Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body, single batteries and a heat management assembly, the box body comprises wall plates and a containing cavity defined by the wall plates, the single batteries are arranged in the containing cavity, the heat management assembly comprises a heat exchange mechanism and a transmission mechanism, the heat exchange mechanism is in heat conduction connection with the single batteries in the first direction, and the heat exchange mechanism is used for adjusting the temperature of the single batteries; the transmission mechanism is arranged between at least one side of the battery monomer in the second direction and the wall plate, the heat exchange mechanism is communicated with the external environment through the transmission mechanism, so that the transmission mechanism can input or output a heat exchange medium to the heat exchange mechanism, and the heat exchange mechanism is connected with the transmission mechanism continuously extending in the first direction; the number of overall parts of the thermal management assembly is reduced, so that the structure of the thermal management assembly is simplified, the processing difficulty of the thermal management assembly is reduced, the number of overall connection interfaces is reduced, the liquid leakage risk of the thermal management assembly is reduced, and the reliability of the thermal management assembly and the battery device is improved.

Description

Technical Field

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

[0002] Battery devices are widely used in electronic devices such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and power tools, etc.

[0003] Battery devices typically include thermal management components to regulate the temperature of battery cells to enhance their performance. However, these components suffer from complex structures and low reliability, requiring urgent improvement. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can simplify the structure of the thermal management component and improve its reliability.

[0005] In a first aspect, the present application provides a battery device, comprising: a box body, comprising a wall panel and a accommodating cavity enclosed by the wall panel; a battery cell, arranged in the accommodating cavity; a thermal management component, comprising a heat exchange mechanism and a transmission mechanism connected to each other, the heat exchange mechanism being thermally conductively connected to the battery cell along a first direction, the transmission mechanism being arranged between at least one side of the battery cell in a second direction and the wall panel, and extending continuously in the first direction, the heat exchange mechanism being connected to the transmission mechanism, the transmission mechanism being used to input and / or output a heat exchange medium to the heat exchange mechanism, and the first direction and the second direction intersect.

[0006] In the solution of the embodiment of the present application, the battery device includes a box body, a battery cell and a thermal management component. The box body includes a wall panel and a accommodating cavity enclosed by the wall panel. The battery cell is arranged in the accommodating cavity. The box body plays a role of accommodating and protecting the battery cell. The thermal management component includes a heat exchange mechanism and a transmission mechanism. The heat exchange mechanism is thermally connected to the battery cell along a first direction. The heat exchange mechanism is used to adjust the temperature of the battery cell. The transmission mechanism is arranged between at least one side of the battery cell in its second direction and the wall panel. The heat exchange mechanism is connected to the external environment through the transmission mechanism so that the transmission mechanism can input or output heat exchange medium to the heat exchange mechanism. By connecting the heat exchange mechanism and the transmission mechanism extending continuously in the first direction, the number of overall parts of the thermal management component is reduced, thereby simplifying the structure of the thermal management component, reducing the processing difficulty of the thermal management component, reducing the number of its overall connection interfaces, reducing the risk of leakage of the thermal management component, and improving the reliability of the thermal management component and the battery device.

[0007] In some embodiments, the transmission mechanism is provided by integral injection molding.

[0008] In the solution of the embodiment of the present application, the transmission mechanism is provided by integral injection molding, which reduces the processing difficulty of the transmission mechanism, reduces the risk of leakage of the transmission mechanism, and improves the insulation capacity of the transmission mechanism and the battery cell.

[0009] In some embodiments, the transmission mechanism includes a chamber extending in a first direction and connecting the heat exchange mechanism and the external environment, and the cross-sectional area of ​​the chamber in the first direction remains unchanged.

[0010] In the solution of the embodiment of the present application, the cross-sectional area of ​​the chamber in the first direction remains unchanged, which helps to reduce the pressure drop of the heat exchange medium when it flows in the chamber and improve the heat exchange capacity of the heat exchange structure.

[0011] In some embodiments, the heat exchange mechanism includes a main body and a current collector, the main body is thermally connected to the battery cell along a first direction, the current collector is arranged at at least one end of the main body in its second direction, and the main body is connected to the transmission mechanism through the current collector, wherein the transmission mechanism and the current collector are integrally formed, or the transmission mechanism and the current collector are separately formed and connected to each other.

[0012] In the solution of the embodiment of the present application, the heat exchange mechanism includes a main body and a current collector, the main body and the battery cell are thermally connected, the current collector is connected between the main body and the transmission mechanism, and the transmission mechanism and the current collector are integrally formed, which helps to further reduce the number of overall parts of the thermal management component, so as to simplify the structure of the thermal management component, reduce the processing difficulty of the thermal management component, reduce the number of its overall connection interfaces, and reduce the risk of leakage of the thermal management component, or the transmission mechanism and the current collector are separately formed and set, which helps to reduce the processing difficulty of the transmission mechanism.

[0013] In some embodiments, the transmission mechanism and the current collector are formed separately and welded together.

[0014] In the solution of the embodiment of the present application, the transmission mechanism and the current collector are formed separately and welded together to improve the connection reliability of the transmission mechanism and the current collector and reduce the risk of leakage of the thermal management component.

[0015] In some embodiments, the transmission mechanism and the current collector are formed and arranged separately, the current collector includes a through hole, the hole wall of the through hole is provided with a first opening, the surface of the transmission mechanism is provided with a second opening, the current collector is sleeved on the transmission mechanism through the through hole, and the transmission mechanism and the current collector are connected through the first opening and the second opening.

[0016] In the solution of the embodiment of the present application, the current collector is sleeved on the transmission mechanism through the through hole, which helps to increase the contact area between the two and improve the connection reliability of the current collector and the transmission mechanism.

[0017] In some embodiments, the thermal management component also includes a limiting protrusion and a limiting groove, the transmission mechanism and the current collector are formed separately, the outer surface of the current collector is provided with one of the limiting protrusion or the limiting groove, and the outer surface of the transmission mechanism is provided with the other of the limiting protrusion or the limiting groove, and at least part of the limiting protrusion is accommodated in the limiting groove.

[0018] In the solution of the embodiment of the present application, by cooperating with the limiting protrusions and limiting grooves respectively provided on the transmission mechanism and the current collector, the problem of relative deflection that is prone to occur during the assembly of the transmission mechanism and the current collector is improved, which helps to reduce the difficulty of assembling the transmission mechanism and the current collector.

