Battery device and electric appliance

Abstract

The embodiment of the present application provides a battery device and a power utilization equipment, which comprise a box body having a containing space; a battery monomer assembly contained in the containing space and comprising a plurality of battery monomers arranged along a first direction; and a heat exchange pipe comprising a heat exchange section and a connecting section in communication with each other, the heat exchange section being arranged at one side of the battery monomer assembly along a third direction and extending along the first direction, the heat exchange section being used for adjusting the temperature of the battery monomer assembly, and the connecting section comprising a bending section bent relative to the heat exchange section and used for conveying a heat exchange medium; wherein the cross section of the bending section is rectangular, the dimension of the heat exchange section along the third direction is greater than the dimension of the bending section along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other in pairs. The embodiment of the present application is favorable for improving the use performance of the battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In battery technology, the performance of battery devices is crucial, directly affecting their safety, reliability, and lifespan. Therefore, improving the performance of battery devices is a pressing technical problem that needs to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical appliance, which helps to improve the performance of the battery device.

[0005] In a first aspect, a battery device is provided, including a housing, a battery cell assembly, and a heat exchange tube. The housing has a receiving space; the battery cell assembly is housed within the receiving space, and the battery cell assembly includes a plurality of battery cells arranged along a first direction; the heat exchange tube includes a heat exchange section and a connecting section that are interconnected. The heat exchange section is disposed on one side of the battery cell assembly along a second direction and extends along the first direction, and the heat exchange section is used to regulate the temperature of the battery cell assembly. The connecting section includes a bent section that is bent relative to the heat exchange section, and the connecting section is used to transport a heat exchange medium. The bent section has a circular cross-section, and the dimension of the heat exchange section along a third direction is greater than the dimension of the bent section along a third direction. The first direction, the second direction, and the third direction are mutually perpendicular.

[0006] In this embodiment, on the one hand, the connecting section is bent relative to the heat exchange section by the bending section, which can reduce the space occupied by the heat exchange tube in the battery device in the first direction and improve the overall space utilization. On the other hand, the cross-section of the bending section is set to be circular. Compared with the rectangular cross-section, the bending radius of the circular tube is smaller, which further reduces the space occupation, and the bending angle is not limited, and the bending process is simple and easy to implement. Furthermore, in the third direction, the size of the heat exchange section is larger, which can increase the heat exchange area between the heat exchange section and the battery cell assembly and improve the heat exchange efficiency.

[0007] In some embodiments, the heat exchange section has a rectangular cross-section.

[0008] In this embodiment, by setting the cross-section of the heat exchange section to be rectangular, compared with a circular tube, the heat exchange area between the heat exchange section and the battery cell assembly can be increased, thereby improving the heat exchange efficiency and improving the reliability of the battery device. Furthermore, the heat exchange section can be obtained by directly flattening the portion of the circular heat exchange tube located in the heat exchange section, which is simple in process and easy to form and process.

[0009] In some embodiments, the bent section is bent in a second direction relative to the heat exchange section.

[0010] In this embodiment, the bending section bends relative to the heat exchange section along the second direction, which can utilize the space in the battery device along the second direction and further improve the overall space utilization.

[0011] In some embodiments, the connecting section further includes an extension section extending in a third direction, and the bending section is also bent in a second direction relative to the extension section to connect the heat exchange section and the extension section.

[0012] In this embodiment, the extension section extends along a third direction, thereby making reasonable use of the internal space of the battery device. The bending section undergoes two bends, which can better connect the heat exchange section extending along the first direction and the extension section extending along the third direction. Furthermore, the circular tube-shaped bending section has a smaller bending radius, which can more effectively utilize the arrangement space of the battery device and improve the adaptability of the heat exchange system.

[0013] In some embodiments, the battery device further includes a current collector assembly connected to the extension and used for supplying and / or recovering heat exchange medium to the heat exchange tubes, the current collector assembly being located on one side of the battery cell assembly along a third direction.

[0014] In this embodiment, since multiple battery cells in the battery cell assembly are arranged along a first direction, and the heat exchange section also extends along the first direction, by placing the current collector on one side of the battery cell assembly along a third direction, space in the battery device can be saved in the first direction to accommodate more battery cells, thereby increasing the energy density of the battery device. In particular, when the third direction is the vehicle's travel direction, other electrical components in the battery device are often placed on one side of the battery cell assembly along the third direction. Placing the current collector within the space where these electrical components are located allows for a more rational arrangement of the current collector's position, improving the overall space utilization of the battery device.

[0015] In some embodiments, the heat exchange tube includes two connecting sections, which are respectively connected to both ends of the heat exchange section, and both connecting sections are located on the same side of the heat exchange section along a first direction, and the extensions of the two connecting sections are arranged sequentially along a second direction.

