the multiple battery cells 20 are closer to the first beam 11 within the housing 10 than to the second beam 12. In the first direction X, the center of gravity of the battery assembly 2 is biased towards the direction of the first beam 11.

[0081] The first locking mechanism 30 and the second locking mechanism 40 are used to lock onto the vehicle body to connect the battery device 2 to the vehicle body. Optionally, both the first locking mechanism 30 and the second locking mechanism 40 include at least one locking accessory, each of which can be detachably connected to the vehicle body.

[0082] Optionally, the first locking mechanism 30 is connected to the first beam 11 by welding, screw connection, or other suitable means. Alternatively, a portion of the first locking mechanism 30 may also be integrally formed with the first beam 11.

[0083] Optionally, the second locking mechanism 40 is connected to the third beam 13 by welding, screwing, or other suitable means. Alternatively, a portion of the second locking mechanism 40 may also be integrally formed with the third beam 13.

[0084] In some examples, there is one second locking mechanism 40, which is connected to one of the third beams 13. To improve support stability, the other third beam 13 may be connected to other locking mechanisms or support mechanisms.

[0085] In other examples, there are two second locking mechanisms 40, each connected to one of the two third beams 13.

[0086] The minimum distance between the second locking mechanism 40 and the second beam 12 refers to the distance along the first direction X between the portion of the second locking mechanism 40 closest to the second beam 12 and the surface of the second beam 12 closest to the first beam 11. The minimum distance between the second locking mechanism 40 and the first beam 11 refers to the distance along the first direction X between the portion of the second locking mechanism 40 closest to the first beam 11 and the surface of the first beam 11 closest to the second beam 12.

[0087] The gap space 15 is used to avoid part of the structure of the battery swapping device. Optionally, the gap space 15 is used to avoid part of the structure of the battery swapping device during the process of changing the battery device in the vehicle.

[0088] The partition space 15 is located on the side of the second locking mechanism 40 near the first beam 11, extending from the end of the second locking mechanism 40 near the first beam 11 to the first beam 11. The third beam 13 and the second locking mechanism 40 enclose the partition space 15. The partition space 15 is open along the first direction X, away from the second locking mechanism 40, and along the second direction Y, away from the third beam 13. No other structures are provided within the partition space 15.

[0089] In the first direction X, the minimum distance between the second locking mechanism 40 and the second beam 12 is less than the minimum distance between the second locking mechanism 40 and the first beam 11. Compared to the first beam 11, the second locking mechanism 40 is generally closer to the second beam 12. The second locking mechanism 40 is offset towards the second beam 12, forming an interval space 15 on the side of the second locking mechanism 40 closer to the first beam 11. During the battery replacement process, part of the battery swapping device can extend into this interval space 15 and dock with the vehicle body, thereby achieving precise positioning with the vehicle body. This facilitates quickly locking the position of the battery device 2 to be replaced on the vehicle body and improves the battery replacement efficiency.

[0090] The first locking mechanism 30 is connected to the first beam 11 and can form a support on the side close to the first beam 11 in the first direction X, which improves the problem of unbalanced support of the battery device 2 caused by the offset of the second locking mechanism 40. The combination of the first locking mechanism 30 and the second locking mechanism 40 is beneficial to improving the support stability of the battery device 2.

[0091] In some embodiments, the second beam 12 does not have a locking mechanism. A first locking mechanism 30 is connected to the first beam 11, and a second locking mechanism 40 is closer to the second beam 12. The combination of the first locking mechanism 30 and the second locking mechanism 40 provides stable support for the battery device 2 in the first direction X. Therefore, the absence of a locking mechanism on the second beam 12 does not affect the support stability of the battery device 2 and reduces the risk of interference between the battery device 2 and the vehicle body or other structures, thus further improving the adaptability of the battery device 2.

[0092] In some embodiments, the housing 10 defines a first receiving space 10c and a second receiving space 10d arranged along a first direction X. The battery device 2 includes a first expansion beam 51 connected to the housing 10 and located between the first receiving space 10c and the second receiving space 10d. The first receiving space 10c is located on the side of the first expansion beam 51 near the first beam 11, and a plurality of battery cells 20 are received in the first receiving space 10c.