[0019] In some embodiments, the box body further includes a positioning groove, which is provided on the inner surface of the wall panel and extends along a third direction, at least part of the thermal management component is accommodated in the positioning groove, and the first direction, the second direction and the third direction intersect with each other.

[0020] In the solution of the embodiment of the present application, the wall panel of the box is provided with a positioning groove extending in a third direction, and at least part of the thermal management component is accommodated in the positioning groove. The positioning groove is used to locate the relative position of the thermal management component and the box, thereby reducing the difficulty of assembling the thermal management component and the box; and the positioning groove can also improve the stability of the thermal management component in the box.

[0021] In some embodiments, the heat exchange mechanism includes a main body and a current collector, the main body is arranged along the first direction and spaced apart from the battery cell, the current collector is arranged at at least one end of the main body in its second direction, the main body is connected to the transmission mechanism through the current collector, the current collector includes a base and a positioning portion, the base is connected to the transmission mechanism, the positioning portion is arranged at one end of the base in the third direction close to the bottom of the accommodating cavity, and at least part of the positioning portion extends away from the base along the second direction into the positioning groove.

[0022] In the embodiment of the present application, the current collector includes a base and a positioning portion, the base is connected to the transmission mechanism, the positioning portion extends from one end of the base in the third direction close to the bottom of the accommodating cavity, and at least part of the positioning portion extends away from the base in the second direction into the positioning groove. The positioning portion can cooperate with the positioning groove to locate the relative position of the thermal management component and the box body, and can also reduce the overall size of the current collector, reduce the cost of the current collector material, and enhance the contact area between the current collector and the buffer structure in the accommodating cavity, thereby reducing the difficulty of assembling the thermal management component and the box body.

[0023] In some embodiments, the battery device further includes a heat-conducting layer, which is disposed between the battery cells and the heat exchange mechanism.

[0024] In the solution of the embodiment of the present application, a heat conductive layer is provided between the battery cell and the heat exchange mechanism to improve the heat exchange efficiency between the heat exchange mechanism and the battery cell, improve the regulation capability of the thermal management component on the battery cell, and improve the performance of the battery device.

[0025] In a second aspect, an embodiment of the present application provides an electrical device, comprising the battery device of any embodiment of the first aspect described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0027] Figure 1 is a structural schematic diagram of a vehicle provided in one embodiment of the present application;

[0028] Figure 2 is a structural diagram of a battery device provided in one embodiment of the present application;

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

[0030] Figure 4 is an exploded view of a battery cell provided in one embodiment of the present application;

[0031] Figure 5 is a structural diagram of a battery device provided in one embodiment of the present application;

[0032] Figure 6 is an exploded view of a battery device provided in one embodiment of the present application;

[0033] Figure 7 is a schematic structural diagram of a thermal management assembly of a battery device provided in one embodiment of the present application;

[0034] Figure 8 This is a partial structural diagram of a thermal management component of a battery device provided in one embodiment of the present application;

[0035] Figure 9 is an exploded view of a thermal management component of a battery device provided in one embodiment of the present application;

[0036] Figure 10 is an exploded view of a thermal management assembly of a battery device provided in another embodiment of the present application;

[0037] Figure 11 is a schematic structural diagram of a thermal management assembly of a battery device provided in one embodiment of the present application;

[0038] Figure 12 yes Figure 11 Schematic diagram of the enlarged structure at A in the middle;

[0039] Figure 13 This is a partial structural diagram of an exploded view of a battery device provided in one embodiment of the present application;

[0040] Figure 14 It is a partial structural diagram of a battery device provided in one embodiment of the present application.

[0041] Reference numerals:

[0042] 1. Vehicle; 101. Motor; 102. Controller; 2. Battery device; 201. Battery module; 202. Housing; 2021. First housing; 2022. Second housing; 2023. Wall panel; 2024. Accommodation chamber;

[0043] 3. Battery cell; 31. Housing; 32. Electrode assembly; 33. Electrode terminal;

[0044] 4. Thermal management components;

[0045] 5. Heat exchange mechanism; 51. Body; 52. Current collector; 521. Through hole; 522. First opening; 523. Base; 524. Positioning portion;

[0046] 6. Transmission mechanism; 61. Chamber; 62. Second opening;

[0047] 71. Limiting protrusion; 72. Limiting groove;

[0048] 81. Positioning groove; 82. Heat conducting layer;

[0049] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0051] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0053] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0054] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0055] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0056] Currently, market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0057] A thermal management component is typically installed inside a battery device to regulate the temperature of the battery cells to enhance their performance. However, the thermal management component has issues with complex structure and low reliability.

[0058] The reason for the above problem is that adjacent cold plates (heat exchange mechanisms) need to be connected to each other through matching independent pipelines or interface parts, that is, several independent pipelines or interface parts arranged at intervals are correspondingly connected to the collectors of the cold plates to form a total transmission path (transmission mechanism). This results in a large number of overall parts of the thermal management component, a cumbersome assembly process, many connection interfaces of the thermal management component, and a high risk of leakage.

[0059] Based on the above problems, an embodiment of the present application provides a battery device, which includes a box body, a battery cell and a thermal management component. The box body includes a wall panel and a accommodating cavity enclosed by the wall panel. The battery cell is arranged in the accommodating cavity. The box body plays a role of accommodating and protecting the battery cell. The thermal management component includes a heat exchange mechanism and a transmission mechanism. The heat exchange mechanism is thermally connected to the battery cell along a first direction. The heat exchange mechanism is used to adjust the temperature of the battery cell. The transmission mechanism is arranged between at least one side of the battery cell in its second direction and the wall panel. The heat exchange mechanism is connected to the external environment through the transmission mechanism so that the transmission mechanism can input or output heat exchange medium to the heat exchange mechanism. By connecting the heat exchange mechanism and the transmission mechanism extending continuously in the first direction, the number of overall parts of the thermal management component is reduced, so as to simplify the structure of the thermal management component, reduce the processing difficulty of the thermal management component, reduce the number of its overall connection interfaces, reduce the risk of leakage of the thermal management component, and improve the reliability of the thermal management component and the battery device.

[0060] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using the battery devices.

[0061] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0062] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0063] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the present invention does not limit this. The battery cells may be cylindrical, flat, rectangular, or other shapes, and the present invention does not limit this.