[0016] In this embodiment of the application, by setting the two connecting sections in the heat exchange tube to be located on the same side of the heat exchange section along the first direction, the heat exchange medium can be uniformly input and output from one side, making the overall layout of the heat exchange structure more compact. Furthermore, the multiple extension sections are arranged sequentially along the second direction, which can utilize the space of the battery cell in the height direction, thereby further improving the overall space utilization of the battery device.

[0017] In some embodiments, the current collection assembly includes a first current collection cavity and a second current collection cavity that are isolated from each other. The first current collection cavity and the second current collection cavity are respectively connected to the extensions of two connecting sections, and the first current collection cavity and the second current collection cavity are arranged along a second direction.

[0018] In this embodiment, on the one hand, by connecting one extension of the heat exchange tube to the first collector cavity and the other extension of the heat exchange tube to the second collector cavity, a complete heat exchange medium loop can be formed in the battery device, thereby improving heat exchange efficiency. On the other hand, the first and second collector cavities are arranged along a second direction, which can utilize the space of the battery device in the height direction, reduce the space occupied by the collector assembly, and improve space utilization.

[0019] In some embodiments, the current collector assembly has a cavity structure, and the current collector assembly further includes a spacer plate disposed within the cavity of the current collector assembly, dividing the current collector assembly into a first current collector cavity and a second current collector cavity.

[0020] In this embodiment, the first current collection cavity and the second current collection cavity are integrated as a whole, which can further save the space occupied by the current collection component, while also reducing the material of the current collection component and lowering the processing cost.

[0021] In some embodiments, the battery device includes a plurality of battery cell assemblies arranged along a third direction, the housing includes a limiting member disposed at one end of the battery cell assembly along a first direction, the limiting member extends along a third direction to abut against the plurality of battery cell assemblies, and the limiting member has a cavity inside, a connecting segment passing through the cavity and communicating with a current collector assembly.

[0022] In this embodiment, by setting a limiting member, the expansion force generated by the battery cell can be resisted, thereby improving the overall stability of the battery device. Furthermore, the connecting section is housed in the cavity inside the limiting member, which reduces the space occupied by the connecting section inside the housing and improves the overall energy density of the battery device.

[0023] In some embodiments, the heat exchange tube further includes a transition section for connecting the heat exchange section and the connecting section, wherein the size of the transition section gradually decreases from one end near the connecting section to one end near the heat exchange section along a second direction.

[0024] In this embodiment, by setting a transition section, the connecting section and the heat exchange section can be smoothly connected, reducing turbulence caused by inconsistencies in size or shape between the connecting section and the heat exchange section, reducing pressure drop, and improving the circulation efficiency of the heat exchange medium. Furthermore, in the second direction, the size of the transition section gradually decreases, making the size of the heat exchange section smaller than that of the connecting section in the second direction. Correspondingly, the size of the heat exchange section in the third direction is larger than that of the connecting section in the third direction. This reduces the space occupied by the heat exchange section while increasing the heat exchange area between the heat exchange section and the battery cell assembly, thereby improving heat exchange efficiency.

[0025] In some embodiments, the connecting section, transition section, and heat exchange section are integrally extruded from a hollow circular tube.

[0026] In this embodiment, on the one hand, the integrally extruded connecting section maintains a circular tube shape and connects to the current collector assembly after bending. Its bending radius is small, which avoids occupying too much space. Moreover, the bending process is simple and easy to implement, and it can be bent in different directions to adapt to current collector assemblies in different positions. The heat exchange section is formed into a flat tube shape, thereby increasing the contact area between the heat exchange section and the battery cell assembly, improving heat dissipation performance, and also improving the bonding strength when the heat exchange section is bonded to other components. On the other hand, the connecting section, transition section and heat exchange section are directly integrally extruded from a hollow circular tube, which can reduce seams and welding points, reduce the risk of leakage of heat exchange tubes, and the integral extrusion method is simple to process, which can save materials and reduce costs.

[0027] In some embodiments, the battery device further includes a heat-conducting plate disposed on one side of the battery cell assembly along the second direction, and at least one heat exchange section is disposed on the side of the heat-conducting plate away from the battery cell assembly.

[0028] In this embodiment of the application, by setting a heat-conducting plate, local overheating or undercooling of the battery cell assembly can be avoided, thereby improving the overall heat distribution uniformity of the battery cell assembly.

[0029] In some embodiments, the battery device includes a plurality of battery cell assemblies arranged along a third direction and a plurality of heat-conducting plates spaced apart along a third direction, the plurality of heat-conducting plates extending along a first direction, and two adjacent battery cell assemblies abutting against the same heat-conducting plate.

[0030] In the embodiments of this application, multiple heat-conducting plates are spaced apart along a third direction. Compared with a single heat-conducting plate, this can save materials while increasing the overall energy density of the battery device. In addition, the heat-conducting plates can also support the weight of the individual battery cells, simplifying the overall structure and weight of the battery device.

