Battery device, power utilization device and vehicle

Abstract

The utility model is applicable to the technical field of power battery devices, and provides a battery device, a power utilization device and a vehicle. An electrical structure; a first containing cavity and a second containing cavity are formed in the box body, and at least part of the second containing cavity is located above the first containing cavity in the gravity direction; the one-way valve is arranged on the box body, one end of the one-way valve faces the first containing cavity, the other end of the one-way valve faces the second containing cavity, and the one-way valve is configured to allow the fluid in the second containing cavity to enter the first containing cavity and is further used for preventing the fluid in the first containing cavity from entering the second containing cavity; according to the battery device provided by the embodiment of the invention, the one-way valve is arranged, so that the fluid in the second accommodating cavity is conveniently discharged to the first accommodating cavity, the damage of the fluid leaked from the liquid cooling structure to the electrical structure is reduced, and the damage of high-temperature and high-pressure flue gas generated by thermal runaway of the battery monomers to the electrical structure is reduced.

Description

Technical Field

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

[0002] In current battery devices, both the compartments for storing battery cells and the compartments for storing electrical structures are prone to condensation or liquids that leak or penetrate other structures, leading to short circuits and other problems.

[0003] Moreover, in the event of thermal runaway of a battery cell, the high-temperature and high-pressure flue gas generated by the thermal runaway can easily enter the compartment where the electrical structure is stored, causing the electrical structure to fail, short-circuit, or even catch fire due to high temperature. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, an electrical device and a vehicle, which can reduce the risk of failure of the electrical structure in the battery device.

[0005] In a first aspect, some embodiments of the present application provide a battery device, including:

[0006] A battery cell; an electrical structure; a box body, wherein a first accommodating chamber and a second accommodating chamber are provided in the box body, the first accommodating chamber is used to accommodate the battery cell, the second accommodating chamber is used to accommodate the electrical structure, and at least a portion of the second accommodating chamber is located above the first accommodating chamber; a one-way valve is provided on the box body, one end of the one-way valve faces the first accommodating chamber, and the other end of the one-way valve faces the second accommodating chamber, the one-way valve is configured to allow fluid in the second accommodating chamber to enter the first accommodating chamber, and the one-way valve is also used to prevent fluid in the first accommodating chamber from entering the second accommodating chamber.

[0007] In the technical solution of this embodiment, a first accommodating chamber and a second accommodating chamber are provided to accommodate the battery cell and the electrical structure respectively, and a one-way valve is provided to allow the fluid in the second accommodating chamber to enter the first accommodating chamber, so as to discharge the fluid in the second accommodating chamber to the first accommodating chamber, thereby reducing the damage to the electrical structure caused by the fluid leaked from the liquid-cooling structure; the one-way valve can also prevent the high-temperature and high-pressure flue gas in the first accommodating chamber from entering the second accommodating chamber, thereby reducing the damage to the electrical structure caused by the high-temperature and high-pressure flue gas generated by thermal runaway of the battery cell; the second accommodating chamber is located outside the first accommodating chamber and above the first accommodating chamber, so that the fluid generated by the leakage of the liquid-cooling structure can be discharged through the one-way valve, and at the same time, it can also reduce the negative impact of the electrical structure on the energy density of the battery device.

[0008] In some embodiments, the box body includes an upper box body and a lower box body connected to the upper box body, the lower box body is provided with a first accommodating cavity with one end open, and the upper box body covers the open side of the first accommodating cavity; the box body also includes an outer shell, the outer shell is provided on the side of the upper box body away from the lower box body, and a second accommodating cavity is provided in the outer shell.

[0009] The technical solution of this embodiment provides some specific structures of the box body, so that the upper box body and the lower box body form a first accommodating cavity, and the upper box body and the outer shell form a second accommodating cavity, so as to respectively accommodate the battery cells and the electrical structure; the outer shell and the lower box body are respectively arranged on both sides of the upper box body, so as to separate the first accommodating cavity and the second accommodating cavity through the upper box body, thereby reducing mutual interference between the battery cells and the electrical structure.

[0010] In some embodiments, the one-way valve includes a valve body connected to the upper box body, a flow cavity and a first flow channel and a second flow channel connected to the flow cavity are opened in the valve body, the other end of the first flow channel is connected to the first accommodating cavity, and the other end of the second flow channel is connected to the second accommodating cavity; the one-way valve also includes a valve core movably connected to the valve body, and the movement of the valve core can open or close the first flow channel and / or the second flow channel.

[0011] The technical solution of this embodiment provides some one-way valve structures, so that the valve core of the one-way valve can move relative to the valve body, so that the valve core can open or close the one-way valve, thereby realizing the one-way valve's control over the flow direction of the fluid.

[0012] In some embodiments, the valve body also includes a sealing surface facing the first accommodating cavity, and one end of the first flow channel connected to the first accommodating cavity is located on the sealing surface; the valve core includes a sealing portion, which is movably connected to the valve body, and the sealing portion can be pressed against the sealing surface to close the first flow channel.

[0013] In the technical solution of this embodiment, the valve body includes a sealing surface facing the first accommodating chamber, and the valve core includes a sealing portion located outside the circulation chamber, so that the sealing portion can abut against the sealing surface to close the first flow channel, thereby achieving the effect of closing the one-way valve; in the event of thermal runaway of the battery cell in the first accommodating chamber, the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery cell can infer that the sealing portion abuts against the sealing surface, causing the one-way valve to close, thereby preventing the high-temperature and high-pressure flue gas from entering the second accommodating chamber; at the same time, in the event of fluid leakage in the second accommodating chamber, the leaked fluid can enter the circulation chamber through the second flow channel, and can push the sealing portion away from the sealing surface, so that the fluid in the second accommodating chamber can be discharged to the first accommodating chamber.

[0014] In some embodiments, a limiting structure is provided on the valve body, and a limiting hole connected to the flow cavity is opened on the limiting structure; the valve core also includes a limiting portion, which is connected to the sealing portion through a connecting portion, and the limiting portion and the sealing portion are respectively located on both sides of the limiting structure, and the maximum width of the limiting portion is greater than the inner diameter of the limiting hole.

[0015] In the technical solution of this embodiment, the valve core includes a limiting portion to limit the displacement of the sealing portion, so that the sealing portion is not easily separated from the valve body and falls off, thereby improving the stability of the one-way valve.

[0016] In some embodiments, the limiting hole is located on a side of the circulation cavity facing the second accommodating cavity, and the sealing surface is located on a side of the circulation cavity facing the first accommodating cavity.

[0017] The technical solution of this embodiment specifically provides some positional relationships between the limiting holes and the sealing surfaces. Since the limiting part is opposite to the limiting hole and the sealing part is opposite to the sealing surface, this setting also limits the relationship between the limiting part and the sealing part, so that the limiting part can better limit the displacement of the sealing part, thereby better improving the stability of the one-way valve.

[0018] In some embodiments, a guide groove is provided on the side of the valve body facing the first accommodating cavity, and the sealing part is accommodated in the guide groove; at least one third through hole is opened on the sealing part, and in the moving direction of the valve core, the third through hole is opposite to the sealing surface.

[0019] In the technical solution of this embodiment, a third through hole is provided on the sealing portion. When the sealing portion is separated from the sealing surface, the fluid can flow from the circulation cavity through the third through hole, so as to facilitate the fluid to flow from the second accommodating cavity to the first accommodating cavity. At the same time, the third through hole is opposite to the sealing surface. When the sealing portion is against the sealing surface, the sealing surface can close the third through hole to prevent the fluid from entering the third through hole from the circulation cavity, thereby improving the sealing performance of the one-way valve.

[0020] In some embodiments, a sealing member surrounding one end of the first flow channel is provided on a side of the sealing surface facing the first accommodating cavity, and the sealing portion can be supported by the sealing member.

[0021] In the technical solution of this embodiment, a sealing member is provided on the sealing surface to further improve the sealing performance of the sealing portion against the sealing surface.

[0022] In some embodiments, the one-way valve includes a first natural state, and the sealing portion opens the first flow channel in the first natural state.

[0023] In the technical solution of this embodiment, the one-way valve is naturally open due to the influence of its own weight, so that the one-way valve can be closed when the battery cell thermally runs away and produces high-temperature and high-pressure flue gas, and the structure of the one-way valve is simplified.

[0024] In some embodiments, the one-way valve further includes an elastic member, one end of the elastic member is connected to the valve core, and the other end is connected to the valve body, and the deformation direction of the elastic member is the same as the movement direction of the valve body.

[0025] In the technical solution of this embodiment, an elastic member is provided so as to control the position of the valve body in a natural state through the elastic member; at the same time, the pressure conditions required for opening or closing the one-way valve are changed by adjusting the stiffness coefficient of the elastic member to meet the needs of different working conditions.

[0026] In some embodiments, the fluid entering the circulation chamber from the second accommodating chamber is a liquid; the one-way valve also includes an expansion member accommodated in the circulation chamber, and the expansion member is configured to expand when soaked in liquid to resist against the inner wall and sealing portion of the circulation chamber; the elastic member is configured to apply a force to the sealing portion pointing in the direction of the sealing surface so that the sealing portion resists against the sealing surface, and the force applied by the elastic member to the sealing portion is less than the expansion force of the expansion member.

[0027] In the technical solution of this embodiment, an expansion body is provided. When liquid leakage occurs in the second accommodating chamber, the leaked liquid can cause the expansion body to expand and the sealing part to separate from the sealing surface, so as to discharge the liquid in the second accommodating chamber; at the same time, when there is no liquid leakage in the second accommodating chamber, the elastic member can cause the sealing part to press against the sealing surface to separate the first accommodating chamber and the second accommodating chamber, thereby reducing the mutual influence between the two.

[0028] In some embodiments, the one-way valve includes a second natural state, the sealing portion closes the first flow channel in the second natural state, and the sealing portion abuts against the sealing surface.

[0029] In the technical solution of this embodiment, the one-way valve is in a closed state under the influence of the elastic member in a natural state, so that the one-way valve can be closed in a natural state to reduce the mutual influence between the first accommodating chamber and the second accommodating chamber, and can also be opened when liquid leakage occurs in the second accommodating chamber to facilitate the discharge of liquid from the second accommodating chamber, thereby reducing damage to the electrical structure.

[0030] In some embodiments, the valve body includes a valve body main body and a fixing part, the valve body main body includes a base and a fixing part connected to the base, the base is located in the first accommodating cavity, the fixing part passes through the upper box body and is located in the second accommodating cavity; the fixing part is connected to the fixing part, and part of the upper box body is clamped between the fixing part and the base.

[0031] In the technical solution of this embodiment, the valve body includes a valve body main body and a fixing member, so that part of the upper box body is clamped between the valve body main body and the fixing member, thereby fixing the one-way valve on the upper box body.

[0032] In some embodiments, an outer wall of the fixing portion is provided with an external thread, and the fixing member is a nut that matches the external thread.

[0033] The technical solution of this embodiment provides some connection methods between the fixing parts and the valve body to facilitate the installation and fixation of the one-way valve.

[0034] In some embodiments, the fixing piece is sleeved on the fixing portion, and a sealing groove is provided on the side of the fixing piece facing the base; a protrusion is provided on the side of the base facing the fixing piece, the protrusion is accommodated in the sealing groove, and the protrusion is supported against the inner wall of the sealing groove.

[0035] In the technical solution of this embodiment, a sealing groove is provided on the fixing part, and a sealing part is provided on the base, and the sealing part is matched with the sealing groove to better improve the sealing performance of the connection position between the fixing part and the valve body, and to improve the sealing performance of the connection position between the valve body and the upper box body.

[0036] In some embodiments, the battery device further includes a heat exchange component, which is disposed in the first accommodating cavity and / or the second accommodating cavity.

[0037] In the technical solution of this embodiment, a heat exchange component is provided to control the temperature in the first accommodating chamber and / or the second accommodating chamber through the heat exchange component to improve the working efficiency of the battery cell and the electrical structure; at the same time, the one-way valve can reduce the damage that may be caused to the electrical structure by leakage of the heat exchange medium.

[0038] In some embodiments, a drain valve is provided at the bottom of the box body to allow the fluid in the first accommodating chamber to flow out of the box body.

[0039] In the technical solution of this embodiment, a drain valve is provided on the box body, so that the fluid in the first accommodating chamber can be discharged outside the box body, thereby reducing the damage of the liquid in the first accommodating chamber to the battery cell.