[0064] The battery device referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery device referred to in this application may include a battery module or battery pack. A battery pack generally includes a casing for enclosing one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0065] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer, with the positive active material layer coated on the surface of the positive current collector. The positive current collector includes a positive current collector portion and a positive electrode tab connected to the positive current collector portion. The positive current collector portion is coated with the positive active material layer, while the positive electrode tab is not coated with the positive active material layer. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer, with the negative active material layer coated on the surface of the current collector. The negative current collector comprises a negative current collecting portion and a negative tab connected to the negative current collecting portion. The negative current collecting portion is coated with the negative active material layer, while the negative tab is not. The negative current collector can be made of copper, and the negative active material layer includes a negative active material, such as carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene).

[0066] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including a box and electrical equipment using the battery devices. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0067] Please refer to Figure 1 , Figure 1A schematic structural diagram of a vehicle 1 provided for some embodiments of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 2 is provided inside the vehicle 1, and the battery device 2 may be provided at the bottom, head or tail of the vehicle 1. The battery device 2 may be used to power the vehicle 1, for example, the battery device 2 may serve as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 102 and a motor 101, and the controller 102 is used to control the battery to power the motor 101, for example, for starting, navigating and operating power requirements of the vehicle 1 during driving.

[0068] In some embodiments of the present application, the battery device 2 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0069] Figure 2 FIG2 shows a schematic structural diagram of a battery device 2 according to an embodiment of the present application.

[0070] The battery device 2 mentioned in the embodiment of the present application may include one or more battery cell 3 assemblies for providing voltage and capacity. The battery cell 3 assembly may include multiple battery cells 3, and the multiple battery cells 3 are connected in series, parallel or mixed via a busbar.

[0071] In some embodiments, a battery cell 3 assembly is generally formed by arranging a plurality of battery cells 3 .

[0072] As an example, the battery cell 3 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 bundling multiple battery cells 3 with a cable tie.

[0073] In some embodiments, the battery device 2 may be a battery pack, which includes a housing 202 and one or more battery cell 3 assemblies, wherein the battery cell 3 assemblies are housed in the housing 202 .

[0074] As an example, the battery cell 3 assembly may be a battery module 201 , and the battery cell 3 assembly may be accommodated in the box 202 by fixing the battery module 201 in the box 202 .

[0075] As an example, the battery cell 3 assembly may also be accommodated in the box body 202 by directly fixing the plurality of battery cells 3 to the box body 202 .

[0076] 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 engage to form a closed space within the housing 202 for accommodating the battery cells 3. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing 2021 may be an end cap or a bottom plate.

[0077] As an example, the box body 202 may include end covers, a frame, and a bottom plate. The end covers and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 202 to accommodate the battery cell 3 assembly.

[0078] In some embodiments, the box 202 may serve as part of the chassis structure of the vehicle 1. For example, a portion of the box 202 may become at least a portion of the floor of the vehicle 1, or a portion of the box 202 may become at least a portion of the cross member and longitudinal member of the vehicle 1.

[0079] Figure 3 A schematic structural diagram of a battery module 201 according to an embodiment of the present application is shown.

[0080] In some embodiments, as Figure 2 and Figure 3 As shown, there are multiple battery cells 3, which are first connected in series, in parallel, or in series to form a battery module 201. The multiple battery modules 201 are then connected in series, in parallel, or in series to form a whole, and are accommodated in a box 202.

[0081] The multiple battery cells 3 in the battery module 201 can be electrically connected via a busbar component to achieve parallel connection, series connection, or mixed connection of the multiple battery cells 3 in the battery module 201 .

[0082] Figure 4 FIG. 1 is an exploded view of a battery cell 3 provided in one embodiment of the present application. The battery cell 3 refers to the smallest unit constituting the battery device 2. Figure 4 The battery cell 3 includes an end cover assembly, a shell 31 and an electrode assembly 32 .

[0083] The electrode assembly 32 is a component in the battery cell 3 where electrochemical reactions occur. One or more electrode assemblies 32 may be contained in the shell 31. The electrode assembly 32 is mainly formed by winding or stacking electrode sheets, which are divided into positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets. The parts of the positive electrode sheets and the negative electrode sheets with active materials constitute the electrode body, and the parts of the positive electrode sheets and the negative electrode sheets without active materials each constitute the electrode ear. The positive electrode ear and the negative electrode ear may be located together at one end of the electrode body or respectively at both ends of the electrode body. During the charge and discharge process of the battery cell 3, the positive electrode active material and the negative electrode active material react with the electrolyte, and the ear is connected to the electrode terminal 33 to form a current loop.

[0084] The electrode assembly 32 may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0085] In some embodiments, the electrode assembly 32 is a wound structure in which the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0086] In some embodiments, the electrode assembly 32 has a laminated structure. For example, multiple positive and negative electrode sheets may be provided, and the multiple positive and negative electrode sheets may be alternately stacked. Multiple separators may be provided, and each separator may be provided between any adjacent positive or negative electrode sheets. Alternatively, the separator may be provided continuously and folded between any adjacent positive or negative electrode sheets.

[0087] In some embodiments, the shape of the electrode assembly 32 can be cylindrical, flat, or polygonal.

[0088] In some embodiments, the electrode assembly 32 is provided with tabs that can conduct current from the electrode assembly 32. The tabs include a positive tab and a negative tab.

[0089] The battery cell 3 may include a housing 31. The housing 31 is a component that cooperates with the end cap assembly to form an internal environment for the battery cell 3. This internal environment can accommodate the electrode assembly 32, the electrolyte (not shown), and other components. The housing 31 may be made of steel, aluminum, plastic (such as polypropylene), a composite metal shell (such as a copper-aluminum composite housing 31), or an aluminum-plastic film. In some embodiments, the housing 31 may be sealed or non-sealed. For example, when the housing 31 is non-sealed, it protects the electrode assembly 32. A sealing bag is provided between the housing 31 and the electrode assembly 32 to encapsulate the electrode assembly 32 and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating material or an aluminum-plastic film. When the housing 31 is sealed, it encapsulates the electrode assembly 32, the electrolyte, and other components.

[0090] As an example, the battery cell 3 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery cell. The polygonal battery cell is, for example, a hexagonal battery cell, etc. There is no special limitation in this application.

