Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body which comprises side beams, and a plurality of side beams are connected end to end to form an accommodating space; the battery monomers are arranged in the accommodating space; the heat exchange assembly comprises a heat exchange mechanism and a flow collecting cavity, the heat exchange mechanism is arranged in the accommodating space and is in heat conduction connection with the battery monomers, the flow collecting cavity is arranged in at least one edge beam and is used for accommodating a heat exchange medium, and the heat exchange mechanism is communicated with the flow collecting cavity so that the heat exchange medium can circulate between the flow collecting cavity and the heat exchange mechanism; according to the battery device, the flow collecting cavity is integrated in the edge beam, an independent flow collecting pipe does not need to be additionally arranged in the box body, the risk of leakage of a heat exchange medium in the flow collecting cavity is improved, the flow collecting cavity is integrated in the frame, the stability of the flow collecting cavity is improved, the risk of damage of the flow collecting cavity under the action of external force is reduced, and the reliability of the battery device is improved.

Description

Technical Field

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

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In related technologies, heat exchange components are often installed inside the battery box to balance the temperature of the individual battery cells so that the battery device can operate stably. However, the heat exchange components are prone to leakage during operation and are easily damaged by external forces, which can lead to battery device failure and affect the reliability of the battery device. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can improve the problems of leakage of heat exchange components and easy damage of heat exchange components under external force, thereby improving the reliability of the battery device.

[0005] In a first aspect, this application provides a battery device, comprising: a housing including side beams, wherein multiple side beams are connected end to end to form a receiving space; a battery cell disposed within the receiving space; and a heat exchange assembly including a heat exchange mechanism and a heat collection cavity, wherein the heat exchange mechanism is disposed within the receiving space and is thermally connected to the battery cell, wherein the heat collection cavity is disposed within at least one side beam, the heat collection cavity is used to contain a heat exchange medium, and the heat exchange mechanism is connected to the heat collection cavity.

[0006] In the embodiment of this application, the battery device includes a housing, battery cells, and a heat exchange assembly. The housing includes side beams, and multiple side beams are connected end to end to form a receiving space. The heat exchange assembly includes a heat exchange mechanism and a collector cavity. The heat exchange mechanism and battery cells are disposed within the receiving space. The heat exchange mechanism and battery cells are thermally connected to regulate the temperature of the battery cells. The collector cavity for receiving the heat exchange medium is disposed within at least one side beam. The heat exchange mechanism is connected to the collector cavity so that the heat exchange medium can flow between the collector cavity and the heat exchange mechanism. By integrating the collector cavity into the side beam, there is no need to set up an independent collector pipe in the housing, which improves the risk of heat exchange medium leakage in the collector cavity. Furthermore, by integrating the collector cavity into the frame, the stability of the collector cavity is improved, the risk of damage to the collector cavity under external force is reduced, and the reliability of the battery device is improved.

[0007] In some embodiments, the side beam includes a first beam and a second beam connected to each other, the second beam being disposed on the side of the first beam facing the battery cell, and the current collector being disposed within the second beam.

[0008] In the embodiment of this application, the second beam is disposed on the side of the first beam facing the battery cell, and the current collection cavity is disposed in the second beam. The second beam is separated from the external environment by the first beam, which reduces the risk of leakage of heat exchange medium in the current collection cavity when external force is applied to the outer wall of the housing, and improves the reliability of the heat exchange components and battery device.

[0009] In some embodiments, the housing further includes a base plate, a side beam connected to one side of the base plate in its thickness direction, and a second beam disposed at one end of the first beam near the base plate.

[0010] In the embodiment of this application, the box body also includes a bottom plate, a side beam is connected to one side of the bottom plate in its thickness direction, and a second beam is disposed at the end of the first beam near the bottom plate to lower the center of gravity of the first beam and improve the connection stability between the first beam and the bottom plate.

[0011] In some embodiments, the heat exchange mechanism includes a body and a connecting pipe. The body and the battery cell are thermally connected. The connecting pipe includes a first end and a second end that are disposed opposite to each other. The first end is connected to the body, and the second end is connected to the collector cavity. A second beam is disposed between the first end and the base plate.

[0012] In the embodiment of this application, the heat exchange mechanism includes a body and a connecting pipe. The body and the battery cell are thermally connected to regulate the temperature of the battery cell. The connecting pipe includes a first end that communicates with the body and a second end that communicates with the collector cavity. The second beam is disposed between the first end and the bottom plate. After the heat exchange mechanism is installed in the housing, the second end of the connecting pipe can extend toward the bottom plate to communicate with the collector cavity, which reduces the difficulty of connecting the heat exchange mechanism and the collector cavity.

[0013] In some embodiments, the connecting pipe is connected to the manifold via the side surface of the second beam away from the bottom plate.

[0014] In the embodiment of this application, the connecting pipe is connected to the flow collection cavity through the surface of the second beam away from the bottom plate, so as to reduce the assembly difficulty of the connecting pipe and the second beam, shorten the size of the connecting pipe, and reduce the cost of the heat exchange component.

[0015] In some embodiments, the manifold includes two sub-chambers disposed at a distance within the second beam, and the two sub-chambers are connected to the same end of the heat exchange mechanism in its extension direction.

