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 accommodating cavity and a second accommodating cavity are formed in the box body; the one-way valve is connected to the box body, one end of the one-way valve faces the second containing cavity, the other end of the one-way valve faces the space outside the box body, the one-way valve is configured to enable fluid in the second containing cavity to be guided out to the space outside the box body, and the one-way valve is further used for preventing substances in the space outside the box body 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 can be directly discharged out of the box body, and the damage of the fluid leaked from the liquid cooling structure to the electrical structure is reduced; and the one-way valve can prevent impurities outside the box body from entering the second accommodating cavity, so that the damage of the external impurities 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, condensation or liquid leakage or penetration from other structures is easily generated in the compartments for storing battery cells and the compartments for storing electrical structures, which can easily lead 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, which can easily cause 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, and the second accommodating chamber is used to accommodate the electrical structure; a one-way valve is provided on the box body, one end of the one-way valve is connected to the second accommodating chamber, and the other end is connected to the space outside the box body, the one-way valve is used to allow fluid in the second accommodating chamber to enter the space outside the box body, and the one-way valve is also used to prevent substances in the space outside the box body 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; a one-way valve is provided so that the fluid in the second accommodating chamber can be directly discharged outside the box body, 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 impurities outside the box body from entering the second accommodating chamber, thereby reducing the damage caused to the electrical structure by external impurities.

[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] In the technical solution of this embodiment, the upper box body and the lower box body enclose a first accommodating cavity, and the upper box body and the outer shell enclose a second accommodating cavity to respectively accommodate the battery cell and the electrical structure; the first accommodating cavity and the second accommodating cavity 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, and 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.

[0010] In some embodiments, the upper box body includes a misaligned portion formed by being misaligned with the lower box body, and the one-way valve is arranged in the misaligned portion.

[0011] In the technical solution of this embodiment, the upper box body and the lower box body are staggered to form a staggered portion, and the one-way valve is arranged on the staggered portion, so that the fluid discharged to the outside of the box body through the one-way valve is not easily retained on the upper box body; when the fluid is liquid, this arrangement can make it difficult for the liquid discharged from the second accommodating chamber to remain on the upper box body, thereby reducing the risk of battery device failure.

[0012] In some embodiments, the offset portion is closer to the bottom of the lower box body than other positions of the upper box body.

[0013] In the technical solution of this embodiment, the one-way valve is arranged at the offset portion, and the offset portion is made closer to the bottom of the lower box body, so that the fluid can better converge near the one-way valve and be discharged, and the fluid accumulation in the second accommodating chamber can be reduced, thereby better reducing the damage of the fluid to the electrical structure.

[0014] In some embodiments, the box body includes an upper box body, a lower box body, an outer shell and a bottom plate, a first accommodating chamber is formed between the upper box body and the lower box body, the bottom plate is fixed to the upper box body, the outer shell and the bottom plate form a second accommodating chamber, at least part of the bottom plate extends outside the upper box body, and the one-way valve is arranged on the part of the bottom plate extending outside the upper box body.

[0015] The technical solution of this embodiment provides some specific structures of the shell, so that at least part of the bottom plate of the shell can extend outside the upper box body, and a one-way valve is set on the part of the bottom plate extending outside the upper box body, so that the fluid discharged outside the box body through the one-way valve is not easily retained on the upper box body.

[0016] In some embodiments, the base plate includes a connecting portion and an extending portion, the connecting portion is connected to the upper box body, one end of the extending portion is connected to the connecting portion or the upper box body, and the other end of the extending portion extends outside the upper box body; the one-way valve is provided on the extending portion.

[0017] The technical solution of this embodiment further provides some bottom plate structures, so that the bottom plate includes a connecting portion connected to the upper box body, so that the outer shell can be more stably connected to the upper box body; the bottom plate also includes an extension portion extending outside the upper box body, and a one-way valve is provided on the extension portion, so that the fluid discharged outside the box body through the one-way valve is not easily retained on the upper box body.

[0018] In some embodiments, the extension portion protrudes toward the bottom of the lower box body to form a collection trough connected to the second accommodating chamber, and the bottom of the collection trough is closer to the bottom of the lower box body than other positions of the outer shell and the bottom plate; the one-way valve is arranged at the bottom of the collection trough.

[0019] In the technical solution of this embodiment, a collection tank is provided and the bottom of the collection tank is made closer to the bottom of the lower box body, and a one-way valve is provided at the bottom of the collection tank so that the liquid in the second accommodating chamber can better flow into the collection tank, thereby facilitating the discharge of the fluid in the second accommodating chamber through the one-way valve and better reducing the fluid accumulated in the second accommodating chamber.

[0020] In some embodiments, the box body further includes a convex rib provided on the upper box body, the convex rib being located in the second accommodating cavity; the electrical structure is connected to a side of the convex rib facing away from the upper box body, and the electrical structure is spaced apart from the upper box body.

[0021] In the technical solution of this embodiment, the electrical structure is arranged on a convex rib protruding from the upper box body, so that there is a gap between the electrical structure and the bottom of the second accommodating cavity. When fluid is generated in the second accommodating cavity, this arrangement can make it difficult for the electrical structure to come into contact with the fluid accumulated at the bottom of the second accommodating cavity, thereby reducing possible damage to the electrical structure.

[0022] 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.

[0023] In 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 by leakage of the heat exchange medium.

[0024] In some embodiments, the one-way valve includes a valve body connected to the 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 first flow channel is also connected to the space outside the box body, and the second flow channel is also 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.

[0025] 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.

[0026] In some embodiments, the one-way valve also 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, the deformation direction of the elastic member is the same as the movement direction of the valve body, and the elastic member is configured to apply a force to the valve core to close the first flow channel.

[0027] In the technical solution of this embodiment, an elastic part is provided so as to control the position of the valve body in the natural state through the elastic part; at the same time, the pressure conditions required for opening the one-way valve can be changed by adjusting the stiffness coefficient of the elastic part to meet the needs of different working conditions.

[0028] In some embodiments, the fluid entering the flow channel from the second accommodating chamber is 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 and to press against the inner wall of the circulation chamber and the valve core to push the valve core to open the first flow channel; the force applied by the elastic member to the valve core is less than the force applied by the expansion member to the valve core.

[0029] In the technical solution of this embodiment, an expansion piece is provided. When liquid leakage occurs in the second accommodating chamber, the leaked liquid can cause the expansion piece to expand and cause the valve body to open the first flow channel to facilitate the discharge of the liquid in the second accommodating chamber; at the same time, when there is no liquid leakage in the second accommodating chamber, the elastic piece can cause the valve core to close the first flow channel to separate the second accommodating chamber from the space outside the box body, making it difficult for external impurities to enter the second accommodating chamber, thereby reducing the negative impact that external impurities may have on the electrical structure.

[0030] In some embodiments, the valve body also includes a sealing surface facing outside the box body, and one end of the first flow channel 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.

[0031] In the technical solution of this embodiment, the valve body includes a sealing surface facing the outside of the box body, and the valve core includes a sealing portion located outside the circulation cavity, so that the sealing portion can be pressed against the sealing surface to close the first flow channel, thereby achieving the effect of closing the one-way valve; at the same time, in the event of fluid leakage in the second accommodating cavity, the leaked fluid can enter the circulation cavity through the second flow channel, and can push the sealing portion away from the sealing surface, so that the fluid in the second accommodating cavity can be discharged to the space outside the box body.

