Battery device and electric appliance

Abstract

The application discloses a battery device and an electric device. The battery device comprises a box, battery monomers and a thermal management assembly. The box is enclosed to form a containing cavity. A plurality of battery monomers are arranged in the containing cavity. The thermal management assembly comprises a first manifold, a second manifold and a plurality of heat exchange pieces. At least part of the heat exchange pieces are arranged between adjacent battery monomers. The heat exchange piece comprises a heat exchange main body and two manifold connecting parts which are connected in communication. The manifold connecting parts of each heat exchange piece are connected in communication with the first manifold and the second manifold respectively. The heat exchange main body comprises a shell and a flow channel partition. The shell encloses a heat exchange cavity. The heat exchange cavity comprises a flow channel area and two manifold areas which are connected in communication. The flow channel partition is arranged in the flow channel area and cooperates with the shell to form a plurality of flow channels. The two manifold connecting parts are connected in communication with the two manifold areas respectively. The battery device provided by the application can reduce cost and improve reliability.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] The development of battery technology must take into account multiple design factors. For example, improving the thermal management reliability of battery devices and reducing costs are important research directions in the battery field. Summary of the Invention

[0004] This application provides a battery device and electrical equipment that are easy to install and can reduce the required space.

[0005] In a first aspect, this application provides a battery device, including a housing, battery cells, and a thermal management component. The housing encloses a cavity; multiple battery cells are disposed in the cavity; the thermal management component includes a first manifold, a second manifold, and multiple heat exchange components, at least some of which are disposed between adjacent battery cells. Each heat exchange component includes a connected heat exchange body and two current collection connection portions, and the current collection connection portions of each heat exchange component are respectively connected to the first manifold and the second manifold; wherein, the heat exchange body includes a shell and a flow channel separator, the shell encloses a heat exchange cavity, the heat exchange cavity includes a connected flow channel region and two current collection regions, the flow channel separator is disposed in the flow channel region and together with the shell encloses multiple flow channels, and the two current collection connection portions are respectively connected to the two current collection regions.

[0006] In the technical solution of this application embodiment, the battery device is provided with a thermal management component for heat exchange with individual battery cells. The thermal management component further includes a heat exchange body and a current collector connection part. Multiple heat exchange bodies are connected to two current collector pipes through the current collector connection part, thereby eliminating the need to divide the current collector pipes into multiple segments and connect them separately to adjacent heat exchange bodies, reducing connection interfaces and lowering the risk of leakage. At the same time, the heat exchange body includes a shell and a flow channel area and a current collector area disposed within the shell. By integrating the function of the original end current collector into the heat exchange body, the original current collector structure and the connection interface between the current collector and the harmonica tube can be eliminated, further reducing the risk of leakage and improving reliability.

[0007] According to some embodiments of this application, the heat exchanger body further includes a sealing element. The flow channel has openings on opposite sides in its extending direction. The sealing element is located in the heat exchange cavity and disposed at the openings, and the sealing element can close part of the openings of the flow channel. By also incorporating the sealing element into the heat exchange cavity, the number of parts is further reduced and the risk of leakage is lowered.

[0008] According to some embodiments of this application, the sealing element, the flow channel separator, and at least part of the housing are integrally formed. This simplifies the manufacturing process and improves the reliability of the structural seal.

[0009] According to some embodiments of this application, the housing includes a first sub-part and a second sub-part. Each of the first and second sub-parts has a groove on one side facing each other. A flow channel separator and a sealing member are connected to the bottom wall of the groove in one of the first and second sub-parts. The first and second sub-parts are interlocked and connected, making the housing easy to manufacture.

[0010] According to some embodiments of this application, both the first sub-part and the second sub-part are provided with sidewalls extending towards each other, and the sidewalls of the first sub-part and the second sub-part are at least partially stacked and fixedly connected. This ensures a stable and reliable connection between the two sub-parts of the housing and provides good sealing performance.

[0011] According to some embodiments of this application, the sidewalls of the first sub-part and the second sub-part are bonded together, and / or welded together. This further improves the connection stability.

[0012] According to some embodiments of this application, the sidewalls of the first sub-part and the second sub-part are respectively provided with through holes. The through holes of the first sub-part and the through holes of the second sub-part correspond one-to-one and are arranged facing each other along the axial direction of the through holes. The current collection connection part is connected to the through holes. By connecting the through holes provided in the sidewalls with the current collection connection part, the processing steps of the housing are simplified.

[0013] According to some embodiments of this application, the current collection connection part is provided with two clamping parts. Along the arrangement direction of the first sub-part and the second sub-part, the first sub-part and the second sub-part are clamped between the two clamping parts, and the clamping parts are connected to the shell. This makes the connection between the current collection connection part and the heat exchange body stable and reliable.

[0014] According to some embodiments of this application, each heat exchanger body is provided with multiple flow channel partitions, which extend along the length of the heat exchanger body, and each flow channel partition has a sealing element at both ends in the length direction. This facilitates adjustment of the number of flow channels.

[0015] According to some embodiments of this application, the sealing members respectively disposed at both ends of the flow channel separator are symmetrically arranged along the length of the heat exchange body. Along the length, at least partially, the two flow collection zones are disposed on opposite sides of the flow channel zone. This extends the flow path of the heat exchange medium in the heat exchange body, facilitating adjustment of the heat exchange medium's flow rate.