[0040] In some embodiments, the drain valve is a one-way valve.

[0041] In the technical solution of this embodiment, the drain valve is a one-way valve, so that the drain valve can not only discharge the fluid in the first accommodating chamber, but also prevent debris outside the box from entering the box, thereby reducing the negative impact of the outside world on the battery cell.

[0042] In some embodiments, the box body further includes a guide structure accommodated in the first accommodating cavity, one end of the guide structure faces the one-way valve, and the other end of the guide structure faces the drain valve to guide the fluid flowing out of the one-way valve to flow to the drain valve.

[0043] In the technical solution of this embodiment, a guide structure is provided in the first accommodating chamber, so that the fluid discharged from the second accommodating chamber through the one-way valve can flow to the drain valve under the guidance of the guide structure, thereby reducing the damage that the fluid discharged from the second accommodating chamber may cause to the battery cell.

[0044] In some embodiments, the drain valve and the one-way valve are arranged opposite to each other, and an empty space is provided between the drain valve and the one-way valve.

[0045] In the technical solution of this embodiment, the drain valve and the one-way valve are arranged relative to each other, and there is no other structure between the drain valve and the one-way valve, so that the fluid discharged from the second accommodating chamber can be discharged to the outside of the box body through the drain valve more quickly, reducing the time that the fluid discharged from the second accommodating chamber stays in the first accommodating chamber, and reducing the risk of the fluid discharged from the second accommodating chamber causing damage to the battery cell.

[0046] In some embodiments, the battery cell includes an electrode terminal, and the battery cell is received in the first receiving cavity in an inverted manner so that the electrode terminal is located on a side of the battery cell facing away from the second receiving cavity;

[0047] The electrode terminals are spaced apart from the inner wall of the opposite box.

[0048] In the technical solution of this embodiment, the battery cell is inverted to reduce the possibility that the liquid in the second accommodation chamber falls on the battery cell and may cause damage to the battery cell.

[0049] In a second aspect, some embodiments of the present application further provide an electrical device, including the battery device provided by some embodiments of the first aspect.

[0050] In a third aspect, some embodiments of the present application further provide a vehicle, comprising the battery device provided by some embodiments of the first aspect, wherein the top of the box forms at least a portion of the floor of the vehicle.

[0051] 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

[0052] 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:

[0053] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0054] Figure 2 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0055] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0056] Figure 4 A schematic perspective view of a battery device provided in some embodiments of the present application;

[0057] Figure 5 A schematic diagram of the exploded structure of a box provided in some embodiments of the present application;

[0058] Figure 6A schematic cross-sectional view of a battery device provided in some embodiments of the present application;

[0059] Figure 7 A schematic top view of a one-way valve provided in some embodiments of the present application;

[0060] Figure 8 The one-way valve provided in some embodiments of the present application is in an open state. Figure 7 Schematic cross-sectional view at line AA;

[0061] Figure 9 The one-way valve provided in some embodiments of the present application is in a closed state. Figure 7 Schematic cross-sectional view at line AA;

[0062] Figure 10 The one-way valve provided in other embodiments of the present application is in an open state. Figure 7 Schematic cross-sectional view at line AA;

[0063] Figure 11 The one-way valve provided in other embodiments of the present application is in a closed state. Figure 7 Schematic cross-sectional view at line AA;

[0064] Figure 12 The valve body of the one-way valve provided in some embodiments of the present application is along Figure 7 Schematic cross-sectional view at line AA;

[0065] Figure 13 The fixing member in the one-way valve provided in some embodiments of the present application is along Figure 7 Schematic cross-sectional view at line AA.

[0066] The meanings of the marks in the figure are:

[0067] 1000, vehicle;

[0068] 100. Battery device;

[0069] 10. Battery cell; 11. Housing; 12. End cap; 13. Electrode assembly; 14. Electrode terminal;

[0070] 20. Box body; 201. First accommodating cavity; 202. Second accommodating cavity; 21. Upper box body; 22. Lower box body; 23. Outer shell;

[0071] 30. One-way valve; 31. Valve body; 311. Circulation chamber; 312. First flow channel; 313. Second flow channel; 314. Sealing surface; 315. Limiting structure; 3151. Limiting hole; 316. Valve body; 3161. Base; 3162. Fixing portion; 3163. Raised portion; 317. Fixing member; 3171. Sealing groove; 32. Valve core; 321. Sealing portion; 3211. Third through hole; 322. Limiting portion; 323. Connecting portion; 33. Guide groove; 34. Sealing member; 35. Elastic member; 36. Expansion member.

[0072] 40. Drain valve;

[0073] 50. Electrical structure;

[0074] 60. Heat exchange components;

[0075] 200, motor;

[0076] 300. Controller. DETAILED DESCRIPTION

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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).

[0083] 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.

[0084] 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.

[0085] 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.

[0086] A battery device typically includes battery cells and an electrical structure for controlling the battery device's status. The electrical structure typically includes various control systems (such as a battery status detection system and a charge and discharge control system) and various electrical components (such as sensors, relays, and connectors). The battery cells are housed in an energy compartment, and the electrical structure is housed in a high-voltage compartment. Because both the battery cells and the electrical structure generate significant heat during operation, liquid cooling systems are installed in both the energy compartment and the battery device compartment.

[0087] Because the volume of the high-voltage chamber is usually small, if the liquid cooling structure is damaged, the liquid level of the leaked coolant can easily rise rapidly in the high-voltage chamber and submerge the electrical structure, which can easily cause a short circuit in the electrical structure.

[0088] Thermal runaway of battery cells can easily generate high-temperature and high-pressure flue gas, which can easily enter the high-voltage compartment and cause short circuits in the electrical structure. In current battery devices, the energy compartment and the high-voltage compartment are usually located in the box. The high temperature caused by thermal runaway of battery cells can easily have a negative impact on the electrical structure in the high-voltage compartment, thereby easily causing the failure of the electrical structure.

[0089] Based on the above considerations, in order to reduce the possible damage to the electrical structure in the battery device in the event of coolant leakage and thermal runaway of the battery cell, a battery device is designed, which includes a first accommodating chamber surrounded by an upper box body and a lower box body, and the battery cell is arranged in the first accommodating chamber; a second accommodating chamber surrounded by an upper box body and an outer shell is provided, and the electrical structure is arranged in the second accommodating chamber, and the first accommodating chamber and the second accommodating chamber are respectively located on both sides of the upper box body; a one-way valve is provided on the upper box body, so that the coolant in the second accommodating chamber can enter the first accommodating chamber through the one-way valve, and the high-temperature and high-pressure flue gas in the first accommodating chamber is prevented from entering the second accommodating chamber through the one-way valve.

[0090] In such a battery device, the first accommodating chamber and the second accommodating chamber are separated by the upper box body, thereby reducing the negative impact of the heat generated by the operation or thermal runaway of the battery cell on the electrical structure, reducing the negative impact of the heat generated by the thermal runaway of the electrical structure on the battery cell, and reducing the negative impact of the electrical structure on the energy density of the battery device; the one-way valve can discharge the fluid in the second accommodating chamber to the first accommodating chamber, thereby reducing the damage to the electrical structure caused by the fluid leaked from the liquid cooling structure; the one-way valve can also prevent the high-temperature and high-pressure flue gas in the first accommodating chamber from entering the second accommodating chamber, thereby reducing the damage to the electrical structure caused by the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery cell; the second accommodating chamber is located outside and above the lower box body, so that the fluid generated by the leakage of the liquid cooling structure can be discharged through the one-way valve.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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 .

[0095] refer to Figure 2 , Figure 2 The exploded view of the battery device 100 provided in some embodiments of the present application includes a housing 20 and a battery cell 10 , wherein the battery cell 10 is accommodated in the housing 20 .

[0096] The housing 20 is used to provide a storage space for the battery cells 10, and the housing 20 can adopt a variety of structures. In some embodiments, the housing 20 can include an upper housing 21 and a lower housing 22. The upper housing 21 and the lower housing 22 cover each other, and the upper housing 21 and the lower housing 22 together define a storage space for the battery cells 10. The lower housing 22 can be a hollow structure with one end open, and the upper housing 21 can be a plate-like structure. The upper housing 21 covers the open side of the lower housing 22, so that the upper housing 21 and the lower housing 22 together define a storage space. The upper housing 21 and the lower housing 22 can also be hollow structures with one end open, and the open side of the upper housing 21 covers the open side of the lower housing 22. Of course, the housing 20 formed by the upper housing 21 and the lower housing 22 can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0097] In the battery device 100, there may be multiple battery cells 10, and the multiple battery cells 10 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 10. The multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery device 10 may be housed within the housing 20. Of course, the battery device 100 may also be a module of the battery device 100, in which multiple battery cells 10 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 20. 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 10.

[0098] Each battery cell 10 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 10 may be cylindrical, flat, rectangular, or in other shapes.

[0099] refer to Figure 3 , Figure 3 This is a schematic diagram of the exploded structure of a battery cell 10 provided in some embodiments of the present application. A battery cell 10 is the smallest unit that makes up a battery device 100. As shown in the figure, the battery cell 10 includes an end cap 12, a housing 11, an electrode assembly 13, and other functional components.

[0100] The end cap 12 is a component that covers the opening of the housing 11 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cap 12 can be adapted to the shape of the housing 11 to match the housing 11. Optionally, the end cap 12 can be made of a material with a certain hardness and strength (such as an aluminum alloy). In this way, the end cap 12 is less likely to deform when squeezed or collided, allowing the battery cell 10 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 14 can be provided on the end cap 12. The electrode terminal 14 can be used to electrically connect to the electrode assembly 13 for outputting or inputting electrical energy into or out of the battery cell 10. In some embodiments, the end cap 12 can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The end cap 12 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application are not particularly limited in this regard. In some embodiments, an insulating member may be provided inside the end cap 12 to isolate the electrical connection portion 323 in the housing 11 from the end cap 12 to reduce the risk of short circuit. For example, the insulating member may be made of plastic, rubber, or the like.

[0101] The housing 11 is a component that cooperates with the end cap 12 to form the internal environment of the battery cell 10. This internal environment can be used to accommodate the electrode assembly 13, electrolyte, and other components. The housing 11 and end cap 12 can be separate components. An opening can be provided in the housing 11, and the end cap 12 is placed over the opening to form the internal environment of the battery cell 10. Alternatively, the end cap 12 and housing 11 can be integrated. Specifically, the end cap 12 and housing 11 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 11 needs to be enclosed, the end cap 12 is placed over the housing 11. The housing 11 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 11 can be determined based on the specific shape and size of the electrode assembly 13. The housing 11 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this.

[0102] The electrode assembly 13 is a component in the battery cell 10 where electrochemical reactions occur. One or more electrode assemblies 13 may be contained in the housing 11. The electrode assembly 13 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 13, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive and negative electrode tabs 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 electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals 14 to form a current loop.

[0103] First, reference Figures 4 to 6 The embodiment of the present application provides a battery device 100, comprising: a battery cell 10, an electrical structure 50, a housing 20, and a one-way valve 30. The housing 20 is provided with a first accommodating chamber 201 and a second accommodating chamber 202. The first accommodating chamber 201 is used to accommodate the battery cell 10, and the second accommodating chamber 202 is used to accommodate the electrical structure 50. At least a portion of the second accommodating chamber 202 is located above the first accommodating chamber 201. The one-way valve 30 is provided on the housing 20, with one end of the one-way valve 30 facing the first accommodating chamber 201 and the other end of the one-way valve 30 facing the second accommodating chamber 202. The one-way valve 30 is configured to allow fluid in the second accommodating chamber 202 to enter the first accommodating chamber 201. The one-way valve 30 is also configured to prevent fluid in the first accommodating chamber 201 from entering the second accommodating chamber 202.

[0104] The battery cell 10 refers to the smallest unit constituting the battery device 100 , and the number of the battery cell 10 may be one, or two or more.

[0105] The box body 20 refers to the structure in the battery device 100 for providing a storage space for the battery cell 10. The box body 20 is also used to provide a fixed foundation for the electrical structure 50 or other structures of the battery cell 10; the box body 2020 may include a frame structure, a box-type structure or other structures; the shape of the box body 2020 may be a rectangular parallelepiped, cylindrical or other shapes.