[0093] The first expansion beam 51 extends along the second direction Y, and its two ends along the second direction Y can be connected to two third beams 13 respectively. The first expansion beam 51 is also connected to the base plate 14.

[0094] Optionally, the first accommodating space 10c is enclosed by the first expansion beam 51, the first beam 11, a portion of the two third beams 13, a portion of the bottom plate 14, and a portion of the first box body 10a; the second accommodating space 10d is enclosed by the first expansion beam 51, the second beam 12, a portion of the two third beams 13, a portion of the bottom plate 14, and a portion of the first box body 10a.

[0095] The first accommodating space 10c is the battery compartment of the battery device 2, used to accommodate multiple battery cells 20. The second accommodating space 10d can be the electrical compartment of the battery device 2, used to accommodate electrical components of the battery device 2, such as high-voltage boxes.

[0096] In this embodiment, a first expansion beam 51 separates the first accommodating space 10c and the second accommodating space 10d. The first expansion beam 51 can exert a pre-compression effect on multiple battery cells 20 along the first direction X, which helps to maintain the balance of contact pressure between the multiple battery cells 20 and reduces the risk of loosening of the stacked multiple battery cells 20. The first expansion beam 51 can also absorb the pressure generated by the expansion of the battery cells 20 through deformation, reducing the risk that the expansion force will be transmitted to the housing 10, causing deformation of the housing 10 or affecting the sealing performance of the housing 10.

[0097] In some embodiments, the battery device 2 further includes a second expansion beam 52, which is connected to the housing 10 and disposed between the plurality of battery cells 20 and the first beam 11. The second expansion beam 52 and the first expansion beam 51 are respectively disposed on both sides of the plurality of battery cells 20 along the first direction X. The first receiving space 10c is enclosed by the first expansion beam 51, the second expansion beam 52, a portion of the two third beams 13, a portion of the bottom plate 14, and a portion of the first housing portion 10a.

[0098] Optionally, the second expansion beam 52 and the first beam 11 are integrally formed.

[0099] In some embodiments, the battery device 2 further includes a third expansion beam 53, and the first receiving space 10c includes a plurality of subspaces, with the third expansion beam 53 disposed between adjacent subspaces.

[0100] In some embodiments, the second locking mechanism 40 includes a plurality of locking attachments arranged along a first direction X, wherein the locking attachment closest to the second beam 12 is the first locking attachment 41. The first expansion beam 51 includes a first surface 511 facing the first receiving space 10c, extending along the first beam 11 toward the second beam 12 and parallel to the first direction X, and at least a portion of the first locking attachment 41 extends beyond the first surface 511.

[0101] The multiple locking attachments of the second locking mechanism 40 may have the same or different structures. Optionally, the locking attachments may be structures capable of quickly locking or releasing with the vehicle body. The locking attachments can switch between a locked state and a released state; in the locked state, the locking attachments can lock onto the vehicle body, and in the released state, the locking attachments can separate from the vehicle body. For example, the locking attachments are generally T-shaped.

[0102] The multiple locking attachments of the second locking mechanism 40 are spaced apart along the first direction X, and can support the battery device 2 at multiple different positions in the first direction X, which helps to improve the stability of the support.

[0103] The first locking accessory 41 is closest to the second beam 12. The end of the battery device 2 closest to the second beam 12 is mainly supported by the cooperation of the first locking accessory 41 and the vehicle body. The position of the first locking accessory 41 affects the support stability of the battery device 2.

[0104] Along the direction from the first beam 11 to the second beam 12, at least a portion of the first locking attachment 41 extends beyond the first surface 511. If the multiple battery cells 20 are considered as a whole, at least a portion of the first locking attachment 41 extends beyond the multiple battery cells 20. The first locking attachment 41 is closer to the second beam 12 than the multiple battery cells 20, which helps to match the center of gravity of the multiple battery cells 20, allowing the weight of the multiple battery cells 20 to act on the second locking mechanism 40, thereby improving the support stability of the battery device 2.