[0016] According to some embodiments of this application, the current collector connection is connected to at least one of the two opposing surfaces of the heat exchange body in the thickness direction; and / or, the current collector connection is connected to at least one surface of the heat exchange body parallel to its thickness direction. The current collector connection can be selected at different connection positions according to the specific battery cell arrangement, etc., improving the application flexibility of the battery device.

[0017] According to some embodiments of this application, in the thickness direction of the heat exchanger body, the two sides of the flow channel partition abut against the two side walls of the shell, and the included angle between the flow channel partition and the opposite side walls of the shell in the thickness direction is less than 90°. This improves the support performance of the flow channel partition.

[0018] According to some embodiments of this application, both the first and second manifolds include a pipe body and multiple connecting portions communicating with the pipe body. Each connecting portion is provided with multiple clamps extending in a direction away from the pipe body, and the clamps engage with the manifold connecting portions. This allows for convenient and stable connection between the manifolds and the manifold connecting portions.

[0019] Secondly, according to the embodiments of this application, an electrical device is provided, including the battery device in any embodiment of the first aspect, the battery device being used to provide electrical energy. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 A simplified schematic diagram of a vehicle provided for some embodiments of this application;

[0022] Figure 2 Explosion-proof diagrams of battery devices provided in some embodiments of this application;

[0023] Figure 3 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of a thermal management component provided in some embodiments of this application;

[0025] Figure 5 Exploded view of heat exchanger provided in some embodiments of this application;

[0026] Figure 6 for Figure 5 An enlarged view of region P shown;

[0027] Figure 7 This is a partial structural diagram of a thermal management component provided in some embodiments of this application.

[0028] Figure label:

[0029] 1000 - Vehicles;

[0030] 100 - Battery device; 200 - Controller; 300 - Motor;

[0031] 10 - Housing; 20 - Individual battery cell; 30 - Thermal management components;

[0032] 11-First housing section; 12-Second housing section; 13-Receiving cavity; 31-First manifold; 32-Second manifold; 33-Heat exchanger;

[0033] 311-Tube body; 312-Connecting part; 313-Clamping claw; 331-Heat exchange main body; 332-Collection connection part; 333-Shell; 334-Flow channel separator; 335-Blocking part; 336-First sub-part; 337-Second sub-part; 338-Side wall; 339-Through hole;

[0034] 3321-Clamping part; 3331-Heat exchange cavity; 3332-Flow channel region; 3333-Collection region. Detailed Implementation

[0035] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0040] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0041] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0044] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0045] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0046] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0047] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0048] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0049] In some embodiments, the housing may be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the electrode assembly for outputting or inputting electrical energy into the battery cell.

[0050] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0051] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0052] In some embodiments, the battery device can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0053] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.

[0054] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0055] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0056] A battery device typically includes a housing, multiple battery cells housed within the housing, and a thermal management component for heat exchange with the battery cells. The housing provides containment, support, and protection, the battery cells provide power storage and charging / discharging functions, and the thermal management component heats or cools the battery cells, thereby enabling the battery cells to operate within a preset temperature range.

[0057] In embodiments incorporating a thermal management component, the component typically includes a heat exchanger and two manifolds. The manifolds communicate with chambers within the heat exchanger to form a complete flow channel, allowing the heat exchange medium to flow within the channel and exchange heat with the battery assembly. The heat exchanger is typically at least partially sandwiched between two rows or columns of battery cells to improve heat exchange efficiency.

[0058] Based on this, the applicant discovered that in existing battery devices, the manifold in the thermal management component is typically divided into multiple segments, each connected between two adjacent heat exchangers to form a complete flow channel. However, this structure requires numerous structural components, resulting in a large number of connections, a high risk of leakage, and difficulty in installation. Furthermore, since each heat exchanger usually includes a main harmonica tube structure and a current collector, there are also connections between them. Due to the numerous connections, if the connection tolerances between the various heat exchangers and the manifold segments accumulate, or if the current collector and the main harmonica tube experience uneven stress, gaps may easily appear at certain connections, preventing proper connection or causing detachment and leakage after connection. This severely impacts the reliability of the battery device and reduces installation efficiency.

[0059] In view of this, the present application provides a technical solution that, by adjusting the structure of the connection between the heat exchanger and the manifold in the thermal management component and integrating the current collector into the heat exchange body, can effectively reduce the number of parts and interfaces of the thermal management component, thereby reducing the possibility of leakage, improving the reliability of the battery device and reducing costs.

[0060] The technical solutions described in this application are applicable to battery devices and electrical equipment using battery devices. Electrical equipment includes, for example, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft. Electric toys include, for example, stationary or mobile electric toys, specifically, game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include, for example, metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, specifically, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0061] The battery cells described in this application are not limited to the electrical devices described above, but for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0062] Please see Figure 1 , Figure 1 This is a simplified schematic diagram of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 can be installed inside the vehicle 1000; specifically, for example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 100 may also include a controller 200 and a motor 300. The controller 200, for example, is used to control the battery to supply power to the motor 300. The battery device 100 can be used for starting the vehicle 1000, navigation, etc. Of course, the battery can also be used to drive the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide propulsion for the vehicle 1000.

[0063] Figure 2 This is an exploded schematic diagram of a battery device provided in some embodiments of this application. For example... Figure 2 As shown, the battery device 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10.

