Battery device, vehicle and electric device

Abstract

The utility model is applicable to the technical field of power battery devices, and provides a battery device, a vehicle and a power utilization device.The battery device comprises a box body, and a first cavity is formed in the box body; the single battery is accommodated in the first cavity, one end, in the first direction, of the single battery is connected to the box body, and the other end, in the first direction, of the single battery is used for supporting the box body; the battery monomer comprises a shell, an electrode assembly, an electrode terminal and a first pressure relief structure, the electrode terminal and the first pressure relief structure are respectively arranged at two ends of the shell in a first direction, the electrode assembly is arranged in the shell, and the electrode assembly is connected with the electrode terminal; wherein one end, provided with the electrode terminal, of the single battery is used for supporting the box body; according to the battery device provided by the embodiment of the invention, the single battery provides a fixed foundation for the box cover of the box body, so that the bearing capacity of the box cover is improved; the first pressure relief structure is arranged on one side opposite to the box cover, so that high-temperature and high-pressure flue gas generated by thermal runaway of the battery monomers is not easy to directly impact the box cover.

Description

Technical Field

[0001] The present application belongs to the technical field of power battery devices, and in particular relates to a battery device, a vehicle, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In current battery devices, the strength of the top plate of the battery device case is generally low, resulting in poor load-bearing performance of the top of the battery device case and poor protection performance for the battery device. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, a vehicle and an electrical device, which can alleviate the problem that the box cover of the current battery device has low strength and poor load-bearing performance.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising: a box body, a first cavity being provided therein; a battery cell being accommodated in the first cavity, one end of the battery cell being connected to the box body in a first direction, and the other end of the battery cell in the first direction being used to support the box body; the battery cell comprises a shell, an electrode assembly, electrode terminals and a first pressure relief structure, the electrode terminals and the first pressure relief structure being respectively provided at the two ends of the shell body in the first direction, the electrode assembly being provided in the shell body, and the electrode assembly being connected to the electrode terminals; wherein, one end of the battery cell having the electrode terminal is used to support the box body.

[0006] In the technical solution of this embodiment, one end of the battery cell with the electrode terminal provides support for the box body to improve the bearing capacity of the box cover; the first pressure relief structure is arranged on the side opposite to the electrode terminal to prevent the high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell from directly impacting the box cover.

[0007] In some embodiments, the box body further includes a second cavity, the box body is provided with a position-avoiding hole connecting the first cavity and the second cavity, and the first pressure relief structure is arranged opposite to the position-avoiding hole in the first direction.

[0008] In the technical solution of this embodiment, a second cavity and a avoidance hole are provided in the box body, and the first pressure relief structure is opposite to the avoidance hole, so that the high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell can be discharged into the second cavity through the first pressure relief structure, thereby reducing the high-temperature and high-pressure flue gas remaining in the first cavity, improving the safety performance of the battery device, and reducing the risk of damage to other structures outside the box body caused by thermal runaway of the battery cell.

[0009] In some embodiments, the box body also includes a frame structure, a box cover, a bottom structure and a protective plate. The frame structure is arranged to pass through in the first direction. The box cover closes one end of the frame structure in the first direction. The bottom structure closes the other end of the frame structure in the first direction. The avoidance hole is arranged on the bottom structure. The box cover, the frame structure and the bottom structure form a first cavity; the protective plate is arranged on the side of the bottom structure away from the box cover to form a second cavity with the bottom structure.

[0010] The technical solution of this embodiment provides some specific structures of the box, forming a first cavity and a second cavity separated from each other through the bottom structure and the guard plate, so as to reduce the negative impact that the high-temperature and high-pressure flue gas discharged into the second cavity may have on the battery cells.

[0011] In some embodiments, the bottom structure includes a plate structure; the bottom structure is made of a metal material through a casting process, or the bottom structure includes a profile.

[0012] The technical solution of this embodiment provides some specific structures of the bottom structure, so that the bottom structure is made of metal material through a casting molding process or is a profile, so that the bottom structure can have higher strength, thereby being able to better and more stably provide support for the battery cell.

[0013] In some embodiments, the bottom structure includes a heat exchange assembly.

[0014] The technical solution of this embodiment provides other specific structures of the bottom structure, so that the bottom structure includes a heat exchange component, so that the heat exchange component can not only control the temperature of the battery device during normal use of the battery device, but also reduce the overall temperature of the battery device in the event of thermal runaway of the battery cell.

[0015] In some embodiments, a second pressure relief structure is provided on the box body, and the second pressure relief structure is used to connect the first cavity with the space outside the box body; the second cavity is connected to the first cavity at a position close to the second pressure relief structure to discharge the substance in the second cavity to the space outside the box body through the second pressure relief structure.

[0016] In the technical solution of this embodiment, a second pressure relief structure is provided so that the high-temperature and high-pressure flue gas in the second cavity can be discharged outside the box through the second pressure relief structure; at the same time, the high-temperature and high-pressure flue gas in the box can also be directly discharged outside the box through the second pressure relief structure to reduce the high-temperature and high-pressure flue gas remaining in the box.

[0017] In some embodiments, the battery device further includes a first support member, which is located between one end of the shell where the electrode terminal is provided and the box body in a first direction, one side of the first support member is connected to the shell, and the other side of the first support member is connected to the box body.

[0018] In the technical solution of this embodiment, a first support member is provided between the battery cell and the box body to support the box body through the first support member; at the same time, the battery cell is not easily in direct contact with the box body, thereby reducing the damage to the battery cell caused by expansion and friction between the box body and the battery cell.

[0019] In some embodiments, the first support member includes a first support portion and a first extension portion connected to the first support portion, the first support portion is connected to the shell and is staggered with the electrode terminal; the first extension portion is arranged on the side of the first support portion away from the battery cell, the first extension portion is connected to the box body, and the first extension portion is opposite to the electrode terminal and spaced apart.

[0020] In the technical solution of this embodiment, the first extension part is supported by the first supporting part so that the first extension part can provide support for the box body; the first extension part is spaced apart from the electrode terminal so that it is difficult for the first extension part to contact the electrode terminal, thereby reducing the risk of the first extension part rubbing or colliding with the electrode terminal and reducing possible damage to the electrode terminal.

[0021] In some embodiments, the shell includes a shell body and an end cover connected to the shell body, the end cover is arranged on the side of the shell body facing the box cover, the electrode terminal is arranged on the end cover, and the first pressure relief structure is arranged on the side of the shell body opposite to the end cover; the first support portion is supported by the end cover, and the first extension portion is spaced apart from the end cover.

[0022] The technical solution of this embodiment provides some specific structures of the battery cells, so that the first support part is abutted against the end cover, so that the battery cell can provide support for the first support part through the shell body and the end cover; the first extension part is spaced apart from the end cover to reduce the risk of the first extension part rubbing or colliding with the electrode terminal, thereby reducing possible damage to the electrode terminal.

[0023] In some embodiments, in the first direction, a projection of the first support portion on the end cap is staggered from a projection of the electrode terminal on the end cap.

[0024] In the technical solution of this embodiment, the first support portion and the electrode terminal are staggered to reduce friction and collision damage to the electrode terminal caused by the first support portion, thereby reducing the risk of damage to the electrode terminal and improving the stability of the battery device.

[0025] In some embodiments, in the first direction, a projection of the first support portion on a corresponding side wall of the box body at least partially overlaps with a projection of a side wall of the housing body on a corresponding side wall of the box body.

[0026] In the technical solution of this embodiment, at least a portion of the first support portion in the first direction is able to be opposite to the shell body, so that the first support portion can transfer part of the force it bears to the shell body, thereby enabling the shell body to better provide support for the first support portion, further improving the strength of the box.

[0027] In some embodiments, the first support member is a rigid insulating structural member.

[0028] In the technical solution of this embodiment, the first support member is a hard structural member, so that the first support member can better provide support for the box.

[0029] In some embodiments, the battery device further includes a second support member, one side of the second support member is connected to the first extension portion and / or the box body, and at least a portion of the other side of the second support member is connected to the electrode terminal.

[0030] In the technical solution of this embodiment, a second support member is provided between the first extension portion and the end cover, and the second support member provides support for the first extension portion and / or the box body, so that the first support member can better provide support for the box body, thereby better improving the strength of the box body.

[0031] In some embodiments, the second support member includes a second support portion and a second extension portion connected to the second support portion, one side of the second support portion is connected to the first extension portion and / or the box body, and the other side of the second support portion is connected to the shell and staggered with the electrode terminal; one side of the second extension portion is connected to the first extension portion and / or the box body, and the other side of the second extension portion is opposite to the electrode terminal and connected to the electrode terminal.

[0032] In the technical solution of this embodiment, the second support member includes a second supporting portion and a second extending portion. The second supporting portion provides support for the first extending portion to improve the supporting performance of the first extending portion on the box body; the second extending portion fills the space between the first extending portion and the electrode terminal to reduce the gap between the box body and the battery cell, thereby further improving the strength of the box body.

[0033] In some embodiments, at least a portion of the second support member is a rigid insulating structure or a flexible insulating structure.

[0034] The technical solution of this embodiment provides some structures of the second support members, so that the second support members can better provide support for the box body, or can reduce the risk of damage to the electrode terminals.

[0035] In some embodiments, the hardness of the second support member is less than or equal to the hardness of the first support member.

[0036] In the technical solution of this embodiment, since the second support member contacts the electrode terminal, the hardness of the second support member is less than or equal to that of the first support member, which can reduce the risk of the second support member damaging the electrode terminal.

[0037] In some embodiments, the tensile modulus of the first support member is greater than or equal to 30 GPa; and / or the tensile modulus of the second support member is greater than or equal to 30 GPa.

[0038] The technical solution of this embodiment provides some strength parameters and ranges of the first support member and / or the second support member, so that the first support member and / or the second support member have higher strength, thereby being able to better support the box.

[0039] In some embodiments, the second supporting portion is a rigid insulating structure, and the second extending portion is a rigid insulating structure or a flexible insulating structure.

[0040] In the technical solution of this embodiment, the second support part is made into a hard insulating structure, so that the second support part can better provide support for the first extension part, thereby better improving the strength of the box cover; the second extension part is made into a hard or flexible insulating structure, so that the second extension part can not only provide support for the first extension part, reduce the gap between the first extension part and the battery cell, but also reduce the risk of the second extension part causing damage to the electrode terminal.