[0106] The first accommodating cavity 201 is a spatial structure inside the box body 20, and the first accommodating cavity 201 is used to accommodate the battery cell 10; the first accommodating cavity 201 is surrounded by a partial structure of the box body 20, and the first accommodating cavity 201 can be a rectangular space, or a semi-cylindrical space, a prismatic space, or a space of other shapes. The shape of the first accommodating cavity 201 can also be set according to the shape of the box body 20.

[0107] The second accommodating cavity 202 is a spatial structure within the box body 20. The second accommodating cavity 202 is used to accommodate the electrical structure 50. The electrical structure 50 may include sensors, relays, connectors, etc. in the battery device 100. The electrical structure 50 may also include a battery status detection system, a charge and discharge control system, etc. in the battery device 100; the second accommodating cavity 202 is surrounded by a partial structure of the box body 20. The second accommodating cavity 202 can be a rectangular space, or a semi-cylindrical space, a prismatic space, or a space of other shapes. The shape of the second accommodating cavity 202 can also be set according to the shape of the box body 20.

[0108] At least part of the second accommodating chamber 202 is located above the first accommodating chamber 201, that is, the second accommodating chamber 202 can be completely located above the first accommodating chamber 201, or the second accommodating chamber 202 can be only partially located above the first accommodating chamber 201, and the other part of the second accommodating chamber 202 can be located on the peripheral side of the first accommodating chamber 201; when fluid appears in the second accommodating chamber 202, the fluid can flow to the bottom of the second accommodating chamber 202 to facilitate the flow of the fluid into the first accommodating chamber 201.

[0109] According to the relative positions of the first accommodating cavity 201 and the second accommodating cavity 202, when the first accommodating cavity 201 and the second accommodating cavity 202 are arranged along the length direction or the width direction of the box body 20, part of the second accommodating cavity 202 can be located above the first accommodating cavity 201, and another part of the second accommodating cavity 202 can be located on one side of the first accommodating cavity 201 along the length direction or the width direction of the box body 20; when the first accommodating cavity 201 and the second accommodating cavity 202 are arranged along the height direction or the gravity direction of the box body 20, part of the second accommodating cavity 202 can be located above the first accommodating cavity 201, or the second accommodating cavity 202 can be located completely above the first accommodating cavity 201.

[0110] The one-way valve 30 refers to a valve structure that allows the medium to flow in one direction and blocks the flow in the opposite direction. The one-way valve 30 can be a spring-loaded one-way valve, a gravity-loaded one-way valve, a swing-type one-way valve, or other types of one-way valves.

[0111] The one-way valve 30 is arranged on the box body 20. The one-way valve 30 can be fixedly connected to the box body 20 by welding, bonding or other means, or can be detachably connected to the box body 20 by screwing, clamping or other means; one end of the one-way valve 30 is connected to the first accommodating chamber 201, and the other end of the one-way valve 30 is connected to the second accommodating chamber 202. The one-way valve 30 can allow the fluid in the second accommodating chamber 202 to flow to the first accommodating chamber 201, and at the same time, the one-way valve 30 can also prevent the fluid in the first accommodating chamber 201 from flowing to the second accommodating chamber 202.

[0112] The fluid in the second accommodating chamber 202 can be a liquid, a gas-liquid mixture, or a gas; when the fluid is a liquid or a gas-liquid mixture, the liquid part in the fluid is likely to cause the electrical structure 50 to short-circuit and cause the electrical structure 50 to fail; when the fluid is a gas, the gas is likely to cause the air pressure in the second accommodating chamber 202 to increase, and the increase in air pressure is likely to cause the gas near the electrical structure 50 to ionize and cause discharge, and the increased air pressure may also cause mechanical damage to the electrical structure 50; the setting of the one-way valve 30 can discharge the fluid in the second accommodating chamber 202 to reduce damage to the electrical structure 50.

[0113] For example, the fluid flowing from the second accommodating chamber 202 to the first accommodating chamber 201 can be a liquid, which can be the coolant leaked from the liquid cooling system of the battery device 100 into the second accommodating chamber 202, or other liquid; in this case, the second accommodating chamber 202 can be located above the first accommodating chamber 201, so that the liquid in the second accommodating chamber 202 can better flow into the first accommodating chamber 201 through the one-way valve 30.

[0114] For example, the fluid flowing from the second accommodating chamber 202 to the first accommodating chamber 201 may also be gas, which may be high-temperature gas generated by certain structural abnormalities of the electrical structure 50; in this case, the second accommodating chamber 202 may be located below the first accommodating chamber 201, or above the first accommodating chamber 201, so that the gas in the second accommodating chamber 202 can better flow into the first accommodating chamber 201 through the one-way valve 30.

[0115] The setting of the one-way valve 30 enables the liquid or gas in the second accommodating chamber 202 to be discharged to the first accommodating chamber 201, thereby reducing damage to the electrical structure 50 in the first accommodating chamber 201; at the same time, when the battery cell 10 in the first accommodating chamber 201 thermally runs away and produces high-temperature and high-pressure flue gas, the one-way valve 30 can also prevent the high-temperature and high-pressure flue gas from entering the second accommodating chamber 202, thereby protecting the electrical structure 50.

[0116] Because the space in the second accommodating chamber 202 is generally small, if the coolant from the liquid cooling system leaks into the second accommodating chamber 202, the coolant level in the second accommodating chamber 202 can easily rise rapidly and submerge the electrical structure 50. Accordingly, in this embodiment, a one-way valve 30 is provided to allow the fluid in the second accommodating chamber 202 to enter the first accommodating chamber 201, thereby facilitating the discharge of the fluid from the second accommodating chamber 202 to the first accommodating chamber 201, thereby reducing damage to the electrical structure 50 caused by the fluid leaking from the liquid cooling structure. The one-way valve 30 can also prevent the high-temperature, high-pressure flue gas in the first accommodating chamber 201 from entering the second accommodating chamber 202, thereby reducing damage to the electrical structure 50 caused by the high-temperature, high-pressure flue gas generated by thermal runaway of the battery cell 10. The second accommodating chamber 202 is located outside and above the first accommodating chamber 201, so that the fluid leaking from the liquid cooling structure can be discharged through the one-way valve 30 under the action of gravity.

[0117] refer to Figures 4 to 6 In some embodiments, the box body 20 includes an upper box body 21 and a lower box body 22 connected to the upper box body 21, and a first accommodating cavity 201 with one end open is provided in the lower box body 22, and the upper box body 21 covers the open side of the first accommodating cavity 201; the box body 20 also includes an outer shell 23, which is provided on the side of the upper box body 21 away from the lower box body 22, and a second accommodating cavity 202 is provided in the outer shell 23.

[0118] The upper box body 21 and the lower box body 22 are both partial structures of the box body 20. The upper box body 21 and the lower box body 22 can jointly define a space for accommodating the battery cell 10; the upper box body 21 can directly cover and be connected to the lower box body 22, or it can be indirectly connected to the lower box body 22 through an intermediate structure; the upper box body 21 can be fixedly connected to the lower box body 22 by welding, bonding or other means, or it can be detachably connected to the lower box body 22 by means of snap connection, screw connection, etc.

[0119] A first accommodating cavity 201 with an open end is provided in the lower box body 22, that is, the lower box body 22 can be a hollow structure with an open end to accommodate part or all of the structure of the battery cell 10; the first accommodating cavity 201 can be a rectangular space, or a semi-cylindrical space, a prismatic space or a space of other shapes; the shape of the lower box body 22 can be rectangular, cylindrical or other shapes; the material of the lower box body 22 can include metal, plastic or other materials.

[0120] The upper box body 21 can be a hollow structure with one end open to accommodate part or all of the structure of the battery cell 10. The upper box body 21 can also be a plate-like structure. The shape of the upper box body 21 can be rectangular, cylindrical or other shapes. The material of the upper box body 21 can include metal, plastic or other materials. The material of the upper box body 21 can be the same as or different from the material of the lower box body 22.

[0121] The upper box body 21 covers the opening side of the first accommodating cavity 201 and is connected to the lower box body 22 to separate the first accommodating cavity 201 from the outside; according to the opening direction of the first accommodating cavity 201, the upper box body 21 can be located above the lower box body 22 and cover the lower box body 22.

[0122] The shell 23 refers to a partial structure of the box body 20; the shape of the shell 23 can be prism-shaped, cylindrical, terraced or other shapes; the shell 23 is arranged on the upper box body 21, and the shell 23 can be fixedly connected to the upper box body 21 by welding, bonding or other means, or can be detachably connected to the upper box body 21 by screwing, snapping or other means; the material of the shell 23 can include metal, plastic or other materials, and the material of the shell 23 can be the same as or different from the material of the upper box body 21.

[0123] The shell 23 is disposed on a side of the upper box body 21 away from the lower box body 22 , that is, the shell 23 is disposed on a side of the upper box body 21 away from the first accommodating chamber 201 , and the shell 23 is located outside the first accommodating chamber 201 .

[0124] The second accommodating chamber 202 can be a space enclosed by the outer shell 23 and the upper box body 21, or the second accommodating chamber 202 can be a space arranged in the outer shell 23; the shape of the second accommodating chamber 202 can be a prismatic space, a cylindrical space or a space of other shapes, and the shape of the second accommodating chamber 202 can also be set according to the shape of the outer shell 23; the first accommodating chamber 201 and the second accommodating chamber 202 are respectively located on both sides of the upper box body 21, that is, the upper box body 21 can separate the first accommodating chamber 201 and the second accommodating chamber 202, thereby reducing the mutual interference between the battery cell 10 and the electrical structure 50. At the same time, arranging the second accommodating chamber 202 outside the first accommodating chamber 201 can also reduce the occupation of the electrical structure 50 on the installation space of the battery cell 10, thereby reducing the negative impact on the energy density of the battery device 100.

[0125] It can be understood that the specific position of the shell 23 on the upper box body 21 can be set according to the structure of the corresponding vehicle 1000, so as to rationally utilize the space of the vehicle 1000, so that the setting of the shell 23 on the upper box body 21 away from the lower box body 22 can not only improve the energy density of the battery device 100, but also reduce the installation space occupied by the vehicle 1000.

[0126] In the current battery device 100, the battery cell 10 and the electrical structure 50 are usually arranged in the same space and separated by a partition structure, which causes the electrical structure 50 to occupy part of the storage space of the battery cell 10 and leads to a reduction in the energy density of the battery device 100; in this embodiment, a shell 23 and a second storage cavity 202 located outside the first storage cavity 201 are provided to provide an independent storage space for the electrical structure 50, thereby reducing the negative impact of the electrical structure 50 on the energy density of the battery device 100.

[0127] This embodiment provides some specific structures of the box body 20, so that the upper box body 21 and the lower box body 22 form a first accommodating cavity 201, and the upper box body 21 and the outer shell 23 form a second accommodating cavity 202, so as to respectively accommodate the battery cell 10 and the electrical structure 50; the outer shell 23 and the lower box body 22 are respectively arranged on both sides of the upper box body 21, so as to separate the first accommodating cavity 201 and the second accommodating cavity 202 through the upper box body 21, thereby reducing mutual interference between the battery cell 10 and the electrical structure 50.

[0128] refer to Figures 7 to 9 In some embodiments, the one-way valve 30 includes a valve body 31 and a valve core 32. The valve body 31 is connected to the upper housing 21. A flow chamber 311 and a first flow channel 312 and a second flow channel 313 communicating with the flow chamber 311 are defined in the valve body 31. The other end of the first flow channel 312 communicates with the first accommodating chamber 201, and the other end of the second flow channel 313 communicates with the second accommodating chamber 202. The valve core 32 is movably connected to the valve body 31. The movement of the valve core 32 can open or close the first flow channel 312 and / or the second flow channel 313.

[0129] The valve body 31 refers to the main structure of the one-way valve 30, and the valve body 31 is used to provide a fixed foundation for the valve core 32 or other structures of the one-way valve 30; the shape of the valve body 31 can be cylindrical, prismatic or other shapes; the material of the valve body 31 can include metal, plastic or other materials.

[0130] The valve body 31 is connected to the upper case 21. The valve body 31 can be fixedly connected to the upper case 21 by welding, bonding, or other means, or can be detachably connected to the upper case 21 by screwing, clamping, or other means. The valve body 31 can be connected to the side of the upper case 21 facing the lower case 22, that is, the valve body 31 can be completely accommodated in the first accommodating chamber 201. In this case, a through hole should be opened at the position opposite to the valve body 31 in the upper case 21 to facilitate fluid circulation. The valve body 31 can also be connected to the side of the upper case 21 facing the outer shell 23, that is, the valve body 31 can also be completely accommodated in the second accommodating chamber 202. In this case, a through hole should be opened at the position opposite to the valve body 31 in the upper case 21 to facilitate fluid circulation. The valve body 31 can also be inserted into the upper case 21, that is, part of the valve body 31 can extend into the first accommodating chamber 201, and the other part can extend into the second accommodating chamber 202.