[0105] In some embodiments, in the same projection plane perpendicular to the second direction Y, the orthographic projection of the first locking attachment 41 at least partially coincides with the orthographic projection of the first expansion beam 51. The load of the housing 10 can be transferred at least partially via the first expansion beam 51 to the vicinity of the first locking attachment 41, which helps to strengthen the support.

[0106] Optionally, in the same projection plane perpendicular to the second direction Y, the orthographic projection of the center position of the first locking attachment 41 along the first direction X is located within the orthographic projection of the first expansion beam 51.

[0107] Optionally, the center position of the first locking attachment 41 along the first direction X and the center position of the first expansion beam 51 along the first direction X are on the same straight line extending along the second direction Y.

[0108] The center position of the first expansion beam 51 along the first direction X refers to the center position of the main structure of the first expansion beam 51 in the first direction X. Optionally, the first expansion beam 51 includes a beam body 512 and a connecting part 513. The connecting part 513 is located on one side of the beam body 512 along the third direction Z and is connected to the box body 10. The third direction Z is perpendicular to the first direction X and the second direction Y. The third direction Z may be parallel to the height direction of the vehicle. The center position of the first expansion beam 51 along the first direction X refers to the center position of the beam body 512 along the first direction X.

[0109] Similarly, the center position of the first lock accessory 41 along the first direction X refers to the center position of the main structure of the first lock accessory 41 along the first direction X.

[0110] In some embodiments, the second locking mechanism 40 includes a first supporting beam 45 and a plurality of locking attachments. The first supporting beam 45 is connected to the third beam 13 and extends along a first direction X. The plurality of locking attachments are disposed on the first supporting beam 45 and are spaced apart along the first direction X.

[0111] The first load-bearing beam 45 can be connected to the third beam 13 by welding, riveting, screwing or other suitable means, or it can be integrally formed with the third beam 13.

[0112] Each locking accessory is movably mounted on the first load-bearing beam 45 to facilitate switching between the locked and released states.

[0113] Multiple locking attachments are spaced apart along the first direction X, providing support for the battery device 2 at multiple different positions along the first direction X, which helps improve support stability. The multiple locking attachments are located on the same first supporting beam 45, which helps extend the length of the first supporting beam 45 along the first direction X, increasing the overall strength of the first supporting beam 45, thereby improving the support strength of the second locking mechanism 40.

[0114] In some embodiments, along the direction from the second beam 12 to the first beam 11, the locking attachment closest to the first beam 11 does not extend beyond the end face of the first supporting beam 45 near the first beam 11. Similarly, along the direction from the first beam 11 to the second beam 12, the locking attachment closest to the second beam 12 does not extend beyond the end face of the first supporting beam 45 near the second beam 12.

[0115] The minimum distance between the second locking mechanism 40 and the first beam 11 is d5, which is the distance between the end face of the first bearing beam 45 near the first beam 11 and the surface of the first beam 11 near the second beam 12. The minimum distance between the second locking mechanism 40 and the second beam 12 is d6, which is the distance between the end face of the first bearing beam 45 near the second beam 12 and the surface of the second beam 12 near the first beam 11, where d6 < d5.

[0116] In some embodiments, the first load-bearing beam 45 and the third beam 13 are integrally formed.

[0117] The first load-bearing beam 45 and the third beam 13 can be integrally formed by extrusion, stamping or other suitable methods.

[0118] The first load-bearing beam 45 and the third beam 13 are integrally formed, which simplifies the assembly process and improves the connection strength between the first load-bearing beam 45 and the box body 10. The first load-bearing beam 45 has a relatively long length along the first direction X, and the integral forming process of the first load-bearing beam 45 and the third beam 13 can also reduce material waste.

[0119] In some embodiments, along the first direction X, the first load-bearing beam 45 has a dimension of L1, the box body 10 has a dimension of L2, and 0.5≤L1 / L2≤0.9.

[0120] Optionally, L1 / L2 can be 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9 or any value between two of these.