[0031] In some embodiments, the battery device further includes an insulating portion extending along a first direction and disposed at both ends of the heat-conducting plate along a third direction.

[0032] In this embodiment, the insulating portion extends along the first direction and is disposed at both ends of the heat-conducting plate along the third direction. When the battery cell is connected to the heat-conducting plate, the insulating portion can reduce the conductive connection between the electrode terminals of the battery cell and the heat-conducting plate, thus reducing the risk of safety issues. Therefore, the insulating portion can improve the safety performance of the battery device.

[0033] In some embodiments, the housing further includes a frame, a cover, and a base plate. The cover is connected to the frame, and the base plate is connected to the frame. The base plate, frame, and cover together form an accommodating space. The heat-conducting plate is connected to the frame, and the battery cell assembly is mounted on the heat-conducting plate.

[0034] In this embodiment, the heat-conducting plate is connected to the frame, so that the heat-conducting plate and the heat exchange tube can be fixed inside the box, improving the stability of the heat exchange structure. The heat-conducting plate can also be used to support the weight of the battery cell assembly, improving the overall stability of the battery device.

[0035] In some embodiments, the heat-conducting plate and the base plate are spaced apart.

[0036] In the embodiments of the application, the heat-conducting plate and the base plate are spaced apart, so that the base plate does not bear the weight of the individual battery components, thus protecting the base plate. In addition, in the event of an external impact to the base plate, the heat exchange components are spaced apart from the base plate, which can protect the individual battery components and thus improve the safety performance of the battery device.

[0037] In a second aspect, an electrical device is provided, including a battery device as described in any of the first aspects, wherein the battery device provides electrical energy to the electrical device. Attached Figure Description

[0038] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of this application is shown.

[0039] Figure 2 An exploded view of a battery device provided in one embodiment of this application is shown.

[0040] Figure 3 A partial structural schematic diagram of a battery device provided in one embodiment of this application is shown.

[0041] Figure 4 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0042] Figure 5 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0043] Figure 6 A front view of a portion of the structure of a battery device provided in an embodiment of this application is shown.

[0044] Figure 7 A front view of a portion of the structure of a battery device provided in yet another embodiment of this application is shown.

[0045] Figure 8 A schematic diagram of the structure of a current collection component provided in an embodiment of this application is shown.

[0046] Figure 9 A partially enlarged view of a portion of the structure of a battery device provided in an embodiment of this application is shown.

[0047] The accompanying drawings are not drawn to scale.

[0048] Figure label:

[0049] Vehicle 1; Battery unit 10; Battery cell 20; Controller 30; Motor 40; Housing 11; Limiting component 111; Frame 112; Cover 113; Base plate 114; Battery cell assembly 12; Heat exchange pipe 13; Heat exchange section 131; Connecting section 132; Bending section 1321; Extension section 1322; Transition section 133; Current collector assembly 14; First current collector cavity 141; Second current collector cavity 142; Spacer 143; Liquid supply sleeve 151; Liquid drain sleeve 152; Heat conducting plate 16; Insulation part 17. Detailed Implementation

[0050] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0053] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0057] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0058] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0059] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0060] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0061] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0062] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0063] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0064] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0065] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0066] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0067] The battery device 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, which are connected in series, parallel, or mixed connections via a busbar.

[0068] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0069] 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.

[0070] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0071] With increasing environmental pollution, the new energy industry is attracting more and more attention. Within this industry, battery technology is a crucial factor in its development. However, in the development of battery technology, the arrangement of heat exchange structures in battery devices is often difficult to adapt to the complex internal spatial structure of the battery device, easily leading to wasted space and affecting the energy density of the battery.

[0072] Based on the above considerations, in order to improve the reliability of the battery device while increasing its space utilization, this application provides a battery device, including a housing, a battery cell assembly, and a heat exchange tube. The housing has a receiving space; the battery cell assembly is housed within the receiving space and includes multiple battery cells arranged along a first direction; the heat exchange tube includes an interconnected heat exchange section and a connecting section. The heat exchange section is disposed on one side of the battery cell assembly along a second direction and extends along the first direction, and is used to regulate the temperature of the battery cell assembly. The connecting section includes a bent section that bends relative to the heat exchange section and is used to transport a heat exchange medium. The bent section has a circular cross-section, and the dimension of the heat exchange section along a third direction is larger than the dimension of the bent section along a third direction. The first direction, the second direction, and the third direction are mutually perpendicular.

