Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and belongs to the technical field of batteries. The battery device comprises a battery monomer assembly, a box body, a limiting piece and a discharge function part, the box body comprises a first wall for accommodating an accommodating cavity of the battery monomer assembly and a box main body, the first wall is positioned on the lower side of the battery monomer assembly along a first direction, and the first direction is parallel to the gravity direction of the battery device; the limiting piece is arranged in the accommodating cavity and is fixedly connected with the box main body; one end, in the first direction, of the discharge function component is fixedly connected with the first wall, the other end of the discharge function component abuts against the limiting piece, and the limiting piece can limit the discharge function component to move in the direction opposite to the first direction so as to reliably restrain the deformation of the portion, corresponding to the discharge function component, of the first wall protruding towards the interior of the containing cavity. According to the scheme, the risk of deformation and cracking of the first wall is reduced, so that the discharge functional part can be stably mounted, and the problem that the performance of the battery device is easy to lose efficacy due to impact on the bottom of the battery device is relieved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

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

[0003] In some related technologies, the bottom of the battery compartment is equipped with a venting function, and the compartment and the battery compartment for holding the battery are arranged adjacent to each other. In practical applications, the battery device is prone to failure when its bottom is subjected to high-intensity impact. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one objective of this application is to provide a battery device and electrical equipment to alleviate the problem that battery device performance is easily affected by impacts to the bottom of the battery device.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a battery cell assembly, a housing, a limiting member, and a discharge function component. The housing includes a first wall and a housing body, which together enclose a receiving cavity for accommodating the battery cell assembly. The first wall is located below the battery cell assembly along a first direction, wherein the first direction is parallel to the direction of gravity of the battery device. The limiting member is disposed in the receiving cavity and fixedly connected to the housing body. One end of the discharge function component along the first direction is fixedly connected to the first wall, and the other end abuts against the limiting member. The limiting member can restrict the movement of the discharge function component in the opposite direction of the first direction.

[0006] In the technical solution of this application embodiment, a limiting member is provided that abuts against the other end of the discharge functional component along the first direction, and the limiting member is fixedly connected to the main body of the casing to form a stable fulcrum. When the battery device is subjected to a bottom impact force, the limiting member generates a reaction force under the constraint of the stable fulcrum, thereby forming a stable displacement restriction on the discharge functional component and suppressing the deformation of the portion of the first wall where the discharge functional component is located protruding into the receiving cavity. At the same time, the limiting member can guide the impact load originally concentrated on the first wall to the main body of the casing, extending the transmission path of the impact load and dispersing the impact energy in a direction opposite to the first direction. In this way, the risk of deformation and cracking of the first wall is reduced, allowing the discharge functional component to maintain stable installation and mitigating the risk of performance failure of the battery device.

[0007] In some embodiments, the main body of the box includes a second wall, and the first wall and the second wall are disposed opposite to each other along a first direction; the battery device further includes a fixing beam, which is fixedly connected to the second wall, and a limiting member is fixedly connected to the fixing beam.

[0008] In this embodiment, the limiting component is indirectly fixedly connected to the box body through its connection with the fixed beam, and the fixed beam provides the installation foundation for the limiting component.

[0009] In some embodiments, at least one end of the battery cell assembly along the second direction abuts against the fixed beam, which is used to resist the expansion force generated by the battery cell assembly; the receiving cavity is divided into a battery compartment and a receiving compartment by the fixed beam, the battery cell assembly is housed in the battery compartment, and the limiting member and the venting function component are disposed in the receiving compartment; wherein, the second direction is perpendicular to the first direction.

[0010] In this embodiment, the fixed beam can resist the expansion force generated by the battery cell assembly and provide a stable installation base for the limiting component, thus enabling the fixed beam to serve multiple purposes.

[0011] In some embodiments, a gap exists between the end of the fixed beam facing away from the second wall along a first direction and the first wall, and the battery compartment and the receiving compartment are connected through the gap. By creating a gap between the fixed beam and the first wall, the fixed beam does not abut against the first wall, thus cutting off the transmission path of impact force directly transmitted from the first wall to the fixed beam, ensuring that the fixed beam can act as a stable fulcrum.

[0012] In some embodiments, the battery device further includes: a heat exchange assembly and two pipes, the heat exchange assembly being at least partially located in the battery compartment and exchanging heat with the battery cell assembly, the two pipes being housed in a receiving compartment, one pipe communicating with the inlet of the heat exchange assembly and for supplying heat exchange fluid to the heat exchange assembly, and the other pipe communicating with the outlet of the heat exchange assembly and for discharging heat exchange fluid; a portion of a limiting member is located below the pipes along a first direction, and the limiting member is configured to cover at least a portion of the outer periphery of at least one pipe.

[0013] This technical solution benefits from the fact that the limiting member is constructed to cover at least part of the outer periphery of at least one pipe, which allows the limiting member to occupy less space, improves the utilization rate of the internal space of the housing, and makes the structure of the battery device more compact.

[0014] In some embodiments, the limiting member includes: a stop plate and a connecting structure. The stop plate is located on the lower side of the pipe along the first direction. The stop plate and the first wall are disposed opposite each other along the first direction. The connecting structure is connected to the stop plate and is disposed on the side of the stop plate away from the first wall. The connecting structure is fixedly connected to the fixed beam.

[0015] In this embodiment, the contact between the stop plate and the other end of the venting functional component is a surface contact, which helps to reduce the contact stress between the stop plate and the venting functional component.

[0016] In some embodiments, the fixed beam has a first beam main body and a second beam main body, the second beam main body being located below the first beam main body along a first direction; the connecting structure includes a first plate and a second plate, the second plate being located below the first plate along the first direction, the first plate being opposite to and connected to the first beam main body, and the second plate being opposite to and connected to the second beam main body.

[0017] By adopting this technical solution, based on the original fixed beam structure (that is, the fixed beam still has a first beam main board and a second beam main board, with the second beam main board located on the lower side of the first beam main board along the first direction), the connection structure is designed to include a first plate and a second plate, with the second plate located on the lower side of the first plate along the first direction, so that the limiting member can be adapted to the structure of the fixed beam. In this way, the limiting member can be reliably connected to the fixed beam without changing the structure of the fixed beam.

[0018] In some embodiments, at least two limiting members are provided, and two pipes are arranged sequentially along a third direction. At least a portion of the outer periphery of each pipe is covered by a limiting member, and the third direction is parallel to the extension direction of the fixed beam.

[0019] In some embodiments, the battery device further includes a buffer pad disposed between the other end of the discharge functional component and the limiting member. By providing the buffer pad, when the bottom of the battery device is impacted, the buffer pad can absorb and dissipate part of the impact energy by utilizing its own compressive deformation capability.

