Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body, a battery monomer and a heat exchange assembly, the heat exchange assembly comprises a heat exchange mechanism, a current collector and an external connection piece which are connected with one another, the heat exchange mechanism comprises a first heat exchange unit, the first heat exchange unit comprises a first main body part and two first connection parts, and the first main body part is in heat conduction connection with the battery monomer to balance the temperature of the battery monomer; the two first connecting parts are connected to the first main body part and the current collector, and under the condition that the external connecting piece and at least part of the first main body part are overlapped in the second direction, the two ends of at least one first connecting part in the first direction are arranged in a staggered mode in the second direction, so that interference between the first connecting parts and the external connecting piece is avoided; one end, deviating from the first main body part, of the first connecting part and the external connecting piece are arranged on the current collector at an interval, so that the size requirements of the current collector and the first main body part are reduced, the overall size of the heat exchange assembly is favorably reduced, and the internal space utilization rate of 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] A battery device typically includes several battery cells, which require a stable temperature environment to operate efficiently. Therefore, the battery device also includes a heat exchange component. The heat exchange component is thermally connected to the battery cells to stabilize the temperature of the battery cells. However, how to reduce the volume of the heat exchange component to improve the internal space utilization of the battery device is a technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can reduce the volume of a heat exchange component to improve the internal space utilization of the battery device.

[0005] In the first aspect, the present application provides a battery device, comprising a box; a battery cell, arranged in the box; a heat exchange assembly, comprising a heat exchange mechanism, a current collector and an external component connected to each other, the heat exchange mechanism comprising a first heat exchange unit, the first heat exchange unit comprising a first main body and two first connecting parts, the first main body and the battery cell are thermally connected, the first connecting part connects the current collector and the first main body, the current collector and the first main body are spaced apart in a first direction, the external component overlaps with at least part of the first main body in a second direction, wherein at least one first connecting part is staggered at its two ends in the first direction in the second direction, the end of the first connecting part facing away from the first main body and the external component are spaced apart in the second direction, and the first direction and the second direction intersect.

[0006] In an embodiment of the present application, a battery device includes a housing, battery cells, and a heat exchange assembly. The battery cells are housed within the housing. The heat exchange assembly includes a heat exchange mechanism, a current collector, and an external connector that are interconnected. A heat exchange medium circulates between the heat exchange mechanism and the external environment through the external connector and the current collector. The heat exchange mechanism includes a first heat exchange unit, which includes a first main body and two first connecting portions. The first main body is thermally connected to the battery cells to equalize the temperature of the battery cells. The two first connecting portions are connected to the first main body and the current collector to allow the heat exchange medium to flow between the first main body and the current collector. When the external connector overlaps at least a portion of the first main body in a second direction, at least one first connecting portion is staggered in the second direction at both ends of the first main body to avoid interference with the external connector. The end of the first connecting portion facing away from the first main body and the external connector are spaced apart on the current collector along the second direction. This reduces the size requirements of the current collector and the first main body in the first direction, helps reduce the overall size of the heat exchange assembly, improves internal space utilization of the battery device, and increases the energy density of the battery device.

[0007] In some embodiments, at least one first connecting portion extends in the first direction and is obliquely disposed with respect to the current collector in the second direction.

[0008] In the embodiment of the present application, the inclined first connection portion can not only reduce the processing difficulty of the first heat exchange unit, but also help reduce the flow resistance of the heat exchange medium in the first heat exchange unit, thereby improving the heat exchange effect of the heat exchange component.

[0009] In some embodiments, the two first connection portions are spaced apart in the second direction, the external connection member is disposed between the two first connection portions of the same first main body portion, and at least one first connection portion extends in the first direction and is inclined to the current collector away from the external connection member in the second direction.

[0010] In the solution of the embodiment of the present application, the external connection part is arranged between the two first connection parts of the same first main body part, at least one first connection part extends in the first direction, and is arranged obliquely to the current collector away from the external connection part in the second direction, so that the first connection part obtains a larger operating space, reducing the difficulty of connecting the first connection part and the current collector.

[0011] In some embodiments, two first connection portions extend in a first direction and are arranged on the current collector at an angle away from each other along a second direction, wherein the first connection portion includes a side facing the other first connection portion, and the first connection portion is arranged on the end face of the first main body portion in its first direction, and the angles between the side faces and the end faces of the two first connection portions are the same.

[0012] In the solution of the embodiment of the present application, the angles between the side faces and the end faces of the two first connecting parts are the same, which helps to balance the flow resistance of the heat exchange medium in the two first connecting parts.

[0013] In some embodiments, the two first connection portions are spaced apart along the second direction, the external connection member and the first heat exchange unit are spaced apart along the second direction, and at least one first connection portion extends in the first direction and is tilted away from the external connection member and disposed on the current collector in the second direction.

[0014] In the solution of the embodiment of the present application, the external connection member and the first heat exchange unit are spaced apart along the second direction, at least one first connection portion extends in the first direction and is inclined to the collector away from the external connection member in the second direction, which helps to reduce the size of the first heat exchange unit in the second direction so that more heat exchange units can be arranged in the second direction in the box.

[0015] In some embodiments, the current collector includes a first pipeline and a second pipeline spaced apart in a first direction, the second pipeline is located between the first pipeline and the first main body along the first direction, the heat exchange assembly includes two external parts, the two external parts are respectively provided in the first pipeline and the second pipeline, and the two first connecting parts of the same first heat exchange unit are respectively connected to the first pipeline and the second pipeline, wherein one of the two first connecting parts includes a first segment and a second segment connected to each other, the first segment is connected to the first main body, and it extends in the first direction and is inclined in the second direction, one end of the second segment is connected to the first segment, and the other end thereof extends along the first direction and is connected to the first pipeline.