[0073] In this embodiment, on the one hand, the connecting section is bent relative to the heat exchange section by the bending section, which can reduce the space occupied by the heat exchange tube in the battery device in the first direction and improve the overall space utilization. On the other hand, the cross-section of the bending section is set to be circular. Compared with the rectangular cross-section, the bending radius of the circular tube is smaller, which further reduces the space occupation, and the bending angle is not limited, and the bending process is simple and easy to implement. Furthermore, in the third direction, the size of the heat exchange section is larger, which can increase the heat exchange area between the heat exchange section and the battery cell assembly and improve the heat exchange efficiency.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices. For example, such electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0075] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical equipment described above, but can also be applied to all equipment using battery devices. For the sake of simplicity, the following embodiments will be described in detail using a vehicle as an example of electrical equipment.

[0076] For example, such as Figure 1 As shown, Figure 1 A schematic diagram of a vehicle 1 according to an embodiment of this application is shown. Vehicle 1 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 motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1's electrical system, or it can be used for the power needs of vehicle 1's starting, navigation, and operation. In some implementations of this application, the battery device 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0077] Figure 2 An exploded view of the battery device 10 provided in one embodiment of this application is shown. Figure 3 This paper shows a partial structural schematic diagram of a battery device 10 provided in one embodiment of the present application. For example, Figure 3 As shown Figure 2 A partial structural schematic diagram of the battery device 10 shown; Figure 4 As shown Figure 3 A partial structural schematic diagram of the battery device 10 shown; Figure 5 As shown Figure 2A partial structural schematic diagram of the provided battery device 10.

[0078] It should be understood that, for ease of description, the embodiments in this application are described as follows: Figures 2 to 5 As shown, taking the battery device in the figure as an example, the first direction X can be the arrangement direction of multiple battery cells in the battery cell assembly. The first direction X is perpendicular to the second direction Z and the third direction Y, or the first direction X can also be the length direction or width direction of the battery device. The second direction Z can be the height direction of the battery device. The third direction Y can be the width direction of the battery device, or the third direction Y can be the length direction of the battery device. It should be understood that the size of the battery device in the length direction is larger than the size of the battery device in the width direction. When multiple battery cells are arranged along the length direction, the first direction X is the length direction of the battery device, and the third direction Y is the width direction of the battery device; when multiple battery cells are arranged along the width direction, the first direction X is the width direction of the battery device, and the third direction Y is the length direction of the battery device. It should also be understood that the directional descriptions of all figures in the embodiments of this application are consistent with... Figures 2 to 5 The directional descriptions are consistent with those in the text, and will not be repeated hereafter.

[0079] According to some embodiments of this application, refer to Figures 2 to 5 This application proposes a battery device 10, including a housing 11, a battery cell assembly 12, and a heat exchange pipe 13. The housing 11 has a receiving space; the battery cell assembly 12 is housed in the receiving space and includes a plurality of battery cells 20 arranged along a first direction X; the heat exchange pipe 13 includes a heat exchange section 131 and a connecting section 132 that are interconnected. The heat exchange section 131 is disposed on one side of the battery cell assembly 12 along a second direction Z and extends along the first direction X. The heat exchange section 131 is used to regulate the temperature of the battery cell assembly 12. The connecting section 132 includes a bent section 1321 that is bent relative to the heat exchange section 131. The connecting section 132 is used to transport the heat exchange medium. The cross-section of the bent section 1321 is circular, and the dimension of the heat exchange section 131 along a third direction Y is larger than the dimension of the bent section 1321 along a third direction Y. The first direction X, the second direction Z, and the third direction Y are all perpendicular to each other.

[0080] The battery device 10 of this application embodiment may include a housing 11. The housing 11 can be any structure with a accommodating space, so that the battery cells 20 can be accommodated inside the housing 11. For example, the interior of the housing 11 can be a hollow structure, and multiple battery cells 20 can be accommodated inside the housing 11. The housing 11 can be a single integral piece, or it can be composed of multiple separate structures assembled together.

[0081] For example, in some embodiments, the housing 11 may include two parts, namely a first housing part and a second housing part, which are fastened together. The shapes of the first housing part and the second housing part may be determined according to the shape of the components housed inside, for example, according to the shape of a combination of multiple battery cells 20 housed inside. At least one of the first housing part and the second housing part has an opening.

[0082] For example, in some embodiments, the housing 11 may include three or more parts. For instance, the housing 11 includes a cover, a frame, and a bottom. The frame has two openings that are disposed opposite each other. The cover and the bottom cover the two openings respectively, and a plurality of battery cells 20 are accommodated in the housing space formed by the cover, the frame, and the bottom.

[0083] The battery cell assembly 12 of this application embodiment may include one or more battery cells 20. In addition, the shape of the battery cell 20 in this application embodiment can be set according to the actual application. For example, the battery cell 20 can be cylindrical, or it can be cuboid or other shapes. This application embodiment is not limited to this.