[0020] In some embodiments, the venting component is a drain valve, which is configured to drain liquid from the containment chamber. In scenarios involving thermal runaway of individual battery cells or leakage of the liquid heat exchange medium, the drain valve allows liquid to be drained from the casing, improving the reliability of the battery device during use.

[0021] In some embodiments, the battery cell assembly includes a plurality of battery cells, each battery cell including a housing and a pressure relief mechanism, the pressure relief mechanism being disposed at one end of the housing facing the first wall, the pressure relief mechanism being used to release the internal pressure of the battery cell when the internal pressure or temperature of the battery cell reaches a threshold.

[0022] In some embodiments, the battery device further includes an integrated busbar, which includes a busbar component. Multiple battery cells of the battery cell assembly are connected through the busbar component. The integrated busbar is disposed on the side of the battery cell assembly facing the first wall, and a drain valve is located on the lower side of the integrated busbar along a first direction.

[0023] With this technical solution, when water enters the tank and the liquid level inside the tank gradually rises, the drain valve is located on the lower side of the integrated busbar, which delays the time for the liquid to contact the manifold components, thus improving the reliability of the battery device during use.

[0024] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0025] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0026] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0027] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0028] Figure 2 This is an exploded structural diagram of a battery according to some embodiments of this application;

[0029] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0030] Figure 4 This is a cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0031] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0032] Figure 6 A partial structural diagram of the battery device in some embodiments of this application, omitting the first wall, is shown from a bottom-view perspective.

[0033] Figure 7 This is a three-dimensional structural diagram of the limiting member in some embodiments of this application;

[0034] Figure 8 for Figure 7 A top view of the limiting component shown;

[0035] Figure 9 for Figure 7 The diagram shown is a first-person view of the limiting component.

[0036] Figure 10 for Figure 7 The diagram shown is a schematic representation of the limiting component from a second-person perspective.

[0037] Figure 11 This is a front view schematic diagram of the drain valve of some embodiments of this application;

[0038] Figure 12 for Figure 11 The diagram shown is an exploded view of the drain valve.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1000 vehicles;

[0041] Battery unit 100, controller 200, motor 300;

[0042] Battery cell assembly 10, battery cell 11, housing 110, casing 111, end cap 112, electrode assembly 120, pressure relief mechanism 130, electrode terminal 140;

[0043] Box 20, second box 21, first box 22, first wall 23, second wall 24, frame 25, battery compartment 26, storage compartment 27, gap 28;

[0044] Fixed beam 30, first beam body 31, mounting part 32, first beam main board 321, second beam main board 322, second beam body 33;

[0045] Limiting component 40, stop plate 41, connecting structure 42, first plate 421, second plate 422, connecting hole 423, connecting component 43, first connecting post 431, second connecting post 432;

[0046] Pipeline 50;

[0047] The venting function component 60 includes a drain valve 61, a valve body 611, a valve main body 6111, a protrusion 6112, an inlet 612, and a nut 613.

[0048] 70mm cushioning pad;

[0049] Screw 80. Detailed Implementation

[0050] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0055] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0056] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components.

[0058] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0059] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0060] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0061] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0062] During electric vehicle operation, the bottom of the power battery is susceptible to high-intensity mechanical impacts from objects such as flying stones, road bumps, and obstacles. To ensure reliable operation after such impacts, power batteries typically undergo bottom ball impact testing before leaving the factory. This means that the bottom of the power battery is subjected to high-intensity impacts in both bottom ball impact testing and real-world application scenarios. Furthermore, with advancements in battery technology, the requirements for the impact resistance of the power battery's bottom are becoming increasingly stringent, and the impact energy that the bottom of the power battery must withstand is constantly increasing.

[0063] Traditional battery packs lack a bottom-mounted venting mechanism. To improve reliability, some technologies incorporate this mechanism. Specifically, the internal space of the battery pack is divided into a battery compartment and a receiving compartment. Individual battery cells are housed in the battery compartment, supported by the bottom wall of the pack. The venting mechanism is located on the bottom wall corresponding to the receiving compartment. In these battery packs with a bottom-mounted venting mechanism, a strong impact force is applied to the bottom wall corresponding to the receiving compartment. Because the portion of the bottom wall corresponding to the battery compartment is pushed against by the battery cells, its upward deformation is less than that of the portion corresponding to the receiving compartment. This causes significant localized deflection in the receiving compartment portion, leading to upward displacement of the venting mechanism. Increased local stress in the bottom wall can cause cracks at the boundary between the receiving and battery compartment portions, resulting in an unstable mounting base for the venting mechanism and potential failure of the battery pack's performance (sealing, impact resistance, etc.). Therefore, battery devices with venting components at the bottom are difficult to meet higher bottom impact requirements.

[0064] To address this technical problem, some related technologies consider increasing the thickness of the bottom wall of the container or increasing the thickness of the bottom wall of the container corresponding to a local location of the containment chamber to improve the impact resistance of the bottom wall. However, this would increase the weight of the container and the material cost.

[0065] Based on the above considerations, a battery device is designed. A limiting member is set inside the receiving chamber, and the limiting member abuts against the upper end of the discharge function component. The limiting member is also fixedly connected to the main body of the box, so that the fixed connection between the limiting member and the main body of the box forms a stable fulcrum. The limiting member is configured to restrict the upward movement of the discharge function component.

[0066] In this battery device, because the limiting member is not fixedly connected to the first wall of the housing used to house the discharge function component, when the battery device is subjected to a bottom impact, the limiting member can reliably suppress the upward deformation of the portion of the first wall corresponding to the discharge function component, reducing the risk of deformation and cracking of the first wall. This allows the discharge function component to maintain stable installation and alleviates the problem of battery device performance failure caused by bottom impacts. Furthermore, this battery device can meet higher bottom impact requirements.

[0067] The battery devices described in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using battery cells and battery devices as described in this application.

[0068] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0069] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0070] Please refer to Figure 1 , Figure 1 The diagram illustrates the structure of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0071] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0072] Figure 2 An exploded structural diagram of a battery device 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0073] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0074] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0075] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 20 and one or more individual battery cells 10. The housing 20 has an internal cavity in which the individual battery cells 10 are housed. The housing 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the housing 20 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0076] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0077] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0078] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0079] The battery cell 11 provided in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0080] The battery cell 11 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc., and this application has no particular limitation.

[0081] Figure 3An exploded view of the battery cell 11 according to an embodiment of this application is shown. Please refer to [link / reference]. Figure 3 The battery cell 11 provided in the embodiments of this application includes a casing 110, an electrode assembly 120, and an electrolyte. The electrode assembly 120 is a component in the battery cell 11 in which an electrochemical reaction occurs. The electrode assembly 120 and the electrolyte are housed within the casing 110. As an example, the electrolyte may be liquid, gel-like, or solid.

