Battery device and electric device

Abstract

The invention is applicable to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a box body structure and a first battery module, and the first battery module comprises a first electric connection structure and a plurality of battery monomer assemblies arranged at intervals in the first direction; the battery monomer assembly is provided with a first end part and a second end part which are oppositely arranged along a second direction, the first electric connection structure comprises a first electric connection piece, and the first electric connection piece comprises two first electric connection parts and a second electric connection part electrically connected between the two first electric connection parts; the two first electric connection parts are electrically connected to the two adjacent battery monomer assemblies respectively, the first electric connection parts are arranged at the first end parts, the second electric connection parts are bent towards the second end parts relative to the first electric connection parts, and the second electric connection parts are bent to form accommodating spaces. Therefore, the first electric connection structure can well avoid the cross beam or the longitudinal beam, so that the cross beam or the longitudinal beam can be conveniently accommodated between two adjacent battery monomer assemblies.

Description

Technical Field

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

[0002] From a market perspective, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of battery devices continue to expand, the market demand is also constantly increasing. Furthermore, the capacity of battery devices is becoming larger, and the performance requirements for battery devices are becoming increasingly stringent.

[0003] In related technologies, battery devices typically include multiple spaced-apart battery cell assemblies, each comprising multiple battery cells, with adjacent battery cell assemblies being electrically connected via an electrical connection structure.

[0004] In some cases, the space between two adjacent battery cells is used to accommodate the vehicle's crossbeams or longitudinal beams. However, the arrangement of electrical connections inevitably interferes with the layout of the vehicle's crossbeams or longitudinal beams.

[0005] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0006] In view of the above problems, embodiments of this application provide a battery device and an electrical device that can improve the technical problem that the arrangement of the battery device in a vehicle is easily interfered with.

[0007] In a first aspect, embodiments of this application provide a battery device, including: Box structure; A first battery module is disposed within a housing structure. The first battery module includes a first electrical connection structure and a plurality of battery cell assemblies spaced apart along a first direction. Each battery cell assembly has a first end and a second end disposed opposite to each other along a second direction. The first electrical connection structure includes a first electrical connector, which includes two first electrical connection portions and a second electrical connection portion electrically connected between the two first electrical connection portions. The first electrical connection portions are disposed on the first end, and the second electrical connection portions are bent relative to the first electrical connection portions toward the second end, forming at least a partially located accommodating space between two adjacent battery cell assemblies. The accommodating space is used to accommodate a component to be accommodated. Each battery cell assembly includes a plurality of battery cells, and the two first electrical connection portions of the first electrical connector are respectively electrically connected to the battery cells of two adjacent battery cell assemblies. The first direction and the second direction intersect.

[0008] The battery device provided in this application embodiment comprises a first battery module with multiple battery cell assemblies spaced apart along a first direction. A first electrical connection portion of a first electrical connector is disposed at a first end of a battery cell assembly along a second direction. A second electrical connection portion is bent relative to the first electrical connection portion toward a second end of the battery cell assembly, and the bending of the second electrical connection portion forms at least a partially accommodated space between two adjacent battery cell assemblies. This allows the first and second electrical connection portions to be bent at an angle formed between one end of a battery cell assembly along the second direction and the side of the battery cell assembly along the first direction toward an adjacent battery cell assembly. At least a portion of the accommodated space formed by the bending of the second electrical connection portion is accommodated between two adjacent battery cell assemblies, and the orthographic projection of the second electrical connection portion perpendicular to a third direction can be approximately "U"-shaped. In this way, a crossbeam or longitudinal beam can be inserted into the accommodated space, and the first electrical connector can better avoid the crossbeam or longitudinal beam, improving the problem of interference between the crossbeam or longitudinal beam arrangement and the first electrical connection structure. This facilitates the accommodation of the vehicle's crossbeams or longitudinal beams within the space formed between two adjacent battery cell assemblies, thereby improving the arrangement and adaptation of the battery device in the vehicle.

[0009] In some embodiments, a battery cell includes a housing, an electrode assembly, and an electrode terminal. The electrode assembly is disposed within the housing, and the electrode terminal is disposed at one end of the housing along a second direction and is electrically connected to the electrode assembly. The first electrical connector is integrally formed, and the first electrical connector extends to the electrode terminal.

[0010] With this configuration, the first electrical connection portion can essentially not extend between two adjacent battery cell components along the first direction. This can further improve the space utilization rate of the accommodating space between two adjacent battery cell components in the first direction. That is, it allows the accommodating space to occupy a larger space between two adjacent battery cell components in the first direction, thereby further facilitating the accommodating of the vehicle's crossbeams or longitudinal beams within the space between two adjacent battery cell components.

[0011] In some embodiments, the first electrical connection structure further includes a second electrical connector, which is electrically connected between the electrode terminal and the first electrical connection portion.

[0012] This allows the first electrical connection structure to be a composite structure. On one hand, it facilitates the use of the same material for the second electrical connector and the electrode terminals, enabling electrical connection between them. On the other hand, it allows the first electrical connector to be made of copper, improving the conductivity of the first electrical connection structure and enhancing its vibration resistance.

[0013] In some embodiments, the second electrical connection has a rib on at least one side.

[0014] The presence of ribs on the second electrical connection improves its structural strength. This helps reduce the shear force on the second electrical connection, lowers the risk of breakage, and enhances the reliability of the electrical connection between adjacent battery cells.

[0015] In some embodiments, a buffer is provided on at least one side of the second electrical connection portion.

[0016] This allows for the mitigation of assembly tolerances in the first electrical connection structure within the battery pack. On one hand, it improves the assembly stability of the first electrical connection structure within the battery pack. On the other hand, it reduces the risk of breakage of the first electrical connection structure and improves the reliability of the electrical connection between two adjacent battery cells.

[0017] In some embodiments, the second electrical connection portion includes a first bent section and two second bent sections. The two second bent sections are electrically connected to opposite ends of the first bent section and between the two first electrical connections. One end of the second bent section is bent relative to the first bent section, and the other end of the second bent section is bent relative to the first electrical connection portion. The first bent section and the second bent section enclose a receiving space.

[0018] By adopting the above technical solution, the second electrical connection part can effectively avoid the vehicle's crossbeams or longitudinal beams, thereby enabling the first electrical connection part to better avoid the crossbeams or longitudinal beams, improving the problem of interference from the first electrical connection structure on the arrangement of the crossbeams or longitudinal beams.

[0019] In some embodiments, the first bent segment has a rib on at least one side along the second direction; and / or, the second bent segment has a rib on at least one side along the first direction.

[0020] By adopting the above technical solution, at least one of the first bending section and the second bending section of the second electrical connection part has a rib, which helps to increase the rib and further improve the structural strength of the second electrical connection part.

[0021] In some embodiments, a buffer is provided on at least one side of the first bent section along the second direction; and / or, a buffer is provided on at least one side of the second bent section along the first direction.

[0022] By adopting the above technical solution, at least one of the first bending section and the second bending section of the second electrical connection is provided with a buffer. This helps the second electrical connection to be buffered in the first direction and the second direction respectively by the buffer, which helps to further improve the assembly stability of the first electrical connection structure in the battery device and further reduce the risk of breakage of the first electrical connection structure.

[0023] In some embodiments, the two first electrical connection portions of the first electrical connector are spaced apart along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; Wherein, in the first electrical connector, the first bent segment is inclined relative to the first direction and the third direction; and / or, in the first electrical connector, the second bent segment is inclined relative to the second direction and the third direction.

[0024] By having the two first electrical connection portions of the first electrical connector spaced apart along a third direction, it is convenient to set the electrical connection method of the battery cell rows in two adjacent battery cell assemblies along the first direction to be the same. Specifically, it is convenient to set the structure of the busbar on two adjacent battery cell assemblies to be the same, so that the busbar of two adjacent battery cell assemblies can be shared. This helps to reduce the types of components in the battery device and facilitates the manufacturing of the battery device. By having at least one of the first and second bends in the second electrical connection inclined, on the one hand, the two first electrical connection portions of the first electrical connector are spaced apart along a third direction. On the other hand, it helps to increase the vibration resistance of the first electrical connector.

[0025] In some embodiments, a battery cell assembly includes multiple rows of battery cells distributed along a third direction, and each row of battery cells includes multiple battery cells distributed along a first direction; in two adjacent battery cell assemblies, the multiple rows of battery cells are arranged facing each other along the first direction, and the number of battery cells and the electrical connection method of any two rows of battery cells arranged facing each other along the first direction are the same; wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0026] By ensuring that the electrical connections of any two battery cell rows facing each other along the first direction are identical, the structure of the busbar components on any two battery cell rows facing each other along the first direction is also identical. This allows adjacent battery cell assemblies to share busbar components, which helps reduce the types of components in the battery device and facilitates its manufacturing.

[0027] In some embodiments, the first battery module has an electrode output terminal, and the battery cell assembly further includes a third electrical connector. In the battery cell assembly, the third electrical connector is electrically connected to the battery cells of two battery cell rows distributed along a third direction, so as to electrically connect the multiple battery cell rows. The battery cells of two adjacent battery cell assemblies are arranged in the same way, and the two adjacent battery cell assemblies are respectively the first battery cell assembly and the second battery cell assembly. In the second battery cell assembly, the battery cell that is electrically connected to the first battery cell assembly via the first electrical connector is the first battery cell. In the first battery cell assembly, the battery cell corresponding to the position of the first battery cell is electrically connected to the third electrical connector; or, the first battery cell assembly has an electrode output terminal, and the battery cell corresponding to the position of the first battery cell is electrically connected to the electrode output terminal.

[0028] By adopting the above technical solution, in the process of arranging the first electrical connection structure to electrically connect multiple battery cell modules, there is no need to change the electrical connection method in each battery cell row, that is, there is no need to change the busbar component, so that the structure of the busbar component of two adjacent battery cell modules can be set to be the same, so that the busbar component of two adjacent battery cell modules can be shared. This helps to reduce the types of components in the battery device and facilitates the processing of the battery device.

[0029] In some embodiments, the battery cell assembly includes a third electrical connector and a plurality of battery cell rows distributed along a third direction. The battery cell rows include a plurality of battery cells distributed along a first direction. The third electrical connector includes two third electrical connection portions and a fourth electrical connection portion electrically connected between the two third electrical connection portions. The two third electrical connection portions of the third electrical connector are respectively electrically connected to the battery cells of the two battery cell rows to electrically connect the plurality of battery cell rows. The third electrical connection portions are disposed at a position at a first end of the battery cell row, and the fourth electrical connection portion is bent toward a second end relative to the third electrical connection portions and disposed on one side of the battery cell row along the first direction. The first direction, the second direction, and the third direction are mutually perpendicular to each other.