[0032] In some embodiments, a guide groove is provided on the side of the valve body facing outside the box body, and the sealing part is accommodated in the guide groove; at least one through hole is opened on the sealing part, and the through hole is opposite to the sealing surface in the moving direction of the valve core.

[0033] In the technical solution of this embodiment, a 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 through hole, so that the fluid flows from the second accommodating cavity to the outside. At the same time, the through hole is opposite to the sealing surface. When the sealing portion is against the sealing surface, the sealing surface can close the through hole to prevent external impurities from entering the circulation cavity through the through hole, thereby improving the sealing performance of the one-way valve.

[0034] 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 outside the box body, the fixing part passes through the box body and is located in the second accommodating cavity; the fixing part is connected to the fixing part, and part of the box body is clamped between the fixing part and the base.

[0035] 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 box body is clamped between the valve body main body and the fixing member, thereby fixing the one-way valve on the box body.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] In a second aspect, some embodiments of the present application further provide an electrical device, including the battery device provided in some embodiments of the first aspect.

[0041] 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.

[0042] 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

[0043] 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:

[0044] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0045] Figure 2 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0046] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0047] Figure 4 A schematic cross-sectional view of a battery device provided in some embodiments of the present application;

[0048] Figure 5 Schematic cross-sectional views of battery devices provided in other embodiments of the present application;

[0049] Figure 6 for Figure 5 A partial enlarged schematic diagram of point A in the middle;

[0050] Figure 7 A schematic cross-sectional view of a one-way valve provided in some embodiments of the present application Figure 1 ;

[0051] Figure 8 A schematic cross-sectional view of a one-way valve provided in some embodiments of the present application Figure 2 ;

[0052] Figure 9 A schematic cross-sectional view of a one-way valve provided in some embodiments of the present application Figure 3 ;

[0053] Figure 10 A schematic cross-sectional view of a one-way valve provided in some embodiments of the present application Figure 4 ;

[0054] Figure 11 A schematic cross-sectional view of a valve body in a one-way valve provided in some embodiments of the present application;

[0055] Figure 12 A schematic cross-sectional view of a fixing member in a one-way valve provided in some embodiments of the present application.

[0056] The meanings of the marks in the figure are:

[0057] 1000. Electrical devices;

[0058] 100. Battery device;

[0059] 10. Battery cell; 11. Housing; 12. End cap; 13. Electrode assembly; 14. Electrode terminal;

[0060] 20. Box body; 201. First accommodating chamber; 202. Second accommodating chamber; 21. Upper box body; 211. Displacement portion; 22. Lower box body; 231. Bottom plate; 2311. Connecting portion; 2312. Extending portion; 232. Outer shell; 24. Collecting trough; 25. Raised rib;

[0061] 30. One-way valve; 31. Valve body; 311. Circulation chamber; 312. First flow channel; 313. Second flow channel; 314. Sealing surface; 315. 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. Through hole; 322. Limiting portion; 323. Intermediate portion; 33. Elastic member; 34. Expansion member; 35. Guide groove;

[0062] 40. Electrical structure;

[0063] 50. Connection port;

[0064] 60. Heat exchange components;

[0065] 200, motor;

[0066] 300. Controller. DETAILED DESCRIPTION

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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).

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 device 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.

[0077] 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.

[0078] 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.

[0079] 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; an outer shell is provided and a second accommodating chamber is provided inside the outer shell, and the electrical structure is arranged in the second accommodating chamber, so that the first accommodating chamber and the second accommodating chamber are respectively located on both sides of the upper box body; and a one-way valve is provided on the outer shell so that the coolant in the second accommodating chamber can be discharged outside the box body through the one-way valve.

[0080] 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 outside of the box body, 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 impurities outside the box body from entering the second accommodating chamber, thereby reducing the damage to the electrical structure caused by external impurities.

[0081] 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.

[0082] For the convenience of description, the following embodiments are described by taking an electric device 1000 according to an embodiment of the present application as a vehicle as an example.

[0083] refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 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, and the battery device 100 may be provided at the bottom, head or tail of the vehicle. The battery device 100 may be used to power the vehicle, for example, the battery device 100 may serve as an operating power source for the vehicle. The vehicle 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 during driving.

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

[0085] 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 .

[0086] 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.

[0087] 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.

[0088] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be cylindrical, flat, rectangular, or in other shapes.

[0089] 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.

[0090] 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 components in the housing 11 from the end cap 12 to reduce the risk of short circuit.

[0091] 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.

[0092] 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.

[0093] First, reference Figure 2 、 Figure 4 、 Figure 5 The embodiment of the present application provides a battery device 100, comprising a battery cell 10, an electrical structure 40, 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 40. The one-way valve 30 is connected to the housing 2, with one end of the one-way valve 30 facing the second accommodating chamber 202 and the other end of the one-way valve 30 facing the space outside the housing 20. The one-way valve 30 is configured to allow fluid in the second accommodating chamber 202 to be discharged to the space outside the housing 20. The one-way valve 30 is also used to prevent substances in the space outside the housing 20 from entering the second accommodating chamber 202.

[0094] In the figure, the direction of the X-axis is the length direction of the battery device 100 , the direction of the Y-axis is the width direction of the battery device 100 , and the direction of the Z-axis is the height direction of the battery device 100 .

[0095] 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.

[0096] 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 40 or other structures of the battery cell 10; the box body 20 may include a frame structure, a box-type structure or other structures; the shape of the box body 20 may be a rectangular parallelepiped, cylindrical or other shapes.

[0097] 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.

[0098] The second accommodating cavity 202 is a spatial structure inside the box body 20, and the second accommodating cavity 202 is used to accommodate the electrical structure 40; the second accommodating cavity 202 is surrounded by a partial structure of the box body 20, and 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.

[0099] The second accommodating chamber 202 can be arranged side by side with the first accommodating chamber 201 so that the first accommodating chamber 201 and the second accommodating chamber 202 can be located at approximately the same height; the second accommodating chamber 202 can also be located above the first accommodating chamber 201 along the direction of gravity, the second accommodating chamber 202 can be completely located above the first accommodating chamber 201, the second accommodating chamber 202 can also 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.

[0100] 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.

[0101] The one-way valve 30 is connected to 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; the number of one-way valves 30 can be one, or two or more; one end of the one-way valve 30 faces the second accommodating chamber 202, and the other end of the one-way valve 30 faces the space outside the box body 20. The one-way valve 30 can make the fluid in the second accommodating chamber 202 flow to the space outside the box body 20, and at the same time, the one-way valve 30 can also prevent external impurities from entering the second accommodating chamber 202.

[0102] The space outside the box body 20 is the external space of the box body 20. The fluid in the second accommodating chamber 202 can be discharged to the space outside the box body 20 through the one-way valve 30, that is, the fluid in the second accommodating chamber 202 should not be discharged into the first accommodating chamber 201.

[0103] The one-way valve 30 may be disposed on the peripheral side of the second accommodating chamber 202 or at the bottom of the second accommodating chamber 202 , so as to discharge the fluid in the second accommodating chamber 202 out of the box body 20 .

[0104] 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 40 to short-circuit and cause the electrical structure 40 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 40 to ionize and cause discharge, and the increased air pressure may also cause mechanical damage to the electrical structure 40; 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 40.

[0105] For example, the fluid in the second accommodating chamber 202 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; at this time, 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 be better discharged to the outside of the box body 20 through the one-way valve 30 under the action of gravity.

