Battery device and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises at least one battery module, and the battery module comprises a battery monomer and a box. The box comprises a first wall, two second walls and two third walls. The two second walls are oppositely arranged along a first direction, and the two third walls are oppositely arranged along a second direction. The two ends of the third wall along the first direction are respectively connected to the two second walls. At least part of the battery monomer is arranged in a space formed by the first wall, the second wall and the third wall. The first wall and the battery monomer are distributed along a third direction. In the at least one battery module, a reinforcing structure is arranged at the connection between the second wall and the third wall, and the reinforcing structure is connected to the second wall and the third wall. The reinforcing structure is arranged at the connection between the second wall and the third wall, and the reinforcing structure is connected to the second wall and the third wall, so that the structural strength and rigidity of the box are improved, and the cracking risk of the box is effectively reduced.

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, a battery device includes a housing and battery cells disposed within the housing. The housing includes a first wall, two opposing second walls, and two opposing third walls, the second and third walls being connected, and at least a portion of the battery cells being disposed within the space formed by the first, second, and third walls.

[0004] In some cases, the junction between the second and third walls is a weak point in the enclosure. Under complex operating conditions, this weak point may crack, resulting in insufficient structural strength and making it difficult to meet usage requirements.

[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. Utility Model Content

[0006] In view of the above problems, this application provides a battery device and an electrical device that can reduce the risk of the casing cracking.

[0007] In a first aspect, embodiments of this application provide a battery device, including at least one battery module, the battery module comprising:

[0008] Battery cell;

[0009] The housing includes a first wall, two second walls and two third walls. The two second walls are arranged opposite each other along a first direction, and the two third walls are arranged opposite each other along a second direction. The two ends of the third wall along the first direction are respectively connected to the two second walls. At least a portion of the battery cell is disposed within the space formed by the first wall, the second wall and the third wall. The first wall and the battery cell are distributed along the third direction.

[0010] In at least one battery module, a reinforcing structure is provided at the connection between the second wall and the third wall, and the reinforcing structure is connected to the second wall and the third wall;

[0011] Among them, the first direction, the second direction, and the third direction are all perpendicular to each other;

[0012] The reinforcing structure is located on the side of the third wall away from the battery cell along the second direction.

[0013] The battery device provided in this application embodiment has a reinforcing structure at the connection between the second and third walls, and the reinforcing structure is connected to the second and third walls. This improves the connection strength between the second and third walls, thereby improving the structural strength and rigidity of the housing. This effectively reduces the risk of cracking in the housing, specifically reducing the risk of cracking at the connection between the second and third walls, meeting the needs of complex operating conditions and long service life.

[0014] In some embodiments, the reinforcing structure is welded to the second wall and the third wall.

[0015] This design simplifies the connection between the reinforcing structure and the second and third walls, and simplifies the molding process of the battery device.

[0016] In some embodiments, the third wall is a limiting beam.

[0017] This design allows the third wall to resist the expansion of the battery cells. Furthermore, by reinforcing the connection between the second and third walls, the reinforcing structure effectively disperses stress when the third wall is subjected to the expansion force of the battery cells, reducing the risk of cracking of the second and third walls, thus enabling the third wall to effectively resist the expansion of the battery cells.

[0018] In some embodiments, the third wall has a first groove on the side away from the battery cell along the second direction, and at least part of the reinforcing structure is disposed in the first groove.

[0019] By placing at least a portion of the reinforcing structure within the first groove, the impact of the reinforcing structure on the dimensions of the housing along the second direction is reduced. This helps to ensure the external dimensions of the housing, thereby ensuring the energy density of the battery device to a certain extent.

[0020] In some embodiments, the second wall and the third wall are distributed along a first direction, the first groove extends to the second wall along the first direction, and the reinforcing structure is connected to the side of the second wall near the third wall along the first direction.

[0021] This design allows the reinforcing structure to be accommodated as much as possible within the first groove along the second direction, or even completely within the first groove without protruding beyond the third wall along the second direction. This ensures that the reinforcement structure's placement minimizes its impact on the dimensions of the casing along the second direction, thereby guaranteeing the energy density of the battery device to a certain extent.

[0022] In some embodiments, the reinforcing structure is connected to the bottom wall of the first groove.

[0023] This design helps to increase the connection area between the reinforcing structure and the third wall, thereby improving the connection strength between the reinforcing structure and the third wall, and further improving the connection strength between the second and third walls, reducing the risk of cracking of the enclosure.

[0024] In some embodiments, the reinforcing structure, the second wall, and the third wall are arranged at the junction of the second wall and the third wall to form a clearance space.

[0025] This arrangement ensures that the clearance space can accommodate the connection formed at the junction of the second and third walls. For example, in the case of welding between the second and third walls, the clearance space can accommodate the weld formed by the welding of the second and third walls. This improves the problem of interference with the reinforcing structure and facilitates the arrangement of the reinforcing structure.

[0026] In some embodiments, the reinforcing structure has a first through groove extending along the thickness direction, the thickness direction of the reinforcing structure intersects with a third direction, and the thickness direction of the reinforcing structure intersects with but is not perpendicular to the first and second directions.