[0030] The fourth electrical connection is bent relative to the third electrical connection at the other end of the battery cell array along the second direction, and is located on one side of the battery cell array along the first direction, allowing the fourth electrical connection to fit well against the surface of the battery cell assembly along the first direction. This prevents the third electrical connection from extending beyond the space between adjacent battery cell assemblies along the first direction. This improves the space utilization rate of the accommodating space between adjacent battery cell assemblies in the first direction, allowing the accommodating space to occupy a larger portion of the space between adjacent battery cell assemblies. This allows the first electrical connection to better avoid interference from the crossbeams or longitudinal beams, mitigating the problem of interference with the arrangement of crossbeams or longitudinal beams by the first electrical connection structure. It also facilitates the accommodating of the vehicle's crossbeams or longitudinal beams within the space formed by the gap between adjacent battery cell assemblies, thereby improving the arrangement and fit of the battery device in the vehicle.

[0031] In some embodiments, two battery cells electrically connected to the first electrical connector are arranged facing each other along a first direction.

[0032] This design ensures that the distance between the two first electrical connection portions of the first electrical connector along the third direction is not too large, thus preventing the overall extension length of the first electrical connection structure along the third direction from being excessive. This mitigates the cracking problem of the first electrical connection structure and, to a certain extent, guarantees the fixation of the first electrical connection structure within the battery device and the reliability of the electrical connection between adjacent battery cells.

[0033] In some embodiments, a battery cell has two electrode terminals, the two electrode terminals of the battery cell are spaced apart along a third direction, and two first electrical connection portions of the first electrical connector are spaced apart along a third direction. Among them, the first direction, the second direction, and the third direction are all perpendicular to each other.

[0034] This configuration ensures that the battery cells in the battery cell rows of two battery cell assemblies facing each other along the first direction have the same electrical connection method. In this way, the structure of the busbar of two adjacent battery cell assemblies can be set to be the same, so that the busbar of two adjacent battery cell assemblies can be shared. This helps to reduce the types of components in the battery device and facilitates the manufacturing of the battery device.

[0035] In some embodiments, the battery cell assembly further includes two limiting beams spaced apart along a first direction. In the battery cell assembly, the battery cell is limited between the two limiting beams along the first direction, and a portion of the second electrical connection extends along the limiting beams away from the surface of the battery cell.

[0036] This configuration allows the second electrical connection portion to be positioned as close as possible to the surface of the limiting beam away from the battery cell along the first direction. Specifically, the second bent section of the second electrical connection portion can be positioned as close as possible to the surface of the limiting beam away from the battery cell along the first direction to reduce the space between the first electrical connection portion and the second bent section extending along the first direction between two adjacent battery cell assemblies. This further improves the space utilization rate of the accommodating space between two adjacent battery cell assemblies in the first direction. That is, it allows the accommodating space to occupy a larger space between two adjacent battery cell assemblies in the first direction, thereby enabling the first electrical connection to better avoid the crossbeam or longitudinal beam, improving the problem of interference between the crossbeam or longitudinal beam arrangement and the first electrical connection structure. This facilitates the accommodating of the vehicle's crossbeams or longitudinal beams within the space formed by the gap between two adjacent battery cell assemblies, thereby improving the arrangement and adaptation of the battery device on the vehicle.

[0037] In some embodiments, a first groove is provided at one end of the limiting beam along the second direction, the first groove passes through the limiting beam along the first direction, and a first electrical connection portion passes through the first groove along the first direction.

[0038] This design serves two purposes. First, it allows the limiting beam to avoid interference with the first electrical connection portion via the first groove, mitigating the problem of interference between the limiting beam and the first electrical connection portion that could lead to an increase in the size of the battery cell assembly along the second direction. Second, the first groove can position the first electrical connection structure, facilitating its assembly within the battery device.

[0039] In some embodiments, the first electrical connection structure further includes an insulating layer disposed on the outer surface of the second electrical connection portion.

[0040] This configuration provides insulation protection for the first electrical connector, mitigates the problem of short circuits in the first electrical connector, and improves the reliability of the battery device.

[0041] In some embodiments, a portion of the outer surface of the first electrical connection portion is provided with an insulating layer.

[0042] This configuration further enhances the insulation protection of the first electrical connector, mitigates the problem of short circuits in the first electrical connector, and improves the reliability of the battery device.

[0043] In some embodiments, the housing structure includes a first part and a second part arranged along a second direction, and a first battery module is disposed within the space formed by the first part and the second part; the second part is provided with a plurality of second grooves spaced apart along the first direction and a protrusion disposed between two adjacent second grooves on the side facing the first part, at least a portion of a plurality of battery cell assemblies of the first battery module is respectively disposed in the plurality of second grooves, the protrusion is inserted into the receiving space, and a third groove is provided on the side of the second part away from the first part at the position corresponding to the protrusion.

[0044] By adopting the above technical solution, the second part of the housing structure is continuously recessed and convex on both sides along the first direction, so that the second part can adaptably accommodate multiple spaced battery cell components and the first electrical connection structure of the first battery module. Furthermore, the vehicle's crossbeams or longitudinal beams can be accommodated within the third groove, thus facilitating the assembly of the battery device on the vehicle.

[0045] In some embodiments, the battery device further includes a second battery module, which includes a plurality of battery cells. The second battery module is disposed within a housing structure and is located on the side of the first battery module away from the second portion along a second direction.

[0046] This configuration results in a multi-layer battery structure with the battery device stacked along the second direction.

[0047] Secondly, embodiments of this application provide an electrical device, including a battery device.

[0048] The electrical device provided in this application embodiment, by employing the battery device mentioned above, facilitates the housing of the vehicle's crossbeams or longitudinal beams within the space formed between two adjacent battery cell modules, thereby improving the assembly convenience of the electrical device.

[0049] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application; Figure 2 This application provides perspective structural diagrams of battery devices according to some embodiments. Figure 3 for Figure 2 Partial three-dimensional structural diagram; Figure 4 A perspective structural diagram of a battery cell for a battery device provided in some embodiments of this application; Figure 5 for Figure 3 Enlarged view of point A in the middle; Figure 6 A perspective view of the first electrical connection structure of a battery device provided in some embodiments of this application; Figure 7 for Figure 3 A top view of the first battery module and the first electrical connection structure of the provided battery device; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 for Figure 8 Partial diagram Figure 10 for Figure 3 A magnified view of point C in the middle.

[0052] The following are the labeling elements in the figure: 1000 - Vehicle; 100 - Battery unit; 200 - Controller; 300 - Motor; 10 - Battery cell assembly; 101 - First recess; 102 - Accommodation space; 10a - First battery cell assembly; 10b - Second battery cell assembly; 11 - Battery cell array; 111 - Battery cell; 111a - First battery cell; 1111 - Housing; 1112 - Electrode terminal; 12 - Third electrical connector; 121 - Third electrical connection; 122 - Fourth electrical connection; 13 - Limiting beam; 20 - First electrical connection Structure; 21-First electrical connector; 211-First electrical connection part; 212-Second electrical connection part; 2121-First bending section; 2122-Second bending section; 2123-Protruding rib; 22-Buffer; 23-Insulating layer; 30-Box structure; 301-Third groove; 31-First part; 32-Second part; 40-Second electrical connection structure; M-First battery module; N-Second battery module; O-Electrode output end; a-First end; b-Second end; Y-First direction; Z-Second direction; X-Third direction. Detailed Implementation

[0053] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0054] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0055] Unless otherwise specified, all technical features and optional technical features of the embodiments of this application can be combined with each other to form new technical solutions.

[0056] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

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

[0058] In the description of the embodiments of this application, the technical terms "first," "second," etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0059] In the description of the embodiments of this application, "multiple" means two or more, and unless otherwise explicitly specified, "two or more" includes two. Correspondingly, "multiple groups" means two or more groups, including two groups.

[0060] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the 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 this application can be understood according to the specific circumstances.

[0061] In the description of this application, the technical 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 three possibilities: A exists, A and B exist simultaneously, and B exists. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "proximity" and "adjacent" refer to proximity in location. For example, among three components A1, A2, and B, if the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, meaning A2 is adjacent to B. Alternatively, B can be said to be adjacent to A2; in other words, A2 is adjacent to B. Similarly, when there are multiple components C, namely C1, C2, ... CN, if one component C, such as C2, is closer to component B than the other components C, then B is adjacent to C2; in other words, C2 is adjacent to B.

[0063] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0064] From a market perspective, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of battery devices continue to expand, the market demand is also constantly increasing. Furthermore, the capacity of battery devices is becoming larger, and the performance requirements for battery devices are becoming increasingly stringent.

[0065] In related technologies, battery devices typically include multiple spaced-apart battery cell assemblies, each comprising multiple battery cells, with adjacent battery cell assemblies being electrically connected via an electrical connection structure.

[0066] In some cases, the space created between two adjacent battery cells needs to accommodate the vehicle's crossbeams or longitudinal beams. However, the arrangement of electrical connections inevitably interferes with the layout of these beams, making the battery installation difficult and prone to interference.

[0067] For example, in the spacing direction of multiple battery cells, the electrical connection structure inevitably occupies the space between adjacent battery cells, causing interference to the arrangement of the vehicle's crossbeams or longitudinal beams within this space. Specifically, when the positions of the multiple battery cells are predetermined, if the electrical connection structure occupies a significant portion of the space between adjacent battery cells in the spacing direction, it will be difficult to accommodate the vehicle's crossbeams or longitudinal beams within that space. Even if the vehicle's crossbeams or longitudinal beams can be accommodated within the space between adjacent battery cells, if the electrical connection structure occupies this space in the spacing direction, the space between the two battery cells needs to be increased, resulting in an increase in the overall size of the battery pack.

[0068] Based on the above considerations, this application provides a battery device and an electrical device. A first battery module comprises multiple battery cell assemblies spaced apart along a first direction. A first electrical connection portion of a first electrical connector is disposed at a first end of a battery cell assembly along a second direction. A second electrical connection portion is bent relative to the first electrical connection portion toward a second end of the battery cell assembly. The bending of the second electrical connection portion forms at least a partially accommodating space between two adjacent battery cell assemblies. This allows the first and second electrical connection portions to be bent at an angle formed between one end of a battery cell assembly along the second direction and the side of the battery cell assembly along the first direction toward an adjacent battery cell assembly. At least a portion of the accommodating space formed by the bending of the second electrical connection portion is accommodated between two adjacent battery cell assemblies, and the orthographic projection of the second electrical connection portion perpendicular to a third direction can be approximately "U"-shaped. In this way, the crossbeam or longitudinal beam can be inserted into the receiving space, and the first electrical connector can better avoid the crossbeam or longitudinal beam, improving the problem of the crossbeam or longitudinal beam arrangement being interfered with by the first electrical connection structure. This makes it easier for the vehicle's crossbeam or longitudinal beam to be received in the space formed by the gap between two adjacent battery cell modules, thereby improving the arrangement and adaptation of the battery device on the vehicle.

[0069] The battery apparatus mentioned in the embodiments of this application may include multiple battery cells for providing voltage and capacity. These multiple battery cells are electrically connected, specifically, they may be connected in series, in parallel, or in a mixed connection. A mixed connection means that some of the battery cells are connected in series and others in parallel.