[0082] As an example, the outer casing 110 can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the outer casing 110 can be a sealed structure or a non-sealed structure. As an example, when the outer casing 110 is a non-sealed structure, the outer casing 110 serves to protect the electrode assembly 120, and a sealing bag is also included between the outer casing 110 and the electrode assembly 120. The sealing bag is used to encapsulate the electrode assembly 120 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 110 is a sealed structure, it is used to encapsulate the electrode assembly 120 and the electrolyte, etc.

[0083] As an example, the housing 110 includes a housing 111 and an end cap 112. The housing 111 has an opening, and the end cap 112 closes onto the opening of the housing 111. The housing 111 and the end cap 112 together enclose a mounting cavity, which provides mounting space for components such as electrode assemblies.

[0084] End cap 112 refers to a component that covers the opening of housing 111 to isolate the internal environment of battery cell 11 from the external environment. The shape of end cap 112 can be adapted to the shape of housing 111 to fit it. Optionally, end cap 112 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 112 is not easily deformed under pressure or impact, giving battery cell 11 higher structural strength and improved safety performance. Functional structures such as electrode terminals 140 can be provided on end cap 112. Electrode terminals 140 can be used for electrical connection with electrode assemblies to output or input electrical energy to battery cell 11.

[0085] As an example, the end cap 112 may also be provided with a pressure relief mechanism 130 for releasing internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold. The end cap 112 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0086] The housing 111 is a component used to cooperate with the end cap 112 to form the internal environment of the battery cell 11. This internal environment can accommodate electrode components, electrolyte, and other components. The housing 111 and the end cap 112 can be independent components. The housing 111 has an opening, and the end cap 112 closes the opening to form the internal environment of the battery cell 11. Alternatively, the end cap 112 and the housing 111 can be integrated. Specifically, the end cap 112 and the housing 111 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 111, the end cap 112 closes the housing 111. The housing 111 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 111 can be determined according to the specific shape and size of the electrode components. The housing 111 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic. This application embodiment does not impose any special limitations on these materials.

[0087] Figure 4 A cross-sectional schematic diagram of a battery device according to some embodiments of this application is shown. Figure 5 for Figure 4 A magnified view of a portion at point A. Please refer to [link / reference]. Figure 4 and Figure 5 The battery device provided in this application embodiment also includes a limiting member 40 and a discharge function component 60. The housing 20 includes a first wall 23 and a housing body. The first wall 23 and the housing body together enclose a receiving cavity for accommodating the battery cell assembly 10. The first wall 23 is located on the lower side of the battery cell assembly 10 along a first direction. The first direction is parallel to the direction of gravity of the battery device. The limiting member 40 is disposed in the receiving cavity and fixedly connected to the housing body. One end of the discharge function component 60 along the first direction is fixedly connected to the first wall 23, and the other end abuts against the limiting member 40. The limiting member 40 is configured to restrict the movement of the discharge function component 60 in the opposite direction of the first direction.

[0088] The direction of gravity refers to the direction in which gravity acts when the battery device is used in an electrical appliance. Figure 4 and Figure 5 In this context, the direction of gravity can be referenced to the Z-direction, and the first direction can also be referenced to the vertically downward direction. The opposite direction to the first direction refers to a direction parallel to and opposite to the first direction, which can be referenced to the vertically upward direction. The first wall 23 can also be called the bottom wall. The battery cell assembly 10 is placed on the first wall 23. During the bottom ball impact test, an impact force is applied to the first wall 23. The direction of the impact force is parallel to and opposite to the first direction. Figure 5 See F for details. In other words, the bottom wall of the box 20 is subjected to a vertically upward impact force.

[0089] In some embodiments, the housing 20 includes a first housing 22 and a second housing 21. The second housing 21 covers the top of the first housing 22, forming a receiving cavity inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or shutting off; it can be either non-sealed or sealed to prevent liquids or other foreign matter from affecting the charging or discharging of the battery cell 11. As an example, the second housing 21 has a hollow structure with an open bottom. The first housing 22 has a plate-like structure and closes the open bottom of the second housing 21. In this embodiment, the first housing 22 forms the first wall 23, and the second housing 21 forms the housing body. As an example, the first box 22 is a hollow structure with an open top. The second box 21 is a top cover structure that closes the open top of the first box 22. In this example, the first box 22 includes a first wall 23 and a frame 25 integrally connected to the periphery of the first wall 23. The frame 25 and the second box 21 (top cover, also referred to as the second wall 24) form the main body of the box. In some embodiments, both the first box 22 and the second box 21 are hollow structures with one side open. The first box 22 includes a first wall 23 and a first frame 25 integrally connected to the periphery of the first wall 23. The second box 21 includes a second wall 24 and a second frame 25 integrally connected to the periphery of the second wall 24. The first wall 23 and the second wall 24 are disposed opposite to each other. In this example, the first frame 25 and the second box 21 form the main body of the box.

[0090] The venting component 60 refers to a device that can be installed at the bottom of the battery device and enables the receiving cavity to communicate with the outside of the casing to achieve venting when the battery device meets the venting conditions. The venting component 60 can be, but is not limited to, a drain valve 61, an explosion-proof valve, etc. The setting of the venting component 60 can benefit the improvement of the operational reliability of the battery device. Taking the drain valve as an example, the corresponding venting condition can be that the liquid volume in the receiving cavity reaches a preset value, so that the liquid in the receiving cavity is discharged to the outside of the casing. Taking the explosion-proof valve as an example, the corresponding venting condition can be that the pressure or temperature in the receiving cavity reaches a certain value. It is possible to design the venting component 60 so that part of it is located inside the receiving cavity and part of it is located outside the receiving cavity, or the entire venting component 60 can be designed to be located inside the receiving cavity. One end of the venting component 60 along the first direction ( Figure 5 The middle (lower end) is fixedly connected to the first wall 23, and the other end ( Figure 5 The upper part (of the middle part) abuts against the limiting member 40. Here, the discharge function component 60 and the limiting member 40 can be understood as directly abutting or indirectly abutting. In this article, the fixed connection can be achieved by welding, interference fit, bonding, screwing, riveting, etc.

[0091] The limiting member 40 is a component that abuts against the upper end of the venting functional component 60 to restrict its movement in a direction opposite to the first direction. Since the limiting member 40 is fixedly connected to the main body of the enclosure, it is not connected to the first wall 23; that is, the limiting member 40 is not fixedly connected to the first wall 23. Exemplarily, the limiting member 40 may be fixedly connected to the second wall 24 or the frame 25 of the main body of the enclosure. The limiting member 40 may be made of metal to give it high strength, ensuring reliable abutment against the venting functional component 60.

[0092] In the scenario of bottom ball impact test and in the scenario of electric vehicle driving with power system composed of battery device of this embodiment, the battery device of this embodiment has an impact force acting on the first wall 23 in the opposite direction to the first direction. The impact force is transmitted to the limiting member 40. The limiting member 40 applies a reaction force to the discharge function component 60 in the opposite direction to the impact force to restrict the movement of the discharge function component 60 in the opposite direction to the first direction. Therefore, it can suppress the deformation of the part of the first wall 23 where the discharge function component 60 is located from protruding into the receiving cavity.