[0027] This configuration, while effectively improving the connection strength between the second and third walls, helps reduce the mass of the reinforced structure and thus increases the energy density of the battery device.

[0028] In some embodiments, the reinforcing structure includes a plurality of support members spaced apart along a third direction, each support member having at least a portion disposed within a first groove, and each support member having its two ends connected to a second wall and a third wall, respectively.

[0029] This configuration, while effectively improving the connection strength between the second and third walls, helps reduce the mass of the reinforced structure and thus increases the energy density of the battery device.

[0030] In some embodiments, the dimension of the reinforcing structure along the thickness direction is greater than or equal to 2 mm, the thickness direction of the reinforcing structure intersects with a third direction, and the thickness direction of the reinforcing structure intersects with but is not perpendicular to the first and second directions.

[0031] This design ensures that the reinforcing structure has sufficient thickness, thereby effectively improving the connection strength between the second and third walls.

[0032] In some embodiments, the first groove extends through the opposite ends of the third wall in a first direction, and a reinforcing structure is provided between the two ends of the third wall and the two second walls.

[0033] This design helps to further improve the structural strength of the enclosure, thereby reducing the risk of cracking.

[0034] In some embodiments, the reinforcing structure has a second through groove extending along a third direction.

[0035] In some embodiments, the third wall is provided with a first groove;

[0036] Wherein, the height of the first groove along the third direction is ∈ [65mm, 150mm]; and / or, in the third direction, the height ratio of the first groove to the battery module is ∈ [1 / 3, 3 / 4].

[0037] This design allows the first groove to have a suitable size in the third direction, which helps to ensure the structural strength of the third wall and facilitates the installation of the third wall with devices outside the battery module through the first groove.

[0038] In some embodiments, the battery device includes a plurality of battery modules stacked along a third direction, wherein a first recess is fixedly connected to an adjacent battery module along a fourth wall in the third direction.

[0039] This design allows the fourth wall to be fixedly connected to adjacent battery modules, thus achieving a fixed connection between two adjacent battery modules. Furthermore, by having the fourth wall be a solid wall with the first groove along a third direction, the first groove provides operational space for the fixed connection process between the fourth wall and the adjacent battery module, facilitating the fixed connection between the two adjacent battery modules.

[0040] In some embodiments, the surface of the third wall away from the battery cell along the second direction is the outer surface of the housing.

[0041] This design eliminates the need for a panel on the side of the third wall away from the battery cell along the second direction, thus reducing the number of components used in the enclosure. On one hand, this reduces the weight of the battery pack, contributing to increased energy density. On the other hand, it reduces the number of connection points between components, thereby minimizing weak points and improving structural strength and rigidity, reducing the risk of cracking.

[0042] In some embodiments, the reinforcing structure includes a metal structure.

[0043] By adopting the above technical solutions, the reinforced structure has high structural strength, which helps to improve the structural strength and rigidity of the enclosure and reduce the risk of cracking.

[0044] In some embodiments, a first cavity is provided in the second wall; and / or, a second cavity is provided in the third wall.

[0045] By adopting the above technical solutions, the casing has strong structural strength and rigidity, which helps to achieve lightweight design of the battery module and resists the expansion of individual battery cells.

[0046] In some embodiments, the battery device includes a plurality of battery modules stacked along a third direction, wherein in at least two battery modules, a reinforcing structure is provided at the connection between the second wall and the third wall, and the reinforcing structure is connected to the second wall and the third wall.

[0047] This design helps to improve the structural strength and rigidity of the housing of at least two battery modules in the battery device, reducing the risk of cracking.

[0048] Secondly, embodiments of this application provide an electrical device, including a battery device.

[0049] The electrical device provided in this application embodiment, by employing the battery device mentioned above, enables the electrical device to meet the requirements of complex working conditions and long service life.

[0050] 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

[0051] 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.

[0052] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0053] Figure 2 Exploded views of a battery device provided in some embodiments of this application;

[0054] Figure 3 A perspective structural diagram of the battery module of a battery device provided in some embodiments of this application;

[0055] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0056] Figure 5 for Figure 3 The right view;

[0057] Figure 6 A perspective view of a battery device provided for other embodiments of this application.

[0058] The following are the labeling elements in the figure:

[0059] 1000 - Vehicle; 100 - Battery unit; 200 - Controller; 300 - Motor; 10 - Battery cell; 20 - Housing; 201 - First recess; 202 - Clearance space; 203 - First cavity; 21 - First part; 211 - Second wall; 212 - Third wall; 2121 - Fourth wall; 213 - First wall; 22 - Second part; 30 - Reinforcing structure; M - Battery module; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0060] 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.

[0061] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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. These battery devices can be either power batteries or energy storage batteries.

[0072] In related technologies, a battery device includes a housing and battery cells disposed within the housing. The housing includes a first wall, two opposing second walls, and two opposing third walls, the second and third walls being connected, and at least a portion of the battery cells being disposed within the space formed by the first, second, and third walls.

[0073] In some cases, the junction of the second and third walls is a weak point in the enclosure. Under complex operating conditions (such as high vibration loads or long-term use), cracks are inevitable at the junction of the second and third walls (weak points), resulting in insufficient structural strength of the enclosure and making it difficult to meet usage requirements.