[0121] In this embodiment, setting L1 / L2 to be greater than or equal to 0.5 is beneficial for improving the support strength of the first load-bearing beam 45. Setting L1 / L2 to be less than or equal to 0.9 in this embodiment is beneficial for increasing the size of the spacing space 15 in the first direction X, reducing the risk of partial structural interference between the first load-bearing beam 45 and the battery swapping device during the battery swapping process. Setting L1 / L2 to 0.5-0.9 in this embodiment is beneficial for achieving a balance between improving the support strength of the first load-bearing beam 45 and reducing the risk of interference between the first load-bearing beam 45 and the battery swapping device.

[0122] In some embodiments, the plurality of locking accessories include a first locking accessory 41, a second locking accessory 42, a third locking accessory 43, and a fourth locking accessory 44, arranged sequentially along the direction from the second beam 12 to the first beam 11. The first load-bearing beam 45 includes a first portion 451 and a second portion 452, the first portion 451 being located between the first locking accessory 41 and the second locking accessory 42, and the second portion 452 being located between the third locking accessory 43 and the fourth locking accessory 44. Both the first portion 451 and the second portion 452 are provided with positioning parts.

[0123] The structures of the first lock accessory 41, the second lock accessory 42, the third lock accessory 43, and the fourth lock accessory 44 may be the same or different.

[0124] The first lock accessory 41, the second lock accessory 42, the third lock accessory 43, and the fourth lock accessory 44 can be arranged at equal intervals along the first direction X, or they can be arranged at non-equal intervals.

[0125] The positioning unit is used to cooperate with the vehicle body and / or the battery swapping device for positioning the battery device 2 to be replaced onto the vehicle body.

[0126] Optionally, one of the positioning part provided in the first part 451 and the positioning part provided in the second part 452 is used for positioning in conjunction with the vehicle body, and the other is used for positioning in conjunction with the battery swapping device.

[0127] The positioning part provided in the first part 451 and the positioning part provided in the second part 452 may have the same or different structures. Optionally, one of the positioning part provided in the first part 451 and the positioning part provided in the second part 452 may be a positioning pin and the other may be a positioning hole.

[0128] In this embodiment of the application, positioning parts are provided in both the first part 451 and the second part 452 of the first bearing beam 45. The positioning part of one of the first part 451 and the second part 452 is used for positioning with the vehicle body, and the positioning part of the other part is used for positioning with the battery swapping device. This is beneficial to improve the positioning effect between the battery device 2 and the vehicle body, as well as the positioning effect between the battery device 2 and the battery swapping device, thereby improving the battery replacement efficiency.

[0129] In some embodiments, there are two second locking mechanisms 40, each connected to one of the two third beams 13. The positions of the multiple locking attachments of the two second locking mechanisms 40 are symmetrically arranged along the second direction Y. One second locking mechanism 40 has a first positioning part 461 and a second positioning part 462 respectively in its first part 451 and second part 452, while the other second locking mechanism 40 has a second positioning part 462 and a first positioning part 461 respectively in its first part 451 and second part 452.

[0130] Optionally, the first positioning part 461 can be a positioning pin. The second positioning part 462 can be a positioning hole.

[0131] One of the first positioning part 461 and the second positioning part 462 is used for positioning with the vehicle body, and the other is used for positioning with the battery swapping device. Thus, the two second locking mechanisms 40 can be positioned simultaneously with the vehicle body at diagonal positions, and simultaneously with the battery swapping device at diagonal positions, which helps to improve the positioning effect.

[0132] In some embodiments, along the first direction X, the minimum distance between the first locking attachment 41 and the second locking attachment 42 is d1, the minimum distance between the second locking attachment 42 and the third locking attachment 43 is d2, and the minimum distance between the third locking attachment 43 and the fourth locking attachment 44 is d3, where d2 < d1 and d2 < d3.

[0133] The minimum distance between the first locking accessory 41 and the second locking accessory 42 refers to the minimum distance between them during the state switching process. For example, the minimum distance d1 is between the first locking accessory 41 and the second locking accessory 42 when both are in the released state, or the minimum distance d1 is between the first locking accessory 41 and the second locking accessory 42 when both are in the locked state.

[0134] Similarly, the minimum distance between the second lock accessory 42 and the third lock accessory 43 refers to the minimum distance between them during the state switching process of the first lock accessory 41 and the second lock accessory 42. The minimum distance between the third lock accessory 43 and the fourth lock accessory 44 refers to the minimum distance between them during the state switching process of the third lock accessory 43 and the fourth lock accessory 44.