[0016] In the embodiment of this application, the current collector includes two sub-chambers spaced apart within the second beam, so that the heat exchange medium can be input into the heat exchange mechanism from one sub-chamber and output from the heat exchange mechanism to the other sub-chamber. The two sub-chambers are connected to the same end of the heat exchange mechanism in its extension direction, which helps to reduce the overall size of the heat exchange mechanism in its extension direction and improve the internal space utilization of the battery device.

[0017] In some embodiments, multiple side beams are connected end to end in a direction perpendicular to the first direction to form a receiving space. The heat exchange mechanism includes a body and a connecting pipe. The body and the battery cell are thermally connected. One end of the connecting pipe is connected to the body, and the other end extends along the first direction and is connected to the collector cavity.

[0018] In the embodiment of this application, the heat exchange mechanism includes a body and a connecting pipe. One end of the connecting pipe is connected to the body, and the other end extends along the first direction and is connected to the collection cavity. The body and the collection cavity have a larger operating space in the first direction, which can reduce the difficulty of connecting the heat exchange mechanism and the frame.

[0019] In some embodiments, the housing includes a connector that connects to and protrudes from the surface of the side beam, and a connecting pipe is connected to the connector to communicate the manifold and the body.

[0020] In the embodiment of this application, the connector is connected to the side beam and protrudes from the surface of the side beam. The connecting pipe is connected to the connector to connect the flow collection cavity and the main body. The connector protruding from the surface of the side beam will not occupy the space of the flow collection cavity, and will reduce the assembly difficulty of the connector and the connecting pipe, making it convenient to match the connector and the connecting pipe.

[0021] In some embodiments, the heat exchange assembly further includes a seal disposed between the connecting pipe and the connector.

[0022] In the embodiments of this application, a seal is disposed between the connecting pipe and the connector to improve the sealing performance between the connecting pipe and the connector and reduce the risk of leakage of the heat exchange component.

[0023] In some embodiments, the length of the connecting pipe is adjustable, and / or the connecting pipe is flexible.

[0024] In the embodiments of this application, the length of the connecting pipe is adjustable so that the heat exchange component can be adapted to battery cells of different sizes, thereby improving the compatibility of the heat exchange component; and / or the connecting pipe is flexible to absorb the processing errors of the connecting pipe and the side beam, thereby reducing the difficulty of connecting the heat exchange mechanism and the collector cavity.

[0025] Secondly, embodiments of this application provide an electrical device, including the battery device described in the first aspect embodiment. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of a battery provided in one embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of a battery module provided in one embodiment of the application;

[0030] Figure 4 This is an exploded view of a single battery cell provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0032] Figure 6 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application;

[0033] Figure 7 yes Figure 5 Enlarged view of point A in the middle;

[0034] Figure 8 This is a partial structural schematic diagram of a battery device provided in another embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Vehicle; 101. Motor; 102. Controller;

[0037] 2. Battery device; 201. Battery module;

[0038] 202. Enclosure; 2021. First enclosure; 2022. Second enclosure; 2023. Storage space; 2024. Base plate; 2025. Connecting parts;

[0039] 3. Battery cells;

[0040] 4. Edge beam; 41. First beam body; 42. Second beam body;

[0041] 5. Heat exchange assembly; 51. Heat exchange mechanism; 52. Manifold; 511. Body; 512. Connecting pipe; 5121. First end; 5122. Second end; 521. Sub-chamber; 53. Sealing element;

[0042] 6. Housing; 7. Electrode assembly; 71. Electrode tab; 72. Electrode body; 8. Top cover assembly;

[0043] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0044] 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.

[0045] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0046] 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", "circumferential", etc., 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 do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied 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 battery device applications, market demand is also constantly increasing.

[0051] In related technologies, heat exchange components are often installed inside the battery box to balance the temperature of the individual battery cells so that the battery device can operate stably. However, the heat exchange components are prone to leakage during operation and are easily damaged by external forces.

[0052] The above problems are due to the fact that the heat exchange components include a heat exchange medium input to each heat exchange mechanism and a manifold that carries the heat exchange medium output from the heat exchange mechanism. The manifold is independent of the heat exchange mechanism and the side beam. When the box is subjected to external impact, the manifold is also prone to deformation and damage due to the external impact. In addition, the manifold is spliced ​​from multiple connecting pipes, and leakage is prone to occur at its splicing surface.

[0053] To address the aforementioned issues, this application provides a battery device comprising a housing, individual battery cells, and a heat exchange assembly. The housing includes side beams connected end-to-end to form a receiving space. The heat exchange assembly includes a heat exchange mechanism and a collector cavity. The heat exchange mechanism and individual battery cells are disposed within the receiving space, and are thermally connected to regulate the temperature of the individual battery cells. A collector cavity for receiving the heat exchange medium is disposed within at least one side beam, and the heat exchange mechanism is connected to the collector cavity to allow the heat exchange medium to circulate between the collector cavity and the heat exchange mechanism. By integrating the collector cavity into the side beam, there is no need to additionally install a separate collector pipe within the housing, thus reducing the risk of heat exchange medium leakage within the collector cavity. Furthermore, by integrating the collector cavity into the frame, the stability of the collector cavity is improved, the risk of damage to the collector cavity under external forces is reduced, and the reliability of the battery device is enhanced.

[0054] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0055] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0056] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0057] The battery cell 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. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to this either.