[0091] The housing 31 and the end cap assembly can be separate components. One or more openings can be provided on the housing 31, and one or more end cap assemblies cover the openings to form the internal environment of the battery cell 3. Alternatively, the end cap assembly and the housing 31 can be integrated. Optionally, the end cap assembly and the housing 31 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 31 needs to be enclosed, the end cap assembly can be used to cover the housing 31.

[0092] In some embodiments, the electrode terminal 33 can be provided on the end cap assembly or on the housing 31, and the electrode terminal 33 is electrically connected to the tab. The electrode terminal 33 can be directly connected to the tab or indirectly connected to the tab via a switching mechanism.

[0093] See also Figure 5 、 Figure 6 and Figure 7 , Figure 5 is a structural diagram of a battery device provided in one embodiment of the present application; Figure 6 is an exploded view of a battery device provided in one embodiment of the present application; Figure 7 Schematic diagram of the structure of a thermal management component of a battery device provided in one embodiment of the present application.

[0094] First, as Figures 5 to 7 As shown, the present application provides a battery device 2, which includes a housing 202, a battery cell 3 and a thermal management component 4. The housing 202 includes a wall panel 2023 and a receiving cavity 2024 enclosed by the wall panel 2023; the battery cell 3 is disposed in the receiving cavity 2024; the thermal management component 4 includes a heat exchange mechanism 5 and a transmission mechanism 6 that are interconnected. The heat exchange mechanism 5 is thermally connected to the battery cell 3 along a first direction X. The transmission mechanism 6 is disposed between at least one side of the battery cell 3 in a second direction Y and the wall panel 2023, and extends continuously in the first direction X. The heat exchange mechanism 5 is connected to the transmission mechanism 6. The transmission mechanism 6 is used to input and / or output a heat exchange medium to the heat exchange mechanism 5. The first direction X and the second direction Y intersect.

[0095] In the embodiment of the present application, the battery device 2 includes a box body 202, a battery cell 3 and a thermal management component 4. The box body 202 includes a wall plate 2023 and a receiving cavity 2024 surrounded by the wall plate 2023. The battery cell 3 is arranged in the receiving cavity 2024. The box body 202 plays a role in accommodating and protecting the battery cell 3. The thermal management component 4 includes a heat exchange mechanism 5 and a transmission mechanism 6. The heat exchange mechanism 5 is thermally connected to the battery cell 3 along the first direction X. The heat exchange mechanism 5 is used to adjust the temperature of the battery cell 3. The transmission mechanism 6 is arranged on the battery cell 3. Between at least one side of the second direction Y and the wall panel 2023, the heat exchange mechanism 5 is connected to the external environment through the transmission mechanism 6, so that the transmission mechanism 6 can input or output heat exchange medium to the heat exchange mechanism 5. By connecting the heat exchange mechanism 5 and the transmission mechanism 6 that extends continuously in the first direction X, the number of overall parts of the thermal management component 4 is reduced, thereby simplifying the structure of the thermal management component 4, reducing the processing difficulty of the thermal management component 4, reducing the number of its overall connection interfaces, reducing the risk of leakage of the thermal management component 4, and improving the reliability of the thermal management component 4 and the battery device 2.

[0096] Optionally, a plurality of battery cells 3 are disposed in the box body 202 to increase the capacity of the battery device 2 .

[0097] Exemplarily, the plurality of battery cells 3 are arranged in an array along the first direction X and the second direction Y.

[0098] For example, the first direction X is one of the length and the width of the box body 202 , and the second direction Y is the other of the length and the width of the box body 202 .

[0099] The heat exchange mechanism 5 and the battery cell 3 are thermally connected, which means that the heat exchange mechanism 5 and the battery cell 3 are directly connected, or the heat exchange mechanism 5 and the battery cell 3 are connected through a heat conducting medium, which can be a heat conducting colloid or metal.

[0100] The heat exchange mechanism 5 is provided with a plurality of flow channels for accommodating a heat exchange medium. The heat exchange medium flows through the flow channels to regulate the heat of the battery cell 3. For example, the heat exchange medium may be water, ethanol, ethylene glycol, or the like.

[0101] For example, the heat exchange mechanism 5 may be made of metal or a heat-conducting composite material.

[0102] Optionally, the battery cell 3 is in a cubic shape, and the large surfaces of the battery cell 3 are arranged on both sides thereof in the first direction X. The large surface refers to the single surface with the largest area of ​​the battery cell 3. The heat exchange mechanism 5 contacts the large surface to enhance the heat conduction rate of the heat exchange mechanism 5.

[0103] Optionally, the transmission mechanism 6 is disposed on one side of the battery cell 3 in the first direction X, or the transmission mechanism 6 is disposed on both sides of the battery cell 3 in the first direction X.

[0104] Optionally, multiple battery cells 3 are spaced apart along a first direction X, and the thermal management assembly 4 includes multiple heat exchange mechanisms 5. The multiple heat exchange mechanisms 5 are spaced apart along the first direction X, and a heat exchange medium is input or output to or from the multiple heat exchange mechanisms 5 via a transmission mechanism 6. Exemplarily, the thermal management assembly 4 includes two, three, five, ten, or other heat exchange mechanisms 5.

[0105] Optionally, the thermal management component 4 includes two transmission mechanisms 6, one transmission mechanism 6 is used to input heat exchange medium from the outside to the heat exchange mechanism 5, and the other transmission mechanism 6 is used to input heat exchange medium from the heat exchange mechanism 5 to the outside.

[0106] Optionally, the two transmission mechanisms 6 are respectively arranged on both sides of the heat exchange mechanism 5 in the second direction Y; or the two transmission mechanisms 6 are arranged on one side of the heat exchange mechanism 5 in the second direction Y.

[0107] Optionally, the transmission mechanism 6 extends continuously in the first direction X, meaning that the transmission mechanism 6 is an integral structure that continuously connects or passes through multiple heat exchange mechanisms 5 in the first direction X. The transmission mechanism 6 can be integrally formed or formed by directly connecting multiple substructures. The transmission mechanism 6 is not composed of multiple interface components spaced apart between adjacent heat exchange mechanisms 5.

[0108] Exemplarily, the transmission mechanism 6 is a tubular member connected to or passing through the plurality of heat exchange mechanisms 5 .