[0093] It is understandable that in the technical solution where the limiting member 40 is connected to the first wall 23, when the first wall 23 is impacted, the limiting member 40 connected to the first wall 23 may be displaced synchronously with the first wall 23, which will weaken the supporting effect of the limiting member 40 on the venting function component 60.

[0094] In this embodiment, the battery device is equipped with a limiting member 40 that abuts against the other end of the discharge functional component 60 along the first direction. The limiting member 40 is also fixedly connected to the main body of the casing to form a stable fulcrum. When the battery device is subjected to a bottom impact force, the limiting member 40 generates a reaction force under the constraint of the stable fulcrum, thus providing stable displacement restriction to the discharge functional component 60 and suppressing the deformation of the portion of the first wall 23 where the discharge functional component 60 is located, which protrudes into the receiving cavity. Simultaneously, the limiting member 40 can guide the impact load originally concentrated on the first wall 23 to the main body of the casing, extending the impact load transmission path and dispersing the impact energy in a direction opposite to the first direction. This reduces the risk of deformation and cracking of the first wall 23, allowing the discharge functional component 60 to maintain stable installation and mitigating the risk of performance failure of the battery device.

[0095] Therefore, this embodiment improves the working reliability of the battery device by setting a discharge function component 60 at the bottom of the housing 20, and the battery device can meet higher bottom impact requirements.

[0096] Furthermore, compared with technical solutions that increase the overall thickness of the first wall 23 or increase the thickness of the first wall 23 at a local location corresponding to the receiving compartment 27, this embodiment can also make the box 20 lighter and reduce manufacturing costs.

[0097] According to some embodiments of this application, the main body of the casing includes a second wall 24, and the first wall 23 and the second wall 24 are disposed opposite each other along a first direction. The battery device may also include a fixing beam 30, which is fixedly connected to the second wall 24, and a limiting member 40 is fixedly connected to the fixing beam 30.

[0098] exist Figure 5 In this configuration, the second wall 24 is located above the first wall 23, and the second wall 24 is the top wall. For example, the limiting member 40 can be fixedly connected to the fixing beam 30 by screws 80. The fixing beam 30 can be any of the crossbeams or longitudinal beams within the box 20; in other words, the limiting member 40 can be fixedly connected to the crossbeams or longitudinal beams within the box 20.

[0099] In this embodiment, the limiting member 40 is indirectly fixedly connected to the main body of the box through its connection with the fixed beam 30. Thus, the fixed beam 30 provides the mounting base for the limiting member 40. Since the fixed beam 30 is connected to the second wall 24, when the bottom of the battery device is impacted, the impact force on the second wall 24 is relatively small. The fixed beam 30 acts as a stable fulcrum, participating in the force distribution and absorbing part of the impact energy. This allows the limiting member 40 to form a stable reverse constraint on the discharge function component 60, thereby limiting the upward displacement of the discharge function component 60.

[0100] According to some embodiments of this application, at least one end of the battery cell assembly 10 along the second direction abuts against the fixed beam 30, which (also referred to as an expansion beam) is used to resist the expansion force generated by the battery cell assembly 10. The receiving cavity is divided into a battery compartment 26 and a receiving compartment 27 by the fixed beam 30. The battery cell assembly 10 is received in the battery compartment 26, and the limiting member 40 and the discharge function component 60 are disposed in the receiving compartment 27; wherein, the second direction is perpendicular to the first direction.

[0101] In some embodiments, the battery device may include a fixed beam 30, which divides the receiving cavity into a battery compartment 26 and a receiving compartment 27.

[0102] In some embodiments, please refer to Figure 4The battery device may include two fixed beams 30, which extend along a third direction (see below). The two fixed beams 30 are arranged alternately along a second direction, and the battery cell assembly 10 is disposed between the two fixed beams 30. In this embodiment, the two ends of the battery cell assembly 10 along the second direction abut against the two fixed beams 30 respectively. Furthermore, in this embodiment, the receiving cavity is divided by the two fixed beams 30 into a battery compartment 26 and two receiving compartments 27. The portion of the first wall 23 corresponding to each of the two receiving compartments can be provided with a discharge function component 60. Taking the battery device as a cuboid shape as an example, the second direction can refer to the length direction of the battery device or the width direction of the battery device. The two receiving compartments 27 can be used to house electrical components (e.g., high-voltage boxes, battery management units, BMUs) and pipes 50 respectively, thus achieving electro-hydraulic separation. When the battery device of this embodiment is applied to an electric vehicle, the second direction can refer to the driving direction of the electric vehicle or a direction perpendicular to the driving direction of the electric vehicle. Figure 4 and Figure 5 In the middle, the second direction can be referred to the Y direction.

[0103] In this embodiment, the fixed beam 30 (expansion beam) provides a stable installation base for the limiting component 40, enabling the fixed beam 30 to serve multiple purposes.

[0104] The assembly process of the battery device in this embodiment can be as follows: providing a second housing 21, which is a hollow structure with an open bottom; placing the second housing 21 upside down on a workbench with the open end facing upwards; fixing the fixing beam 30 to the second housing 21; installing the battery cell 11 into the second housing 21; installing the pipe 50 into the second housing 21; connecting the limiting member 40 to the fixing beam 30 with screws 80; providing a first wall 23; moving the first wall 23 above the second housing 21 directly opposite the open end of the second housing 21; covering the open end of the second housing 21 with the first wall 23 to assemble the battery device; and flipping the battery device over.

[0105] According to some embodiments of this application, such as Figure 5 As shown, the fixed beam 30 is located at one end away from the second wall 24 along the first direction ( Figure 5 There is a gap 28 between the lower end of the battery compartment 26 and the first wall 23, and the battery compartment 26 and the storage compartment 27 are connected through the gap 28.

[0106] As described above, the venting function component 60 is a drain valve 61. The drain valve 61 is configured to open when the liquid level in the receiving cavity reaches a preset value, allowing the liquid in the receiving cavity to drain out of the housing 20; and to close when the liquid level in the receiving cavity does not reach the preset value, thus achieving a seal. In a specific application scenario, the bottom end of the battery cell 11 is provided with an end cap 112 and a pressure relief mechanism 130. The pressure relief mechanism 130 is located on the end cap 112. When the internal pressure or temperature of the battery cell 11 reaches a threshold, the pressure relief mechanism 130 is actuated, allowing the electrolyte, gas, and other discharges inside the battery cell 11 to be discharged into the battery compartment 26. The discharged electrolyte and other liquid discharges can flow through the gap 28 to the receiving chamber 27, and then be discharged out of the housing 20 via the drain valve 61.