[0135] In this embodiment, d1 and d3 are both set to be greater than d2, which is beneficial to increase the size of the first part 451 and the second part 452 along the first direction X, thereby providing flexible position arrangement space for the positioning part and reducing the risk of interference between the positioning part or the positioning structure that cooperates with the positioning part and the lock accessory.

[0136] In some embodiments, along the first direction X, the distance between the second locking mechanism 40 and the surface of the first beam 11 away from the second beam 12 is d4, and the size of the box 10 is L2, 0.1≤d4 / L2≤0.5.

[0137] Optionally, d4 can be the distance between the end face of the first bearing beam 45 near the first beam 11 and the surface of the first beam 11 away from the second beam 12 along the first direction X.

[0138] Optionally, d4 is the dimension of the spacing space 15 along the first direction X.

[0139] Optionally, d4 / L2 ​​can be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5 or any value between two of these.

[0140] In this embodiment, setting d4 / L2 ​​to be greater than or equal to 0.1 is beneficial for increasing the size of the interval space 15 along the first direction X, reducing the risk of interference between the first load-bearing beam 45 and the vehicle body or load-bearing device during the battery swapping process. In this embodiment, setting d4 / L2 ​​to be less than or equal to 0.5 is beneficial for increasing the size of the first load-bearing beam 45 in the first direction X, thereby improving the support strength of the first load-bearing beam 45. In this embodiment, setting d4 / L2 ​​to 0.1-0.5 is beneficial for balancing the sizes of the interval space 15 and the first load-bearing beam 45 in the first direction X.

[0141] In some embodiments, the first locking mechanism 30 includes a second supporting beam 31 and a fifth locking attachment 32, wherein the second supporting beam 31 is welded to the first beam 11 and the fifth locking attachment 32 is disposed on the second supporting beam 31.

[0142] The fifth locking attachment 32 is movably disposed on the second bearing beam 31 so as to allow the fifth locking attachment 32 to switch between the locked state and the released state.

[0143] The second load-bearing beam 31 extends along the second direction Y. Optionally, the dimension of the second load-bearing beam 31 along the second direction Y is smaller than the dimension of the first load-bearing beam 45 along the first direction X.

[0144] Optionally, the number of fifth lock attachments 32 can be one.

[0145] The number of locking accessories on the second bearing beam 31 is small, the dimension of the second bearing beam 31 along the second direction Y is small, and the second bearing beam 31 is independently formed and welded to the first beam 11, which helps to save the material of the second bearing beam 31. Compared with the method of forming the second bearing beam 31 and the first beam 11 as one piece, it helps to reduce material waste.

[0146] In some embodiments, the first locking mechanism 30 includes a second supporting beam 31 and a fifth locking attachment 32. The second supporting beam 31 is connected to the first beam 11, and the fifth locking attachment 32 is disposed on the second supporting beam 31. There are at least two first locking mechanisms 30. Along the second direction Y, the sum of the dimensions of the second supporting beams 31 of all the first locking mechanisms 30 is L3, and the dimension of the housing 10 is L4, where 0.1 ≤ L3 / L4 ≤ 0.8.

[0147] The dimensions of the second load-bearing beams 31 of at least two first locking mechanisms 30 along the second direction Y can be the same or different.

[0148] The connection methods between the second load-bearing beam 31 and the first beam 11 include, but are not limited to, welding, riveting, and screw connection. The second load-bearing beam 31 and the first beam 11 can also be integrally formed.

[0149] Optionally, there are two first locking mechanisms 30, and the dimensions of the two first locking mechanisms 30 along the second direction Y are L5 and L6, respectively, where L3 = L5 + L6.

[0150] Optionally, L3 / L4 can be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8 or any value between any two of them.

[0151] In this embodiment, setting L3 / L4 to be greater than or equal to 0.1 is beneficial for improving the overall support strength of at least two first locking mechanisms 30. Setting L3 / L4 to be less than or equal to 0.8 in this embodiment is beneficial for reducing the space occupied by the first locking mechanism 30, reducing the risk of interference between the first locking mechanism 30 and the vehicle body or battery swapping device, and also saving material costs.