[0064] The housing 10 is used to accommodate the battery cell 20, and the housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing portion 11 and a second housing portion 12, which overlap each other, and together define a receiving cavity 13 for accommodating the battery cell 20. The second housing portion 12 may be a hollow structure with one end open, and the first housing portion 11 may be a plate-like structure, covering the open side of the second housing portion 12 to form a housing 10 with the receiving cavity 13; alternatively, both the first housing portion 11 and the second housing portion 12 may be hollow structures with one side open, with the open side of the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with the receiving cavity 13. Of course, the first housing portion 11 and the second housing portion 12 can have various shapes, such as cylinders, cuboids, etc.

[0065] In a battery, there can be one or more individual battery cells 20. If there are multiple individual battery cells 20, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple individual battery cells 20 are connected in both series and parallel configurations. Multiple individual battery cells 20 can be directly connected in series, in parallel, or in a mixed configuration, and then the entire assembly of the multiple individual battery cells 20 is housed within the housing 10. Alternatively, multiple individual battery cells 20 can first be connected in series, in parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10.

[0066] In some embodiments, there are multiple battery cells 20, which are first connected in series, parallel, or mixed to form a battery module. The multiple battery modules are then connected in series, parallel, or mixed to form a whole and housed in the housing 10.

[0067] Next, we will combine the appendix Figure 3 To be continued Figure 7 The structure of the battery device 100 and the electrical equipment is described.

[0068] Please refer to the following: Figures 3 to 5 , Figure 3 This is a partial structural diagram of a battery device provided in some embodiments of this application. Figure 4 This is a schematic diagram of the structure of a thermal management component provided in some embodiments of this application. Figure 5 This is an exploded schematic diagram of a heat exchanger provided in some embodiments of this application.

[0069] In a first aspect, this application provides a battery device 100, including a housing 10, battery cells 20, and a thermal management assembly 30. The housing 10 encloses a receiving cavity 13; multiple battery cells 20 are disposed in the receiving cavity 13; the thermal management assembly 30 includes a first current collector 31, a second current collector 32, and multiple heat exchange components 33, at least some of which are disposed between adjacent battery cells 20. Each heat exchange component 33 includes a connected heat exchange body 331 and two current collector connection portions 332. The flow collection connection 332 is connected to the first flow collection pipe 31 and the second flow collection pipe 32 respectively; wherein, the heat exchange body 331 includes a shell 333 and a flow channel separator 334. The shell 333 encloses to form a heat exchange cavity 3331. The heat exchange cavity 3331 includes a connected flow channel area 3332 and two flow collection areas 3333. The flow channel separator 334 is disposed in the flow channel area 3332 and together with the shell 333, it encloses to form multiple flow channels. The two flow collection connection parts 332 are connected to the two flow collection areas 3333 respectively.

[0070] This application provides a battery device 100, including a housing 10 and battery cells 20 and a thermal management component 30 disposed within the housing 10. The housing 10 encloses a receiving cavity 13, in which multiple battery cells 20 and the thermal management component 30 are disposed. The multiple battery cells 20 may be arranged in an array or other manner. The housing 10 may also include terminals, busbars, etc., for implementing preset electrical functions, which will not be described in detail here. Optionally, the housing 10 may include a first housing portion 11 and a second housing portion 12, which are interlocked and detachably connected, optionally by fasteners or the like. During the installation of the battery cell 20 assembly and the thermal management component 30 into the housing 10, the two can be first installed into one of the first housing portion 11 and the second housing portion 12, and then the other can be fastened. This split structure facilitates the installation and maintenance of the internal components.

[0071] Multiple battery cells 20 and thermal management components 30 are disposed in the housing cavity 13. The battery cells 20 can be cylindrical, cuboid or other shaped lithium-ion batteries. These battery cells 20 can be arranged in an array or other manner that can match the space inside the housing 10.

[0072] The thermal management assembly 30 includes a first manifold 31, a second manifold 32, and heat exchange components 33. Each heat exchange component 33 is connected to the first manifold 31 and the second manifold 32 to form a passage for the flow of the heat exchange medium. One of the first manifold 31 and the second manifold 32 is the inlet pipe, and the other is the outlet pipe. The heat exchange medium can be a gas or a liquid, such as air or coolant.

[0073] Furthermore, the heat exchanger 33 includes a heat exchange body 331 and a current collection connection 332. The heat exchange body 331 has a heat exchange cavity 3331 inside for containing the heat exchange medium. The heat exchange body 331 is the main structure mainly used for heat exchange, and it is at least partially disposed between adjacent battery cells 20 for heat exchange with the battery cells 20 on both sides, heating or cooling them. The current collection connection 332 connects the heat exchange body 331 and the current collection pipe. Two current collection connections 332 in the same heat exchanger 33 can be disposed on the same side of the heat exchange body 331, so that the first current collection pipe 31 and the second current collection pipe 32 can be disposed on the same side of multiple battery cells 20; or, the first current collection pipe 31 and the second current collection pipe 32 can be disposed on opposite sides of multiple battery cells 20 respectively, so as to provide more space for the current collection area 3333.

[0074] Based on this, the heat exchange body 331 further includes a shell 333 and a flow channel partition 334 disposed in the shell 333, wherein the shell 333 encloses to form a heat exchange cavity 3331, which is used to contain the heat exchange medium to realize heat exchange with the battery cell 20.