[0074] As an example, the second and third walls are welded together, and the joint between the second and third walls forms the weld seam, creating a weak area in the enclosure. Under complex operating conditions (such as high vibration loads or long-term use), the weld seam between the second and third walls is prone to cracking.

[0075] Based on the above considerations, this application provides a battery device and an electrical device, in which a reinforcing structure is provided at the connection between the second and third walls, and the reinforcing structure is connected to the second and third walls. This improves the connection strength between the second and third walls, thereby improving the structural strength and rigidity of the housing. This effectively reduces the risk of cracking of the housing, specifically reducing the risk of cracking at the connection between the second and third walls, meeting the needs of complex working conditions and long service life.

[0076] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity.

[0077] In a battery device, when there are multiple battery cells, these cells can be connected in series, in parallel, or in a mixed configuration via a busbar. A mixed configuration refers to a configuration where multiple battery cells are connected in both series and parallel connections.

[0078] In a battery cell assembly, which comprises multiple battery cells, these cells are arranged in an array. Within the assembly, the cells are connected in series, parallel, or a combination of both via a busbar. A combination of both series and parallel connections refers to a configuration where multiple battery cells are connected in both series and parallel configurations.

[0079] In some embodiments, the battery device may be a battery module.

[0080] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0081] As an example, the battery cell assembly is directly housed within the casing.

[0082] As an example, individual battery cells are fixed to form a battery module, which is then housed in a housing.

[0083] In some embodiments, the housing may include a first portion and a second portion. The first portion and the second portion are fastened together to form a closed space inside the housing for housing the individual battery cells. Here, "closed" refers to covering or shutting off, and can be either sealed or unsealed.

[0084] As an example, the enclosure 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 to house the individual battery cells. The second part can be either the top cover or the bottom plate.

[0085] A battery module is an independent module formed by arranging and fixing multiple battery cells. For example, a battery module can be formed by bundling multiple battery cells together with cable ties. For example, the battery module can have end plate structures and side plate structures at both ends and both sides, respectively.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] The battery device provided in this application embodiment can also be used in electrical devices that use a battery device as a power source.

[0090] 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.

[0091] For ease of description, this application uses a vehicle as an example to illustrate the embodiments of the electrical device.

[0092] In some embodiments, please refer to Figure 1 , Figure 1This 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.

[0093] 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.

[0094] In some embodiments, please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 may include a housing 20 and a battery cell 10. The housing 20 is a structure with an internal space for accommodating the battery cell 10.

[0095] The housing 20 can adopt various structures. In some embodiments, the housing 20 may include a first part 21 and a second part 22, which overlap each other and together define the internal space of the housing 20, which is a closed space. Here, "closed" means covered or shut off; it can be sealed or unsealed. That is, the housing 20 can be a sealed structure or an unsealed structure. For example, Figure 2 As shown, both the first part 21 and the second part 22 can be hollow structures with an opening at one end. The open side of the first part 21 covers the open side of the second part 22, so that the first part 21 and the second part 22 together define the internal space of the box 20. Alternatively, the first part 21 can be a hollow structure with an opening at one end, and the second part 22 can be a plate-like structure. The second part 22 covers the open side of the first part 21, so that the first part 21 and the second part 22 together define the internal space of the box 20. The box 20 composed of the first part 21 and the second part 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0096] When the housing 20 includes a top cover, a frame, and a bottom plate, the first part 21 may include the frame and the bottom plate, and the second part 22 is the top cover. Alternatively, the first part 21 is the top cover, and the second part 22 includes the frame and the bottom plate.

[0097] In some embodiments, please combine Figure 1 and Figure 2 The housing 20 of the battery pack 100 can be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 can be at least a part of the floor of the vehicle 1000, or a portion of the housing 20 can be at least a part of the crossbeams and longitudinal beams of the vehicle 1000.

[0098] Please refer to the following: Figures 3 to 5 ,in, Figure 3 This is a perspective structural view of the battery module M of the battery device 100 provided in some embodiments of this application. Figure 4 for Figure 3 Enlarged view of point A in the middle. Figure 5 for Figure 3 The right view of the battery device 100 provided in this application embodiment includes at least one battery module M. The battery module M includes a battery cell 10 and a housing 20. At least a portion of the battery cell 10 is disposed within the housing 20. The housing 20 includes a first wall 213, two second walls 211, and two third walls 212. The two second walls 211 are arranged opposite each other along a first direction X, and the two third walls 212 are arranged opposite each other along a second direction Y. The two ends of the third walls 212 along the first direction X are respectively connected to the two second walls 211. At least a portion of the battery cell 10 is disposed within the space formed by the first wall 213, the second wall 211, and the third wall 212. The first wall 213 and the battery cell 10 are distributed along a third direction Z. In at least one battery module M, a reinforcing structure 30 is provided at the connection between the second wall 211 and the third wall 212. The reinforcing structure 30 is connected to the second wall 211 and the third wall 212. The first direction X and the second direction Y are perpendicular, the second direction Y is perpendicular to the third direction Z, and the first direction X is perpendicular to the third direction Z.

[0099] Among them, battery module M can be either a battery pack or a battery module.