[0106] Because the second accommodating chamber 202 is typically relatively small, if coolant from the liquid cooling system leaks into the second accommodating chamber 202, the coolant level within the second accommodating chamber 202 can easily rise rapidly and submerge the electrical structure 40. Accordingly, in this embodiment, a one-way valve 30 is provided. The one-way valve 30 facilitates the discharge of fluid from the second accommodating chamber 202 out of the housing 20, thereby reducing damage to the electrical structure 40 caused by fluid leaking from the liquid cooling structure. The one-way valve 30 also prevents impurities outside the housing 20 from entering the second accommodating chamber 202, thereby reducing damage to the electrical structure 40 caused by external impurities.

[0107] refer to Figure 4 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 an open end 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 232, 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 232.

[0108] 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 snapping, screwing or other means.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] The shell 232 refers to a partial structure of the box body 20; the shape of the shell 232 can be prism-shaped, cylindrical, terraced or other shapes; the shell 232 is arranged on the upper box body 21, and the shell 232 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 232 can include metal, plastic or other materials, and the material of the shell 232 can be the same as or different from the material of the upper box body 21.

[0113] The shell 232 is disposed on a side of the upper box body 21 away from the lower box body 22 , that is, the shell 232 is disposed on a side of the upper box body 21 away from the first accommodating chamber 201 , and the shell 232 is located outside the first accommodating chamber 201 .

[0114] The shell 232 can enclose the second accommodating cavity 202 with the upper box body 21, that is, the shell 232 can be a structure with one end open, and the open end of the shell 232 is facing the upper box body 21, so that the second accommodating cavity 202 is enclosed by the upper box body 21 and the shell 232; the second accommodating cavity 202 is used to accommodate the electrical structure 40 of the battery device 100, and the electrical structure 40 includes sensors, relays, connectors, etc. in the battery device 100. The electrical structure 40 also includes a battery device status detection system, a charge and discharge control system, etc. in the battery device 100; the shape of the second accommodating cavity 202 can be a prismatic space, The shape of the second accommodating cavity 202 can also be set according to the shape of the cylindrical space or the space of other shapes, and the shape of the second accommodating cavity 202 can also be set according to the shape of the shell 232; the first accommodating cavity 201 and the second accommodating cavity 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 cavity 201 and the second accommodating cavity 202, thereby reducing the mutual interference between the battery cell 10 and the electrical structure 40. At the same time, arranging the second accommodating cavity 202 outside the first accommodating cavity 201 can also reduce the occupation of the electrical structure 40 on the installation space of the battery cell 10, thereby reducing the negative impact on the energy density of the battery device 100.

[0115] It can be understood that the specific position of the shell 232 on the upper box body 21 can be set according to the structure of the corresponding vehicle to facilitate the rational use of the vehicle's space. The shell 232 is located on the side of the upper box body 21 away from the lower box body 22, which can not only improve the energy density of the battery device 100, but also reduce the installation space occupied by the vehicle.

[0116] In the current battery device 100, the battery cell 10 and the electrical structure 40 are usually arranged in the same space and separated by a partition structure, which causes the electrical structure 40 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 232 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 40, thereby reducing the negative impact of the electrical structure 40 on the energy density of the battery device 100.

[0117] At the same time, the first accommodating cavity 201 and the second accommodating cavity 202 are separated by the upper box body 21, thereby reducing the negative impact of the heat generated by the operation or thermal runaway of the battery cell 10 on the electrical structure 40, and also reducing the negative impact of the heat generated by the thermal runaway of the electrical structure 40 on the battery cell 10.

[0118] 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 232 form a second accommodating cavity 202, so as to respectively accommodate the battery cell 10 and the electrical structure 40; the outer shell 232 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 40.

[0119] refer to Figure 4 In some embodiments, the upper box body 21 includes a staggered portion 211 formed by staggering the upper box body 21 with the lower box body 22 , and the one-way valve 30 is disposed in the staggered portion 211 .

[0120] The upper case 21 and the lower case 22 are offset, meaning that a portion of the upper case 21 can extend beyond the lower case 22, thereby forming an offset portion 211 outside the lower case 22 and the first accommodating cavity 201. The offset portion 211 is located on one side of the lower case 22. The upper case 21 can be offset from the lower case 22 in the longitudinal direction X of the battery device 100, in which case the offset portion 211 is located on one side of the lower case 22 along the longitudinal direction X of the battery device 100. The upper case 21 can also be offset from the lower case 22 in the width direction Y of the battery device 100, in which case the offset portion 211 is located on one side of the lower case 22 along the width direction Y of the battery device 100.

[0121] The offset portion 211 is located on one side of the lower case 22 . The offset portion 211 can be suspended relative to the lower case 22 . For example, in the height direction Z of the battery device 100 , the offset portion 211 is partially suspended relative to the lower case 22 .

[0122] The one-way valve 30 is arranged on the offset portion 211 so that the fluid in the second accommodating chamber 202 can be directly discharged to the outside of the box body 20 through the one-way valve 30, and the fluid is not easily accumulated on the upper box body 21, and the fluid adhering to the upper box body 21 or the lower box body 22 can be reduced.

[0123] In the case where the fluid is coolant leaked from the liquid cooling system, if the coolant discharged from the one-way valve 30 accumulates or adheres to the upper box body 21 or the lower box body 22 for a long time, it may cause damage such as rust to the upper box body 21 and the lower box body 22; setting the one-way valve 30 on the offset portion 211 can reduce the damage caused to the upper box body 21 and the lower box body 22 by the fluid discharged to the outside, and can also reduce the risk of the fluid entering the first accommodating chamber 201 from the gap between the upper box body 21 and the lower box body 22.

[0124] In addition to being used to better discharge the fluid in the second accommodating chamber 202, the offset portion 211 is also used to provide a fixed basis for the connection port 50, that is, the connection port 50 can be arranged on the part of the shell 232 extending outside the upper box body 21, so that the electrical structure 40 can be electrically connected to other structures outside the battery device 100 through the connection port 50, and it is also convenient for other electronic components to be electrically connected to the electrical structure 40 through the connection port 50.

[0125] In this embodiment, the upper box body 21 and the lower box body 22 are staggered to form a staggered portion 211, and the one-way valve 30 is set on the staggered portion 211, so that the fluid discharged to the outside of the box body 20 through the one-way valve 30 is not easily retained on the upper box body 21; when the fluid is liquid, this arrangement can make it difficult for the liquid discharged from the second accommodating chamber 202 to remain on the upper box body 21, thereby reducing the risk of failure of the battery device 100.

[0126] refer to Figure 4 In some embodiments, the offset portion 211 is closer to the bottom of the lower box body 22 than other positions of the upper box body 21 .

[0127] The offset portion 211 is closer to the bottom of the lower box body 22 than other positions of the upper box body 21, so that the fluid in the second accommodating chamber 202 can converge to the offset portion 211, so that the one-way valve 30 can better discharge the fluid in the second accommodating chamber 202 to the space outside the box body 20; for example, when the upper box body 21 and the lower box body 22 are arranged along the direction of gravity, the offset portion 211 can be the lowest point of the upper box body 21, so that the fluid can first converge at the offset portion 211.

