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 member (13) in communication with the outside. The plurality of battery cells (20) are arranged inside the case (10). The heat exchange assembly (30) is arranged inside the case (10), the heat exchange assembly (30) being configured to exchange heat with the battery cells (20). The heat exchange assembly (30) comprises a heat exchange main body (31), a fluid collector (32), a connecting member (33) and a connector (34). The heat exchange main body (31) has a medium flow channel inside, and the heat exchange main body (31) is arranged between adjacent battery cells (20). The fluid collector (32) is connected to at least one end of the heat exchange main body (31), and the fluid collector (32) is in communication with the medium flow channel. The connecting member (33) connects a plurality of fluid collectors (32). At least one connector (34) is provided, and the connector (34) connects the fluid collector (32) and the interface member (13).

Description

Battery devices, energy storage devices and electrical appliances Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery device, an energy storage device, and an electrical device. Background Technology

[0002] With the development of the new energy vehicle industry, battery packs are becoming increasingly compact in their structural design in pursuit of higher energy density. Currently, individual battery cells in battery packs are primarily cooled by liquid cooling. Therefore, it is necessary to provide a battery device that can transport the fluid used for heat exchange. Summary of the Invention

[0003] In view of the above problems, this application provides a battery device, an energy storage device, and an electrical device, which is capable of transporting fluid for heat exchange.

[0004] In a first aspect, this application provides a battery device, the battery device comprising:

[0005] The enclosure is equipped with interface components for communication with the outside.

[0006] Multiple battery cells; multiple battery cells are arranged inside the casing;

[0007] A heat exchange assembly, housed within the housing, is configured to exchange heat with individual battery cells; the heat exchange assembly includes:

[0008] The heat exchanger body has a medium flow channel inside and is arranged between adjacent battery cells;

[0009] The heat exchanger is connected to at least one end of the heat exchange body and is connected to the medium flow channel.

[0010] Connector, used to connect multiple current collectors;

[0011] A connector, configured as at least one, connects the current collector and the interface component.

[0012] In the battery device of this application, the heat exchange fluid can enter and exit the collector through the interface and connector, and the collector and connector can distribute the fluid to each heat exchange body and collect the fluid flowing out of each heat exchange body, thereby realizing the heat exchange between the battery cell and the fluid by the heat exchange body.

[0013] In one embodiment, the interface element is located on a first sidewall of the housing near one end of the heat exchange body along the extension direction.

[0014] In the above embodiments, the interface components and connectors can be easily assembled.

[0015] In one embodiment, the first sidewall includes at least one of the front sidewall, rear sidewall, left sidewall, and right sidewall of the battery device.

[0016] In the above embodiments, the interface component can be disposed on at least one of the front side wall, rear side wall, left side wall and right side wall of the battery device, thereby allowing for flexible configuration of the interface component's position.

[0017] In one embodiment, the first sidewall intersects the extension direction of the heat exchange body.

[0018] In the above embodiments, an interface component can be provided on the first sidewall that intersects with the extension direction of the heat exchange body to facilitate the connection between the interface component and the connector.

[0019] In one embodiment, the first sidewall is perpendicular to the extension direction of the heat exchange body.

[0020] The above embodiments can further facilitate the connection between the interface component and the connector.

[0021] In one embodiment, the side of the heat exchange body contacts the side of the battery cell to exchange heat with the battery cell.

[0022] In the above embodiments, the battery cells can exchange heat with the heat exchange body through surface contact, which is beneficial to improving the heat exchange efficiency of the heat exchange body and the battery cells.

[0023] In one embodiment, the side surface 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.

[0024] In the above embodiments, the side of the heat exchange body contacts the surface with the largest area on the side of the battery cell, which can further improve the heat exchange efficiency between the heat exchange body and the battery cell.

[0025] In one embodiment, the current collectors are located at both ends or one end of the same heat exchanger body.

[0026] In the above embodiments, the position of the current collector can be flexibly configured.

[0027] In one embodiment, the connector includes an inlet connector and an outlet connector, which are located at the same end of the heat exchange body along the extension direction and are connected to two adjacent collectors.

[0028] In the above embodiments, a connector and an interface can be connected to one end of the heat exchange body along the extension direction, which is beneficial to improving the overall assembly efficiency of the connector and interface.

[0029] In one embodiment, the connector includes an inlet connector and an outlet connector, which are located at opposite ends of the heat exchange body along the extension direction. The inlet connector is connected to two adjacent collectors at one end of the heat exchange body along the extension direction, and the outlet connector is connected to two adjacent collectors at the other end of the heat exchange body along the extension direction.

[0030] In the above embodiments, joints and interface pieces can be connected at both ends of the heat exchange body along the extension direction, which is beneficial to improving the assembly efficiency of a single joint and a single interface piece.

[0031] In one embodiment, the connector is detachably connected to the current collector.

[0032] The above embodiments can simplify the structure of the current collector and facilitate the maintenance of the current collector and connectors.

[0033] In one embodiment, the current collector is provided with a connecting pipe, and the connector includes a first connecting part. One of the first connecting part and the connecting pipe is provided with a first flow channel, and at least a portion of the other is inserted into the first flow channel.

[0034] In the above embodiments, the current collector can be detachably connected to the connector via a plug-in method, which is simple to assemble and highly efficient.

[0035] In one embodiment, the current collector is provided with a first limiting part, and the connector includes a second limiting part provided on the first connecting part. The first limiting part and the second limiting part abut against each other to restrict the connector from rotating relative to the current collector.

[0036] In the above embodiments, the first limiting part and the second limiting part abut against each other to restrict the joint from rotating relative to the manifold, thereby improving the reliability of the connection between the joint and the manifold to a certain extent.

[0037] In one embodiment, the first limiting part is disposed on the outer side of the outer peripheral surface of the connecting tube, and the second limiting part is disposed on the outer peripheral surface of the first connecting part, with the second limiting part located between the first limiting part and the first connecting part.

[0038] In the above embodiments, the first limiting part and the second limiting part can be quickly contacted when the connector is assembled with the current collector, which can improve the assembly efficiency to a certain extent.

[0039] In one embodiment, the first limiting portion includes a first plane, and the second limiting portion includes a second plane, wherein the first plane and the second plane are parallel to each other and abut against each other.