[0075] Meanwhile, the heat exchange cavity 3331 includes a flow channel region 3332 and a flow collection region 3333. A flow channel separator 334 is disposed in the flow channel region 3332 of the heat exchange cavity 3331 to divide the flow channel region 3332 into multiple flow channels. The flow collection region 3333 is used to converge the two ends of the multiple flow channels into one place, and then connects to the first flow collection pipe 31 and the second flow collection pipe 32 through the flow collection connection part 332. Thus, taking the first flow collection pipe 31 as the inlet pipe as an example, the heat exchange medium can flow from the first flow collection pipe 31 to a flow collection region 3333 inside the heat exchange body 331, then flow through the multiple flow channels of the flow channel region 3332 to another flow collection region 3333, and then flow out through the second flow collection pipe 32.

[0076] By dividing the heat exchange body 331 into a flow channel area 3332 and a collection area 3333, and connecting the externally connected collection connection part 332 to the collection area 3333, the function of the original collection fluid can be integrated into the heat exchange body 331, thereby effectively reducing the number of parts and connection interfaces required to construct the heat exchange body 331. Simultaneously, by setting the collection connection part 332 to connect each heat exchange body 331 to the first collection pipe 31 and the second collection pipe 32, both collection pipes can be set as continuously extending complete tubular components, replacing the original segmented structure, thereby further reducing the number of interfaces and improving compatibility with connection tolerances. This effectively reduces the possibility of leakage or connection detachment in the thermal management component 30, thereby improving the overall reliability of the battery device 100, reducing the number of required parts, and lowering processing costs.

[0077] In some optional embodiments, the heat exchange body 331 further includes a sealing member 335, the flow channel having openings on opposite sides in its extension direction, the sealing member 335 being located in the heat exchange cavity 3331 and disposed at the opening, the sealing member 335 being able to close part of the opening of the flow channel.

[0078] Optionally, the heat exchange body 331 may also be provided with a sealing element 335 to limit the number and cross-sectional area of ​​the connected flow channels in the flow channel region 3332. Specifically, the flow channel separator 334 in the heat exchange body 331 divides the heat exchange cavity 3331 into multiple flow channels, which may extend in a straight line, along a broken line, along a curve, or in a serpentine manner. The flow channels have openings on opposite sides in their extension direction for connecting to two collection regions 3333 respectively.

[0079] Based on this, the sealing element 335 is located inside the heat exchange cavity 3331 and is disposed at the aforementioned opening. The sealing element 335 can selectively close the opening of part of the flow channel, thereby flexibly defining the actual flow path of the fluid in the heat exchange cavity 3331 and the cross-sectional area of ​​the path, thereby adjusting the heat exchange efficiency of the thermal management component 30 accordingly.

[0080] For example, by alternately setting the sealing element 335 at both ends of each flow channel, a serpentine flow channel can be formed, thereby adjusting the length of the flow channel. By simultaneously setting the sealing element 335 at both ends of the same flow channel, the flow channel can be closed, thereby adjusting the specific cross-sectional area of ​​the connected flow channels in the same heat exchange body 331 and their proportion in the overall cross-sectional area of ​​the heat exchange body 331.

[0081] By placing the sealing element 335 within the heat exchange cavity 3331 at both ends of the flow channel, the sealing element 335 can also be integrated into the heat exchange body 331, further achieving integration, reducing the number of parts and connections, and lowering the risk of leakage. Simultaneously, by placing the sealing element 335 within the heat exchange cavity 3331, the specific extension direction and cross-sectional area of ​​the flow channel can be flexibly adjusted to improve the practicality of the battery device 100.

[0082] In some alternative embodiments, the plug 335, the flow channel divider 334, and at least a portion of the housing 333 are integrally formed.

[0083] Optionally, in embodiments where a sealing element 335 and a flow channel partition 334 are provided in the heat exchange cavity 3331, the sealing element 335 and the flow channel partition 334 can be integrally formed with at least a portion of the shell 333, for example, by a process such as injection molding.

[0084] For example, to facilitate processing, the shell 333 can be divided into multiple parts and formed separately. A sealing element 335 and a flow channel partition 334 can be selected for one of these parts, and the sealing element 335, the flow channel partition 334, and the portion of the shell 333 to which they are connected can be integrally formed to improve processing efficiency. To facilitate the internal processing of the heat exchange cavity 3331, the shell 333 can be divided into two parts along its thickness direction for processing. The sealing element 335 and the flow channel partition 334 are located on one side of the shell facing the other part and are integrally formed with the portion to which they are connected.

[0085] The one-piece molding process eliminates the connection interfaces between components, thus eliminating the risk of leakage caused by weak welding or bonding. It also simplifies the manufacturing process, improves production efficiency and product consistency, and enhances the structural strength and reliability of the entire heat exchanger body 331.

[0086] Please see Figure 6 , Figure 6 for Figure 5 An enlarged view of region P shown.

[0087] In some optional embodiments, the housing 333 includes a first sub-part 336 and a second sub-part 337. Both the first sub-part 336 and the second sub-part 337 have grooves on their respective sides. The bottom wall of the groove of one of the first sub-parts 336 and the second sub-part 337 is connected to a flow channel separator 334 and a sealing member 335. The first sub-part 336 and the second sub-part 337 are interlocked and connected to each other.