[0128] When fluid appears in the second accommodating chamber 202 and needs to be discharged, the fluid in the second accommodating chamber 202 will first converge at the offset portion 211, so that the fluid generated in the second accommodating chamber 202 can be discharged to the outside of the box body 20 faster and in greater quantities, thereby reducing the fluid accumulated in the second accommodating chamber 202, thereby reducing the possible damage that the fluid may cause to the electrical structure 40.

[0129] In this embodiment, the one-way valve 30 is set at the offset portion 211, and the offset portion 211 is closer to the bottom of the lower box body 22, so that the fluid can better converge near the one-way valve 30 and be discharged, and the fluid accumulation in the second accommodating chamber 202 can be reduced, thereby better reducing the damage of the fluid to the electrical structure 40.

[0130] refer to Figure 5 、 Figure 6In some embodiments, the box body 20 includes an upper box body 21, a lower box body 22, an outer shell 232 and a bottom plate 231. A first accommodating chamber 201 is formed between the upper box body 21 and the lower box body 22. The bottom plate 231 is fixed to the upper box body 21. The outer shell 232 and the bottom plate 231 form a second accommodating chamber 202. At least a portion of the bottom plate 231 extends outside the upper box body 21. The one-way valve 30 is provided on the portion of the bottom plate 231 extending outside the upper box body 21.

[0131] 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 first accommodating cavity 201 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 snapping, screwing or other means.

[0132] The bottom plate 231 refers to the partial structure in the shell 232 connected to the upper box body 21. The bottom plate 231 is located on the side of the shell 232 facing the upper box body 21. The bottom plate 231 can completely cover the side of the shell 232 facing the upper box body 21, or the bottom plate 231 can only cover part of the side of the shell 232 facing the upper box body 21.

[0133] The shell 232 can form a second accommodating cavity 202 with the bottom plate 231. At this time, the shell 232 can be a structure with one end open, and the open end of the shell 232 is facing the bottom plate 231, so that the second accommodating cavity 202 is formed by the upper box body 21 and the shell 232; the bottom plate 231 can completely cover the open end of the shell 232. At this time, the bottom plate 231 and the shell 232 can form a closed second accommodating cavity 202. The bottom plate 231 can also completely cover only the part of the open end of the shell 232. At this time, the upper box body 21 can cooperate with the bottom plate 231 and the shell 232 to make the second accommodating cavity 202 a closed space.

[0134] At least part of the bottom plate 231 can extend outside the upper box body 21, that is, the part of the bottom plate 231 extending outside the upper box body 21 does not contact the upper box body 21 and is suspended in the air. The bottom plate 231 can only partially extend outside the upper box body 21, and at this time the other part of the bottom plate 231 is connected to the upper box body 21. The bottom plate 231 can also completely extend outside the upper box body 21, and at this time the bottom plate 231 can be indirectly connected to the upper box body 21 through structural parts.

[0135] The one-way valve 30 is arranged on the part of the bottom plate 231 extending outside the upper box body 21, so that the fluid in the second accommodating chamber 202 can be directly discharged to the outside of the box body 20 through the one-way valve 30, and the fluid is not easily accumulated on the upper box body 21. It can also reduce the fluid adhering to the upper box body 21 or the lower box body 22, thereby reducing the damage that the fluid may cause to the upper box body 21 and the lower box body 22.

[0136] This embodiment provides some specific structures of the shell 232, so that at least part of the bottom plate 231 of the shell 232 can extend outside the upper box body 21, and the one-way valve 30 is set on the part of the bottom plate 231 extending outside the upper box body 21, so that the fluid discharged to the outside of the box body 20 through the one-way valve 30 is not easily retained on the upper box body 21.

[0137] refer to Figure 5 、 Figure 6 In some embodiments, the bottom plate 231 includes a connecting portion 2311 and an extending portion 2312, the connecting portion 2311 is connected to the upper box body 21, one end of the extending portion 2312 is connected to the connecting portion 2311 or the upper box body 21, and the other end of the extending portion 2312 extends outside the upper box body 21; the one-way valve 30 is provided on the extending portion 2312.

[0138] The connecting portion 2311 refers to the structure in the bottom plate 231 that is connected to the upper box body 21. The shape of the connecting portion 2311 can be circular, square or other shapes; the connecting portion 2311 is connected to the upper box body 21. The connecting portion 2311 can be fixedly connected to the upper box body 21 by welding, bonding or other means, and can also be detachably connected to the upper box body 21 by screwing, clamping or other means.

[0139] The extension portion 2312 refers to a structure in the bottom plate 231 that extends outside the upper box body 21. The extension portion 2312 can be connected to the upper box body 21. In this case, the extension portion 2312 can be fixedly connected to the upper box body 21 by welding, bonding or other means, or it can be detachably connected to the upper box body 21 by screwing, snapping or other means; the extension portion 2312 can also be connected to the connecting portion 2311. In this case, the extension portion 2312 can be integrally formed with the connecting portion 2311, or it can be connected to the connecting portion 2311 by welding, bonding or other means.

[0140] Since the extension portion 2312 and the connection portion 2311 are both partial structures of the bottom plate 231, and the extension portion 2312 extends outside the upper box body 21, the connection portion 2311 is located at the edge of the upper box body 21 and close to the extension portion 2312. At this time, the connection portion 2311 can increase the connection strength of the outer shell 232 at the edge of the upper box body 21, and can also increase the strength at the corresponding edge of the upper box body 21, thereby increasing the connection strength and stability of the extension portion 2312.

[0141] The one-way valve 30 is arranged on the extension portion 2312 so that the fluid in the second accommodating chamber 202 can be directly discharged to the outside of the box body 20 through the one-way valve 30, and the fluid is not easily accumulated on the upper box body 21. It can also reduce the fluid adhering to the upper box body 21 or the lower box body 22, thereby reducing the damage that the fluid may cause to the upper box body 21 and the lower box body 22.

[0142] This embodiment provides some structures of the bottom plate 231, so that the bottom plate 231 includes a connecting portion 2311 connected to the upper box body 21, so that the outer shell 232 can be more stably connected to the upper box body 21; the bottom plate 231 also includes an extension portion 2312 extending outside the upper box body 21, and the one-way valve 30 is arranged on the extension portion 2312, so that the fluid discharged to the outside of the box body 20 through the one-way valve 30 is not easily retained on the upper box body 21.

[0143] refer to Figure 5 、 Figure 6 In some embodiments, the extension portion 2312 protrudes toward the bottom of the lower box body 22 to form a collection tank 24 connected to the second accommodating chamber 202, and the bottom of the collection tank 24 is closer to the bottom of the lower box body 22 than other positions of the outer shell 232 and the bottom plate 231; the one-way valve 30 is arranged at the bottom of the collection tank 24.

[0144] The extension portion 2312 protrudes toward the bottom of the lower box body 22 to form a collection groove 24, that is, the collection groove 24 is connected to the second accommodating chamber 202; because the extension portion 2312 is a partial structure of the bottom plate 231, and because the extension portion 2312 is located outside the upper box body 21, the extension portion 2312 protrudes toward the bottom of the lower box body 22, which can make the bottom of the collection groove 24 closer to the bottom of the lower box body 22 than other positions of the outer shell 232 and the bottom plate 231, so that the fluid in the second accommodating chamber 202 can converge to the collection groove 24.

[0145] For example, when the upper box body 21 and the lower box body 22 are arranged along the direction of gravity, the protruding direction of the extension part 2312 is downward protrusion along the direction of gravity. At this time, the collection tank 24 can be located at the lowest point in the second accommodating chamber 202, and the fluid in the second accommodating chamber 202 can converge to the collection tank 24 under the action of gravity.