[0040] In the above embodiments, the reliability of the contact between the first limiting part and the second limiting part can be improved to a certain extent by having two parallel planes abut against each other.

[0041] In one embodiment, one of the first limiting portion and the second limiting portion is provided with a notch, and at least a portion of the other is embedded in the notch.

[0042] In the above embodiments, the notch of one limiting part can limit the other limiting part, thereby restricting the joint from rotating relative to the manifold.

[0043] In one embodiment, 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.

[0044] In the above embodiments, 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.

[0045] In one embodiment, the first connecting part is provided with a first flow channel, and 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 collectors are respectively inserted into the first flow channel through the two insertion ports.

[0046] In the above embodiments, the first connecting part of the connector can connect to the connecting pipes of two adjacent collectors, so that the fluid can be diverted to the two adjacent collectors and the fluid flowing out of the two adjacent collectors can be merged into the connector.

[0047] In one embodiment, 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 an interface component.

[0048] In the above embodiments, the second flow channel can transport fluid from the interface to the first flow channel, and transport fluid from the first flow channel to the interface.

[0049] In one embodiment, the wall of the second flow channel is provided with a sealing layer in the circumferential direction, at least a portion of the interface component is inserted into the second flow channel, and the sealing layer seals the connection between the second connection portion and the interface component.

[0050] In the above embodiments, the sealing layer seals the second connecting part and the interface component, thereby improving the sealing performance of the connection between the connector and the interface component to a certain extent.

[0051] In one embodiment, the sealing layer is interference-fitted with the connecting pipe and the interface component.

[0052] In the above embodiments, the connection sealing between the connector and the manifold, as well as between the connector and the interface component, can be improved to a certain extent.

[0053] In one embodiment, the sealing layer and the housing are manufactured using a two-color injection molding process.

[0054] In the above embodiments, the sealing layer and the housing are manufactured using a two-color injection molding process, which can improve the manufacturing efficiency of the connector and reduce costs to a certain extent.

[0055] In one embodiment, the insertion port of the first flow channel is provided with an annular guide portion around its periphery. The guide portion is gradually widening in a direction away from the first connecting portion, and is configured to guide the connecting tube into the first flow channel.

[0056] In the above embodiments, the guide is configured to guide the insertion of the connecting pipe into the first flow channel, which can improve assembly efficiency to a certain extent.

[0057] In one embodiment, two adjacent manifolds are clamped together to secure the joints.

[0058] In the above embodiments, clamping and fixing the two adjacent manifolds can improve the reliability of the connection between the manifold and the manifold.

[0059] Secondly, this application provides an energy storage device, which includes a plurality of battery devices according to any of the above embodiments, the battery devices being used to store or provide electrical energy.

[0060] 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.

[0061] In the energy storage device and electrical device of this application, the fluid used for heat exchange can enter and exit the collector through the interface and connector, and the collector and connector can distribute the fluid to each heat exchange body and collect the fluid flowing out from each heat exchange body, thereby realizing the heat exchange between the battery cell and the fluid by the heat exchange body.

[0062] 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

[0063] 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:

[0064] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0065] Figure 2 is an exploded structural diagram of a battery device according to some embodiments of this application;

[0066] Figure 3 is a schematic diagram of the structure of a heat exchange component according to some embodiments of this application;

[0067] Figure 4 is another structural schematic diagram of a heat exchange component according to some embodiments of this application;

[0068] Figure 5 is an exploded structural diagram of a heat exchange component according to some embodiments of this application;

[0069] Figures 6 to 8 are perspective structural diagrams of connectors according to some embodiments of this application.

[0070] 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 component 13, inlet interface component 131, outlet interface component 132; Battery cell 20, first side 21; Heat exchange assembly 30, heat exchange body 31, 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 36, insertion port 361, second limiting part 37, second plane 38, second connecting part 39, second flow channel 391; Connecting pipe 40, first limiting part 50, first plane 51, guide part 60. Detailed Implementation

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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).

[0077] 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.

[0078] 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.

[0079] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0080] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0081] 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.

[0082] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0083] With the development of the new energy vehicle industry, battery packs are becoming increasingly compact in their structural design in pursuit of higher energy density. Currently, individual battery cells in battery packs are primarily cooled by liquid cooling. Therefore, it is necessary to provide a battery device that can transport the fluid used for heat exchange.

[0084] To address the problem of transporting fluid for heat exchange, this application provides a battery device comprising a housing, multiple battery cells, and a heat exchange assembly. The housing has an interface for external communication. Multiple battery cells are arranged within the housing. The heat exchange assembly is disposed within the housing and configured to exchange heat with the battery cells. The heat exchange assembly includes a heat exchange body, a current collector, a connector, and a joint. The heat exchange body has a media flow channel internally and is disposed between adjacent battery cells. The current collector is connected to at least one end of the heat exchange body and communicates with the media flow channel. The connector connects multiple current collectors. At least one joint is configured to connect the current collector and the interface.

[0085] In such a battery device, the heat exchange fluid can enter and exit the collector through the interface and connector, and the collector and connector can distribute the fluid to each heat exchange body and collect the fluid flowing out of each heat exchange body, thereby realizing the heat exchange between the battery cell and the fluid by the heat exchange body.

[0086] 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.

[0087] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0088] 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.

[0089] 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.

[0090] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0091] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] Referring to Figures 2 to 8, this application embodiment 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.

[0103] The heat exchange assembly 30 includes a heat exchange body 31, a current collector 32, a connector 33, and a joint 34. The heat exchange body 31 has a media flow channel (not shown) inside and is disposed between adjacent battery cells 20. The current collector 32 is connected to at least one end of the heat exchange body 31 and communicates with the media flow channel. The connector 33 connects multiple current collectors 32. At least one joint 34 is configured to connect the current collector 32 and the interface member 13.

[0104] The enclosure 10 protects and houses the battery cells 20, heat exchange components 30, and other components. Other components of the battery device 100 include, but are not limited to, high-voltage boxes, battery management systems, busbar components, and sampling 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.

[0105] 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.

[0106] 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. 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.