[0058] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack. A battery pack generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0059] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer, the latter coated on the surface of the current collector. The current collector includes a positive current-collecting section and a positive electrode tab connected to it. The current-collecting section is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer being coated on the surface of the negative current collector. The negative current collector includes a negative current collection section and a negative electrode tab connected to the negative current collection section. The negative current collection section is coated with the negative active material layer, while the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes negative active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0060] 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.

[0061] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1 provided in some embodiments of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 2 is installed inside vehicle 1, and the battery device 2 can be located at the bottom, front, or rear of vehicle 1. The battery device 2 can be used to power vehicle 1; for example, the battery device 2 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 102 and a motor 101. The controller 102 is used to control the battery to supply power to the motor 101, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0062] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0063] Figure 2 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown.

[0064] The battery device 2 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 3, which are connected in series, parallel, or mixed connections via a busbar.

[0065] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 3.

[0066] As an example, the battery cell assembly can be a battery module 201, which is formed by arranging and fixing multiple battery cells 3 to form an independent module. As an example, the battery module 201 can be formed by binding multiple battery cells 3 together with cable ties.

[0067] In some embodiments, the battery device may be a battery pack, which includes a housing 202 and one or more battery cell assemblies housed in the housing 202.

[0068] As an example, the battery cell assembly can be a battery module 201, which can be housed in the housing by fixing the battery module 201 in the housing.

[0069] As an example, the battery cell assembly can also be housed in the housing 202 by directly fixing multiple battery cells 3 to the housing 202.

[0070] As an example, the housing 202 may include a first housing 2021 and a second housing 2022. The first housing 2021 and the second housing 2022 are fastened together, forming a closed space inside the housing 202 to house the battery cell assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 2021 may be a top cover or a bottom plate.

[0071] As an example, the housing 202 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 202 forms an enclosed space to accommodate the battery cell assembly.

[0072] In some embodiments, the housing 202 may be part of the vehicle's chassis structure. For example, a portion of the housing 202 may be at least a portion of the vehicle's floor, or a portion of the housing 202 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0073] Figure 3 A schematic diagram of the structure of a battery module 201 according to an embodiment of this application is shown.

[0074] In some embodiments, such as Figure 2 and Figure 3As shown, there are multiple battery cells 3. These multiple battery cells 3 are first connected in series, parallel, or in a mixed manner to form a battery module 201. The multiple battery modules 201 are then connected in series, parallel, or in a mixed manner to form a whole, which is housed in the casing 202.

[0075] Multiple battery cells 3 in the battery module 201 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 3 in the battery module 201.

[0076] Figure 4 This is an exploded view of a battery cell 3 provided in an embodiment of this application. The battery cell 3 refers to the smallest unit that makes up a battery. Figure 4 The battery cell 3 includes a top cover assembly 8, a housing 6, and an electrode assembly 7.

[0077] Electrode assembly 7 is the component in the battery cell 3 where electrochemical reactions occur. The casing 6 may contain one or more electrode assemblies 7. Electrode assembly 7 is mainly formed by winding or stacking electrode sheets, which are divided into positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body 72, while the portions of the positive and negative electrode sheets without active material each constitute a tab 71. The positive and negative tabs can be located together at one end of the electrode body 72 or separately at both ends of the electrode body 72. During the charging and discharging process of the battery cell 3, the positive and negative active materials react with the electrolyte, and the tabs 71 connect to the electrode terminals to form a current loop.

[0078] The electrode assembly 7 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0079] In some embodiments, the electrode assembly 7 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0080] In some embodiments, the electrode assembly 7 is a stacked structure. As an example, multiple positive and negative electrodes can be provided, with multiple positive and multiple negative electrodes stacked alternately. Multiple spacers can be provided and respectively provided between any adjacent positive or negative electrodes. Alternatively, the spacers can be provided continuously and provided between any adjacent positive or negative electrodes by folding.

[0081] In some embodiments, the electrode assembly 7 may be cylindrical, flat, or polygonal in shape.

[0082] In some embodiments, the electrode assembly 7 is provided with tabs 71, which can conduct current from the electrode assembly 7. The tabs 71 include a positive tab 71 and a negative tab 71.

[0083] The battery cell 3 may include a housing 6. The housing 6 is an assembly used to cooperate with the top cover assembly 8 to form the internal environment of the battery cell 3, wherein the formed internal environment can accommodate the electrode assembly 7, electrolyte (not shown in the figure), and other components. The housing 6 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 6), or an aluminum-plastic film, etc. In some embodiments, the housing 6 can be a sealed structure or a non-sealed structure. As an example, when the housing 6 is a non-sealed structure, the housing 6 serves to protect the electrode assembly 7, and a sealing bag is also included between the housing 6 and the electrode assembly 7. The sealing bag is used to encapsulate the electrode assembly 7 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the housing 6 is a sealed structure, it is used to encapsulate the electrode assembly 7 and electrolyte, etc.

[0084] As an example, the battery cell 3 can be a cylindrical battery cell 3, a prismatic battery cell 3, a pouch battery cell 3, or a battery cell 3 of other shapes. The prismatic battery cell 3 includes a square battery cell 3, a blade-shaped battery cell 3, and a multi-prismatic battery device 2. The multi-prismatic battery device 2 is, for example, a hexagonal prismatic battery device 2, etc. There are no particular limitations in this application.