[0107] By creating a gap 28 between the fixed beam 30 and the first wall 23, the fixed beam 30 and the first wall 23 do not abut against each other. This cuts off the transmission path of the impact force from the first wall 23 to the fixed beam 30, ensuring that the fixed beam 30 can serve as a stable fulcrum.

[0108] Figure 6 The diagram shows a partial structural schematic of a battery device omitting the first wall 23, as shown in a bottom-view perspective, according to some embodiments of this application. Please refer to [link to relevant documentation] for some embodiments of this application. Figure 6 The battery device may further include a heat exchange assembly and two pipes 50. At least a portion of the heat exchange assembly is located in the battery compartment 26 and exchanges heat with the battery cell assembly 10. The two pipes 50 are housed in a receiving chamber 27. One pipe 50 communicates with the inlet of the heat exchange assembly and is used to supply heat exchange fluid to the heat exchange assembly. The other pipe 50 communicates with the outlet of the heat exchange assembly and is used to discharge the heat exchange fluid. Furthermore, a portion of a limiting member 40 is located on the lower side of the pipe 50 along a first direction, and the limiting member 40 is configured to cover at least a portion of the outer periphery of at least one pipe 50.

[0109] The heat exchange assembly regulates the temperature of the battery cells 11 by exchanging heat with them. The heat exchange assembly can be implemented using any known technique, such as a liquid cooling plate or heat exchange tube. The heat exchange assembly can be partially located in the battery compartment 26 and partially extended into the housing compartment, or it can be entirely located in the battery compartment 26. Two pipes 50 are housed in the same housing compartment 27. Both pipes 50 are used to connect to an external heat exchange medium circulation device. The flow path of the heat exchange medium is approximately: heat exchange medium circulation device - one of the pipes 50 - heat exchange assembly inlet - heat exchange assembly - heat exchange assembly outlet - the other pipe 50 - heat exchange medium circulation device.

[0110] The phrase "the limiting member 40 is configured to cover at least a portion of the outer periphery of at least one pipe 50" indicates that the limiting member 40 can be a cylindrical member (e.g., a square tube structure, a cylindrical structure), the limiting member 40 is sleeved on the outer periphery of at least one pipe 50, or, with a cross-section perpendicular to the axis of the pipe 50 as its cross-section, the cross-sectional shape of the limiting member 40 can be a non-closed shape (e.g., a C-shape), the limiting member 40 can extend along the outer periphery of at least one pipe 50, and support at least one pipe 50 below it. In this embodiment, the orthographic projection of the limiting member 40 along the first direction onto the first wall 23 partially overlaps with the orthographic projection of at least one pipe 50 along the first direction onto the first wall 23. It is understood that in the embodiment where the limiting member 40 is a cylindrical member, the internal space of the cylindrical structure is used to accommodate the pipe 50.

[0111] Of course, in other embodiments, the orthographic projection of the limiting member 40 along the first direction onto the first wall 23 and the orthographic projection of at least one pipe 50 along the first direction onto the first wall 23 may not overlap. As an example, the limiting member 40 and the pipe 50 may be arranged sequentially along the second direction or along a third direction (see below), with the first direction, the second direction, and the third direction being perpendicular to each other.

[0112] In contrast, in the technical solution where the limiting member 40 is configured to cover at least a portion of the outer periphery of at least one pipe 50, the limiting member 40 occupies less space, improves the utilization of the internal space of the housing 20, and makes the structure of the battery device more compact.

[0113] Figure 7 This is a three-dimensional structural diagram of the limiting member 40 in some embodiments of this application. Figure 8 for Figure 7 The diagram shows a top view of the limiting member 40. Figure 9 for Figure 7 The diagram shown is a first-person view of the limiting member 40. Figure 10 for Figure 7 The diagram shown is a schematic representation of the limiting member 40 from a second-view perspective. Figure 7 In the text, the first-view perspective can be seen on P1, and the second-view perspective can be seen on P2. For some embodiments of this application, please refer to... Figures 7 to 10 The limiting member 40 can be configured to include a stop plate 41 and a connecting structure 42. The stop plate 41 is located on the lower side of the pipe 50 along the first direction. The stop plate 41 is disposed opposite to the first wall 23 along the first direction. The connecting structure 42 is connected to the stop plate 41 and is disposed on the side of the stop plate 41 away from the first wall 23. The connecting structure 42 is fixedly connected to the fixed beam 30.

[0114] The stop plate 41 is used to abut against the upper end of the venting functional component 60, and the limiting member 40 is fixedly connected to the fixed beam 30 through the connecting structure 42. The limiting member 40 also includes a connecting member 43, and the connecting structure 42 is connected to the stop plate 41 through the connecting member 43. In this embodiment, the specific structure of the limiting member 40 is varied. As an example, the connecting structure 42 can be an annular plate structure, and the connecting member 43 includes four wall plates connected end to end in sequence. The four wall plates correspond one-to-one with the four sides of the rectangular stop plate 41. One end (lower end) of each wall plate is connected to the corresponding side of the rectangular stop plate 41 and protrudes toward the second wall 24, and the other end (upper end) is connected to the annular plate structure. In this example, the limiting member 40 is a hollow structure with an open upper end. In order to avoid interference with the pipe 50, two wall plates arranged opposite each other along the axial direction of the pipe 50 can be provided with through holes for the pipe 50 to pass through.

[0115] The limiting component 40 can be a one-piece molded component, that is, the stop plate 41, the connecting structure 42, and the connector 43 are integrally molded. Alternatively, the stop plate 41 and the connector 43, as well as the connecting structure 42 and the connector 43, can be connected by welding, screwing, snap-fitting, or other methods.

[0116] In this embodiment, the stop plate 41 is a plate-shaped structure, which makes it easier for the stop plate 41 to make surface contact with the other end of the venting functional component 60. This helps to reduce the contact stress between the stop plate 41 and the venting functional component 60, and reduces the risk of damage to the venting functional component 60 due to excessive local stress between the stop plate 41 and the venting functional component 60 when the first wall 23 is impacted.

[0117] The structure of the fixed beam 30 is also diverse. In some embodiments, such as... Figure 5 As shown, the fixed beam 30 includes a first beam body 31 and a mounting portion 32. The first beam body 31 abuts against the battery cell 11 to limit the expansion of the battery cell 11. A gap 28 exists between the lower end of the first beam body 31 and the first wall 23. The mounting portion 32 is connected to the upper end of the first beam body 31 and the second wall 24. The mounting portion 32 has a connected first beam main plate 321 and a second beam main plate 322, with the second beam main plate 322 located below the first beam main plate 321 along a first direction. Further, the fixed beam 30 may also include a second beam body 33, which is disposed opposite to the first beam body 31 along a second direction, and the second beam body 33 is located on the side of the first beam body 31 away from the battery cell 11.

