Battery device, energy storage device, and electric device

Abstract

Disclosed are a battery device (100), an energy storage device, and an electric device. The battery device (100) comprises a case (10), a plurality of battery cells (20), and a heat exchange assembly (30). The case (10) is provided with an interface portion (13) communicated with the outside. The plurality of battery cells (20) are arranged in the case (10). The heat exchange assembly (30) is arranged in the case (10), and the heat exchange assembly (30) is configured to exchange heat with the battery cells (20). A medium flow channel (311) is provided inside each heat exchange main body (31), each current collector (32) is connected to at least one end of the corresponding heat exchange main body (31), at least one connector (34) is provided, the connector (34) is connected to the interface portion (13) such that the interface portion (13) is communicated with the current collectors (32) by means of the connector (34), the connector (34) and the interface portion (13) are located on at least one side of each heat exchange main body (31) in a length direction, and connecting members (33) are connected to the current collectors (32) and / or the connector (34).

Description

Battery devices, energy storage devices and electrical appliances

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202510191679.5, filed with the China National Intellectual Property Administration on February 20, 2025, the entire contents of which are incorporated herein by reference as if copied herein. Technical Field

[0003] This application relates to the field of battery technology, specifically to a battery device, an energy storage device, and an electrical device. Background Technology

[0004] With the development of the new energy vehicle industry, battery packs are becoming increasingly compact in their internal structure in pursuit of higher energy density. Currently, the individual battery cells in battery packs are primarily cooled by liquid cooling.

[0005] In related technologies, heat exchange of liquid is mainly achieved by laying pipes inside the battery pack. However, the existing cooling system has a complex structural design, resulting in a slow coolant return speed and thus a relatively poor cooling effect. Summary of the Invention

[0006] In view of the above problems, this application provides a battery device, an energy storage device, and an electrical device that can solve or alleviate the problem of slow coolant return speed in liquid cooling systems.

[0007] In a first aspect, this application provides a battery device. The battery device includes a housing, multiple battery cells, and a heat exchange assembly. The housing has an interface for communicating with the outside. The multiple battery cells are arranged inside the housing. The heat exchange assembly is disposed inside the housing and configured to exchange heat with the battery cells.

[0008] The heat exchange assembly includes a heat exchange body, a collector, a connector, and a joint. The heat exchange body has a medium flow channel inside. The collector is connected to at least one end of the heat exchange body. The joint is configured to be at least one. The joint is connected to an interface portion so that the interface portion communicates with the collector through the joint. The joint and the interface portion are located on at least one side of the length direction of the heat exchange body. The connector connects the collector and / or the joint.

[0009] In the technical solution of this application embodiment, the interface and connector are arranged along the length of the heat exchange body, the heat exchange path is simple and direct, which is conducive to the flow of heat exchange medium and thus can improve heat exchange efficiency.

[0010] In some embodiments, multiple battery cells are arranged along a first direction, or multiple battery cells are arranged perpendicular to a second direction, the first direction being perpendicular to the second direction, and the length direction of the heat exchange body being parallel to the first or second direction.

[0011] In the above technical solution, the arrangement direction of the battery cells and the heat exchange body can be flexibly set.

[0012] In some embodiments, the interface portion is disposed on at least one side wall of the housing along the length direction of the heat exchange body.

[0013] In the above technical solution, the interface is set according to the length direction of the heat exchange body, which can ensure a short heat exchange path and improve heat exchange efficiency. The interface is set on the side wall of the box, making it easy to assemble the interface and the connector.

[0014] In some embodiments, the side of the heat exchange body contacts the side of the battery cell to exchange heat with the battery cell.

[0015] In the above technical solution, heat exchange occurs between the battery cell and the heat exchange body through surface contact, which can improve the heat exchange efficiency between the heat exchange body and the battery cell.

[0016] In some embodiments, the side of the battery cell includes a first side surface, which is the surface with the largest area among the side surfaces of the battery cell, and the side of the heat exchange body is in contact with the first side surface.

[0017] In the above technical solution, the largest surface contact between the heat exchanger body and the battery cell can further improve the heat exchange efficiency between the heat exchanger body and the battery cell.

[0018] In some embodiments, the current collectors are located at both ends or one end of the same heat exchange body.

[0019] In the above technical solution, the position of the current collector can be flexibly configured.

[0020] In some embodiments, the joint includes an inlet joint and an outlet joint, which are located at the same end of the heat exchange body along its length.

[0021] In the above technical solution, the inlet and outlet joints are located at the same end along the length of the heat exchange body, which is beneficial for processing and assembly and improves assembly efficiency.

[0022] In some embodiments, the inlet and outlet joints are located at both ends of the heat exchange body along its length.

[0023] The above technical solutions can simplify the heat exchange path and improve heat exchange efficiency.

[0024] In some embodiments, the connector is detachably connected to the current collector.

[0025] The above technical solution simplifies the structure of the current collector and facilitates the installation and maintenance of the current collector and connectors.

[0026] In some embodiments, the current collector is provided with a connecting pipe, and the connector includes a first connecting part. The first connecting part is provided with a first flow channel. The first flow channel forms two insertion ports at both ends of the first connecting part along the extension direction. The connecting pipes of two adjacent current collectors are respectively inserted into the first flow channel through the two insertion ports.

[0027] In the above technical solution, the current collector can be detachably connected to the connector by plugging in, which is simple to assemble and highly efficient.

[0028] In some embodiments, the connector includes a housing and a sealing layer. The housing includes a first connecting portion, and the sealing layer is disposed on the wall of the first flow channel in the circumferential direction of the first flow channel. The sealing layer seals the connection between the first connecting portion and the connecting pipe.

[0029] In the above technical solution, the sealing layer seals the connection between the first connecting part and the connecting pipe, thereby improving the sealing performance of the connection between the joint and the manifold to a certain extent.

[0030] In some embodiments, the connector includes a second connecting portion connected to the first connecting portion, the second connecting portion having a second flow channel communicating with the first flow channel, and the second connecting portion being connected to the interface portion.

[0031] In the above technical solution, the second flow channel can transport fluid from the interface section to the first flow channel, and transport fluid from the first flow channel to the interface section.

[0032] In some embodiments, the wall of the second flow channel is provided with a sealing layer in the circumferential direction, at least a portion of the interface portion is inserted into the second flow channel, and the sealing layer seals the connection between the second connection portion and the interface portion.

[0033] In the above technical solution, the sealing layer seals the connection between the second connection part and the interface part, thereby improving the sealing performance of the connection between the joint and the interface part to a certain extent.

[0034] In some embodiments, two adjacent current collectors are clamped together to fix the joints.

[0035] In the above technical solution, the clamping and fixing of two adjacent manifolds can improve the reliability of the connection between the manifold and the manifold.

[0036] In some embodiments, the connector and the connecting tube are detachably connected.

[0037] The above technical solution facilitates the installation and disassembly of joints and connecting pipes, and is beneficial for the installation and maintenance of joints and connecting pipes.

[0038] In some embodiments, the connector includes a body and a first connecting portion. The body is connected to the heat exchange body, and the first connecting portion is provided with a first flow channel. The body is connected to the first connecting portion so that the medium flow channel communicates with the first flow channel. The first flow channel forms two insertion ports at both ends of the first connecting portion along the extension direction. Two adjacent connectors are respectively inserted into the first flow channel through the two insertion ports.

[0039] In the above technical solution, the heat exchanger body and the connector are connected by a joint. The connector is detachably connected to the joint by plugging in, which is simple to assemble and highly efficient.

[0040] In some embodiments, the connector includes a housing and a sealing layer. The housing includes a first connecting portion, and the sealing layer is disposed on the wall of the first flow channel in the circumferential direction of the first flow channel. The sealing layer seals the connection between the first connecting portion and the connector.

[0041] In the above technical solution, the sealing layer seals the connection between the first connecting part and the connecting piece, thereby improving the sealing performance of the connection between the joint and the connecting piece to a certain extent.

[0042] In some embodiments, the connector includes a second connecting portion connected to the body, the second connecting portion having a second flow channel communicating with the first flow channel and the medium flow channel, and the second connecting portion being connected to the interface portion.