[0100] The first wall 213, the second wall 211, and the third wall 212 are all solid walls of the box 20. The first wall 213 can be, but is not limited to, a panel structure. The second wall 211 can be a beam structure, such as... Figure 3 As shown; the second wall 211 can also be a panel structure. The third wall 212 can be a beam structure, such as... Figure 3 As shown; it can also be a panel structure. As an example, such as... Figure 3 As shown, both the second wall 211 and the third wall 212 are beam structures, and both the second wall 211 and the third wall 212 are made of extruded aluminum profiles.

[0101] It should be noted that the second wall 211 and the third wall 212 are connected separately by welding or other methods. Specifically, the first wall 213, the second wall 211, and the third wall 212 are connected in pairs; that is, the first wall 213 and the second wall 211 are connected separately by welding or other methods, the first wall 213 and the third wall 212 are connected separately by welding or other methods, and the second wall 211 and the third wall 212 are connected separately by welding or other methods. Alternatively, the first wall 213 and the second wall 211 are integrally formed, and the first wall 213 and the third wall 212 are connected separately by welding or other methods. Or, the first wall 213 and the third wall 212 are connected separately by welding or other methods, and the first wall 213 and the second wall 211 are integrally formed but connected separately by welding or other methods.

[0102] The first wall 213, the second wall 211 and the third wall 212 can constitute the first part 21.

[0103] The first direction X, the second direction Y, and the third direction Z are three directions that are roughly perpendicular to each other. As an example, the first direction X is the width direction of the battery module M, the second direction Y is the length direction of the battery module M, and the third direction Z is the height direction of the battery module M.

[0104] The reinforcing structure 30 refers to a structure used to strengthen the connection between the second wall 211 and the third wall 212. Understandably, the reinforcing structure 30 is located at the connection between the second wall 211 and the third wall 212, connecting to both the second wall 211 and the third wall 212. The reinforcing structure 30 can be fixedly connected to the second wall 211 by welding, bolting, riveting, or similar methods, and the reinforcing structure 30 can also be fixedly connected to the third wall 212 by welding, bolting, riveting, or similar methods.

[0105] Understandably, in the two third walls 212, each third wall 212 is connected to the two second walls 211 at both ends along the first direction X. Each of the two third walls 212 has a reinforcing structure 30 at both ends along the first direction X, and each reinforcing structure 30 connects the second wall 211 and the third wall 212 at its location. That is, in the two third walls 212, each end of the third wall 212 along the first direction X is connected to the corresponding end of the second wall 211 by a reinforcing structure 30. Alternatively, in one of the third walls 212, each end of the third wall 212 along the first direction X has a reinforcing structure 30, and each reinforcing structure 30 connects the second wall 211 and the third wall 212 at its location. Alternatively, in at least one of the third walls 212, one end of the third wall 212 along the first direction X is connected to the corresponding second wall 211 by a reinforcing structure 30.

[0106] The battery device 100 provided in this embodiment of the application has a reinforcing structure 30 at the connection between the second wall 211 and the third wall 212, and the reinforcing structure 30 is connected to the second wall 211 and the third wall 212. This improves the connection strength between the second wall 211 and the third wall 212, thereby improving the structural strength and rigidity of the housing 20. This effectively reduces the risk of cracking in the housing 20, specifically reducing the risk of cracking at the connection between the second wall 211 and the third wall 212, improving the reliability of the housing 20, and meeting the requirements of complex working conditions and long service life.

[0107] Furthermore, by connecting the reinforcing structure 30 to the second wall 211 and the third wall 212, the reinforcing structure 30 can effectively disperse the vibration load under high vibration load, thereby improving the vibration performance of the housing 20, helping to extend the service life of the battery device 100, and meeting the usage requirements under high vibration load.

[0108] Furthermore, by reinforcing the connection between the structure 30 and the second wall 211 and the third wall 212, the connection strength between the second wall 211 and the third wall 212 is improved, thereby reducing the risk of insulation failure of the housing 20 and improving the reliability of the housing 20, which in turn improves the reliability of the battery device 100.

[0109] In some embodiments, please refer to the following: Figures 3 to 5 The reinforcing structure 30 is located on the side of the third wall 212 away from the battery cell 10 along the second direction Y.

[0110] This design ensures that the reinforcing structure 30 does not occupy the internal space of the housing 20, which helps to improve the space utilization of the housing 20 and thus increase the energy density of the battery device 100.

[0111] In some embodiments, the reinforcing structure 30 is welded to the second wall 211 and the third wall 212.

[0112] Understandably, the reinforcing structure 30 is welded to the second wall 211, and the reinforcing structure 30 is also welded to the third wall 212. The reinforcing structure 30 can be welded to the second wall 211 using spot welding, argon arc welding, or other welding methods, and the reinforcing structure 30 can be welded to the third wall 212 using spot welding, argon arc welding, or other welding methods.

[0113] This design simplifies the connection between the reinforcing structure 30 and the second wall 211 and the third wall 212, and simplifies the molding process of the battery device 100.

[0114] In some embodiments, please refer to the following: Figures 3 to 5 The third wall 212 is a limiting beam. That is, the third wall 212 is a beam structure.

[0115] Based on this, the third wall 212 can be used to resist the expansion of the battery cell 10. Specifically, the third wall 212 is used to resist the expansion of the battery cell 10 along the second direction Y.