[0107] Optionally, a plurality of battery cells 20 may be arranged along a first direction to form a battery module, and multiple battery modules may 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 may be the longitudinal direction of the vehicle, and the second direction may be the lateral direction of the vehicle. In another embodiment, the first direction may be the lateral direction of the vehicle, and the second direction may be the longitudinal direction of the vehicle.

[0108] The heat exchange assembly 30 is housed within the enclosure 10, which protects and contains the heat exchange assembly 30. The heat exchange assembly 30 can exchange heat with the battery cells 20, allowing the battery cells 20 to operate within their normal temperature range.

[0109] The heat exchanger body 31 has a medium flow channel inside, through which a heat exchange fluid can flow. The fluid can exchange heat with the battery cells 20 through the heat exchanger body 31, thereby heating or cooling the battery cells 20. The heat exchanger body 31 is disposed between two adjacent battery cells 20, and the heat exchanger body 31 can contact two adjacent battery cells 20. Therefore, on the one hand, one heat exchanger body 31 can exchange heat with two adjacent battery cells 20 simultaneously, which can reduce the number of heat exchanger bodies 31, reduce costs, and simplify the structure of the battery device 100. On the other hand, the heat exchanger body 31 can also physically separate two adjacent battery cells 20. In the event of thermal runaway in one battery cell 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. The fluid includes, but is not limited to, water, ethylene glycol, and mixtures thereof (such as ethylene glycol-water mixtures).

[0110] The medium flow channel within a heat exchanger body 31 can be single or multiple. Multiple medium flow channels 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. A single medium flow channel can simplify the structure of the heat exchanger body 31 and make it easier to manufacture. The shape of the medium flow channel includes, but is not limited to, meandering, straight, etc. Optionally, a straight medium flow channel can extend along the length of the heat exchanger body 31, and multiple straight medium flow channels can be arranged parallel to each other.

[0111] 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 rectangular, and the heat exchange body is rectangular to match 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. In one embodiment, the current collector 32 is connected to one end of the heat exchange body 31. In one embodiment, two current collectors 32 are respectively connected to the two ends of the heat exchange body 31.

[0112] The collector 32 is connected to the medium flow channel, allowing fluid to flow from the collector 32 into the medium flow channel and vice versa. The collector 32 has an internal flow channel connected to the medium flow channel, which can be used for fluid diversion and convergence. During diversion, fluid flows from the interface 13 into the connector 34. The collector 32 can then divert fluid flowing from the connector 33 or connector 34 into the same or different medium flow channels within the heat exchange body 31 via the flow channel, allowing fluid to flow into the medium flow channel for heat exchange with the battery cell 20. During convergence, the collector 32 can guide the heat-exchanged fluid to the connector 33 or connector 34 via the flow channel, allowing the fluid to flow back to the interface 13, forming a fluid circulation flow.

[0113] The connector 33 can connect multiple manifolds 32. Specifically, in one embodiment, one connector 33 can connect two adjacent manifolds 32, allowing fluid to flow from one manifold 32 into another adjacent manifold 32 through the connector 33. The connector 33 may include, but is not limited to, a straight pipe.

[0114] Optionally, in one embodiment, the connector 34 is configured as a single connector 34, which connects the current collector 32 and the interface member 13. This allows fluid to flow into the current collector 32 through the interface member 13 and then into the connector 34, and / or allows fluid to flow out of the current collector 32 and then into the interface member 13 through the connector 34. Optionally, in one embodiment, the connector 34 is configured as a plurality of connectors 34, each connector 34 connecting a corresponding current collector 32 and the interface member 13. This allows fluid to flow from the interface member 13 into the current collector 32 through the connector 34, and from the current collector 32 into the interface member 13 through the connector 34. Optionally, the number of interface members 13 can be multiple, with one interface member 13 connecting one or more connectors 34. Optionally, the number of interface members 13 is single, with a single interface member 13 connecting all connectors 34.

[0115] When fluid flows from the heat exchanger body 31 into the collector 32 connected to the connector 34, the fluid can flow through the connector 34 into the interface member 13. When fluid flows from the interface member 13 into the connector 34 connected to the collector 32, the fluid can flow through the connector 34 into the collector 32.

[0116] Specifically, when fluid flows from interface 13 into connector 34, the fluid can flow through connector 34 into collector 32 connected to connector 34. On the one hand, collector 32 connected to connector 34 can allow fluid to flow into the medium channel. On the other hand, collector 32 connected to connector 34 can allow fluid to flow into another adjacent collector 32 through connector 33, thereby achieving that the fluid flows into the medium channel of all heat exchange bodies 31.

[0117] When fluid flows back from connector 34 to interface 13, on the one hand, after flowing out of the medium channel, the fluid enters the collector 32, flows through the connector 33 connected to the collector 32 into another adjacent collector 32 until it reaches the collector 32 connected to connector 34. On the other hand, after flowing out of the medium channel, the fluid enters the collector 32 connected to connector 34. Fluid flows from the collector 32 connected to connector 34 into interface 13.

[0118] In summary, in the battery device 100 of this application, the fluid used for heat exchange can enter the current collector 32 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.

[0119] Furthermore, the connector 34 is connected to the collector 32. The connector 34 and the collector 32 can be separate, which can simplify the structure of the collector 32, reduce the manufacturing difficulty and cost of the collector 32 to a certain extent, and also improve problems such as backflow and excessive flow resistance in the flow channel.

[0120] According to some embodiments of this application, optionally, referring to Figures 2 and 3, the interface 13 is located on the first sidewall of the housing 10 near the end of the heat exchange body 31 along the extension direction.

[0121] In the above embodiments, the interface component 13 and the connector 34 can be easily assembled.

[0122] Specifically, in one embodiment, the heat exchange body 31 extends along its length, and the current collector 32 is located at one or both ends of the heat exchange body 31 along its length. The connector 34 connects to the current collector 32. The first sidewall of the housing 10 is close to one end of the heat exchange body 31 along its extension direction, and the interface piece 13 is located on the first sidewall. This allows for a smaller distance between the interface piece 13 and the connector 34, making it easier to assemble the connector 34 and the interface piece 13. It also reduces the length of the corresponding connecting pipe, which helps to reduce costs. Furthermore, it reduces the loss of cold or heat in the flow path of the fluid from the interface piece 13 to the connector 34, which helps to improve the cooling or heating efficiency of the battery cell 20.