[0085] The housing 6 and the top cover assembly 8 can be independent components. One or more openings can be provided on the housing 6, and one or more top cover assemblies 8 can close the openings to form the internal environment of the battery cell 3. Optionally, the top cover assembly 8 and the housing 6 can also be integrated. Optionally, the top cover assembly 8 and the housing 6 can form a common connection surface before other components are inserted into the housing, and the top cover assembly 8 closes the housing 6 when it is necessary to encapsulate the interior of the housing 6.

[0086] In some embodiments, the electrode terminals can be disposed on the top cover assembly 8 or on the housing 6, and the electrode terminals are electrically connected to the tabs 71. The electrode terminals can be directly connected to the tabs 71 or indirectly connected to the tabs 71 through an adapter mechanism.

[0087] Please see Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application; Figure 6 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application.

[0088] Firstly, such as Figure 5 and Figure 6As shown, this application provides a battery device 2, which includes a housing 202, a battery cell 3, and a heat exchange assembly 5. The housing 202 includes side beams 4, and multiple side beams 4 are connected end to end to form a receiving space 2023. The battery cell 3 is disposed in the receiving space 2023. The heat exchange assembly 5 includes a heat exchange mechanism 51 and a heat collection cavity 52. ​​The heat exchange mechanism 51 is disposed in the receiving space 2023 and is thermally connected to the battery cell 3. The heat collection cavity 52 is disposed in at least one side beam 4 and is used to contain the heat exchange medium. The heat exchange mechanism 51 is connected to the heat collection cavity 52.

[0089] In the embodiment of this application, the battery device 2 includes a housing 202, a battery cell 3, and a heat exchange assembly 5. The housing 202 includes side beams 4, and multiple side beams 4 are connected end to end to form a receiving space 2023. The heat exchange assembly 5 includes a heat exchange mechanism 51 and a collector cavity 52. ​​The heat exchange mechanism 51 and the battery cell 3 are disposed within the receiving space 2023. The heat exchange mechanism 51 and the battery cell 3 are thermally connected to regulate the temperature of the battery cell 3. The collector cavity 52 for containing the heat exchange medium is disposed within at least one side beam 4. The heat exchange mechanism 51 is connected to the collector cavity 52 so that the heat exchange medium can flow between the collector cavity 52 and the heat exchange mechanism 51. By integrating the collector cavity 52 into the side beam 4, there is no need to set up an independent collector pipe in the housing 202, which improves the risk of heat exchange medium leakage in the collector cavity 52. ​​Furthermore, by integrating the collector cavity 52 into the frame, the stability of the collector cavity 52 is improved, the risk of damage to the collector cavity 52 under external force is reduced, and the reliability of the battery device 2 is improved.

[0090] The box body 202 includes multiple side beams 4. The number of side beams 4 can be designed by the user. For example, four side beams 4 are spaced apart along the length and width of the box body 202 to form a receiving space 2023, or five, six or eight equal side beams 4 are connected end to end to form a receiving space 2023.

[0091] The heat exchange assembly 5 includes a heat exchange mechanism 51 and a collector cavity 52. ​​The heat exchange mechanism 51 and the battery cell 3 are disposed within the accommodating space 2023. When the heat exchange mechanism 51 and the battery cell 3 are thermally connected, the heat exchange mechanism 51 and the battery cell 3 are in direct contact, or the heat exchange mechanism 51 and the battery cell 3 are spaced apart. The heat exchange mechanism 51 and the battery cell 3 are connected through a thermally conductive medium, which can be a thermally conductive colloid, air, or metal, etc.

[0092] For example, multiple battery cells 3 are arranged in rows and columns along the second direction Y and the third direction Z. The heat exchange mechanism 51 extends along the second direction Y and is thermally connected to the battery cells 3. A flow collection cavity 52 is provided in the side beam 4 at the end of the housing 202 in the second direction Y to shorten the distance between the heat exchange mechanism 51 and the flow collection cavity 52 and facilitate the connection between the heat exchange mechanism 51 and the flow collection cavity 52; or the heat exchange mechanism 51 extends along the third direction Z and is thermally connected to the battery cells 3. A flow collection cavity 52 is provided in the side beam 4 at the end of the housing 202 in the third direction Z to shorten the distance between the heat exchange mechanism 51 and the flow collection cavity 52 and facilitate the connection between the heat exchange mechanism 51 and the flow collection cavity 52.

[0093] The housing 202 includes multiple side beams 4, and at least two collection cavities 52 are arranged at intervals in these multiple side beams 4. The heat exchange medium is input into the heat exchange mechanism 51 through one collection cavity 52 and exchanges heat with the battery cell 3. Then the heat exchange medium is output into the other collection cavity 52 through the heat exchange mechanism 51.

[0094] The side beam 4 is equipped with an input mechanism and an output mechanism. The input mechanism and the output mechanism are respectively connected to a flow collection cavity 52. ​​The heat exchange medium is input into the flow collection cavity 52 by the input mechanism, and the heat exchange medium in the flow collection cavity 52 is output to the outside by the output mechanism.

[0095] Optionally, the shape and dimensions of the flow collector 52 inside the side beam 4 and the capacity of the heat exchange medium inside the flow collector 52 can be designed independently. For example, the flow collector 52 can be cylindrical or cubic. The heat exchange medium can be water, ethanol, ethylene glycol, etc.