[0088] Optionally, the housing 333 can be a split design including a first sub-part 336 and a second sub-part 337, which are interlocked and connected to form a heat exchange cavity 3331 with good sealing performance inside. Specifically, the first sub-part 336 and the second sub-part 337 are each provided with a groove on their respective surfaces facing each other. When the first sub-part 336 and the second sub-part 337 are interlocked and fixedly connected by welding, bonding or mechanical means, these grooves together constitute the heat exchange cavity 3331. The flow channel separator 334 and the sealing member 335 can be pre-formed on one of the first sub-part 336 or the second sub-part 337, specifically formed on the bottom wall of the groove of one of them.

[0089] It is understandable that after the first sub-part 336 and the second sub-part 337 are engaged, one of them can be at least partially located within the groove of the other. For example, if the first sub-part 336 is partially located within the groove of the second sub-part 337, then the groove of the first sub-part 336 and the portion of the groove of the second sub-part 337 near the bottom wall together constitute the heat exchange cavity 3331. Alternatively, in an embodiment where the first sub-part 336 extends completely into the groove of the second sub-part 337, that is, in which the end face of the first sub-part 336 facing the second sub-part 337 directly abuts against the bottom wall of the groove of the second sub-part 337, the heat exchange cavity 3331 can be entirely formed by the internal space of the groove of the first sub-part 336.

[0090] By adopting a split design for the heat exchanger body 331, the ease of processing and manufacturing of the complex internal flow channel structure (including flow channel separators 334 and sealing components 335) can be effectively improved. By using machining, etching, molding, or injection molding on one side of the groove opening, the structural features in the heat exchanger body 331 can be precisely formed, and then assembled to easily form the required heat exchanger body 331.

[0091] In some optional embodiments, both the first sub-part 336 and the second sub-part 337 are provided with sidewalls 338 extending toward each other, and the sidewalls 338 of the first sub-part 336 and the second sub-part 337 are at least partially stacked and fixedly connected.

[0092] In embodiments where the housing 333 includes a first sub-part 336 and a second sub-part 337, both may have sidewalls 338 extending toward the other, and the sidewalls 338 of both may be at least partially stacked. Specifically, both the first sub-part 336 and the second sub-part 337 have grooves, which are formed by the aforementioned sidewalls 338. The sidewalls 338 of the two sub-parts may extend continuously along the axial direction of the groove and form a ring, or the sidewalls 338 may also have discontinuous notches at certain locations to form openings or other necessary structures communicating with the current collection connection portion 332.

[0093] Based on this, the pattern formed by the sidewalls 338 of the first sub-part 336 and the second sub-part 337 can have the same shape and similar size, so that the sidewall 338 of one of them can be inserted into the pattern formed by the sidewall 338 of the other, and the outer peripheral surface of the sidewall 338 inserted therein should be able to abut against the inner peripheral surface of the sidewall 338 of the other, so that the two are interlocked, and the sidewalls 338 of the two sub-parts are stacked in the thickness direction of the sidewall 338.

[0094] Furthermore, based on the aforementioned structure, the two sub-components can be connected at the position of the stacked sidewalls 338. The connection method can be a fixed connection, such as a welding connection. Connecting the two sub-components at the sidewalls 338 provides a larger connection area, making the connection stable and reliable. Moreover, compared with a simple butt joint, this structure can better withstand the pressure of the internal heat exchange medium and the mechanical stress under various operating conditions, thus improving the reliability of the battery device 100.

[0095] In some alternative embodiments, the sidewall 338 of the first sub-part 336 is bonded to the sidewall 338 of the second sub-part 337, and / or the sidewall 338 of the first sub-part 336 is welded to the sidewall 338 of the second sub-part 337.

[0096] In embodiments where the housing 333 includes two interlocking sub-parts, the two sub-parts can be connected at their sidewalls 338, and depending on the materials of the two sub-parts, they can be bonded or welded. For example, when the first sub-part 336 and the second sub-part 337 are made of PP or PA-based polymer composite materials, the two sub-parts can be bonded together; when the first sub-part 336 and the second sub-part 337 are made of metal or alloy, the two sub-parts can be welded together.

[0097] By connecting the two sub-sections at the sidewall 338 position and using bonding or welding, the connection between the two sub-sections can be made stable and reliable, and the impact of the connection on the heat exchange cavity 3331 between the two sub-sections and on the installation of the subsequent manifold connection 332 can be reduced.

[0098] In some optional embodiments, the sidewalls 338 of the first sub-part 336 and the second sub-part 337 are respectively provided with through holes 339. The through holes 339 of the first sub-part 336 and the through holes 339 of the second sub-part 337 correspond one to one and are arranged facing each other along the axial direction of the through holes 339. The current collection connection part 332 is connected to the through holes 339.

[0099] Optionally, in an embodiment where the first sub-part 336 and the second sub-part 337 are interlocked and the sidewalls 338 are stacked, the sidewalls 338 of the two sub-parts may each be provided with a through hole 339. The through hole 339 is provided through the thickness direction of its own sidewall 338, and the positions of the through holes 339 on the two sub-parts correspond to each other.

[0100] Specifically, the sidewalls 338 of the first sub-part 336 and the second sub-part 337 can each be provided with through holes 339 for connecting the heat exchange chamber 3331 and the flow collector connection part 332, and each sub-part can be provided with two through holes 339, which are respectively used to connect to the first flow collector 31 and the second flow collector 32. The through holes 339 on the first sub-part 336 and the through holes 339 on the second sub-part 337 can be provided in a one-to-one correspondence, and each pair of corresponding through holes 339 can extend in the same direction and be directly opposite each other in the axial direction of the through holes 339.