[0016] In the solution of the embodiment of the present application, two external parts are respectively arranged in the first pipeline and the second pipeline, and the two first connecting parts of the same first heat exchange unit are respectively connected to the first pipeline and the second pipeline, so that the heat exchange medium can be input and output between the external environment and the first heat exchange unit through the first pipeline, the second pipeline and the two external parts. One of the first connecting parts includes a first segment and a second segment connected to each other. The first segment is tilted to avoid the external part, and the second segment extends along the first direction to connect to the first pipeline, which helps to reduce the size of the first heat exchange unit in the second direction and reduce the material cost of the first heat exchange unit.

[0017] In some embodiments, the heat exchange mechanism includes two first heat exchange units, and the two external connecting components are respectively disposed between the two first connecting portions of the two first heat exchange units.

[0018] In the solution of the embodiment of the present application, the two external parts are respectively arranged between the two first connection parts of the two first heat exchange units, which can not only reduce the processing difficulty of the first heat exchange unit, but also improve the problem of excessive flow resistance of the heat exchange medium in the first connection part due to the excessive inclination angle and excessive length of the first connection part.

[0019] In some embodiments, the heat exchange mechanism also includes a second heat exchange unit, the second heat exchange unit and the first heat exchange unit are spaced apart along the second direction, the second heat exchange unit includes a second main body and a second connecting part connected to each other, the second main body and the external part are spaced apart in the second direction, the second main body is thermally conductively connected to the battery cell, and the second connecting part is connected to the current collector along the first direction.

[0020] In the solution of the embodiment of the present application, the heat exchange mechanism also includes a second heat exchange unit, the second main body and the external connection part of the second heat exchange unit are arranged at intervals in the second direction, and the second main body is connected to the collector along the first direction, thereby reducing the flow resistance of the heat exchange medium at the second connection part, which helps to improve the overall heat exchange performance of the heat exchange component.

[0021] In some embodiments, the battery cell includes a shell and two electrode terminals, the electrode terminals extend from the shell along the third direction, the two electrode terminals are spaced apart along the second direction, at least part of the heat exchange mechanism is located between the two electrode terminals, and the first direction, the second direction and the third direction intersect with each other.

[0022] In the embodiment of the present application, at least part of the heat exchange mechanism is arranged between two electrode terminals, which helps the heat exchange component to fully utilize the space between adjacent electrode terminals, improve the space utilization rate within the battery device, and improve the energy density of the battery device.

[0023] 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

[0024] 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:

[0025] Figure 1 is a structural schematic diagram of a vehicle provided in one embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of a battery device provided in one embodiment of the present application;

[0027] Figure 3 This is a schematic structural diagram of a battery module provided in one embodiment of the application;

[0028] Figure 4 is an exploded view of a battery cell provided in one embodiment of the present application;

[0029] Figure 5 is an exploded view of a battery device provided in one embodiment of the present application;

[0030] Figure 6 This is a partial structural diagram of a heat exchange assembly of a battery device provided in one embodiment of the present application;

[0031] Figure 7 This is a partial structural diagram of a first heat exchange unit of a battery device provided in one embodiment of the present application;

[0032] Figure 8 is a structural schematic diagram of a heat exchange assembly of a battery device provided in another embodiment of the present application;

[0033] Figure 9 This is a partial structural diagram of a heat exchange assembly of a battery device provided in another embodiment of the present application;

[0034] Figure 10 This is a schematic structural diagram of a heat exchange assembly of a battery device provided in another embodiment of the present application;

[0035] Figure 11 Schematic diagram of the structure of a battery device provided in one embodiment of the present application.

[0036] Reference numerals:

[0037] 1. Vehicle; 101. Motor; 102. Controller; 2. Battery device; 201. Battery module; 202. Case; 2021. First case; 2022. Second case;

[0038] 3. Battery cell; 31. Housing; 32. Electrode terminal; 33. Electrode assembly;

[0039] 4. Heat exchange assembly; 41. Heat exchange mechanism; 42. Current collector; 43. External connection; 421. First pipeline; 422. Second pipeline;

[0040] 5. First heat exchange unit; 51. First main body; 52. First connecting portion; 511. End surface; 521. Side surface; 522. First segment; 523. Second segment;

[0041] 6. Second heat exchange unit; 61. Second main body; 62. Second connecting portion;

[0042] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] A battery device typically includes several battery cells, which require a stable temperature environment to work efficiently. Therefore, the battery device also includes a heat exchange component, which is thermally connected to the battery cells to stabilize the temperature of the battery cells. However, the heat exchange component occupies space inside the battery device, resulting in a decrease in the energy utilization rate of the battery device.

[0051] The reason for the above problem is that during the assembly of the heat exchange component, both the external component and the heat exchange mechanism need to be connected to the current collector, and since the external component needs to pass through the box, when the position of the opening on the box is fixed, the position of the external component on the current collector is fixed, which causes the heat exchange mechanism to interfere with the installation position of the external component on the current collector along the first direction. At this time, two pipelines spaced apart in the first direction need to be set on the current collector to install the external component and the heat exchange mechanism respectively, resulting in the heat exchange component being too large in size in the first direction, and the heat conductive component occupying too much space inside the box, resulting in a decrease in the energy density of the battery device.