[0043] In the above technical solution, the second flow channel is connected to the first flow channel and the medium flow channel. Fluid can enter the heat exchange body from the interface section through the second flow channel, through the first flow channel and the medium flow channel, or from the heat exchange body through the medium flow channel, through the first flow channel and the second flow channel to the interface section.

[0044] In some embodiments, the connector includes an inlet connector, which includes a body, a first connecting portion and a second connecting portion. The body has a first sub-channel, which connects the first channel, the second channel and the medium channel of the inlet connector.

[0045] In the above technical solution, fluid can flow from the interface section through the first flow channel, the second flow channel and the first sub-flow channel to the medium flow channel.

[0046] In some embodiments, the connector includes an outlet connector, which includes a body, a first connecting portion and a second connecting portion. The body has a second sub-channel, which connects the first channel, the second channel and the medium channel of the outlet connector.

[0047] In the above technical solution, fluid can flow from the medium flow channel through the first flow channel, the second flow channel, and the second sub-flow channel to the interface section.

[0048] In some embodiments, the inlet connector body and the outlet connector body are integrally formed.

[0049] In the above technical solution, the inlet and outlet connectors are integrally formed by the body, forming a single component, which helps to simplify the assembly process.

[0050] In some embodiments, the battery device further includes an adapter, which includes a first part and a second part connected to each other, the first part being connected to a connector and the second part being connected to an interface portion.

[0051] In the above technical solution, adapters can be used to connect connectors and interfaces at different locations, making the installation of connectors and interfaces more flexible.

[0052] In some embodiments, there is an included angle between the first part and the second part.

[0053] In the above technical solution, the connection direction of the interface can be changed by the adapter, thereby making the installation of the connector and interface more flexible.

[0054] Secondly, this application provides an energy storage device, which includes the battery device of any of the above embodiments.

[0055] Thirdly, this application provides an electrical device, which includes the battery device of any of the above embodiments or the energy storage device of the above embodiments.

[0056] In the energy storage device and electrical device of this application, the interface and joint are arranged along the length of the heat exchange body, the heat exchange path is simple and direct, which is conducive to the flow of heat exchange medium and thus can improve heat exchange efficiency.

[0057] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0058] 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:

[0059] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0060] Figure 2 is an exploded structural diagram of a battery device according to some embodiments of this application;

[0061] Figure 3 is a schematic diagram of the structure of a heat exchange component according to some embodiments of this application;

[0062] Figure 4 is a second schematic diagram of the structure of a heat exchange component according to some embodiments of this application;

[0063] Figure 5 is an exploded structural diagram of a heat exchange component according to some embodiments of this application;

[0064] Figure 6 is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0065] Figure 7 is an enlarged schematic diagram of part a in Figure 6;

[0066] Figure 8 is a second schematic diagram of the structure of a battery device according to some embodiments of this application;

[0067] Figure 9 is an enlarged schematic diagram of part b in Figure 8;

[0068] Figure 10 is a partial structural schematic diagram of a battery device according to some embodiments of this application;

[0069] Figure 11 is an enlarged schematic diagram of part c in Figure 10;

[0070] Figure 12 is a third schematic diagram of the structure of a heat exchange component according to some embodiments of this application;

[0071] Figure 13 is a fourth schematic diagram of the structure of a heat exchange component according to some embodiments of this application;

[0072] Figures 14 to 16 are perspective structural diagrams of connectors according to some embodiments of this application;

[0073] Figure 17 is a right view of a connector according to some embodiments of this application;

[0074] Figure 18 is a cross-sectional view of a connector according to some embodiments of this application.

[0075] The reference numerals in the detailed embodiments are as follows: Vehicle 1000; Battery device 100, controller 200, motor 300; Housing 10, first housing 11, second housing 12, interface 13, inlet interface 131, outlet interface 132; Battery cell 20, first side 21; Heat exchange assembly 30, heat exchange body 31, medium flow channel 311, current collector 32, connector 33, joint 34, inlet joint 341, outlet joint 342, housing 343, sealing layer 344, first connecting part 35, first flow channel 351, insertion port 352, second connecting part 36, second flow channel 361, body 37, first sub-flow channel 371, second sub-flow channel 372, adapter 38, first part 381, second part 382;

[0076] Connecting pipe 40. Detailed Implementation

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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).

[0083] 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.

[0084] 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.

[0085] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0086] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0087] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0088] With the rapid development of new energy technologies, power batteries have gradually become key energy storage devices, deeply integrated into the field of electric transportation, and become the core power source for green travel modes such as electric bicycles, electric motorcycles, and electric vehicles.

[0089] As a key component of new energy technologies, the application scope of power batteries is expanding and market demand is growing.

[0090] With the development of the new energy vehicle industry, battery packs are becoming increasingly compact in their internal structure in pursuit of higher energy density. Currently, the individual battery cells in battery packs are primarily cooled by liquid cooling.

[0091] In related technologies, to ensure the safety of the battery device and prevent coolant leakage, the cooling plate through which the coolant flows is usually placed in contact with the individual battery cells, and the coolant storage device is located outside the battery device. However, in order to connect the coolant circuit of the cooling system, the layout of the cooling system is usually quite complex, resulting in a long flow path and slow return speed of the coolant.

[0092] A longer flow path means the coolant needs more time to absorb heat from the heat source and flow back to the cooling system for dissipation. This increases the coolant's residence time in the system, potentially leading to localized overheating or uneven cooling.

[0093] At the same time, a longer coolant path increases system complexity and manufacturing costs, as well as the risk of coolant leakage.

[0094] Slow backflow rate results in a longer circulation cycle of coolant in the system, reducing the amount of heat removed from the heat source per unit time, thus reducing cooling efficiency.

[0095] Based on the above considerations, in order to solve or alleviate the problem of slow coolant return speed in liquid cooling systems, this application provides a battery device. The battery device includes a housing, multiple battery cells, and a heat exchange assembly. The housing has an interface for communication with the outside. Multiple battery cells are arranged inside the housing. The heat exchange assembly is disposed inside the housing and configured to exchange heat with the battery cells.

[0096] The heat exchange assembly includes a heat exchange body, a collector, a connector, and a joint. The heat exchange body has a medium flow channel inside. The collector is connected to at least one end of the heat exchange body. The connector connects multiple collectors. The joint is configured to be at least one. The joint is connected to an interface portion so that the interface portion communicates with the heat exchange body through the joint. The joint and the interface portion are located on at least one side of the length direction of the heat exchange body.

[0097] In such a battery device, the interface and connector are arranged along the length of the heat exchange body, making the heat exchange path simple and direct, which is conducive to the flow of the heat exchange medium and thus improves the heat exchange efficiency.

[0098] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0099] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0100] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0101] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0102] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0103] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0104] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0105] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0106] 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.

[0107] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0108] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0109] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 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 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0110] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0111] Please refer to Figure 2, which is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a closed space for the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which overlap each other, jointly defining a closed space for accommodating the battery cell 20. The second housing 12 may be a hollow structure with one open end, and the first housing 11 may be a plate-like structure, with the first housing 11 covering or fastening to the open side of the second housing 12, so that the first housing 11 and the second housing 12 jointly define a closed space; alternatively, the first housing 11 and the second housing 12 may both be hollow structures with one open side, with the open side of the first housing 11 covering or fastening to the open side of the second housing 12. Of course, the box 10 formed by the first box 11 and the second box 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0112] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0113] In this embodiment, the battery cell 20 can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment is not limited to these types. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0114] In some embodiments, as shown in FIG1, this application provides a battery device 100. The battery device 100 includes a housing 10, a plurality of battery cells 20, and a heat exchange assembly 30. The housing 10 is provided with an interface 13 communicating with the outside. The plurality of battery cells 20 are arranged inside the housing 10. The heat exchange assembly 30 is disposed inside the housing 10 and is configured to exchange heat with the battery cells 20.