[0123] Optionally, in one embodiment, when the battery device 100 is mounted on the vehicle 1000, the extension direction of the heat exchange body 31 is the longitudinal direction of the vehicle. Optionally, in one embodiment, when the battery device 100 is mounted on the vehicle 1000, the extension direction of the heat exchange body 31 is the lateral direction of the vehicle.

[0124] According to some embodiments of this application, optionally, referring to FIG2, the first sidewall includes at least one of the front sidewall, rear sidewall, left sidewall, and right sidewall of the battery device 100.

[0125] In the above embodiments, the interface component 13 can be disposed on at least one of the front side wall, rear side wall, left side wall and right side wall of the battery device 100, so that the position of the interface component 13 can be flexibly configured.

[0126] Specifically, the front and rear side walls of the battery device 100 can be the two side walls of the housing 10 along the front-rear direction of the vehicle, and the left and right side walls of the battery device 100 can be the two side walls of the housing 10 along the left-right direction of the vehicle.

[0127] In one embodiment, the first sidewall includes a front sidewall, a rear sidewall, a left sidewall, and a right sidewall of the battery device 100. The interface member 13 may be disposed on the front sidewall, rear sidewall, left sidewall, and right sidewall of the battery device 100.

[0128] In one embodiment, the first sidewall includes any one, any two, or any three of the front sidewall, rear sidewall, left sidewall, and right sidewall of the battery device 100. The interface member 13 may be disposed on any one, any two, or any three of the front sidewall, rear sidewall, left sidewall, and right sidewall of the battery device 100.

[0129] Referring to Figure 2, the first sidewall includes the left sidewall and the right sidewall of the battery device 100, and the interface component 13 is respectively provided on the left sidewall and the right sidewall.

[0130] According to some embodiments of this application, optionally, referring to Figures 2 and 3, the first sidewall intersects with the extension direction of the heat exchange body 31.

[0131] In the above embodiments, an interface component 13 can be provided on the first sidewall that intersects with the extension direction of the heat exchange body 31 to facilitate the connection between the interface component 13 and the connector 34.

[0132] Specifically, the interface component 13 is disposed on the first side wall. The current collector 32 is connected to at least one end of the heat exchange body 31, such that the current collector 32 is located on at least one end of the heat exchange body 31 along the extension direction. The first side wall is the side wall of the housing 10 closest to the end of the heat exchange body 31 along the extension direction. The first side wall intersects with the extension direction of the heat exchange body 31, so that the interface component 13 on the first side wall and the connector 34 connected to the current collector 32 are relatively close, which facilitates the connection between the interface component 13 and the connector 34 and improves assembly efficiency.

[0133] According to some embodiments of this application, optionally, referring to Figures 2 and 3, the first sidewall is perpendicular to the extension direction of the heat exchange body 31.

[0134] The above embodiments can further facilitate the connection between the interface component 13 and the connector 34.

[0135] Specifically, the first sidewall is perpendicular to the extension direction of the heat exchange body 31, so that the first sidewall is close to one end of the heat exchange body 31. The interface 13 on the first sidewall and the connector 34 connected to the collector 32 are also close to each other, which can further facilitate the connection between the interface 13 and the connector 34.

[0136] In one embodiment, referring to Figure 3, the current collector 32 is disposed at both ends of the heat exchange body 31 along the extension direction near the first sidewall. The first sidewall is the left and right sidewalls of the battery device 100. The extension direction of the heat exchange body 31 is the left and right direction of the vehicle. The interface 13 is disposed on the left and right sidewalls of the battery device 100.

[0137] In one embodiment, the current collector 32 is disposed at one end of the heat exchange body 31 along the extension direction near the first sidewall, the first sidewall being the left or right sidewall of the battery device 100, the extension direction of the heat exchange body 31 being the left-right direction of the vehicle, and the interface member 13 being disposed on the left or right sidewall of the battery device 100.

[0138] According to some embodiments of this application, optionally, referring to the figures, the side of the heat exchange body 31 contacts the side of the battery cell 20 to exchange heat with the battery cell 20.

[0139] In the above embodiments, the battery cell 20 can exchange heat with the heat exchange body 31 through surface contact, which is beneficial to improving the heat exchange efficiency of the heat exchange body 31 and the battery cell 20.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] According to some embodiments of this application, optionally, referring to Figures 2 and 3, the side 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 surface of the heat exchange body 31 is in contact with the first side surface 21.

[0144] In the above embodiments, the side surface of the heat exchange body 31 is in contact with the surface with the largest area on the side surface of the battery cell 20, which can further improve the heat exchange efficiency between the heat exchange body 31 and the battery cell 20.

[0145] Optionally, in one embodiment, the battery cell 20 can be a prismatic battery cell. The outer shell of the battery cell 20 is cuboid in shape. The first side surface 21 is the surface with the largest area among the sides of the outer shell, 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 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.

[0146] 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 Figure 2) 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.

[0147] According to some embodiments of this application, optionally, referring to Figure 3 or Figure 4, the current collector 32 is located at both ends or one end of the same heat exchange body 31.

[0148] In the above embodiments, the position of the current collector 32 can be flexibly configured.

[0149] 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.

[0150] 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 heat exchange body 31 extends in the left-right direction of the vehicle, the collectors 32 are located at the left and right ends of the heat exchange body 31, the interface pieces 13 are located on the left and right side walls of the housing 10, and the connector 34 is connected to the interface piece 13, thereby allowing fluid to flow from the collectors 32 through the connector 34 to the interface piece 13, and from the interface piece 13 through the connector 34 to the collectors 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.

[0151] 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.

[0152] 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 extension direction. In one embodiment, the extension direction of the heat exchange body 31 is the left-right direction of the vehicle, the collector 32 is located at the left or right end of the heat exchange body 31, the interface member 13 is located on the left or right side wall of the housing 10, and the connector 34 is connected to the interface member 13, thereby allowing fluid to flow from the collector 32 through the connector 34 to the interface member 13, and from the interface member 13 through the connector 34 to the collector 32. 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, and the other connector 33 can serve as a connector for fluid outflow from the collector 32.