[0041] In a second aspect, embodiments of the present application further provide a vehicle, comprising the battery device provided by some embodiments of the first aspect, wherein the box cover of the box body is used as at least a part of the floor structure of the vehicle.

[0042] In a third aspect, embodiments of the present application further provide an electrical device, including the battery device provided by some embodiments of the first aspect.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0046] Figure 2 Schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0047] Figure 3 A schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0048] Figure 4 This is a schematic diagram of the exploded structure of the box in some embodiments of the present application;

[0049] Figure 5 A schematic front view of a battery device according to some embodiments of the present application;

[0050] Figure 6 for Figure 5 Schematic cross-sectional view along line AA;

[0051] Figure 7 for Figure 6 A partial enlarged schematic diagram of point B in the middle;

[0052] Figure 8 for Figure 7 A partial enlarged schematic diagram of point C in the middle;

[0053] Figure 9 for Figure 7 A local enlarged schematic diagram of point D in the middle.

[0054] The meanings of the marks in the figure are:

[0055] 1000. Vehicle;

[0056] 100. Battery device;

[0057] 10. Box body; 101. First cavity; 11. Box cover; 12. Bottom structure; 121. Avoidance hole; 13. Guard plate; 131. Second cavity; 14. Frame structure; 15. Second pressure relief structure;

[0058] 20. Battery cell; 21. Electrode terminal; 22. First pressure relief structure; 23. Housing; 231. Housing body; 232. End cap; 24. Electrode assembly;

[0059] 30. First support member; 31. First support portion; 32. First extension portion;

[0060] 40. Second support member; 41. Second support portion; 42. Second extension portion;

[0061] 200, motor;

[0062] 300. Controller. DETAILED DESCRIPTION

[0063] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0065] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0066] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0067] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0068] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0069] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0070] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0071] Currently, market developments indicate that power battery applications are becoming increasingly widespread. Power battery systems are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of power battery systems continue to expand, market demand is also growing.

[0072] The case of a battery device usually includes a lower case and an upper case. Among them, the lower case is mainly used to carry and protect the battery cells, and the strength of the lower case is usually higher. Compared with the lower case, the upper case is mainly used to block the interference of the environment outside the case on the battery cells, so the upper case is usually a sheet metal part, a plastic part or other low-strength structural parts. In a battery device where the battery cells are placed in the forward direction, an exhaust space for thermal runaway needs to be reserved between the upper case and the battery cells, and an electrical gap needs to be reserved between the tabs and the upper case. At this time, it is difficult for the battery cells to provide support to the upper case, and the upper case can only provide support through the lower case. The overall strength of the upper case is low; because the connection parts of the upper and lower cases are usually located at the peripheral edges of the upper case, the strength of the middle part of the upper case is lower due to the lack of support.

[0073] Therefore, the upper case is more susceptible to deformation and other abnormalities during use of the battery assembly, resulting in poor protection of the battery cells. Forces acting on the upper case are typically transmitted to the lower case through the connection between the upper case's lateral edges and the lower case, leaving the middle portion of the upper case lacking support. This results in lower strength and greater susceptibility to deformation. This is particularly true in vehicles with the battery assembly as the floor, where the upper case supports passengers and cargo, which come into direct contact with it. This requires even higher strength for the upper case, which current sheet metal or plastic upper cases struggle to meet. Furthermore, the support provided by the lower case to the upper case struggles to meet the vehicle's requirements for upper case support performance.

[0074] To improve the strength of the upper box, the material of the upper box can be replaced with an alloy or reinforced with beams. However, such an arrangement would significantly increase the overall weight and thickness of the battery assembly. The primary purpose of using the battery assembly as a vehicle floor is to reduce vehicle weight and increase passenger compartment space. Installing an alloy upper box or reinforcing beams contradicts the original intention of using the battery assembly as a vehicle floor.

[0075] Currently, there are some structures in which the battery cells are inverted and installed on the upper box. In this type of structure, although the battery cells are fixed to the upper box to improve the strength of the upper box, the other end of the battery cells is suspended in the air, and the upper box is still supported by the lower box. The supporting performance of the upper box is still difficult to meet the vehicle's requirements for the supporting performance of the upper box.

[0076] Based on the above considerations, in order to alleviate the problem of low strength and poor load-bearing performance of the box cover of the current battery device box, an embodiment of the present application provides a battery device, in which one end of the battery cell is connected to the bottom structure of the box, and the other end of the battery cell provides support for the box cover of the box; at the same time, the pressure relief structure of the battery cell is arranged on the side of the battery cell facing the bottom structure.

[0077] In such a battery device, the battery cells arranged in the box body can all provide support for the box cover, greatly improving the strength of the box cover and making the supporting performance of various parts of the box cover more uniform, which makes it less likely for the middle part to have low strength. The pressure relief structure is set on the side of the battery cell facing the bottom structure, so that the pressure relief structure is away from the box cover, that is, away from the passenger compartment. In the event of thermal runaway of the battery cell, the high-temperature and high-pressure flue gas generated by the thermal runaway is unlikely to directly impact the box cover, thereby reducing the damage to passengers and objects caused by thermal runaway and improving the safety performance of the battery device.

[0078] The battery device disclosed in the embodiments of the present application can be used in various energy storage systems that use the battery device as a power source or use the battery device as an energy storage element. The power device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0079] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0080] refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 300 and a motor 200, and the controller 300 is used to control the battery device 100 to power the motor 200, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0081] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0082] refer to Figure 2 , Figure 2This is an exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 being housed within the housing 10. The housing 10 is used to provide a storage space for the battery cell 20, and the housing 10 can have a variety of structures. In some embodiments, the housing 10 can include an upper housing and a lower housing, the upper housing and the lower housing covering each other, and the upper and lower housings together define a storage space for accommodating the battery cell 20. The lower housing can be a hollow structure with one end open, and the upper housing can be a plate-like structure, with the upper housing covering the open side of the lower housing, so that the upper and lower housings together define a storage space; the upper and lower housings can also be hollow structures with one side open, with the open side of the upper housing covering the open side of the lower housing. Of course, the housing 10 formed by the upper and lower housings can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0083] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery device 100 may be housed within the housing 10. Of course, the battery device 100 may also be a module of the battery device 100, in which multiple battery cells 20 are first connected in series, in parallel, or in a hybrid connection, and then the multiple battery device 100 modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery device 100, and then housed within the housing 10. The battery device 100 may also include other structures, for example, the battery device 100 may further include a busbar component for electrically connecting the multiple battery cells 20.

[0084] Each battery cell 20 may be a secondary battery cell or a primary battery cell; it may also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0085] refer to Figure 3 , Figure 3 This is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 is the smallest unit that constitutes the battery device 100. As shown in the figure, the battery cell 20 includes a housing 23, an electrode assembly 24, and other functional components.

[0086] The shell 23 includes a shell body 231 and an end cover 232. The end cover 232 refers to a component that covers the opening of the shell body 231 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 232 can be adapted to the shape of the shell 23 to match the shell 23. Optionally, the end cover 232 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cover 232 is not easily deformed when squeezed or collided, so that the battery cell 20 can have a higher structural strength and improved safety performance. Functional components such as electrode terminals 21 can be provided on the end cover 232. The electrode terminal 21 can be used to electrically connect to the electrode assembly 24 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cover 232 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 232 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this embodiment of the present application does not impose any particular limitations thereon. In some embodiments, an insulating member can be disposed inside the end cap 232 to isolate the electrical connection components within the housing 23 from the end cap 232, thereby reducing the risk of short circuits. Exemplary materials include plastic, rubber, and the like.

[0087] The housing body 231 is a component that cooperates with the end cap 232 to form the internal environment of the battery cell 20. This internal environment can be used to accommodate the electrode assembly 24, electrolyte, and other components. The housing body 231 and the end cap 232 can be separate components. An opening can be provided in the housing body 231, and the end cap 232 is placed over the opening to form the housing 23 and the internal environment of the battery cell 20. Alternatively, the end cap 232 and the housing body 231 can be integrated. Specifically, the end cap 232 and the housing body 231 can form a common connection surface before other components are inserted into the housing. When the interior of the housing body 231 needs to be enclosed, the end cap 232 is placed over the housing body 231. The housing body 231 can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the housing body 231 can be determined based on the specific shape and size of the electrode assembly 24. The shell body 231 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0088] The electrode assembly 24 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 24 may be contained in the housing 23. The electrode assembly 24 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 24, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals 21 to form a current loop.

[0089] First, reference Figures 4 to 6 The present invention provides a battery device 100 including a housing 10 and a battery cell 20. A first cavity 101 is provided in the housing 10. The battery cell 20 is accommodated in the first cavity 101. One end of the battery cell 20 in a first direction is connected to the housing 10, and the other end of the battery cell 20 in the first direction is used to support the housing 10. The battery cell 20 includes a housing 23, an electrode assembly 24, an electrode terminal 21, and a first pressure relief structure 22. The electrode terminal 21 and the first pressure relief structure 22 are respectively provided at both ends of the housing 23 in the first direction. The electrode assembly 24 is provided in the housing 23 and is connected to the electrode terminal 21. The end of the battery cell 20 provided with the electrode terminal 21 is used to support the housing 10.

[0090] In the figure, the direction of the X-axis is the length direction of the battery device 100 , the direction of the Y-axis is the width direction of the battery device 100 , and the direction of the Z-axis is the height direction of the battery device 100 .

[0091] The box body 10 refers to the structure in the battery device 100 for providing a storage space for the battery cell 20; a first cavity 101 is provided in the box body 10. The first cavity 101 refers to the space in the box body 10 for accommodating the battery cell 20 or other structures. The first cavity 101 can be a rectangular space, or a prismatic, cylindrical or other shaped space.

[0092] The battery cell 20 is accommodated in the first cavity 101. The number of battery cells 20 can be one or two or more. When the number of battery cells 20 is two or more, multiple battery cells 20 can be arranged in an array along the length direction X and / or width direction Y of the box body 10.

[0093] The battery cell 20 is connected to the box body 10 at one end in the first direction, that is, the side of the box body 10 connected to the battery cell 20 can carry the battery cell 20 and provide support for the battery cell 20. The battery cell 20 can be directly connected to the box body 10 or indirectly connected to the box body 10 through an intermediate structure; the battery cell 20 can be fixedly connected to the box body 10 by welding, bonding or other means, or can be detachably connected to the box body 10 by screwing, snapping or other means.