[0115] The heat exchange assembly 30 includes a heat exchange body 31, a collector 32, a connector 33, and a joint 34. The heat exchange body 31 has a medium flow channel 311 inside. The collector 32 is connected to at least one end of the heat exchange body 31. The joint 34 is configured to be at least one. The joint 34 is connected to the interface portion 13 so that the interface portion 13 communicates with the collector 32 through the joint 34. The joint 34 and the interface portion 13 are located on at least one side of the length direction of the heat exchange body 31. The connector 33 connects the collector 32 and / or the joint 34.

[0116] In the technical solution of this application embodiment, the interface part 13 and the connector 34 are arranged along the length direction of the heat exchange body 31, the heat exchange path is simple and direct, which is conducive to the flow of heat exchange medium and thus can improve heat exchange efficiency.

[0117] The enclosure 10 protects and houses the battery cells 20, heat exchange components 30, and other components. The materials of the enclosure 10 include, but are not limited to, metals and composite materials. The shape of the enclosure 10 includes, but is not limited to, regular or irregular shapes such as cuboids.

[0118] Other components of the battery device 100 include, but are not limited to, a high-voltage box, a battery management system, a busbar, and a sampling assembly.

[0119] Optionally, referring to Figure 2, in one embodiment, the box 10 includes a first box 11 and a second box 12. The second box 12 is a hollow structure with one end open, and the first box 11 is a plate-like structure. The first box 11 covers or fastens to the open side of the second box 12 so that the first box 11 and the second box 12 together define a closed space.

[0120] A single battery cell 20 can be the smallest unit for storing electrical energy, and multiple battery cells 20 can be electrically connected in series, parallel, or mixed connection. Mixed connection can refer to multiple battery cells 20 being connected in both series and parallel.

[0121] Optionally, the bottom surface of the battery cell 20 can be connected to the bottom wall of the housing 10 with insulating adhesive to fix the battery cell 20.

[0122] The heat exchange assembly 30 is disposed inside the housing 10 and is used to exchange heat with the battery cell 20 to keep the battery cell 20 within a suitable operating temperature range.

[0123] Furthermore, the housing 10 can protect and house the heat exchange assembly 30. The heat exchange assembly 30 can exchange heat with the battery cell 20, allowing the battery cell 20 to operate within its normal temperature range.

[0124] The heat exchange body 31 has a medium flow channel 311 inside, through which heat exchange fluid can be introduced. The fluid can exchange heat with the battery cell 20 through the heat exchange body 31, thereby heating or cooling the battery cell 20.

[0125] The heat exchanger body 31 may have one or more medium flow channels 311. When the heat exchanger body 31 has one medium flow channel 311, the structure of the heat exchanger body 31 can be simplified, which is conducive to the flow of fluid in it. At the same time, it can also make the heat exchanger body 31 easier to process.

[0126] When the heat exchange body 31 has multiple medium flow channels 311, the multiple medium flow channels 311 can increase the heat exchange area between the fluid and the battery cell 20, thereby improving the heat exchange efficiency between the fluid and the battery cell 20 to a certain extent.

[0127] The shape of the medium flow channel 311 includes, but is not limited to, a meandering shape, a straight shape, etc. Optionally, the straight medium flow channel 311 can extend along the length direction of the heat exchange body 31, and multiple straight medium flow channels 311 are arranged parallel to each other.

[0128] The heat exchanger body 31 is disposed between two adjacent battery cells 20 so that the heat exchanger body 31 can contact the two adjacent battery cells 20.

[0129] In this way, one heat exchanger 31 can exchange heat with two adjacent battery cells 20 at the same time, which can reduce the number of heat exchangers 31, thereby simplifying the structure of the battery device 100, making the overall volume of the battery device 100 smaller, and which is conducive to improving the energy density of the battery device 100.

[0130] Furthermore, the heat exchange body 31 physically separates two adjacent battery cells 20. In the event of thermal runaway in one of the battery cells 20, it can prevent the thermal runaway from spreading to the other adjacent battery cell 20 to a certain extent, thereby improving the reliability of the battery device 100.

[0131] Heat exchange fluids include, but are not limited to, water, ethylene glycol and mixtures thereof (such as ethylene glycol-water mixtures).

[0132] The current collector 32 is connected to at least one end of the heat exchange body 31. Optionally, in one embodiment, the battery cell 20 is cuboid in shape, and the heat exchange body is cuboid in shape adapted to the shape of the battery cell 20. The current collector 32 may be connected to at least one end of the heat exchange body 31 along its length.

[0133] In one embodiment, the current collector 32 is connected to one end of the heat exchange body 31.

[0134] In one embodiment, two current collectors 32 are respectively connected to the two ends of the heat exchange body 31.

[0135] The collector 32 is connected to the medium flow channel 311, thereby allowing fluid to flow from the collector 32 into the medium flow channel 311 and vice versa. The collector 32 has a collection channel inside that is connected to the medium flow channel 311, which can be used to divide and merge the fluid.

[0136] During the diversion, the fluid flows from the interface 13 into the connector 34. The collector 32 can divert the fluid flowing from the connector 33 or the connector 34 into the collector 32 through the collector channel to the same or different medium channels 311 inside the heat exchange body 31, so that fluid flows into the medium channel 311 to exchange heat with the battery cell 20.

[0137] During the convergence, the collector 32 can guide the heat-exchanged fluid to the connector 33 or joint 34 through the collection channel, so that the fluid can flow back to the interface 13 and form a fluid circulation flow.

[0138] The connector 33 can connect the collector 32 and / or the connector 34. The connector 33 is used to connect two adjacent media channels 311. Specifically, in one embodiment, a connector 33 can connect two adjacent collectors 32, which are connected to the media channels 311 of a heat exchanger body 31. Fluid can flow from one collector 32 to an adjacent collector 32 through the connector 33, thereby connecting two adjacent media channels 311.

[0139] In one embodiment, a connector 33 can connect an adjacent joint 34 and a collector 32, respectively. The joint 34 and the collector 32 are respectively connected to the medium flow channels 311 of two heat exchange bodies 31. Fluid can flow from the joint 34 into the adjacent collector 32 through the connector 33, or fluid can flow from the collector 32 into the adjacent joint 34 through the connector 33, thereby connecting the two adjacent medium flow channels 311. The connector 33 may include, but is not limited to, a straight pipe.

[0140] The connector 34 is connected to the interface portion 13 so that the interface portion 13 is in communication with the collector 32 through the connector 34. Optionally, in one embodiment, the collector 32 is connected to the heat exchange body 31, and the interface connects two adjacent collectors 32, thereby connecting two adjacent medium flow channels 311.

[0141] Optionally, the connector 34 is configured as a single connector 34, which connects the collector 32 and the interface 13, thereby enabling fluid to flow into the connector 34 through the interface 13 and then into the collector 32, and / or enabling fluid to flow out of the collector 32 and then into the interface 13 through the connector 34.

[0142] Optionally, multiple connectors 34 are configured, each connector 34 connecting a corresponding collector 32 and interface 13, thereby enabling fluid to flow from interface 13 into collector 32 through connector 34, and from collector 32 into interface 13 through connector 34.

[0143] Optionally, in one embodiment, the interface is directly connected to the heat exchange body 31 and connected to two adjacent medium flow channels 311 via connectors 33. Optionally, the connector 34 is configured as a single connector, with a single connector 34 connected to one heat exchange body 31, while other heat exchange bodies 31 are connected to the collectors 32. The connector 34 is connected to adjacent collectors 32 via two connectors 33, thereby enabling fluid to flow into the connector 34 through the interface section 13 and then into the collectors 32 and the medium flow channels 311, and / or enabling fluid to flow out of the collectors 32 and the medium flow channels 311 and then into the interface section 13 through the connector 34.

[0144] Optionally, multiple connectors 34 are configured, each connector 34 is connected to a heat exchange body 31 and an interface section 13, and the connectors 34 are connected to each other through connectors 33, so that fluid can flow from the interface section 13 into the corresponding medium flow channel 311 through the connectors 34 and connectors 33, and from the medium flow channel 311 into the interface section 13 through connectors 33 and connectors 34.

[0145] Optionally, there may be multiple interface sections 13, with one interface section 13 connecting one or more connectors 34. Alternatively, there may be a single interface section 13, with a single interface section 13 connecting all connectors 34.