[0153] According to some embodiments of this application, optionally, referring to Figures 3 and 4, 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 the extension direction and are connected to two adjacent collectors 32.

[0154] In the above embodiments, the connector 34 and the interface piece 13 can be connected to one end of the heat exchange body 31 along the extension direction, which is beneficial to improving the overall assembly efficiency of the connector 34 and the interface piece 13.

[0155] It should be noted that Figure 4 only shows one connector 34 located at one end of the heat exchanger body 31 along the extension direction; the other connector 34 is not shown. Referring to Figure 3, to illustrate, connector 34 includes an inlet connector 341 and an outlet connector 342. 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, both inlet connector 341 and outlet connector 342 can 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.

[0156] The interface component 13 includes an inlet interface component 131 and an outlet interface component 132. The inlet interface component 131 is connected to the inlet connector 341, and the outlet interface component 132 is connected to the outlet connector 342. The inlet interface component 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.

[0157] The outlet fitting 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 fitting 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 fitting 131, the inlet connector 341, the collector 32 and the connector 33.

[0158] Referring to Figure 3, the inlet connector 341 and the outlet connector 342 are connected to two adjacent collectors 32. Therefore, two connectors 34 and two interface pieces 13 can be connected to one end of the heat exchange body 31 along the extension direction, which is beneficial to improving the overall assembly efficiency of the connectors 34 and interface pieces 13.

[0159] According to some embodiments of this application, optionally, referring to FIG3, the connector 34 includes an inlet connector 341 and an outlet connector 342. The inlet connector 341 and the outlet connector 342 are respectively located at both ends of the heat exchange body 31 along the extension direction. The inlet connector 341 is connected to two adjacent collectors 32 on one end of the heat exchange body 31 along the extension direction, and the outlet connector 342 is connected to two adjacent collectors 32 on the other end of the heat exchange body 31 along the extension direction.

[0160] In the above embodiments, the connectors 34 and interface pieces 13 can be connected at both ends of the heat exchange body 31 along the extension direction, which is beneficial to improving the assembly efficiency of a single connector 34 and a single interface piece 13.

[0161] Specifically, the interface component 13 includes an inlet interface component 131 and an outlet interface component 132. The inlet interface component 131 is connected to the inlet connector 341, and the outlet interface component 132 is connected to the outlet connector 342. The inlet interface component 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.

[0162] The outlet fitting 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 fitting 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 fitting 131, the inlet connector 341, the collector 32 and the connector 33.

[0163] Referring to Figure 3, the inlet connector 341 is connected to two adjacent collectors 32 on one end of the heat exchange body 31 along the extension direction (the left end as shown in Figure 3). Therefore, at one end of the heat exchange body 31, the inlet connector 341 can be connected to the inlet fitting 131, which can avoid the outlet fitting 132 and the outlet connector 342 occupying additional operating space and is conducive to improving the assembly efficiency of the inlet fitting 131 and the inlet connector 341.

[0164] Referring to Figure 3, the outlet connector 342 is connected to the collector 32 on the other end of the heat exchange body 31 along the extension direction (the right end as shown in Figure 3). Therefore, at the other end of the heat exchange body 31, the outlet connector 342 can be connected to the outlet fitting 132, which avoids the inlet fitting 131 and the inlet connector 341 occupying additional operating space and helps to improve the assembly efficiency of the outlet fitting 132 and the outlet connector 342.

[0165] According to some embodiments of this application, optionally, referring to Figures 3 to 5, the connector 34 is detachably connected to the current collector 32.

[0166] In the above embodiments, the structure of the current collector 32 can be simplified, and the maintenance of the current collector 32 and the connector 34 can be facilitated.

[0167] 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.

[0168] Detachable connection methods include, but are limited to, bolt connection, snap-fit ​​connection, plug-in connection, clamping, etc.

[0169] According to some embodiments of this application, optionally, referring to FIG5, the current collector 32 is provided with a connecting pipe 40, and the connector 34 includes a first connecting part 35. One of the first connecting part 35 and the connecting pipe 40 is provided with a first flow channel 36, and at least a portion of the other is inserted into the first flow channel 36.

[0170] In the above embodiments, the current collector 32 can be detachably connected to the connector 34 by plugging in, which is simple to assemble and highly efficient.

[0171] Optionally, in one embodiment, referring to Figures 5 to 8, the first connecting portion 35 is provided with a first flow channel 36, and at least a portion of the connecting tube 40 is inserted into the first flow channel 36. The connecting tube 40 may be completely inserted into the first flow channel 36 or partially inserted into the first flow channel 36. After the connecting tube 40 is inserted into the first flow channel 36, the first connecting portion 35 can clamp the connecting tube 40.

[0172] The shape of the first flow channel 36 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, thus preventing fluid leakage. In Figure 5, both the shape of the first flow channel 36 and the shape of the connecting pipe 40 are cylindrical.

[0173] During assembly, the connecting pipe 40 can be aligned with the first flow channel 36 and inserted into the first flow channel 36, thereby completing the assembly of the collector 32 and the connector 34.

[0174] Optionally, in one embodiment, the connecting pipe 40 is provided with a first flow channel 36, and at least a portion of the first connecting part 35 is inserted into the first flow channel 36.

[0175] According to some embodiments of this application, optionally, referring to Figures 4 to 8, the current collector 32 is provided with a first limiting part 50, and the connector 34 includes a second limiting part 37 provided on the first connecting part 35. The first limiting part 50 and the second limiting part 37 abut against each other to restrict the connector 34 from rotating relative to the current collector 32.

[0176] In the above embodiments, the first limiting part 50 and the second limiting part 37 abut against each other to restrict the joint 34 from rotating relative to the collector 32, thereby improving the reliability of the connection between the joint 34 and the collector 32 to a certain extent.

[0177] In one embodiment, referring to Figure 5, the first flow channel 36 and the connecting pipe 40 are cylindrical. After the connecting pipe 40 is inserted into the first flow channel 36, the cylindrical shape makes it easy for the connecting pipe 40 and the connector 34 to rotate relative to each other. By abutting the first limiting part 50 on the current collector 32 and the second limiting part 37 on the first connecting part 35, the rotation of the connector 34 relative to the current collector 32 is restricted. This can, to a certain extent, prevent the connection between the connecting pipe 40 and the first connecting part 35 from loosening and causing fluid leakage during the use of the battery device 100 due to the rotation of the connector 34 relative to the current collector 32, thereby improving the reliability of the connection between the connector 34 and the current collector 32.