[0109] Exemplarily, the transmission mechanism 6 is formed by integral injection molding, machining, or integral casting, etc.; or the transmission mechanism 6 is formed by splicing, bonding or welding a plurality of substructures.

[0110] A transmission mechanism 6 can simultaneously connect at least two heat exchange mechanisms 5 without setting separate interface parts between adjacent heat exchange mechanisms 5, so as to reduce the number of parts and the number of connection interfaces of the overall thermal management component 4. Moreover, as the number of parts decreases, its storage cost will also decrease accordingly.

[0111] Exemplarily, the heat exchange mechanisms 5 of the thermal management assembly 4 arranged in the first direction X are all connected by a common transmission mechanism 6 .

[0112] For example, during the assembly of the thermal management component 4 , each heat exchange mechanism 5 only needs to be connected to the transmission mechanism 6 , without the need to connect two adjacent heat exchange mechanisms 5 separately through interface parts, which helps to simplify the assembly process of the thermal management component 4 .

[0113] Optionally, the transmission mechanism 6 is independent of the box body 202 to facilitate replacement and maintenance of the transmission mechanism 6 .

[0114] Exemplarily, the material of the transmission mechanism 6 is metal or composite material.

[0115] Exemplarily, the transmission mechanism 6 runs through the entire accommodating cavity 2024 in the first direction X.

[0116] In some embodiments, as Figures 5 to 7 As shown, the transmission mechanism 6 is provided by integral injection molding.

[0117] In these embodiments, the transmission mechanism 6 is provided by integral injection molding, which reduces the processing difficulty of the transmission mechanism 6 , reduces the risk of leakage of the transmission mechanism 6 , and improves the insulation capacity of the transmission mechanism 6 and the battery cell 3 .

[0118] Optionally, the transmission mechanism 6 is injection molded from a polymer composite material to ensure that the transmission mechanism 6 is both lightweight and heat-resistant. For example, the transmission mechanism 6 is injection molded from a composite material of PPS (Polyphenylene sulfide) and glass fiber.

[0119] Optionally, the heat exchange mechanism 5 is made of an alloy with excellent thermal conductivity or a high thermal conductivity composite material to enhance the heat exchange rate of the heat exchange mechanism 5. Exemplarily, the heat exchange mechanism 5 is made of aluminum alloy.

[0120] See also Figure 8 , Figure 8 1 is a partial structural diagram of a thermal management component of a battery device provided in one embodiment of the present application.

[0121] In some embodiments, as Figure 7 and Figure 8 As shown, the transmission mechanism 6 includes a chamber 61 , which extends in a first direction X and connects the heat exchange mechanism 5 with the external environment. The cross-sectional area of ​​the chamber 61 in the first direction X remains unchanged.

[0122] In these embodiments, the cross-sectional area of ​​the chamber 61 in the first direction X remains unchanged, which helps to reduce the pressure drop of the heat exchange medium when it flows in the chamber 61 and improve the heat exchange capacity of the heat exchange structure.

[0123] Optionally, a chamber 61 extending in the first direction X and for the heat exchange medium to flow is provided inside the transmission mechanism 6. The transmission mechanism 6 is provided with an opening at one end in the first direction X, which connects the chamber 61 and the external environment. The opening can be used to set an external joint to connect to the outside world.

[0124] Exemplarily, the external connector is a quick-connect connector.

[0125] Optionally, the specific shape and size of the transmission mechanism 6 can be designed independently. For example, the transmission mechanism 6 is cylindrical or cubical in shape extending in the first direction X.

[0126] Optionally, the specific shape and size of the chamber 61 can be designed independently. For example, the chamber 61 is a cylindrical chamber or a cubic chamber extending in the first direction X.

[0127] Optionally, the surface of the chamber 61 is a smooth surface to reduce the flow resistance of the heat exchange medium in the chamber 61, reduce the pressure drop of the heat exchange medium, and thereby increase the flow rate of the heat exchange medium in the chamber 61, thereby improving the heat exchange efficiency and heat exchange effect of the thermal management component 4 on the battery cell 3.

[0128] Optionally, the cross-sectional shape and area of ​​the chamber 61 in the first direction X remain unchanged, so as to reduce the pressure drop of the heat exchange medium in the chamber 61 and increase the flow rate of the heat exchange medium in the chamber 61 .

[0129] See also Figure 9 and Figure 10 , Figure 9 is an exploded view of a thermal management component of a battery device provided in one embodiment of the present application; Figure 10 FIG. 4 is an exploded view of a thermal management component of a battery device provided in another embodiment of the present application.

[0130] In some embodiments, as Figure 5 、 Figure 6 as well as Figure 9 and Figure 10 As shown, the heat exchange mechanism 5 includes a main body 51 and a current collector 52. The main body 51 is thermally connected to the battery cell 3 along the first direction X. The current collector 52 is arranged at at least one end of the main body 51 in the second direction Y. The main body 51 is connected to the transmission mechanism 6 through the current collector 52, wherein the transmission mechanism 6 and the current collector 52 are integrally formed, or the transmission mechanism 6 and the current collector 52 are separately formed and connected to each other.

[0131] In these embodiments, the heat exchange mechanism 5 includes a main body 51 and a current collector 52, the main body 51 and the battery cell 3 are thermally connected, the current collector 52 is connected between the main body 51 and the transmission mechanism 6, and the transmission mechanism 6 and the current collector 52 are integrally formed, which helps to further reduce the number of overall parts of the thermal management component 4, so as to simplify the structure of the thermal management component 4, reduce the processing difficulty of the thermal management component 4, reduce the number of its overall connection interfaces, and reduce the risk of leakage of the thermal management component 4, or the transmission mechanism 6 and the current collector 52 are separately formed and arranged, which helps to reduce the processing difficulty of the transmission mechanism 6.

[0132] Specifically, the heat exchange mechanism 5 includes a main body 51 and a fluid collector 52 that are connected to each other. The fluid collector 52 includes a manifold. The flow channel of the main body 51 is connected to the manifold, and the manifold is connected to the chamber 61 of the transmission mechanism 6.

[0133] Optionally, the current collector 52 and the body 51 are connected by snapping or welding.

[0134] The transmission mechanism 6 and the current collector 52 are integrally formed, and no additional connection structure is required between the two, so as to reduce the difficulty of matching the transmission mechanism 6 and the current collector 52, improve the connection reliability between the two, and reduce the risk of leakage of the transmission mechanism 6.