[0070] In some embodiments, the battery device may be a battery module.

[0071] In some embodiments, the battery device may be a battery pack, which includes a housing structure and a plurality of individual battery cells housed within the housing structure.

[0072] As an example, multiple battery cells are directly housed within the casing structure.

[0073] As an example, multiple battery cells are fixed together to form at least one battery module, which is then housed in a housing structure.

[0074] In some embodiments, the housing structure may include a first part and a second part. The first part and the second part are fastened together to form a closed space inside the housing structure for housing the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0075] As an example, the enclosure structure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, forming an enclosed space inside the enclosure structure to house the individual battery cells. The second part can be either the top cover or the bottom plate.

[0076] The battery module is an independent module formed by arranging and fixing multiple battery cells. For example, the battery module can be formed by binding multiple battery cells together with cable ties. For example, at least one of the two ends and the two sides of the battery module can be provided with a limiting plate or a limiting beam, wherein the limiting plate can be an end plate structure or a side plate structure.

[0077] A battery cell is the smallest unit used to store and output electrical energy. A battery cell can be either a rechargeable battery or a primary battery. A rechargeable battery is a battery cell that can be recharged after being discharged, allowing the active materials to be reactivated and reused.

[0078] Among them, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0079] Among them, the battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0080] The battery device provided in this application embodiment can also be used in electrical devices that use a battery device as a power source.

[0081] Electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. Based on the power source, vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Based on the drive method, vehicles can be front-wheel drive vehicles, rear-wheel drive vehicles, or four-wheel drive vehicles.

[0082] For ease of description, this application uses a vehicle as an example to illustrate the embodiments of the electrical device.

[0083] In some embodiments, please refer to Figure 1 , Figure 1 This is a schematic diagram of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0084] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0085] In some embodiments, please refer to the following: Figure 2 and Figure 3 , Figure 2 This is a perspective structural view of the battery device 100 provided in some embodiments of this application. Figure 3 for Figure 2 The diagram shows a partial three-dimensional structure. The battery device 100 may include a housing structure 30 and individual battery cells 111. The housing structure 30 has an internal space for accommodating the individual battery cells 111.

[0086] The enclosure structure 30 can adopt various structures. In some embodiments, the enclosure structure 30 may include a first part 31 and a second part 32, which overlap each other and together define the internal space of the enclosure structure 30, which is a closed space. Here, "closed" means covered or shut off; it can be sealed or unsealed. That is, the enclosure structure 30 can be a sealed structure or an unsealed structure. For example, Figure 3 As shown, both the first part 31 and the second part 32 can be hollow structures with an opening at one end. The open side of the first part 31 covers the open side of the second part 32, so that the first part 31 and the second part 32 together define the internal space of the box structure 30. Alternatively, the first part 31 can be a hollow structure with an opening at one end, and the second part 32 is a plate-like structure. The second part 32 covers the open side of the first part 31, so that the first part 31 and the second part 32 together define the internal space of the box structure 30. The box structure 30 composed of the first part 31 and the second part 32 can be of various shapes, such as a cylinder, a cuboid, etc.

[0087] In some embodiments, please combine Figure 1 and Figure 2 The housing structure 30 of the battery unit 100 can be part of the chassis structure of the vehicle 1000. For example, a portion of the housing structure 30 can be at least a portion of the floor of the vehicle 1000, or a portion of the housing structure 30 can be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0088] In some embodiments, please refer to Figure 4 ,in, Figure 4 This is a perspective structural diagram of a battery cell 111 provided in some embodiments of this application. The battery cell 111 provided in the embodiments of this application may include an electrode assembly and a housing 1111.

[0089] The electrode assembly is the component in the battery cell 111 where electrochemical reactions occur. The electrode assembly includes multiple electrodes, including a positive electrode and a negative electrode. During the charging and discharging process of the battery cell 111, active ions (such as lithium ions) move back and forth between the positive and negative electrode, inserting and removing themselves.

[0090] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0091] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0092] In some implementations, the electrode assembly is a stacked structure.

[0093] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0094] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0095] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0096] In some embodiments, the electrode assembly may further include a separator disposed between the negative electrode and the positive electrode. The separator, disposed between the positive and negative electrodes, serves to prevent short circuits between the two electrodes while allowing active ions to pass through.

[0097] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0098] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0099] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal, etc.

[0100] In some embodiments, the electrode assembly includes tabs that can conduct current from the electrode assembly. There are multiple tabs, including positive and negative tabs.

[0101] Specifically, the electrode assembly includes a main body and electrode tabs. The positive and negative electrode tabs may be located together at one end of the main body; alternatively, the positive and negative electrode tabs may be located at opposite ends of the main body.

[0102] The electrode may include an electrode body and a tab. The electrode bodies of multiple electrodes can constitute the main body of an electrode assembly, and the tabs of multiple electrodes can constitute a tab. Specifically, the tab of the positive electrode can constitute a positive tab, and the tab of the negative electrode can constitute a negative tab.

[0103] When the electrode assembly has a wound structure, the main body also has a wound structure. When the electrode assembly has a laminated structure, the main body also has a laminated structure. When the electrode assembly has a hybrid structure of wound and laminated components, the main body also has a hybrid structure of wound and laminated components.

[0104] The electrode body includes a current collector. In the electrode, the electrode body and the electrode tab can be integrally formed; or, in the electrode, the electrode body and the electrode tab can be separately connected and fixed by welding, bonding or other methods.

[0105] In some embodiments, the electrode body may further include an active material. Specifically, the active material is disposed on the current collector. In this embodiment, at least a portion of the electrode body has the active material, while at least a portion of the tab does not have the active material.

[0106] As an example, the portions of the positive and negative electrodes containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrodes without active material each constitute a tab. In other words, the portion of the positive electrode containing active material is the main body of the positive electrode, the portion of the negative electrode containing active material is the main body of the negative electrode, the portion of the positive electrode without active material is the tab of the positive electrode, and the portion of the negative electrode without active material is the tab of the negative electrode. That is, the main body of the electrode is completely covered with active material, and the tabs do not contain active material.

[0107] In the battery cell 111, the number of electrode components can be one or more.

[0108] In some embodiments, the battery cell 111 may further include an electrolyte, which acts as a conductor of ions between the positive and negative electrode plates. The electrolyte described in this application embodiment may be liquid, gel-like, or solid.

[0109] The housing 1111 is used to define the internal environment of the battery cell 111 and to house the electrode assembly and electrolyte.

[0110] The outer casing 1111 can be either a sealed or unsealed structure. As an example, when the outer casing 1111 is a sealed structure, it protects the electrode assembly and, to some extent, prevents leakage such as electrolyte leakage. As an example, when the outer casing 1111 is an unsealed structure, it still protects the electrode assembly. A sealing bag may also be included between the outer casing 1111 and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating structure, an aluminum-plastic film, etc.

[0111] The outer shell 1111 can be a steel shell, aluminum shell, plastic shell (such as polypropylene), composite metal shell (such as copper-aluminum composite shell), or aluminum-plastic film, etc.

[0112] In some embodiments, please refer to Figure 4 The battery cell 111 may also include electrode terminals 1112. Electrode terminals 1112 are components with conductive properties, serving as current transmission terminals for the battery cell 111. Electrode terminals 1112 may be, but are not limited to, terminals.

[0113] Electrode terminal 1112 is electrically connected to the electrode assembly. Specifically, electrode terminal 1112 is electrically connected to the tab of the electrode assembly. The electrode terminal 1112 can be directly electrically connected to the tab by welding, bonding, or other methods. Alternatively, a transition structure can be provided between the electrode terminal 1112 and the tab to facilitate current flow, thereby indirectly achieving an electrical connection between the electrode terminal 1112 and the tab.

[0114] The adapter structure refers to a conductive metal structure, such as, but not limited to, a copper busbar. Electrical connections can be made between the adapter structure and the electrode tab, and between the adapter structure and the electrode terminal 1112, through welding, bonding, or other methods.

[0115] In some embodiments, please refer to Figure 4 The electrode terminals 1112 are configured in multiple ways, including positive electrode terminals and negative electrode terminals. For example, there are two electrode terminals 1112, which are respectively a positive electrode terminal and a negative electrode terminal. Both the positive electrode terminal and the negative electrode terminal are electrically connected to the electrode assembly. Specifically, the positive electrode terminal is electrically connected to the positive electrode tab, and the negative electrode terminal is electrically connected to the negative electrode tab.

[0116] In some embodiments, please refer to Figure 4 The positive electrode terminal and the negative electrode terminal can be located at the same end of the housing 1111. Alternatively, the positive electrode terminal and the negative electrode terminal can be located at opposite ends of the housing 1111.

[0117] Please refer to the following: Figures 2 to 7 ,in, Figure 5 for Figure 3 Enlarged view of point A in the middle. Figure 6 This is a perspective view of the first electrical connection structure 20 of the battery device 100 provided in some embodiments of this application. Figure 7 for Figure 3A top view of the first battery module M and the first electrical connection structure 20 of the provided battery device 100. The battery device 100 provided in this embodiment includes a housing structure 30 and a first battery module M, which is disposed within the housing structure 30. The first battery module M includes the first electrical connection structure 20 and a plurality of battery cell assemblies 10, which are spaced apart along a first direction Y. Each battery cell assembly 10 includes a plurality of battery cells 111. Each battery cell assembly 10 has a first end a and a second end b disposed opposite each other along a second direction Z. The first electrical connection structure 20 includes a first electrical connector 21, which includes a second electrical connection portion 212 and two first electrical connection portions 211, with the second electrical connection portion 212 electrically connected between the two first electrical connection portions 211. A first electrical connection portion 211 is disposed on the first end a of the battery cell assembly 10. A second electrical connection portion 212 is bent relative to the first electrical connection portion 211 toward the second end b of the battery cell assembly 10, and the bent second electrical connection portion 212 forms a receiving space 102. At least a portion of the receiving space 102 is disposed between two adjacent battery cell assemblies 10. The two first electrical connection portions 211 of the first electrical connector 21 are respectively electrically connected to the battery cells 111 of two adjacent battery cell assemblies 10. The first direction Y and the second direction Z intersect.

[0118] Understandably, the battery device 100 includes at least one battery module, which is a first battery module M. When the number of battery modules is one, that battery module is the first battery module M. When the number of battery modules is multiple, one of the battery modules is the first battery module M, or multiple battery modules are all first battery modules M. When the number of battery modules is multiple, some of the battery modules are first battery modules M, and another portion of the battery modules can be second battery modules N (described below), or all the battery modules are first battery modules M. That is, the number of first battery modules M can be one or more. When the number of first battery modules M is multiple, the multiple first battery modules M can be stacked along the second direction Z, or they can be stacked along the third direction X (described below).

[0119] As an example, such as Figure 3 As shown, there are multiple battery modules, which are stacked along the second direction Z. The battery device 100 is a multi-layer battery structure stacked along the second direction Z. At least one layer of the battery structure in the second direction Z is the first battery module M.