[0146] The one-way valve 30 is provided at the bottom of the collecting tank 24 so that the one-way valve 30 can be located at the lowest point of the collecting tank 24 , thereby enabling the fluid in the collecting tank 24 to be better discharged to the outside of the box 20 and reducing the fluid accumulated in the collecting tank 24 .

[0147] In this embodiment, a collection tank 24 is provided and the bottom of the collection tank 24 is made closer to the bottom of the lower box body 22, and a one-way valve 30 is provided at the bottom of the collection tank 24 so that the liquid in the second accommodating chamber 202 can better flow into the collection tank 24, thereby facilitating the discharge of the fluid in the second accommodating chamber 202 through the one-way valve 30 and better reducing the fluid accumulated in the second accommodating chamber 202.

[0148] refer to Figure 5 In some embodiments, the box body 20 further includes a rib 25 provided on the upper box body 21, and the rib 25 is located in the second accommodating cavity 202; the electrical structure 40 is connected to the side of the rib 25 away from the upper box body 21, and the electrical structure 40 is spaced apart from the upper box body 21.

[0149] The rib 25 refers to a structure in the box body 20 that protrudes from the upper box body 21 into the second accommodating cavity 202, that is, the rib 25 protrudes upward from the upper box body 21 along the height direction Z of the battery device 100; the rib 25 can be a hollow structure formed by bending a plate, or a solid rib-like structure. The rib 25 can be a prismatic structure, a semi-cylindrical structure, or other structures; the length direction of the rib 25 can be parallel to the length direction X of the battery device 100, or parallel to the width direction Y of the battery device 100, and the length direction of the rib 25 can also intersect with both the length direction X and the width direction Y of the battery device 100; the rib 25 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 rib 25 can include metal, plastic, or other materials.

[0150] The electrical structure 40 is connected to the side of the rib 25 facing away from the upper box body 21, that is, the electrical structure 40 is connected to the upper side of the rib 25. This setting can create a gap between the electrical structure 40 and the bottom of the second accommodating cavity 202, so as to increase the height of the electrical structure 40 in the second accommodating cavity 202 and reduce the risk of the electrical structure 40 being immersed in the fluid in the second accommodating cavity 202, thereby reducing the damage to the electrical structure 40 caused by the fluid.

[0151] For example, in the case where the liquid cooling system in the second accommodating cavity 202 leaks coolant, part of the leaked coolant may temporarily accumulate at the bottom of the shell 232 and not be discharged in time. At this time, the part of the coolant is located below the electrical structure 40 and is not easy to contact or immerse the electrical structure 40, thereby reducing the damage to the electrical structure 40 caused by the leaked coolant.

[0152] Because the one-way valve 30 can discharge the fluid in the second accommodating chamber 202, the amount of fluid temporarily accumulated in the second accommodating chamber 202 is small. The rib 25 is used to form a gap between the electrical structure 40 and the bottom of the second accommodating chamber 202, which can effectively reduce the contact between the fluid and the electrical structure 40 and reduce the damage that the fluid may cause to the electrical structure 40.

[0153] In this embodiment, the electrical structure 40 is arranged on the rib 25 protruding from the upper box body 21, so that there is a gap between the electrical structure 40 and the upper box body 21. When fluid is generated in the second accommodating cavity 202, this arrangement can prevent the electrical structure 40 from easily contacting the fluid accumulated at the bottom of the second accommodating cavity 202, thereby reducing possible damage to the electrical structure 40.

[0154] refer to Figure 4 、 Figure 5 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 .

[0155] 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 40; because the battery cell 10 and the electrical structure 40 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 40 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.

[0156] 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 heat exchange medium leakage may have on the electrical structure 40.

[0157] 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 40; at the same time, the one-way valve 30 can reduce the damage that may be caused by leakage of the heat exchange medium.

[0158] refer to Figure 7 、 Figure 8In some embodiments, the one-way valve 30 includes a valve body 31 connected to the outer shell 232, and a flow cavity 311 and a first flow channel 312 and a second flow channel 313 connected to the flow cavity 311 are defined in the valve body 31. The first flow channel 312 is also connected to the space outside the box body 20, and the second flow channel 313 is also connected to the second accommodating chamber 202; the one-way valve 30 also includes a valve core 32 movably connected to the valve body 31, and the valve core 32 can open or close the first flow channel 312 and / or the second flow channel 313.

[0159] 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.

[0160] The valve body 31 is connected to the housing 232. The valve body 31 can be fixedly connected to the housing 232 by welding, bonding, or other means, or can be detachably connected to the housing 232 by screwing, clamping, or other means. The valve body 31 can be completely accommodated in the second accommodating chamber 202. In this case, a through hole should be opened at the position where the housing 232 and the valve body 31 are opposite to each other to facilitate fluid circulation. The valve body 31 can also be connected to the side of the housing 232 facing the outside world, that is, the valve body 31 can also be completely located outside the housing 232. In this case, a through hole should be opened at the position where the housing 232 and the valve body 31 are opposite to each other to facilitate fluid circulation. The valve body 31 can also be inserted into the housing 232, that is, part of the valve body 31 can extend into the second accommodating chamber 202, and the other part can extend to the outside world.

[0161] 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.

[0162] 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 space outside the box body 20. 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 be discharged to the outside of the box body 20 through the second flow channel 313, the circulation chamber 311 and the first flow channel 312 in sequence.

[0163] 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.

[0164] 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.

[0165] In addition to being used for fluid circulation, 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 40. At the same time, the fluid temporarily stored in the circulation chamber 311 can also increase the pressure of the fluid on the valve core 32.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] The valve core 32 can be driven to move by fluid, 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 be discharged from the second accommodating chamber 202 to the outside of the housing 20; for example, when the valve core 32 is controlled by the controller, the controller can include a sensor provided in the second accommodating chamber 202, which is used to detect the fluid condition in the second accommodating chamber 202. The controller can control the movement of the valve core 32 based on the detection information of the sensor to open or close the one-way valve 30.

[0170] 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.

[0171] refer to Figure 7 、 Figure 8 In some embodiments, the one-way valve 30 further includes an elastic member 33, one end of the elastic member 33 is connected to the valve core 32, and the other end is connected to the valve body 31, the deformation direction of the elastic member 33 is the same as the movement direction of the valve body 31, and the elastic member 33 is configured to apply a force to the valve core 32 to close the first flow channel 312.

[0172] The elastic member 33 refers to an elastic component in the valve body 31 . The elastic member 33 may be a spring, or an elastic rubber column or other elastic components.

[0173] One end of the elastic member 33 is connected to the valve core 32, and the other end is connected to the valve body 31; the end of the elastic member 33 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 33 is located outside the valve body 31, and the end of the elastic member 33 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 33 is located in the circulation cavity 311.

[0174] The deformation direction of the elastic member 33 is the same as the movement direction of the valve body 31, that is, the elastic member 33 is used to restore the valve body 31 to its original position after the valve body 31 moves; the elastic member 33 is configured to apply a force to the valve core 32 to close the first flow channel 312, that is, when the battery device 100 is in a non-working or normal working state, the one-way valve 30 is in a closed state, so that external debris is difficult to enter the second accommodating chamber 202, thereby reducing the interference of the external environment on the electrical structure 40.