[0146] The connector 34 and the interface portion 13 are located on at least one side of the heat exchange body 31 along its length. Optionally, in one embodiment, the connector 34 and the interface portion 13 are located on one side of the heat exchange body 31 along its length, wherein the number of connectors 34 and interface portions 13 can be one or more. In this way, the external fluid pipeline is arranged on one side of the housing 10, which facilitates the arrangement and installation.

[0147] Optionally, in one embodiment, the connector 34 and the interface portion 13 are located on both sides of the heat exchange body 31 along its length, wherein the number of connectors 34 and interface portions 13 can be one or more. In this way, the fluid inlet and outlet can be placed on both sides of the battery device 100, or two heat exchange paths can be provided respectively, thereby improving heat exchange efficiency.

[0148] In summary, in the battery device 100 of this application, the fluid used for heat exchange can enter the current collector 32 and the connector 33 through the interface 13 and the connector 34, and the current collector 32 and the connector 33 can distribute the fluid to each heat exchange body 31 and collect the fluid flowing out of each heat exchange body 31 to the connector 34, thereby realizing the heat exchange between the battery cell 20 and the fluid using the heat exchange body 31.

[0149] Furthermore, the connector 34 and the interface 13 are located on at least one side of the heat exchange body 31 along its length, which can simplify the flow channel structure and thus improve problems such as long backflow distance and excessive flow resistance in the flow channel.

[0150] In some embodiments, a plurality of battery cells 20 are arranged along a first direction, or a plurality of battery cells 20 are arranged perpendicular to a second direction, wherein the first direction is perpendicular to the second direction and the length direction of the heat exchange body 31 is parallel to the first direction or the second direction.

[0151] In the above technical solution, the arrangement direction of the battery cell 20 and the heat exchange body 31 can be flexibly set.

[0152] Specifically, as shown in Figure 2, a plurality of battery cells 20 can be arranged along a first direction to form a battery module, and multiple battery modules can be arranged within the housing 10 along the first direction and / or a second direction, wherein the first direction and the second direction are perpendicular to each other. In one embodiment, the first direction can be the front-rear direction of the vehicle 1000, and the second direction can be the left-right direction of the vehicle 1000. In another embodiment, the first direction can be the left-right direction of the vehicle 1000, and the second direction can be the front-rear direction of the vehicle 1000.

[0153] The length direction of the heat exchanger body 31 is parallel to either the first or the second direction. That is, the length direction of the heat exchanger body 31 can be arranged along the front-rear direction of the vehicle 1000, or it can be arranged along the left-right direction of the vehicle 1000. This allows for flexible arrangement of the battery cell 20 and the heat exchanger body 31 according to actual needs. In the embodiment shown in Figure 6, the length direction of the heat exchanger body 31 is arranged along the left-right direction of the vehicle 1000.

[0154] In some embodiments, the interface portion 13 is disposed on at least one side wall of the housing 10 along the length direction of the heat exchange body 31.

[0155] In the above technical solution, the interface part 13 is set according to the length direction of the heat exchange body 31, which can ensure a short heat exchange path and improve heat exchange efficiency. The interface part 13 is set on the side wall of the box 10, so that the interface part 13 and the connector 34 are easy to assemble.

[0156] Specifically, the side walls of the housing 10 include two side walls along the front-rear direction of the vehicle 1000, and two side walls along the left-right direction of the vehicle 1000.

[0157] Optionally, when the heat exchange body 31 is arranged along the longitudinal direction of the vehicle 1000, the interface portion 13 may be provided on one of the two side walls of the housing 10 along the longitudinal direction of the vehicle 1000. Alternatively, when the heat exchange body 31 is arranged along the longitudinal direction of the vehicle 1000, the interface portion 13 may be provided on both side walls of the housing 10 along the longitudinal direction of the vehicle 1000.

[0158] Optionally, when the heat exchanger body 31 is arranged along the left-right direction of the vehicle 1000 in its longitudinal direction, the interface portion 13 may be provided on one of the two side walls of the housing 10 along the left-right direction of the vehicle 1000. Alternatively, when the heat exchanger body 31 is arranged along the left-right direction of the vehicle 1000 in its longitudinal direction, the interface portion 13 may be provided on both side walls of the housing 10 along the left-right direction of the vehicle 1000.

[0159] In some embodiments, the side of the heat exchange body 31 contacts the side of the battery cell 20 to exchange heat with the battery cell 20.

[0160] In the above technical solution, the battery cell 20 and the heat exchange body 31 exchange heat through surface contact, which can improve the heat exchange efficiency between the heat exchange body 31 and the battery cell 20.

[0161] Specifically, the battery cell 20 may include a housing and an electrode assembly, the electrode assembly being disposed within the housing, and the housing having electrode terminals electrically connected to the electrode assembly. The side of the heat exchange body 31 may contact the side of the housing.

[0162] Optionally, in one embodiment, the outer casing is rectangular, and the heat exchange body 31 is also rectangular to match the shape of the outer casing. The sides of the heat exchange body 31 contact the sides of the outer casing, allowing the battery cell 20 to exchange heat with the fluid through the outer casing and the heat exchange body 31. The large contact area between the sides facilitates rapid heat transfer, which is beneficial for improving the heat exchange efficiency between the heat exchange body 31 and the battery cell 20.

[0163] The heat exchanger body 31 may be made of materials including, but not limited to, metal, and the casing of the battery cell 20 may also be made of materials including, but not limited to, metal. The materials of the heat exchanger body 31 and the casing of the battery cell 20 may be the same or different.

[0164] In some embodiments, the side of the battery cell 20 includes a first side surface 21, which is the surface with the largest area among the side surfaces of the battery cell 20, and the side of the heat exchange body 31 is in contact with the first side surface 21.

[0165] In the above technical solution, the largest surface contact between the heat exchange body 31 and the side of the battery cell 20 can further improve the heat exchange efficiency between the heat exchange body 31 and the battery cell 20.

[0166] Optionally, in one embodiment, the battery cell 20 can be a prismatic battery cell 20. The outer casing of the battery cell 20 is rectangular. The first side surface 21 is the surface with the largest area among the side surfaces of the outer casing, also known as the large surface. The first side surface 21 has the largest area and accumulates the most heat from the battery cell 20. The side surface of the heat exchange body 31 is in contact with the first side surface 21, so that more heat can be transferred to the heat exchange body 31 in a timely manner and exchanged with the fluid inside the heat exchange body 31, thereby further improving the heat exchange efficiency between the heat exchange body 31 and the battery cell 20.

[0167] Optionally, in one embodiment, referring to Figures 2 and 3, two sides of a heat exchange body 31 along the arrangement direction of multiple battery cells 20 (the front-back direction as shown in the figure) respectively contact the first side 21 of two adjacent battery cells 20, so that the same heat exchange body 31 can exchange heat with two adjacent battery cells 20 at the same time, which is beneficial to improving the heat exchange efficiency between the heat exchange body 31 and the battery cells 20.

[0168] In some embodiments, the current collector 32 is located at both ends or one end of the same heat exchange body 31.

[0169] In the above technical solution, the position of the current collector 32 can be flexibly configured.

[0170] Specifically, the position of the collector 32 can be configured according to factors including but not limited to the space configuration, size, customer requirements, heat exchange performance, etc. within the housing 10.

[0171] Optionally, in one embodiment, referring to Figure 3, the collectors 32 are located at both ends of the same heat exchange body 31. In one embodiment, the length direction of the heat exchange body 31 is the left-right direction of the vehicle 1000, the collectors 32 are located at the left and right ends of the heat exchange body 31, the interface portion 13 is located on the left and right side walls of the housing 10, and the connector 34 is connected to the interface portion 13, so that fluid can flow from the collector 32 through the connector 34 to the interface portion 13, and fluid can flow from the interface portion 13 through the connector 34 to the collector 32. Of the two collectors 32 at both ends of the same heat exchange body 31, one collector 32 can be used as the fluid inflow collector 32, and the other collector 32 can be used as the fluid outflow collector 32.