[0094] The other end of the battery cell 20 in the first direction is used to provide support for the corresponding side wall of the box body 10; the battery cell 20 can directly abut the corresponding side wall of the box body 10 to provide support for the box body 10, or an intermediate structure can be set between the battery cell 20 and the box body 10 so that the battery cell 20 can provide support for the intermediate structure and indirectly provide support for the box body 10 through the intermediate structure; according to the arrangement of the battery cell 20 and the orientation in the first direction, the corresponding side wall of the box body 10 can be the top plate or bottom plate of the box body 10, or it can be the side structure of the box body 10.

[0095] For example, the battery device 100 generally includes a plurality of battery cells 20, and the plurality of battery cells 20 are arranged in an array along the length direction X and the width direction Y of the battery device 100, and each battery cell 20 can provide support for the box body 10; at this time, each position relative to the box body 10 and the battery cell 20 can be supported, thereby greatly improving the strength of the corresponding side walls of the box body 10, and the plurality of battery cells 20 can also uniformly provide support for the corresponding side walls of the box body 10, so that the strength of each location of the corresponding side walls of the box body 10 can be more uniformly improved.

[0096] The electrode terminal 21 refers to a structure in the battery cell 20 for electrically connecting to the electrode assembly 24 and other external structures. The electrode terminal 21 is used to output or input electrical energy from the battery cell 20 .

[0097] The first pressure relief structure 22 refers to a structure in the battery cell 20 for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The first pressure relief structure 22 may be an explosion-proof valve or other pressure relief structures.

[0098] The first pressure relief structure 22 is located on opposite sides of the shell 23 along the first direction and the electrode terminal 21, wherein the side of the battery cell 20 provided with the electrode terminal 21 is used to provide support for the box body 10, and the end of the battery cell 20 provided with the first pressure relief structure 22 is connected to the box body 10, that is, the two sides of the battery cell 20 along the first direction are respectively connected to the two sides of the box body 10 along the first direction, so that the battery cell 20 can provide support for the box body 10 along the first direction.

[0099] The first direction may be the height direction Z of the box body 10 , or the length direction X or width direction Y of the box body 10 , or other directions; for example, the first direction is the height direction Z of the box body 10 .

[0100] Since one end of the battery cell 20 provided with the electrode terminal 21 supports the case 10 , the electrode terminal 21 may be directly abutted against the case 10 , or an intermediate structure may be provided between the electrode terminal 21 and the case 10 .

[0101] For example, the first direction is the height direction Z of the box body 10. At this time, the battery cell 20 can provide support for the top plate of the box body 10, the electrode terminal 21 is located at the upper end of the battery cell 20, and the first pressure relief structure 22 is located at the lower end of the battery cell 20; because the top plate of the box body 10 is supported by the battery cell 20 and has a strong bearing capacity, the box body 10 can be used as the floor of the vehicle 1000 at this time, and the battery cell 20 is provided with one end of the electrode terminal 21 facing the interior of the vehicle 1000; in the case of thermal runaway of the battery cell 20, this setting can make the high-temperature and high-pressure flue gas generated by the battery cell 20 first spray to the bottom of the box body 10, so as to reduce the impact of the high-temperature and high-pressure flue gas on the top plate of the box body 10, thereby protecting the top plate of the box body 10 and reducing the damage that the high-temperature and high-pressure flue gas may cause to other structures of the vehicle 1000 and the interior of the vehicle 1000.

[0102] In this embodiment, the battery cell 20 provides a fixed foundation for the box body 10 to improve the load-bearing capacity of the box body 10. When the box body 10 serves as the floor of the vehicle 1000, this arrangement enables the box body 10 to better provide support for the occupants and items in the passenger compartment of the vehicle 1000. The first pressure relief structure 22 is arranged on the side opposite to the electrode terminal 21. When the box cover 11 serves as the floor of the vehicle 1000, this arrangement can reduce the damage that may be caused to the occupants and items in the passenger compartment of the vehicle 1000 by thermal runaway of the battery cell 20.

[0103] refer to Figures 5 to 9 In some embodiments, the box body 10 further includes a second cavity 131 , the box body 10 is provided with a position-avoiding hole 121 connecting the first cavity 101 and the second cavity 131 , and the first pressure relief structure 22 is arranged opposite to the position-avoiding hole 121 in the first direction.

[0104] The second cavity 131 refers to the space in the box body 10 for accommodating high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell 20; the second cavity 131 can be a rectangular space, a cylindrical space or a space of other shapes, and the shape of the second cavity 131 can also be set according to the shape of the box body 10; the second cavity 131 can be surrounded by some structural parts of the box body 10, and the first cavity 101 and the second cavity 131 are separated by some structural parts of the box body 10 to reduce the damage of the high-temperature and high-pressure flue gas in the second cavity 131 to the battery cell 20.

[0105] The avoidance hole 121 refers to a structure in the box body 10 for connecting the first cavity 101 and the second cavity 131. The avoidance hole 121 can be set on a structural member that separates the first cavity 101 and the second cavity 131; the avoidance hole 121 can be formed by opening a channel structure on the corresponding structural member, or by embedding a pipe on the corresponding structural member; the avoidance hole 121 can extend along a straight line, or can extend in a curved manner along a virtual reference straight line; the cross-sectional shape of the avoidance hole 121 along its radial direction can be circular, square or other shapes.

[0106] The avoidance hole 121 is opposite to the first pressure relief structure 22 in a first direction, so that high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell 20 can be discharged from the first pressure relief structure 22 to the avoidance hole 121 and then discharged to the second cavity 131 through the avoidance hole 121 .

[0107] Since the avoidance hole 121 is opposite to the first pressure relief structure 22 in the first direction, and the first pressure relief structure 22 and the electrode terminal 21 are arranged along the first direction, the second cavity 131 and the first cavity 101 can also be arranged along the first direction.

[0108] There may be one, two or more avoidance holes 121 . One avoidance hole 121 may be opposite to only one first pressure relief structure 22 , or may be opposite to two or more first pressure relief structures 22 .

[0109] It can be understood that when the bottom structure 12 includes a liquid cooling pipeline or other structures, the avoidance hole 121 can avoid the liquid cooling pipeline or other structures to reduce interference and damage to the liquid cooling pipeline or other structures.

[0110] In this embodiment, a second cavity 131 and an avoidance hole 121 are provided in the box body 10, and the first pressure relief structure 22 is opposite to the avoidance hole 121, so that the high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell 20 can be discharged into the second cavity 131 through the first pressure relief structure 22, thereby reducing the high-temperature and high-pressure flue gas remaining in the first cavity 101, improving the safety performance of the battery device 100, and reducing the risk of thermal runaway of the battery cell 20 causing damage to other structures outside the box body 10; when the box body 10 is used as the floor of the vehicle 1000, this arrangement also reduces the risk of thermal runaway of the battery cell 20 causing damage to occupants and items in the passenger compartment of the vehicle 1000.

[0111] refer to Figures 4 to 7 In some embodiments, the box body 10 further includes a frame structure 14, a box cover 11, a bottom structure 12 and a guard plate 13. The frame structure 14 is arranged to pass through in the first direction. The box cover 11 closes one end of the frame structure 14 in the first direction. The bottom structure 12 closes the other end of the frame structure 14 in the first direction. The avoidance hole 121 is provided on the bottom structure. The box cover 11, the frame structure 14 and the bottom structure 12 form a first cavity 101; the guard plate 13 is provided on the side of the bottom structure 12 away from the box cover 11 to form a second cavity 131 with the bottom structure 12.

[0112] The box cover 11 refers to a partial structure of the box body 10. The box cover 11 can be a plate-like structure, a box-like structure or other structures; the box cover 11 can include a plate body or other structural parts, and can also include a heat exchange structure (such as a cold plate, etc.) or other devices; the shape of the box cover 11 can be square, round or other shapes.

[0113] The bottom structure 12 refers to a partial structure of the box body 10. The bottom structure 12 is opposite to the box cover 11. The bottom structure 12 can be used to support the battery cells 20 or other structures in the box body 10. The bottom structure 12 can be a plate-like structure, or a box-like structure or other structure. The bottom structure 12 can include a plate or other structural parts, and can also include a heat exchange structure (such as a cold plate, etc.) or other devices. The shape of the bottom structure 12 can be square, round or other shapes.

[0114] The frame structure 14 refers to the side structure in the box body 10. The frame structure 14 may include a square or other shaped frame structure formed by connecting multiple side beams end to end in sequence; the frame structure 14 is arranged to be through-set in the first direction, that is, the frame structure 14 has two openings in the first direction, and the opposite sides of the frame structure 14 in the first direction are respectively connected to the box cover 11 and the bottom structure 12, that is, the box cover 11 and the bottom structure 12 respectively close the opposite ends of the frame structure 14 in the first direction. At this time, the box cover 11, the bottom structure 12 and the frame structure 14 enclose a first cavity 101 to accommodate the battery cell 20.

[0115] Because the box cover 11 and the bottom structure 12 respectively enclose opposite ends of the frame structure 14 in a first direction, the battery cells 20 also provide support for the box body 10 along the first direction. That is, the two ends of the battery cells 20 correspond to the box cover 11 and the bottom structure 12, respectively. For example, one end of the battery cell 20 provided with the first pressure relief structure 22 is connected to the bottom structure 12, which supports and supports the battery cell 20. The other end of the battery cell 20 provided with the electrode terminal 21 is connected to the box cover 11 to provide support for the box cover 11. In this case, the box cover 11 can serve as the floor of the vehicle 1000.

[0116] It can be understood that the frame structure 14 can be used as part of the upper box body, in which case the frame structure 14 and the box cover 11 can be regarded as the upper box body; the frame structure 14 can also be used as part of the lower box body, in which case the frame structure 14 and the bottom structure 12 can be regarded as the lower box body.

[0117] The guard plate 13 refers to a structure in the box body 10 that is mainly used to provide external protection. The guard plate 13 is arranged on the side of the bottom structure 12 away from the box cover 11, so that the guard plate 13 can protect the bottom structure 12; the guard plate 13 can only cover part of the bottom structure 12 to protect part of the bottom structure 12 in a targeted manner, and the guard plate 13 can also completely cover the entire bottom structure 12. In addition to the bottom structure 12, the guard plate 13 can also be bent toward the side of the box body 10 to cover part of the side structure of the box body 10 (such as the frame structure 14). At this time, the guard plate 13 can also be used to protect part of the side of the box body 10.