[0084] In some embodiments, to improve the space utilization within the battery device 10, the battery cells 20 within the battery device 10 are typically arranged in a certain pattern. For example, as... Figure 2 As shown, the battery device 10 may include a plurality of battery cells 20 arranged along a first direction X; further, if the number of battery cells 20 in the battery device 10 is large, the battery device 10 may also include a plurality of battery cell assemblies 12 arranged along a third direction Y.

[0085] In some embodiments, the heat exchange tube 13 may include a heat exchange section 131, which may be disposed on any side of the battery cell assembly 12 along the second direction Z, for adjusting the temperature of the battery cell assembly 12, thereby achieving heat dissipation and cooling or heating of the battery cell assembly 12.

[0086] The heat exchange section 131 can extend along the first direction X, thereby enabling temperature regulation of multiple battery cells 20 arranged along the first direction X.

[0087] It should be understood that the battery device 10 in this application embodiment may include a plurality of heat exchange tubes 13. For example, the battery device 10 may include a plurality of heat exchange tubes 13, which are spaced apart along a third direction Y. The number of heat exchange tubes 13 may be adjusted according to actual conditions, and this application embodiment is not limited thereto.

[0088] The heat exchange tube 13 may also include a connecting section 132, which can be used to transport the heat exchange medium, thereby allowing the heat exchange medium in the heat exchange tube 13 to flow continuously.

[0089] The heat exchange section 131 and the connecting section 132 are interconnected. The connecting section 132 can input the heat exchange medium into the heat exchange section 131, and can also output the heat exchange medium from the heat exchange section 131, so that the heat exchange medium flows in the heat exchange tube 13.

[0090] In the embodiments of this application, interconnected components can refer to two parts forming a single integral structure, or they can be separate structures connected and fixed by integral furnace brazing, or by other methods such as induction welding, adhesive bonding, or hot melting. This application does not impose any limitations on this. It should be understood that connection in the embodiments of this application refers to the process of fixing two or more components together in some way to form a single integral structure. For example, fixing by welding, bolting, riveting, or adhesive bonding. Connectivity refers to forming a medium or signal flow path between two or more components through pipes or channels.

[0091] The connecting segment 132 can be located at any one or both ends of the heat exchange segment 131 along the first direction X. Alternatively, the connecting segment 132 can also be located at any one or both ends of the heat exchange segment 131 along the third direction Y. Or, the connecting segment 132 can be located on any one or both sides of the heat exchange segment 131 along the second direction Z. The embodiments of this application do not limit the position of the connecting segment 132.

[0092] The connecting segment 132 in this embodiment may include a bent segment 1321, which may be bent relative to the heat exchange segment 131.

[0093] The bending section 1321 can be bent once or multiple times relative to the heat exchange section 131. For example, the bending section 1321 can be bent once relative to the heat exchange section 131 along the second direction Z. Another example is that the bending section 1321 can be bent once relative to the heat exchange section 131 along the third direction Y. Yet another example is that the bending section 1321 can be bent once relative to the heat exchange section 131 along the second direction Z, and then bent once again along the third direction Y.

[0094] It should be understood that, in the first direction X, the heat exchange section 131 may extend beyond the end of the battery cell assembly 12 along the first direction X. For example, in the first direction X, the end of the heat exchange section 131 near the bending section 1321 extends beyond the end of the battery cell assembly 12 near the bending section 1321, thereby enabling the bending section 1321 to bend along the second direction Z.

[0095] For example, the bending section 1321 can be bent in a direction further away from the side wall of the heat exchange section 131 along the side wall of the third-direction Y-direction housing 11, so that the connecting section 132 can accommodate more of the internal space of the housing 11, thereby making it easier to maintain the heat exchange tube 13.

[0096] The cross-sectional shape of the bent section 1321 can be circular, rectangular, polygonal, or other shapes. That is, the bent section 1321 can be a round tube, a flat tube, etc.

[0097] It should be understood that the cross section of the bent section 1321 can be a section of the bent section 1321 that is perpendicular to the flow direction of the heat exchange medium.

[0098] In some embodiments, the cross-sectional shape of the bent section 1321 is circular. Compared with a rectangular cross-section, the bending radius of the circular tube is smaller, further reducing space occupation, and the bending angle is not limited, making the bending process simple and easy to implement.

[0099] The cross-sectional shape of the connecting segment 132 can be circular, rectangular, polygonal, or other shapes. That is, the connecting segment 132 can be a round pipe, a flat pipe, etc. The cross-sectional shape at any position in the connecting segment 132 can be circular, rectangular, polygonal, or other shapes.

[0100] It should be understood that the cross-sectional shape of other locations in the connecting segment 132 may be the same as or different from the cross-sectional shape of the bending segment 1321. For example, the cross-sectional shape of the bending segment 1321 in the connecting segment 132 may be circular, and the cross-sectional shape of the connecting segment 132 other than the bending segment 1321 may also be circular. As another example, the cross-sectional shape of the bending segment 1321 in the connecting segment 132 may be circular, and the cross-sectional shape of the connecting segment 132 other than the bending segment 1321 may be rectangular.