[0120] The first battery module M is located inside the housing structure 30, meaning that in the first battery module M, both the battery cell assembly 10 and the first electrical connection structure 20 are located inside the housing structure 30.

[0121] A battery cell assembly 10 refers to an assembly structure formed by electrically connecting and fixing multiple battery cells 111. Within the battery cell assembly 10, multiple battery cells 10 are electrically connected.

[0122] The first direction Y is the spacing distribution direction of the multiple battery cell components 10 in the first battery module M.

[0123] The first end a and the second end b are two opposite ends of the battery cell assembly 10 along the second direction Z, specifically the end positions of the two opposite ends of the battery cell assembly 10 along the second direction Z.

[0124] The first electrical connection structure 20 refers to a conductive structure used to electrically connect two adjacent battery cell assemblies 10. Specifically, the first electrical connection structure 20 is electrically connected to two adjacent battery cell assemblies 10, so that the two adjacent battery cell assemblies 10 are electrically connected through the first electrical connection structure 20. In some possible designs, such as... Figure 3 and Figure 7 As shown, in the first battery module M, there are three or more battery cell components 10, and multiple first electrical connection structures 20. Each first electrical connection structure 20 is electrically connected to two adjacent battery cell components 10, so that the multiple battery cell components 10 in the first battery module M are electrically connected through multiple first electrical connection structures 20. In the first battery module M, multiple battery cell components 10 can be connected in series, in parallel, or in a mixed connection through multiple first electrical connection structures 20. A mixed connection of multiple battery cell components 10 means that there are both series and parallel connections among the multiple battery cell components 10. Alternatively, in some other possible designs, in the first battery module M, there are two battery cell components 10, and one first electrical connection structure 20. The first electrical connection structure 20 is electrically connected to two battery cell components 10, so that the two battery cell components 10 in the first battery module M are connected in series or in parallel.

[0125] The first electrical connector 21 is a conductive component of the first electrical connection structure 20. The material of the first electrical connector 21 can be copper, aluminum, etc. For example, the first electrical connector 21 can be an aluminum sheet. Alternatively, the first electrical connector 21 can be a copper sheet.

[0126] The second electrical connection portion 212 and the two first electrical connection portions 211 are the three parts of the first electrical connector 21. Both the first electrical connection portion 211 and the second electrical connection portion 212 have conductive properties.

[0127] The second electrical connection 212 is electrically connected between the two first electrical connection parts 211, meaning that the second electrical connection part 212 is disposed between the two first electrical connection parts 211, and both ends of the second electrical connection part 212 are respectively connected to the two first electrical connection parts 211, so that the first electrical connection parts 211 and the second electrical connection part 212 are electrically connected.

[0128] The two first electrical connection portions 211 of the first electrical connector 21 are respectively electrically connected to the battery cells 111 of two adjacent battery cell assemblies 10. This means that in the first electrical connector 21, one of the first electrical connection portions 211 is electrically connected to the battery cell 111 of one of the two adjacent battery cell assemblies 10, and the other electrical connection portion is electrically connected to the battery cell 111 of the other battery cell assembly 10, so that the two battery cell assemblies 10 are electrically connected through the first electrical connector 21.

[0129] Based on the first electrical connection portion 211 being disposed on the first end a, in some possible designs, such as Figure 3 and Figure 5 As shown, the first electrical connection 211 can be directly disposed at the first end a position of the battery cell 111, and the first electrical connection 211 and the battery cell 111 are electrically connected directly or indirectly. Alternatively, in some other possible designs, the first electrical connection 211 can be disposed at the first end a position of other components of the battery cell assembly 10 besides the battery cell 111. For example, the first electrical connection 211 can be disposed at the first end a position of the limiting beam 13 mentioned below, and the first electrical connection 211 and the battery cell 111 are indirectly electrically connected through a busbar or other busbar component.

[0130] The second electrical connection portion 212 is bent relative to the first electrical connection portion 211 toward the second end b. This means that the first electrical connection portion 211 and the second electrical connection portion 212 are distributed sequentially along the direction from the second end b to the first end a, i.e., the first electrical connection portion 211 is located at the end of the second electrical connection portion 212 closer to the first end a along the second direction Z. Furthermore, the second electrical connection portion 212 is bent relative to the first electrical connection portion 211, and extends approximately along the direction from the first end a to the second end b. In the direction from the first end a to the second end b, the second electrical connection portion 212 can extend strictly along the second direction Z, or it can be inclined relative to the second direction Z; the second electrical connection portion 212 can extend in a straight line or extend in a bent direction.

[0131] Understandably, in the first electrical connector 21, two first electrical connectors 211 are spaced apart along the first direction Y.

[0132] The receiving space 102 is a space formed by bending the second electrical connection portion 212. Specifically, the second electrical connection portion 212 is recessed along the second direction Z on the side near the first end a, so as to form the receiving space 102. That is, the opening of the receiving space 102 is located approximately on one side of the second electrical connection portion 212 along the second direction Z.

[0133] The accommodating space 102 is at least partially located between two adjacent battery cell assemblies 10, meaning that in the first direction Y, at least partially located in the space formed between two adjacent battery cell assemblies 10.

[0134] As an example, such as Figure 3 and Figure 7 As shown, in the first direction Y, the second electrical connection portion 212 and the receiving space 102 are disposed in the space formed between two adjacent battery cell assemblies 10.

[0135] As an example, such as Figure 3 , Figures 5 to 7 As shown, on the projection plane perpendicular to the third direction X, the orthographic projection of the second electrical connection 212 is approximately "U" shaped. The third direction X intersects the first direction Y, and the third direction X intersects the second direction Z, but the first direction Y, the second direction Z, and the third direction X do not simultaneously lie in the same plane.

[0136] Wherein, the intersection of the first direction Y and the second direction Z means that the first direction Y and the second direction Z can form an angle greater than 0° and less than 180°, that is, the first direction Y and the second direction Z are not parallel. The first direction Y and the second direction Z can be perpendicular to each other or not perpendicular. The first direction Y and the second direction Z can be directions intersecting on the same plane or directions on planes that are skew to each other, and the projection of the second direction Z onto the plane containing the first direction Y can intersect the first direction Y. The meaning of the intersection of the first direction Y and the third direction X, and the meaning of the intersection of the second direction Z and the third direction X, can be explained in the same way as the intersection of the first direction Y and the second direction Z, and will not be repeated here. As an example, the first direction Y and the second direction Z are perpendicular, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X. As an example, the first direction Y is the length direction of the battery device 100, the second direction Z is the height direction of the battery device 100, that is, the vertical direction, and the third direction X is the width direction of the battery device 100.

[0137] It should be noted that the component to be accommodated can be the crossbeam or longitudinal beam of vehicle 1000, or other components.

[0138] The battery device 100 provided in this application embodiment comprises a plurality of battery cell assemblies 10 of a first battery module M arranged at intervals along a first direction Y. A first electrical connection portion 211 of a first electrical connector 21 is disposed on a first end a of a battery cell assembly 10 along a second direction Z. A second electrical connection portion 212 is bent relative to the first electrical connection portion 211 toward a second end b. The second electrical connection portion 212 is bent to form a receiving space 102 that is at least partially disposed between two adjacent battery cell assemblies 10. This allows the first electrical connection portion 211 and the second electrical connection portion 212 to be bent at an angle formed between one end of a battery cell assembly 10 along the second direction Z and the side of a battery cell assembly 10 along the first direction Y toward an adjacent battery cell assembly 10. At least a portion of the receiving space 102 formed by the bending of the second electrical connection portion 212 is accommodated between two adjacent battery cell assemblies 10. The second electrical connection portion 212 can be approximately U-shaped in its orthographic projection perpendicular to a third direction X. In this way, the crossbeam or longitudinal beam can be inserted into the accommodating space 102, and the first electrical connector 21 can better avoid the crossbeam or longitudinal beam, improving the problem that the arrangement of the crossbeam or longitudinal beam is interfered with by the first electrical connection structure 20. This makes it easier for the crossbeam or longitudinal beam of the vehicle 1000 to be accommodated in the space formed between two adjacent battery cell modules 10, thereby improving the arrangement and adaptation of the battery device 100 on the vehicle 1000.

[0139] Specifically, when the crossbeam or longitudinal beam of the vehicle 1000 is housed in the space between two adjacent battery cell assemblies 10 along the first direction Y, the crossbeam or longitudinal beam is inserted into the housing space 102, a portion of the second electrical connection portion 212 is distributed along the second direction Z with the crossbeam or longitudinal beam, and the other portion of the second electrical connection portion 212 is located on opposite sides of the crossbeam or longitudinal beam along the first direction Y.

[0140] Specifically, by bending the second electrical connection portion 212 relative to the first electrical connection portion 211 toward the second end b, the accommodating space 102 occupies a larger space between two adjacent battery cell assemblies 10 in the first direction Y, thus achieving a higher space utilization rate of the accommodating space 102 between two adjacent battery cell assemblies 10 in the first direction Y. In this way, when the positions of multiple battery cell assemblies 10 are predetermined along the first direction Y, the accommodating space 102 has a larger size in the first direction Y, making it easier for the crossbeams or longitudinal beams of the vehicle 1000 to be accommodated within the space between two adjacent battery cell assemblies 10. When the crossbeams or longitudinal beams of the vehicle 1000 can be accommodated within the space between two adjacent battery cell assemblies 10, i.e., when the size of the accommodating space 102 in the first direction Y is predetermined, it is not necessary to increase the size of the space formed by the spacing between two adjacent battery cell assemblies 10 along the first direction Y, thus preventing an excessive increase in the overall size of the battery device 100.

[0141] In some embodiments, please refer to Figure 4 The battery cell 111 includes a housing 1111, an electrode assembly, and an electrode terminal 1112. The electrode assembly is disposed inside the housing 1111, and the electrode terminal 1112 is disposed at one end of the housing 1111 along the second direction Z. The electrode terminal 1112 is electrically connected to the electrode assembly, and the first electrical connection part 211 is electrically connected to the electrode terminal 1112.

[0142] Understandably, in the first electrical connector 21, the two first electrical connection portions 211 are respectively electrically connected to the electrode terminals 1112 of the battery cells 111 of two adjacent battery cell assemblies 10, so that the two adjacent battery cell assemblies 10 are electrically connected through the first electrical connector 21.

[0143] Understandably, the electrode terminal 1112 is located at the first end a of the battery cell 111. The first electrical connection portion 211 is located at the end of the second electrical connection portion 212 close to the electrode terminal 1112 along the second direction Z. The second electrical connection portion 212 is bent relative to the first electrical connection portion 211 along the second direction Z in a direction away from the electrode terminal 1112, and the second electrical connection portion 212 extends along the second direction Z in a direction away from the electrode terminal 1112.

[0144] In some embodiments, the first electrical connection structure 20 further includes a second electrical connector, which is electrically connected between the battery cell 111 and the first electrical connection portion 211.