[0096] For example, the side beam 4 is a hollow column formed by bending a base material, and the hollow cavity of the side beam 4 is directly used as the flow collection cavity 52 to reduce the difficulty of setting up the flow collection cavity 52; or a separate containment structure for containing the heat exchange medium is set in the hollow cavity of the side beam 4, and the containment structure is fixed to the side beam 4 to reduce the risk of heat exchange medium leakage.

[0097] Optionally, a heat exchange medium can flow between the heat exchange mechanism 51 and the collection chamber 52 to make the side beam 4 and the heat exchange mechanism 51 conductive. This eliminates the need for additional independent conductive components and achieves equipotential between the side beam 4 and the heat exchange mechanism 51, thereby reducing the material cost of the battery device 2.

[0098] Optionally, in related technologies, multiple connecting pipes are spliced ​​together to form a complete current collector. Due to the size of the connecting pipes, the thickness of a single battery cell 3 cannot be made too thin. Therefore, in this embodiment, the current collector 52 is integrated into the side beam 4, so that the size of the connecting pipes no longer limits the thickness of the battery cell 3, and the heat exchange component 5 of this embodiment can accommodate battery cells 3 with greater thickness.

[0099] In some embodiments, such as Figure 5 and Figure 6 As shown, the side beam 4 includes a first beam 41 and a second beam 42 that are connected to each other. The second beam 42 is located on the side of the first beam 41 facing the battery cell 3, and the current collector 52 is located inside the second beam 42.

[0100] In these embodiments, the second beam 42 is disposed on the side of the first beam 41 facing the battery cell 3, and the current collection cavity 52 is disposed inside the second beam 42. The first beam 41 separates the second beam 42 from the external environment, reducing the risk of heat exchange medium leakage in the current collection cavity 52 when external force acts on the outer wall of the housing 202, and improving the reliability of the heat exchange assembly 5 and the battery device 2.

[0101] Optionally, the first beam 41 and the second beam 42 are integrally formed to enhance the structural strength of the side beam 4; or the first beam 41 and the second beam 42 are welded together to facilitate adjustment of the dimensions of the first beam 41 and the second beam 42.

[0102] The dimensions of the first beam 41 and the second beam 42 can be designed independently. The second beam 42 is located on the side of the first beam 41 facing the battery cell 3. When the current collection cavity 52 is located on the second beam 42, the first beam 41 separates the current collection cavity 52 from the external environment. In this way, when the outside of the battery device 2 is impacted during use and transportation, the risk of damage and leakage of the current collection cavity 52 is reduced.

[0103] For example, four side beams 4 are connected end to end to form a housing space 2023, and four first beams 41 are connected end to end to form a housing space 2023. Two first beams 41 are arranged on the side of the two or one first beams 41 facing the battery cell 3, so as to save the internal space of the box 202 and improve the energy density of the battery device 2.

[0104] Optionally, the box body 202 also includes a mounting beam, which is located on the side of the first beam 41 opposite to the second beam 42, and the box body 202 is mounted at the installation position via the mounting beam.

[0105] In some embodiments, such as Figure 5 and Figure 6 As shown, the box body 202 also includes a bottom plate 2024, a side beam 4 connected to one side of the bottom plate 2024 in its thickness direction, and a second beam 42 disposed at one end of the first beam 41 near the bottom plate 2024.

[0106] In these embodiments, the box body 202 also includes a bottom plate 2024, a side beam 4 connected to one side of the bottom plate 2024 in its thickness direction, and a second beam 42 disposed at one end of the first beam 41 near the bottom plate 2024 to lower the center of gravity of the first beam 41 and improve the connection stability between the first beam 41 and the bottom plate 2024.

[0107] Optionally, the second beam 42 is disposed at the end of the first beam 41 near the bottom plate 2024. The first beam 41 and the second beam 42 are connected to the bottom plate 2024 together to increase the contact area between the side beam 4 and the bottom plate 2024 and improve the stability of the side beam 4.

[0108] Optionally, the heat exchange mechanism 51 is connected to the side of the second beam 42 away from the bottom plate 2024 or the heat exchange mechanism 51 is connected to the side of the second beam 42 facing the battery cell 3.

[0109] Please see Figure 7 , Figure 7 yes Figure 5 Enlarged diagram of point A in the middle.

[0110] In some embodiments, such as Figures 5 to 7 As shown, the heat exchange mechanism 51 includes a body 511 and a connecting pipe 512. The body 511 is thermally connected to the battery cell 3. The connecting pipe 512 includes a first end 5121 and a second end 5122 that are arranged opposite to each other. The first end 5121 is connected to the body 511, and the second end 5122 is connected to the collector cavity 52. ​​The second beam 42 is disposed between the first end 5121 and the base plate 2024.

[0111] In these embodiments, the heat exchange mechanism 51 includes a body 511 and a connecting pipe 512. The body 511 is thermally connected to the battery cell 3 to regulate the temperature of the battery cell 3. The connecting pipe 512 includes a first end 5121 that communicates with the body 511 and a second end 5122 that communicates with the collector cavity 52. ​​The second beam 42 is disposed between the first end 5121 and the base plate 2024. After the heat exchange mechanism 51 is installed in the housing 202, the second end 5122 of the connecting pipe 512 can extend toward the base plate 2024 to communicate with the collector cavity 52, which reduces the difficulty of connecting the heat exchange mechanism 51 and the collector cavity 52.