[0118] Based on some embodiments of this application, please refer to... Figure 5 , Figures 7 to 10The connecting structure 42 may include a first plate 421 and a second plate 422. The second plate 422 is located on the lower side of the first plate 421 along the first direction. The first plate 421 is opposite to and connected to the first beam main plate 321, and the second plate 422 is opposite to and connected to the second beam main plate 322.

[0119] In this embodiment, the dimensions of the first plate 421 and the stop plate 41 in the first direction are h1, and the dimensions of the second plate 422 and the stop plate 41 in the first direction are h2, where h1 > h2.

[0120] As described above, both the first plate 421 and the second plate 422 can be provided with connecting holes 423, through which screws 80 are connected to the fixed beam 30. The connecting member 43 may include a first connecting post 431 and a second connecting post 432 extending along a first direction. The first plate 421 can be connected to the stop plate 41 via the first connecting post 431, and the second plate 422 can be connected to the stop plate 41 via the second connecting post 432. There may be one or more first plates 421 and second plates 422, for example, in... Figure 7 In the middle, the first plate 421 consists of two parts, and the second plate 422 consists of one part. Figure 7 In the middle, the limiting member 40 includes two first plates 421, which are arranged sequentially along the axis of the pipe 50. Each first plate 421 is connected to two corners of the rectangular stop plate 41. Each first plate 421 can correspond to one or more first connecting posts 431. Each second plate 422 can correspond to one or more second connecting posts 432. Figure 7 In the middle, the second plate 422 is connected to the stop plate 41 through two second connecting posts 432, and the two second connecting posts 432 are located on both sides of the connecting hole 423 of the second plate 422 along the axial direction of the pipe 50.

[0121] exist Figures 7 to 10 In this configuration, the first plate 421 and the second plate 422 can be connected to the opposite two sides of the rectangular stop plate 41, respectively. Alternatively, the first plate 421 and the second plate 422 can also be connected to the adjacent two sides of the rectangular stop plate 41, respectively.

[0122] As a feasible embodiment, the first connecting post 431 and the second connecting post 432 can also be replaced with a plate structure, and the plate structure is connected to the side of the rectangular stop plate 41.

[0123] In this embodiment, based on the original fixed beam 30 structure (i.e., the fixed beam 30 still has a first beam main plate 321 and a second beam main plate 322, with the second beam main plate 322 located on the lower side of the first beam main plate 321 along the first direction), the connecting structure 42 is designed to include a first plate 421 and a second plate 422, with the second plate 422 located on the lower side of the first plate 421 along the first direction. This allows the limiting member 40 to adapt to the structure of the fixed beam 30, so that the limiting member 40 can be reliably connected to the fixed beam 30 without changing the structure of the fixed beam 30.

[0124] Please continue reading. Figure 7 The projection of the connecting hole 423 on the second plate 422 onto the first wall 23 along the first direction does not coincide with the projection of the stop plate 41 onto the first wall 23 along the first direction. Furthermore, the two second connecting posts 432 are located on either side of the connecting hole 423 on the second plate 422 along the axis of the pipe 50. This ensures that the stop plate 41 and the second connecting posts 432 do not obstruct the connecting hole 423 on the second plate 422, facilitating the passage of the screw 80 to connect with the second plate 422 and the fixing beam 30. Figure 5 During assembly, the screw 80 can be inserted from the bottom of the stop plate 41 into the space between the two second connecting posts 432, and then the screw 80 can be moved upward to pass through the connecting hole 423 on the second plate 422 and then connected to the fixed beam 30.

[0125] Of course, in other embodiments of this application, the limiting member 40 may also be fixedly connected to the first beam body 31 or the second beam body 33.

[0126] Please refer to some embodiments of this application. Figure 6 The limiting member 40 is provided with at least two, and the two pipes 50 are arranged sequentially along the third direction. At least a portion of the outer periphery of each pipe 50 is covered by a limiting member 40, and the third direction is parallel to the extension direction of the fixed beam 30.

[0127] Taking a rectangular battery device as an example, the third direction can be referred to as either the length or the width of the battery device. The first, second, and third directions can be perpendicular to each other. Figure 6 For the third-party direction, please refer to the X direction.

[0128] Based on the preceding description, "at least a portion of the outer periphery of each pipe 50 is covered by a limiting member 40" means that each pipe 50 corresponds to one limiting member 40. The limiting member 40 can be a cylindrical component (e.g., a square tube structure or a cylindrical structure). The limiting member 40 is fitted around the outer periphery of the corresponding pipe 50, or, with a cross-section perpendicular to the axis of the pipe 50 as its cross-section, the cross-sectional shape of the limiting member 40 can be a non-closed shape (e.g., C-shaped). The limiting member 40 can extend around the outer periphery of the corresponding pipe 50. The number of drain valves 61 can be the same as the number of limiting members 40, with each drain valve 61 corresponding to one limiting member 40.

[0129] In some embodiments, the receiving cavity is divided into a battery compartment 26 and two receiving compartments 27 by two fixed beams 30. Two pipes 50 are located in the same receiving compartment 27, and the other receiving compartment 27 is used to house electrical components. In this example, there may be more than three drain valves 61, with two drain valves 61 located on the first wall 23 corresponding to the position of the receiving compartment 27 where the pipes 50 are located, and the remaining drain valve 61 located on the first wall 23 corresponding to the position of the receiving compartment 27 where the electrical components are located. In a specific example, there may be four drain valves 61, with two drain valves 61 located on the first wall 23 corresponding to the position of the receiving compartment 27 where the pipes 50 are located, and the other two drain valves 61 located on the first wall 23 corresponding to the position of the receiving compartment 27 where the electrical components are located, and the four drain valves 61 correspond one-to-one with the four corner positions of the housing 20.

[0130] This embodiment makes the battery device structure more compact while allowing each pipe 50 to be supported by a corresponding limiting member 40.

[0131] According to some embodiments of this application, please refer to Figure 5 , Figures 7 to 10 The battery device may also include a buffer pad 70, which is disposed between the other end of the discharge function component 60 and the limiting member 40.

[0132] The buffer pad 70 can be made of at least one of the following materials that possess elasticity and damping properties: rubber, polyurethane (PU), foam, engineering plastics, etc. For example, the buffer pad 70 can be clamped between the limiting member 40 and the venting functional component 60. Alternatively, the buffer pad 70 can be bonded to the venting functional component 60 and / or the limiting member 40 using adhesive to fix it between the other end of the venting functional component 60 and the limiting member 40. The shape of the buffer pad 70 is not limited; for example, it can be in the shape of… Figure 7 The circle shown can also be square, oval, etc.