[0172] Optionally, in one embodiment, a connector 33 connects two collectors 32 on the same end of two adjacent heat exchange bodies 31. The connector 33 allows fluid to flow between two adjacent collectors 32. Optionally, in one embodiment, collectors 32 and connectors 34 are respectively connected to the same end of two adjacent heat exchange bodies 31, and the connector 33 connects the collectors 32 and connectors 34 respectively. In this way, the connector 33 allows fluid to flow from connector 34 into the adjacent collector 32, or from collector 32 to connector 34.

[0173] Optionally, in one embodiment, referring to Figures 4 and 5, the collector 32 is located at one end of the same heat exchange body 31 along its length. In one embodiment, the length direction of the heat exchange body 31 is the left-right direction of the vehicle 1000, the collector 32 is located at the left or right end of the heat exchange body 31, the interface 13 is located on the left or right side wall of the housing 10, and the connector 34 is connected to the interface 13, thereby allowing fluid to flow from the heat exchange body 31 through the connector 34 to the interface 13, and from the interface 13 through the connector 34 to the heat exchange body 31. Two connectors 33 can connect two collectors 32 on the same end of two adjacent heat exchange bodies 31. One connector 33 can serve as a connector for fluid inflow into the collector 32 or the connector 34, and the other connector 33 can serve as a connector for fluid outflow from the collector 32 or the connector 34.

[0174] In some embodiments, the connector 34 includes an inlet connector 341 and an outlet connector 342, which are located at the same end of the heat exchange body 31 along its length.

[0175] In the above technical solution, the inlet connector 341 and the outlet connector 342 are located at the same end of the heat exchange body 31 along the length direction, which is beneficial for processing and assembly and improves assembly efficiency.

[0176] It should be noted that Figure 4 only shows one connector 34 located at one end of the heat exchanger body 31 along its length; the other connector 34 is not shown. It is understood that the two connectors 34 can be connected to the same end of the same heat exchanger body 31, or to the same end of different heat exchanger bodies 31. For example, inlet connector 341 and outlet connector 342 can both be connected to the left end of the same heat exchanger body 31. Alternatively, inlet connector 341 can be connected to the left end of one heat exchanger body 31, and outlet connector 342 can be connected to the left end of another heat exchanger body 31.

[0177] The interface section 13 includes an inlet interface section 131 and an outlet interface section 132. The inlet interface section 131 is connected to the inlet connector 341, and the outlet interface section 132 is connected to the outlet connector 342. The inlet interface section 131 is used to introduce fluid into the inlet connector 341, so that the fluid can flow through the collector 32 and the connector 33 to different heat exchange bodies 31, thereby exchanging heat with the battery cell 20.

[0178] The outlet section 132 is used to receive the fluid flowing out of the outlet connector 342, so that the fluid can flow to the temperature control unit through the outlet connector 342 and the outlet section 132. The temperature control unit can cool and heat the fluid, and the cooled or heated fluid flows back into the heat exchange body 31 through the inlet section 131, the inlet connector 341, the collector 32 and the connector 33.

[0179] Optionally, the inlet connector 341 and the outlet connector 342 are respectively connected to the two ends of the heat exchange body 31 along its length.

[0180] Optionally, the inlet connector 341 and outlet connector 342 can therefore be connected to two connectors 34 and two interface parts 13 at one end of the heat exchange body 31 along the length direction, which is beneficial to improving the overall assembly efficiency of the connectors 34 and interface parts 13.

[0181] In some embodiments, the connector 34 is detachably connected to the current collector 32.

[0182] The above technical solution simplifies the structure of the current collector 32, which facilitates the installation and maintenance of the current collector 32 and the connector 34.

[0183] Specifically, the connector 34 and the collector 32 are detachably connected. The connector 34 and the collector 32 can be separate components, manufactured separately and then assembled together. This simplifies the structure of the collector 32, reduces its manufacturing difficulty and cost to some extent, and also improves problems such as backflow and excessive flow resistance in the flow channel.

[0184] Detachable connection methods include, but are not limited to, bolt connection, snap connection, plug connection, clamping, etc.

[0185] In some embodiments, the current collector 32 is provided with a connecting pipe 40, and the connector 34 includes a first connecting portion 35. The first connecting portion 35 is provided with a first flow channel 351. The first flow channel 351 forms two insertion ports 352 at both ends of the first connecting portion 35 along the extension direction. The connecting pipes 40 of two adjacent current collectors 32 are respectively inserted into the first flow channel 351 through the two insertion ports 352.

[0186] In the above technical solution, the current collector 32 can be detachably connected to the connector 34 by plugging in, which is simple to assemble and highly efficient.

[0187] Optionally, in one embodiment, referring to Figures 14 to 16, the first connecting portion 35 is provided with a first flow channel 351, and at least a portion of the connecting tube 40 is inserted into the first flow channel 351. The connecting tube 40 may be completely inserted into the first flow channel 351 or partially inserted into the first flow channel 351. After the connecting tube 40 is inserted into the first flow channel 351, the first connecting portion 35 can clamp the connecting tube 40.

[0188] The shape of the first flow channel 351 is adapted to the shape of the connecting pipe 40, making the connection between the connecting pipe 40 and the first connecting part 35 tighter, and improving the sealing performance of the connecting pipe 40 and the first connecting part 35 to a certain extent, preventing fluid leakage. In the figure, the shape of the first flow channel 351 and the shape of the connecting pipe 40 are both cylindrical.

[0189] During assembly, the connecting pipe 40 can be aligned with the first flow channel 351 and inserted into the first flow channel 351, thereby completing the assembly of the collector 32 and the connector 34.

[0190] Optionally, in one embodiment, the connecting pipe 40 is provided with a first flow channel 351, and at least a portion of the first connecting part 35 is inserted into the first flow channel 351.

[0191] In some embodiments, the connector 34 includes a housing 343 and a sealing layer 344. The housing 343 includes a first connecting portion 35. The sealing layer 344 is disposed on the wall surface of the first flow channel 351 in the circumferential direction of the first flow channel 351. The sealing layer 344 seals the connection between the first connecting portion 35 and the connecting pipe 40.

[0192] In the above technical solution, the sealing layer 344 seals the connection between the first connecting part 35 and the connecting pipe 40, thereby improving the sealing performance of the connection between the joint 34 and the collector 32 to a certain extent.

[0193] Optionally, in one embodiment, referring to Figures 14 and 16, the first connecting portion 35 is provided with a first flow channel 351, and at least a portion of the connecting portion is inserted into the first flow channel 351. The material of the housing 343 includes, but is not limited to, polydodecanoic acid (PA), and the material of the sealing layer 344 includes, but is not limited to, thermoplastic elastomer (TPS). The outer housing 343 has a high hardness, which can play a protective and wear-resistant role, and the housing 343 has a certain toughness and strength. The inner sealing layer 344 is softer and can play a sealing role, which can prevent fluid leakage between the connector 34 and the collector 32 to a certain extent.

[0194] A sealing layer 344 is disposed on the wall surface of the first flow channel 351 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the first flow channel 351 in the circumferential direction. Optionally, the outer diameter of the connecting pipe 40 is larger than the inner diameter of the sealing layer 344. After the connecting pipe 40 is inserted into the first flow channel 351, the sealing layer 344 can undergo elastic deformation and be sandwiched between the outer circumferential surface of the connecting pipe 40 and the wall surface of the first flow channel 351. The sealing layer 344 can tightly fit the connecting pipe 40, thereby sealing the connection between the first connecting part 35 and the connecting pipe 40.

[0195] Optionally, in one embodiment, the connecting pipe 40 is provided with a first flow channel 351, and at least a portion of the first connecting part 35 is inserted into the first flow channel 351. After the first connecting part 35 is inserted into the first flow channel 351, the sealing layer 344 can be sandwiched between the outer peripheral surface of the first connecting part 35 and the wall surface of the first flow channel 351, thereby sealing the connection between the first connecting part 35 and the connecting pipe 40.

[0196] In some embodiments, the connector 34 includes a second connecting portion 36 connected to the first connecting portion 35. The second connecting portion 36 is provided with a second flow channel 361, which communicates with the first flow channel 351. The second connecting portion 36 is connected to the interface portion 13.