[0145] The second electrical connector refers to a component with conductive properties. The material of the second electrical connector can be copper, aluminum, etc. For example, the second electrical connector can be an aluminum sheet. Or, for example, the second electrical connector can be a copper sheet.

[0146] The second electrical connector is electrically connected between the battery cell 111 and the first electrical connection part 211. This means that the second electrical connector is disposed between the battery cell 111 and the first electrical connection part 211, and the second electrical connector is electrically connected between the battery cell 111 and the first electrical connection part 211.

[0147] Specifically, the second electrical connector is electrically connected to the electrode terminal 1112 of the battery cell 111.

[0148] Understandably, the first electrical connector 21 and the second electrical connector are two components. The first electrical connector 21 and the first electrical connection part 211 are electrically connected, meaning that the first electrical connector 21 and the second electrical connector are separately connected. The first electrical connection part 211 of the first electrical connector 21 and the second electrical connector can be separately connected by means of bolt fixing, welding, bonding, etc.

[0149] Understandably, the first electrical connector 21 is indirectly electrically connected to the electrode terminal 1112 of the battery cell 111 through the second electrical connector.

[0150] As an example, the first electrical connector 21 and the second electrical connector are made of different materials. The first electrical connection portion 211 of the first electrical connector 21 and the second electrical connector are fixedly connected by bolts. An output electrode base is provided on the battery cell assembly, and the connection portion of the first electrical connection portion 211 of the first electrical connector 21 and the second electrical connector is provided on the output electrode base to achieve a fixed connection through the output electrode base.

[0151] As an example, the first electrical connector 21 is a copper sheet, and the second electrical connector is an aluminum sheet.

[0152] This allows the first electrical connection structure 20 to be a composite structure. On one hand, it facilitates the use of the same material as the second electrical connector and the electrode terminal 1112, enabling electrical connection between the second electrical connector and the electrode terminal 1112. On the other hand, it allows the first electrical connector 21 to be made of copper, thereby improving the conductivity of the first electrical connection structure 20 and enhancing its vibration resistance.

[0153] In some embodiments, the first electrical connector 21 is integrally formed, and the first electrical connection portion 211 extends to the electrode terminal 1112.

[0154] The first electrical connector 21 is integrally formed, meaning that the first electrical connector 21 is a one-piece structure. Specifically, the first electrical connection portion 211 and the second electrical connection portion 212 are integrally formed.

[0155] Understandably, the first electrical connection portion 211 contacts the electrode terminal 1112, so that the first electrical connection portion 211 and the electrode terminal 1112 are directly electrically connected. The first electrical connection portion 211 and the electrode terminal 1112 can be fixedly connected by means of welding, bolting, or conductive adhesive bonding.

[0156] Understandably, the first electrical connection portion 211 is disposed at one end of the battery cell 111 along the second direction Z.

[0157] Compared to the scheme where the first electrical connector 21 and the second electrical connector are fixed to the output electrode base by bolts, in this embodiment, the first electrical connector 21 is integrally formed and extends to the electrode terminal 1112. This means that when the first electrical connector 21 is electrically connected to two adjacent battery cell assemblies 10, it is not necessary to increase the contact area of ​​the connection portion of the first electrical connector 21 and the second electrical connector to increase the current-carrying area of ​​the connection portion. Therefore, it is not necessary to increase the size of the connection portion of the first electrical connector 21 and the second electrical connector along the first direction Y, nor is it necessary to correspondingly increase the size of the output electrode base along the first direction Y. Therefore, the first electrical connection portion 211 can basically not extend between two adjacent battery cell assemblies 10 along the first direction Y. This can further improve the space utilization rate of the accommodating space 102 between two adjacent battery cell assemblies 10 in the first direction Y. That is, it can make the accommodating space 102 occupy a larger space between two adjacent battery cell assemblies 10 in the first direction Y, thereby further facilitating the accommodating of the crossbeam or longitudinal beam of the vehicle 1000 in the space between two adjacent battery cell assemblies 10.

[0158] Furthermore, by integrally molding the first electrical connector 21, the number of components in the first electrical connection structure 20 is reduced. On one hand, this simplifies the operation steps of electrically connecting two adjacent battery cell assemblies 10 using the first electrical connection structure 20, improving the assembly efficiency of the battery device 100 and reducing its manufacturing cost. On the other hand, it helps to improve the reliability of the electrical connection between two adjacent battery cell assemblies 10.

[0159] In some embodiments, the first electrical connection portion 211 is welded to the electrode terminal 1112.

[0160] This configuration improves the convenience and reliability of the electrical connection between the first electrical connection part 211 and the battery cell 111.

[0161] In some embodiments, please refer to the following: Figures 3 to 5 , Figure 7 The battery cell 111 includes two electrode terminals 1112, which are spaced apart along a third direction X.

[0162] In some embodiments, please refer to the following: Figure 5 and Figure 6 The second electrical connection portion 212 has a rib 2123 on at least one side.

[0163] Understandably, the rib 2123 is part of the second electrical connection portion 212.

[0164] Among them, the rib 2123 is a rib structure formed on the second electrical connection part 212.

[0165] The presence of ribs 2123 on the second electrical connection portion 212 improves the structural strength of the second electrical connection portion 212. This helps to reduce the shear force on the second electrical connection portion 212, lowers the risk of breakage of the second electrical connection portion 212, and improves the reliability of the electrical connection between two adjacent battery cell assemblies 10.

[0166] Optionally, such as Figure 6 As shown, the first electrical connector 21 is sheet-shaped, and the second electrical connector 212 has a rib 2123 on at least one side along its own thickness direction.

[0167] In some embodiments, please refer to the following: Figure 5 and Figure 6 At least one side of the second electrical connection 212 is provided with a buffer 22.

[0168] Buffer component 22 refers to a component with cushioning properties. Buffer component 22 can be made of materials such as foam or silicone.

[0169] A buffer 22 is provided on the second electrical connection portion 212 to provide a buffering effect between at least one of the following: between the second electrical connection portion 212 and the battery cell assembly 10; between the second electrical connection portion 212 and the housing structure 30; and between the second electrical connection portion 212 and an adjacent battery module. This buffers the assembly tolerances of the first electrical connection structure 20 within the battery device 100. On the one hand, this improves the assembly stability of the first electrical connection structure 20 within the battery device 100. On the other hand, it reduces the risk of breakage of the first electrical connection structure 20 and improves the electrical connection reliability between two adjacent battery cell assemblies 10.

[0170] Optionally, such as Figure 6 As shown, the first electrical connector 21 is sheet-shaped, and the second electrical connector 212 has a buffer 22 on at least one side along its own thickness direction.

[0171] In some embodiments, please refer to the following: Figures 5 to 8 ,in, Figure 8 for Figure 7 Enlarged view at point B. The second electrical connection portion 212 includes a first bent section 2121 and two second bent sections 2122. The two second bent sections 2122 are electrically connected to the opposite ends of the first bent section 2121 and the two first electrical connections 211, respectively. One end of the second bent section 2122 is bent relative to the first bent section 2121, and the other end of the second bent section 2122 is bent relative to the first electrical connection portion 211. The first bent section 2121 and the second bent section 2122 enclose and form an accommodating space 102.

[0172] The first bend segment 2121 and the two second bend segments 2122 are the three parts of the second electrical connection portion 212.

[0173] The two second bending segments 2122 are electrically connected to the opposite ends of the first bending segment 2121 and the two first electrical connection parts 211, respectively. This means that in the first electrical connector 21, one end of one second bending segment 2122 is electrically connected to one of the first electrical connection parts 211, and the other end is electrically connected to one end of the first bending segment 2121; one end of the other second bending segment 2122 is electrically connected to the other first electrical connection part 211, and the other end is electrically connected to the other end of the first bending segment 2121.

[0174] Understandably, the second bent segment 2122 is bent and extended relative to the first electrical connection portion 211 along the second direction Z toward the electrode terminal 1112, and the end of the second bent segment 2122 away from the first electrical connection portion 211 is bent relative to the first bent segment 2121. Thus, the second electrical connection portion 212 is approximately "U" shaped.

[0175] Understandably, the first bending segment 2121 and the second bending segment 2122 are located between two adjacent battery cell assemblies 10.

[0176] Understandably, the first electrical connection 211, the first bending segment 2121, and the second bending segment 2122 are integrally formed.

[0177] Understandably, the first bending segment 2121 and the second bending segment 2122 bend to form the accommodating space 102.

[0178] By adopting the above technical solution, the second electrical connection 212 can effectively avoid the crossbeams or longitudinal beams of the vehicle 1000. Specifically, when the crossbeams and longitudinal beams of the vehicle 1000 are accommodated between two adjacent battery cell assemblies 10, the first bending section 2121 is distributed along the second direction Z with the crossbeam or longitudinal beam, and the two second bending sections 2122 of the first electrical connection 21 are respectively located on opposite sides of the crossbeam or longitudinal beam along the first direction Y.

[0179] Furthermore, the integral molding of the first electrical connection portion 211 and the second bending segment 2122 eliminates the need to consider the contact area between them for electrical connection. This eliminates the need to increase the size of the connection portion along the first direction Y, and also eliminates the need for an output electrode base. When the first electrical connector 21 is electrically connected to two adjacent battery cell assemblies 10, the first electrical connection portion 211 can essentially not extend between the two adjacent battery cell assemblies 10 along the first direction Y. In the first direction Y, the space occupied by the first electrical connection structure 20 between the two adjacent battery cell assemblies 10 is essentially the thickness of the second bending segment 2122. In this way, the space utilization rate of the accommodating space 102 between two adjacent battery cell components 10 can be further improved in the first direction Y. That is, the accommodating space 102 can occupy a larger space between two adjacent battery cell components 10 in the first direction Y, so that the first electrical connector 21 can better avoid the crossbeam or longitudinal beam, improve the problem of the arrangement of the crossbeam or longitudinal beam being interfered with by the first electrical connection structure 20, and facilitate the crossbeam or longitudinal beam of the vehicle 1000 to be accommodated in the space formed by the interval between two adjacent battery cell components 10, thereby improving the arrangement and adaptation of the battery device 100 on the vehicle 1000.

[0180] In some embodiments, please refer to Figure 6 The first bent segment 2121 has a rib 2123 on at least one side along the second direction Z.

[0181] In some embodiments, please refer to the following: Figure 5 and Figure 6 The second bending segment 2122 has a rib 2123 on at least one side along the first direction Y.

[0182] By adopting the above technical solution, at least one of the first bending segment 2121 and the second bending segment 2122 of the second electrical connection portion 212 has a rib 2123, which helps to increase the rib 2123 and further improve the structural strength of the second electrical connection portion 212.

[0183] In some embodiments, please refer to Figure 6 The first bending segment 2121 is provided with a buffer 22 on at least one side along the second direction Z; In some embodiments, please refer to the following: Figure 5 and Figure 6 The second bending segment 2122 is provided with a buffer 22 on at least one side along the first direction Y.