[0101] For example, in each pair of corresponding through holes 339, the two through holes 339 can have the same shape and size and be arranged facing each other along the axial direction; or, along the aforementioned axial direction, the orthographic projection of one of the two through holes 339 can cover the orthographic projection of the other. This allows for the convenient formation of a passage connecting to the heat exchange cavity 3331, so as to facilitate communication with the flow collection connection part 332.

[0102] By providing through holes 339 on the sidewalls 338 of the first sub-part 336 and the second sub-part 337, the mounting interface of the current collection connection part 332 can be directly integrated into the wall of the housing 333. The structure is compact and no additional adapter is required, which facilitates the installation of the current collection connection part 332 and simplifies the processing steps of the housing 333.

[0103] Please see Figure 7 , Figure 7 This is a partial structural diagram of a thermal management component provided in some embodiments of this application.

[0104] In some optional embodiments, the current collection connection portion 332 is provided with two clamping portions 3321. Along the arrangement direction of the first sub-part 336 and the second sub-part 337, the first sub-part 336 and the second sub-part 337 are clamped between the two clamping portions 3321, and the clamping portions 3321 are connected to the housing 333.

[0105] Optionally, in embodiments where each housing 333 includes a first sub-part 336 and a second sub-part 337, the current collection connection portion 332 can be disposed on a surface of the heat exchange body 331 that is parallel to the arrangement direction of the second sub-part 337, and can partially clamp the first sub-part 336 and the second sub-part 337 inside, thereby improving connection stability and helping to keep the two sub-parts of the housing 333 tightly fitted, thus enhancing the stability of the overall structure.

[0106] Specifically, taking the arrangement of the first sub-part 336 and the second sub-part 337 along the thickness direction of the heat exchange body 331 as an example, the flow collection connection part 332 can be provided with two clamping parts 3321 that are opposite to each other and spaced apart in the thickness direction, and the housing 333 is clamped between the two clamping parts 3321, so that the clamping parts 3321 can press the first sub-part 336 and the second sub-part 337 from opposite sides in the thickness direction.

[0107] Furthermore, the flow collection connection 332 can be connected to the heat exchange body 331 via the clamping part 3321. The specific connection method can be adhesive connection or welding connection, similar to the connection of the first sub-part 336 and the second sub-part 337.

[0108] During connection, the side of the connecting part 312 facing the housing 333 can be connected to the two opposing surfaces of the housing 333 along the thickness direction to form a stable and reliable connection based on clamping. Optionally, the flow collector connecting part 332 can also connect a portion of itself located between the two connecting parts 312 to the side of the heat exchange body parallel to the thickness direction, thereby further improving the connection reliability.

[0109] In some optional embodiments, each heat exchange body 331 is provided with a plurality of flow channel partitions 334, which extend along the length direction of the heat exchange body 331, and each flow channel partition 334 is provided with a sealing member 335 at both opposite ends in the length direction.

[0110] Optionally, the heat exchange body 331 in this embodiment may be provided with multiple flow channel partitions 334, and these flow channel partitions 334 may all extend along the length of the heat exchange body 331 and be arranged parallel to each other. Furthermore, along the arrangement direction of the multiple flow channel partitions 334, the multiple flow channel partitions 334 may be arranged at equal intervals so that the cross-sectional area of ​​each flow channel is the same, facilitating further adjustment of the cross-sectional area of ​​the specific flow channel by means of the sealing member 335.

[0111] Based on this, the flow channel separator 334 can be provided with sealing elements 335 at both ends of the aforementioned length direction, that is, at the junction of the flow channel area 3332 and the two collection areas 3333, to prevent the heat exchange medium from entering the flow channel that is blocked at one end and cannot be connected, thereby improving the uniformity and smoothness of the heat exchange medium flow. At the same time, by providing sealing elements 335 at both ends, "U" shaped, "S" shaped and other flow channels can be easily constructed, making it easy to adjust the flow channel length.

[0112] In some optional embodiments, the sealing members 335 respectively disposed at both ends of the flow channel separator 334 are symmetrically disposed in the length direction of the heat exchange body 331, and in the length direction, the two flow collection areas 3333 are at least partially disposed on opposite sides of the flow channel area 3332.

[0113] Optionally, in the embodiment where both ends of the aforementioned flow channel separator 334 are provided with sealing members 335, the sealing members 335 on both sides can be arranged symmetrically. That is, among the multiple flow channels formed by the flow channel separator 334, only flow channels with both ends closed and flow channels with both ends open and unclosed are included.

[0114] Based on this, the flow channels, which are open at both ends, can be evenly distributed along the arrangement direction of the flow channel separator 334 to ensure the uniformity of heat absorption or release and avoid local overheating or overcooling. Alternatively, the arrangement of the flow channels, which are open at both ends, along the flow channel separator 334 can correspond to the heating conditions of adjacent battery cells 20, so that the distribution density of such flow channels is greater in areas with higher heat generation than in areas with lower heat generation, thereby achieving targeted heat exchange and improving thermal management efficiency.

[0115] In some alternative embodiments, the flow collector connection 332 is connected to at least one of the two opposing surfaces of the heat exchange body 331 in its thickness direction; and / or, the flow collector connection 332 is connected to at least one surface of the heat exchange body 331 parallel to its thickness direction.