[0178] According to some embodiments of this application, optionally, referring to Figures 4 and 5, the first limiting part 50 is disposed on the outer side of the outer peripheral surface of the connecting pipe 40, and the second limiting part 37 is disposed on the outer peripheral surface of the first connecting part 35, with the second limiting part 37 located between the first limiting part 50 and the first connecting part 35.

[0179] In the above embodiments, the first limiting part 50 and the second limiting part 37 can be quickly contacted when the connector 34 is assembled with the current collector 32, which can improve the assembly efficiency to a certain extent.

[0180] Specifically, the first limiting part 50 and the connecting pipe 40 are located on the side of the current collector 32 facing the connector 34. The first limiting part 50 is located on the outer side of the outer peripheral surface of the connecting pipe 40, and is spaced apart from the outer peripheral surface of the connecting pipe 40. The second limiting part 37 is located on the outer peripheral surface of the first connecting part 35. During assembly, the connecting pipe 40 is aligned with the first flow channel 36 of the first connecting part 35 and inserted into the first flow channel 36. During insertion, the walls of the second limiting part 37 and the first connecting part 35 gradually enter the gap between the first limiting part 50 and the outer peripheral surface of the connecting pipe 40. After the connecting pipe 40 is inserted into place, one side of the second limiting part 37 can abut against one side of the first limiting part 50, thereby restricting the rotation of the connector 34 relative to the current collector 32.

[0181] According to some embodiments of this application, optionally, referring to Figures 4 and 5, the first limiting part 50 includes a first plane 51, and the second limiting part 37 includes a second plane 38, wherein the first plane 51 and the second plane 38 are parallel to each other and abut against each other.

[0182] In the above embodiments, the reliability of the contact between the first limiting part 50 and the second limiting part 37 can be improved to a certain extent by having two parallel planes abut against each other.

[0183] The shape of the first plane 51 includes, but is not limited to, regular or irregular shapes such as squares and circles. The shape of the second plane 38 includes, but is not limited to, regular or irregular shapes such as squares and circles. The shapes of the first plane 51 and the second plane 38 can be the same or different.

[0184] Referring to Figures 4 and 5, both the first plane 51 and the second plane 38 are square planes, which are parallel to each other and abut against each other. The first limiting part 50 and the second limiting part 37 restrict the rotation of the connector 34 relative to the collector 32 by means of planar abutment. The abutment area is large, which can improve the reliability of the abutment between the first limiting part 50 and the second limiting part 37 to a certain extent.

[0185] According to some embodiments of this application, optionally, one of the first limiting portion 50 and the second limiting portion 37 is provided with a notch (not shown), and at least a portion of the other is embedded in the notch.

[0186] In the above embodiments, the notch of one limiting part can limit the other limiting part, thereby restricting the rotation of the connector 34 relative to the collector 32.

[0187] Optionally, in one embodiment, the first limiting part 50 is provided with a notch, and part or all of the second limiting part 37 is embedded in the notch, so that the first limiting part 50 and the second limiting part 37 abut against each other to restrict the joint 34 from rotating relative to the collector 32.

[0188] Optionally, in one embodiment, the second limiting part 37 is provided with a notch, and part or all of the first limiting part 50 is embedded in the notch, so that the first limiting part 50 abuts against the second limiting part 37 to restrict the joint 34 from rotating relative to the collector 32.

[0189] During the assembly of the connector 34 and the collector 32, one of the limiting parts can be inserted into the notch to restrict the connector 34 from rotating relative to the collector 32, thereby achieving the assembly of the connector 34 and the collector 32, and also achieving the mutual contact of the first limiting part 50 and the second limiting part 37.

[0190] According to some embodiments of this application, optionally, referring to Figures 5 to 8, 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 36 in the circumferential direction of the first flow channel 36. The sealing layer 344 seals and connects the first connecting portion 35 and the connecting pipe 40.

[0191] In the above embodiments, 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.

[0192] Optionally, in one embodiment, referring to Figures 4 and 5, the first connecting portion 35 is provided with a first flow channel 36, and at least a portion of the connecting portion is inserted into the first flow channel 36. The material of the housing 343 includes, but is not limited to, polydodecanoic acid (PA12), 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 from the connector 34 and the collector 32 to a certain extent.

[0193] A sealing layer 344 is disposed on the wall surface of the first flow channel 36 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the first flow channel 36 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 36, 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 36. 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.

[0194] Optionally, in one embodiment, the connecting pipe 40 is provided with a first flow channel 36, and at least a portion of the first connecting portion 35 is inserted into the first flow channel 36. After the first connecting portion 35 is inserted into the first flow channel 36, the sealing layer 344 can be sandwiched between the outer peripheral surface of the first connecting portion 35 and the wall surface of the first flow channel 36, thereby sealing the connection between the first connecting portion 35 and the connecting pipe 40.

[0195] According to some embodiments of this application, optionally, referring to Figures 5 to 8, the first connecting portion 35 is provided with a first flow channel 36, and the first flow channel 36 forms two insertion ports 361 at both ends of the extending direction of the first connecting portion 35. The connecting pipes 40 of two adjacent collectors 32 are respectively inserted into the first flow channel 36 through the two insertion ports 361.

[0196] In the above embodiments, the first connecting part 35 of the connector 34 can connect to the connecting pipe 40 of two adjacent collectors 32, so that the fluid can be diverted to the two adjacent collectors 32 and the fluid flowing out of the two adjacent collectors 32 can be merged into the connector 34.

[0197] The first flow channel 36 has two insertion ports 361 at both ends of the first connecting part 35 extending in the direction of extension. The connecting pipes 40 on the two adjacent collectors 32 can be inserted into the first flow channel 36 through the two insertion ports 361 respectively, so that the first connecting part 35 connects the two adjacent collectors 32.