[0112] The heat exchange mechanism 51 includes a body 511 and a connecting pipe 512. The contact area between the body 511 and the battery cell 3 is larger than the contact area between the connecting pipe 512 and the battery cell 3, or in other words, the projected area of ​​the body 511 on the battery cell 3 is larger than the contact area of ​​the connecting pipe 512 on the battery cell 3, to facilitate heat exchange between the body 511 and the battery cell 3. The connecting pipe 512 is a rigid component, and an exemplary connecting pipe 512 is a metal pipe, to improve the reliability of the heat exchange mechanism 51; the connecting pipe 512 is also a flexible component, and an exemplary connecting pipe 512 is a flexible pipe, to facilitate communication between the body 511 and the manifold 52.

[0113] The second beam 42 is disposed at one end of the first beam 41 near the bottom plate 2024. The first end 5121 of the connecting pipe 512 is connected to the body 511. The second beam 42 is disposed between the first end 5121 and the bottom plate 2024 so that after the heat exchange mechanism 51 and the box 202 are assembled, the second end 5122 of the connecting pipe 512 can extend toward the bottom plate 2024 in the first direction X to communicate with the collection cavity 52 in the second beam 42.

[0114] In some embodiments, such as Figure 5 and Figure 6 As shown, the connecting pipe 512 is connected to the flow collection cavity 52 through the side surface of the second beam 42 away from the bottom plate 2024.

[0115] In these embodiments, the connecting pipe 512 is connected to the flow collection cavity 52 through the side surface of the second beam 42 away from the bottom plate 2024, so as to reduce the assembly difficulty of the connecting pipe 512 and the second beam 42, and shorten the size of the connecting pipe 512, thereby reducing the cost of the heat exchange assembly 5.

[0116] Optionally, in the direction from the first beam 41 to the battery cell 3, the extension dimension of the second beam 42 is between 5mm and 30mm, so that the surface of the second beam 42 facing the base plate 2024 can be easily connected to the connecting pipe 512. For example, the extension dimension of the second beam 42 is 5mm, 10mm, 20mm or 30mm, etc.

[0117] Please see Figure 8 , Figure 8 This is a partial structural schematic diagram of a battery device provided in another embodiment of this application.

[0118] In some embodiments, such as Figure 5 , Figure 6 and Figure 8 As shown, the flow collection cavity 52 includes two sub-chambers 521, which are spaced apart within the second beam 42 and are connected to the same end of the heat exchange mechanism 51 in its extension direction.

[0119] In these embodiments, the collector cavity 52 includes two sub-chambers 521 spaced apart within the second beam 42, so that the heat exchange medium can be input into the heat exchange mechanism 51 from one sub-chamber 521 and the heat exchange medium can be output from the heat exchange mechanism 51 to the other sub-chamber 521. The two sub-chambers 521 are connected to the same end of the heat exchange mechanism 51 in its extension direction, which helps to reduce the overall size of the heat exchange mechanism 51 in its extension direction, thereby improving the internal space utilization of the battery device 2.

[0120] The heat exchange mechanism 51 includes a main body 511 and two connecting pipes 512, which are used for inputting and outputting heat exchange medium, respectively. Two sub-chambers 521 are set in the collection chamber 52, and each sub-chamber 521 is connected to the main body 511 through an independent connecting pipe 512, so that the heat exchange medium can flow between the sub-chambers 521, the connecting pipes 512 and the main body 511. In this way, only one side beam 4 needs to be set to reduce the difficulty of setting the side beam 4, and the size of the second side beam 4 near the end of the side beam 4 near the main body 511 where the connecting pipes 512 are not set can be reduced, so as to increase the internal space size of the box 202.

[0121] Optionally, the first ends 5121 of the two connecting pipes 512 are spaced apart along the first direction X, the side beam 4 extends along the second direction Y, and the two sub-chambers 521 are spaced apart along the third direction Z, or the side beam 4 extends along the third direction Z, the two sub-chambers 521 are spaced apart along the second direction Y, and the two sub-chambers 521 are respectively connected to one connecting pipe 512.

[0122] In some embodiments, such as Figures 5 to 7 As shown, multiple side beams 4 are connected end to end along a direction perpendicular to the first direction X to form a receiving space 2023. The heat exchange mechanism 51 includes a body 511 and a connecting pipe 512. The body 511 and the battery cell 3 are thermally connected. One end of the connecting pipe 512 is connected to the body 511, and the other end extends along the first direction X and is connected to the collector cavity 52.

[0123] In these embodiments, the heat exchange mechanism 51 includes a body 511 and a connecting pipe 512. One end of the connecting pipe 512 is connected to the body 511, and the other end extends along the first direction X and is connected to the collection cavity 52. ​​The body 511 and the collection cavity 52 have a larger operating space in the first direction X, which can reduce the difficulty of connecting the heat exchange mechanism 51 and the frame.

[0124] Optionally, multiple side beams 4 are connected end-to-end along a straight line parallel to the first direction X to form an accommodating space 2023. The parallelism and perpendicularity in this embodiment are not strictly geometric, but should conform to current industrial contexts and may allow for certain processing errors.

[0125] Optionally, the housing 202 also includes a base plate 2024, and the side beam 4 is connected to the base plate 2024. The first direction X can be the thickness direction of the base plate 2024.