[0184] By adopting the above technical solution, at least one of the first bending segment 2121 and the second bending segment 2122 of the second electrical connection portion 212 is provided with a buffer member 22. This helps the second electrical connection portion 212 to be buffered by the buffer member 22 in the first direction Y and the second direction Z, which helps to further improve the assembly stability of the first electrical connection structure 20 in the battery device 100 and further reduce the risk of breakage of the first electrical connection structure 20.

[0185] In some embodiments, the battery cell assembly 10 includes at least one battery cell row 11, and the battery cell row 11 includes a plurality of battery cells 111. In the battery cell row 11, the plurality of battery cells 111 are distributed along a first direction Y.

[0186] Among them, the battery cell row 11 refers to a row of battery cells 111 formed by arranging multiple battery cells 111 along the first direction Y.

[0187] In some embodiments, such as Figure 3 and Figure 7 As shown, the battery cell assembly 10 includes multiple rows of battery cells 11, which are distributed along a third direction X. The first direction Y intersects with the third direction X, and the second direction Z intersects with the third direction X. The first direction Y, the second direction Z, and the third direction X are not simultaneously located in the same plane.

[0188] In some embodiments, please refer to the following: Figure 3 and Figure 7 The battery cell assembly 10 also includes a third electrical connector 12. In the battery cell assembly 10, the third electrical connector 12 is electrically connected to the battery cells 111 of two battery cell rows 11 distributed along a third direction X, so as to electrically connect the multiple battery cell rows 11.

[0189] The third electrical connector 12 refers to a structure with conductive properties.

[0190] In some embodiments, the battery cell assembly 10 may further include a busbar. In the battery cell row 11, multiple battery cells 111 are electrically connected through the busbar.

[0191] Alternatively, in some other embodiments, the number of battery cell rows 11 in the battery cell assembly 10 is one. That is, in the battery cell assembly 10, a plurality of battery cells 111 are distributed along the first direction Y.

[0192] In some embodiments, please refer to the following: Figures 3 to 8The two first electrical connection portions 211 of the first electrical connector 21 are spaced apart along a third direction X. The first direction Y and the second direction Z are perpendicular, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0193] Understandably, in the first electrical connector 21, two first electrical connection portions 211 are spaced apart along the first direction Y and spaced apart along the third direction X.

[0194] Among these, in some possible designs, such as Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, in the first electrical connector 21, the first bent segment 2121 is inclined relative to the first direction Y and the third direction X.

[0195] Understandably, in the first electrical connector 21, on the projection plane perpendicular to the second direction Z, the extension direction of the orthographic projection of the first bent segment 2121 is inclined relative to the first direction Y, and the extension direction of the orthographic projection of the first bent segment 2121 is also inclined relative to the third direction X. That is, the first bent segment 2121 extends along the direction between the first direction Y and the third direction X.

[0196] In some possible designs, in the first electrical connector 21, the second bent segment 2122 is inclined relative to the second direction Z and the third direction X.

[0197] Understandably, in the first electrical connector 21, on the projection plane perpendicular to the first direction Y, the extension direction of the orthographic projection of the second bend is inclined relative to the second direction Z, and the extension direction of the orthographic projection of the second bend segment 2122 is also inclined relative to the third direction X.

[0198] By having the two first electrical connection portions 211 of the first electrical connector 21 spaced apart along a third direction X, it is convenient for the electrical connection method of the battery cell rows 11 in two adjacent battery cell assemblies 10 along the first direction Y to be the same. Specifically, it is convenient for the structure of the busbar components on two adjacent battery cell assemblies 10 to be the same, so that the busbar components of two adjacent battery cell assemblies 10 can be shared. This helps to reduce the types of components in the battery device 100 and facilitates the manufacturing of the battery device 100. By having at least one of the first bending section 2121 and the second bending section 2122 in the second electrical connection inclined, on the one hand, the two first electrical connection portions 211 of the first electrical connector 21 are spaced apart along a third direction X. On the other hand, it is beneficial to increase the vibration resistance of the first electrical connector 21.

[0199] In some embodiments, please refer to the following: Figure 3 , Figures 7 to 9 ,in, Figure 9 for Figure 8 A partial schematic diagram shows a battery cell assembly 10 comprising multiple rows 11 of battery cells distributed along a third direction X, and each row 11 comprising multiple battery cells 111 distributed along a first direction Y. In two adjacent battery cell assemblies 10, the multiple rows 11 of battery cells are arranged facing each other along the first direction Y. Any two rows 11 of battery cells facing each other along the first direction Y have the same number of battery cells 111, and the electrical connection method of any two rows 11 of battery cells facing each other along the first direction Y is the same. The first direction Y is perpendicular to the second direction Z, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0200] For ease of description, two adjacent battery cell assemblies 10 along the first direction Y are defined as the first battery cell assembly 10a and the second battery cell assembly 10b. It can be understood that the plurality of battery cell rows 11 of the first battery cell assembly 10a and the plurality of battery cell rows 11 of the second battery cell assembly 10b are arranged facing each other along the first direction Y.

[0201] In the battery cell array 11, multiple battery cells 111 are electrically connected through a busbar. The electrical connection method of the battery cell array 11 refers to the way the busbar connects the multiple battery cells 111 in the battery cell array 11. The same electrical connection method means that the busbars have the same structure.

[0202] By ensuring that the electrical connection method of any two battery cell rows 11 facing each other along the first direction Y is the same, the structure of the busbar components on any two battery cell rows 11 facing each other along the first direction Y is identical. In this way, two adjacent battery cell assemblies 10 can share the busbar components, which helps to reduce the types of components in the battery device 100 and facilitates the manufacturing of the battery device 100.

[0203] In some embodiments, please refer to the following: Figure 3 and Figure 7 The first battery module M has an electrode output terminal O.

[0204] The electrode output terminal O refers to the electrode structure used to transmit electrical energy of the first battery module M. It can be an electrode terminal 1112, or an electrical connector, a plate, or other electrical device.

[0205] Understandably, there are two electrode output terminals O, and the polarity of the two electrode output terminals O is the same.

[0206] Of the two electrode output terminals O, one electrode output terminal O is located on one of the battery cell components 10, and the other electrode output terminal O is located on the other battery cell component 10.

[0207] Of the two electrode output terminals O, one electrode output terminal O is used to supply power input into the first battery module M, and the other electrode output terminal O is used to supply power output to the first battery module M.

[0208] In some embodiments, please refer to the following: Figures 3 to 9 The battery cell assembly 10 also includes a third electrical connector 12. In the battery cell assembly 10, the third electrical connector 12 is electrically connected to the battery cells 111 of two battery cell rows 11 distributed along a third direction X, so as to electrically connect the multiple battery cell rows 11. Two adjacent battery cell assemblies 10 are respectively a first battery cell assembly 10a and a second battery cell assembly 10b. In the second battery cell assembly 10b, the battery cells 111 electrically connected to the first battery cell assembly 10a through the first electrical connector 21 are the first battery cells 111a.

[0209] Among these, in some possible designs, such as Figure 9 As shown, in the first battery cell assembly 10a, the battery cell 111 corresponding to the position of the first battery cell 111a is electrically connected to the third electrical connector 12.

[0210] In some other possible designs, the first battery cell assembly 10a has an electrode output terminal O, and in the first battery cell assembly 10a, the battery cell 111 corresponding to the position of the first battery cell 111a is electrically connected to the electrode output terminal O.

[0211] By adopting the above technical solution, in the process of arranging the first electrical connection structure 20 to electrically connect multiple battery cell assemblies 10, it is not necessary to change the electrical connection method in each battery cell row 11, that is, it is not necessary to change the busbar component, so that the structure of the busbar component of two adjacent battery cell assemblies 10 can be set to be the same, so that the busbar component of two adjacent battery cell assemblies 10 can be shared. This helps to reduce the types of components in the battery device 100 and facilitates the processing of the battery device 100.

[0212] In some embodiments, please refer to the following: Figure 3 and Figure 10 ,in, Figure 10 for Figure 3Enlarged view at point C. The battery cell assembly 10 includes a third electrical connector 12 and a plurality of battery cell rows 11 distributed along a third direction X. Each battery cell row 11 includes a plurality of battery cells 111 distributed along a first direction Y. In the battery cell assembly 10, the third electrical connector 12 is electrically connected to the battery cells 111 of two battery cell rows 11 distributed along the third direction X, thereby electrically connecting the plurality of battery cell rows 11. The third electrical connector 12 includes a fourth electrical connection portion 122 and two third electrical connection portions 121, with the fourth electrical connection portion 122 electrically connected between the two third electrical connection portions 121. In the battery cell assembly 10, the two third electrical connection portions 121 of the third electrical connector 12 are respectively electrically connected to the battery cells 111 of the two battery cell rows 11, thereby electrically connecting the plurality of battery cell rows 11. The third electrical connection portion 121 is disposed at the first end a position of the battery cell array 11, and the fourth electrical connection portion 122 is bent toward the second end b relative to the third electrical connection portion 121, and the fourth electrical connection portion 122 is disposed on one side of the battery cell array 11 along the first direction Y. The first direction Y is perpendicular to the second direction Z, the second direction Z is perpendicular to the third direction X, and the first direction Y is perpendicular to the third direction X.

[0213] The third electrical connector 12 refers to a conductive structure used to electrically connect multiple battery cell arrays 11 in the battery cell assembly 10.

[0214] The fourth electrical connection portion 122 and the two third electrical connection portions 121 are the three parts of the third electrical connector 12, all of which have conductive properties. The third electrical connection portion 121 and the fourth electrical connection portion 122 are integrally formed.

[0215] The fourth electrical connection 122 is electrically connected between the two third electrical connection parts 121, meaning that the fourth electrical connection 122 is disposed between the two third electrical connection parts 121, and both ends of the fourth electrical connection 122 are respectively connected to the two third electrical connection parts 121, so that the third electrical connection parts 121 and the fourth electrical connection part 122 are electrically connected.

[0216] The two third electrical connection portions 121 of the third electrical connector 12 are respectively electrically connected to the battery cells 111 of the two battery cell rows 11 distributed along the third direction X. This means that in the battery cell assembly 10, the two third electrical connection portions 121 of the third electrical connector 12 are respectively electrically connected to the battery cells 111 of two of the battery cell rows 11. That is, in the battery cell assembly 10, one of the third electrical connection portions 121 of the third electrical connector 12 is electrically connected to the battery cells 111 of one of the battery cell rows 11, and the other third electrical connection portion 121 of the third electrical connector 12 is electrically connected to the battery cells 111 of the other battery cell row 11, so that the two battery cell rows 11 are electrically connected, thereby enabling the multiple battery cell rows 11 of the battery cell assembly 10 to be electrically connected through the third electrical connector 12.

[0217] Understandably, the third electrical connection 121 is disposed at the end of the battery cell array 11 that is close to the electrode terminal 1112 along the second direction Z, and the fourth electrical connection 122 is bent away from the electrode terminal 1112 along the second direction Z.