[0116] This configuration allows the third wall 212 to resist the expansion of the battery cell 10. Furthermore, by connecting the reinforcing structure 30 to the second wall 211 and the third wall 212, the reinforcing structure 30 can effectively disperse stress when the third wall 212 is subjected to the expansion force of the battery cell 10, reducing the risk of cracking of the second wall 211 and the third wall 212, thereby enabling the third wall 212 to effectively resist the expansion of the battery cell 10.

[0117] In some embodiments, the surface area of ​​the battery cell 10 along the second direction Y is the largest surface area of ​​the battery cell 10, which is the large surface of the battery cell 10. This configuration allows the third wall 212 to effectively resist the expansion of the battery cell 10.

[0118] In some embodiments, please refer to the following: Figures 3 to 5 The third wall 212 has a first groove 201 on the side away from the battery cell 10 along the second direction Y, and at least a portion of the reinforcing structure 30 is disposed in the first groove 201.

[0119] The first groove 201 is a groove structure formed by the third wall 212 being recessed along the second direction Y on the side away from the battery cell 10.

[0120] By having at least a portion of the reinforcing structure 30 disposed within the first groove 201, the impact of the reinforcing structure 30 on the dimensions of the housing 20 along the second direction Y is reduced. This helps to ensure the external dimensions of the housing 20, thereby ensuring the energy density of the battery device 100 to a certain extent.

[0121] In some embodiments, please refer to the following: Figures 3 to 5The second wall 211 and the third wall 212 are distributed along the first direction X, the first groove 201 extends along the first direction X to the second wall 211, and the reinforcing structure 30 is connected to the side of the second wall 211 along the first direction X near the third wall 212.

[0122] As an example, such as Figure 3 As shown, in the first direction X, the third wall 212 is disposed between the two second walls 211.

[0123] Understandably, the first groove 201 extends through the opposite ends of the third wall 212 along the first direction X, so that the first groove 201 extends along the first direction X to the two second walls 211, as shown below. Figures 3 to 5 As shown. Alternatively, the first groove 201 extends through one end of the third wall 212 along the first direction X, so that the first groove 201 extends along the first direction X to one of the second walls 211. That is, the first groove 201 has a slot at least one end along the first direction X, and at least one second wall 211 is disposed opposite to the first groove 201 along the first direction X through the slot.

[0124] This arrangement allows the reinforcing structure 30 to be accommodated as much as possible within the first groove 201 along the second direction Y, or even completely within the first groove 201 along the second direction Y, without extending beyond the third wall 212 along the second direction Y. This ensures that the arrangement of the reinforcing structure 30 has as little impact as possible on the dimensions of the housing 20 along the second direction Y, thereby guaranteeing the energy density of the battery device 100 to a certain extent.

[0125] Furthermore, it helps to increase the connection area between the reinforcing structure 30 and the second wall 211, thereby improving the connection strength between the reinforcing structure 30 and the second wall 211, and further improving the connection strength between the second wall 211 and the third wall 212, reducing the risk of cracking of the housing 20. Also, in the case of welding the reinforcing structure 30 and the second wall 211, it facilitates welding and helps to increase the weld size of the reinforcing structure 30 and the second wall 211, thus enhancing the connection strength between the second wall 211 and the third wall 212.

[0126] In other embodiments, the reinforcing structure 30 may be connected to one end of the second wall 211 along the second direction Y.

[0127] In some embodiments, please refer to the following: Figures 3 to 5 The reinforcing structure 30 is connected to the bottom wall of the first groove 201.

[0128] The bottom wall of the first groove 201 is the groove wall of the first groove 201 along the second direction Y.

[0129] This arrangement helps to increase the connection area between the reinforcing structure 30 and the third wall 212, thereby improving the connection strength between the reinforcing structure 30 and the third wall 212, and further improving the connection strength between the second wall 211 and the third wall 212, reducing the risk of cracking of the housing 20. Furthermore, in the case of welding the reinforcing structure 30 and the third wall 212, it facilitates welding and helps to increase the weld size of the reinforcing structure 30 and the third wall 212, thus enhancing the connection strength between the second wall 211 and the third wall 212.

[0130] In other embodiments, the reinforcing structure 30 may also be connected to the groove wall of the first groove 201 along the third direction Z.

[0131] By adopting the above technical solution, with the reinforcing structure 30 housed within the first groove 201, and one end of the reinforcing structure 30 connected to the third wall 212 and the other end connected to the second wall 211, the structure of the reinforcing structure 30 is very simple, and the arrangement process of the reinforcing structure 30 is also very simple. Therefore, the manufacturing difficulty and cost of the housing 20 are reduced.

[0132] In some embodiments, please refer to the following: Figure 3 and Figure 4 The reinforced structure 30, the second wall 211 and the third wall 212 are arranged at the connection of the second wall 211 and the third wall 212 to form a clearance space 202.

[0133] Understandably, the connection between the second wall 211 and the third wall 212 is spaced apart from the reinforcing structure 30, and the space formed by the connection between the second wall 211 and the third wall 212 and the reinforcing structure 30 is a clearance space 202.