[0116] In this embodiment, the heat exchange body 331 integrates the flow collection function within its internal heat exchange cavity 3331. This allows for convenient adjustment of the specific positions of the two flow collection zones 3333 within the heat exchange cavity 3331, and correspondingly adjusts the connection position of the flow collection connection 332. Optionally, the flow collection connection 332 can be connected to multiple different surfaces or positions on the heat exchange body 331.

[0117] For example, in an embodiment where the flow collection areas 3333 are respectively disposed on opposite sides of the flow channel area 3332 along its length, the flow collection connection portion 332 can be disposed in the portion of the flow collection area 3333 that connects to the edge of the heat exchange body 331. This portion can be located on the two opposite side surfaces of the heat exchange body 331 along its length, a portion of the upper and lower surfaces of the heat exchange body 331 near the aforementioned side surfaces, or a portion of the two opposite surfaces of the heat exchange body 331 along its thickness direction near the aforementioned side surfaces. That is, the flow collection connection portion 332 can be disposed on any surface of the heat exchange body 331, as long as there is sufficient space and it can be directly connected to the flow collection area 3333.

[0118] Optionally, when the manifold connection 332 is connected to a narrow surface of the heat exchange body 331, the manifold connection 332 can be connected to the surface and the adjacent surface of the surface at the same time to make the connection stable and reliable.

[0119] In this embodiment, the current collection area 3333 is integrated into the heat exchange cavity 3331. Therefore, based on the corresponding connection with the current collection area 3333, the current collection connection part 332 can be flexibly installed in multiple directions. According to the actual space layout inside the battery pack, the most reasonable and space-saving connection direction can be selected, thereby effectively improving the space utilization and energy density of the battery module.

[0120] In some optional embodiments, in the thickness direction of the heat exchange body 331, the two sides of the flow channel partition 334 abut against the two side walls of the housing 333 respectively, and the included angle between the flow channel partition 334 and the two side walls of the housing 333 in the thickness direction is less than 90°.

[0121] In this embodiment, the heat exchange body 331 has a flow channel separator 334 inside its housing 333 for separating and defining flow channels. Optionally, to distinguish the flow channels from each other, the flow channel separator 334 can abut against the opposite side walls of the housing 333 in the thickness direction of the heat exchange body 331. It is understood that the heat exchange body 331 is at least partially disposed between adjacent battery cells 20, and its thickness direction refers to the arrangement direction of two adjacent battery cells 20.

[0122] Based on this, the flow channel separator 334 can have a certain angle between its two ends in the aforementioned thickness direction and the side wall 338 of the housing 333 that it abuts, the angle being less than 90°, that is, the extension direction of the flow channel separator 334 and the extension direction of the side wall 338 of the housing 333 can be non-perpendicular and have an acute angle.

[0123] By configuring the flow channel separator 334 to extend obliquely relative to the side wall 338 of the housing 333, the housing 333 can be supported while dividing the flow channels. Meanwhile, during the operation of the battery device 100, the battery cells 20 are prone to heat generation and expansion. By configuring the flow channel separator 334 to extend obliquely, the housing 333 can have a certain compression margin in the thickness direction to absorb the expansion of the battery cells 20 and maintain a certain cross-sectional area of ​​the flow channels, thereby improving the applicability and reliability of the thermal management device.

[0124] In some optional embodiments, both the first manifold 31 and the second manifold 32 include a pipe body 311 and a plurality of connecting portions 312 communicating with the pipe body 311. The connecting portions 312 are provided with a plurality of clamps 313 extending in a direction away from the pipe body 311, and the clamps 313 are engaged with the manifold connecting portions 332.

[0125] Optionally, both the first manifold 31 and the second manifold 32 may include a pipe body 311 and a connecting portion 312 disposed on and connected to the pipe body 311. The pipe body 311 may be a tubular member with a cylindrical, rectangular, or polygonal cross-sectional shape. The connecting portion 312 is connected to the inner cavity of the tubular member and is used to connect to the manifold connecting portion 332.

[0126] Specifically, each connecting part 312 may be provided with multiple elastic grippers 313 extending in a direction away from the main body 311, and a connection opening is provided in the central area surrounded by the grippers 313. Optionally, the grippers 313 may be evenly spaced along the circumference of the opening, and each gripper 313 may have the same structure and shape. During installation, the current collection connecting part 332 is partially inserted into the corresponding connection opening, or the tubular structure containing the connection opening is inserted into the current collection connecting part 332. At this time, the elastic grippers 313 open and lock the current collection connecting part 332, thereby achieving quick plug-in and lock-in connections.

[0127] Meanwhile, a sealing element can also be sandwiched between the tubular structure where the connection opening is located and the flow collection connection part 332. For example, a sealing ring can be fitted on the outer surface of the inner one of the two, and the part fitted with the sealing ring can be inserted into the outer one to ensure good sealing.

[0128] By providing a clamp 313 in the connecting part 312, a snap-fit ​​connection can be achieved between the first collector tube 31, the second collector tube 32 and the collector connecting part 332. The snap-fit ​​connection method can simplify the installation process between the collector tube and multiple heat exchange components 33, achieve rapid assembly without tools, facilitate maintenance and has a simple and stable structure, and can improve the production and installation efficiency of the battery device 100.

[0129] Secondly, according to the embodiments of this application, an electrical device is provided, including the battery device 100 in any embodiment of the first aspect, the battery device 100 being used to provide electrical energy.