[0198] Specifically, in one embodiment, referring to Figures 4 and 5, the interface 13 is connected to the connector 34. When fluid flows in, it can flow from the interface 13 into the connector 34, and then through the first flow channel 36 of the first connection portion 35 to two adjacent collectors 32 connected thereto. From there, it flows into the medium flow channel of the heat exchange body 31 and through the connector 33 to another collector 32. When fluid flows out, it can flow from the heat exchange body 31 into the collectors 32, and the connector 34 can collect the fluid flowing out of the two adjacent collectors 32 connected thereto through the first flow channel 36 back to the interface 13.

[0199] According to some embodiments of this application, optionally, referring to the figures, the connector 34 includes a second connecting portion 39 connected to the first connecting portion 35. The second connecting portion 39 is provided with a second flow channel 391, which communicates with the first flow channel 36. The second connecting portion 39 is connected to the interface member 13.

[0200] In the above embodiments, the second flow channel 391 can transport fluid from the interface member 13 to the first flow channel 36, and transport fluid from the first flow channel 36 to the interface member 13.

[0201] In one embodiment, referring to Figures 4 to 8, the second connecting portion 39 is connected to the outer peripheral surface of the first connecting portion 35, so that the connector 34 forms a tee configuration. The second connecting portion 39 is connected to the interface member 13. When fluid flows in, the second flow channel 391 can transport the fluid flowing in from the interface member 13 to the first flow channel 36, and then the fluid is diverted to two adjacent collectors 32 by the first flow channel 36. The two adjacent collectors 32 then transport the fluid to the heat exchange body 31 and to the next collector 32 via the connecting member 33. When fluid flows out, the first flow channel 36 can collect the fluid flowing out from the two adjacent collectors 32 and transport it to the second flow channel 391. The second flow channel 391 transports the fluid flowing out from the first flow channel 36 to the interface member 13.

[0202] Optionally, according to some embodiments of this application, referring to Figures 6 to 8, a sealing layer 344 is provided on the wall of the second flow channel 391 in the circumferential direction, at least a portion of the interface member 13 is inserted into the second flow channel 391, and the sealing layer 344 seals the connection between the second connection portion 39 and the interface member 13.

[0203] In the above embodiments, the sealing layer 344 seals the connection between the second connecting part 39 and the interface piece 13, thereby improving the sealing performance of the connection between the connector 34 and the interface piece 13 to a certain extent.

[0204] 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.

[0205] A sealing layer 344 is disposed on the wall surface of the second flow channel 391 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the second flow channel 391 in the circumferential direction. Optionally, the outer diameter of the interface member 13 is larger than the inner diameter of the ring of sealing layer 344. After the interface member 13 is inserted into the second flow channel 391, the sealing layer 344 can be sandwiched between the outer peripheral surface of the interface member 13 and the wall surface of the second flow channel 391, and the sealing layer 344 can be tightly fitted onto the interface member 13, thereby sealing the connection between the second connecting part 39 and the interface member 13.

[0206] According to some embodiments of this application, optionally, referring to Figures 4 and 5, the sealing layer 344 is interference-fitted with the connecting pipe 40 and the interface piece 13.

[0207] In the above embodiments, the connection sealing between the connector 34 and the current collector 32, as well as between the connector 34 and the interface piece 13, can be improved to a certain extent.

[0208] Specifically, in one embodiment, the outer diameter of the connecting pipe 40 can be larger than the inner diameter of the sealing layer 344. After the connecting pipe 40 is inserted into the first flow channel 36, the connecting pipe 40 can squeeze the sealing layer 344 within the first flow channel 36, so that the connecting pipe 40 and the sealing layer 344 are connected by an interference fit, thereby making the sealing layer 344 tightly fit the connecting pipe 40 and improving the connection sealing performance between the connector 34 and the collector 32.

[0209] In one embodiment, the outer diameter of the interface member 13 can be larger than the inner diameter of the sealing layer 344. After the interface member 13 is inserted into the second flow channel 391, the interface member 13 can squeeze the sealing layer 344 within the second flow channel 391, so that the interface member 13 and the sealing layer 344 are connected by an interference fit, thereby making the sealing layer 344 tightly fit the interface member 13 and improving the connection sealing performance between the connector 34 and the interface member 13.

[0210] The interference fit between the connecting pipe 40 and the sealing layer 344, and the interference fit between the interface piece 13 and the sealing layer 344, can be determined based on factors such as sealing performance, cost, assembly efficiency, and experience.

[0211] According to some embodiments of this application, optionally, referring to Figures 6 to 8, the sealing layer 344 and the housing 343 are manufactured by a two-color injection molding process.

[0212] In the above embodiments, the sealing layer 344 and the housing 343 are manufactured by a two-color injection molding process, which can improve the manufacturing efficiency of the connector 34 and reduce costs to a certain extent.

[0213] Specifically, two-color injection molding is a process that allows another component (such as an elastomer) to be formed on a rigid substrate, ultimately creating a product composed of polymers with different mechanical properties and different two-color injection visual effects, which are then permanently bonded together. For example, two different materials can be injected into the same mold, and through injection molding technology and mold design, the combination and molding of the two materials can be achieved, thereby producing the corresponding product.

[0214] In this application, the rigid substrate is the shell 343, and the sealing layer 344 is an elastomer. Therefore, a joint structure with an outer hard shell and an inner soft sealing layer 344 can be formed using a two-color injection molding process. The two-color injection molding process is mature, the product is easy to manufacture, and the material cost is low, thereby improving the manufacturing efficiency of the joint 34 and reducing costs to a certain extent.

[0215] Optionally, according to some embodiments of this application, referring to Figures 4 to 8, the insertion port 361 of the first flow channel 36 is provided with an annular guide portion 60 around its periphery. The guide portion 60 is gradually widening in the direction away from the first connecting portion 35, and the guide portion 60 is configured to guide the connecting tube 40 into the first flow channel 36.

[0216] In the above embodiments, the guide portion 60 is configured to guide the insertion of the connecting tube 40 into the first flow channel 36, which can improve assembly efficiency to a certain extent.