[0133] By providing a buffer pad 70, when the bottom of the battery device is impacted, the buffer pad 70 can absorb and dissipate part of the impact energy using its own compression deformation capability. Furthermore, in this embodiment, the other end of the discharge function component 60 is flexibly and indirectly abutted against the limiting member 40, thus reducing stress concentration and damage caused by rigid contact between the other end of the discharge function component 60 and the limiting member 40.

[0134] According to some embodiments of this application, the venting function component 60 may specifically be a drain valve 61, which is configured to drain liquid from the containment cavity.

[0135] The drain valve 61 is configured to open when the liquid volume in the receiving cavity reaches a preset value, allowing the liquid in the receiving cavity to be discharged outside the housing 20, and to close when the liquid volume in the receiving cavity does not reach the preset value, thereby achieving a seal. The drain valve 61 can be implemented using any known technical means.

[0136] Figure 11 This is a front view schematic diagram of the drain valve 61 in some embodiments of this application. Figure 12 for Figure 11 An exploded view of the drain valve 61 is shown. For example, please refer to... Figure 11 and Figure 12 The drain valve 61 includes a valve body 611 and a valve core (not shown in the figure). The valve body 611 has an inlet 612 and a drain outlet. The inlet 612 communicates with the receiving cavity, and the drain outlet communicates with the external environment of the housing 20. The valve core is movably coupled to the valve body 611 to open and close the drain outlet. When the drain valve 61 is in the open state, the drain outlet is open, and the inlet 612 and the drain outlet are connected; when the drain valve 61 is in the closed state, the inlet 612 and the drain outlet are not connected. The valve body 611 includes a valve body 6111 and a protrusion 6112. The protrusion 6112 is connected to one end of the valve body 6111 along a first direction (…). Figure 11 The lower end of the valve body 6111 is connected to the valve body 6112, and the protrusion 6112 extends away from the center line of the protrusion 6112 relative to the outer periphery of the valve body 6111. The drain valve 61 also includes a nut 613, which is sleeved on the valve body 611 and threadedly connected to the valve body 611. The distance between the nut 613 and the protrusion 6112 can be adjusted by tightening the nut 613 to adapt the drain valve 61 to mounting interfaces of different thicknesses. The drain valve 61 can be installed by tightening the nut 613, and the installation process is simple and convenient. It should be noted that when the drain valve 61 is applied to the housing 20, the protrusion 6112 is located outside the housing 20, and the rest of the drain valve 61 is located inside the receiving cavity.

[0137] When a battery cell 11 experiences thermal runaway, the thermally runaway battery cell 11 will release a large amount of gas and liquid (such as electrolyte) into the containment cavity when it erupts. By opening the drain valve 61, the erupted liquid can be discharged outside the housing 20, reducing the risk that the erupted liquid will cause other battery cells 11 to short circuit and lead to a chain reaction caused by the spread of thermal runaway.

[0138] During long-term use of the battery device, factors such as poor circulation of the liquid heat exchange medium, aging and failure of the seals of the heat exchange components, and damage to the pipeline 50 may cause the liquid heat exchange medium to leak into the housing 20. By opening the drain valve 61, the leaked liquid heat exchange medium can be discharged outside the housing 20, reducing the risk of the liquid heat exchange medium causing short circuits and thermal runaway in other battery cells 11.

[0139] In summary, in the event of thermal runaway of the battery cell 11 or leakage of the liquid heat exchange medium, the liquid in the housing 20 can be drained through the drain valve 61, thereby improving the reliability of the battery during use.

[0140] It should be understood that in related technologies, if the discharge function component 60 is a drain valve 61, when the bottom of the battery device is impacted, the portion of the bottom wall of the housing 20 corresponding to the containment chamber 27 is prone to significant local deflection, causing the drain valve 61 to shift upwards and preventing normal drainage. In this embodiment, in addition to reducing the risk of deformation and cracking of the first wall 23, ensuring the stable installation of the discharge function component 60, the drain valve 61 is also able to function normally.

[0141] According to some embodiments of this application, the battery cell assembly 10 includes a plurality of battery cells 11. Each battery cell 11 includes a housing 110 and a pressure relief mechanism 130. The pressure relief mechanism 130 is disposed at one end of the housing 110 facing the first wall 23. The pressure relief mechanism 130 is used to release the internal pressure of the battery cell when the internal pressure or temperature of the battery cell reaches a threshold.

[0142] The housing 110 includes a housing 111 and an end cap 112. The housing 111 has an opening, and the end cap 112 closes onto the opening of the housing 111. As an example, the housing 111 has an opening at its bottom end, and the housing 110 has one end cap 112 located at the bottom of the housing 111 and closing the opening. As an example, the housing 111 has openings at both its top and bottom ends, and the housing 110 has two end caps 112, which respectively close onto the top opening and the bottom opening of the housing 111. A pressure relief mechanism 130 is disposed on the end cap 112 that mates with the bottom opening. The pressure relief mechanism 130 may be a component such as an explosion-proof disc, a gas valve, a pressure relief valve, or a safety valve.

[0143] In this embodiment, the pressure relief mechanism 130 is positioned towards the first wall 23 where the drain valve 61 is located. This shortens the drain path of the liquid ejected from the battery cell 11 during thermal runaway, facilitating the rapid discharge of liquid emissions from the thermally runaway battery cell 11. Specifically, if the battery cell 11 experiences thermal runaway, the pressure relief mechanism 130 opens, allowing a large amount of gas and liquid to be ejected from the bottom of the battery cell 11. In this way, the liquid emissions flow from the bottom of the battery cell 11 to the drain valve 61.

[0144] According to some embodiments of this application, the battery device further includes an integrated busbar, which includes a busbar component. A plurality of battery cells 11 of the battery cell assembly 10 are connected through the busbar component. The integrated busbar is disposed on the side of the battery cell assembly 10 facing the first wall 23, and the drain valve 61 is located on the lower side of the integrated busbar along the first direction.

[0145] The integrated busbar is an electrical connection structure within the battery device. It is used to achieve high-voltage series and parallel connection of battery cells 11, temperature sampling of battery cells 11, voltage sampling of battery cells 11, and overcurrent protection. In some embodiments, the integrated busbar may also include a temperature sampling element. In this embodiment, the integrated busbar is located at the bottom of the battery cell assembly 10, and the drain valve 61 is located below the integrated busbar.

[0146] Using this technical solution, when water enters the housing 20 and the liquid level inside the housing 20 gradually rises, the drain valve 61, located below the integrated busbar, delays the time it takes for the liquid to contact the manifold components. This reduces the risk of a short circuit in the integrated busbar caused by the liquid, thus improving the reliability of the battery device during use. For example, in extreme wading conditions, when an electric vehicle using the battery device of this embodiment enters the housing 20 and the liquid level inside the housing 20 gradually rises, the electric vehicle leaves the wading area before the liquid level in the housing 20 reaches the integrated busbar. The liquid inside the housing 20 is then discharged to the outside of the housing 20 through the drain valve 61.