[0134] This arrangement allows the clearance space 202 to accommodate the connection formed at the junction of the second wall 211 and the third wall 212. For example, in the case of welding the second wall 211 and the third wall 212, the clearance space 202 can accommodate the weld formed by the welding of the second wall 211 and the third wall 212. In this way, the problem of interference with the reinforcing structure 30 is improved, and the arrangement of the reinforcing structure 30 is facilitated.

[0135] Specifically, the cross-section of the clearance space 202 perpendicular to the third direction Z is roughly triangular. This improves the connection strength between the second wall 211 and the third wall 212.

[0136] In some embodiments, the reinforcing structure 30 has a first through groove extending through its thickness direction. The thickness direction of the reinforcing structure 30 intersects with a third direction Z, intersects with a first direction X but is not perpendicular to it, and intersects with a second direction Y but is not perpendicular to it.

[0137] Understandably, the first through groove extends through the reinforcing structure 30 along its thickness direction.

[0138] This configuration, while effectively improving the connection strength between the second wall 211 and the third wall 212, also helps to reduce the mass of the reinforcing structure 30 and improve the energy density of the battery device 100.

[0139] In some embodiments, the reinforcing structure 30 includes a plurality of supports spaced apart along a third direction Z. At least a portion of each support is disposed within a first groove 201, and both ends of each support are connected to a second wall 211 and a third wall 212, respectively.

[0140] The support member is one of the components of the reinforcing structure 30. The support member is generally strip-shaped.

[0141] This configuration, while effectively improving the connection strength between the second wall 211 and the third wall 212, also helps to reduce the mass of the reinforcing structure 30 and improve the energy density of the battery device 100.

[0142] In some embodiments, the dimension of the reinforcing structure 30 along the thickness direction is greater than or equal to 2 mm. The thickness direction of the reinforcing structure 30 intersects the third direction Z, intersects the first direction X but is not perpendicular to it, and intersects the second direction Y but is not perpendicular to it.

[0143] The thickness of the reinforcing structure 30 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.3mm, 4.6mm, 4.8mm, 4.9mm, 5mm, 5.2mm, 5.8mm, etc.

[0144] This design ensures that the reinforcing structure 30 has sufficient thickness, thereby enabling the reinforcing structure 30 to effectively improve the connection strength between the second wall 211 and the third wall 212.

[0145] It should be further clarified that the intersection of the thickness direction of the reinforcing structure 30 and the third direction Z means that the thickness direction of the reinforcing structure 30 and the third direction Z can form an angle greater than 0° and less than 180°, that is, the third direction Z and the thickness direction of the reinforcing structure 30 are not parallel. The third direction Z and the thickness direction of the reinforcing structure 30 can be perpendicular to each other or not perpendicular. The thickness direction of the reinforcing structure 30 and the third direction Z can be directions intersecting on the same plane or directions on skew planes, and the projection of the thickness direction of the reinforcing structure 30 onto the plane containing the third direction Z can intersect with the thickness direction of the reinforcing structure 30.

[0146] Correspondingly, the fact that the thickness direction of the reinforcing structure 30 intersects but is not perpendicular to the first direction X means that the thickness direction of the reinforcing structure 30 and the first direction X can form an angle greater than 0° and less than 180° and are not perpendicular, that is, the first direction X and the thickness direction of the reinforcing structure 30 are neither parallel nor perpendicular. The same explanation applies to the fact that the thickness direction of the reinforcing structure 30 intersects but is not perpendicular to the second direction Y, and will not be repeated here.

[0147] In some embodiments, please refer to the following: Figures 3 to 5 The first groove 201 extends through the opposite ends of the third wall 212 along the first direction X, and a reinforcing structure 30 is provided between the two ends of the third wall 212 and the two second walls 211.

[0148] Understandably, the first groove 201 is a through groove that extends through the opposite ends of the third wall 212 along the first direction X.

[0149] Understandably, both ends of the third wall 212 along the first direction X are respectively connected to two second walls 211. Each end of the third wall 212 along the first direction X is provided with a reinforcing structure 30, each reinforcing structure 30 connecting the second wall 211 and the third wall 212 at its location, and at least a portion of each reinforcing structure 30 is accommodated within the first groove 201. That is, each end of the third wall 212 along the first direction X is connected to the corresponding end of the second wall 211 by a reinforcing structure 30, and at least a portion of each reinforcing structure 30 is accommodated within the first groove 201. It is also understandable that the connection points between the two ends of the third wall 212 along the first direction X and the two second walls 211 form corner positions, and a reinforcing structure 30 is provided at each corner position between the second wall 211 and the third wall 212.

[0150] This design helps to further improve the structural strength of the enclosure 20, thereby further reducing the risk of cracking of the enclosure 20.

[0151] In some embodiments, the reinforcing structure 30 has a second through groove extending along the third direction Z.

[0152] Understandably, the second through slot passes through the opposite ends of the reinforcing structure 30 in the third direction Z.

[0153] This configuration, while effectively improving the connection strength between the second wall 211 and the third wall 212, also helps to reduce the mass of the reinforcing structure 30 and improve the energy density of the battery device 100.

[0154] In some embodiments, please refer to the following: Figures 3 to 5 The third wall 212 is provided with a first groove 201.