[0052] Based on the above problems, embodiments of the present application provide a battery device, comprising a housing, battery cells, and a heat exchange assembly. The battery cells are housed in the housing. The heat exchange assembly comprises an interconnected heat exchange mechanism, a current collector, and an external connector. A heat exchange medium circulates between the heat exchange mechanism and the external environment through the external connector and the current collector. The heat exchange mechanism comprises a first heat exchange unit, comprising a first main body and two first connecting portions. The first main body is thermally connected to the battery cells to equalize the temperature of the battery cells. The two first connecting portions are connected to the first main body and the current collector to allow the heat exchange medium to flow between the first main body and the current collector. When the external connector overlaps with at least a portion of the first main body in a second direction, at least one first connecting portion is staggered in the second direction at both ends of the first main body to avoid interference with the external connector. The end of the first connecting portion facing away from the first main body and the external connector are spaced apart on the current collector along the second direction. This reduces the size requirements of the current collector and the first main body in the first direction, helps reduce the overall size of the heat exchange assembly, improves the internal space utilization of the battery device, and improves the energy density of the battery device.

[0053] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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).

[0059] 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.

[0060] Please refer to Figure 1 , Figure 1 A 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.

[0061] 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 .

[0062] Figure 2 FIG2 shows a schematic structural diagram of a battery device 2 according to an embodiment of the present application.

[0063] 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.

[0064] In some embodiments, a battery cell 3 assembly is generally formed by arranging a plurality of battery cells 3 .

[0065] 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.

[0066] 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 .

[0067] 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 .

[0068] 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 .

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Figure 3 A schematic structural diagram of a battery module 201 according to an embodiment of the present application is shown.

[0073] In some embodiments, as Figure 2 and Figure 3As 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.

[0074] 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 .

[0075] 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 33.

[0076] The electrode assembly 33 is a component in the battery cell 3 where electrochemical reactions occur. One or more electrode assemblies 33 may be contained in the shell 31. The electrode assembly 33 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 32 to form a current loop.

[0077] The electrode assembly 33 may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0078] In some embodiments, the electrode assembly 33 is a wound structure in which the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0079] In some embodiments, the electrode assembly 33 has a laminated structure. As an example, multiple positive and negative electrode sheets can be provided, and the multiple positive and negative electrode sheets can be alternately stacked. Multiple separators can be provided and respectively disposed between any adjacent positive or negative electrode sheets. Alternatively, the separators can be provided continuously and folded between any adjacent positive or negative electrode sheets.

[0080] In some embodiments, the shape of the electrode assembly 33 can be cylindrical, flat, or polygonal.

[0081] In some embodiments, the electrode assembly 33 is provided with tabs, which can conduct current from the electrode assembly 33. The tabs include a positive tab and a negative tab.

[0082] 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 33, 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, if the housing 31 is non-sealed, it protects the electrode assembly 33. A sealing bag is provided between the housing 31 and the electrode assembly 33 to encapsulate the electrode assembly 33 and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. If the housing 31 is sealed, it encapsulates the electrode assembly 33, the electrolyte, and other components.

[0083] 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 3 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.

[0084] 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.

[0085] In some embodiments, the electrode terminal 32 can be provided on the end cap assembly or on the housing 31, and the electrode terminal 32 is electrically connected to the tab. The electrode terminal 32 can be directly connected to the tab or indirectly connected to the tab via a switching mechanism.

[0086] See also Figure 5 and Figure 6 , Figure 5 is an exploded view of a battery device provided in one embodiment of the present application; Figure 6 Schematic diagram of a portion of the structure of a heat exchange component of a battery device provided in one embodiment of the present application.

[0087] First, as Figure 5 and Figure 6As shown, the present application provides a battery device 2, which includes a housing 202, a battery cell 3 and a heat exchange assembly 4, wherein the battery cell 3 is arranged in the housing 202; the heat exchange assembly 4 includes a heat exchange mechanism 41, a current collector 42 and an external component 43 connected to each other, the heat exchange mechanism 41 includes a first heat exchange unit 5, the first heat exchange unit 5 includes a first main body 51 and two first connecting parts 52, the first main body 51 is thermally connected to the battery cell 3, the first connecting parts 52 connect the current collector 42 and the first main body 51, the current collector 42 and the first main body 51 are spaced apart in a first direction X, the external component 43 overlaps with at least a portion of the first main body 51 in a second direction Y, wherein at least one first connecting part 52 is staggered at its two ends in the first direction X in the second direction Y, and the end of the first connecting part 52 away from the first main body 51 is spaced apart from the external component 43 in the second direction Y, and the first direction X and the second direction Y intersect.

[0088] In the embodiment of the present application, the battery device 2 includes a box body 202, a battery cell 3 and a heat exchange component 4. The battery cell 3 is accommodated in the box body 202. The heat exchange component 4 includes a heat exchange mechanism 41, a current collector 42 and an external component 43 that are interconnected. The heat exchange medium circulates between the heat exchange mechanism 41 and the external environment through the external component 43 and the current collector 42. The heat exchange mechanism 41 includes a first heat exchange unit 5. The first heat exchange unit 5 includes a first main body 51 and two first connecting parts 52. The first main body 51 is thermally connected to the battery cell 3 to balance the temperature of the battery cell 3. The two first connecting parts 52 are connected to the first main body 51 and the current collector 42 so that the heat exchange medium circulates between the heat exchange mechanism 41 and the external environment. The liquid flows between the first main body 51 and the current collector 42, and when the external component 43 overlaps with at least part of the first main body 51 in the second direction Y, at least one first connecting portion 52 is arranged at both ends of the first direction X, staggered in the second direction Y to avoid interference between the first connecting portion 52 and the external component 43, so that the end of the first connecting portion 52 away from the first main body 51 and the external component 43 are spaced apart along the second direction Y on the current collector 42, thereby reducing the size requirements of the current collector 42 and the first main body 51 in the first direction X, helping to reduce the overall size of the heat exchange assembly 4, thereby improving the internal space utilization of the battery device 2 and improving the energy density of the battery device 2.