[0197] In the above technical solution, the second flow channel 361 can transport fluid from the interface section 13 to the first flow channel 351, and transport fluid from the first flow channel 351 to the interface section 13.

[0198] In one embodiment, referring to Figures 14 to 16, the second connecting portion 36 is connected to the outer peripheral surface of the first connecting portion 35, so that the connector 34 forms a three-way pipe configuration. The second connecting portion 36 is connected to the interface portion 13. When fluid flows in, the second flow channel 361 can transport the fluid flowing in from the interface portion 13 to the first flow channel 351, and then the fluid is diverted to two adjacent collectors 32 by the first flow channel 351. The two adjacent collectors 32 then transport the fluid to the heat exchange body 31 and to the next collector 32 via the connector 33. When fluid flows out, the first flow channel 351 can collect the fluid flowing out from the two adjacent collectors 32 and transport it to the second flow channel 361. The second flow channel 361 transports the fluid flowing out from the first flow channel 351 to the interface portion 13.

[0199] In some embodiments, the wall of the second flow channel 361 is provided with a sealing layer 344 in the circumferential direction, at least a portion of the interface portion 13 is inserted into the second flow channel 361, and the sealing layer 344 seals the connection between the second connection portion 36 and the interface portion 13.

[0200] In the above technical solution, the sealing layer 344 seals the connection between the second connecting part 36 and the interface part 13, thereby improving the sealing performance of the connection between the connector 34 and the interface part 13 to a certain extent.

[0201] The inner sealing layer 344 can play a sealing role, which can prevent fluid from leaking between the connector 34 and the interface 13 to a certain extent.

[0202] A sealing layer 344 is disposed on the wall surface of the second flow channel 361 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the second flow channel 361 in the circumferential direction. Optionally, the outer diameter of the interface portion 13 is larger than the inner diameter of the ring of sealing layer 344. After the interface portion 13 is inserted into the second flow channel 361, the sealing layer 344 can be sandwiched between the outer peripheral surface of the interface portion 13 and the wall surface of the second flow channel 361, and the sealing layer 344 can be tightly fitted onto the interface portion 13, thereby sealing the connection between the second connecting portion 36 and the interface portion 13.

[0203] According to some embodiments of this application, optionally, referring to Figures 14 and 16, the sealing layer 344 is interference-fitted with the connecting pipe 40 and the interface portion 13. This can improve the sealing performance of the connection between the connector 34 and the manifold 32, as well as between the connector 34 and the interface portion 13, to a certain extent.

[0204] According to some embodiments of this application, optionally, the sealing layer 344 and the housing 343 are manufactured using a two-color injection molding process. Thus, manufacturing the sealing layer 344 and the housing 343 using a two-color injection molding process can, to some extent, improve the manufacturing efficiency of the connector 34 and reduce costs.

[0205] In some embodiments, two adjacent current collectors 32 clamp and fix the connector 34.

[0206] In the above technical solution, the clamping and fixing of the two adjacent collectors 32 to the connector 34 can improve the reliability of the connection between the connector 34 and the collector 32.

[0207] In one embodiment, referring to Figure 3, the heat exchange body 31 has collectors 32 at both ends along its length. The connector 34 may include an inlet connector 341 and an outlet connector 342. The extension direction of the heat exchange body 31 is the left-right direction of the vehicle 1000. The connector 34 at the left end of the heat exchange body 31 may be either an inlet connector 341 or an outlet connector 342, while the connector 34 at the right end of the heat exchange body 31 may be either an outlet connector 342 or an inlet connector 341. The connector 34 at the left end of the heat exchange body 31 is clamped and fixed by two adjacent collectors 32 at the left end, and the connector 34 at the right end of the heat exchange body 31 is clamped and fixed by two adjacent collectors 32 at the right end.

[0208] In one embodiment, referring to Figure 4, a collector 32 is provided at one end (e.g., the left or right end) along the length of the heat exchange body 31. The connector 34 may include an inlet connector 341 and an outlet connector 342. The extension direction of the heat exchange body 31 is the left-right direction of the vehicle 1000. The inlet connector 341 and the outlet connector 342 at the left or right end of the heat exchange body 31 are clamped and fixed by two adjacent collectors 32 at the left or right end.

[0209] In some embodiments, referring to Figures 8 to 11, the connector 34 is detachably connected to the connecting tube 40.

[0210] The above technical solution facilitates the installation and disassembly of the connector 34 and the connecting pipe 40, and is beneficial for the installation and maintenance of the connector 34 and the connecting pipe 40.

[0211] Specifically, the connector 34 and the connecting pipe 40 are detachably connected. The connector 34 and the connecting pipe 40 can be separate parts, manufactured separately and then assembled together. This facilitates the installation and disassembly of the connector 34 and the connecting pipe 40.

[0212] Detachable connection methods include, but are not limited to, bolt connection, snap connection, plug connection, clamping, etc.

[0213] In some embodiments, referring to Figures 12 and 13, the connector 34 includes a body 37 and a first connecting portion 35. The body 37 is connected to the heat exchange body 31. The first connecting portion 35 is provided with a first flow channel 351. The body 37 is connected to the first connecting portion 35 so that the medium flow channel 311 communicates with the first flow channel 351. The first flow channel 351 has two insertion ports 352 formed at both ends of the first connecting portion 35 along the extension direction. Two adjacent connectors 33 are respectively inserted into the first flow channel 351 through the two insertion ports 352.

[0214] In the above technical solution, the heat exchange body 31 and the connector 33 are connected by the connector 34. The connector 33 is detachably connected to the connector 34 by plugging in, which is simple to assemble and highly efficient.

[0215] Specifically, the body 37 is connected to the heat exchange body 31, and the first connecting part 35 is connected to the heat exchange body 31 so that the first flow channel 351 is connected to the medium flow channel 311, thereby allowing the fluid to enter the heat exchange body 31 through the first connecting part 35 and the body 37, or enter the first connecting part 35 through the heat exchange body 31 and the body 37.

[0216] Optionally, in one embodiment, referring to Figures 17 and 18, the first connecting portion 35 is provided with a first flow channel 351, and at least a portion of the connector 33 is inserted into the first flow channel 351. The connector 33 may be completely inserted into the first flow channel 351 or partially inserted into the first flow channel 351. After the connector 33 is inserted into the first flow channel 351, the first connecting portion 35 can clamp the connector 33.

[0217] The shape of the first flow channel 351 is adapted to the shape of the connector 33, making the connection between the connector 33 and the first connecting part 35 tighter, and improving the sealing performance of the connector 33 and the first connecting part 35 to a certain extent, preventing fluid leakage. In the illustrated embodiment, both the shape of the first flow channel 351 and the shape of the connector 33 are cylindrical.

[0218] During assembly, the connector 33 can be aligned with the first flow channel 351 and inserted into the first flow channel 351, thereby completing the assembly of the connector 34 and the connector 33.

[0219] In some embodiments, the connector 34 includes a housing 343 and a sealing layer 344. The housing 343 includes a first connecting portion 35. The sealing layer 344 is disposed on the wall surface of the first flow channel 351 in the circumferential direction of the first flow channel 351. The sealing layer 344 seals the connection between the first connecting portion 35 and the connector 33.

[0220] In the above technical solution, the sealing layer 344 seals the connection between the first connecting part 35 and the connector 33, thereby improving the sealing performance of the connection between the joint 34 and the connector 33 to a certain extent.

[0221] Specifically, optionally, in one embodiment, the first connecting portion 35 is provided with a first flow channel 351, and at least a portion of the connector 33 is inserted into the first flow channel 351.

[0222] The material of the housing 343 includes, but is not limited to, polydodecanoic acid (PA), and the material of the sealing layer 344 includes, but is not limited to, thermoplastic elastomer (TPS). The outer housing 343 has a relatively high hardness, which can play a protective and wear-resistant role, and the housing 343 has a certain degree of toughness and strength. The inner sealing layer 344 is relatively soft and can play a sealing role, preventing fluid leakage between the joint 34 and the connector 33 to a certain extent.