[0118] The guard plate 13 can be a square plate, a circular plate or a structure of other shapes; the guard plate 13 can be detachably connected to the bottom structure 12 by screwing, snapping or other means, and the guard plate 13 can also be fixedly connected to the bottom structure 12 by welding, bonding or other means; the material of the guard plate 13 can include metal, plastic or other materials.

[0119] When the box cover 11 is used as the floor of the vehicle 1000, the bottom structure 12 faces the ground. At this time, the bottom structure 12 is easily damaged by flying gravel, road bumps, etc. during the movement of the vehicle 1000; therefore, a guard plate 13 is provided on the side of the bottom structure 12 away from the box cover 11 to protect the bottom structure 12 through the guard plate 13.

[0120] The second cavity 131 refers to the space formed between the bottom structure 12 and the guard plate 13. At this time, the bottom structure 12 can separate the first cavity 101 and the second cavity 131; the second cavity 131 can be a complete space, or it can be divided into multiple pipe-shaped spaces by structural parts.

[0121] The avoidance hole 121 is provided on the bottom structure 12. In the event of thermal runaway of the battery cell 20 in the first cavity 101, the high-temperature and high-pressure flue gas generated by the battery cell 20 can be discharged to the second cavity 131 through the avoidance hole 121, thereby reducing the high-temperature and high-pressure flue gas in the first cavity 101 and reducing the negative impact of the high-temperature and high-pressure flue gas on the battery cell 20.

[0122] This embodiment provides some specific structures of the bottom structure 12, and forms a first cavity 101 and a second cavity 131 separated from each other through the bottom structure 12 and the guard plate 13, so as to reduce the negative impact that the high-temperature and high-pressure flue gas discharged into the second cavity 131 may have on the battery cell 20.

[0123] In some embodiments, the bottom structure 12 includes a plate structure; the bottom structure 12 is made of a metal material through a casting process, or the bottom structure 12 includes a profile.

[0124] The bottom structure 12 may include a plate structure, which may be a flat plate structure or a bent plate structure; the shape of the plate structure may be square, circular or other shapes, and the shape of the plate structure may also be set according to the shape of the box body 10; the plate structure may be fixedly connected to the frame structure 14 by welding, bonding or other means, or may be detachably connected to the frame structure 14 by screwing, riveting or other means.

[0125] The bottom structure 12 can be made of metal material through a casting molding process. The casting molding process is a processing technology that melts metal material or non-metallic material and then casts it into shape. The bottom structure 12 is made of metal material through a casting molding process to improve the strength of the bottom structure 12 by adjusting the processing technology.

[0126] The bottom structure 12 may also include a profile. A profile refers to a structure formed by plastic processing of metal and having a certain cross-sectional shape and size. The cross-section of the profile may be a solid structure or a hollow structure. The bottom plate may include one profile or multiple profiles. Depending on the shape of the cross-section of the profile, the bottom structure 12 usually has good strength and energy absorption performance, so as to provide support for the battery cell 20.

[0127] When the bottom structure 12 is made of metal material through a casting process or is a profile, the material of the bottom structure 12 may include iron, iron-carbon alloy, aluminum or other metal materials.

[0128] In addition to the plate structure, the bottom structure 12 may also include other structures, such as a liquid cooling structure.

[0129] This embodiment provides some specific structures of the bottom structure 12 , so that the bottom structure 12 is made of metal material through a casting process or is a profile, so that the bottom structure 12 can have higher strength, thereby being able to better and more stably support the battery cell 20 .

[0130] refer to Figure 7 In some embodiments, the bottom structure 12 includes a heat exchange component.

[0131] The heat exchange component refers to the structure in the battery device 100 used to control the temperature of the first cavity 101 and the battery cell 20. The heat exchange component may include a liquid cooling structure, an air cooling structure or other structures for controlling temperature; the bottom structure 12 may only include the heat exchange component. In this case, the heat exchange component is not only used to control the temperature of the first cavity 101 and the battery cell 20, but also used to support the battery cell 20 or other structures; the bottom structure 12 may only include the heat exchange component, or the bottom structure 12 may also include other structures.

[0132] The heat exchange assembly can be directly connected to the frame structure 14 or indirectly connected to the frame structure 14 through an intermediate structure.

[0133] When the bottom structure 12 includes a heat exchange component, the avoidance hole 121 can pass through the heat exchange component; the avoidance hole 121 can be formed by embedding a pipeline in the heat exchange component and forming the avoidance hole 121 in the pipeline, or a channel structure can be opened on the structural parts in the heat exchange component to form the avoidance hole 121; the avoidance hole 121 can avoid the liquid cooling pipeline or other structures to reduce interference and damage to the liquid cooling pipeline or other structures.

[0134] In the event of thermal runaway of the battery cell 20, the high-temperature and high-pressure flue gas generated by the thermal runaway can be discharged into the avoidance hole 121. Since the avoidance hole 121 passes through the heat exchange component, the high-temperature and high-pressure flue gas discharged into the avoidance hole 121 can be heat-exchanged with the heat exchange component in time and processed and cooled by the heat exchange component, thereby reducing the damage that the high-temperature and high-pressure flue gas may cause to other structures of the battery device 100 or other external structures, and improving the safety performance of the battery device 100.

[0135] This embodiment provides other specific structures of the bottom structure 12, so that the bottom structure 12 includes a heat exchange component, so that the heat exchange component can not only control the temperature of the battery device 100 during normal use of the battery device 100, but also reduce the overall temperature of the battery device 100 in the event of thermal runaway of the battery cell 20; the avoidance hole 121 is arranged on one side of the heat exchange component or in the heat exchange component, so that the heat exchange component can also be used to reduce the temperature of high-temperature and high-pressure flue gas, thereby better reducing the risk of damage to occupants and items in the passenger compartment of the vehicle 1000 caused by thermal runaway of the battery cell 20.

[0136] refer to Figure 6 、 Figure 7 In some embodiments, a second pressure relief structure 15 is provided on the box body 10, and the second pressure relief structure 15 is used to connect the first cavity 101 with the space outside the box body 10; the second cavity 131 is connected with the first cavity 101 at a position close to the second pressure relief structure 15, so as to discharge the substance in the second cavity 131 to the space outside the box body 10 through the second pressure relief structure 15.

[0137] The second pressure relief structure 15 refers to a structure in the battery device 100 for releasing internal pressure when the internal pressure or temperature of the first cavity 101 reaches a threshold value. The second pressure relief structure 15 can be an explosion-proof valve or other pressure relief structure, so one end of the second pressure relief structure 15 faces the first cavity 101, and the other end of the second pressure relief structure 15 can face the space outside the box body 10, so that the second pressure relief structure 15 can discharge the air in the first cavity 101 to the space outside the box body 10 after the pressure or temperature in the first cavity 101 reaches a threshold value; the second pressure relief structure 15 is provided on the box body 10, and the second pressure relief structure 15 can be provided on the box cover 11, or on the bottom structure 12, or on the frame structure 14 or other structural parts; the second pressure relief structure 15 can be completely accommodated in the first cavity 101, or can be completely located outside the box body 10 and connected to the surface of the box body 10 facing the outside, or the second pressure relief structure 15 can be partially located in the first cavity 101, and the other part passes through the box body 10 and extends to the outside.

[0138] The substance discharged from the second cavity 131 to the outside of the box body 10 through the second pressure relief structure 15 may include gas, liquid, solid or a mixture. The substance mainly includes substances generated by thermal runaway of the battery cell 20, which may include high-temperature and high-pressure gas, debris from part of the internal structure of the battery cell 20, electrolyte or other substances.

[0139] The second cavity 131 is connected to the first cavity 101 at a position close to the second pressure relief structure 15, so that the material in the second cavity 131 can move to the vicinity of the second pressure relief structure 15 and be discharged to the space outside the box body 10 through the second pressure relief structure 15; the second cavity 131 can be connected to the first cavity 101 through a pipeline structure or other structures.

[0140] For example, when the second cavity 131 is formed between the bottom structure 12 and the guard plate 13 , a through hole can be opened on a side of the bottom structure 12 close to the second pressure relief structure 15 so that the second cavity 131 can communicate with the first cavity 101 .

[0141] For example, the second pressure relief structure 15 can be arranged on the frame structure 14 of the box body 10. At this time, a through hole can be provided on the side of the bottom structure 12 close to the frame structure 14 and close to the second pressure relief structure 15, so that the second cavity 131 can be connected with the first cavity 101; a beam body (such as an expansion beam, etc.) can be provided in the box body 10 to separate the through hole from the battery cell 20 through the beam body, so as to reduce the negative impact that the high-temperature and high-pressure flue gas discharged from the second cavity 131 may have on the battery cell 20.

[0142] It is understandable that a pipe can also be provided so that one end of the pipe is connected to the second cavity 131 and the other end of the pipe is directed toward the second pressure relief structure 15 to reduce the negative impact that the high-temperature and high-pressure flue gas discharged from the second cavity 131 may have on the battery cell 20.

[0143] In this embodiment, a second pressure relief structure 15 is provided so that the high-temperature and high-pressure flue gas in the second cavity 131 can be discharged outside the box body 10 through the second pressure relief structure 15; at the same time, the high-temperature and high-pressure flue gas in the box body 10 can also be directly discharged outside the box body 10 through the second pressure relief structure 15 to reduce the high-temperature and high-pressure flue gas remaining in the box body 10.

[0144] refer to Figure 7 、 Figure 8 In some embodiments, the battery device 100 further includes a first support member 30. In a first direction, the first support member 30 is located between one end of the shell 23 where the electrode terminal 21 is provided and the box body 10. One side of the first support member 30 is connected to the shell 23, and the other side of the first support member 30 is connected to the box body 10.

[0145] The first support member 30 refers to a structure in the battery device 100 that is arranged between the battery cell 20 and the box body 10. The first support member 30 is used to provide support for the corresponding side walls of the box body 10; the first support member 30 may include a solid columnar structure, or a hollow frame structure or other structure; the number of first support members 30 may be one, or two or more, and one first support member 30 may be connected to only one battery cell 20, that is, the first support member 30 and the battery cell 20 have a one-to-one correspondence. One first support member 30 may also be connected to multiple battery cells 20 at the same time; the material of the first support member 30 may include metal, plastic or other materials.