[0135] Optionally, the transmission mechanism 6 and the current collector 52 are integrally injection-molded to improve the insulation performance of the thermal management component 4 .

[0136] The transmission mechanism 6 and the current collector 52 are formed and arranged separately and connected to each other, which means that the transmission mechanism 6 and the current collector 52 are independently prepared and connected to each other.

[0137] For example, the transmission mechanism 6 and the current collector 52 may be connected by welding, bonding, clamping or riveting.

[0138] Exemplarily, the transmission mechanism 6 is provided with a plurality of openings spaced apart along the first direction X, and the current collector 52 is provided with corresponding openings connected to the current collecting cavity, so that when the current collector 52 and the transmission mechanism 6 are connected at the target position, the current collector 52 and the transmission mechanism 6 can be connected through the openings provided therein.

[0139] For example, during the assembly process of the transmission mechanism 6 and the current collector 52 , the relative positions of the current collectors 52 and the transmission mechanism 6 can be fixed by a number of positioning fixtures, and the specific positioning fixture structure can be designed by oneself.

[0140] In some embodiments, as Figure 5 and Figure 10 As shown, the transmission mechanism 6 and the current collector 52 are formed separately and welded together.

[0141] In these embodiments, the transmission mechanism 6 and the current collector 52 are formed separately and welded together to improve the connection reliability between the transmission mechanism 6 and the current collector 52 and reduce the risk of leakage of the thermal management component 4.

[0142] Exemplarily, the transmission mechanism 6 and the current collector 52 are connected by laser welding or brazing to form a sealed interface.

[0143] In some embodiments, as Figure 7 、 Figure 8 and Figure 10 As shown, the transmission mechanism 6 and the current collector 52 are formed and arranged separately, the current collector 52 includes a through hole 521, the hole wall of the through hole 521 is provided with a first opening 522, and the surface of the transmission mechanism 6 is provided with a second opening 62. The current collector 52 is sleeved on the transmission mechanism 6 through the through hole 521, and the transmission mechanism 6 and the current collector 52 are connected through the first opening 522 and the second opening 62.

[0144] In these embodiments, the current collector 52 is sleeved on the transmission mechanism 6 through the through hole 521 , which helps to increase the contact area between the two and improve the connection reliability of the current collector 52 and the transmission mechanism 6 .

[0145] Optionally, the current collector 52 includes a first end and a second end oppositely arranged along the second direction Y, the first end of the current collector 52 is connected to the body 51, the through hole 521 is arranged at the second end, and the through hole 521 passes through the current collector 52 along the first direction X.

[0146] Optionally, the shape and size of through-hole 521 matches that of transmission mechanism 6 to facilitate a sealed connection between the two. For example, if transmission mechanism 6 is cylindrical, through-hole 521 is a circular hole to alleviate stress concentration issues in the current collector 52 and transmission mechanism 6. Alternatively, if transmission mechanism 6 is cubical, through-hole 521 is a polygonal hole to alleviate relative deflection between transmission mechanism 6 and current collector 52 during assembly.

[0147] A second opening 62 is provided on the surface of the transmission mechanism 6, and the second opening 62 is connected to the chamber 61 of the transmission mechanism 6; the collector 52 is provided with a first opening 522, and the first opening 522 is connected to the collecting cavity of the collector 52. When the transmission mechanism 6 and the collector 52 are connected at the target position, the first opening 522 and at least part of the second opening 62 overlap to connect the collecting cavity and the chamber 61, thereby further connecting the main body 51 to the transmission mechanism 6 through the collector 52.

[0148] Optionally, the specific shapes and sizes of the first opening 522 and the second opening 62 can be designed by oneself. For example, the first opening 522 and the second opening 62 are both rectangular and have the same size.

[0149] See also Figure 11 and Figure 12 , Figure 11 is a schematic structural diagram of a thermal management assembly of a battery device provided in one embodiment of the present application; Figure 12 yes Figure 11 Schematic diagram of the enlarged structure at point A in the middle.

[0150] In some embodiments, as Figures 10 to 12 As shown, the thermal management component also includes a limiting protrusion 71 and a limiting groove 72. The transmission mechanism 6 and the current collector 52 are formed separately. The outer surface of the current collector 52 is provided with one of the limiting protrusion 71 or the limiting groove 72, and the outer surface of the transmission mechanism 6 is provided with the other of the limiting protrusion 71 or the limiting groove 72. At least part of the limiting protrusion 71 is accommodated in the limiting groove 72.

[0151] In these embodiments, by cooperating with the limiting protrusions 71 and the limiting grooves 72 respectively provided on the transmission mechanism 6 and the current collector 52, the problem of relative deflection that is prone to occur during the assembly of the transmission mechanism 6 and the current collector 52 is improved, which helps to reduce the difficulty of assembling the transmission mechanism 6 and the current collector 52.

[0152] Specifically, a limiting protrusion 71 is provided on the outer surface of the current collector 52, and a limiting groove 72 is provided on the outer surface of the transmission mechanism 6; or a limiting groove 72 is provided on the outer surface of the current collector 52, and a limiting protrusion 71 is provided on the outer surface of the transmission mechanism 6. When the transmission mechanism 6 and the current collector 52 are connected, at least part of the limiting protrusion 71 is accommodated in the limiting groove 72.

[0153] Optionally, one of the limiting protrusion 71 or the limiting groove 72 is integrally formed with the current collector 52 , and the other of the limiting protrusion 71 or the limiting groove 72 is integrally formed with the transmission mechanism 6 .

[0154] Optionally, the outer surface of the transmission mechanism 6 is provided with a limiting protrusion 71 or a limiting groove 72 extending continuously along the first direction X to guide the current collector 52 to be sleeved on the transmission mechanism 6 .

[0155] Optionally, the outer surface of the transmission mechanism 6 is provided with a plurality of limiting protrusions 71 or limiting grooves 72 spaced apart along the first direction X to position the current collector 52 at the target position. When the current collector 52 is at the target position, the first opening 522 is connected to the second opening 62 .

[0156] See also Figure 13 , Figure 13 It is a partial structural diagram of an exploded view of a battery device provided in one embodiment of the present application.