[0218] The fourth electrical connection portion 122 is bent relative to the third electrical connection portion 121 toward the second end b, and is located on one side of the battery cell array 11 along the first direction Y, so that the fourth electrical connection portion 122 can better abut against the surface of the battery cell assembly 10 along the first direction Y. In this way, the third electrical connection portion 121 can basically not extend into the space between two adjacent battery cell assemblies 10 along the first direction Y, thus improving the space utilization rate of the accommodating space 102 between two adjacent battery cell assemblies 10 in the first direction Y, that is, allowing the accommodating space 102 to occupy a larger space between two adjacent battery cell assemblies 10 in the first direction Y. This allows the first electrical connector 21 to better avoid the crossbeam or longitudinal beam, improving the problem of interference of the first electrical connection structure 20 with the arrangement of the crossbeam or longitudinal beam, and facilitating the accommodating of the crossbeam or longitudinal beam of the vehicle 1000 within the space formed by the interval between two adjacent battery cell assemblies 10, thereby improving the arrangement and adaptation of the battery device 100 on the vehicle 1000.

[0219] In some embodiments, please refer to the following: Figure 3 , Figures 7 to 9 Two battery cells 111, which are electrically connected to the first electrical connector 21, are positioned facing each other along the first direction Y.

[0220] Understandably, two adjacent battery cell assemblies 10 and a first electrical connector 21 electrically connected to the two adjacent battery cell assemblies 10 are arranged facing each other along the first direction Y. The battery cell 111 of one of the battery cell assemblies 10 electrically connected to one of the first electrical connectors 211 and the battery cell 111 of the other battery cell assembly 10 electrically connected to the other first electrical connector 211 are arranged facing each other.

[0221] This design ensures that the distance between the two first electrical connection portions 211 of the first electrical connector 21 along the third direction X is not too large, thereby preventing the overall extension length of the first electrical connection structure 20 along the third direction X from being too large. This mitigates the cracking problem of the first electrical connection structure 20 and, to a certain extent, ensures the fixation of the first electrical connection structure 20 within the battery device 100 and the reliability of the electrical connection between adjacent battery cell assemblies 10.

[0222] In some embodiments, please refer to the following: Figure 3 , Figure 4 , Figures 6 to 9 The battery cell 111 has two electrode terminals 1112, which are spaced apart along a third direction X. The two first electrical connection portions 211 of the first electrical connector 21 are also spaced apart along a third direction X. The first direction Y and the second direction Z are perpendicular, the second direction Z is perpendicular to the third direction X, and the first direction Y is perpendicular to the third direction X.

[0223] Understandably, the battery cell assembly 10 includes at least one battery cell row 11, with each battery cell row 11 of two adjacent battery cell assemblies 10 being arranged facing each other along a first direction Y. The number of battery cells 111 in the battery cell rows 11 of the two battery cell assemblies 10 that are facing each other along the first direction Y is the same.

[0224] This configuration ensures that the battery cell rows 11 of two battery cell assemblies 10 facing each other along the first direction Y have the same electrical connection method. In this way, the structure of the busbar of two adjacent battery cell assemblies 10 can be set to be the same, so that the busbar of two adjacent battery cell assemblies 10 can be shared. This helps to reduce the types of components in the battery device 100 and facilitates the processing of the battery device 100.

[0225] In other embodiments, the two electrode terminals 1112 of the battery cell 111 may be spaced apart along the first direction Y.

[0226] In some embodiments, the battery cell assembly 10 includes a plurality of battery cells 111 distributed along a first direction Y, and two adjacent battery cell assemblies 10 are electrically connected in the same manner.

[0227] Understandably, the battery cell assembly 10 includes a battery cell row 11, which includes a plurality of battery cells 111 distributed along a first direction Y.

[0228] Understandably, the electrical connection of two adjacent battery cell assemblies 10 is the same, so that the busbar components of two adjacent battery cell assemblies 10 can be set to be the same.

[0229] In some embodiments, please refer to the following: Figure 3 , Figure 5 , Figures 7 to 9 The battery cell assembly 10 also includes two limiting beams 13, which are spaced apart along a first direction Y. In the battery cell assembly 10, the battery cell 111 is positioned between the two limiting beams 13 along the first direction Y. In the battery cell assembly 10, a portion of the second electrical connection portion 212 extends along the limiting beams 13 away from the surface of the battery cell 111.

[0230] The limiting beam 13 refers to the beam structure used to limit the position of the battery cell 111. Specifically, in the battery cell assembly 10, two limiting beams 13 are used to limit the position of the battery cell 111 along the first direction Y.

[0231] Understandably, the first electrical connection 211 is disposed at the position of the first end a of the limiting beam 13.

[0232] Understandably, in the battery cell assembly 10, the first electrical connection portion 211 and the second electrical connection portion 212 are bent at the angle between one end of the limiting beam 13 along the second direction Z and the side surface of the limiting beam 13 away from the battery cell 111 along the first direction Y, and a portion of the second electrical connection portion 212 extends along the surface of the limiting beam 13 away from the battery cell 111 along the first direction Y.

[0233] This arrangement allows the second electrical connection portion 212 to be as close as possible to the surface of the limiting beam 13 on the side away from the battery cell 111 along the first direction Y. Specifically, the second bent section 2122 of the second electrical connection 212 can be as close as possible to the surface of the limiting beam 13 away from the battery cell 111 along the first direction Y, so as to reduce the space between the first electrical connection 211 and the second bent section 2122 extending along the first direction Y between the two adjacent battery cell assemblies 10. This can further improve the space utilization rate of the accommodating space 102 between the two adjacent battery cell assemblies 10 in the first direction Y. That is, the accommodating space 102 can occupy a larger space between the two adjacent battery cell assemblies 10 in the first direction Y, so that the first electrical connection 21 can better avoid the crossbeam or longitudinal beam, improve the problem of the arrangement of the crossbeam or longitudinal beam being interfered with by the first electrical connection structure 20, and facilitate the crossbeam or longitudinal beam of the vehicle 1000 to be accommodated in the space formed by the interval between the two adjacent battery cell assemblies 10, thereby improving the arrangement and adaptation of the battery device 100 on the vehicle 1000.

[0234] In some embodiments, please refer to Figure 10 The limiting beam 13 has a first groove 101 at one end along the second direction Z. The first groove 101 passes through the limiting beam 13 along the first direction Y. The first electrical connection part 211 passes through the first groove 101 along the first direction Y.

[0235] The first groove 101 is a groove structure provided at one end of the limiting beam 13 along the second direction Z.

[0236] This design serves two purposes. First, it allows the limiting beam 13 to avoid the first electrical connection portion 211 via the first groove 101, thus mitigating the problem of interference between the limiting beam 13 and the first electrical connection portion 211, which would otherwise lead to an increase in the size of the battery cell assembly 10 along the second direction Z. Second, the first groove 101 can position the first electrical connection structure 20, facilitating its assembly within the battery device 100.

[0237] In some embodiments, please refer to the following: Figure 5 , Figure 6 and Figure 8 The first electrical connection structure 20 also includes an insulating layer 23, which is disposed on the outer surface of the second electrical connection portion 212.

[0238] Insulating layer 23 refers to a structural layer with insulating properties. Insulating layer 23 can be a coating applied to the outer surface of the first electrical connector 21, or it can be a separately formed film layer.

[0239] Understandably, the insulating layer 23 is provided at least on the outer surface of the second electrical connection portion 212.

[0240] This configuration provides insulation protection for the first electrical connector 21, improves the problem of short circuits in the first electrical connector 21, and enhances the reliability of the battery device 100.

[0241] In some embodiments, please refer to the following: Figure 5 , Figure 6 and Figure 8 An insulating layer 23 is provided on part of the outer surface of the first electrical connection part 211.

[0242] Understandably, the insulating layer 23 is disposed on the outer surface of the second electrical connection portion 212 and the surface of a portion of the first electrical connection portion 211.

[0243] This configuration further enhances the insulation protection of the first electrical connector 21, improves the problem of short circuits in the first electrical connector 21, and increases the reliability of the battery device 100.

[0244] In some embodiments, please refer to the following: Figure 2 and Figure 3 The housing structure 30 includes a first part 31 and a second part 32 arranged along a second direction Z. The first battery module M is disposed within the space formed by the first part 31 and the second part 32. The second part 32 has a protrusion and a plurality of second grooves on the side facing the first part 31 along the second direction Z. In the housing structure 30, the plurality of second grooves are spaced apart along a first direction Y, and a protrusion is provided between two adjacent second grooves in the first direction Y. In the first battery module M, at least a portion of a plurality of battery cell assemblies 10 are respectively disposed in the plurality of second grooves, the protrusions are inserted into the receiving space 102, and the second part 32 has a third groove 301 on the side away from the first part 31 along the second direction Z at the position corresponding to the protrusion.

[0245] Understandably, the first battery module M and the first electrical connection structure 20 are both located within the space enclosed by the first part 31 and the second part 32.

[0246] Understandably, the second part 32 is continuously convex and concave along the first direction Y on the side facing the first part 31, and the side of the second part 32 away from the first part 31 is also continuously convex and concave along the first direction Y.

[0247] Understandably, the two second bends of the first electrical connector 21 are located on opposite sides of the protrusion along the first direction Y, and the first bend segment 2121 is located on the side of the protrusion away from the third groove 301 along the second direction Z, so that the first electrical connection structure 20 can be arranged along the shape of the protrusion.

[0248] Optionally, the buffer 22 described above can be used to achieve a buffering effect between the first electrical connector 21 and the protrusion.

[0249] By adopting the above technical solution, the second part 32 of the housing structure 30 is continuously recessed and convex on both sides along the first direction Y along the second direction Z, so that the second part 32 can adaptably accommodate multiple spaced battery cell assemblies 10 and the first electrical connection structure 20 of the first battery module M. In addition, the crossbeam or longitudinal beam of the vehicle 1000 can be accommodated in the third groove 301, which facilitates the assembly of the battery device 100 on the vehicle 1000.

[0250] Specifically, when the crossbeam or longitudinal beam of the vehicle 10000 is accommodated in the third groove 301, the crossbeam or longitudinal beam and the protrusion are inserted together in the accommodating space 102 along the second direction Z, so that the crossbeam or longitudinal beam and the protrusion are inserted together in the space between two adjacent battery cell assemblies 10.

[0251] Specifically, a portion of the second electrical connection 212 is located on the side of the protrusion away from the third groove 301 along the second direction Z.

[0252] In some embodiments, such as Figure 2 As shown, the third groove 301 penetrates the second part 32 along the third direction X. The first direction Y intersects with the third direction X, and the second direction Z intersects with the third direction X, but the first direction Y, the second direction Z, and the third direction X are not simultaneously located in the same plane.