[0101] It should be understood that the cross section of the connecting section 132 can be a section of the connecting section 132 that is perpendicular to the flow direction of the heat exchange medium.

[0102] The cross-sectional shape of the heat exchange section 131 can be circular, rectangular, polygonal, or other shapes. That is, the heat exchange section 131 can be a round tube, a flat tube, etc.

[0103] It should be understood that the cross section of heat exchange section 131 can refer to the cross section of heat exchange section 131 that is perpendicular to the flow direction of the heat exchange medium.

[0104] The cross-sectional shape of the connecting section 132 can be the same as or different from that of the heat exchange section 131.

[0105] In some embodiments, the dimension of the heat exchange section 131 along the third direction Y is greater than the dimension of the bending section 1321 along the third direction Y. This increases the contact area between the heat exchange section 131 and the battery cell assembly 12, thereby increasing the heat exchange area between them and improving the heat exchange efficiency.

[0106] In this embodiment, on the one hand, the connecting section 132 is bent relative to the heat exchange section 131 by the bending section 1321, which can reduce the space occupied by the heat exchange tube 13 in the battery device 10 in the first direction X and improve the overall space utilization. On the other hand, the cross-section of the bending section 1321 is set as a circle. Compared with the rectangular cross-section, the bending radius of the circular tube is smaller, which further reduces the space occupation, and the bending angle is not limited, and the bending process is simple and easy to implement. Furthermore, in the third direction, the size of the heat exchange section 131 is larger, which can increase the heat exchange area between the heat exchange section 131 and the battery cell assembly 12 and improve the heat exchange efficiency.

[0107] In some embodiments, the heat exchange section 131 has a rectangular cross-section. Compared to a circle, the rectangular heat exchange section 131 can increase the heat exchange area between itself and the battery cell assembly 12, improve heat exchange efficiency, maintain the battery device 10 at a stable temperature, and improve the reliability of the battery device 10. Furthermore, the rectangular heat exchange section 131 can be obtained by directly flattening the portion of the circular heat exchange tube 13 located in the heat exchange section 131, which is simple in process and easy to form and process.

[0108] In some embodiments, the bent section 1321 is bent relative to the heat exchange section 131 along the second direction Y.

[0109] It should be understood that the bending direction of the bending segment 1321 along the second direction Z can be either the positive or negative direction of the second direction Z, and the bending direction of the bending segment 1321 along the third direction Y can be either the positive or negative direction of the third direction Y.

[0110] For example, the heat exchange section 131 is located on one side of the battery cell assembly 12 along the second direction Z, and the bending section 1321 can be bent toward the other side of the battery cell assembly 12 along the second direction Z, so that the connecting section 132 is housed within the size range of the battery cell assembly 12 in the second direction Z, thereby reducing the additional space occupied inside the housing 11 and improving space utilization.

[0111] The bending section 1321 bends relative to the heat exchange section 131 along the second direction Z, which can utilize the space in the battery device 10 along the second direction Z and further improve the overall space utilization.

[0112] In some embodiments, continue to refer to Figures 2 to 5 The connecting section 132 also includes an extension section 1322, which extends along a third direction Y. The bending section 1321 also bends relative to the extension section 1322 along a second direction Z to connect the heat exchange section 131 and the extension section 1322.

[0113] It should be understood that the bending section 1321 can be bent relative to the heat exchange section 131 along the second direction Z, and can also be bent relative to the extension section 1322 along the second direction Z, that is, the bending section 1321 bends twice consecutively. Specifically, the bending section 1321 bends relative to the heat exchange section 131 along the second direction Z and towards the extension section 1322, and continues to bend in the third direction Y, thereby connecting the heat exchange section 131 and the extension section 1322.

[0114] Extension segment 1322 can extend along a third party towards Y. Extension segment 1322 can extend along a third party in either the forward or reverse direction towards Y. For example, as... Figure 3 and Figure 4 As shown, one or more extension segments 1322 can extend in the positive direction of the third direction Y. For example, as... Figure 2 and 5 As shown, when the bent section 1321 is located relatively close to the left side inside the housing 11, the extension section 1322 can be bent in the opposite direction of the third direction Y relative to the bent section 1321 and extend in that direction, thereby extending the length of the extension section 1322 in the third direction Y; when the bent section 1321 is located relatively close to the right side inside the housing 11, the extension section 1322 can be bent in the forward direction of the third direction Y relative to the bent section 1321 and extend in that direction, thereby extending the length of the extension section 1322 in the third direction Y; when the bent section 1321 is located near the middle inside the housing 11, the extension section 1322 can be bent in the forward direction of the third direction Y relative to the bent section 1321 and extend, or it can be bent in the opposite direction of the third direction Y relative to the bent section 1321 and extend, thereby extending the length of the extension section 1322 in the third direction Y.