[0152] In some embodiments, there are two first locking mechanisms 30, which are spaced apart and symmetrically arranged along the second direction Y. This improves the support stability of the battery device 2 in the second direction Y.

[0153] In some embodiments, there are two second locking mechanisms 40, and each of the first portions 451 of the two second locking mechanisms 40 is provided with a first lifting hole 47. Each of the two first locking mechanisms 30 is provided with a second lifting hole 33. Both the first lifting hole 47 and the second lifting hole 33 are used to connect a lifting device. The first lifting holes 47 of the two first portions 451 and the second lifting holes 33 of the two first locking mechanisms 30 help to improve the stability of lifting the battery device 2.

[0154] In some embodiments, along the first direction X, the size of the housing 10 is L2, 1500mm≤L2≤2500mm. Along the second direction Y, the size of the housing 10 is L4, 800mm≤L4≤1700mm, where L4<L2.

[0155] Optionally, 1500mm≤L2≤1700mm. 1200mm≤L4≤1400mm.

[0156] Optionally, L2 can be 1500mm, 1550mm, 1600mm, 1608mm, 1608.4mm, 1610mm, 1650mm, 1700mm, 1750mm, 1800mm, 1850mm, 1900mm, 1950mm, 2000mm, 2100mm, 2200mm, 2300mm, 2400mm, 2500mm, or any value between two of these.

[0157] Optionally, L4 can be 800mm, 850mm, 900mm, 950mm, 1000mm, 1050mm, 1000mm, 1050mm, 1200mm, 1220mm, 1240mm, 1260mm, 1280mm, 1300mm, 1320mm, 1340mm, 1360mm, 1380mm, 1400mm, 1500mm, 1600mm, 1700mm, or any value between two of these.

[0158] According to a second aspect of this application, embodiments of this application also provide a vehicle 1, which includes a vehicle body 6 and a battery device 2 according to any embodiment of this application. A first locking mechanism 30 and a second locking mechanism 40 are detachably locked to the vehicle body 6.

[0159] The battery device 2 can be detachably connected to the vehicle body 6 via the first locking mechanism 30 and the second locking mechanism 40 to facilitate the replacement of the battery device 2.

[0160] Compared to the first beam 11, the second locking mechanism 40 is closer to the second beam 12. The second locking mechanism 40 is offset toward the second beam 12, which can form an interval space 15 on the side of the second locking mechanism 40 that is close to the first beam 11. During the process of replacing the battery device 2 in the vehicle 1, part of the battery swapping device can extend into the interval space 15 and dock with the vehicle body 6 of the vehicle 1, thereby accurately positioning it with the vehicle body 6. This is beneficial for locking the position of the battery device 2 to be replaced in the vehicle body 6 and improving the replacement efficiency of the battery device 2.

[0161] In some embodiments, the vehicle body 6 has a docking portion 61 for docking with a battery swapping device. The docking portion 61 and the space 15 are correspondingly arranged along the vehicle's height direction, and the height direction, the first direction X, and the second direction Y of the vehicle 1 are perpendicular to each other. During the battery swapping process, a portion of the battery swapping device can extend into the space 15 and dock with the docking portion 61, thereby achieving precise positioning with the vehicle body 6. This facilitates quickly locking the position of the battery device 2 to be replaced on the vehicle body 6, improving the battery replacement efficiency.

[0162] In some embodiments, the first direction X is parallel to the driving direction of the vehicle 1, and the first beam 11 is closer to the front of the vehicle body 6 than the second beam 12. The second direction Y is parallel to the width direction of the vehicle body 6.

[0163] In other embodiments, the first direction X is parallel to the width direction of the vehicle body 6, and the second direction Y is parallel to the driving direction of the vehicle 1. Optionally, the vehicle 1 includes a plurality of battery devices 2, which are arranged along the driving direction of the vehicle 1.