[0175] 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 valve core 32 to move so that the first flow channel 312 is in an open state, and the elastic member 33 is deformed at this time; when the fluid in the second accommodating chamber 202 is discharged, the elastic member 33 restores its length and restores the valve core 32 to its original position 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 33.

[0176] In this embodiment, an elastic member 33 is provided so that the position of the valve body 31 in the natural state can be controlled by the elastic member 33; at the same time, the pressure conditions required for opening and closing the one-way valve 30 can be changed by adjusting the stiffness coefficient of the elastic member 33 to meet the needs of different working conditions.

[0177] refer to Figure 7 、 Figure 8 In some embodiments, the fluid entering the flow channel from the second accommodating chamber 202 is liquid; the one-way valve 30 also includes an expansion member 34 accommodated in the circulation chamber 311, and the expansion member 34 is configured to expand when soaked in liquid and abut against the inner wall of the circulation chamber 311 and the valve core 32 to push the valve core 32 to open the first flow channel 312; the force applied by the elastic member 33 to the valve core 32 is less than the force applied by the expansion member 34 to the valve core 32.

[0178] The expansion member 34 refers to a component in the one-way valve 30 that can expand when encountering liquid. The material of the expansion member 34 may include water-absorbing resin or other materials that can absorb liquid and expand.

[0179] The expansion member 34 is arranged in the circulation chamber 311. When liquid enters the circulation chamber 311, the expansion member 34 is soaked in the liquid and can expand, so that the expansion member 34 can be against the inner wall of the circulation chamber 311 and the valve core 32, and the expansion member 34 continues to expand to push the valve core 32 to move 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 34 can only be connected to the inner wall of the circulation chamber 311 or the valve core 32.

[0180] The force applied by the elastic member 33 to the valve core 32 is smaller than the force applied by the expansion member 34 to the valve core 32 , so that the expansion member 34 can push the valve core 32 to move after being soaked in liquid and expanded.

[0181] 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 valve core 32 closes the first flow channel 312, the liquid is difficult to be discharged directly and can accumulate in the circulation chamber 311 to infiltrate the expansion member 34; the expansion member 34 expands after being infiltrated by the liquid and pushes the valve core 32 to move, thereby opening the first flow channel 312. At this time, the fluid can be discharged through the first flow channel 312.

[0182] Depending on the material of the expansion member 34, the expansion member 34 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 34 or the entire one-way valve 30 can be replaced during the maintenance process, so the expansion member 34 may retract after drying or may not retract further.

[0183] In this embodiment, an expansion member 34 is provided. When liquid leakage occurs in the second accommodating chamber 202, the leaked liquid can cause the expansion member 34 to expand and cause the valve body 31 to open the first flow channel 312, so as to discharge 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 33 can cause the valve core 32 to close the first flow channel 312 to separate the second accommodating chamber 202 from the external environment, making it difficult for external impurities to enter the second accommodating chamber 202, thereby reducing the negative impact that external impurities may have on the electrical structure 40.

[0184] refer to Figure 7 、 Figure 8 In some embodiments, the valve body 31 also includes a sealing surface 314 facing the outside of the box body 20, and one end of the first flow channel 312 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.

[0185] The sealing surface 314 refers to the surface of the valve body 31 facing the outside world; 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.

[0186] 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.

[0187] 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 provided on the valve body 31 to guide 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.

[0188] One end of the first flow channel 312 connected to the space outside the box body 20 is located on the sealing surface 314. The sealing portion 321 moves relative to the valve body 31 and can abut against the sealing surface 314 to close the first flow channel 312. At this time, external impurities are blocked by the sealing portion 321 and are difficult to enter the first flow channel 312; the sealing portion 321 moves relative to the valve body 31 and can be spaced apart from the sealing surface 314, or staggered 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 be discharged to the outside of the box body 20 through the second flow channel 313, the circulation chamber 311 and the first flow channel 312.

[0189] Because the sealing surface 314 is located on the side of the valve body 31 facing the outside, and the sealing portion 321 is abutted 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 outside; at this time, after the fluid in the second accommodating chamber 202 enters the circulation chamber 311 through the second flow channel 313, the fluid in the circulation chamber 311 or the expansion member 34 can push the sealing portion 321 away from the sealing surface 314 to open the first flow channel 312, so that the liquid in the second accommodating chamber 202 can be discharged to the outside.

[0190] 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 situation where external impurities enter the first flow channel 312 from between the sealing portion 321 and the sealing surface 314 and then enter the second accommodating chamber 202.

[0191] For example, in order to improve the sealing performance between the sealing portion 321 and the sealing surface 314, a sealing ring can be provided on the sealing surface 314, or a sealing ring can be provided on the side of the sealing portion 321 facing the sealing surface 314; when the sealing portion 321 is abutted against the sealing surface 314, the sealing ring is deformed, and at this time, the two ends of the sealing ring are respectively abutted against the sealing surface 314 and the sealing portion 321, so as to improve the sealing performance between the sealing portion 321 and the sealing surface 314.

[0192] In this embodiment, the valve body 31 includes a sealing surface 314 facing the outside of the box body 20, and the valve core 32 includes a sealing portion 321 located outside the circulation chamber 311, so that the sealing portion 321 can be pressed against the sealing surface 314 to close the first flow channel 312, thereby achieving the effect of closing the one-way valve 30; 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 can be discharged to the space outside the box body 20.

[0193] refer to Figure 7 、 Figure 8 In some embodiments, a guide groove 35 is provided on the side of the valve body 31 facing outside the box body 20, and the sealing portion 321 is accommodated in the guide groove 35; at least one through hole 3211 is opened on the sealing portion 321, and in the moving direction of the valve core 32, the through hole 3211 is opposite to the sealing surface 314.

[0194] The guide groove 35 refers to a groove structure provided on the valve body 31, and the guide groove 35 is used to guide the moving direction of the sealing part 321; the guide groove 35 is provided on the side of the valve body 31 facing outside the box body 20, and the sealing surface 314 can be the bottom surface of the guide groove 35; the guide groove 35 can be a square groove, a circular groove or a groove structure of other shapes.

[0195] The axial direction of the guide groove 35 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 35 ; for example, the axial direction of the guide groove 35 can be parallel to the direction of gravity and perpendicular to the sealing surface 314 .

[0196] The through hole 3211 refers to a hole structure opened on the sealing part 321. The number of through holes 3211 can be one, two or more; the through hole 3211 can be a square hole, a circular hole or a hole structure of other shapes. The through hole 3211 can be a straight hole, a stepped hole, a conical hole or a hole structure of other shapes.

[0197] The 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 through hole 3211 is opposite to the sealing surface 314, and when the sealing portion 321 is against the sealing surface 314, the sealing surface 314 can close the through hole 3211. When there are multiple through holes 3211, the multiple through holes 3211 are all opposite to the sealing surface 314. This arrangement can close the through hole 3211 through the sealing surface 314, so that external impurities are difficult to flow into the first flow channel 312 through the through hole 3211, thereby enabling the sealing portion 321 to close the first flow channel 312.

[0198] Since the guide groove 35 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 35, or the gap between the side wall of the sealing portion 321 and the inner wall of the guide groove 35 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.

[0199] Accordingly, in this embodiment, a 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 chamber 311 through the through hole 3211, so that the fluid can be discharged from the second accommodating chamber 202 to the outside. At the same time, the through hole 3211 is opposite to the sealing surface 314. When the sealing portion 321 is against the sealing surface 314, the sealing surface 314 can close the through hole 3211 to prevent external impurities from entering the circulation chamber 311 through the through hole 3211, thereby improving the sealing performance of the one-way valve 30.