[0131] The circulation cavity 311 refers to the spatial structure inside the valve body 31 for fluid circulation. The circulation cavity 311 can be a cylindrical space, a prismatic space or a space of other shapes; the first flow channel 312 and the second flow channel 313 are both channel structures on the valve body 31 for fluid circulation. The first flow channel 312 and the second flow channel 313 can be straight channels or curved channels extending along a reference straight line. The cross-sectional shape of the first flow channel 312 and the second flow channel 313 along their radial direction can be circular, square or other shapes.

[0132] The first flow channel 312 and the second flow channel 313 are both connected to the circulation chamber 311. One end of the first flow channel 312 is connected to the circulation chamber 311, and the other end is connected to the first accommodating chamber 201. One end of the second flow channel 313 is connected to the circulation chamber 311, and the other end is connected to the second accommodating chamber 202, so that the fluid in the second accommodating chamber 202 can flow into the first accommodating chamber 201 through the second flow channel 313, the circulation chamber 311 and the first flow channel 312 in sequence.

[0133] The fluid can flow a longer distance in the first flow channel 312, in which case the first flow channel 312 can be a channel-like structure. The fluid can also flow a shorter distance in the first flow channel 312, in which case the first flow channel 312 can be a hole-like structure. Similar to the first flow channel 312, the second flow channel 313 can be a channel-like structure or a hole-like structure.

[0134] The circulation cavity 311 , the first flow channel 312 and the second flow channel 313 may be different parts of the same flow channel, or may be different flow channels or chambers that are interconnected.

[0135] In addition to being used for allowing fluid to flow through, the circulation chamber 311 can also be used to temporarily store part of the fluid; for example, after the fluid in the second accommodating chamber 202 enters the circulation chamber 311 through the second flow channel 313, the fluid can be temporarily stored in the circulation chamber 311 to reduce the fluid accumulated in the second accommodating chamber 202 and reduce damage to the electrical structure 50; at the same time, the temporary storage of fluid in the circulation chamber 311 can also increase the pressure of the fluid on the valve core 32.

[0136] The valve core 32 refers to a structure in the one-way valve 30 for controlling the opening or closing of the one-way valve 30. The valve core 32 may include a plate-like structure, a columnar structure, or a structure of other shapes. The material of the valve core 32 may include metal, plastic, or other materials.

[0137] The valve core 32 can be movably provided on the valve body 31, and the movement of the valve core 32 relative to the valve body 31 can open or close the first flow channel 312 and / or the second flow channel 313, that is, the movement of the valve core 32 can control the opening or closing of the one-way valve 30; the movement of the valve core 32 can only open or close the first flow channel 312 or the second flow channel 313, or can open or close the first flow channel 312 and the second flow channel 313 at the same time.

[0138] For example, the valve core 32 can be set on one side of the first flow channel 312 so that the valve core 32 can move to open or close the first flow channel 312; the valve core 32 can move relative to the valve body 31 along the axial direction of the first flow channel 312, and can also move relative to the valve body 31 along the radial direction of the first flow channel 312. The valve core 32 can also have other moving directions to open or close the first flow channel 312; for example, the valve core 32 can also be set on one side of the second flow channel 313 so that the valve core 32 can move to open or close the second flow channel 313; the valve core 32 can move relative to the valve body 31 along the axial direction of the second flow channel 313, and can also move relative to the valve body 31 along the radial direction of the second flow channel 313. The valve core 32 can also have other moving directions to open or close the second flow channel 313; for example, the valve core 32 can also be set in the circulation cavity 311 so that the valve core 32 can move to open or close the first flow channel 312 and the second flow channel 313 at the same time.

[0139] The valve core 32 can be driven by fluid to move, or the movement of the valve core 32 can be controlled by a controller, which can include an electric cylinder, a pneumatic cylinder, or other structures. For example, when fluid is generated in the second accommodating chamber 202, the fluid in the second accommodating chamber 202 can push the valve core 32 to move to open the one-way valve 30, thereby allowing the fluid to flow from the second accommodating chamber 202 to the first accommodating chamber 201. When fluid is generated in the first accommodating chamber 201, the fluid in the first accommodating chamber 201 can push the valve core 32 to move to close the one-way valve 30, thereby making it difficult for the fluid to flow from the first accommodating chamber 201 to the second accommodating chamber 202. For example, when the valve core 32 is controlled by a controller, the controller can include sensors respectively provided in the first accommodating chamber 201 and the second accommodating chamber 202, the sensors being used to detect the fluid conditions in the first accommodating chamber 201 and the second accommodating chamber 202. The controller can control the movement of the valve core 32 based on the detection information of the sensors to open or close the one-way valve 30.

[0140] This embodiment provides some structures of the one-way valve 30 so that the valve core 32 of the one-way valve 30 can move relative to the valve body 31, so that the valve core 32 can open or close the one-way valve 30, thereby realizing the one-way valve 30 to control the flow direction of the fluid.

[0141] refer to Figures 7 to 9 In some embodiments, the valve body 31 also includes a sealing surface 314 facing the first accommodating chamber 201, and one end of the first flow channel 312 connected to the first accommodating chamber 201 is located on the sealing surface 314; the valve core 32 includes a sealing portion 321, which is movably connected to the valve body 31, and the sealing portion 321 can be pressed against the sealing surface 314 to close the first flow channel 312.

[0142] The sealing surface 314 refers to the surface of the valve body 31 facing the first accommodating chamber 201; the sealing surface 314 can be a flat surface or a curved surface; the shape of the sealing surface 314 can be square, circular or other shapes, and the shape of the sealing surface 314 can be set according to the shape of the valve body 31.

[0143] The sealing portion 321 refers to a structure in the valve core 32 used to close the first flow channel 312; the sealing portion 321 can be a plate-like structure, or a columnar structure or other structure; the sealing portion 321 is movably provided on the valve body 31. Since the sealing portion 321 is used to close the first flow channel 312, the sealing portion 321 can move along the radial direction of the first flow channel 312, can move along the axial direction of the first flow channel 312, and can also move along other directions.

[0144] It can be understood that according to the movement direction of the sealing part 321, a guide structure such as a slide groove or a slide rail can be set on the valve body 31 to limit the displacement of the sealing part 321, so that the sealing part 321 can move relative to the valve body 31 and is not easy to fall and cause the one-way valve 30 to fail.

[0145] One end of the first flow channel 312 connected to the first accommodating chamber 201 is located on the sealing surface 314, and the sealing portion 321 can move relative to the valve body 31 and abut against the sealing surface 314 to close the first flow channel 312. At this time, the fluid in the first accommodating chamber 201 is blocked by the sealing portion 321 and is difficult to enter the first flow channel 312; the sealing portion 321 can move relative to the valve body 31 and be spaced apart from the sealing surface 314. The sealing portion 321 can move relative to the valve body 31 and can intersect with the first flow channel 312 at one end of the sealing surface 314 to open the first flow channel 312. At this time, the fluid in the second accommodating chamber 202 can flow into the first accommodating chamber 201 through the second flow channel 313, the circulation chamber 311 and the first flow channel 312.

[0146] Because the sealing surface 314 is located on the side of the valve body 31 facing the first accommodating chamber 201, and the sealing portion 321 is pressed against the sealing surface 314, the sealing portion 321 is located outside the circulation chamber 311 and on the side of the sealing surface 314 facing the first accommodating chamber 201; at this time, the fluid in the first accommodating chamber 201 flows toward the first flow channel 312, which will push the sealing portion 321 to press against the sealing surface 314, so that the fluid in the first accommodating chamber 201 is not easy to enter the first flow channel 312, and after the fluid in the second accommodating chamber 202 flows into the first flow channel 312 through the second flow channel 313 and the circulation chamber 311, the fluid can push the sealing portion 321 to move away from the sealing surface 314 to open the first flow channel 312, so that the fluid can enter the first accommodating chamber 201.

[0147] For example, in the event of thermal runaway of the battery cell 10 in the first accommodating cavity 201, the high-temperature and high-pressure flue gas generated by the thermal runaway can push the sealing portion 321 against the sealing surface 314, thereby preventing the high-temperature and high-pressure flue gas from entering the first flow channel 312; in the event of coolant leakage in the second accommodating cavity 202, the coolant can flow into the first flow channel 312 through the second flow channel 313 and the circulation cavity 311, and the coolant in the first flow channel 312 can push open the sealing portion 321 and separate the sealing portion 321 from the sealing surface 314, thereby allowing the coolant to enter the first accommodating cavity 201.

[0148] It can be understood that the shape of the side of the sealing portion 321 opposite to the sealing surface 314 matches the shape of the sealing surface 314, so that the sealing portion 321 can better fit the sealing surface 314, thereby improving the sealing effect of the sealing portion 321 and reducing the overflow of fluid from between the sealing portion 321 and the sealing surface 314.

[0149] In this embodiment, the valve body 31 includes a sealing surface 314 facing the first accommodating chamber 201, and the valve core 32 includes a sealing portion 321, so that the sealing portion 321 can abut against the sealing surface 314 to close the first flow channel 312, thereby achieving the effect of closing the one-way valve 30; in the event of thermal runaway of the battery cell 10 in the first accommodating chamber 201, the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery cell 10 can infer that the sealing portion 321 abuts against the sealing surface 314, causing the one-way valve 30 to close, thereby preventing the high-temperature and high-pressure flue gas from entering the second accommodating chamber 202; at the same time, in the event of fluid leakage in the second accommodating chamber 202, the leaked fluid can enter the circulation chamber 311 through the second flow channel 313, and can push the sealing portion 321 away from the sealing surface 314, so that the fluid in the second accommodating chamber 202 is discharged to the first accommodating chamber 201.

[0150] refer to Figures 7 to 9 In some embodiments, a limiting structure 315 is provided on the valve body 31, and a limiting hole 3151 connected to the flow cavity 311 is opened on the limiting structure 315; the valve core 32 also includes a limiting portion 322, and the limiting portion 322 is connected to the sealing portion 321 through the connecting portion 323. The limiting portion 322 and the sealing portion 321 are respectively located on both sides of the limiting structure 315, and the maximum width of the limiting portion 322 is greater than the inner diameter of the limiting hole 3151.

[0151] The limiting structure 315 refers to a structure provided in the valve body 31 for limiting the displacement of the valve core 32. The limiting structure 315 can be an independent structure and connected to the valve body 31, or the limiting structure 315 can be a part of the valve body 31 and be integrally formed with the valve body 31; the limiting structure 315 can be located on the outer wall of the valve body 31, or it can be located inside the valve body 31, for example, the limiting structure 315 can also be located in the flow cavity 311; the limiting structure 315 can be a plate-like structure, or it can be a block-like structure or a structure of other shapes; the material of the limiting structure 315 can include metal, plastic or other materials, and the material of the limiting structure 315 can be the same as or different from the material of the valve body 31.

[0152] The limiting hole 3151 refers to a hole structure opened on the limiting structure 315. The limiting hole 3151 can be a square hole, a round hole or a hole structure of other shapes. The limiting hole 3151 can be a straight hole, a stepped hole, a conical hole or a hole structure of other shapes; the limiting hole 3151 and the first flow channel 312 can be located on different sides of the flow cavity 311, or on the same side of the flow cavity 311.

[0153] The limiting portion 322 refers to a structure in the valve core 32 that limits the displacement of the valve core 32. The limiting portion 322 is located on the side of the flow cavity 311 having the limiting structure 315; the shape of the limiting portion 322 can be cylindrical, plate-shaped, truncated cone-shaped or other shapes; the material of the limiting portion 322 can include metal, plastic or other materials.

[0154] The connecting portion 323 refers to a structure in the valve core 32 used to connect the limiting portion 322 and the sealing portion 321, that is, the two ends of the connecting portion 323 can be connected to the limiting portion 322 and the sealing portion 321 respectively; the connecting portion 323 can be a flexible component such as a rope, or it can be a rigid structure such as a cylindrical structure, a prismatic structure or other shapes; the connecting portion 323 and the limiting portion 322, the connecting portion 323 and the sealing portion 321 can be made into one piece, or can be connected by bonding, screwing or other means; the material of the connecting portion 323 can include metal, plastic or other materials.