[0223] A sealing layer 344 is disposed on the wall surface of the first flow channel 351 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the first flow channel 351 in the circumferential direction. Optionally, the outer diameter of the connector 33 is larger than the inner diameter of the sealing layer 344. After the connector 33 is inserted into the first flow channel 351, the sealing layer 344 can undergo elastic deformation and be sandwiched between the outer circumferential surface of the connector 33 and the wall surface of the first flow channel 351. The sealing layer 344 can tightly fit the connector 33, thereby sealing the connection between the first connecting part 35 and the connector 33.

[0224] In some embodiments, referring to FIG18, the connector 34 includes a second connection portion 36 connected to the body 37. The second connection portion 36 is provided with a second flow channel 361, which communicates with the first flow channel 351 and the medium flow channel 311. The second connection portion 36 is connected to the interface portion 13.

[0225] In the above technical solution, the second flow channel 361 is connected to the first flow channel 351 and the medium flow channel 311. Fluid can enter the heat exchange body 31 from the interface 13 through the second flow channel 361, through the first flow channel 351 and the medium flow channel 311, or from the heat exchange body 31 through the medium flow channel 311, through the first flow channel 351 and the second flow channel 361, into the interface 13.

[0226] The second connecting portion 36 is connected to the outer peripheral surface of the first connecting portion 35 and / or the body 37. Optionally, the second connecting portion 36 can be connected to the body 37 alone, thereby allowing the second flow channel 361 and the first flow channel 351 to communicate with the medium flow channel 311 through the body 37. Optionally, the second connecting portion 36 can be connected to the first connecting portion 35 alone, thereby allowing the second flow channel 361 to communicate with the medium flow channel 311 through the first flow channel 351. Optionally, the second connecting portion 36 can be connected to both the first connecting portion 35 and the body 37 simultaneously, thereby allowing the first flow channel 351, the second flow channel 361, and the medium flow channel 311 to communicate simultaneously.

[0227] In one embodiment, referring to FIG18, the second connecting portion 36 is connected to both the first connecting portion 35 and the body 37, so that the connector 34 forms a three-way pipe configuration. The second connecting portion 36 is connected to the interface portion 13. When fluid flows in, the second flow channel 361 can transport the fluid flowing in from the interface portion 13 to the first flow channel 351, and then through the first flow channel 351, it is diverted by the connector 33 to the collectors 32 of the two adjacent heat exchange bodies 31, and then the collectors 32 transport the fluid to the heat exchange body 31. When fluid flows out, the first flow channel 351 can collect the fluid flowing out from the heat exchange body 31 or the connector 33 and transport it to the second flow channel 361. The second flow channel 361 transports the fluid flowing out from the first flow channel 351 to the interface portion 13.

[0228] In some embodiments, the wall of the second flow channel 361 is provided with a sealing layer 344 in the circumferential direction, at least a portion of the interface portion 13 is inserted into the second flow channel 361, and the sealing layer 344 seals the connection between the second connection portion 36 and the interface portion 13.

[0229] In the above technical solution, the sealing layer 344 seals the connection between the second connecting part 36 and the interface part 13, thereby improving the sealing performance of the connection between the connector 34 and the interface part 13 to a certain extent.

[0230] The inner sealing layer 344 can play a sealing role, which can prevent fluid from leaking between the connector 34 and the interface 13 to a certain extent.

[0231] A sealing layer 344 is disposed on the wall surface of the second flow channel 361 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the second flow channel 361 in the circumferential direction. Optionally, the outer diameter of the interface portion 13 is larger than the inner diameter of the ring of sealing layer 344. After the interface portion 13 is inserted into the second flow channel 361, the sealing layer 344 can be sandwiched between the outer peripheral surface of the interface portion 13 and the wall surface of the second flow channel 361, and the sealing layer 344 can be tightly fitted onto the interface portion 13, thereby sealing the connection between the second connecting portion 36 and the interface portion 13.

[0232] In some embodiments, referring to FIG18, connector 34 includes inlet connector 341, inlet connector 341 includes body 37, first connecting portion 35 and second connecting portion 36, body 37 is provided with first sub-channel 371, first sub-channel 371 connects the first channel 351, second channel 361 and medium channel 311 of inlet connector 341.

[0233] In the above technical solution, fluid can flow from the interface section 13 through the first flow channel 351, the second flow channel 361 and the first sub-flow channel 371 to the medium flow channel 311.

[0234] Specifically, the main body 37 is provided with a first sub-flow channel 371, which is connected to the first flow channel 351, the second flow channel 361 and the medium flow channel 311 respectively. The path of fluid flowing into the heat exchange main body 31 is: the second flow channel 361, the first flow channel 351, the first sub-flow channel 371 and the medium flow channel 311.

[0235] Optionally, the first sub-channel 371 is parallel to the length direction of the heat exchange body 31, so that the fluid can smoothly enter the medium channel 311 through the first sub-channel 371.

[0236] Optionally, the first sub-channel 371 has a certain angle relative to the length direction of the heat exchange body 31 so that the inlet of the first sub-channel 371 is higher than the outlet of the first sub-channel 371 in the horizontal direction, thereby allowing the fluid to flow better from the inlet of the first sub-channel 371 to the outlet of the first sub-channel 371 and enter the medium channel 311 under the action of gravity.

[0237] In some embodiments, referring to FIG18, connector 34 includes outlet connector 342, outlet connector 342 includes body 37, first connecting portion 35 and second connecting portion 36, body 37 is provided with second sub-channel 372, the second sub-channel 372 connects the first channel 351, the second channel 361 and the medium channel 311 of outlet connector 342.

[0238] In the above technical solution, fluid can flow from the medium flow channel 311 through the first flow channel 351, the second flow channel 361 and the second sub-flow channel 372 to the interface section 13.

[0239] Specifically, the main body 37 is provided with a second sub-flow channel 372, which is connected to the first flow channel 351, the second flow channel 361 and the medium flow channel 311 respectively. The path of fluid flowing into the heat exchange main body 31 is: medium flow channel 311, second sub-flow channel 372, first flow channel 351 and second flow channel 361.

[0240] Optionally, the second sub-channel 372 is parallel to the length direction of the heat exchange body 31, so that the fluid can smoothly enter the medium channel 311 through the second sub-channel 372.

[0241] Optionally, the second sub-channel 372 has a certain angle relative to the length direction of the heat exchange body 31 so that the inlet of the second sub-channel 372 is higher than the outlet of the second sub-channel 372 in the horizontal direction, so that the fluid can flow better from the inlet of the second sub-channel 372 to the outlet of the second sub-channel 372 and enter the second channel 361 under the action of gravity.

[0242] In some embodiments, the body 37 of the inlet connector 341 and the body 37 of the outlet connector 342 are integrally formed.

[0243] In the above technical solution, the inlet connector 341 and the outlet connector 342 are integrally formed by the body 37, forming the same component, which helps to simplify the assembly steps.

[0244] Specifically, as shown in Figure 17, the inlet connector 341 and the outlet connector 342 are arranged in the vertical direction. The inlet connector 341 and the outlet connector 342 are integrally formed by the body 37, so that the inlet connector 341 and the outlet connector 342 form the same component. At the same time, the inlet connector 341 and the outlet connector 342 each have fluid flow channels, so that the inlet connector 341 and the outlet connector 342 do not affect each other, which helps to simplify the structure of the heat exchange component 30 and simplify the assembly steps.

[0245] In some embodiments, referring to Figures 9 and 11, the battery device 100 further includes an adapter 38, which includes a first portion 381 and a second portion 382 connected to each other. The first portion 381 is connected to the connector 34, and the second portion 382 is connected to the interface portion 13.

[0246] In the above technical solution, the adapter 38 can connect the connector 34 and the interface 13 at different positions, thereby making the installation of the connector 34 and the interface 13 more flexible.

[0247] Specifically, the first part 381 is connected to the connector 34, and the second part 382 is connected to the interface part 13, thus realizing the connection between the connector 34 and the interface part 13.

[0248] The adapter 38 can extend the connector 34 or the interface 13, so that the connector 34 and the interface 13, which are a certain distance apart, can be connected, which is conducive to the flexible arrangement of the position of the interface 13.