[0164] The battery device 2 provided in this embodiment includes a housing 10, a plurality of battery cells 20, a first locking mechanism 30, a second locking mechanism 40, and a first expansion beam 51. The plurality of battery cells 20 are housed within the housing 10. The housing 10 includes a first beam 11, a second beam 12, and two third beams 13. The first beam 11 and the second beam 12 are respectively located on both sides of the plurality of battery cells 20 along a first direction X, and the two third beams 13 are respectively located on both sides of the plurality of battery cells 20 along a second direction Y, the second direction Y being perpendicular to the first direction X. Each third beam 13 connects the first beam 11 and the second beam 12. Along the first direction X, the first beam 11 is closer to the plurality of battery cells 20 than the second beam 12. The first locking mechanism 30 is located on the side of the first beam 11 away from the second beam 12 and is connected to the first beam 11. The second locking mechanism 40 is located on the side of the third beam 13 away from the plurality of battery cells 20 and is connected to the third beam 13. In the first direction X, the minimum distance between the second locking mechanism 40 and the second beam 12 is less than the minimum distance between the second locking mechanism 40 and the first beam 11, and the side of the second locking mechanism 40 near the first beam 11 forms an interval space 15. The first expansion beam 51 is connected to the housing 10, and multiple battery cells 20 are disposed on the side of the first expansion beam 51 near the first beam 11. The second locking mechanism 40 includes a first supporting beam 45, and a first locking attachment 41, a second locking attachment 42, a third locking attachment 43, and a fourth locking attachment 44 arranged sequentially along the direction from the second beam 12 to the first beam 11. The first expansion beam 51 includes a first surface 511 facing the multiple battery cells 20, and at least a portion of the first locking attachment 41 extends beyond the first surface 511 along the direction from the first beam 11 to the second beam 12. Along the first direction X, the minimum distance between the first locking accessory 41 and the second locking accessory 42 is d1, the minimum distance between the second locking accessory 42 and the third locking accessory 43 is d2, and the minimum distance between the third locking accessory 43 and the fourth locking accessory 44 is d3, where d2 < d1 and d2 < d3.

[0165] Along the first direction X, the first load-bearing beam 45 has a dimension of L1, and the box body 10 has a dimension of L2, with 0.5 ≤ L1 / L2 ≤ 0.9. Along the first direction X, the distance between the second locking mechanism 40 and the surface of the first beam 11 away from the second beam 12 is d4, and the box body 10 has a dimension of L2, with 0.1 ≤ d4 / L2 ​​≤ 0.5.

[0166] The first locking mechanism 30 includes a second supporting beam 31 and a fifth locking accessory 32. The second supporting beam 31 is connected to the first beam 11, and the fifth locking accessory 32 is disposed on the second supporting beam 31. There are at least two first locking mechanisms 30. Along the second direction Y, the sum of the dimensions of the second supporting beams 31 of all the first locking mechanisms 30 is L3, and the dimension of the box body 10 is L4, where 0.1≤L3 / L4≤0.8.

[0167] 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: Multiple battery cells; A housing, in which the plurality of battery cells are housed, the housing includes a first beam, a second beam and two third beams, the first beam and the second beam being respectively disposed on both sides of the plurality of battery cells along a first direction, the two third beams being respectively disposed on both sides of the plurality of battery cells along a second direction, the second direction being perpendicular to the first direction, each of the third beams connecting the first beam and the second beam, along the first direction, the first beam being closer to the plurality of battery cells than the second beam; A first locking mechanism is located on the side of the first beam away from the second beam and is connected to the first beam; and The second locking mechanism is located on the side of the third beam away from the plurality of battery cells and is connected to the third beam. In the first direction, the minimum distance between the second locking mechanism and the second beam is less than the minimum distance between the second locking mechanism and the first beam. The side of the second locking mechanism closer to the first beam forms an interval space.

2. The battery device according to claim 1, characterized in that, The box body is defined by a first accommodating space and a second accommodating space arranged along the first direction; The battery device includes a first expansion beam connected to the housing and located between the first accommodating space and the second accommodating space. The first accommodating space is located on the side of the first expansion beam closest to the first beam, and the plurality of battery cells are accommodated in the first accommodating space.