[0089] Optionally, multiple battery cells 3 are arranged in the box body 202 at intervals to increase the capacity of the battery device 2. Exemplarily, the multiple battery cells 3 are arranged in the box body 202 in an array along the first direction X and / or the second direction Y.

[0090] The heat exchange assembly 4 includes an interconnected heat exchange mechanism 41, a current collector 42, and an external connector 43. The heat exchange mechanism 41 includes a heat exchange channel that holds a heat exchange medium. The current collector 42 includes a manifold. The external connector 43 and the heat exchange channel are both connected to the manifold. The external connector 43 connects the manifold to the external environment. The heat exchange medium circulates between the external environment and the heat exchange mechanism 41 through the external connector 43 and the current collector 42. The heat exchange mechanism 41 is thermally connected to the battery cells 3 to regulate their temperature. Exemplary heat exchange media can include water, ethanol, ethylene glycol, etc.

[0091] Optionally, the heat exchange assembly 4 includes a plurality of heat exchange mechanisms 41 spaced apart along the second direction Y. After the heat exchange medium enters the manifold through the external connector 43, it is distributed to each heat exchange mechanism 41 through the manifold. For example, two, three, four, five, six, or other heat exchange mechanisms 41 are provided in the heat exchange assembly 4.

[0092] Optionally, the heat exchange mechanism 41 is disposed on one side of the battery cell 3 in the second direction Y or the third direction Z, and the current collector 42 is spaced apart from the battery cell 3 along the first direction X.

[0093] Exemplarily, the current collector 42 is a pipeline extending in the second direction Y, and the external connection component 43 and the heat exchange mechanism 41 are both arranged in the pipeline along the second direction Y.

[0094] Optionally, a through hole is provided on the wall of the box body 202, one end of the external connection member 43 is connected to the current collector 42, and the other end thereof extends out of the box body 202 through the through hole. Exemplarily, the external connection member 43 extends out of the box body 202 along the first direction X.

[0095] The heat exchange mechanism 41 includes at least one first heat exchange unit 5, which includes a first main body 51 and a first connecting part 52. The first main body 51 is thermally connected to the battery cell 3, and the first connecting part 52 is connected to the first main body 51 and the collector 42. The heat exchange flow channel of the first connecting part 52 is connected to the heat exchange flow channel of the first main body 51 and the collecting cavity of the collector 42. As the heat exchange medium circulates between the first main body 51 and the external environment, the temperature of the battery cell 3 is adjusted.

[0096] The first main body 51 and the battery cell 3 are thermally connected, which means that the first main body 51 and the battery cell 3 are in direct contact and connection so that the first main body 51 and the battery cell 3 exchange heat; or the first main body 51 and the battery cell 3 are in indirect contact through a thermally conductive medium, which can be a metal part or a thermally conductive colloid, etc.

[0097] Exemplarily, the orthographic projection of the first main body portion 51 in the third direction Z covers the battery cell 3 , or the first main body portion 51 is connected to the battery cell 3 in the third direction Z.

[0098] Optionally, the first main body 51 and the first connecting portion 52 are integrally formed to enhance the sealing performance of the first heat exchange unit 5 and reduce the risk of leakage of the heat exchange mechanism 41. Exemplarily, the first main body 51 and the first connecting portion 52 are integrally stamped.

[0099] Exemplarily, the first main body portion 51 is in the shape of a rectangular plate and extends in the first direction X.

[0100] Optionally, the first heat exchange unit 5 includes a first main body 51 and two first connection parts 52, the two first connection parts 52 are connected to one end of the first main body 51 facing the collector 42 in the first direction X, and the two first connection parts 52 are spaced apart in the second direction Y. The two first connection parts 52 are respectively used to input or output heat exchange medium to the first main body 51.

[0101] The external component 43 overlaps with at least a portion of the first main body 51 in the second direction Y, which means that the orthographic projection of the external component 43 on the box body 202 along the first direction X and the orthographic projection of at least a portion of the first main body 51 on the box body 202 along the first direction X coincide with each other or are arranged to face each other in the third direction Z.

[0102] Illustratively, when the external member 43 overlaps at least a portion of the first main body 51 in the second direction Y, when the first connecting portion 52 extends linearly in the first direction X, the first connecting portion 52 and the external member 43 at least partially overlap at the location of the current collector 42 .

[0103] When the external component 43 overlaps with at least a portion of the first main body 51 in the second direction Y, in the related art, the heat exchange mechanism 41 extends as a whole along the first direction X. At this time, the heat exchange mechanism 41 and the external component 43 are connected to the same position of the current collector 42, and the two interfere with each other. At this time, the current collector 42 needs to be set as two pipelines spaced apart in the first direction X, and the external component 43 and the heat exchange mechanism 41 are respectively connected to one pipeline.