[0249] When the adapter 38 connects the connector 34 and the interface 13, fluid can flow through the interface 13, the adapter 38, and the connector 34 to the heat exchange body 31, or from the heat exchange body 31 through the connector 34 and the adapter 38 to the interface 13.

[0250] Optionally, the connector 34 and the adapter 38 are connected by a plug-in connection, with one of the connector 34 and the adapter 38 having a socket, and the other being at least partially accommodated in the socket, thereby achieving the connection. Optionally, the connector 34 and the adapter 38 are connected by a thread, with one of the connector 34 and the adapter 38 having an internal thread on its housing 343, and the other having an external thread, and the connection is achieved by tightening the corresponding connecting parts.

[0251] In some embodiments, referring to Figures 8, 9 and 13, there is an included angle between the first portion 381 and the second portion 382.

[0252] In the above technical solution, the connection direction between the interface and the connector 33 can be changed by the adapter 38, thereby making the installation of the connector 34 and the interface part 13 more flexible.

[0253] Specifically, the first part 381 and the second part 382 are connected to each other. The lengths of the first part 381 and the second part 382 can be set arbitrarily. At the same time, there is an angle between the first part 381 and the second part 382, ​​so that the connection direction between the interface and the connector 33 can be adjusted, making the installation of the connector 34 and the interface part 13 more flexible.

[0254] Optionally, in one embodiment, the first portion 381 and the second portion 382 are circular tubes, and the axial direction of the first portion 381 is substantially perpendicular to the axial direction of the second portion 382, ​​thereby forming an "L"-shaped adapter 38. This helps to reduce the volume of the adapter 38.

[0255] Optionally, in one embodiment, the first portion 381 and the second portion 382 are circular tubes, and the axial direction of the first portion 381 is substantially the same as the axial direction of the second portion 382, ​​thereby forming a straight-line adapter 38. This extends the length of the connector 34 and helps to reduce pipe bends.

[0256] Optionally, the first part 381 and the second part 382 can be manufactured separately and then connected by means of bonding, welding, etc. In this way, the lengths of the first part 381 and the second part 382, ​​as well as the relative angle between the first part 381 and the second part 382, ​​can be flexibly selected.

[0257] Alternatively, the first part 381 and the second part 382 can also be integrally formed. In this way, the adapter 38 has high structural strength, making it less prone to breakage during use.

[0258] Secondly, this application provides an energy storage device, which includes a plurality of battery devices 100 according to any of the above embodiments, the battery devices 100 being used to store or provide electrical energy.

[0259] An energy storage device includes one or more battery clusters to increase its voltage and capacity. A battery cluster may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device. The definition of battery device 100 is given above and will not be repeated here.

[0260] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0261] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0262] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0263] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0264] As an example, the thermal management module may include a liquid cooling unit (temperature regulating unit) that supplies coolant (fluid) to each battery device 100 via pipelines for regulating the temperature of the battery cells 20.

[0265] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0266] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0267] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage devices.

[0268] As an example, a power distribution module can be used to distribute power to the power consumption modules of an energy storage device.

[0269] Thirdly, this application provides an electrical device, which includes the battery device 100 of any of the above embodiments, or the energy storage device of the above embodiments.

[0270] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0271] 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 enclosure has an interface for communication with the outside. Multiple battery cells; the multiple battery cells are arranged inside the housing; A heat exchange assembly is disposed within the housing and configured to exchange heat with the individual battery cells; wherein the heat exchange assembly includes: The heat exchanger body has internal media flow channels; A current collector is connected to at least one end of the heat exchange body; A connector, configured to be at least one, is connected to the interface portion such that the interface portion communicates with the heat exchange body through the connector, and the connector and the interface portion are located on at least one side of the length direction of the heat exchange body; A connector for connecting the current collector and / or the joint.

2. The battery device according to claim 1, characterized in that, The plurality of battery cells are arranged along a first direction, or the plurality of battery cells are arranged perpendicular to a second direction, wherein the first direction is perpendicular to the second direction, and the length direction of the heat exchange body is parallel to the first direction or the second direction.

3. The battery device according to claim 2, characterized in that, The interface portion is disposed on at least one side wall of the housing along the length direction of the heat exchange body.

4. The battery device according to claim 1, characterized in that, The side of the heat exchange body contacts the side of the battery cell to exchange heat with the battery cell.

5. The battery device according to claim 4, characterized in that, The side of the battery cell includes a first side surface, which is the surface with the largest area among the side surfaces of the battery cell, and the side surface of the heat exchange body is in contact with the first side surface.

6. The battery device according to claim 1, characterized in that, The current collector is located at both ends or one end of the same heat exchange body.

7. The battery device according to claim 1, characterized in that, The joint includes an inlet joint and an outlet joint, which are located at the same end of the heat exchange body along its length, or; The inlet and outlet connectors are located at opposite ends of the heat exchanger body along its length.

8. The battery device according to claim 1, characterized in that, The connector is detachably connected to the current collector.

9. The battery device according to claim 8, characterized in that, The collector is provided with a connecting pipe, and the connector includes a first connecting part. The first connecting part is provided with a first flow channel. The first flow channel has two insertion ports at both ends of the first connecting part along the extension direction. The connecting pipes of two adjacent collectors are respectively inserted into the first flow channel through the two insertion ports.

10. The battery device according to claim 9, characterized in that, The connector includes a housing and a sealing layer. The housing includes the first connecting part. The sealing layer is disposed on the wall of the first flow channel along the circumferential direction of the first flow channel. The sealing layer seals and connects the first connecting part and the connecting pipe.

11. The battery device according to claim 10, characterized in that, The connector includes a second connecting part that is connected to the first connecting part. The second connecting part is provided with a second flow channel that communicates with the first flow channel. The second connecting part is connected to the interface part.

12. The battery device according to claim 11, characterized in that, The wall of the second flow channel is provided with a sealing layer in the circumferential direction, at least a portion of the interface portion is inserted into the second flow channel, and the sealing layer seals and connects the second connection portion and the interface portion.

13. The battery device according to claim 8, characterized in that, The two adjacent current collectors are clamped together to fix the connector.

14. The battery device according to claim 1, characterized in that, The connector is detachably connected to the connecting pipe.

15. The battery device according to claim 14, characterized in that, The connector includes a body and a first connecting part. The body is connected to the heat exchange body. The first connecting part is provided with a first flow channel. The body is connected to the first connecting part so that the medium flow channel is connected to the first flow channel. The first flow channel has two insertion ports at both ends of the first connecting part along the extension direction. Two adjacent connectors are inserted into the first flow channel through the two insertion ports respectively.

16. The battery device according to claim 15, characterized in that, The connector includes a housing and a sealing layer. The housing includes the first connecting portion. The sealing layer is disposed on the wall of the first flow channel along the circumferential direction of the first flow channel. The sealing layer seals and connects the first connecting portion and the connector.

17. The battery device according to claim 15, characterized in that, The connector includes a second connecting part that is connected to the body. The second connecting part is provided with a second flow channel, which communicates with the first flow channel and the medium flow channel. The second connecting part is connected to the interface part.

18. The battery device according to claim 17, characterized in that, The connector includes an inlet connector, which includes the body, the first connecting part, and the second connecting part. The body has a first sub-channel, which connects the first channel, the second channel, and the medium channel of the inlet connector.

19. The battery device according to claim 18, characterized in that, The connector includes an outlet connector, which includes the body, the first connecting portion and the second connecting portion. The body has a second sub-channel, which connects the first channel, the second channel and the medium channel of the outlet connector.

20. The battery device according to claim 19, characterized in that, The inlet connector body and the outlet connector body are integrally formed.

21. The battery device according to claim 1, characterized in that, The battery device also includes an adapter, which includes a first part and a second part that are connected to each other. The first part is connected to the connector, and the second part is connected to the interface.

22. The battery device according to claim 21, characterized in that, There is an angle between the first part and the second part.

23. An energy storage device, characterized in that, The battery device includes any one of claims 1-22, the battery device being used to store or provide electrical energy.

24. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-22, or the energy storage device according to claim 23.

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