[0253] As an example, the first direction Y is perpendicular to the second direction Z, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0254] In some embodiments, please refer to the following: Figure 2 and Figure 3 The battery device 100 also includes a second battery module N, which includes a plurality of battery cells 111. The second battery module N is disposed within the housing structure 30 and is located on the side of the first battery module M away from the second part 32 along the second direction Z.

[0255] This configuration makes the battery device 100 a multi-layer battery structure stacked along the second direction Z.

[0256] In some embodiments, the first electrical connector 21 is an aluminum sheet.

[0257] On the one hand, the sheet-like design of the first electrical connector 21 helps to further improve the problem of interference between the first electrical connection structure 20 and the crossbeam or longitudinal beam. On the other hand, compared with the solution of combining copper and aluminum bars, it is lower in cost and lighter in weight.

[0258] In some embodiments, please refer to Figure 3The electrode output terminal O of the first battery module M and the second battery module N are electrically connected through the second electrical connection structure 40.

[0259] The second electrical connection structure 40 is a conductive structure with conductive properties.

[0260] In some embodiments, the structure of the second electrical connection structure 40 may be similar to that of the first electrical connection structure 20, or it may be configured as a conductive structure composed of copper and aluminum bars.

[0261] Please see Figure 2 The power-consuming device provided in this application embodiment includes a battery device 100, and is shown in conjunction with other accompanying drawings. The battery device 100 in this embodiment is the same as the battery device 100 in the above embodiments; please refer to the relevant descriptions of the battery device 100 in the above embodiments for details, which will not be repeated here.

[0262] The electrical device provided in this application embodiment, by employing the battery device 100 mentioned above, facilitates the housing of the vehicle 1000's crossbeams or longitudinal beams within the space formed between two adjacent battery cell assemblies 10, thereby improving the assembly convenience of the electrical device.

[0263] As one embodiment of this application, such as Figures 2 to 6As shown, the battery device 100 includes a housing structure 30, a first battery module M, and a second battery module N. The housing structure 30 includes a first portion 31 and a second portion 32 arranged along a second direction Z. The first battery module M and the second battery module N are stacked along the second direction Z, and both the first battery module M and the second battery module N are disposed within the space formed by the first portion 31 and the second portion 32. In the second direction Z, the second battery module N is located on the side of the first battery module M away from the second portion 32. The second battery module N includes a plurality of battery cells 111 arranged in an array. The first battery module M includes a first electrical connection structure 20 and a plurality of battery cell assemblies 10 spaced apart along a first direction Y. Each battery cell assembly 10 includes a plurality of battery cells 111. Each battery cell 111 includes a housing 1111, an electrode assembly, and an electrode terminal 1112. The electrode assembly is disposed inside the housing 1111, and the electrode terminal 1112 is disposed at one end of the housing 1111 along the second direction Z and is electrically connected to the electrode assembly. The first electrical connection structure 20 includes an integrally formed first electrical connector 21. The first electrical connector 21 includes a second electrical connection portion 212 and two first electrical connection portions 211. The second electrical connection portion 212 includes a first bent section 2121 and two second bent sections 2122. The two second bent sections 2122 are respectively electrically connected to opposite ends of the first bent section 2121 and between the two first electrical connection portions 211. One end of the second bent section 2122 is bent relative to the first bent section 2121, and the other end of the second bent section 2122 is bent relative to the first electrical connection portion 211. The two first electrical connection portions 211 of the first electrical connector 21 are respectively electrically connected to the battery cells 111 of two adjacent battery cell assemblies 10. The battery cell assembly 10 has a first end a and a second end b disposed opposite each other along the second direction Z. A first electrical connection portion 211 is disposed on the first end a of the battery cell assembly 10. A second bent section 2122 is bent relative to the first electrical connection portion 211 toward the second end b. The first bent section 2121 and the second bent section 2122 enclose and form a receiving space 102, which is located between two adjacent battery cell assemblies 10. The first electrical connection portion 211 extends to the electrode terminal 1112 of the battery cell 111, and the battery cell 111 has an electrode terminal 1112 at the first end a. The second part 32 has a protrusion and a plurality of second grooves on the side of the second part 31 along the second direction Z toward the first part 31. In the housing structure 30, the plurality of second grooves are spaced apart along the first direction Y, and a protrusion is disposed between two adjacent second grooves in the first direction Y.In the first battery module M, at least portions of multiple battery cell assemblies 10 are respectively disposed in multiple second grooves. A third groove 301 is provided on the side of the second portion 32 away from the second portion 32 along the second direction Z, corresponding to a protrusion. The protrusion is inserted into the receiving space 102. A portion of the second electrical connection portion 212 is disposed on the side of the protrusion away from the third groove 301 along the second direction Z. The third groove 301 penetrates the housing structure 30 along the third direction X. Wherein, the first direction Y is perpendicular to the second direction Z, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0264] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Box structure; A first battery module is disposed within the housing structure. The first battery module includes a first electrical connection structure and a plurality of battery cell assemblies spaced apart along a first direction. Each battery cell assembly has a first end and a second end disposed opposite to each other along a second direction. The first electrical connection structure includes a first electrical connector. The first electrical connector includes two first electrical connection portions and a second electrical connection portion electrically connected between the two first electrical connection portions. The first electrical connection portions are disposed on the first end. The second electrical connection portions are bent relative to the first electrical connection portions toward the second end, and the bending forms at least a partially located accommodating space between two adjacent battery cell assemblies. The accommodating space is used to accommodate a component to be accommodated. Each battery cell assembly includes a plurality of battery cells. The two first electrical connection portions of the first electrical connector are respectively electrically connected to the battery cells of two adjacent battery cell assemblies. The first direction and the second direction intersect.

2. The battery device according to claim 1, characterized in that, The battery cell includes a housing, an electrode assembly, and electrode terminals. The electrode assembly is disposed inside the housing, and the electrode terminals are disposed at one end of the housing along the second direction and are electrically connected to the electrode assembly. The first electrical connector is integrally formed, and the first electrical connection portion extends to the electrode terminal.

3. The battery device according to claim 1, characterized in that, The first electrical connection structure further includes a second electrical connector, which is electrically connected between the battery cell and the first electrical connection portion.

4. The battery device according to any one of claims 1-3, characterized in that, At least one side of the second electrical connection has a raised rib.

5. The battery device according to any one of claims 1-3, characterized in that, At least one side of the second electrical connection is provided with a buffer.

6. The battery device according to any one of claims 1-3, characterized in that, The second electrical connection includes a first bent section and two second bent sections. The two second bent sections are electrically connected to the opposite ends of the first bent section and between the two first electrical connections. One end of the second bent section is bent relative to the first bent section, and the other end of the second bent section is bent relative to the first electrical connection. The first bent section and the second bent section enclose the receiving space.

7. The battery device according to claim 6, characterized in that, The first bent segment has a rib on at least one side along the second direction; and / or, the second bent segment has a rib on at least one side along the first direction.

8. The battery device according to claim 6, characterized in that, The first bent segment is provided with a buffer on at least one side along the second direction; and / or, the second bent segment is provided with a buffer on at least one side along the first direction.

9. The battery device according to claim 6, characterized in that, The two first electrical connection portions of the first electrical connector are spaced apart along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; Wherein, in the first electrical connector, the first bent segment is inclined relative to the first direction and the third direction; and / or, in the first electrical connector, the second bent segment is inclined relative to the second direction and the third direction.

10. The battery device according to any one of claims 1-3, characterized in that, The battery cell assembly includes multiple rows of battery cells distributed along a third direction, and each row of battery cells includes multiple battery cells distributed along the first direction; in two adjacent battery cell assemblies, the multiple rows of battery cells are arranged facing each other along the first direction, and the number and electrical connection method of the battery cells in any two rows of battery cells arranged facing each other along the first direction are the same. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

11. The battery device according to claim 10, characterized in that, The first battery module has an electrode output terminal, and the battery cell assembly further includes a third electrical connector. In the battery cell assembly, the third electrical connector is electrically connected to the battery cells of two battery cell rows distributed along the third direction, so as to electrically connect the multiple battery cell rows; two adjacent battery cell assemblies are respectively the first battery cell assembly and the second battery cell assembly. In the second battery cell assembly, the battery cell electrically connected to the first battery cell assembly via the first electrical connector is the first battery cell; In the first battery cell assembly, the battery cell corresponding to the position of the first battery cell is electrically connected to the third electrical connector; or, the first battery cell assembly has the electrode output terminal, and the battery cell corresponding to the position of the first battery cell is electrically connected to the electrode output terminal.

12. The battery device according to any one of claims 1-3, characterized in that, The battery cell assembly includes a third electrical connector and a plurality of battery cell rows distributed along a third direction. The battery cell rows include a plurality of battery cells distributed along a first direction. The third electrical connector includes two third electrical connection portions and a fourth electrical connection portion electrically connected between the two third electrical connection portions. The two third electrical connection portions of the third electrical connector are respectively electrically connected to the battery cells of the two battery cell rows to electrically connect the plurality of battery cell rows. The third electrical connection portions are disposed at the first end of the battery cell row. The fourth electrical connection portion is bent toward the second end relative to the third electrical connection portion and is disposed on one side of the battery cell row along the first direction. The first direction, the second direction, and the third direction are all perpendicular to each other.

13. The battery device according to any one of claims 1-3, characterized in that, The two battery cells electrically connected to the first electrical connector are arranged facing each other along the first direction.

14. The battery device according to claim 13, characterized in that, The battery cell has two electrode terminals, which are spaced apart along a third direction. The two first electrical connection portions of the first electrical connector are also spaced apart along the third direction. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

15. The battery device according to any one of claims 1-3, characterized in that, The battery cell assembly further includes two limiting beams spaced apart along the first direction. In the battery cell assembly, the battery cell is limited between the two limiting beams along the first direction, and a portion of the second electrical connection extends along the limiting beams away from the surface of the battery cell.

16. The battery device according to claim 15, characterized in that, The limiting beam has a first groove at one end along the second direction, the first groove passes through the limiting beam along the first direction, and the first electrical connection part passes through the first groove along the first direction.

17. The battery device according to any one of claims 1-3, characterized in that, The first electrical connection structure further includes an insulating layer disposed on the outer surface of the second electrical connection portion.

18. The battery device according to claim 17, characterized in that, The insulating layer is provided on a portion of the outer surface of the first electrical connection portion.

19. The battery device according to any one of claims 1-3, characterized in that, The housing structure includes a first part and a second part arranged along the second direction. The first battery module is disposed within the space formed by the first part and the second part. The second part has a plurality of second grooves spaced apart along the first direction and a protrusion disposed between two adjacent second grooves on the side facing the first part. At least a portion of a plurality of battery cell assemblies of the first battery module are respectively disposed in the plurality of second grooves. The protrusion is inserted into the receiving space. The second part has a third groove on the side away from the first part at a position corresponding to the protrusion.

20. The battery device according to claim 19, characterized in that, The battery device further includes a second battery module, which includes a plurality of the battery cells. The second battery module is disposed within the housing structure and is located on the side of the first battery module away from the second part along the second direction.

21. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-20.

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