[0104] In the embodiment of the present application, since at least one first connection portion 52 is staggered at both ends of its first direction X in the second direction Y, the first connection portion 52 and the external connection member 43 are spaced apart along the second direction Y, so that the first connection portion 52 can avoid the external connection member 43 on the collector 42 along the second direction Y, then the end where the first connection portion 52 is connected to the collector 42 and the external connection member 43 can be spaced apart along the second direction Y on the pipeline of the collector 42, without splitting the collector 42 into two pipelines in the first direction X, thereby reducing the overall size of the heat exchange component 4 in the first direction X.

[0105] Illustratively, one end of the first connecting portion 52 away from the first main body portion 51 and the at least one external connection member 43 are connected to the same pipeline of the current collector 42 along the second direction Y.

[0106] The first connection portion 52 is connected to the first main body portion 51 and the current collector 42 at both ends thereof in the first direction X, respectively.

[0107] Optionally, two first connection portions 52 are connected to the same first main body portion 51, and the two first connection portions 52 are staggered in the second direction Y at both ends of the first direction X; or one first connection portion 52 is staggered in the second direction Y at both ends of the first direction X, and the other first connection portion 52 extends along the first direction X to the current collector 42.

[0108] Optionally, the first connection portion 52 is staggered at both ends in the first direction X in the second direction Y, and the first connection portion 52 extends obliquely along a straight path in the first direction X and the second direction Y, and / or extends in a bent manner along a folded path.

[0109] Optionally, the heat exchange mechanism 41 includes at least two first heat exchange units 5 , the shape of each first heat exchange unit 5 should match the position of the external component 43 , and the shapes of each first heat exchange unit 5 are the same or different.

[0110] In some embodiments, as Figure 5 and Figure 6 As shown, at least one first connection portion 52 extends in the first direction X and is obliquely disposed with respect to the current collector 42 in the second direction Y.

[0111] In these embodiments, the inclined first connection portion 52 can not only reduce the processing difficulty of the first heat exchange unit 5 , but also help reduce the flow resistance of the heat exchange medium in the first heat exchange unit 5 , thereby improving the heat exchange effect of the heat exchange component 4 .

[0112] Specifically, at least one first connection portion 52 extends along a straight path in the first direction X and is obliquely disposed to the current collector 42 in the second direction Y to reduce flow resistance of the heat exchange medium in the first connection portion 52 .

[0113] Optionally, the first connecting portion 52 and the first main body portion 51 are connected in an arc transition to reduce the flow resistance at the connection between the first connecting portion 52 and the first main body portion 51 .

[0114] See also Figure 7 , Figure 7 It is a partial structural diagram of the first heat exchange unit of the battery device provided in one embodiment of the present application.

[0115] In some embodiments, as Figures 5 to 7 As shown, the two first connection parts 52 are arranged at intervals in the second direction Y, the external component 43 is arranged between the two first connection parts 52 of the same first main body part 51, and at least one first connection part 52 extends in the first direction X and is arranged obliquely on the current collector 42 away from the external component 43 in the second direction Y.

[0116] In these embodiments, the external component 43 is arranged between the two first connecting portions 52 of the same first main body portion 51, at least one first connecting portion 52 extends in the first direction X, and is arranged obliquely to the current collector 42 away from the external component 43 in the second direction Y, so that the first connecting portion 52 obtains a larger operating space, thereby reducing the difficulty of connecting the first connecting portion 52 and the current collector 42.

[0117] Exemplarily, at least one first connection portion 52 extends in the first direction X and is obliquely arranged on the current collector 42 away from the external component 43 in the second direction Y. As the first connection portion 52 moves away from the first main body portion 51 in the first direction X, the distance between the two first connection portions 52 in the second direction Y increases.

[0118] Optionally, in the first heat exchange unit 5, the two first connection parts 52 extend in the first direction X and are arranged obliquely on the collector 42 away from the external component 43 in the second direction Y. This not only allows sufficient space between the two first connection parts 52 to set the external component 43, but also balances the flow resistance of the heat exchange medium in the two first connection parts 52.

[0119] In some embodiments, as Figures 5 to 7 As shown, the two first connection portions 52 extend in the first direction X and are arranged on the current collector 42 at an angle away from each other along the second direction Y, wherein the first connection portion 52 includes a side surface 521 facing the other first connection portion 52, and the first connection portion 52 is arranged on the end surface 511 of the first main body portion 51 in the first direction X. The angle θ between the side surface 521 and the end surface 511 of the two first connection portions 52 is the same.

[0120] In these embodiments, the included angle θ between the side surface 521 and the end surface 511 of the two first connecting portions 52 is the same, which helps to balance the flow resistance of the heat exchange medium in the two first connecting portions 52 .

[0121] Illustratively, the angle between the axis of the heat exchange channel of the first connecting portion 52 and the straight line extending in the second direction Y is θ.

[0122] Optionally, the angle θ between the side surface 521 of the first connecting portion 52 and the end surface 511 is between 90° and 180°, and the specific angle can be designed by the user. For example, the angle between the side surface 521 of the first connecting portion 52 and the end surface 511 is 95°, 120°, 145°, 175°, etc.

[0123] See also Figure 8 , Figure 8 Schematic diagram of the structure of a heat exchange component of a battery device provided in another embodiment of the present application.

[0124] In some embodiments, as Figure 5 and Figure 8 As shown, the two first connection parts 52 are arranged at intervals along the second direction Y, the external connection part 43 and the first heat exchange unit 5 are arranged at intervals along the second direction Y, and at least one first connection part 52 extends in the first direction X and is inclined to the collector 42 away from the external connection part 43 in the second direction Y.