[0155] In some possible designs, the height of the first groove 201 along the third direction Z is ∈ [65mm, 150mm].

[0156] Understandably, the height of the first groove 201 along the third direction Z can be 65mm, 70mm, 75mm, 78mm, 80mm, 82mm, 86mm, 89mm, 90mm, 92mm, 94mm, 98mm, 100mm, 103mm, 105mm, 108mm, 110mm, 115mm, 118mm, 12mm, 121mm, 125mm, 129mm, 130mm, 134mm, 136mm, 138mm, 140mm, 141mm, 143mm, 146mm, 148mm, 150mm, etc.

[0157] In some possible designs, on the third direction Z, the height ratio of the first groove 201 to the battery module M is ∈ [1 / 3, 3 / 4].

[0158] On the third direction Z, the height ratio of the first groove 201 to the battery module M can be 1 / 3, 1 / 2, 3 / 5, 2 / 3, 5 / 7, etc.

[0159] This design allows the first groove 201 to have a suitable size in the third direction Z. On the one hand, it helps to ensure the structural strength of the third wall 212. On the other hand, it facilitates the installation of the third wall 212 with devices outside the battery module M through the first groove 201.

[0160] In other embodiments, the third wall 212 may be provided with a plurality of first grooves 201, and the plurality of first grooves 201 may be spaced apart along the third direction Z.

[0161] In some embodiments, please refer to Figure 6 ,in, Figure 6This is a perspective view of a battery device 100 provided in some other embodiments of this application. The battery device 100 includes a plurality of battery modules M stacked along a third direction Z. In each battery module M, a first recess 201 is fixedly connected to an adjacent battery module M via a fourth wall 2121 along the third direction Z.

[0162] The fourth wall 2121 is a solid wall on the first wall 213, and the inner wall of the fourth wall 2121 along the third direction Z is the groove wall of the first groove 201.

[0163] This configuration allows the fourth wall 2121 to be fixedly connected to the adjacent battery module M, thus achieving a fixed connection between two adjacent battery modules M. Furthermore, by making the fourth wall 2121 a solid wall of the first groove 201 along the third direction Z, the first groove 201 provides operational space for the fixed connection between the fourth wall 2121 and the adjacent battery module M during the process of establishing the fixed connection, facilitating the fixed connection between the two adjacent battery modules M.

[0164] In some embodiments, please refer to the following: Figure 3 and Figure 4 The surface of the third wall 212 away from the battery cell 10 along the second direction Y is the outer surface of the housing 20.

[0165] This design eliminates the need for a panel on the side of the third wall 212 away from the battery cell 10 along the second direction Y, thus reducing the number of components used in the housing 20. On one hand, this reduces the weight of the battery device 100, helping to increase its energy density. On the other hand, it reduces the number of connection points between any two components of the housing 20, thereby reducing weak points in the housing 20, improving its structural strength and rigidity, and lowering the risk of cracking.

[0166] In some embodiments, the reinforcing structure 30 includes a metal structure.

[0167] The reinforcing structure 30 can be a metal structure made of a single material. Alternatively, the reinforcing structure 30 can be an alloy structure. Alternatively, there can be multiple reinforcing structures 30, at least one of which can be a metal structure made of a single material, and at least one of which can be an alloy structure.

[0168] When the reinforcing structure 30 is a single-material metal structure, the reinforcing structure 30 can be an aluminum structure, a steel structure, a copper structure, etc.

[0169] By adopting the above technical solution, the reinforced structure 30 has high structural strength, which helps to improve the structural strength and rigidity of the box 20 and reduce the risk of cracking of the box 20.

[0170] In some embodiments, please refer to the following: Figure 4 and Figure 5 The second wall 211 has a first cavity 203.

[0171] Preferably, the second wall 211 is provided with a plurality of spaced-apart first cavities 203.

[0172] Among them, the first cavity 203 refers to the hole structure on the second wall.

[0173] This design gives the second wall 211 strong structural strength and allows for a lightweight design.

[0174] In some embodiments, the third wall 212 is provided with a second cavity.

[0175] Preferably, the third wall 212 is provided with a plurality of second cavities spaced apart.

[0176] The second cavity refers to the hole structure within the third wall 212.

[0177] This design gives the third wall 212 strong structural strength and allows for a lightweight design of the second wall 211.

[0178] By adopting the above technical solutions, on the one hand, the housing 20 has strong structural strength and rigidity; on the other hand, it helps to achieve a lightweight design of the battery module M; and on the other hand, it helps to resist the expansion of the battery cell 10.

[0179] In some embodiments, please refer to Figure 6 The battery device 100 includes a plurality of battery modules M stacked in a third direction Z. Among them, in at least two battery modules M, a reinforcing structure 30 is provided at the connection between the second wall 211 and the third wall 212, and the reinforcing structure 30 is connected to the second wall 211 and the third wall 212.

[0180] Understandably, the battery device 100 has a multi-layer module structure.

[0181] This configuration helps to improve the structural strength and rigidity of the housing 20 of at least two battery modules M in the battery device 100, and reduces the risk of cracking.

[0182] Please see Figure 1 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.

[0183] The electrical device provided in this application embodiment, by employing the battery device 100 mentioned above, enables the electrical device to meet the needs of complex working conditions and long service life.