[0200] In some embodiments, reference Figure 7 、 Figure 8 , Figure 7 is a cross-sectional view of the one-way valve 30 in an open state, Figure 8 It is a cross-sectional schematic diagram of the one-way valve 30 in a closed state, and also a cross-sectional schematic diagram of the one-way valve 30 in a natural state.

[0201] The elastic member 33 and the expansion member 34 are both located in the circulation cavity 311. At this time, the valve core 32 includes not only the sealing portion 321, but also an intermediate portion 323 connected to the sealing portion 321. One end of the intermediate portion 323 is connected to the sealing portion 321, and the other end of the intermediate portion 323 extends into the circulation cavity 311.

[0202] One end of the elastic member 33 is connected to the inner wall of the circulation cavity 311, and the other end of the elastic member 33 is connected to the middle portion 323; the elastic member 33 can apply a force directed to the sealing surface 314 to the sealing portion 321 through the middle portion 323, so that the sealing portion 321 is pressed against the sealing surface 314, thereby closing the first flow channel 312.

[0203] The expansion member 34 is connected to the inner wall of the circulation cavity 311; after the liquid in the second accommodating cavity 202 enters the circulation cavity 311 from the second flow channel 313, the expansion member 34 is soaked in the liquid and expands, and one end of the expansion member 34 is pressed against the inner wall of the circulation cavity 311, and the other end of the expansion member 34 is pressed against the sealing portion 321 and pushes the sealing portion 321 to move, so that the sealing portion 321 is separated from the sealing surface 314 and the first flow channel 312 is opened; at the same time, the movement of the sealing portion 321 can also cause the elastic member 33 to be tensilely deformed through the middle portion 323.

[0204] In other embodiments, reference Figure 9 、 Figure 10 、 Figure 11, Figure 9 is a cross-sectional view of the one-way valve 30 in an open state, Figure 10 It is a cross-sectional schematic diagram of the one-way valve 30 in a closed state, and also a cross-sectional schematic diagram of the one-way valve 30 in a natural state.

[0205] In addition to the sealing portion 321 and the middle portion 323 , the valve core 32 further includes a limiting portion 322 . The limiting portion 322 is connected to an end of the middle portion 323 away from the sealing portion 321 , and the width of the limiting portion 322 is greater than that of the middle portion 323 .

[0206] A limiting hole 315 communicating with the circulation cavity 311 is also provided on the valve body 31. At this time, one end of the middle portion 323 passes through the limiting hole 315 so that the limiting portion 322 is located outside the circulation cavity 311; the maximum width of the limiting portion 322 is also greater than the inner diameter of the limiting hole 315, so that the limiting portion 322 is difficult to enter the limiting hole 315.

[0207] The elastic member 33 is located outside the flow cavity 311 and between the limiting portion 322 and the valve body 31 . The elastic member 33 can apply an upward force to the limiting portion 322 to hold the sealing portion 321 against the sealing surface 314 through the middle portion 323 .

[0208] The expansion member 34 is located in the circulation cavity 311, and the expansion member 34 is connected to the inner wall of the circulation cavity 311; after the liquid in the second accommodating cavity 202 enters the circulation cavity 311 from the second flow channel 313, the expansion member 34 is soaked in the liquid and expands, and one section of the expansion member 34 is pressed against the inner wall of the circulation cavity 311, and the other end of the expansion member 34 is pressed against the sealing portion 321 and pushes the sealing portion 321 to move, so that the sealing portion 321 is separated from the sealing surface 314 and the first flow channel 312 is opened; at the same time, the movement of the sealing portion 321 can also drive the limiting portion 322 to compress the elastic member 33 through the middle portion 323, so that the elastic member 33 is compressed and deformed.

[0209] refer to Figures 7 to 11 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 outside the box body 20, and the fixing portion 3162 passes through the box body 20 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 box body 20 is clamped between the fixing member 317 and the base 3161.

[0210] The valve body main body 316 refers to the structure in the valve body 31 that is mainly used to provide a carrier for other structures of the one-way valve 30. The flow cavity 311, the first flow channel 312, and the second flow channel 313 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.

[0211] The fixing member 317 refers to a structure for fixing the valve body 316 on the box body 20; the material of the fixing member 317 may include metal, plastic or other materials.

[0212] The base 3161 refers to the structure of the valve body 316 that is mainly used to connect with the box body 20; the material of the base 3161 can include metal, plastic or other materials.

[0213] 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.

[0214] The base 3161 is located outside the box body 20, and the fixing portion 3162 passes through the box body 20 from the base 3161, so that at least part of the fixing portion 3162 is located in the second accommodating chamber 202; the fixing member 317 is connected to the fixing portion 3162, and part of the box body 20 is clamped between the fixing member 317 and the base 3161 to fix the one-way valve 30 on the box body 20. The fixing member 317 can be fixedly connected to the fixing portion 3162 by welding, bonding or other means, or can be detachably connected to the fixing portion 3162 by screwing, clamping or other means.

[0215] When the housing 20 includes a shell 232, the one-way valve 30 is disposed on the shell 232. For example, a through hole is formed in the shell 232, and the fixing portion 3162 can pass through the through hole from the outside of the shell 232. In this case, the base 3161 is located outside the shell 232 and abuts against the side of the shell 232 facing the outside. The fixing member 317 is connected to the portion of the fixing portion 3162 located within the second accommodating chamber 202, and the fixing member 317 is located within the second accommodating chamber 202. The fixing member 317 abuts against the side of the shell 232 facing the inside of the second accommodating chamber 202. The portion of the shell 232 surrounding the through hole is clamped between the fixing member 317 and the base 3161. The fixing member 317 and the base 3161 thereby fix the one-way valve 30 to the shell 232.

[0216] It can be understood that, depending on the position of the fixing member 317, a through hole 3211 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 3211 can also be opened on the fixing member 317 to be opposite to the limiting hole 315 and the first flow channel 312.

[0217] In this embodiment, the valve body 31 includes a valve body main body 316 and a fixing member 317 , so that part of the box body 20 is clamped between the valve body main body 316 and the fixing member 317 , thereby fixing the one-way valve 30 on the box body 20 .

[0218] refer to Figures 7 to 11 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.

[0219] 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 against the outer shell 232, and can clamp the outer shell 232 between the base 3161 and the fixing member 317.

[0220] 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 .

[0221] refer to Figures 7 to 12 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] 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 outer shell 232, and between the base 3161 and the outer shell 232 can be improved, so that external impurities are not easily introduced into the second accommodating cavity 202 through the gap between the base 3161 and the outer shell 232.

[0226] 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.

[0227] In some embodiments, the battery device 100 includes a battery cell 10 , an electrical structure 40 , a housing 20 , and a one-way valve 30 .

[0228] The box body 20 includes a lower box body 22, an upper box body 21, a bottom plate 231 and an outer shell 232. A first accommodating cavity 201 with an open end is provided in the lower box body 22. The upper box body 21 is connected to the top of the lower box body 22 and covers the open side of the first accommodating cavity 201. The outer shell 232 is provided above the upper box body 21, and a second accommodating cavity 202 is provided in the outer shell 232.

[0229] The battery cell 10 is accommodated in the first accommodation cavity 201 , and the electrical structure 40 is accommodated in the second accommodation cavity 202 .