[0146] The first support member 30 is arranged between one end of the shell 23 having the electrode terminal 21 and the corresponding side wall of the box body 10, so that the shell 23 can provide support for the box body 10 through the first support member 30, while also reducing direct contact between the shell 23, the electrode terminal 21 and the box body 10, thereby reducing possible damage to the battery cell 20.

[0147] In a case where one end of the housing 23 provided with the electrode terminal 21 supports the case cover 11 , the first support member 30 is located between the case body 10 and the housing 23 .

[0148] One side of the first support member 30 is connected to the shell 23. The side of the first support member 30 connected to the shell 23 can be connected to the end cover 232 of the battery cell 20, or to the electrode terminal 21 of the battery cell 20, or to the connecting structure (such as a tab) between two adjacent battery cells 20; on the surface where the shell 23 contacts the first support member 30, the first support member 30 can only cover part of the surface, or can completely cover the surface.

[0149] The first support member 30 is connected to one side of the battery cell 20 and can be detachably connected to the shell 23 by screwing, snapping or other means, or can be fixedly connected to the shell 23 by welding, bonding or other means; for example, the first support member 30 is fixedly connected to the shell 23 by gluing.

[0150] The first support member 30 may also be merely in contact with and connected to the battery cell 20 , and pressed against the housing 23 by the pressure of the box body 10 , so as to fix the first support member 30 in the box body 10 .

[0151] The other side of the first support member 30 is connected to the box body 10. The side of the first support member 30 connected to the box body 10 can be fixedly connected to the box body 10 by welding, bonding or other means, or can be detachably connected to the box body 10 by screwing, clamping or other means.

[0152] The setting of the first support member 30 can also make it difficult for the electrode terminal 21 and the connecting structure between adjacent battery cells 20 (such as tabs, etc.) to directly contact the box body 10, so as to reduce the friction and collision of the box body 10 on the electrode terminal 21 or other structures of the battery cell 20, thereby protecting the battery cell 20, reducing damage to the battery cell 20, and improving the service life of the battery device 100.

[0153] When one end of the shell 23 with the electrode terminal 21 supports the box cover 11, the battery cell 20 can provide support to the box cover 11 through the first support member 30. When the box cover 11 is under pressure, part of the pressure borne by the box cover 11 can transfer the first support member 30 to the battery cell 20; because the battery cells 20 are usually tightly arranged inside the box body 10, and the edge of the box cover 11 is usually supported by the frame structure 14 or other structures, at this time, each battery cell 20 can provide support to each position of the box cover 11 through the first support member 30, thereby improving the overall strength of the box cover 11 and the supporting performance of the middle part of the box cover 11.

[0154] It can be understood that another part of the pressure borne by the box cover 11 can be directly transferred to the connected frame structure 14 and / or bottom structure 12.

[0155] In this embodiment, a first support member 30 is provided between the battery cell 20 and the case 10 to support the case 10 through the first support member 30; at the same time, the battery cell 20 is not easily in direct contact with the case 10, thereby reducing the damage to the battery cell 20 caused by expansion and friction between the case 10 and the battery cell 20.

[0156] refer to Figure 7 、 Figure 8 In some embodiments, the first support member 30 includes a first support portion 31 and a first extension portion 32 connected to the first support portion 31. The first support portion 31 is connected to the shell 23 and is staggered with the electrode terminal 21; the first extension portion 32 is provided on the side of the first support portion 31 away from the battery cell 20, the first extension portion 32 is connected to the box body 10, and the first extension portion 32 is opposite to and spaced from the electrode terminal 21.

[0157] The first support portion 31 refers to the partial structure of the first support member 30 that is connected to the shell 23. The first support portion 31 can be a solid columnar structure, or a hollow frame structure or other structure. Only one first support portion 31 can be set on a first support member 30, or two or more first support portions 31 can be set. One first support portion 31 can be connected to only one battery cell 20, that is, the first support portion 31 and the battery cell 20 have a one-to-one correspondence, or it can be connected to multiple battery cells 20 at the same time. The material of the first support portion 31 can include metal, plastic or other materials.

[0158] The first support portion 31 can be connected to the end cover 232 of the shell 23, or to the electrode terminal 21 of the battery cell 20, or to the connecting structure (such as a tab) between two adjacent battery cells 20; on the surface where the shell 23 contacts the first support portion 31, the first support portion 31 can only cover part of the surface, or can completely cover the surface.

[0159] The first support portion 31 can be detachably connected to the shell 23 by screwing, snapping or other means, or can be fixedly connected to the shell 23 by welding, bonding or other means. The first support portion 31 can also be connected only by contact with the shell 23; for example, the first support portion 31 is fixedly connected to the shell 23 by gluing.

[0160] The first extension portion 32 refers to the partial structure of the first support member 30 that is connected to the box body 10. The first extension portion 32 can be a solid plate structure, or a hollow plate structure or other structure; one first extension portion 32 can be connected to one or more first support portions 31, and one first support portion 31 can also be connected to one or more first extension portions 32; the first extension portion 32 can be integrally formed with the first support portion 31, or can be fixedly connected to the first support portion 31 by welding, bonding or other means, or can be detachably connected to the first support portion 31 by screwing, clamping or other means; the material of the first extension portion 32 can include metal, plastic or other materials, and the material of the first extension portion 32 can be the same as or different from the material of the first support portion 31.

[0161] The first extension portion 32 can extend in a plane perpendicular to the first direction in a direction away from the first support portion 31, so that the projected area of ​​the first extension portion 32 on the corresponding side of the box body 10 is larger than the projected area of ​​the first support portion 31 on the corresponding side of the box body 10, so that the first extension portion 32 can cover a larger area of ​​the box body 10, thereby enabling the first support member 30 to better provide support for various parts of the box body 10; the projected area of ​​the first extension portion 32 on the corresponding side of the box body 10 can also be close to the projected area of ​​the first support portion 31 on the corresponding side of the box body 10.

[0162] The first extension portion 32 is opposite to the electrode terminal 21 and is spaced apart. When the first direction is the height direction Z of the battery device 100, the first extension portion 32 is located above the electrode terminal 21, and there is a gap between the first extension portion 32 and the electrode terminal 21. At this time, the first extension portion 32 is also spaced apart from the connection structure (such as a tab, etc.) of the adjacent battery cell 20. This arrangement can reduce the friction and collision damage of the first extension portion 32 to the connection structure of the electrode terminal 21 and the adjacent battery cell 20, thereby reducing the interference of the first extension portion 32 on the input of electrical energy to the battery cell 20, and also reducing the interference of the first extension portion 32 on the transmission of electrical energy. At the same time, the gap can also serve as an electrical gap between the connection structure of the electrode terminal 21 and the adjacent battery cell 20 and the first extension portion 32, so as to reduce the interference of the first extension portion 32 on the connection structure of the electrode terminal 21 and the adjacent battery cell 20, and also reduce the risk of discharge and improve the safety performance of the battery device 100.

[0163] For example, in a case where the shell 23 is provided with an electrode terminal 21 at one end supporting the box cover 11, when the projected area of ​​the first extension portion 32 on the box cover 11 is larger than the projected area of ​​the first support portion 31 on the box cover 11, due to the gap between the first extension portion 32 and the electrode terminal 21, part of the first extension portion 32 extends beyond the first support portion 31 and is in a suspended state. At this time, part of the pressure of the box cover 11 is transmitted to the first support portion 31 through the first extension portion 32, and then transmitted to the shell 23 through the first support portion 31. Due to the gap between the first extension portion 32 and the electrode terminal 21, the first extension portion 32 is not likely to contact or collide with the electrode terminal 21, thereby reducing possible damage to the electrode terminal 21.

[0164] In this embodiment, the first support portion 31 provides support for the first extension portion 32, so that the first extension portion 32 can provide support for the box body 10; the first extension portion 32 is spaced apart from the electrode terminal 21, so that the first extension portion 32 is difficult to contact the electrode terminal 21, thereby reducing the risk of the first extension portion 32 rubbing or colliding with the electrode terminal 21, and reducing possible damage to the electrode terminal 21.

[0165] refer to Figure 3 、 Figure 7 、 Figure 8 In some embodiments, the shell 23 includes a shell body 231 and an end cover 232 connected to the shell body 231, the end cover 232 is arranged on one side of the shell body 231 along the first direction, the electrode terminal 21 is arranged on the end cover 232, and the first pressure relief structure 22 is arranged on the side of the shell body 231 opposite to the end cover 232; the first support portion 31 is supported by the end cover 232, and the first extension portion 32 is spaced apart from the end cover 232.

[0166] The end cap 232 is a component that covers the opening of the housing body 231 to isolate the internal environment of the battery cell 20 from the external environment. The housing body 231 is a component used to cooperate with the end cap 232 to form the internal environment of the battery cell 20.

[0167] The end cover 232 is provided on one side of the shell body 231 along the first direction, and the electrode terminal 21 is provided on the end cover 232. When the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 faces the box cover 11, the battery cell 20 is placed upright in the box body 10; the first pressure relief structure 22 is provided on the side of the shell body 231 opposite to the end cover 232. When the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 faces the box cover 11, the first pressure relief structure 22 is located on the side of the shell body 231 facing the bottom structure 12, so that the high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell 20 can be discharged toward the bottom structure 12, thereby reducing the negative impact of the thermal runaway of the battery cell 20 on the box cover 11, and can also reduce the damage caused by the high-temperature and high-pressure flue gas generated by the thermal runaway to structures such as the electrode terminal 21; when the box cover 11 serves as the floor of the vehicle 1000, this arrangement can also reduce the negative impact of the thermal runaway of the battery cell 20 on the passenger compartment.

[0168] Because the end cover 232 is located on the side of the shell body 231 facing the box body 10, and the first support member 30 is located between the box body 10 and the battery cell 20 along the first direction, the first support portion 31 of the first support member 30 is connected to the end cover 232; the first support portion 31 can only cover part of the end cover 232, or it can cover the entire end cover 232.

[0169] Because the electrode terminal 21 is located on the end cover 232, the first extension portion 32 is also spaced apart from the end cover 232 so that the first extension portion 32 is unlikely to directly contact the electrode terminal 21, thereby reducing friction and collision damage that the first extension portion 32 may cause to the electrode terminal 21; the projection of the first extension portion 32 on the end cover 232 may only cover part of the end cover 232, or may cover the entire end cover 232.