[0157] In some embodiments, as Figure 5 、 Figure 6 and Figure 13 As shown, the box body 202 also includes a positioning groove 81, which is arranged on the inner surface of the wall plate 2023 and extends along the third direction Z. At least part of the thermal management component 4 is accommodated in the positioning groove 81, and the first direction X, the second direction Y and the third direction Z intersect with each other.

[0158] In these embodiments, the wall panel 2023 of the box body 202 is provided with a positioning groove 81 extending in the third direction Z, and at least a portion of the thermal management component 4 is accommodated in the positioning groove 81. The positioning groove 81 is used to locate the relative position of the thermal management component 4 and the box body 202, thereby reducing the difficulty of assembling the thermal management component 4 and the box body 202; and the positioning groove 81 can also improve the stability of the thermal management component 4 in the box body 202.

[0159] Optionally, during the assembly of the battery device 2 in the embodiment of the present application, the thermal management component 4 is integrated outside the box 202 to form a complete heat exchange circuit, eliminating the need to connect cold plates and interface parts one by one inside the box 202, which helps reduce the difficulty of assembling the thermal management component 4; the thermal management component 4 is then installed in the accommodating cavity 2024 along the positioning groove 81; finally, the thermal management component 4 is connected to the external cooling system.

[0160] The inner surface of the wall plate 2023 refers to the side surface of the wall plate 2023 facing the accommodating cavity 2024 .

[0161] Optionally, a plurality of positioning grooves 81 are arranged on the wall plate 2023 at intervals along the first direction.

[0162] Exemplarily, a plurality of positioning grooves 81 are arranged on the wall plate 2023 at intervals along the first direction X, and each positioning groove 81 is arranged in a one-to-one correspondence with each current collector 52. The current collector 52 can be accommodated in the positioning groove 81. The positioning groove 81 is used to limit the position of the thermal management component 4 relative to the box body 202 in the first direction X and the second direction Y.

[0163] Optionally, the shape and size of the positioning groove 81 can be designed by oneself. Exemplarily, the positioning groove 81 is a rectangular groove.

[0164] Optionally, the positioning groove 81 and the thermal management component 4 are snap-connected to improve the stability of the thermal management component 4 in the box 202 .

[0165] Optionally, a buffer material is provided in the box body 202 , and the thermal management component 4 is pressed against the buffer material during the process of being put into the box, thereby reducing the risk of the thermal management component 4 being damaged by collision.

[0166] In some embodiments, as Figure 5 、 Figure 6 and Figure 13 As shown, the heat exchange mechanism 5 includes a main body 51 and a current collector 52. The main body 51 is arranged to be spaced apart from the battery cell 3 along the first direction X. The current collector 52 is arranged at at least one end of the main body 51 in the second direction Y. The main body 51 is connected to the transmission mechanism 6 through the current collector 52. The current collector 52 includes a base 523 and a positioning portion 524. The base 523 is connected to the transmission mechanism 6. The positioning portion 524 is arranged at one end of the base 523 in the third direction Z close to the bottom of the accommodating cavity 2024. At least part of the positioning portion 524 extends away from the base 523 along the second direction Y to the positioning groove 81.

[0167] In these embodiments, the current collector 52 includes a base 523 and a positioning portion 524. The base 523 is connected to the transmission mechanism 6. The positioning portion 524 extends from one end of the base 523 in the third direction Z close to the bottom of the accommodating cavity 2024. At least part of the positioning portion 524 extends away from the base 523 along the second direction Y to the positioning groove 81. The positioning portion 524 can cooperate with the positioning groove 81 to position the relative position of the thermal management component 4 and the box body 202, and can also reduce the overall size of the current collector 52, reduce the material cost of the current collector 52, and enhance the contact area between the current collector 52 and the buffer structure in the accommodating cavity 2024, thereby reducing the difficulty of assembling the thermal management component 4 and the box body 202.

[0168] Specifically, the current collector 52 includes a base 523 and a positioning portion 524 , and the body 51 is connected to the transmission mechanism 6 through the base 523 .

[0169] Optionally, the base 523 and the positioning portion 524 are integrally formed to enhance the overall structural strength of the current collector 52 .

[0170] Exemplarily, a cushioning material is provided at the bottom of the accommodating cavity 2024 , and when the thermal management component 4 is put into the box, the positioning portion 524 presses against the cushioning material; and when the thermal management component 4 is put into the box, the tooling piece is conveniently connected to the positioning portion 524 extending from the base 523 .

[0171] Exemplarily, the current collector 52 and the transmission mechanism 6 are formed separately, and the main body 51 is sleeved on the transmission mechanism 6; or the current collector 52 and the transmission mechanism 6 are formed as one piece, the main body 51 is arranged around the transmission mechanism 6, and the positioning portion 524 extends from the end of the base 523 away from the main body 51 in the second direction Y.

[0172] See also Figure 14 , Figure 14 It is a partial structural diagram of a battery device provided in one embodiment of the present application.

[0173] In some embodiments, as Figure 5 、 Figure 6 and Figure 14 As shown, the battery device 2 further includes a heat-conducting layer 82 , which is disposed between the battery cell 3 and the heat exchange mechanism 5 .

[0174] In these embodiments, a heat conductive layer 82 is provided between the battery cell 3 and the heat exchange mechanism 5 to improve the heat exchange efficiency between the heat exchange mechanism 5 and the battery cell 3 , improve the regulation capability of the thermal management component 4 on the battery cell 3 , and improve the performance of the battery device 2 .

[0175] Illustratively, the heat-conducting layer 82 is a heat-conducting colloid, which not only improves the heat conductivity between the battery cell 3 and the heat exchange mechanism 5 , but also can bond and fix the battery cell 3 and the heat exchange mechanism 5 to improve the stability of the battery device 2 .

[0176] Specifically, the heat conducting layer 82 is provided on both sides of the battery cell 3 in the first direction X, so as to increase the contact area between the heat conducting layer 82 and the battery cell 3 and the heat exchange mechanism 5 .

[0177] Optionally, during the assembly of the battery device 2 in the embodiment of the present application, a heat conductive layer 82 is first set on the surface of the heat exchange mechanism 5, and then the thermal management component 4 and the battery cell 3 are both installed in the box 202, and the battery cell 3 is in contact with the heat exchange mechanism 5 through the heat conductive layer 82.

[0178] In a second aspect, an embodiment of the present application provides an electrical device, comprising the battery device of any embodiment of the first aspect described above.