[0155] The limiting portion 322 and the sealing portion 321 are respectively located on both sides of the limiting structure 315, so that the movement of the sealing portion 321 can drive the limiting portion 322 to move synchronously through the connecting portion 323, and the limiting portion 322 will abut against the limiting structure 315 after moving a certain distance, thereby limiting the further movement of the sealing portion 321.

[0156] For example, the limiting structure 315 can be a part of the valve body 31 and is provided on the side of the valve body 31 facing the second accommodating chamber 202. In this case, the limiting portion 322 can be located outside the valve body 31 and located in the second accommodating chamber 202. The connecting portion 323 can pass through the limiting hole 3151, the flow chamber 311 and the first flow channel 312 to connect the limiting portion 322 and the sealing portion 321. One end of the connecting portion 323 is connected to the limiting portion 322 outside the valve body 31, and the other end of the connecting portion 323 can pass through the limiting hole 3151, the flow chamber 311 and the first flow channel 312 in sequence. 1 and the first flow channel 312 and are connected to the sealing portion 321; further, the other end of the limiting hole 3151 is connected to the second accommodating chamber 202, so that the fluid in the first accommodating chamber 201 can only enter the circulation chamber 311 through the first fluid, and is difficult to enter the circulation chamber 311 through the limiting hole 3151; at the same time, the fluid in the second accommodating chamber 202 can enter the circulation chamber 311 through the second flow channel 313, and can also enter the circulation chamber 311 through the limiting hole 3151, so as to facilitate faster discharge of the fluid in the second accommodating chamber 202.

[0157] For example, the limiting structure 315 can also be an independent component and be located inside the circulation cavity 311. In this case, the limiting portion 322 can be located inside the circulation cavity 311, and the connecting portion 323 can pass through the limiting hole 3151, part of the circulation cavity 311 and the first flow channel 312 to connect the limiting portion 322 and the sealing portion 321; one end of the connecting portion 323 is connected to the limiting portion 322 in the circulation cavity 311, and the other end of the connecting portion 323 can pass through the limiting hole 3151, part of the circulation cavity 311 and the first flow channel 312 in sequence and be connected to the sealing portion 321.

[0158] The maximum width of the limiting portion 322 is greater than the inner diameter of the limiting hole 3151, so that the limiting portion 322 is difficult to enter the limiting hole 3151; at this time, under the action of the limiting portion 322 and the connecting portion 323, the sealing portion 321 is not easy to separate from the valve body 31 and fall off, thereby improving the stability of the one-way valve 30.

[0159] When fluid (such as coolant) appears in the second accommodating chamber 202, the fluid pushes the sealing portion 321 to separate from the sealing surface 314 through the second flow channel 313, the circulation chamber 311 and the first flow channel 312; at this time, the sealing portion 321 pulls the limiting portion 322 to press against the limiting structure 315 through the connecting portion 323, so that the sealing portion 321 is not easily separated from the valve body 31 and falls off.

[0160] When fluid (such as high-temperature and high-pressure flue gas) appears in the first accommodating chamber 201, the fluid can press the sealing part 321 against the sealing surface 314 and close the first flow channel 312; at this time, if the connecting part 323 is a rigid structural part, the sealing part 321 can also push the limiting part 322 to leave the limiting structure 315 through the connecting part 323; if the connecting part 323 is a flexible structural part, the sealing part 321 is not likely to affect the position of the limiting part 322.

[0161] In this embodiment, the valve core 32 includes a limiting portion 322 to limit the displacement of the sealing portion 321 so that the sealing portion 321 is not easily separated from the valve body 31 and falls off, thereby improving the stability of the one-way valve 30.

[0162] refer to Figures 7 to 9 In some embodiments, the limiting hole 3151 is located on the side of the circulation cavity 311 facing the second accommodating cavity 202 , and the sealing surface 314 is located on the side of the circulation cavity 311 facing the first accommodating cavity 201 .

[0163] The sealing surface 314 is located on the side of the circulation chamber 311 facing the first accommodating chamber 201, that is, the first flow channel 312 is also located on the side of the circulation chamber 311 facing the first accommodating chamber 201, and the limiting hole 3151 is located on the side of the circulation chamber 311 facing the second accommodating chamber 202; when the fluid in the second accommodating chamber 202 enters the circulation chamber 311 and pushes the sealing part 321 to separate from the sealing surface 314, the limiting part 322 can better limit the displacement of the sealing surface 314 through the connecting part 323, thereby making it more difficult for the sealing part 321 to separate from the valve body 31.

[0164] For example, when the second accommodating chamber 202 is located above the first accommodating chamber 201 in the direction of gravity, the sealing surface 31 can be located below the circulation chamber 311 in the direction of gravity, that is, the first flow channel 312 is also located below the circulation chamber 311, and the limiting hole 3151 can be located above the circulation chamber 311 in the direction of gravity, so that the sealing part 321 is difficult to separate from the valve body 31 when it separates from the sealing surface 314 under the action of gravity or the fluid in the first accommodating chamber 201.

[0165] This embodiment specifically provides some positional relationships between the limiting holes 3151 and the sealing surface 314. Since the limiting portion 322 is opposite to the limiting hole 3151, and the sealing portion 321 is opposite to the sealing surface 314, this setting also limits the relationship between the limiting portion 322 and the sealing portion 321, so that the limiting portion 322 can better limit the displacement of the sealing portion 321, thereby better improving the stability of the one-way valve 30.

[0166] refer to Figures 7 to 9 In some embodiments, a guide groove 33 is provided on the side of the valve body 31 facing the first accommodating chamber 201, and the sealing portion 321 is accommodated in the guide groove 33; at least one third through hole 3211 is opened on the sealing portion 321, and in the moving direction of the valve core 32, the third through hole 3211 is opposite to the sealing surface 314.

[0167] The guide groove 33 refers to a groove structure provided on the valve body 31, and the guide groove 33 is used to guide the moving direction of the sealing part 321; the guide groove 33 is provided on the side of the valve body 31 facing the first accommodating cavity 201, and the sealing surface 314 can be the bottom surface of the guide groove 33; the guide groove 33 can be a square groove, a circular groove or a groove structure of other shapes.

[0168] The axial direction of the guide groove 33 is consistent with the moving direction of the sealing portion 321 , so that the sealing portion 321 can move along the axial direction of the guide groove 33 ; for example, the axial direction of the guide groove 33 can be parallel to the direction of gravity and perpendicular to the sealing surface 314 .

[0169] The third through hole 3211 refers to a hole structure opened on the sealing part 321. The number of the third through hole 3211 can be one, two or more; the third through hole 3211 can be a square hole, a circular hole or a hole structure of other shapes. The third through hole 3211 can be a straight hole, a stepped hole, a conical hole or a hole structure of other shapes.

[0170] The third through hole 3211 is used to allow fluid to flow through when the sealing portion 321 is separated from the sealing surface 314, so that the fluid can be discharged from the second accommodating chamber 202 more quickly; the third through hole 3211 is opposite to the sealing surface 314, and when the sealing portion 321 is against the sealing surface 314, when there are multiple third through holes 3211, the multiple third through holes 3211 are all opposite to the sealing surface 314. This arrangement can close the third through hole 3211 through the sealing surface 314, so that it is difficult for the fluid to flow into the first flow channel 312 through the third through hole 3211, thereby enabling the sealing portion 321 to close the first flow channel 312.

[0171] Since the guide groove 33 is used to guide the movement direction of the sealing portion 321, the side wall of the sealing portion 321 should be against the inner wall of the guide groove 33, or the gap between the side wall of the sealing portion 321 and the inner wall of the guide groove 33 is small. At this time, when the sealing portion 321 is separated from the sealing surface 314, the efficiency of fluid discharge from the circulation cavity 311 is low.

[0172] Accordingly, in this embodiment, a third through hole 3211 is provided on the sealing portion 321. When the sealing portion 321 is separated from the sealing surface 314, the fluid can flow from the circulation cavity 311 through the third through hole 3211, so as to facilitate the fluid to flow from the second accommodating cavity 202 to the first accommodating cavity 201. At the same time, the third through hole 3211 is made opposite to the sealing surface 314. When the sealing portion 321 is abutted against the sealing surface 314, the sealing surface 314 can close the third through hole 3211 to prevent the fluid from entering the third through hole 3211 from the circulation cavity 311, thereby improving the sealing performance of the one-way valve 30.

[0173] refer to Figures 7 to 9 In some embodiments, a sealing member 34 surrounding one end of the first flow channel 312 is provided on the side of the sealing surface 314 facing the first accommodating cavity 201 , and the sealing portion 321 can be supported by the sealing member 34 .

[0174] The seal 34 refers to a structure used to fill the gap between the sealing surface 314 and the sealing portion 321 when the sealing portion 321 is abutted against the sealing surface 314. The seal 34 surrounds one end of the first flow channel 312, that is, the seal 34 surrounds one end of the first flow channel 312 on the sealing surface 314; when the sealing portion 321 is abutted against the sealing surface 314, the sealing portion 321 can also abut against the seal 34. At this time, a space isolated from the first accommodating cavity 201 can be formed between the sealing surface 314, the seal 34 and the sealing portion 321 to improve the sealing performance of the seal 321.

[0175] When the sealing portion 321 is pressed against the sealing member 34, the sealing member 34 may be deformed to better fill the gap between the sealing portion 321 and the sealing member 34 and between the sealing member 34 and the sealing surface 314, thereby improving the sealing performance; accordingly, the material of the sealing member 34 may include rubber or other elastic materials.

[0176] The sealing member 34 surrounds one end of the first flow channel 312 located on the sealing surface 314 , so the sealing member 34 may be a circular ring structure, or a square ring structure or other ring structures.

[0177] The sealing member 34 may be fixedly connected to the sealing surface 314 by welding, bonding, or the like, or may be detachably connected to the sealing surface 314 by screwing, snapping, or other means.

[0178] In this embodiment, a sealing member 34 is provided on the sealing surface 314 to further improve the sealing performance of the sealing portion 321 against the sealing surface 314 .

[0179] refer to Figures 7 to 9 In some embodiments, the one-way valve 30 includes a first natural state, and the sealing portion 321 opens the first flow channel 312 in the first natural state.

[0180] The first natural state refers to the state in which the one-way valve 30 is in when it is not subject to pressure from the fluid in the first accommodating chamber 201 and the fluid in the second accommodating chamber 202. The one-way valve 30 can be in the first natural state when the battery device 100 is in a non-working or normal working state.

[0181] When the one-way valve 30 is in the first natural state, the sealing portion 321 is separated from the sealing surface 314 under the action of its own weight, and the sealing portion 321 pulls the limiting portion 322 to press against the valve body 31 through the connecting portion 323; the first flow channel 312 is in the open state, at this time the first accommodating chamber 201 and the second accommodating chamber 202 are connected to each other, so that the fluid in the second accommodating chamber 202 can be discharged into the first accommodating chamber 201 more quickly.

[0182] When high-temperature and high-pressure flue gas appears in the first accommodating chamber 201 , the one-way valve 30 is no longer in the first natural state. The high-temperature and high-pressure flue gas can press the sealing portion 321 against the sealing surface 314 and close the first flow channel 312 .

[0183] In this embodiment, the one-way valve 30 is naturally open due to its own weight, so that the one-way valve 30 can be closed when the battery cell 10 thermally runs away and produces high-temperature and high-pressure flue gas, and the structure of the one-way valve 30 is simplified.

[0184] refer to Figure 7 、 Figure 10 、 Figure 11 In some embodiments, the one-way valve 30 further includes an elastic member 35 , one end of the elastic member 35 is connected to the valve core 32 , and the other end is connected to the valve body 31 , and the deformation direction of the elastic member 35 is the same as the movement direction of the valve body 31 .

[0185] The elastic member 35 refers to an elastic component in the valve body 31 . The elastic member 35 may be a spring, an elastic rubber column, or other elastic components.

[0186] One end of the elastic member 35 is connected to the valve core 32, and the other end is connected to the valve body 31; when the elastic member 35 includes a sealing portion 321, one end of the elastic member 35 can be connected to the sealing portion 321; the end of the elastic member 35 connected to the valve body 31 can be connected to the outer wall surface of the valve body 31, and at this time the elastic member 35 is located outside the valve body 31, and the end of the elastic member 35 connected to the valve body 31 can also be connected to the inner wall of the circulation cavity 311, and at this time at least part of the elastic member 35 is located in the circulation cavity 311.