[0170] This embodiment provides some specific structures of the battery cell 20, so that the first support portion 31 is abutted against the end cover 232, so that the battery cell 20 can provide support for the first support portion 31 through the shell body 231 and the end cover 232; the first extension portion 32 is spaced apart from the end cover 232 to reduce the risk of the first extension portion 32 rubbing or colliding with the electrode terminal 21, thereby reducing possible damage to the electrode terminal 21.

[0171] refer to Figure 7 、 Figure 8 In some embodiments, in the first direction, the projection of the first support portion 31 on the end cover 232 is staggered from the projection of the electrode terminal 21 on the end cover 232 .

[0172] When the battery cell 20, the first support member 30 and the corresponding side walls of the box body 10 are arranged in sequence along the first direction, the projection of the first support portion 31 on the end cover 232 refers to the area of ​​the end cover 232 covered by the connection portion between the first support portion 31 and the end cover 232, and the projection of the electrode terminal 21 on the end cover 232 refers to the area of ​​the end cover 232 covered by the electrode terminal 21.

[0173] The projection of the first support portion 31 on the end cover 232 is staggered from the projection of the electrode terminal 21 on the end cover 232, that is, the first support portion 31 and the electrode terminal 21 are staggered and do not interfere with each other, so that it is difficult for the first support portion 31 to rub or collide with the electrode terminal 21, thereby reducing the damage that the first support portion 31 may cause to the electrode terminal 21. At the same time, this arrangement can also make it difficult for the force on the first support portion 31 to be directly transmitted to the electrode terminal 21, thereby reducing the force on the electrode terminal 21 and reducing the damage that may be caused to the electrode terminal 21.

[0174] In this embodiment, the first support portion 31 and the electrode terminal 21 are staggered to reduce friction and collision damage to the electrode terminal 21 caused by the first support portion 31, thereby reducing the risk of damage to the electrode terminal 21 and improving the stability of the battery device 100.

[0175] refer to Figure 7 、 Figure 8 In some embodiments, in the first direction, the projection of the first support portion 31 on the corresponding side wall of the box body 10 at least partially overlaps with the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10.

[0176] When the battery cell 20, the first support member 30 and the corresponding side walls of the box body 10 are arranged in sequence along the first direction, the projection of the first support portion 31 on the corresponding side wall of the box body 10 refers to the area of ​​the corresponding side wall of the box body 10 covered by the first support portion 31 in the first direction, and the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10 refers to the area of ​​the box cover 11 covered by the side wall of the shell body 231 in the first direction.

[0177] For example, when the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 faces the box cover 11, the projection of the first support portion 31 on the corresponding side wall of the box body 10 refers to the area of ​​the box cover 11 covered by the first support portion 31 in the height direction Z, and the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10 refers to the area of ​​the box cover 11 covered by the side wall of the shell body 231 in the height direction Z.

[0178] The projection of the first support portion 31 on the corresponding side wall of the box body 10 at least partially overlaps with the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10, that is, at least a portion of the first support portion 31 is opposite to at least a portion of the side wall of the shell body 231. When the corresponding side wall of the box body 10 is subjected to pressure, part of the pressure can be transmitted to the first support portion 31 through the first extension portion 32, and then transmitted to the side wall of the shell body 231 through the first support portion 31, and then transmitted to other parts of the battery cell 20 and other positions of the box body 10 through the side wall of the shell body 231. At this time, the first support member 30, the battery cell 20, other positions of the box body 10, or other structures in the battery device 100 can share a portion of the pressure borne on the corresponding side wall of the box body 10, thereby improving the load-bearing capacity and support performance of the box body 10, and also improving the overall stability of the battery device 100.

[0179] It can be understood that the overlapping area between the projection of the first support part 31 on the corresponding side wall of the box body 10 and the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10 can be made larger, so that the force on the first support part 31 can be better transmitted to the side wall of the shell body 231, and the local stress concentration can be reduced, thereby reducing damage to the first support part 31 and the shell body 231.

[0180] In this embodiment, at least a portion of the first support portion 31 in the height direction of the battery device 100 is able to be opposite to the shell body 231, so that the first support portion 31 can transfer part of the force it bears to the shell body 231, thereby enabling the shell body 231 to better provide support for the first support portion 31, further improving the strength of the box body 10.

[0181] In some embodiments, the first support member 30 is a hard insulating structural member.

[0182] The first support member 30 is a hard structural member, so that the first support member 30 can better provide support for the corresponding side walls of the box body 10. Part of the pressure borne by the corresponding side walls of the box body 10 can be directly transmitted to the first support member 30, and then transmitted to the battery cell 20 and the bottom structure 12 through the first support member 30. The hard first support member 30 can bear more force during the force transmission process, thereby better sharing the pressure borne on the corresponding side walls of the box body 10 and improving the supporting performance of the corresponding side walls of the box body 10.

[0183] The first support member 30 is also an insulating structural member. Since the first support member 30 is located near the electrode terminal 21, and the connection structure between the electrode terminal 21 and the adjacent battery cell 20 (such as the bar, etc.) carries electrical energy, this setting can reduce the interference of the first support member 30 on the electrode terminal 21 and the connection structure of the adjacent battery cell 20, and can also reduce the risk of discharge and improve the safety performance of the battery device 100.

[0184] The first support member 30 may be made of metal, plastic or other materials.

[0185] For example, the material of the first support member 30 may include phenolic plastic, which has excellent insulation performance and mechanical strength, can provide good support performance for the corresponding side walls of the box body 10, and can also improve the safety performance and stability of the battery device 100.

[0186] For example, the material of the first support member 30 may also include a composite material of polyvinyl chloride (PVC) and epoxidized natural rubber (ENR). The composite material has high toughness and mechanical strength, and also has excellent insulation properties. It can not only provide better support performance for the corresponding side walls of the box body 10, but also improve the safety performance and stability of the battery device 100.

[0187] For example, the material of the first support member 30 can also include alumina ceramics, which have good insulation properties, high mechanical strength and good wear resistance. It can not only provide better support performance for the corresponding side walls of the box body 10, but also improve the safety performance and stability of the battery device 100, and also have a longer service life.

[0188] It is understandable that the material of the first support member 30 may also include other hard insulating materials, and is not limited to phenolic plastics, composite materials of polyvinyl chloride (PVC) and epoxidized natural rubber (ENR), and alumina ceramics.

[0189] In this embodiment, the first support member 30 is a hard structural member, so that the first support member 30 can better provide support for the box body 10 .

[0190] refer to Figure 7 、 Figure 8 In some embodiments, the battery device 100 further includes a second support member 40 , one side of the second support member 40 is connected to the first extension portion 32 and / or the box body 10 , and at least a portion of the other side of the second support member 40 is connected to the electrode terminal 21 .

[0191] The second support member 40 refers to a structure in the battery device 100 that is provided between the battery cell 20 and the first extension portion 32, and between the battery cell 20 and the corresponding side wall of the box body 10. The second support member 40 is used to provide support for the first extension portion 32. When part of the first extension portion 32 extends outward from the first support portion 31 and is suspended in the air, the second support member 40 can provide support for the suspended part of the first extension portion 32, so that the first extension portion 32 can better provide support for the corresponding side wall of the box body 10 under the support of the second support member 40; the second support member 40 can also be provided on the first extension portion 31. The position not covered by 32 is connected to the corresponding side wall of the box body 10 to provide support for the corresponding side wall of the box body 10; the second support member 40 may include a solid columnar structure, or a hollow frame structure or other structure; the number of second support members 40 may be one, or two or more, and one second support member 40 may be connected to only one battery cell 20, that is, the second support member 40 and the battery cell 20 have a one-to-one correspondence, and one second support member 40 may also be connected to multiple battery cells 20 at the same time; the material of the second support member 40 may include metal, plastic or other materials.

[0192] One side of the second support member 40 is connected to the first extension portion 32 and / or the corresponding side wall of the box body 10. The side of the second support member 40 connected to the first extension portion 32 can be fixedly connected to the first extension portion 32 and / or the corresponding side wall of the box body 10 by welding, bonding or other means, or can be detachably connected to the first extension portion 32 and / or the corresponding side wall of the box body 10 by screwing, snapping or other means.

[0193] At least a portion of the other side of the second support member 40 is connected to the electrode terminal 21, that is, the portion of the other side of the second support member 40 can be connected to the electrode terminal 21 of the battery cell 20, or it can be connected to the connecting structure (such as a tab) between two adjacent battery cells 20. The portion of the other side of the second support member 40 can also be connected to the end cover 232 of the battery cell 20.

[0194] The second support member 40 is connected to one side of the electrode terminal 21 and can be detachably connected to the electrode terminal 21 or the end cover 232 by screwing, snapping or other means, or can be fixedly connected to the electrode terminal 21 or the end cover 232 by welding, bonding or other means.

[0195] The second support member 40 may also be only in contact with and connected to the electrode terminal 21 or the end cap 232 , and pressed against the electrode terminal 21 or the end cap 232 by the pressure of the first extension portion 32 , so as to fix the second support member 40 in the box body 10 .

[0196] The second support member 40 can fill the gap between the first extension portion 32 and the end cover 232, the electrode terminal 21 and other structures, so that the battery cell 20 can better provide support for the corresponding side walls of the box body 10 through the second support member 40 and the first support member 30, thereby better improving the supporting performance of the box body 10.

[0197] The setting of the second support member 40 can also make it difficult for the electrode terminal 21 and the connecting structure between adjacent battery cells 20 (such as tabs, etc.) to directly contact the first extension portion 32, so as to reduce the friction and collision of the first extension portion 32 on the electrode terminal 21 or other structures of the battery cell 20, thereby protecting the battery cell 20, reducing damage to the battery cell 20, and improving the service life of the battery device 100.

[0198] In this embodiment, a second support member 40 is provided between the first extension portion 32 and the end cover 232. The second support member 40 provides support for the first extension portion 32, so that the first support member 30 can better provide support for the corresponding side walls of the box body 10, thereby better improving the strength of the box body 10.