[0115] In this embodiment, the extension section 1322 extends along the third direction Y, thereby making reasonable use of the internal space of the battery device 10. The bending section 1321 undergoes two bends, which can better connect the heat exchange section 131 extending along the first direction X and the extension section 1322 extending along the third direction Y. Furthermore, the circular tube-shaped bending section 1321 has a small bending radius, which can more effectively utilize the arrangement space of the battery device 10 and improve the adaptability of the heat exchange system.

[0116] In some embodiments, the battery device 10 may further include a current collector 14, which may be used to communicate with the extension 1322 to deliver and / or recover the heat exchange medium to the heat exchange tube 13.

[0117] The manifold 14 can be used to input the heat exchange medium into the heat exchange tube 13, or to output the heat exchange medium in the heat exchange tube 13 to the manifold 14.

[0118] The heat exchange tube 13 is connected to the collector assembly 14. An opening matching the heat exchange tube 13 can be provided on the collector assembly 14. The heat exchange tube 13 and the opening of the collector assembly 14 are connected and communicated by welding or other means.

[0119] When the battery device 10 includes multiple heat exchange tubes 13, the current collector 14 can be connected to each heat exchange tube 13, thereby delivering the heat exchange medium to different heat exchange tubes 13 respectively, or collecting the heat exchange medium in different heat exchange tubes 13 into the current collector 14 and outputting it to the outside of the battery device 10.

[0120] In this embodiment, the current collector 14 can serve as a current collection point to exchange the heat exchange medium in the heat exchange tube 13 with the outside, thereby making the temperature of the heat exchange medium in the heat exchange tube 13 adjustable to meet the different heat exchange requirements of the battery device 10.

[0121] It should be understood that the position of the current collection component 14 can be adjusted according to the actual situation, and the embodiments of this application are not limited thereto.

[0122] It should be understood that the current collector 14 and the heat exchange tube 13 can be connected and fixed by means of adhesive bonding, hot melting, brazing, high frequency welding, induction welding, ultrasonic welding or sealing with a sealing ring, and the channels inside the current collector 14 are interconnected with the channels inside the heat exchange tube 13.

[0123] For example, in some embodiments, such as Figure 2 and Figure 5 As shown, the current collector 14 can be disposed on one side of the battery cell assembly 12 along the first direction X and connected to the heat exchange tube 13.

[0124] It should be understood that the current collector 14 can be disposed on any side of the battery cell assembly 12 along the first direction X, and is used to adjust the flow direction of the heat exchange medium. The current collector 14 can also be disposed on both sides of the battery cell assembly 12 along the first direction X, that is, the battery cell assembly 12 is provided with current collector 14 on both sides along the first direction X.

[0125] When the battery device 10 includes a plurality of battery cell assemblies 12 arranged along a third direction Y, the current collector 14 may be disposed on one or both sides of the plurality of battery cell assemblies 12 along the first direction X. Alternatively, the current collector 14 may be disposed on one or both sides of one or more battery cell assemblies 12 along the first direction X.

[0126] For example, in other embodiments, such as Figure 3 and Figure 4 As shown, the current collector 14 can also be disposed on one side of the battery cell assembly 12 along the third direction Y and connected to the heat exchange tube 13.

[0127] It should be understood that the current collector 14 can be set on any side of the battery cell assembly 12 along the third direction Y to adjust the flow direction of the heat exchange medium. The current collector 14 can also be set on both sides of the battery cell assembly 12 along the third direction Y, that is, the current collector 14 is set on both sides of the battery cell assembly 12 along the third direction Y.

[0128] When the battery device 10 includes a plurality of battery cell assemblies 12 arranged along a third direction Y, the current collector 14 may be disposed on one or both sides of the plurality of battery cell assemblies 12 along the third direction Y, or the current collector 14 may be disposed between two adjacent battery cell assemblies 12.

[0129] In some embodiments, taking a vehicle as an example, when the first direction X is the vehicle's direction of travel, the current collector 14 can be disposed on one side of the battery cell assembly 12 along the first direction X; when the third direction Y is the vehicle's direction of travel, the current collector 14 can be disposed on the side of the battery cell assembly 12 along the third direction Y. The battery device 10 often has more space along the vehicle's direction of travel to arrange other electrical components, thus allowing for a more rational arrangement of the current collector 14 and improving the overall space utilization of the battery device 10.

[0130] In some embodiments, such as Figure 3 and Figure 4 As shown, the current collector 14 is located on the side of the battery cell assembly 12 along the third direction Y.