[0187] For example, when the elastic member 35 includes the limiting portion 322 , the elastic member 35 may also be disposed between the limiting portion 322 and the outer wall of the valve body 31 .

[0188] The deformation direction of the elastic member 35 is the same as the movement direction of the valve body 31, that is, the elastic member 35 is used to restore the valve body 31 to its original position after the valve body 31 moves. When the battery device 100 is in a non-operating or normal working state, the one-way valve 30 can be in an open state. At this time, the elastic member 35 can apply a force to the sealing portion 321 in a direction away from the sealing surface 314, and cause the sealing portion 321 to separate from the sealing surface 314, so that the first flow channel 312 is in an open state. When the battery device 100 is in a non-operating or normal working state, the one-way valve 30 can also be in a closed state. At this time, the elastic member 35 can apply a force to the sealing portion 321 in a direction toward the sealing surface 314, and cause the sealing portion 321 to abut against the sealing surface 314, so that the first flow channel 312 is in a closed state.

[0189] For example, taking the case where the battery device 100 is in a non-working or normal working state and the one-way valve 30 is in a closed state, when fluid (such as coolant) appears in the second accommodating chamber 202, the fluid can push the sealing portion 321 to move in a direction away from the sealing surface 314, so that the first flow channel 312 is in an open state, and the elastic member 35 is stretched at this time; when the fluid in the second accommodating chamber 202 is discharged, the elastic member 35 restores its length and makes the sealing portion 321 rest against the sealing surface 314 again to close the first flow channel 312; it can be understood that at this time, the fluid pressure required to open the one-way valve 30 can also be set by adjusting the stiffness coefficient of the elastic member 35.

[0190] For example, taking the case where the battery device 100 is in an inoperative or normal operating state and the one-way valve 30 is in an open state, when fluid (such as high-temperature and high-pressure flue gas) appears in the first accommodating chamber 201, the fluid can press the sealing portion 321 against the sealing surface 314 and close the first flow channel 312. At this time, the elastic member 35 is compressed; when the fluid in the first accommodating chamber 201 is discharged, the elastic member 35 restores its length and separates the sealing portion 321 from the sealing surface 314 to open the first flow channel 312; it can be understood that at this time, the fluid pressure required to close the one-way valve 30 can also be set by adjusting the stiffness coefficient of the elastic member 35.

[0191] In this embodiment, an elastic member 35 is provided so as to control the position of the valve body 31 in the natural state through the elastic member 35; at the same time, the pressure conditions required for opening or closing the one-way valve 30 are changed by adjusting the stiffness coefficient of the elastic member 35 to meet the requirements of different working conditions.

[0192] refer to Figure 7 、 Figure 10 、 Figure 11 In some embodiments, the fluid entering the circulation cavity 311 from the second accommodating cavity 202 is a liquid; the one-way valve 30 also includes an expansion member 36 accommodated in the circulation cavity 311, and the expansion member 36 is configured to expand when soaked in liquid so that the sealing portion 321 is pressed against the inner wall of the circulation cavity 311 and the sealing portion 321; the elastic member 35 is configured to apply a force to the sealing portion 321 pointing in the direction of the sealing surface 314 so as to press against the sealing surface 314, and the force applied by the elastic member 35 to the sealing portion 321 is less than the expansion force of the expansion member 36.

[0193] The expansion member 36 refers to a component in the one-way valve 30 that can expand when encountering liquid. The material of the expansion member 36 may include a water-absorbing resin or other components that can absorb liquid and expand.

[0194] The expansion member 36 is arranged in the circulation cavity 311. When liquid enters the circulation cavity 311, the expansion member 36 is soaked in the liquid and can expand, so that the expansion member 36 can be against the inner wall of the circulation cavity 311 and the sealing part 321, and the expansion member 36 continues to expand to push the sealing part 321 away from the sealing surface 314 to open the first flow channel 312, thereby making the one-way valve 30 in an open state; it can be understood that in a state without water absorption, the expansion member 36 can only be connected to the inner wall of the circulation cavity 311 or the sealing part 321.

[0195] The elastic member 35 is configured to apply a force toward the sealing surface 314 to the sealing portion 321 so that the sealing portion 321 can abut against the sealing surface 314 , thereby closing the one-way valve 30 when the battery device 100 is in an idle or normal working state.

[0196] The force applied by the elastic member 35 to the sealing portion 321 is smaller than the expansion force of the expansion member 36 , so that the expansion member 36 can push the sealing portion 321 away from the sealing surface 314 after being soaked in liquid and expanded.

[0197] When liquid appears in the second accommodating chamber 202, the liquid can enter the circulation chamber 311 through the second flow channel 313. Since the sealing portion 321 closes the first flow channel 312, the liquid can infiltrate the expansion member 36; after being infiltrated by the liquid, the expansion member 36 expands and pushes the sealing member 34 away from the sealing surface 314 to open the first flow channel 312. At this time, the fluid can be discharged through the first flow channel 312.

[0198] Depending on the material of the expansion member 36, the expansion member 36 may retract after drying or may not retract further; because liquid is unlikely to appear in the second accommodating chamber 202 under normal circumstances, that is, the presence of liquid in the second accommodating chamber 202 usually means that the battery device 100 is faulty and requires maintenance, and the expansion member 36 or the entire one-way valve 30 can be replaced during the maintenance process, so the expansion member 36 may retract after drying or may not retract further.

[0199] In this embodiment, an expansion body is provided. When liquid leakage occurs in the second accommodating chamber 202, the leaked liquid can cause the expansion body to expand and the sealing portion 321 to separate from the sealing surface 314, so as to facilitate the discharge of the liquid in the second accommodating chamber 202; at the same time, when there is no liquid leakage in the second accommodating chamber 202, the elastic member 35 can cause the sealing portion 321 to press against the sealing surface 314, so as to separate the first accommodating chamber 201 and the second accommodating chamber 202, thereby reducing the mutual influence between the two.

[0200] refer to Figure 7 、 Figure 10 、 Figure 11In some embodiments, the one-way valve 30 includes a second natural state, the sealing portion 321 closes the first flow channel 312 in the second natural state, and the sealing portion 321 abuts against the sealing surface 314 .

[0201] The second natural state refers to the state in which the one-way valve 30 is in when it is not subject to pressure from the fluid in the first accommodating chamber 201 and the fluid in the second accommodating chamber 202. The one-way valve 30 can be in the second natural state when the battery device 100 is in a non-working or normal working state.

[0202] When the one-way valve 30 is in the second natural state, the sealing portion 321 is pressed against the sealing surface 314 by the elastic member 35, and the first flow channel 312 is in a closed state. At this time, the first accommodating chamber 201 and the second accommodating chamber 202 are separated from each other to reduce the mutual influence between the first accommodating chamber 201 and the second accommodating chamber 202.

[0203] When liquid appears in the second accommodating chamber 202, the one-way valve 30 is no longer in the first natural state, and the liquid can enter the circulation chamber 311 through the second flow channel 313 and can infiltrate the expansion member 36; the expansion member 36 expands after being infiltrated by the liquid and pushes the sealing member 34 away from the sealing surface 314 to open the first flow channel 312. At this time, the fluid can be discharged through the first flow channel 312.

[0204] In this embodiment, the one-way valve 30 is in a closed state under the influence of the elastic member 35 in a natural state, so that the one-way valve 30 can be closed in a natural state to reduce the mutual influence between the first accommodating chamber 201 and the second accommodating chamber, and can also be opened in the event of liquid leakage in the second accommodating chamber 202 to facilitate the discharge of liquid from the second accommodating chamber 202, thereby reducing damage to the electrical structure 50.

[0205] refer to Figures 7 to 12 In some embodiments, the valve body 31 includes a valve body main body 316 and a fixing member 317. The valve body main body 316 includes a base 3161 and a fixing portion 3162 connected to the base 3161. The base 3161 is located in the first accommodating cavity 201, and the fixing portion 3162 passes through the upper box body 21 and is located in the second accommodating cavity 202; the fixing member 317 is connected to the fixing portion 3162, and a portion of the upper box body 21 is clamped between the fixing member 317 and the base 3161.

[0206] The valve body main body 316 refers to the structure in the valve body 31 that is mainly used to provide a carrier for the structure of the one-way valve 30. The flow cavity 311, the first flow channel 312, the second flow channel 313, and the limiting hole 3151 can all be arranged in the valve body main body 316; the shape of the valve body main body 316 can be cylindrical, prismatic or other regular or irregular shapes; the material of the valve body main body 316 can include metal, plastic or other materials.

[0207] The fixing member 317 refers to a structure for fixing the valve body 316 on the upper box body 21; the material of the fixing member 317 may include metal, plastic or other materials.

[0208] The base 3161 refers to the structure in the valve body main body 316 mainly used to connect with the upper box body 21; the material of the base 3161 can include metal, plastic or other materials.

[0209] The fixing portion 3162 refers to a structure in the valve body main body 316 that is mainly used to provide a fixing foundation for the fixing part 317. The fixing portion 3162 is connected to the base 3161. The fixing portion 3162 can be made into an integral part with the base 3161. The fixing portion 3162 can also be fixedly connected to the base 3161 by welding, bonding or other means. The fixing portion 3162 can also be detachably connected to the base 3161 by screwing, clamping or other means; the material of the fixing portion 3162 may include metal, plastic or other materials, and the material of the fixing portion 3162 may be the same as or different from the material of the base 3161.

[0210] The base 3161 is located in the first accommodating cavity 201, and the base 3161 is located on the side of the upper box body 21 facing the first accommodating cavity 201; the fixing portion 3162 passes through the upper box body 21 from the base 3161, so that at least part of the fixing portion 3162 is located in the second accommodating cavity 202; the fixing member 317 is connected to the fixing portion 3162, and a part of the upper box body 21 is clamped between the fixing member 317 and the base 3161 to fix the one-way valve 30 on the upper box body 21. The fixing member 317 can be fixedly connected to the fixing portion 3162 by welding, bonding or other means, and can also be detachably connected to the fixing portion 3162 by screwing, clamping or other means.

[0211] For example, a through hole is opened on the upper box body 21, and the fixing part 3162 can pass through the through hole from the first accommodating chamber 201. At this time, the base 3161 is located in the first accommodating chamber 201 and is supported on the side of the upper box body 21 facing the first accommodating chamber 201. The fixing part 317 is connected to the part of the fixing part 3162 located in the second accommodating chamber 202, and the fixing part 317 is located in the second accommodating chamber 202. The fixing part 317 is supported on the side of the upper box body 21 facing the second accommodating chamber 202. The part of the upper box body 21 around the through hole is clamped between the fixing part 317 and the base 3161. The fixing part 317 and the base 3161 thereby fix the one-way valve 30 on the upper box body 21.

[0212] It can be understood that, depending on the position of the fixing member 317, a through hole opposite to the second flow channel 313 can be opened on the fixing member 317 so that the fluid in the second accommodating chamber 202 can enter the second flow channel 313; depending on the shape and position of the fixing member 317, other through holes can also be opened on the fixing member 317 to be opposite to the limiting hole 3151 and the first flow channel 312.

[0213] In this embodiment, the valve body 31 includes a valve body main body 316 and a fixing member 317 , so that part of the upper housing 21 is clamped between the valve body main body 316 and the fixing member 317 , thereby fixing the one-way valve 30 on the upper housing 21 .

[0214] refer to Figures 7 to 12 In some embodiments, the outer wall of the fixing portion 3162 is provided with an external thread, and the fixing member 317 is a nut that cooperates with the external thread.

[0215] The external thread covers at least a portion of the outer wall of the fixing portion 3162, the fixing member 317 is a nut, and at least a portion of the fixing member 317 can cooperate with the external thread; at this time, under the action of the external thread, the fixing member 317 can be fixed on the fixing portion 3162, so that the fixing member 317 can be supported on the upper box body 21, and can clamp the upper box body 21 between the base 3161 and the fixing member 317.

[0216] The fixing member 317 is connected to the fixing portion 3162 by threaded engagement, so as to facilitate installation of the fixing member 317 and also facilitate installation, disassembly and replacement of the one-way valve 30 .