[0130] The electrical device in this embodiment has all the beneficial effects of the battery device 100 in the first aspect. For details, please refer to the specific description of the battery device 100 in the above embodiments. This embodiment will not repeat the description here.

[0131] This application provides a battery device 100, including a housing 10, battery cells 20, and a thermal management component 30. The housing 10 encloses a receiving cavity 13. Multiple battery cells 20 are disposed in the receiving cavity 13. The thermal management component 30 includes a first current collector 31, a second current collector 32, and multiple heat exchange components 33. At least some of the heat exchange components 33 are disposed between adjacent battery cells 20. Each heat exchange component 33 includes a connected heat exchange body 331 and two current collection connection parts 332. The current collection of each heat exchange component 33... The connecting part 332 is connected to the first manifold 31 and the second manifold 32 respectively; wherein, the heat exchange body 331 includes a shell 333 and a flow channel separator 334. The shell 333 encloses to form a heat exchange cavity 3331. The heat exchange cavity 3331 includes a connected flow channel area 3332 and two manifold areas 3333. The flow channel separator 334 is disposed in the flow channel area 3332 and together with the shell 333, it encloses to form multiple flow channels. The two manifold connecting parts 332 are connected to the two manifold areas 3333 respectively.

[0132] The heat exchange body 331 also includes a sealing member 335. The flow channel has openings on both sides in its extension direction. The sealing member 335 is located in the heat exchange cavity 3331 and is disposed in the opening. The sealing member 335 is configured to close part of the opening of the flow channel. The sealing member 335, the flow channel separator 334 and at least part of the shell 333 are integrally formed.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The box-like structure encloses and forms a receiving cavity; A single battery cell, and multiple battery cells are disposed in the receiving cavity; A thermal management component includes a first manifold, a second manifold, and a plurality of heat exchange components. At least some of the heat exchange components are disposed between adjacent battery cells. Each heat exchange component includes a heat exchange body that is connected to the battery cell and two current collection connection portions. The current collection connection portions of each heat exchange component are respectively connected to the first manifold and the second manifold. The heat exchange body includes a shell and a flow channel separator. The shell encloses a heat exchange cavity, which includes a connected flow channel area and two flow collection areas. The flow channel separator is disposed in the flow channel area and together with the shell encloses multiple flow channels. The two flow collection connection parts are respectively connected to the two flow collection areas.

2. The battery device according to claim 1, characterized in that, The heat exchange body also includes a sealing element. The flow channel has openings on opposite sides in its extension direction. The sealing element is located in the heat exchange cavity and disposed in the opening. The sealing element can close part of the opening of the flow channel.

3. The battery device according to claim 2, characterized in that, The sealing component, the flow channel separator, and at least a portion of the housing are integrally formed.

4. The battery device according to claim 2, characterized in that, The housing includes a first sub-part and a second sub-part. Both the first sub-part and the second sub-part have grooves on their respective sides. The flow channel separator and the sealing member are connected to the bottom wall of the groove of one of the first sub-parts and the second sub-part. The first sub-part and the second sub-part are interlocked and connected to each other.

5. The battery device according to claim 4, characterized in that, Both the first sub-part and the second sub-part are provided with sidewalls extending toward each other, and the sidewalls of the first sub-part and the sidewalls of the second sub-part are at least partially stacked and fixedly connected.

6. The battery device according to claim 5, characterized in that, The sidewall of the first sub-part is bonded to the sidewall of the second sub-part, and / or the sidewall of the first sub-part is welded to the sidewall of the second sub-part.

7. The battery device according to claim 5, characterized in that, The sidewalls of the first sub-part and the second sub-part are respectively provided with through holes. The through holes of the first sub-part and the through holes of the second sub-part correspond one-to-one and are arranged facing each other along the axial direction of the through holes. The current collection connection part is connected to the through holes.

8. The battery device according to claim 4, characterized in that, The current collection connection part is provided with two clamping parts. Along the arrangement direction of the first sub-part and the second sub-part, the first sub-part and the second sub-part are clamped between the two clamping parts, and the clamping parts are connected to the housing.

9. The battery device according to claim 2, characterized in that, Each heat exchanger body is provided with a plurality of flow channel partitions, which extend along the length direction of the heat exchanger body, and each flow channel partition is provided with a sealing member at both opposite ends in the length direction.

10. The battery device according to claim 9, characterized in that, The sealing members, which are respectively disposed at both ends of the flow channel separator, are symmetrically arranged along the length of the heat exchange body. Along the length, the two flow collection zones are at least partially disposed on opposite sides of the flow channel zone.

11. The battery device according to claim 1, characterized in that, The flow collection connection is connected to at least one of the two opposing surfaces of the heat exchange body in the thickness direction. And / or, the flow collector connection is connected to at least one surface of the heat exchange body parallel to its own thickness direction.

12. The battery device according to claim 1, characterized in that, In the thickness direction of the heat exchange body, the two sides of the flow channel partition abut against the two side walls of the shell, and the included angle between the flow channel partition and the two side walls of the shell opposite each other in the thickness direction is less than 90°.

13. The battery device according to claim 1, characterized in that, Both the first manifold and the second manifold include a pipe body and a plurality of connecting portions connected to the pipe body. The connecting portions are provided with a plurality of clamps extending in a direction away from the pipe body, and the clamps are engaged with the manifold connecting portions.

14. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-13, the battery device being used to provide electrical energy.

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