[0217] When assembling the connector 34 and the collector 32, the connector 34 can approach the connecting pipe 40, and the guide portion 60 can first contact the connecting pipe 40. Since the guide portion 60 has a gradually expanding shape away from the first connecting portion 35, when the guide portion 60 approaches the connecting portion, the opening size of the outward-facing portion of the guide portion 60 is larger, making it easier for the connecting pipe 40 to enter the guide portion 60. The connecting pipe 40 can be guided along the inner wall surface of the guide portion 60 and enter the first flow channel 36, thereby improving the assembly efficiency of the connector 34 and the collector 32 to a certain extent.

[0218] Optionally, in one embodiment, referring to Figures 6 and 7, the sealing layer 344 extends to the inner wall surface of the guide portion 60. Optionally, in one embodiment, referring to Figures 5 and 6, the second limiting portion 37 extends to the outer peripheral surface of the guide portion 60.

[0219] According to some embodiments of this application, optionally, referring to Figures 3 and 4, two adjacent current collectors 32 are clamped to fix the connector 34.

[0220] In the above embodiments, the clamping and fixing of the connector 34 between two adjacent current collectors 32 can improve the reliability of the connection between the connector 34 and the current collector 32.

[0221] In one embodiment, referring to Figure 3, the heat exchange body 31 has collectors 32 at both ends along its extension direction. 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. The connector 34 at the left end of the heat exchange body 31 can be either an inlet connector 341 or an outlet connector 342, and the connector 34 at the right end of the heat exchange body 31 can 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.

[0222] In one embodiment, referring to Figure 4, a collector 32 is provided on one end (e.g., the left or right end) of the heat exchange body 31 along its extension direction. 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. The inlet connector 341 and the outlet connector 342 on the left or right end of the heat exchange body 31 are clamped and fixed by two adjacent collectors 32 on the left or right end.

[0223] 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.

[0224] 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.

[0225] 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.

[0226] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0227] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] As an example, a power distribution module can be used to distribute power to the power consumption modules of an energy storage device.

[0234] 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.

[0235] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0236] 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 by, include: The enclosure is equipped with interface components 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: A heat exchange body has a medium flow channel inside, and the heat exchange body is disposed between adjacent battery cells; A collector is connected to at least one end of the heat exchange body, and the collector is connected to the medium flow channel; Connector, for connecting multiple current collectors; A connector, configured to be at least one, connects the current collector and the interface element.

2. The battery device according to claim 1, characterized by The interface component is located on the first side wall of the housing near the end of the heat exchange body along the extension direction.

3. The battery device of claim 2, wherein The first sidewall includes at least one of the front sidewall, rear sidewall, left sidewall, and right sidewall of the battery device.

4. The battery device according to claim 2 or 3, characterized by The first sidewall intersects the extension direction of the heat exchange body.

5. The battery device of claim 4, wherein The first sidewall is perpendicular to the extension direction of the heat exchange body.

6. The battery device according to any one of claims 1 to 5, wherein The side of the heat exchange body contacts the side of the battery cell to exchange heat with the battery cell.

7. The battery device of claim 6, wherein The side surface 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.

8. The battery device according to any one of claims 1 to 7, characterized by, The current collector is located at both ends or one end of the same heat exchange body.

9. The battery device according to any one of claims 1 to 8, wherein The connector includes an inlet connector and an outlet connector, which are located at the same end of the heat exchange body along the extension direction and are connected to two adjacent collectors, or; The inlet connector and the outlet connector are located at both ends of the heat exchange body along the extension direction. The inlet connector is connected to two adjacent collectors at one end of the heat exchange body along the extension direction, and the outlet connector is connected to two adjacent collectors at the other end of the heat exchange body along the extension direction.

10. The battery device according to any one of claims 1 to 9, characterized by, The connector is detachably connected to the current collector.

11. The battery device according to any one of claims 1 to 10, wherein The current collector is provided with a connecting pipe, and the connector includes a first connecting part. One of the first connecting part and the connecting pipe is provided with a first flow channel, and at least a portion of the other is inserted into the first flow channel.

12. The battery device of claim 11, wherein, The current collector is provided with a first limiting part, and the connector includes a second limiting part provided on the first connecting part. The first limiting part and the second limiting part abut against each other to restrict the connector from rotating relative to the current collector.

13. The battery device of claim 12, wherein, The first limiting part is disposed on the outer side of the outer peripheral surface of the connecting tube, and the second limiting part is disposed on the outer peripheral surface of the first connecting part, with the second limiting part located between the first limiting part and the first connecting part.

14. The battery device according to claim 12 or 13, characterized by The first limiting part includes a first plane, and the second limiting part includes a second plane. The first plane and the second plane are parallel to each other and abut against each other.

15. The battery device according to claim 12 or 13, characterized by One of the first limiting part and the second limiting part is provided with a notch, and at least a portion of the other part is embedded in the notch.

16. The battery device according to any one of claims 11 to 15, wherein 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.

17. The battery device of claim 16, wherein, The first connecting part is provided with the first flow channel, two insertion openings are formed at both ends of the first connecting part along the extension direction, and the connecting pipes of the adjacent two current collectors are inserted into the first flow channel through the two insertion openings respectively.

18. The battery device of claim 17, wherein, The joint comprises a second connecting part connected with the first connecting part, the second connecting part is provided with a second flow channel, the second flow channel is communicated with the first flow channel, and the second connecting part is connected with the interface piece.

19. The battery device of claim 18, wherein, The wall surface of the second flow channel is provided with the sealing layer along the circumferential direction, at least a part of the interface piece is inserted into the second flow channel, and the sealing layer seals and connects the second connecting part and the interface piece.

20. The battery device of claim 19, wherein, The sealing layer is connected with the connecting pipe and the interface piece in an interference fit.

21. The battery device of any one of claims 16-20, wherein, The sealing layer and the shell are manufactured through a double-color injection molding process.

22. The battery device of any one of claims 11-21, wherein, The insertion opening periphery of the first flow channel is provided with an annular guide part, the guide part is gradually expanded in a direction away from the first connecting part, and the guide part is configured to guide the insertion of the connecting pipe into the first flow channel.

23. The battery device of any one of claims 1-22, wherein, The adjacent two current collectors are clamped and fixed to the joint.

24. An energy storage device, comprising: The battery device comprises a plurality of battery devices according to any one of claims 1-23, and is used for storing or providing electric energy.

25. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1-23 or the energy storage device according to claim 24.

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