[0217] refer to Figure 12 、 Figure 13 In some embodiments, the fixing member 317 is sleeved on the fixing portion 3162, and a sealing groove 3171 is provided on the side of the fixing member 317 facing the base 3161; a protrusion 3163 is provided on the side of the base 3161 facing the fixing member 317, and the protrusion 3163 is accommodated in the sealing groove 3171, and the protrusion 3163 is supported on the inner wall of the sealing groove 3171.

[0218] The fixing member 317 is sleeved on the fixing portion 3162, that is, the fixing member 317 is arranged around the fixing portion 3162, and the fixing portion 3162 passes through the fixing member 317; a sealing groove 3171 is opened on the side of the fixing member 317 facing the base 3161, and the sealing groove 3171 can be a square groove, a semicircular groove, a trapezoidal groove or a groove of other shapes.

[0219] The raised portion 3163 refers to a raised structure mainly used to cooperate with the sealing groove 3171. The raised portion 3163 is located on the side of the base 3161 facing the sealing groove 3171, and the raised portion 3163 protrudes from the base 3161 to the inside of the sealing groove 3171, so that the raised portion 3163 can be accommodated in the sealing groove 3171; the raised portion 3163 can be made as one piece with the base 3161, and the raised portion 3163 can also be fixedly connected to the base 3161 by welding, bonding or other means. The raised portion 3163 can also be detachably connected to the base 3161 by screwing, clamping or other means; the material of the raised portion 3163 can include metal, plastic or other materials, and the material of the raised portion 3163 can be the same as or different from the material of the base 3161.

[0220] The protrusion 3163 can abut against the inner wall of the sealing groove 3171 to improve the sealing performance between the protrusion 3163 and the sealing groove 3171 . For example, the protrusion 3163 can be a part of the valve body 316 and be integrally formed with the base 3161. In this case, the protrusion 3163 is a rigid structure and is made of the same material as the base 3161. The protrusion 3163 abuts against the inner wall of the sealing groove 3171 to improve the sealing performance between the protrusion 3163 and the sealing groove 3171; for example, the protrusion 3163 can also be an independent structure. In this case, the protrusion 3163 can be a structure similar to a sealing rubber ring, a sealing metal gasket, etc. The opposite ends of the protrusion 3163 respectively abut against the inner wall of the sealing groove 3171 and the base 3161, and the protrusion 3163 can be slightly deformed when the fixing member 317 abuts against the base 3161, so as to better improve the sealing performance between the protrusion 3163 and the sealing groove 3171, and the protrusion 3163 and the base 3161; it is understandable that the protrusion 3163 can also be other structures, not limited to the above two types.

[0221] Because the fixing piece 317 is sleeved on the fixing portion 3162, the sealing groove 3171 can surround the fixing portion 3162, and because the protrusion 3163 cooperates with the sealing groove 3171, the protrusion 3163 can also surround the fixing portion 3162; at this time, under the action of the sealing groove 3171 and the protrusion 3163 surrounding the fixing portion 3162, the sealing performance between the fixing piece 317 and the upper box body 21, and between the base 3161 and the upper box body 21 can be improved, so that the fluid in the first accommodating chamber 201 is not easy to enter the second accommodating chamber 202 through the gap between the base 3161 and the upper box body 21, and the fluid in the second accommodating chamber 202 is not easy to enter the first accommodating chamber 201 through the gap between the fixing piece 317 and the upper box body 21.

[0222] In this embodiment, a sealing groove 3171 is provided on the fixing member 317, and a sealing portion 321 is provided on the base 3161, and the sealing portion 321 cooperates with the sealing groove 3171 to better improve the sealing performance of the connection position between the fixing member 317 and the valve body 316, and to improve the sealing performance of the connection position between the valve body 316 and the upper box body 21.

[0223] In some embodiments, the battery device 100 further includes a heat exchange component 60 , which is disposed in the first accommodating cavity 201 and / or the second accommodating cavity 202 .

[0224] The heat exchange component 60 refers to a structure in the battery device 100 for controlling the temperature of the working environment of the battery cell 10 and / or the electrical structure 50; because the battery cell 10 and the electrical structure 50 are prone to generate a large amount of heat during use, which can easily cause the ambient temperature to rise, and the higher ambient temperature can easily cause the efficiency of the battery cell 10 and the electrical structure 50 to decrease, the heat exchange component 60 is mainly used to reduce the temperature in the first accommodating cavity 201 and the second accommodating cavity 202, but under certain working conditions, the heat exchange component 60 can also play a role in increasing the temperature in the first accommodating cavity 201 and the second accommodating cavity 202; the heat exchange component 60 can perform heat exchange with the first accommodating cavity 201 and / or the second accommodating cavity 202 through a flowing heat exchange medium, and the heat exchange medium can be a medium such as gas, liquid, or a gas-liquid mixture.

[0225] When the heat exchange assembly 60 is disposed in the second accommodating chamber 202 and the heat exchange medium leaks, the leaked heat exchange medium can be directly discharged to the space outside the box body 20 through the one-way valve 30 to reduce the negative impact that the leakage of the heat exchange medium may have on the electrical structure 50.

[0226] In this embodiment, a heat exchange component 60 is provided to control the temperature in the first accommodating chamber 201 and / or the second accommodating chamber 202 to improve the working efficiency of the battery cell 10 and the electrical structure 50; at the same time, the one-way valve 30 can reduce the damage that may be caused to the electrical structure 50 by leakage of the heat exchange medium.

[0227] refer to Figure 6 In some embodiments, a drain valve 40 is provided at the bottom of the box body 20 to allow the fluid in the first accommodating chamber 201 to flow out of the lower box body 22.

[0228] The drain valve 40 refers to a structure in the battery device 100 for discharging liquid from the first accommodating chamber 201. The drain valve 40 can be a mechanical drain valve 40 or an electronic drain valve 40. The drain valve 40 can be a straight-through drain valve 40 or a drain valve 40 with a filtering structure.

[0229] The drain valve 40 is arranged at the bottom of the box body 20. This arrangement enables the drain valve 40 to be located at a lower position of the box body 20, so that the fluid in the first accommodating chamber 201 flows to the vicinity of the drain valve 40 and is discharged through the drain valve 40, thereby reducing the accumulation of fluid in the first accommodating chamber 201.

[0230] For example, when the upper box body 21 is located above the lower box body 22 , the drain valve 40 may be located on the lower box body 22 and on a side of the lower box body 22 facing away from the upper box body 21 .

[0231] The drain valve 40 can be completely located in the first accommodating chamber 201 or completely located outside the lower box body 22 . The drain valve 40 can also be partially located in the first accommodating chamber 201 with the other part extending outside the lower box body 22 .

[0232] In this embodiment, a drain valve 40 is provided on the housing 20 so that the fluid in the first accommodating chamber 201 can be discharged outside the housing 20, thereby reducing the damage of the liquid in the first accommodating chamber 201 to the battery cell 10; after the fluid in the second accommodating chamber 202 is discharged from the first accommodating chamber 201 through the one-way valve 30, the fluid can also be discharged outside the housing 20 through the drain valve 40, thereby reducing the accumulation of the fluid discharged from the second accommodating chamber 202 to the first accommodating chamber 201 in the first accommodating chamber 201 and reducing the damage to the battery cell 10.

[0233] refer to Figure 6 In some embodiments, the drain valve 40 is a one-way valve, that is, the fluid in the first accommodating chamber 201 can be discharged to the outside of the box body 20 through the drain valve 40, while impurities outside the box body 20 are difficult to enter the first accommodating chamber 201 through the drain valve 40; this setting enables the drain valve 40 to not only discharge the fluid in the first accommodating chamber 201, but also prevent debris outside the lower box body 22 from entering the lower box body 22, so as to reduce the negative impact of the outside world on the battery cell 10.

[0234] In some embodiments, the box body 20 also includes a guide structure accommodated in the first accommodating chamber 201, one end of the guide structure faces the one-way valve 30, and the other end of the guide structure faces the drain valve 40 to guide the fluid flowing out of the one-way valve 30 to flow to the drain valve 40.

[0235] The guide structure refers to a structure arranged in the first accommodating chamber 201, and the guide structure is used to guide the fluid discharged from the one-way valve 30 to flow to the drain valve 40; depending on the type of fluid, the guide structure can be a pipeline structure or other structure; the guide structure can be directly connected to the box body 20, or it can be indirectly connected to 20 through a structural member and accommodated in the first accommodating chamber 201.

[0236] The end of the guide structure facing the one-way valve 30 can be directly connected to the one-way valve 30 or be spaced apart from the one-way valve 30; the end of the guide structure facing the drain valve 40 can be directly connected to the drain valve 40 or be spaced apart from the drain valve 40.

[0237] The flow guiding structure may bypass each battery cell 10 along the edge of the box body 20 , or leave space between the battery cells 10 for the flow guiding structure to pass through.

[0238] For example, the flow guiding structure is a pipeline provided in the box body 20 , and the fluid discharged from the one-way valve 30 can flow to the drain valve 40 through the pipeline and be discharged to the space outside the box body 20 through the drain valve 40 .

[0239] In this embodiment, a flow guiding structure is provided in the first accommodating chamber 201 so that the fluid discharged from the second accommodating chamber 202 through the one-way valve 30 can flow to the drain valve 40 under the guidance of the flow guiding structure, thereby reducing the possible damage to the battery cell 10 caused by the fluid discharged from the second accommodating chamber 202.

[0240] In some embodiments, the drain valve 40 is disposed opposite to the one-way valve 30 , and an empty space is provided between the drain valve 40 and the one-way valve 30 .

[0241] The drain valve 40 is arranged opposite to the one-way valve 30 so that the fluid discharged from the second accommodating chamber 202 through the one-way valve 30 can flow to the drain valve 40 more quickly and be discharged; for example, when the fluid discharged from the second accommodating chamber 202 through the one-way valve 30 is liquid, this arrangement can better enable the liquid to flow directly to the drain valve 40 more quickly.

[0242] An empty space is provided between the drain valve 40 and the one-way valve 30, that is, no battery cell 10 or other structure is provided between the drain valve 40 and the one-way valve 30, so that the fluid discharged from the second accommodating chamber 202 through the one-way valve 30 is not easy to contact with the battery cell 10 or other structures and cause damage. It can also reduce the obstruction of the battery cell 10 or other structures to the flow of fluid, reduce the time the fluid stays in the first accommodating chamber 201, and thus reduce the risk of the fluid causing damage to the battery cell 10 or other structures.

[0243] The drain valve 40 and the one-way valve 30 can be set at the edge of the box body 20 to reduce the interference that the drain valve 40 and the one-way valve 30 may cause to the arrangement of the battery cells 10; the drain valve 40 and the one-way valve 30 can be set on both sides of the battery cells 10, and the space between the battery cells 10 is left to form an empty space for fluid to pass through.

[0244] In this embodiment, the drain valve 40 and the one-way valve 30 are arranged relative to each other, and there is no other structure between the drain valve 40 and the one-way valve 30, so that the fluid discharged from the second accommodating chamber 202 can be discharged to the outside of the box body 20 more quickly through the drain valve 40, reducing the time that the fluid discharged from the second accommodating chamber 202 stays in the first accommodating chamber 201, and reducing the risk of the fluid discharged from the second accommodating chamber 202 causing damage to the battery cell 10.

[0245] refer to Figure 6 In some embodiments, the battery cell 10 includes an electrode terminal 14, and the battery cell 10 is inverted and accommodated in the first accommodating cavity 201 so that the electrode terminal 14 is located on the side of the battery cell 10 away from the second accommodating cavity 202; the electrode terminal 14 is spaced apart from the inner wall of the opposite box body 20.

[0246] The electrode terminal 14 can be used to electrically connect to the electrode assembly 13 to output or input electrical energy of the battery cell 10; the battery cell 10 is inverted and accommodated in the first accommodation cavity 201, that is, the electrode terminal 14 is located on the side of the battery cell 10 away from the second accommodation cavity 202.

[0247] Since the fluid in the second accommodating chamber 202 can flow into the first accommodating chamber 201 through the one-way valve 30, the electrode terminal 14 is located on the side of the battery cell 10 away from the second accommodating chamber 202 to reduce the occurrence of the fluid from the second accommodating chamber 202 entering the first accommodating chamber 201 falling on the electrode terminal 14, thereby reducing the damage to the battery cell 10 caused by the fluid from the second accommodating chamber 202 entering the first accommodating chamber 201.