[0184] As one embodiment of this application, such as Figures 3 to 5 As shown, the battery device 100 includes at least one battery module M. The battery module M includes a housing 20 and battery cells 10 disposed within the housing 20. The housing 20 includes a first wall 213, two second walls 211, two third walls 212, and a plurality of reinforcing structures 30. The two second walls 211 are arranged opposite each other along a first direction X, and the two third walls 212 are arranged opposite each other along a second direction Y. Each third wall 212 is welded to the two second walls 211 at both ends along the first direction X. At least a portion of the battery cell 10 is disposed within the space formed by the first wall 213, the second wall 211, and the third wall 212. The first wall 213 and the battery cell 10 are distributed along a third direction Z. The third wall 212 is a beam structure. A first groove 201 is provided on the side of the third wall 212 away from the battery cell 10 along the second direction Y. The first groove 201 extends through the opposite ends of the third wall 212 along the first direction X. A reinforcing structure 30 is provided at the connection between the second wall 211 and the third wall 212. The reinforcing structure 30 is accommodated within the first groove 201, and its two ends are welded to the side of the second wall 211 facing the third wall 212 along the first direction X and the bottom of the first groove 201. The first direction X is perpendicular to the second direction Y, the second direction Y is perpendicular to the third direction Z, and the first direction X is perpendicular to the third direction Z.

[0185] 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 by, Includes at least one battery module, the battery module comprising: Battery cell; The housing includes a first wall, two second walls and two third walls. The two second walls are arranged opposite each other along a first direction, and the two third walls are arranged opposite each other along a second direction. The two ends of the third walls along the first direction are respectively connected to the two second walls. At least a portion of the battery cell is disposed within the space formed by the first wall, the second wall and the third wall. The first wall and the battery cell are distributed along the third direction. In at least one of the battery modules, a reinforcing structure is provided at the connection between the second wall and the third wall, and the reinforcing structure is connected to the second wall and the third wall; Wherein, the first direction, the second direction, and the third direction are all perpendicular to each other; The reinforcing structure is disposed on the side of the third wall away from the battery cell along the second direction.

2. The battery device according to claim 1, characterized in that, The reinforcing structure is welded to the second wall and the third wall.

3. The battery device according to claim 1, characterized in that, The third wall is a limiting beam.

4. The battery device according to any one of claims 1-3, characterized in that, The third wall has a first groove on the side away from the battery cell along the second direction, and at least a portion of the reinforcing structure is disposed in the first groove.

5. The battery device according to claim 4, characterized in that, The second wall and the third wall are distributed along the first direction, the first groove extends to the second wall along the first direction, and the reinforcing structure is connected to the side of the second wall near the third wall along the first direction.

6. The battery device according to claim 5, characterized in that, The reinforcing structure is connected to the bottom wall of the first groove.

7. The battery device according to claim 5, characterized in that, The reinforcing structure, the second wall, and the third wall form a clearance space at the junction of the second wall and the third wall.

8. The battery device according to claim 7, characterized in that, The reinforcing structure has a first through groove extending along its thickness direction. The thickness direction of the reinforcing structure intersects with the third direction. The thickness direction of the reinforcing structure intersects with the first direction and the second direction but is not perpendicular to them.

9. The battery device according to claim 7, characterized in that, The reinforcing structure includes a plurality of support members spaced apart along the third direction, at least a portion of each support member being disposed within the first groove, and both ends of each support member being connected to the second wall and the third wall, respectively.

10. The battery device according to claim 7, characterized in that, The dimension of the reinforcing structure along the thickness direction is greater than or equal to 2 mm. The thickness direction of the reinforcing structure intersects with the third direction. The thickness direction of the reinforcing structure intersects with the first direction and the second direction but is not perpendicular to them.

11. The battery device according to claim 5, characterized in that, The first groove extends through the opposite ends of the third wall along the first direction, and the reinforcing structure is provided between the two ends of the third wall and the two second walls.

12. The battery device according to claim 4, characterized in that, The reinforcing structure has a second through groove extending through the third direction.

13. The battery device according to claim 4, characterized in that, The third wall is provided with the first groove; Wherein, the height of the first groove along the third direction is ∈ [65mm, 150mm]; and / or, in the third direction, the height ratio of the first groove to the battery module is ∈ [1 / 3, 3 / 4].

14. The battery device according to claim 4, characterized in that, The battery device includes a plurality of battery modules stacked along the third direction, wherein the first groove is fixedly connected to the adjacent battery module along the fourth wall of the third direction.

15. The battery device according to any one of claims 1-3, characterized in that, The surface of the third wall away from the battery cell along the second direction is the outer surface of the housing.

16. The battery device according to any one of claims 1-3, characterized in that, The reinforcing structure includes a metal structure.

17. The battery device according to any one of claims 1-3, characterized in that, The second wall has a first cavity; and / or the third wall has a second cavity.

18. The battery device according to any one of claims 1-3, characterized in that, The battery device includes a plurality of battery modules stacked along the third direction, wherein at least two of the battery modules have a reinforcing structure at the connection between the second wall and the third wall, and the reinforcing structure is connected to the second wall and the third wall.

19. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-18.

Images