[0147] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0148] The electrical equipment includes vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc. It is understood that the electrical equipment provided in this application, because it uses any of the above-mentioned battery cells 11, has all the beneficial effects of the battery cells 11, which will not be elaborated here.

[0149] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0150] A specific embodiment of this application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be construed as limiting the scope of this application.

[0151] like Figures 4 to 10 As shown, the battery device includes: a battery cell assembly 10, a housing 20, two fixed beams 30, four limiting members 40, and four drain valves 61. The housing 20 includes a first wall 23 (bottom wall) and a second wall 24 (top wall) arranged opposite each other along its own gravity direction. The two fixed beams 30 are located in the receiving cavity of the housing 20 and are arranged opposite each other and spaced apart along the Y direction. The fixed beams 30 are connected to the second wall 24. There is a gap 28 between the lower end of the fixed beams 30 and the first wall 23. The receiving cavity is divided into a battery compartment 26 and two receiving compartments 27 by the two fixed beams 30. The battery compartment 26 communicates with the receiving compartments 27 through the gap 28. Along the Y direction, the battery compartment 26 is located between the two receiving compartments 27. The battery cell assembly 10 is arranged in the battery compartment 26. One of the receiving compartments 27 is used to receive two pipes 50 connected to the heat exchange assembly, and the other receiving compartment 27 is used to receive electrical components. Two pipes 50 are arranged sequentially along the X direction. One pipe 50 is connected to the inlet of the heat exchange component and is used to supply heat exchange fluid to the heat exchange component. The other pipe 50 is connected to the outlet of the heat exchange component and is used to discharge the heat exchange fluid.

[0152] The four drain valves 61 correspond one-to-one with the four corner positions of the cuboid box 20. Two drain valves 61 are located on the first wall 23 corresponding to the position of one of the containment chambers 27 where the pipe 50 is located, and the other two drain valves 61 are located on the first wall 23 corresponding to the position of the other containment chamber 27.

[0153] Four limiting members 40 correspond one-to-one with four drain valves 61. Two limiting members 40 are located in one of the receiving compartments 27, and the other two are located in the other receiving compartment 27. Each limiting member 40 includes a stop plate 41 and a connecting structure 42. The connecting structure 42 is connected to the stop plate 41 and located on the upper side of the stop plate 41. The connecting structure 42 is fixedly connected to the fixing beam 30 by screws 80. The stop plate 41 abuts against the upper end of the corresponding drain valve 61 to restrict the upward movement of the drain valve 61. The two limiting members 40 located in one of the receiving compartments 27 correspond one-to-one with two pipes 50. Each limiting member 40 is arranged along the outer periphery of the corresponding pipe 50, which improves the utilization of the internal space of the housing 20 and makes the structure of the battery device more compact.

[0154] Furthermore, a buffer pad 70 is provided between the stop plate 41 of each limiting member 40 and the upper end of the corresponding drain valve 61.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: Battery cell assembly; The housing includes a first wall and a housing body, the first wall and the housing body together enclosing a receiving cavity for accommodating the battery cell assembly, the first wall being located on the lower side of the battery cell assembly along a first direction; wherein, the first direction is parallel to the direction of gravity of the battery device; A limiting member is provided inside the receiving cavity and is fixedly connected to the box body; The venting functional component has one end fixedly connected to the first wall along the first direction and the other end abutting against the limiting member, which can restrict the movement of the venting functional component in the opposite direction of the first direction.

2. The battery device according to claim 1, characterized in that, The main body of the box includes a second wall, and the first wall and the second wall are disposed opposite to each other along the first direction; The battery device further includes a fixing beam, which is fixedly connected to the second wall, and the limiting member is fixedly connected to the fixing beam.

3. The battery device of claim 2, wherein At least one end of the battery cell assembly along the second direction abuts against the fixed beam, the fixed beam being used to resist the expansion force generated by the battery cell assembly; the receiving cavity is divided into a battery compartment and a receiving compartment by the fixed beam, the battery cell assembly is housed in the battery compartment, and the limiting member and the discharge function component are disposed in the receiving compartment; wherein, the second direction is perpendicular to the first direction.

4. The battery device of claim 3, wherein The fixed beam has a gap between its end away from the second wall along the first direction and the first wall, and the battery compartment and the receiving compartment are connected through the gap.

5. The battery device of claim 3, wherein The battery device also includes: A heat exchange assembly, at least partially located in the battery compartment and exchanging heat with the individual battery cells; and Two pipes are housed in the containment chamber, one of which is connected to the inlet of the heat exchange assembly and is used to supply heat exchange fluid to the heat exchange assembly, and the other pipe is connected to the outlet of the heat exchange assembly and is used to discharge the heat exchange fluid. A portion of the limiting member is located on the lower side of the pipe along the first direction, and the limiting member is configured to cover at least a portion of the outer periphery of at least one of the pipes.

6. The battery device of claim 5, wherein The limiting component includes: A stop plate, located on the lower side of the pipe along the first direction, is disposed opposite to the first wall along the first direction; and A connecting structure is provided on the stop plate and located on the side of the stop plate away from the first wall, and the connecting structure is fixedly connected to the fixed beam.

7. The battery device of claim 6, wherein The fixed beam has a first beam main board and a second beam main board, the second beam main board being located below the first beam main board along the first direction; The connection structure includes a first plate and a second plate. The second plate is located below the first plate along the first direction. The first plate is opposite to and connected to the first beam main plate, and the second plate is opposite to and connected to the second beam main plate.

8. The battery device of claim 5, wherein, At least two limiting members are provided, and the two pipes are arranged sequentially along a third direction. At least a portion of the outer periphery of each pipe is covered by one of the limiting members, and the third direction is parallel to the extension direction of the fixed beam.

9. The battery device according to any one of claims 1 to 8, characterized by, The battery device also includes a buffer pad, which is disposed between the other end of the discharge function component and the limiting member.

10. The battery device according to any one of claims 1 to 8, characterized by, The venting component is a drain valve, which is configured to drain the liquid from the containment cavity.

11. The battery device of claim 10, wherein, The battery cell assembly includes multiple battery cells. Each battery cell includes a housing and a pressure relief mechanism. The pressure relief mechanism is located at one end of the housing facing the first wall. The pressure relief mechanism is used to release the internal pressure of the battery cell when the internal pressure or temperature of the battery cell reaches a threshold.

12. The battery device of claim 11, wherein, The battery device further includes an integrated busbar, which includes a busbar component. The plurality of battery cells of the battery cell assembly are connected through the busbar component. The integrated busbar is disposed on the side of the battery cell assembly facing the first wall, and the drain valve is located on the lower side of the integrated busbar along the first direction.

13. An electrical device, characterized by The electrical equipment includes a battery device as described in any one of claims 1 to 12, the battery device being used to provide electrical energy.

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