[0126] The heat exchange mechanism 51 includes a body 511 and a connecting pipe 512. The contact area between the body 511 and the battery cell 3 is larger than the contact area between the connecting pipe 512 and the battery cell 3. In other words, the projected area of ​​the body 511 on the battery cell 3 is larger than the contact area of ​​the connecting pipe 512 on the battery cell 3, so as to facilitate heat exchange between the body 511 and the battery cell 3.

[0127] For example, the body 511 is plate-shaped, and the connecting pipe 512 is connected to the end of the plate-shaped body 511.

[0128] The connecting pipe 512 is a rigid component, and the exemplary connecting pipe 512 is a metal pipe, in order to improve the reliability of the heat exchange mechanism 51; the connecting pipe 512 is a flexible component, and the exemplary connecting pipe 512 is a flexible pipe, in order to facilitate the connection between the body 511 and the collection cavity 52.

[0129] The battery cells 3 are arranged in an array along the second direction Y and the third direction Z. The connecting pipes 512 are connected to both ends of the body 511 in the second direction Y. The connecting pipes 512 extend vertically along the first direction X, or the connecting pipes 512 extend along the first direction X and are inclined along the second direction Y or the third direction Z.

[0130] Optionally, the first end 5121 of the connecting pipe 512 is welded or threaded to the body 511; the second end 5122 of the connecting pipe 512 is welded or threaded to the side beam 4.

[0131] Optionally, the side beam 4 includes a first beam body 41 and a second beam body 42. The flow collection cavity 52 is disposed in the second beam body 42. One end of the connecting pipe 512 is connected to the main body 511, and the other end is connected to the flow collection cavity 52 through the second beam body 42.

[0132] In some embodiments, such as Figure 5 and Figure 6 As shown, the housing 202 includes a connector 2025, which is connected to and protrudes from the surface of the side beam 4. The connecting pipe 512 is connected to the connector 2025 to connect the collection cavity 52 and the main body 511.

[0133] In these embodiments, the connector 2025 is connected to and protrudes from the surface of the side beam 4. The connecting pipe 512 is connected to the connector 2025 to connect the collection cavity 52 and the body 511. The connector 2025 protruding from the surface of the side beam 4 does not occupy the space of the collection cavity 52, and reduces the assembly difficulty of the connector 2025 and the connecting pipe 512, making it convenient for the connector 2025 and the connecting pipe 512 to match.

[0134] The connector 2025 and the side beam 4 are integrally formed to improve the structural strength of the connector 2025 and the side beam 4; or the connector 2025 and the side beam 4 are welded or threaded separately to facilitate adjustment of the size of the connector 2025.

[0135] Optionally, the side beam 4 includes a first beam body 41 and a second beam body 42, the flow collection cavity 52 is disposed in the second beam body 42, and the connector 2025 is disposed in the second beam body 42 and communicates with the flow collection cavity 52.

[0136] Optionally, the connector 2025 is disposed on the side surface of the second beam 42 opposite to the bottom plate 2024 and extends along the first direction X to reduce the connection difficulty between the connector 2025 and the connecting pipe 512.

[0137] Optionally, connector 2025 can be made of metal to improve its service life.

[0138] Optionally, the connector 2025 and the connecting pipe 512 are threaded together to improve the connection reliability of the connector 2025 and the connecting pipe 512.

[0139] In some embodiments, such as Figure 5 and Figure 6 As shown, the heat exchange assembly 5 also includes a seal 53, which is disposed between the connecting pipe 512 and the connector 2025.

[0140] In these embodiments, a seal 53 is disposed between the connecting pipe 512 and the connector 2025 to improve the sealing performance between the connecting pipe 512 and the connector 2025 and reduce the risk of leakage of the heat exchange assembly 5.

[0141] For example, the connecting pipe 512 is sleeved on the outer peripheral surface of the connector 2025, and the sealing member 53 is disposed between the outer surface of the connector 2025 and the inner surface of the connecting pipe 512.

[0142] For example, the seal 53 is a sealing ring or sealing gel, etc.

[0143] In some embodiments, such as Figure 5 and Figure 6 As shown, the length of the connecting pipe 512 is adjustable, and / or the connecting pipe 512 is flexible.

[0144] In these embodiments, the length of the connecting pipe 512 is adjustable so that the heat exchange assembly 5 can be adapted to battery cells 3 of different sizes, thereby improving the compatibility of the heat exchange assembly 5; and / or the connecting pipe 512 is flexible to absorb the processing errors of the connecting pipe 512 and the side beam 4, thereby reducing the difficulty of connecting the heat exchange mechanism 51 and the collector cavity 52.

[0145] Optionally, the connecting pipe 512 is a corrugated pipe. For example, the connecting pipe 512 is a metal corrugated pipe to improve the service life of the heat exchange component 5; the connecting pipe 512 is a non-metallic corrugated pipe to facilitate bending of the connecting pipe 512.

[0146] For example, the length of the connecting pipe 512 in the first direction X is adjustable so that various battery cells 3 of different sizes in the first direction X can be accommodated by adjusting the length of the connecting pipe 512 in the first direction X.

[0147] Secondly, embodiments of this application provide an electrical device, including the battery device described in the first aspect embodiment.