[0125] In these embodiments, the external connection member 43 and the first heat exchange unit 5 are spaced apart along the second direction Y, and at least one first connection portion 52 extends in the first direction X and is inclined to the collector 42 away from the external connection member 43 in the second direction Y, which helps to reduce the size of the first heat exchange unit 5 in the second direction Y so that more heat exchange units can be arranged in the second direction Y in the box body 202.

[0126] The external connection member 43 and the first heat exchange unit 5 are spaced apart along the second direction Y. Specifically, the two first connection portions 52 of the same first heat exchange unit 5 are divided into a first part and a second part. The first part is located between the external connection member 43 and the second part along the second direction Y. The first part extends in the first direction X and is obliquely arranged on the current collector 42 away from the external connection member 43 in the second direction Y.

[0127] Exemplarily, at least one first connection portion 52 extends in the first direction X and is obliquely arranged on the current collector 42 away from the external component 43 in the second direction Y. As the first connection portion 52 moves away from the first main body portion 51 in the first direction X, the distance between the two first connection portions 52 in the second direction Y decreases.

[0128] Optionally, one first connecting portion 52 extends in the first direction X and is tilted to the current collector 42 away from the external component 43 in the second direction Y, and another first connecting portion 52 is connected to the current collector 42 along the first direction X; or two first connecting portions 52 extend in the first direction X and are tilted to the current collector 42 away from the external component 43 in the second direction Y, so as to reduce the risk of interference between the two first connecting portions 52 on the current collector 42.

[0129] See also Figure 9 , Figure 9 This is a partial structural diagram of a heat exchange component of a battery device provided in another embodiment of the present application.

[0130] In some embodiments, as Figure 9As shown, the current collector 42 includes a first pipeline 421 and a second pipeline 422 spaced apart in a first direction X, the second pipeline 422 being located between the first pipeline 421 and the first main body 51 along the first direction X, the heat exchange assembly 4 includes two external connectors 43, the two external connectors 43 being respectively provided in the first pipeline 421 and the second pipeline 422, the two first connecting portions 52 of the same first heat exchange unit 5 being respectively connected to the first pipeline 421 and the second pipeline 422, wherein one of the two first connecting portions 52 includes a first segment 522 and a second segment 523 connected to each other, the first segment 522 being connected to the first main body 51, and extending in the first direction X and being inclined in the second direction Y, one end of the second segment 523 being connected to the first segment 522, and the other end thereof extending along the first direction X and being connected to the first pipeline 421.

[0131] In these embodiments, the two external connectors 43 are respectively provided in the first pipeline 421 and the second pipeline 422, and the two first connecting parts 52 of the same first heat exchange unit 5 are respectively connected to the first pipeline 421 and the second pipeline 422, so that the heat exchange medium can be input and output between the external environment and the first heat exchange unit 5 through the first pipeline 421, the second pipeline 422 and the two external connectors 43. One of the first connecting parts 52 includes a first segment 522 and a second segment 523 that are connected to each other. The first segment 522 is tilted to avoid the external connector 43, and the second segment 523 extends along the first direction X to be connected to the first pipeline 421, which helps to reduce the size of the first heat exchange unit 5 in the second direction Y and reduce the material cost of the first heat exchange unit 5.

[0132] Optionally, the current collector 42 includes a first pipeline 421 and a second pipeline 422 spaced apart. The first pipeline 421 is used to input heat exchange medium from the external connection 43 to the heat exchange mechanism 41. The heat exchange medium of the heat exchange mechanism 41 is output to the outside through the second pipeline 422 via the external connection 43. At least one external connection 43 is provided on each of the first pipeline 421 and the second pipeline 422. The two first connecting portions 52 of the same first heat exchange unit 5 are respectively connected to the first pipeline 421 and the second pipeline 422.

[0133] Optionally, the heat exchange component 4 includes two external components 43, and the two external components 43 have the same size to the box body 202 along the third direction Z. The external components 43 extend from the box body 202 along the first direction X, and part of the first pipeline 421 is bent to form an air avoidance area, and the external component 43 connected to the second pipeline 422 extends from the air avoidance area to the box body 202.

[0134] Exemplarily, the two first connecting parts 52 of the first heat exchange unit 5 are respectively a first part and a second part, the first part is connected to the first pipeline 421, the second part is connected to the second pipeline 422, the second part extends in the first direction X, and is obliquely arranged in the second direction Y to the second pipeline 422, the first part includes a first segment 522 and a second segment 523 connected to each other, the first segment 522 is obliquely arranged, and the second segment 523 is connected to the first pipeline 421 along the first direction X.

[0135] Optionally, the included angle between the side surface of the second portion facing the other first connection portion 52 and the end surface 511 is the same as the included angle between the side surface of the first segment 522 facing the other first connection portion 52 and the end surface 511 .

[0136] Optionally, the first segment 522 can extend obliquely in the second direction Y toward the center line of the first main body 51 in the second direction Y, or the first segment 522 can extend obliquely in the second direction Y away from the center line of the first main body 51 in the second direction Y.

[0137] In some embodiments, as Figure 9 As shown, the heat exchange mechanism 41 includes two first heat exchange units 5 , and two external connecting components 43 are respectively disposed between the two first connecting portions 52 of the two first heat exchange units 5 .

[0138] In these embodiments, the two external components 43 are respectively arranged between the two first connection parts 52 of the two first heat exchange units 5, which can not only reduce the processing difficulty of the first heat exchange unit 5, but also improve the problem of excessive flow resistance of the heat exchange medium in the first connection part 52 due to the excessive inclination angle and excessive length of the first connection part 52.