[0179] In some embodiments, as Figures 1 to 14 As shown, the battery device 2 includes a box body 202, a battery cell 3 and a thermal management component 4. The box body 202 includes a wall plate 2023 and a accommodating cavity 2024 enclosed by the wall plate 2023. The positioning groove 81 is provided on the inner surface of the wall plate 2023 and extends along the third direction Z; the battery cell 3 is provided in the accommodating cavity 2024; the thermal management component 4 includes a heat exchange mechanism 5 and a transmission mechanism 6 connected to each other. The heat exchange mechanism 5 includes a main body 51 and a current collector 52. The main body 51 is heat-conductively connected to the battery cell 3 along the first direction X. The current collector 52 is provided at least at one end of the main body 51 in the second direction Y. The current collector 52 includes a base 523 and a positioning portion 524. The base 523 is connected to the transmission mechanism 6. The positioning portion 524 extends from the base 523 in the third direction Z near the bottom of the accommodating cavity 2024. At one end, at least part of the positioning portion 524 extends away from the base 523 along the second direction Y into the positioning groove 81, the main body 51 is connected to the transmission mechanism 6 through the base 523, the transmission mechanism 6 and the current collector 52 are integrally formed, or the transmission mechanism 6 and the current collector 52 are separately formed and welded to each other, the transmission mechanism 6 is arranged between at least one side of the battery cell 3 in the second direction Y and the wall plate 2023, the transmission mechanism 6 is arranged by integral injection molding, and extends continuously in the first direction X, the transmission mechanism 6 includes a chamber 61, the chamber 61 extends in the first direction X, and connects the heat exchange mechanism 5 and the external environment, the cross-sectional area of ​​the chamber 61 in the first direction X remains unchanged, the heat exchange mechanism 5 is connected to the transmission mechanism 6, and the transmission mechanism 6 is used to input and / or output heat exchange medium to the heat exchange mechanism 5.

[0180] In these embodiments, the battery device 2 includes a box body 202, a battery cell 3 and a thermal management component 4. The box body 202 includes a wall panel 2023 and a receiving cavity 2024 enclosed by the wall panel 2023. The battery cell 3 is arranged in the receiving cavity 2024. The box body 202 plays a role in accommodating and protecting the battery cell 3. The thermal management component 4 includes a heat exchange mechanism 5 and a transmission mechanism 6. The heat exchange mechanism 5 is thermally connected to the battery cell 3 along a first direction X. The heat exchange mechanism 5 is used to adjust the temperature of the battery cell 3. The transmission mechanism 6 is arranged on the battery cell 3 at its first direction X. Between at least one side in the second direction Y and the wall panel 2023, the heat exchange mechanism 5 is connected to the external environment through the transmission mechanism 6, so that the transmission mechanism 6 can input or output heat exchange medium to the heat exchange mechanism 5. By connecting the heat exchange mechanism 5 and the transmission mechanism 6 that continuously extends in the first direction X, the number of overall parts of the thermal management component 4 is reduced, thereby simplifying the structure of the thermal management component 4, reducing the processing difficulty of the thermal management component 4, reducing the number of its overall connection interfaces, reducing the risk of leakage of the temperature pipe assembly, and improving the reliability of the temperature pipe assembly and the battery device 2.

[0181] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body comprises a wall panel and a receiving cavity enclosed by the wall panel; A battery cell is disposed in the accommodating cavity; A thermal management component includes a heat exchange mechanism and a transmission mechanism that are interconnected. The heat exchange mechanism is thermally connected to the battery cell along a first direction. The transmission mechanism is arranged between at least one side of the battery cell in a second direction and the wall plate and extends continuously in the first direction. The heat exchange mechanism is connected to the transmission mechanism. The transmission mechanism is used to input and / or output heat exchange medium to the heat exchange mechanism. The first direction and the second direction intersect.

2. The battery device according to claim 1, wherein: The transmission mechanism is provided by integral injection molding.

3. The battery device according to claim 1, wherein: The transmission mechanism includes a chamber, which extends in the first direction and connects the heat exchange mechanism with the external environment. The cross-sectional area of ​​the chamber in the first direction remains unchanged.

4. The battery device according to claim 1, wherein: The heat exchange mechanism includes a body and a current collector, wherein the body is thermally connected to the battery cell along the first direction, the current collector is provided at at least one end of the body in the second direction, and the body is connected to the transmission mechanism through the current collector. The transmission mechanism and the current collector are integrally formed, or the transmission mechanism and the current collector are separately formed and connected to each other.

5. The battery device according to claim 4, characterized in that The transmission mechanism and the current collector are formed separately and welded together.

6. The battery device according to claim 4, characterized in that The transmission mechanism and the current collector are formed and arranged separately, the current collector includes a through hole, the hole wall of the through hole is provided with a first opening, the surface of the transmission mechanism is provided with a second opening, the current collector is sleeved on the transmission mechanism through the through hole, and the transmission mechanism and the current collector are connected through the first opening and the second opening.

7. The battery device according to claim 4, characterized in that The thermal management component also includes a limiting protrusion and a limiting groove. The transmission mechanism and the current collector are formed separately. The outer surface of the current collector is provided with one of the limiting protrusion or the limiting groove. The outer surface of the transmission mechanism is provided with the other of the limiting protrusion or the limiting groove. At least part of the limiting protrusion is accommodated in the limiting groove.

8. The battery device according to any one of claims 1 to 7, characterized in that: The box body further includes a positioning groove, which is provided on the inner surface of the wall plate and extends along a third direction. At least a portion of the thermal management component is accommodated in the positioning groove. The first direction, the second direction and the third direction intersect with each other.

9. The battery device according to claim 8, characterized in that The heat exchange mechanism includes a body and a current collector. The body is spaced apart from the battery cell along the first direction. The current collector is disposed at at least one end of the body in the second direction. The body is connected to the transmission mechanism through the current collector. The current collector includes a base and a positioning portion, the base is connected to the transmission mechanism, the positioning portion is arranged at one end of the base close to the bottom of the accommodating cavity in the third direction, and at least part of the positioning portion extends away from the base along the second direction into the positioning groove.

10. The battery device according to claim 1, wherein: The battery device further includes a heat-conducting layer, which is arranged between the battery cell and the heat exchange mechanism.

11. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 10.

Images