[0248] The electrode terminal 14 is spaced apart from the inner wall of the opposite box body 20, that is, there is a gap between the electrode terminal 14 and the inner wall of the opposite box body 20. After the fluid in the second accommodating chamber 202 enters the first accommodating chamber 201, the fluid can fall on the inner wall of the box body 20 and can flow to the drain valve 40 through the gap between the electrode terminal 14 and the inner wall of the opposite box body 20, so as to reduce the situation where the fluid immerses the electrode terminal 14, thereby reducing the damage of the fluid to the battery cell 10.

[0249] For example, when the upper box body 21 is located above the lower box body 22, the electrode terminal 14 faces the bottom wall of the lower box body 22, and there is a gap between the electrode terminal 14 and the bottom wall of the lower box body 22; after the fluid in the second accommodating chamber 202 enters the first accommodating chamber 201, under the shielding of the battery cell 10, the fluid is not likely to fall directly on the electrode terminal 14. After the fluid falls on the bottom wall of the lower box body 22, it can flow to the drain valve 40 through the gap between the electrode terminal 14 and the bottom wall of the lower box body 22 and be discharged outside the box body 20. The fluid is not likely to come into contact with the electrode terminal 14, nor is it likely to immerse the electrode terminal 14, thereby reducing the damage of the fluid to the battery cell 10.

[0250] In this embodiment, the battery cell 10 is inverted to reduce the possibility that the liquid in the second receiving chamber 202 falls onto the battery cell 10 and may cause damage to the battery cell 10 .

[0251] In some embodiments, the battery device 100 includes a box body 20 and a battery cell 10, the box body 20 includes a lower box body 22 and an upper box body 21 covering the lower box body 22, and a shell 23 is also provided above the upper box body 21; the upper box body 21 and the lower box body 22 form a first accommodating cavity 201, the upper box body 21 and the shell 23 form a second accommodating cavity 202, the battery cell 10 is accommodated in the first accommodating cavity 201, and the electrical structure 50 is accommodated in the second accommodating cavity 202.

[0252] A one-way valve 30 is provided on the upper box body 21. Part of the one-way valve 30 is located in the first accommodating chamber 201, and the other is located in the second accommodating chamber 202. The one-way valve 30 can connect the first accommodating chamber 201 and the second accommodating chamber 202, so that the liquid in the second accommodating chamber 202 can flow into the first accommodating chamber 201 through the one-way valve 30, and the gas in the first accommodating chamber 201 is difficult to flow into the second accommodating chamber 202 through the one-way valve 30.

[0253] The one-way valve 30 includes a valve body 31, which includes a valve body main body 316 and a fixing member 317. The valve body main body 316 includes a fixing portion 3162 and a base 3161. The base 3161 is located in the first accommodating cavity 201, and the fixing portion 3162 passes through the upper box body 21 and is located in the second accommodating cavity 202. The fixing member 317 is connected to the fixing portion 3162 and cooperates with the base 3161 to clamp part of the upper box body 21 between the fixing member 317 and the base 3161.

[0254] A circulation chamber 311 is defined in the valve body main body 316, part of the circulation chamber 311 is located in the fixed portion 3162 and the other part is located in the base 3161; a first flow channel 312 is also defined in the valve body main body 316, the first flow channel 312 is located on the base 3161, one end of the first flow channel 312 is connected to the circulation chamber 311, and the other end is connected to the first accommodating chamber 201; a second flow channel 313 is also defined in the valve body main body 316, the second flow channel 313 is located on the fixed portion 3162, one end of the second flow channel 313 is connected to the circulation chamber 311, and the other end is connected to the second accommodating chamber 202; the valve body main body 316 also includes a limiting hole 3151, the limiting hole 3151 is defined on the fixed portion 3162 and located above the circulation chamber 311, one end of the limiting hole 3151 is connected to the circulation chamber 311, and the other end of the limiting hole 3151 is connected to the second accommodating chamber 202.

[0255] The valve core 32 includes a sealing portion 321, a connecting portion 323 and a limiting portion 322; the sealing portion 321 is located below the valve body main body 316 and in the first accommodating chamber 201, and the sealing portion 321 can be abutted against the sealing surface 314 of the valve body 31 to close the first flow channel 312 and close the one-way valve 30, and the sealing portion 321 can also be separated from the sealing surface 314 of the valve body 31 to open the first flow channel 312 and open the one-way valve 30; one end of the connecting portion 323 is connected to the upper side of the sealing portion 321, and the other end of the connecting portion 323 extends through the circulation chamber 311 and the limiting hole 3151 to the second accommodating chamber 202, and is connected to the limiting portion 322; the maximum width of the limiting portion 322 is greater than the inner diameter of the limiting hole 3151, that is, the limiting portion 322 is difficult to enter the limiting hole 3151.

[0256] The battery cell 10 is placed upside down in the first accommodating cavity 201 , with the electrode terminal 14 of the battery cell 10 facing downward and a gap between the electrode terminal 14 and the bottom wall of the lower box body 22 ; a drain valve 40 is also provided on the bottom wall of the lower box body 22 .

[0257] In a second aspect, embodiments of the present application further provide an electrical device, including the battery device 100 provided in some embodiments of the first aspect.

[0258] In this electrical device, liquid leaked from the liquid cooling system into the second accommodating chamber 202 can be discharged to the first accommodating chamber 201 through the one-way valve 30, thereby reducing damage to the electrical structure 50 of the battery device 100 caused by damage to the liquid cooling system, thereby improving the stability of the battery device 100; the high-temperature and high-pressure flue gas generated by the battery cell 10 in the first accommodating chamber 201 during thermal runaway is difficult to enter the second accommodating chamber 202, thereby reducing damage to the electrical structure 50 of the battery device 100 caused by the thermal runaway of the battery cell 10, thereby further improving the stability of the battery device 100.

[0259] In a third aspect, embodiments of the present application further provide a vehicle 1000 , comprising the battery device 100 provided by some embodiments of the first aspect, wherein the top of the box 20 forms at least a portion of the floor of the vehicle 1000 .

[0260] The top of the box 20 can serve as the entire floor of the vehicle 1000 or only as a part of the floor of the vehicle 1000; in this case, the top of the box 20 facing the side of the passenger compartment can be directly used to carry passengers and items, and passengers can step directly on the top of the box 20, and items can also be placed directly on the top of the box 20. 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 in the passenger compartment.

[0261] 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: Battery cells; Electrical structure; A box body, wherein a first accommodating cavity and a second accommodating cavity are provided in the box body, the first accommodating cavity is used to accommodate the battery cell, the second accommodating cavity is used to accommodate the electrical structure, and at least a portion of the second accommodating cavity is located above the first accommodating cavity; A one-way valve is provided on the box body, one end of the one-way valve faces the first accommodating chamber, and the other end of the one-way valve faces the second accommodating chamber. The one-way valve is configured to allow the fluid in the second accommodating chamber to enter the first accommodating chamber, and the one-way valve is also used to prevent the fluid in the first accommodating chamber from entering the second accommodating chamber.

2. The battery device according to claim 1, wherein: The box body includes an upper box body and a lower box body connected to the upper box body, the lower box body is provided with the first accommodating cavity with one end open, and the upper box body covers the open side of the first accommodating cavity; The box body further includes an outer shell, which is arranged on a side of the upper box body away from the lower box body, and a second accommodating cavity is arranged in the outer shell.

3. The battery device according to claim 2, characterized in that The one-way valve includes a valve body connected to the upper box body, a flow cavity and a first flow channel and a second flow channel communicating with the flow cavity are defined in the valve body, the other end of the first flow channel is connected to the first accommodating cavity, and the other end of the second flow channel is connected to the second accommodating cavity; The one-way valve further includes a valve core movably connected to the valve body, and the movement of the valve core can open or close the first flow channel and / or the second flow channel.

4. The battery device according to claim 3, characterized in that The valve body further includes a sealing surface facing the first accommodating cavity, and an end of the first flow channel communicating with the first accommodating cavity is located on the sealing surface; The valve core includes a sealing portion, which is movably connected to the valve body. The sealing portion can abut against the sealing surface to close the first flow channel.

5. The battery device according to claim 4, characterized in that The valve body is provided with a limiting structure, and the limiting structure is provided with a limiting hole communicating with the flow cavity; The valve core also includes a limiting portion, which is connected to the sealing portion through a connecting portion. The limiting portion and the sealing portion are respectively located on both sides of the limiting structure. The maximum width of the limiting portion is greater than the inner diameter of the limiting hole.

6. The battery device according to claim 5, characterized in that The limiting hole is located on a side of the circulation cavity facing the second accommodating cavity, and the sealing surface is located on a side of the circulation cavity facing the first accommodating cavity.

7. The battery device according to claim 5 or 6, characterized in that: A guide groove is provided on a side of the valve body facing the first accommodating chamber, and the sealing portion is accommodated in the guide groove; At least one third through hole is formed on the sealing portion, and in the movable direction of the valve core, the third through hole is opposite to the sealing surface.

8. The battery device according to any one of claims 5 to 7, characterized in that: A sealing member surrounding one end of the first flow channel is provided on the side of the sealing surface facing the first accommodating cavity, and the sealing portion can be supported by the sealing member.

9. The battery device according to any one of claims 4 to 8, characterized in that: The one-way valve includes a first natural state, and the sealing portion opens the first flow channel in the first natural state.

10. The battery device according to any one of claims 4 to 8, characterized in that: The one-way valve further includes an elastic member, one end of which is connected to the valve core, and the other end of which is connected to the valve body. The deformation direction of the elastic member is the same as the movement direction of the valve body.

11. The battery device according to claim 10, characterized in that The fluid entering the circulation cavity from the second accommodating cavity is liquid; The one-way valve further includes an expansion member accommodated in the circulation cavity, wherein the expansion member is configured to expand when soaked in liquid so as to abut against the inner wall of the circulation cavity and the sealing portion; The elastic member is configured to apply a force to the sealing portion in a direction toward the sealing surface so that the sealing portion is held against the sealing surface, and the force applied by the elastic member to the sealing portion is smaller than an expansion force of the expansion member.

12. The battery device according to claim 10 or 11, characterized in that: The one-way valve includes a second natural state. The sealing portion closes the first flow channel in the second natural state, and the sealing portion abuts against the sealing surface.

13. The battery device according to any one of claims 3 to 12, characterized in that: The valve body includes a valve body main body and a fixing member, the valve body main body includes a base and a fixing portion connected to the base, the base is located in the first accommodating cavity, and the fixing portion passes through the upper box and is located in the second accommodating cavity; The fixing member is connected to the fixing portion, and a portion of the upper box body is clamped between the fixing member and the base.

14. The battery device according to claim 13, wherein: The outer wall of the fixing portion is provided with an external thread, and the fixing piece is a nut matched with the external thread.

15. The battery device according to claim 13 or 14, characterized in that: The fixing piece is sleeved on the fixing portion, and a sealing groove is provided on a side of the fixing piece facing the base portion; A protrusion is protruded from one side of the base toward the fixing member. The protrusion is accommodated in the sealing groove and abuts against the inner wall of the sealing groove.

16. The battery device according to any one of claims 1 to 15, characterized in that: The battery device further includes a heat exchange component, which is disposed in the first accommodating cavity and / or the second accommodating cavity.

17. The battery device according to any one of claims 1 to 16, characterized in that: A drain valve is provided at the bottom of the box body, for allowing the fluid in the first accommodating chamber to flow out of the box body.

18. The battery device according to claim 17, characterized in that The drain valve is a one-way valve.

19. The battery device according to claim 17 or 18, characterized in that: The box body also includes a guide structure accommodated in the first accommodating cavity, one end of the guide structure faces the one-way valve, and the other end of the guide structure faces the drain valve to guide the fluid flowing out of the one-way valve to flow to the drain valve.

20. The battery device according to claim 17 or 18, characterized in that: The drain valve and the one-way valve are arranged opposite to each other, and an empty space is provided between the drain valve and the one-way valve.

21. The battery device according to any one of claims 1 to 20, characterized in that: The battery cell includes an electrode terminal, and the battery cell is accommodated in the first accommodation cavity in an inverted manner so that the electrode terminal is located on a side of the battery cell away from the second accommodation cavity; The electrode terminal is spaced apart from the inner wall of the box body.

22. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-21.

23. A vehicle, characterized in that: The battery device according to any one of claims 1 to 21 is comprised, wherein the top of the box forms at least a part of the floor of the vehicle.

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