[0148] In some embodiments, such as Figures 1 to 8 As shown, the battery device 2 includes a housing 202, battery cells 3, and a heat exchange assembly 5. The housing 202 includes side beams 4, which are connected end-to-end to form a receiving space 2023. The battery cells 3 are disposed within the receiving space 2023. The heat exchange assembly 5 includes a heat exchange mechanism 51 and a collector cavity 52. ​​The heat exchange mechanism 51 is disposed within the receiving space 2023 and is thermally connected to the battery cells 3. The side beams 4 include a first beam 41 and a second beam 42 connected to each other. The second beam 42 is disposed on the side of the first beam 41 facing the battery cells 3. The collector cavity 52 is disposed within the second beam 42 and is used to contain the heat exchange medium. The heat exchange mechanism 51 is connected to the collector cavity 52. ​​The housing 202 also includes a bottom plate 2024. The side beams 4 are connected to one side of the bottom plate 2024 in its thickness direction. The second beam 42 is disposed at the end of the first beam 41 near the bottom plate 2024. The heat exchange mechanism 51 includes the first beam 41 and the second beam 42. The heat exchange assembly 511 includes a body 511 and a connecting pipe 512. The body 511 and the battery cell 3 are thermally connected. The connecting pipe 512 includes a first end 5121 and a second end 5122 that are disposed opposite to each other. The first end 5121 is connected to the body 511, and the second end 5122 is connected to the collection cavity 52. ​​The second beam 42 is disposed between the first end 5121 and the bottom plate 2024. The connecting pipe 512 is connected to the collection cavity 52 through the side surface of the second beam 42 away from the bottom plate 2024. The housing 202 includes a connector 2025. The connector 2025 is connected to the side beam 4 and protrudes from the surface of the side beam 4. The connecting pipe 512 is connected to the connector 2025 to connect the collection cavity 52 and the body 511. The heat exchange assembly 5 also includes a seal 53. The seal 53 is disposed between the connecting pipe 512 and the connector 2025. The length of the connecting pipe 512 is adjustable, and / or the connecting pipe 512 is flexible.

[0149] In the embodiment of this application, the battery device 2 includes a housing 202, a battery cell 3, and a heat exchange assembly 5. The housing 202 includes side beams 4, and multiple side beams 4 are connected end to end to form a receiving space 2023. The heat exchange assembly 5 includes a heat exchange mechanism 51 and a collector cavity 52. ​​The heat exchange mechanism 51 and the battery cell 3 are disposed within the receiving space 2023. The heat exchange mechanism 51 and the battery cell 3 are thermally connected to regulate the temperature of the battery cell 3. The collector cavity 52 for containing the heat exchange medium is disposed within at least one side beam 4. The heat exchange mechanism 51 is connected to the collector cavity 52 so that the heat exchange medium can flow between the collector cavity 52 and the heat exchange mechanism 51. By integrating the collector cavity 52 into the side beam 4, there is no need to set up an independent collector pipe in the housing 202, which improves the risk of heat exchange medium leakage in the collector cavity 52. ​​Furthermore, by integrating the collector cavity 52 into the frame, the stability of the collector cavity 52 is improved, the risk of damage to the collector cavity 52 under external force is reduced, and the reliability of the battery device 2 is improved.

[0150] 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 in that, include: The box body includes side beams, and multiple side beams are connected end to end to form a receiving space; A single battery cell is disposed within the accommodating space; The heat exchange assembly includes a heat exchange mechanism and a collector cavity. The heat exchange mechanism is disposed within the receiving space and is thermally connected to the battery cell. The heat exchange chamber is disposed within at least one of the side beams, and the heat exchange chamber is used to contain the heat exchange medium. The heat exchange mechanism is connected to the heat exchange chamber.

2. The battery device according to claim 1, characterized in that, The side beam includes a first beam and a second beam that are connected to each other. The second beam is located on the side of the first beam facing the battery cell, and the current collector is located in the second beam.

3. The battery device according to claim 2, characterized in that, The box body also includes a bottom plate, the side beam is connected to one side of the bottom plate in its thickness direction, and the second beam is disposed at the end of the first beam near the bottom plate.

4. The battery device according to claim 3, characterized in that, The heat exchange mechanism includes a body and a connecting pipe. The body and the battery cell are thermally connected. The connecting pipe includes a first end and a second end that are arranged opposite to each other. The first end is connected to the body, and the second end is connected to the collection cavity. The second beam is disposed between the first end and the base plate.

5. The battery device according to claim 4, characterized in that, The connecting pipeline is connected to the flow collection cavity through the surface of the second beam away from the bottom plate.

6. The battery device according to claim 2, characterized in that, The collection chamber includes two sub-chambers, which are spaced apart within the second beam and connected to the same end of the heat exchange mechanism in its extension direction.

7. The battery device according to any one of claims 1-6, characterized in that, Multiple side beams are connected end to end along a direction perpendicular to the first direction to form the receiving space. The heat exchange mechanism includes a body and a connecting pipe. The body and the battery cell are thermally connected. One end of the connecting pipe is connected to the body, and the other end extends along the first direction and is connected to the collecting cavity.

8. The battery device according to claim 7, characterized in that, The housing includes a connector that is connected to and protrudes from the surface of the side beam, and the connecting pipe is connected to the connector to communicate the collection cavity and the main body.

9. The battery device according to claim 8, characterized in that, The heat exchange assembly also includes a seal, which is disposed between the connecting pipe and the connecting member.

10. The battery device according to claim 7, characterized in that, The length of the connecting pipe is adjustable, and / or the connecting pipe is flexible.

11. An electrical appliance, characterized in that, Includes the battery device described in any one of claims 1-10.

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