[0230] Portions of the bottom plate 231 and the outer shell 232 extend beyond the upper case 21 along the length direction X of the battery device 100; the bottom plate 231 and the outer shell 232 enclose a second accommodating chamber 202; the bottom plate 231 includes a connecting portion 2311 and an extending portion 2312, the connecting portion 2311 is connected to the upper case 21, the extending portion 2312 is connected to the upper case 21 and extends beyond the upper case 21 along the length direction X of the battery device 100, and the extending portion 2312 protrudes downward along the height direction Z of the battery device 100 to form a collection groove 24, which is connected to the second accommodating chamber 202.

[0231] A rib 25 is provided on one side of the upper box body 21 facing the second accommodating cavity 202 , and the electrical structure 40 is disposed on the rib 25 so that a gap exists between the electrical structure 40 and the bottom wall of the second accommodating cavity 202 .

[0232] The one-way valve 30 is provided at the bottom of the collecting tank 24 . The fluid in the second accommodating chamber 202 can be discharged to the outside through the one-way valve 30 , and external impurities are difficult to enter the second accommodating chamber 202 through the one-way valve 30 .

[0233] The one-way valve 30 includes a valve body 31 including 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 on the side of the shell 232 facing the outside world. The fixing portion 3162 passes through the shell 232 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 shell 232 between the fixing member 317 and the base 3161.

[0234] 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 outside; 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 315, the limiting hole 315 is defined in the fixed portion 3162 and is located above the circulation chamber 311, one end of the limiting hole 315 is connected to the circulation chamber 311, and the other end of the limiting hole 315 is connected to the second accommodating chamber 202.

[0235] The one-way valve 30 also includes a valve core 32, which includes a sealing portion 321, an intermediate portion 323 and a limiting portion 322; the sealing portion 321 is located below the valve body 316, 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 intermediate portion 323 is connected to the upper side of the sealing portion 321, and the other end of the intermediate portion 323 extends through the circulation cavity 311 and the limiting hole 315 to the second accommodating cavity 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 315, that is, the limiting portion 322 is difficult to enter the limiting hole 315.

[0236] An elastic member 33 is provided between the limiting portion 322 and the valve body 316 . The elastic member 33 is used to apply an upward force to the limiting portion 322 to drive the sealing portion 321 to abut against the sealing surface 314 through the limiting portion 322 and the middle portion 323 .

[0237] An expansion member 34 is provided in the circulation cavity 311 . The expansion member 34 can expand when soaked in liquid, so as to push the sealing portion 321 to move away from the sealing surface 314 .

[0238] In a second aspect, embodiments of the present application further provide an electrical device 1000 , which includes the battery device 100 provided in some embodiments of the first aspect.

[0239] In the electrical device 1000, liquid leaked from the liquid cooling system into the second accommodating chamber 202 can be discharged to the outside through the one-way valve 30, thereby reducing damage to the electrical structure 40 of the battery device 100 caused by damage to the liquid cooling system, thereby improving the stability of the battery device 100; external impurities are difficult to enter the second accommodating chamber 202, thereby reducing damage to the electrical structure 40 caused by external impurities, thereby further improving the stability of the battery device 100.

[0240] In a third aspect, embodiments of the present application further provide a vehicle, 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.

[0241] The top of the box 20 can serve as the entire floor of the vehicle or only as a part of the vehicle floor; 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, thereby reducing the overall weight of the vehicle and saving the space of the original floor structure to increase the space in the passenger compartment.

[0242] 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, and the second accommodating cavity is used to accommodate the electrical structure; a one-way valve connected to the casing, with one end of the one-way valve facing the second accommodating chamber and the other end of the one-way valve facing the space outside the casing. The one-way valve is configured to allow the fluid in the second accommodating chamber to be discharged to the space outside the casing, and the one-way valve is also used to prevent substances in the space outside the casing 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 a shell, which is arranged on a side of the upper box body away from the lower box body, and the shell and the upper box body form the second accommodating cavity.

3. The battery device according to claim 2, characterized in that The upper box body includes a dislocation portion formed by being displaced with the lower box body, and the one-way valve is arranged in the dislocation portion.

4. The battery device according to claim 3, characterized in that The offset portion is closer to the bottom of the lower box body than other positions of the upper box body.

5. The battery device according to claim 1, wherein: The box body includes an upper box body, a lower box body, an outer shell and a bottom plate. The first accommodating chamber is formed between the upper box body and the lower box body. The bottom plate is fixed to the upper box body. The outer shell and the bottom plate form the second accommodating chamber. At least part of the bottom plate extends outside the upper box body. The one-way valve is provided on the part of the bottom plate extending outside the upper box body.

6. The battery device according to claim 5, characterized in that The bottom plate includes a connecting portion and an extending portion, wherein the connecting portion is connected to the upper box body, one end of the extending portion is connected to the connecting portion or the upper box body, and the other end of the extending portion extends outside the upper box body; The one-way valve is arranged on the extending portion.

7. The battery device according to claim 6, characterized in that The extension portion protrudes toward the bottom of the lower box body to form a collecting trough communicated with the second accommodating cavity, and the bottom of the collecting trough is closer to the bottom of the lower box body than other positions of the outer shell and the bottom plate; The one-way valve is arranged at the bottom of the collecting tank.

8. The battery device according to any one of claims 2 to 7, characterized in that: The box body further comprises a convex rib provided on the upper box body, wherein the convex rib is located in the second accommodating cavity; The electrical structure is connected to a side of the rib facing away from the upper box body, and the electrical structure is spaced apart from the upper box body.

9. The battery device according to any one of claims 1 to 8, 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.

10. The battery device according to any one of claims 1 to 9, characterized in that: The one-way valve includes a valve body connected to the housing, the valve body is provided with a flow cavity and a first flow channel and a second flow channel communicating with the flow cavity, the first flow channel is also connected to the space outside the housing, and the second flow channel is also 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.

11. The battery device according to claim 10, characterized in that The one-way valve also includes an elastic member, one end of which is connected to the valve core and the other end is connected to the valve body. The deformation direction of the elastic member is the same as the movement direction of the valve body. The elastic member is configured to apply a force to the valve core to close the first flow channel.

12. The battery device according to claim 11, wherein: The fluid entering the flow channel from the second accommodating chamber 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 and abut against the inner wall of the circulation cavity and the valve core, so as to push the valve core to open the first flow channel; The force applied by the elastic member to the valve core is smaller than the force applied by the expansion member to the valve core.

13. The battery device according to claim 11 or 12, characterized in that: The valve body further includes a sealing surface facing outside the box body, and one end of the first flow channel 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.

14. The battery device according to claim 13, wherein: A guide groove is provided on a side of the valve body facing outside the box body, and the sealing portion is accommodated in the guide groove; At least one through hole is formed on the sealing portion, and in the movable direction of the valve core, the through hole is opposite to the sealing surface.

15. The battery device according to any one of claims 10 to 14, 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 outside the box body, and the fixing portion passes through the box body and is located in the second accommodating cavity; The fixing member is connected to the fixing portion, and a portion of the box body is clamped between the fixing member and the base.

16. The battery device according to claim 15, characterized in that 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.

17. The battery device according to claim 15 or 16, 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.

18. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-17.

19. A vehicle, characterized in that: The battery device according to any one of claims 1 to 17 is comprised, wherein the top of the box forms at least a part of the floor of the vehicle.

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