[0199] refer to Figure 7 、 Figure 8 In some embodiments, the second support member 40 includes a second support portion 41 and a second extension portion 42 connected to the second support portion 41, one side of the second support portion 41 is connected to the first extension portion 32 and / or the box body 10, and the other side of the second support portion 41 is connected to the shell 23 and is staggered with the electrode terminal 21; one side of the second extension portion 42 is connected to the first extension portion 32 and / or the box body 10, and the other side of the second extension portion 42 is opposite to the electrode terminal 21 and connected to the electrode terminal 21.

[0200] The second support portion 41 refers to the partial structure of the second support member 40 that is connected to the shell 23. The second support portion 41 can be a solid columnar structure, or a hollow frame structure or other structure; only one second support portion 41 can be set on a second support member 40, or two or more second support portions 41 can be set. A second support portion 41 can be connected to only one battery cell 20, that is, the second support portion 41 and the battery cell 20 correspond one to one, or it can be connected to multiple battery cells 20 at the same time; the material of the second support portion 41 can include metal, plastic or other materials.

[0201] One side of the second support portion 41 is connected to the shell 23 and is staggered with the electrode terminal 21 to reduce the friction and collision damage that the second support portion 41 may cause to the electrode terminal 21. At this time, the second support portion 41 can be connected to the end cover 232; the second support portion 41 can be detachably connected to the end cover 232 by screwing, snapping or other means, or can be fixedly connected to the end cover 232 by welding, bonding or other means. The second support portion 41 can also only contact the end cover 232 and be pressed against the end cover 232 by the pressure of the first extension portion 32, thereby achieving the fixation of the second support portion 41.

[0202] The other side of the second support portion 41 can be connected to the first extension portion 32 to provide support for the suspended portion of the first extension portion 32, so that the first extension portion 32 can better provide support for the box body 10; the other side of the second support portion 41 can also be connected to the corresponding side wall of the box body 10 at a position not covered by the first extension portion 32 to provide support for the box body 10.

[0203] The second extension portion 42 refers to a partial structure in the second support member 40 that is opposite to and connected to the electrode terminal 21 and the connection structure (such as a tab, etc.) between adjacent battery cells 20. When the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 of the battery cell 20 faces the box cover 11, the second extension portion 42 is located above the electrode terminal 21 and the connection structure (such as a tab, etc.) between adjacent battery cells 20; the second extension portion 42 can be a solid plate structure, or a hollow plate structure or other structure; one second extension portion 42 can be connected to one or more second support portions 41, and one second support portion 41 can also be connected to one or more second extension portions 42; the second extension portion 42 can be integrally formed with the second support portion 41, or can be fixedly connected to the second support portion 41 by welding, bonding or other means, or can be detachably connected to the second support portion 41 by screwing, clamping or other means; the material of the second extension portion 42 can include metal, plastic or other materials, and the material of the second extension portion 42 can be the same as or different from the material of the second support portion 41.

[0204] The second extension portion 42 can extend in a plane perpendicular to the first direction in a direction away from the second support portion 41 to fill the space between the first extension portion 32 and the electrode terminal 21, and fill the space between the first extension portion 32 and the connecting structure (such as a tab, etc.) of the adjacent battery cell 20, so that the second extension portion 42 can provide support for the suspended portion of the first extension portion 32.

[0205] The second extension portion 42 may be connected to the electrode terminal 21 by welding, bonding or other means, or the second extension portion 42 may simply contact the electrode terminal 21 and be held on the electrode terminal 21 by the pressure of the first extension portion 32 , thereby fixing the second extension portion 42 .

[0206] One side of the second extension portion 42 is connected to the first extension portion 32 and the other side is connected to the electrode terminal 21 and the connection structure between adjacent battery cells 20 (such as a tab, etc.) to provide support for the suspended part of the first extension portion 32, so that the first extension portion 32 can better provide support for the corresponding side wall of the box body 10; at the same time, the second extension portion 42 can also make it difficult for the electrode terminal 21 to directly contact the first extension portion 32, thereby protecting the electrode terminal 21; one side of the second extension portion 42 can also be connected to the corresponding side wall of the box body 10 at a position that is not covered by the first extension portion 32, so as to fill the space between the corresponding side wall of the box body 10 and the end cover 232 and directly provide support for the corresponding side wall of the box body 10.

[0207] In this embodiment, the second support member 40 includes a second support portion 41 and a second extension portion 42. The first extension portion 32 is supported by the second support portion 41 to improve the supporting performance of the first extension portion 32 on the corresponding side wall of the box body 10. The second extension portion 42 is used to fill the space between the first extension portion 32 and the electrode terminal 21 to reduce the gap between the corresponding side wall of the box body 10 and the battery cell 20, thereby further improving the strength of the box body 10.

[0208] In some embodiments, at least a portion of the second support member 40 is a rigid insulating structure or a flexible insulating structure.

[0209] The second support member 40 is an insulating structural member. Since the second support member 40 is located near the electrode terminal 21, and the connection structure between the electrode terminal 21 and the adjacent battery cell 20 (such as the tab, etc.) carries electrical energy, this setting can reduce the interference of the second support member 40 on the electrode terminal 21 and the connection structure of the adjacent battery cell 20, and can also reduce the risk of discharge and improve the safety performance of the battery device 100.

[0210] The second support member 40 can be a hard structural member, so that the second support member 40 can better provide support for the first extension portion 32, so that the second support member 40 can better share the pressure borne on the corresponding side wall of the box body 10, and can improve the supporting performance of the corresponding side wall of the box body 10; the second support member 40 can also be a flexible structural member, so that the second support member 40 can fill the space between the first extension portion 32 and the end cover 232 to provide certain support for the extension, and the second support member 40 can also provide protection for the connection structure (such as a tab, etc.) between the electrode terminal 21 and the adjacent battery cell 20, reduce the possible friction and collision damage thereto, and improve the stability of the battery device 100.

[0211] Only a portion of the second support member 40 may be a hard insulating structure, and the other portion may be a flexible insulating structure; or the entire second support member 40 may be a hard insulating structure or a flexible insulating structure.

[0212] The second support member 40 may be made of metal, plastic, or other materials. For example, the second support member 40 may be made of phenolic plastic, which has excellent insulation properties and mechanical strength. This plastic not only provides good support for the corresponding side walls of the housing 10 but also improves the safety and stability of the battery device 100. For example, the second support member 40 may be made of insulating foam, such as polyethylene foam or polyurethane foam. Insulating foam has good insulation properties and high elasticity. It can deform and absorb part of the force when the first extension 32 transmits force to the second support member 40, thereby reducing the force on the connection structure (such as the tab) between the electrode terminal 21 and the adjacent battery cell 20 and protecting the connection structure (such as the tab) between the electrode terminal 21 and the adjacent battery cell 20. It is understood that the second support member 40 may also be made of other hard or flexible insulating materials, not limited to the two aforementioned materials.

[0213] This embodiment provides some structures of the second support member 40 so that the second support member 40 can better support the box body 10 or reduce the risk of damage to the electrode terminal 21 .

[0214] refer to Figure 7 、 Figure 8 In some embodiments, the hardness of the second support member 40 is less than or equal to the hardness of the first support member 30 .

[0215] The hardness of the second support member 40 may be less than the hardness of the first support member 30 , or the hardness of the second support member 40 may be equal to the hardness of the first support member 30 .

[0216] Because the second support member 40 directly contacts the electrode terminal 21 and the connection structure between adjacent battery cells 20 (such as tabs, etc.), the hardness of the second support member 40 is less than or equal to the hardness of the first support member 30, so as to reduce the impact of the second support member 40 on the electrode terminal 21 and the connection structure between adjacent battery cells 20 (such as tabs, etc.). At the same time, this setting can also enable the second support member 40 to provide certain supporting performance.

[0217] In this embodiment, since the second support member 40 contacts the electrode terminal 21 , the hardness of the second support member 40 is less than or equal to that of the first support member 30 , which can reduce the risk of the second support member 40 damaging the electrode terminal 21 .

[0218] In some embodiments, the tensile modulus of the first support member 30 is greater than or equal to 30 GPa (GigaPascals); and / or the tensile modulus of the second support member 40 is greater than or equal to 30 GPa.

[0219] The tensile modulus of the first support member 30 is greater than or equal to 30 GPa, that is, the tensile modulus of the first support member 30 may be 30 GPa, or may be 40 GPa, 50 GPa, 360 GPa, 70 GPa, 100 GPa or other parameters.

[0220] The tensile modulus of the second support member 40 is greater than or equal to 30 GPa, that is, the tensile modulus of the second support member 40 may be 30 GPa, or may be 40 GPa, 50 GPa, 360 GPa, 70 GPa, 100 GPa or other parameters.

[0221] For example, the tensile modulus of the first support member 30 and the second support member 40 may both be 50 GPa, so that the first support member 30 and the second support member 40 have higher strength.

[0222] The tensile modulus of the first support member 30 and the second support member 40 reflects the strength of the first support member 30 and the second support member 40 . The larger the value of the tensile modulus, the higher the strength of the first support member 30 and the second support member 40 , and the better the supporting performance of the box body 10 .

[0223] Since both the first support member 30 and the second support member 40 can provide support for the box body 10, the tensile modulus of only one of the first support member 30 or the second support member 40 can be greater than or equal to 30GPa, or the tensile modulus of both the first support member 30 and the second support member 40 can be greater than 30GPa.

[0224] When the hardness of the second support member 40 is less than or equal to the hardness of the first support member 30 , the tensile modulus of the first and second support members 30 , 40 may both be greater than 30 GPa, or only the tensile modulus of the first support member 30 may be greater than 30 GPa.

[0225] This embodiment provides some strength parameters and ranges of the first support member 30 and / or the second support member 40, so that the first support member 30 and / or the second support member 40 have higher strength, thereby being able to better support the box.

[0226] refer to Figure 7 、 Figure 8 In some embodiments, the second supporting portion 41 is a rigid insulating structure, and the second extending portion 42 is a rigid or flexible insulating structure.

[0227] Because one end of the second support portion 41 is connected to the end plate and the other end is connected to the first extension portion 32, and because the second support portion 41 is mainly used to provide support for the portion of the first extension portion 32 extending outside the first support portion 31, the second support portion 41 is a hard structure, so that the second support portion 41 can better provide support for the first extension portion 32, thereby enabling the first extension portion 32 to better provide support for the corresponding side walls of the box body 10, and can further improve the supporting performance of the box body 10.

[0228] The material of the second supporting portion 41 may include phenolic plastic, alumina ceramic or other insulating hard materials.