3. The battery device according to claim 2, characterized in that, The second locking mechanism includes a plurality of locking attachments arranged along the first direction, wherein the locking attachment closest to the second beam among the plurality of locking attachments is the first locking attachment; The first expansion beam includes a first surface facing the first receiving space, a direction along the first beam pointing towards the second beam and parallel to the first direction, and at least a portion of the first locking attachment extends beyond the first surface.

4. The battery device according to claim 3, characterized in that, In the same projection plane perpendicular to the second direction, the orthographic projection of the first lock attachment at least partially coincides with the orthographic projection of the first expansion beam.

5. The battery device according to any one of claims 1-4, characterized in that, The second locking mechanism includes a first supporting beam and a plurality of locking attachments. The first supporting beam is connected to the third beam and extends along the first direction. The plurality of locking attachments are disposed on the first supporting beam and are spaced apart along the first direction.

6. The battery device according to claim 5, characterized in that, The first load-bearing beam and the third beam are integrally formed.

7. The battery device according to claim 5 or 6, characterized in that, Along the first direction, the size of the first load-bearing beam is L1, and the size of the box body is L2, where 0.5 ≤ L1 / L2 ≤ 0.

9.

8. The battery device according to any one of claims 5-7, characterized in that, The plurality of lock accessories include a first lock accessory, a second lock accessory, a third lock accessory, and a fourth lock accessory, arranged sequentially along the direction from the second beam to the first beam; The first load-bearing beam includes a first part and a second part. The first part is located between the first locking accessory and the second locking accessory, and the second part is located between the third locking accessory and the fourth locking accessory. Both the first part and the second part are provided with positioning parts.

9. The battery device according to claim 8, characterized in that, There are two second locking mechanisms, which are respectively connected to the two third beams. The positions of the plurality of locking attachments of the two second locking mechanisms are symmetrically arranged along the second direction. One second locking mechanism has a first positioning part and a second positioning part respectively in its first and second parts, and another second locking mechanism has a second positioning part and a first positioning part respectively in its first and second parts.

10. The battery device according to claim 8 or 9, characterized in that, Along the first direction, the minimum distance between the first lock accessory and the second lock accessory is d1, the minimum distance between the second lock accessory and the third lock accessory is d2, and the minimum distance between the third lock accessory and the fourth lock accessory is d3, where d2 < d1 and d2 < d3.

11. The battery device according to any one of claims 1-10, characterized in that, Along the first direction, the distance between the second locking mechanism and the surface of the first beam away from the second beam is d4, and the size of the box is L2, 0.1≤d4 / L2≤0.

5.

12. The battery device according to any one of claims 1-11, characterized in that, The first locking mechanism includes a second supporting beam and a fifth locking accessory. The second supporting beam is welded to the first beam, and the fifth locking accessory is disposed on the second supporting beam.

13. The battery device according to any one of claims 1-12, characterized in that, The first locking mechanism includes a second supporting beam and a fifth locking accessory, wherein the second supporting beam is connected to the first beam and the fifth locking accessory is disposed on the second supporting beam; The first locking mechanism consists of at least two parts. Along the second direction, the sum of the dimensions of the second load-bearing beams of all the first locking mechanisms is L3, and the dimension of the box body is L4, where 0.1 ≤ L3 / L4 ≤ 0.

8.

14. The battery device according to any one of claims 1-13, characterized in that, There are two first locking mechanisms, which are spaced apart and symmetrically arranged along the second direction.

15. The battery device according to any one of claims 1-14, characterized in that, Along the first direction, the dimensions of the box are L2, 1500mm≤L2≤2500mm; Along the second direction, the dimensions of the box are L4, 800mm≤L4≤1700mm; Where L4 < L2.

16. A vehicle, characterized in that, Includes a vehicle body and a battery device according to any one of claims 1-15, wherein the first locking mechanism and the second locking mechanism are detachably locked to the vehicle body.

17. The vehicle according to claim 16, characterized in that, The vehicle body has a docking section for docking with a battery swapping device; Along the height direction of the vehicle, the docking portion and the interval space are respectively arranged, and the height direction, the first direction and the second direction are perpendicular to each other.

18. The vehicle according to claim 16 or 17, characterized in that, The first direction is parallel to the vehicle's direction of travel, and the first beam is closer to the front of the vehicle body than the second beam.

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