[0139] Illustratively, only one external connection member 43 is provided between the two first connection portions 52 of the first heat exchange unit 5 to reduce the inclination angle of the first connection portion 52 and reduce the difficulty of processing the first heat exchange unit 5 .

[0140] Specifically, the two external connectors 43 are respectively provided in the first pipeline 421 and the second pipeline 422 , the two external connectors 43 are spaced apart in the second direction Y, and the two external connectors 43 are respectively provided between the two first connection portions 52 of the two first heat exchange units 5 .

[0141] See also Figure 10 , Figure 10 Schematic diagram of the structure of a heat exchange component of a battery device provided in another embodiment of the present application.

[0142] In some embodiments, as Figure 10As shown, the heat exchange mechanism 41 also includes a second heat exchange unit 6. The second heat exchange unit 6 and the first heat exchange unit 5 are spaced apart along the second direction Y. The second heat exchange unit 6 includes a second main body 61 and a second connecting portion 62 that are connected to each other. The second main body 61 and the external component 43 are spaced apart in the second direction Y. The second main body 61 is thermally connected to the battery cell 3, and the second connecting portion 62 is connected to the current collector 42 along the first direction X.

[0143] In these embodiments, the heat exchange mechanism 41 also includes a second heat exchange unit 6, the second main body 61 and the external component 43 of the second heat exchange unit 6 are spaced apart in the second direction Y, and the second main body 61 is connected to the collector 42 along the first direction X, thereby reducing the flow resistance of the heat exchange medium in the second connection part 62, which helps to improve the overall heat exchange performance of the heat exchange component 4.

[0144] The second heat exchange unit 6 includes a second main body 61 and two second connecting portions 62. The second connecting portions 62 are connected to the second main body 61 and the current collector 42, so that the heat exchange medium can circulate between the current collector 42 and the second main body 61 through the second connecting portions 62. The two second connecting portions 62 are provided at one end of the second main body 61 facing the current collector 42 along the first direction X. The second connecting portions 62 are thermally connected to the battery cells 3 to regulate the temperature of the battery cells 3.

[0145] Optionally, the first main body portion 51 and the second main body portion 61 have the same size and shape to reduce the difficulty of processing the heat exchange mechanism 41 .

[0146] Optionally, the second main body portion 61 and the second connecting portion 62 are integrally formed to improve the sealing performance of the second heat exchange unit 6 .

[0147] Exemplarily, the heat exchange mechanism includes two first heat exchange units 5 and two second heat exchange units 6 , and the two second heat exchange units 6 are respectively arranged on both sides of the heat exchange component 4 in the second direction Y thereof.

[0148] The second main body portion 61 and the external connection member 43 are spaced apart in the second direction Y, and the second connection portion 62 is spaced apart from the external connection member 43 along the second direction Y on the current collector 42 .

[0149] It should be clear that the first connection portion 52 and the second connection portion 62 are spaced apart along the second direction Y on the current collector 42 to avoid mutual interference between the first heat exchange unit 5 and the second heat exchange unit 6 .

[0150] See also Figure 11 , Figure 11 Schematic diagram of the structure of a battery device provided in one embodiment of the present application.

[0151] In some embodiments, as Figures 4 to 6 and Figure 11As shown, the battery cell 3 includes a shell 31 and two electrode terminals 32. The electrode terminals 32 extend from the shell 31 along the third direction Z. The two electrode terminals 32 are spaced apart along the second direction Y. At least part of the heat exchange mechanism 41 is located between the two electrode terminals 32. The first direction X, the second direction Y and the third direction Z intersect with each other.

[0152] In these embodiments, at least part of the heat exchange mechanism 41 is disposed between two electrode terminals 32 , which helps the heat exchange component 4 fully utilize the space between adjacent electrode terminals 32 , thereby improving space utilization within the battery device 2 and increasing the energy density of the battery device 2 .

[0153] Specifically, the first main body portion 51 and / or the second main body portion 61 is disposed between the two electrode terminals 32 .

[0154] Optionally, the heat exchange mechanism 41 is adhesively connected to the housing 31 , so that the heat exchange mechanism 41 can be used to fix the battery cell 3 .

[0155] Optionally, an insulating layer is provided between the heat exchange mechanism 41 and the electrode terminals 32 and the busbar of the battery device 2 to improve the insulation performance of the heat exchange mechanism 41 .

[0156] 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.

[0157] In some embodiments, as Figures 1 to 11As shown, the battery device 2 includes a box body 202, a battery cell 3 and a heat exchange assembly 4. The battery cell 3 is arranged in the box body 202. The battery cell 3 includes a shell 31 and two electrode terminals 32. The electrode terminals 32 extend from the shell body 31 along the third direction Z. The two electrode terminals 32 are spaced apart along the second direction Y. The heat exchange assembly 4 includes a heat exchange mechanism 41, a current collector 42 and an external connector 43 that are connected to each other. The heat exchange mechanism 41 is located between the two electrode terminals 32. The heat exchange mechanism 41 includes a first heat exchange unit 5 and a second heat exchange unit 6. The first heat exchange unit 5 includes a first main body 51 and two first connecting parts 52. The first main body 51 is thermally connected to the battery cell 3. The first connecting part 52 connects the current collector 42 and the first main body 51. The current collector 42 and the first main body 51 are spaced apart in the first direction X. The external connector 43 overlaps with at least a portion of the first main body 51 in the second direction Y. The two first connecting parts 52 are spaced apart in the second direction Y. The external connection member 43 is arranged between two first connection portions 52 of the same first main body 51. The two first connection portions 52 extend in the first direction X and are arranged obliquely on the current collector 42 away from the external connection member 43 in the second direction Y. The first connection portion 52 includes a side surface 521 facing the other first connection portion 52. The first connection portion 52 is arranged on the end surface 511 of the first main body 51 in the first direction X. The angles between the side surfaces 521 and the end surface 511 of the two first connection portions 52 are the same. The end of the first connection portion 52 facing away from the first main body 51 is spaced apart from the external connection member 43 in the second direction Y. The second heat exchange unit 6 includes a second main body 61 and a second connection portion 62 connected to each other. The second main body 61 and the external connection member 43 are spaced apart in the second direction Y. The second main body 61 is thermally connected to the battery cell 3. The second connection portion 62 is connected to the current collector 42 along the first direction X. The first direction X, the second direction Y and the third direction Z intersect with each other.