[0229] Because the second extension portion 42 is arranged between the electrode terminal 21 and the first extension portion 32, and between the connection structure of the adjacent battery cells 20 (such as the tab, etc.) and the first extension portion 32 to fill the gap and provide a certain support for the first extension portion 32, the second extension portion 42 can be a hard structure, so that the second extension portion 42 can better provide support for the first extension portion 32; at this time, the material of the second extension portion 42 can be phenolic plastic, alumina ceramic or other insulating hard materials.

[0230] Because the second extension portion 42 is also used to protect the electrode terminal 21, the connection structure of the adjacent battery cell 20 (such as a tab, etc.) or other structures, the second extension portion 42 can be a flexible structure. When the second extension portion 42 is a flexible structure, the second extension portion 42 can better provide protection for the electrode terminal 21, the connection structure of the adjacent battery cell 20 (such as a tab, etc.) or other structures; at this time, the material of the second extension portion 42 can be insulating foam, glass fiber or other insulating flexible materials.

[0231] In this embodiment, the second support portion 41 is a hard insulating structure, so that the second support portion 41 can better provide support for the first extension portion 32, thereby better improving the strength of the corresponding side wall of the box body 10; the second extension portion 42 is a hard or flexible insulating structure, so that the second extension portion 42 can not only provide support for the first extension portion 32, reduce the gap between the first extension portion 32 and the battery cell 20, but also reduce the risk of the second extension portion 42 causing damage to the electrode terminal 21.

[0232] In some embodiments, the battery device 100 includes a housing 10 , a battery cell 20 , a first pressure relief structure 22 , a second pressure relief structure 15 , a first support member 30 , and a second support member 40 .

[0233] The box body 10 includes a box cover 11, a frame structure 14 and a bottom structure 12, and the three can enclose a first cavity 101 to accommodate the battery cell 20; the box cover 11 faces the interior of the passenger compartment of the vehicle 1000, and the box cover 11 is used to serve as at least part of the floor of the vehicle 1000; the bottom structure 12 faces the ground, and a avoidance hole 121 is provided on the bottom structure 12; a protective plate 13 is also provided on the side of the bottom structure 12 facing the ground, and a second cavity 131 is also provided between the bottom structure 12 and the protective plate 13, one end of the second cavity 131 is connected to the avoidance hole 121, and the other end of the second cavity 131 is connected to the first cavity 101 at a position close to the second pressure relief structure 15, so that the high-temperature and high-pressure flue gas in the second cavity 131 can be discharged to the space outside the box body 10 through the second pressure relief structure 15.

[0234] The second pressure relief structure 15 is provided on the box body 10 , and the second pressure relief structure 15 is connected with the first cavity 101 , the second cavity 131 and the space outside the box body 10 , so that the high-temperature and high-pressure flue gas in the first cavity 101 and the second cavity 131 can be discharged to the space outside the box body 10 .

[0235] The battery cell 20 is accommodated in the first cavity 101. The battery cell 20 includes a shell 23. The shell 23 includes a shell body 231 and an end cover 232. The shell body 231 is provided with an end cover 232 on the side facing the box cover 11. The electrode terminal 21 is provided on the end cover 232. The shell body 231 is provided with a first pressure relief structure 22 on the side facing the bottom structure 12. The first pressure relief structure 22 faces the avoidance hole 121 and is opposite to the avoidance hole 121, so that the high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell 20 can be discharged into the avoidance hole 121.

[0236] The first support member 30 is arranged between the end cover 232 and the box cover 11. The first support member 30 includes a first support portion 31 and a first extension portion 32 connected to the first support portion 31; one end of the first support portion 31 is connected to the end cover 232, and the other end of the first support portion 31 is connected to the box cover 11. The first support portion 31 is staggered from the electrode terminal 21; the first extension portion 32 extends from the first support portion 31 in a direction away from the first support portion 31 along a plane perpendicular to the height direction Z of the box body 10. One side of the first extension portion 32 is connected to the box cover 11, and the other side of the first extension portion 32 is arranged relative to the end cover 232.

[0237] The second support member 40 is arranged between the first extension portion 32 and the end cover 232, and the second support member 40 includes a second support portion 41 and a second extension portion 42; the second support portion 41 is arranged between the first extension portion 32 and the end cover 232, one side of the second support portion is connected to the extension, and the other side of the second support portion 41 is connected to the end cover 232; the second extension portion 42 is arranged between the electrode terminal 21, the bar piece and the first extension portion 32, one side of the second extension portion 42 is connected to the electrode terminal 21 and / or the bar piece, and the other end of the second extension portion 42 is connected to the first extension portion 32.

[0238] In the second aspect, some embodiments of the present application further provide a vehicle 1000, comprising the battery device 100 provided by some embodiments of the first aspect; in the vehicle 1000, the box cover 11 of the box body 10 of the battery device 100 can serve as at least part of the floor structure of the vehicle 1000, and the box cover 11 can serve as the entire floor of the vehicle 1000, or only as part of the floor of the vehicle 1000; at this time, the side of the box cover 11 facing the passenger compartment can be directly used to carry passengers and items, and passengers can directly step on the box cover 11 of the box body 10, and items can also be directly placed on the box cover 11 of the box body 10. Only a partial floor structure or no floor structure can be set in the vehicle 1000, thereby reducing the overall weight of the vehicle 1000 and saving the space of the original floor structure to increase the space of the passenger compartment.

[0239] On the third aspect, some embodiments of the present application further propose an electrical device, including the battery device 100 provided by some embodiments of the first aspect; in the electrical device, the box cover 11 of the box body 10 of the battery device 100 has higher strength and better supporting performance, the box body 10 has stronger protection performance for the battery cells 20, and the box body 10 can also be used to carry other structures or objects.

[0240] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein a first cavity is provided in the box body; a battery cell accommodated in the first cavity, wherein one end of the battery cell in the first direction is connected to the box, and the other end of the battery cell in the first direction is used to support the box; The battery cell includes a shell, an electrode assembly, an electrode terminal and a first pressure relief structure. The electrode terminal and the first pressure relief structure are respectively arranged at the two ends of the shell in the first direction. The electrode assembly is arranged in the shell, and the electrode assembly is connected to the electrode terminal. The battery cell is provided with one end of the electrode terminal for supporting the box body.

2. The battery device according to claim 1, wherein: The box body further includes a second cavity. The box body is provided with a position-avoiding hole communicating with the first cavity and the second cavity. The first pressure relief structure is arranged opposite to the position-avoiding hole in the first direction.

3. The battery device according to claim 2, characterized in that The box body further includes a frame structure, a box cover, a bottom structure and a guard plate, the frame structure is arranged to penetrate in the first direction, the box cover closes one end of the frame structure in the first direction, and the bottom structure closes the other end of the frame structure in the first direction, the avoidance hole is provided on the bottom structure, and the box cover, the frame structure and the bottom structure enclose the first cavity; The guard plate is arranged on a side of the bottom structure facing away from the box cover to form the second cavity together with the bottom structure.

4. The battery device according to claim 3, characterized in that The bottom structure includes a plate structure; The bottom structure is made of metal material through a casting process, or the bottom structure includes a profile.

5. The battery device according to claim 3 or 4, characterized in that: The bottom structure includes a heat exchange component.

6. The battery device according to any one of claims 3 to 5, characterized in that: The box body is provided with a second pressure relief structure, and the second pressure relief structure is used to connect the first cavity with the space outside the box body; The second cavity is communicated with the first cavity at a position close to the second pressure relief structure, so that the material in the second cavity is discharged to the space outside the box through the second pressure relief structure.

7. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further includes a first support member, which is located between one end of the shell where the electrode terminal is provided and the box in the first direction, one side of the first support member is connected to the shell, and the other side of the first support member is connected to the box.

8. The battery device according to claim 7, characterized in that The first support member includes a first support portion and a first extension portion connected to the first support portion, wherein the first support portion is connected to the housing and is staggered with the electrode terminal; The first extension portion is provided on a side of the first support portion away from the battery cell, the first extension portion is connected to the box body, and the first extension portion is opposite to and spaced from the electrode terminal.

9. The battery device according to claim 8, characterized in that The housing includes a housing body and an end cap connected to the housing body, the end cap is provided on one side of the housing body along the first direction, the electrode terminal is provided on the end cap, and the first pressure relief structure is provided on a side of the housing body opposite to the end cap; The first supporting portion is supported by the end cover, and the first extending portion is spaced apart from the end cover.

10. The battery device according to claim 9, characterized in that In the first direction, a projection of the first support portion on the end cover is staggered from a projection of the electrode terminal on the end cover.

11. The battery device according to claim 9 or 10, characterized in that: In the first direction, a projection of the first supporting portion on a corresponding side wall of the box body at least partially overlaps with a projection of a side wall of the housing body on a corresponding side wall of the box body.

12. The battery device according to any one of claims 8 to 11, characterized in that: The first supporting member is a hard insulating structural member.

13. The battery device according to any one of claims 8 to 12, characterized in that: The battery device further includes a second support member, one side of the second support member is connected to the first extension portion and / or the box body, and at least a portion of the other side of the second support member is connected to the electrode terminal.

14. The battery device according to claim 13, wherein: The second support member includes a second support portion and a second extension portion connected to the second support portion, one side of the second support portion is connected to the first extension portion and / or the box body, and the other side of the second support portion is connected to the housing and is staggered with the electrode terminal; One side of the second extension portion is connected to the first extension portion and / or the box body, and the other side of the second extension portion is opposite to the electrode terminal and connected to the electrode terminal.

15. The battery device according to claim 13 or 14, characterized in that: At least a portion of the second support member is a hard insulating structure or a flexible insulating structure.

16. The battery device according to claim 15, characterized in that The hardness of the second support member is less than or equal to the hardness of the first support member.

17. The battery device according to claim 16, characterized in that The tensile modulus of the first support member is greater than or equal to 30 GPa; and / or The tensile modulus of the second support member is greater than or equal to 30 GPa.

18. The battery device according to claim 14, wherein: The second supporting portion is a hard insulating structure, and the second extending portion is a hard insulating structure or a flexible insulating structure.

19. A vehicle, characterized in that: The battery device according to any one of claims 1 to 18, wherein the box cover of the box body is used as at least a part of the floor structure of the vehicle.

20. An electrical device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 18.

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