[0158] In these embodiments, the battery device 2 includes a box body 202, a battery cell 3 and a heat exchange component 4. The battery cell 3 is accommodated in the box body 202. The heat exchange component 4 includes a heat exchange mechanism 41, a current collector 42 and an external component 43 that are interconnected. The heat exchange medium circulates between the heat exchange mechanism 41 and the external environment through the external component 43 and the current collector 42. The heat exchange mechanism 41 includes a first heat exchange unit 5. The first heat exchange unit 5 includes a first main body 51 and two first connecting parts 52. The first main body 51 is thermally connected to the battery cell 3 to balance the temperature of the battery cell 3. The two first connecting parts 52 are connected to the first main body 51 and the current collector 42 so that the heat exchange medium circulates between the first main body 51 and the current collector 42. The liquid flows between a main body 51 and the current collector 42, and when the external component 43 overlaps with at least part of the first main body 51 in the second direction Y, at least one first connecting portion 52 is arranged at both ends of the first direction X, staggered in the second direction Y to avoid interference between the first connecting portion 52 and the external component 43, so that the end of the first connecting portion 52 away from the first main body 51 and the external component 43 are spaced apart on the current collector 42 along the second direction Y, thereby reducing the size requirements of the current collector 42 and the first main body 51 in the first direction X, helping to reduce the overall size of the heat exchange assembly 4, thereby improving the internal space utilization of the battery device 2 and improving the energy density of the battery device 2.

[0159] 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: Box; A battery cell is disposed in the box; The heat exchange assembly includes a heat exchange mechanism, a current collector, and an external component connected to each other. The heat exchange mechanism includes a first heat exchange unit. The first heat exchange unit includes a first main body and two first connecting parts. The first main body is thermally connected to the battery cell. The first connecting parts connect the current collector and the first main body. The current collector and the first main body are spaced apart in a first direction. The external component overlaps with at least a portion of the first main body in a second direction. At least one of the first connecting parts is staggered in the second direction at both ends of the first direction, the end of the first connecting part away from the first main body and the external component are spaced apart in the second direction, and the first direction and the second direction intersect.

2. The battery device according to claim 1, wherein: At least one first connection portion extends in the first direction and is obliquely disposed with respect to the current collector in the second direction.

3. The battery device according to claim 2, characterized in that The two first connection parts are spaced apart in the second direction, the external connection part is arranged between the two first connection parts of the same first main body part, and at least one first connection part extends in the first direction and is inclined to the current collector away from the external connection part in the second direction.

4. The battery device according to claim 3, characterized in that The two first connecting portions extend in the first direction and are arranged obliquely on the current collector away from each other along the second direction. The first connection portion includes a side surface facing another first connection portion, the first connection portion is arranged on the end surface of the first main body portion in the first direction, and the angles between the side surface and the end surface of the two first connection portions are the same.

5. The battery device according to claim 2, wherein: The two first connection parts are spaced apart along the second direction, the external connection part and the first heat exchange unit are spaced apart along the second direction, and at least one first connection part extends in the first direction and is inclined to the current collector away from the external connection part in the second direction.

6. The battery device according to claim 2, wherein: The current collector includes a first pipeline and a second pipeline spaced apart in the first direction, the second pipeline being located between the first pipeline and the first main body along the first direction, the heat exchange assembly includes two external connectors, the two external connectors being respectively provided in the first pipeline and the second pipeline, and the two first connecting portions of the same first heat exchange unit being respectively connected to the first pipeline and the second pipeline. Among them, one of the two first connecting parts includes a first segment and a second segment connected to each other, the first segment is connected to the first main body, extends in the first direction, and is inclined in the second direction, one end of the second segment is connected to the first segment, and the other end extends along the first direction and is connected to the first pipeline.

7. The battery device according to claim 6, characterized in that The heat exchange mechanism includes two first heat exchange units, and the two external connecting components are respectively arranged between the two first connecting parts of the two first heat exchange units.

8. The battery device according to claim 1, wherein: The heat exchange mechanism also includes a second heat exchange unit, which is spaced apart from the first heat exchange unit along the second direction. The second heat exchange unit includes a second main body and a second connecting portion that are connected to each other. The second main body and the external component are spaced apart from each other in the second direction. The second main body is thermally conductively connected to the battery cell, and the second connecting portion is connected to the current collector along the first direction.

9. The battery device according to claim 1, wherein: The battery cell includes a shell and two electrode terminals, the electrode terminals extend from the shell along a third direction, the two electrode terminals are spaced apart along the second direction, at least part of the heat exchange mechanism is located between the two electrode terminals, and the first direction, the second direction and the third direction intersect with each other.

10. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 9.

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