[0131] Since multiple battery cells 20 in the battery cell assembly 12 are arranged along the first direction X, and the heat exchange section 131 also extends along the first direction X, by placing the current collector 14 on the side of the battery cell assembly 12 along the third direction Y, space in the battery device 10 can be saved in the first direction X to accommodate more battery cells 20, thereby increasing the energy density of the battery device 10. In particular, when the third direction is the vehicle's direction of travel, other electrical components in the battery device 10 are often placed on the side of the battery cell assembly 12 along the third direction Y. Placing the current collector 14 within the space where the electrical components are located allows for a more rational arrangement of the current collector 14, improving the overall space utilization of the battery device 10.

[0132] It should be understood that the heat exchange tube 13 can be connected to the manifold assembly 14 through the connecting section 132. Specifically, the heat exchange tube 13 is connected to the manifold assembly 14 through the extension section 1322 of the connecting section 132.

[0133] The heat exchange tube 13 may include multiple connecting sections 132, all of which are connected to the collector assembly 14. For example, the heat exchange tube 13 may include at least one first connecting section and at least one second connecting section, which are respectively connected to the collector assembly 14, thereby enabling the heat exchange medium to flow in the heat exchange tube 13 to achieve heat exchange with the battery cell assembly 12.

[0134] In some embodiments, continue to refer to Figures 2 to 5 The heat exchange tube 13 may include two connecting sections 132, which are respectively connected to both ends of the heat exchange section 131, and both connecting sections 132 are located on the same side of the heat exchange section 131 along the first direction X.

[0135] It should be understood that the two ends of the heat exchange section 131 can refer to the input end and the output end of the heat exchange section 131 through which the heat exchange medium passes in sequence. That is, the end where the heat exchange medium enters the heat exchange section 131 is the input end of the heat exchange section 131, and the end where the heat exchange medium exits the heat exchange section 131 is the output end.

[0136] For example, heat exchange section 131 may include a sub-heat exchange section extending along the first direction X. The two ends of the sub-heat exchange section along the first direction X are the input end and the output end of heat exchange section 131, and the two ends of the sub-heat exchange section along the first direction X are respectively connected to two connecting sections 132.

[0137] For example, heat exchange section 131 may include multiple sub-heat exchange sections arranged at intervals along the third direction Y. The beginnings and ends of two adjacent sub-heat exchange sections can be connected sequentially through transition sections to form a complete heat exchange section 131 that can supply heat exchange medium. The sub-heat exchange sections closest to the outermost sides along the third direction Y are the first sub-heat exchange section and the second sub-heat exchange section, respectively. The ends of the first and second sub-heat exchange sections that are furthest from the sub-heat exchange sections they are connected to are the input end and the output end of heat exchange section 131, respectively. Two connecting sections 132 are connected to the input end and the output end, respectively.

[0138] The two connecting sections 132 cooperate with each other to enable the heat exchange medium to flow inside the heat exchange tube 13.

[0139] For example, the first connection section 132 of the two connection sections 132 can be used to input the heat exchange medium, and the second connection section 132 can be used to output the heat exchange medium. That is, the heat exchange medium is input from the first connection section 132, passes through the heat exchange section 131, and is output from the second connection section 132, thereby realizing the flow of the heat exchange medium.

[0140] For example, the second connection section 132 of the two connection sections 132 can be used to input the heat exchange medium, and the first connection section 132 can be used to output the heat exchange medium. That is, the heat exchange medium is input from the second connection section 132, passes through the heat exchange section 131, and is output from the first connection section 132, thereby realizing the flow of the heat exchange medium.

[0141] It should be understood that the input and output ends of the heat exchange section 131 can be located on the same side of the heat exchange section 131 along the first direction X, or they can be located on different sides of the heat exchange section 131 along the first direction X.

[0142] For example, if heat exchange section 131 includes only one sub-heat exchange section, the input and output ends of heat exchange section 131 are located on opposite sides of heat exchange section 131 along the first direction X. As another example, if heat exchange section 131 includes two sub-heat exchange sections, the two sub-heat exchange sections are connected at the same end along the first direction X via a transition section, and their other ends are the input and output ends of heat exchange section 131, respectively. That is, if the number of sub-heat exchange sections is odd, the input and output ends of heat exchange section 131 can be located on different sides of the first direction X; if the number of sub-heat exchange sections is even, the input and output ends of heat exchange section 131 can be located on the same side of the first direction X.

[0143] In this embodiment of the application, by setting the two connecting sections 132 in the heat exchange tube 13 to be located on the same side of the heat exchange section 131 along the first direction X, the heat exchange medium can be uniformly input and output from one side, making the overall layout of the heat exchange structure more compact and further improving the space utilization of the battery device 10.

[0144] In some embodiments, such as Figure 3 and Figure 4 As shown, the extension segments 1322 of the two connecting segments 132 are arranged sequentially along the second direction Z.

[0145] It should be understood that, in the case of multiple heat exchange tubes 13, one or more extensions 1322 of the multiple heat exchange tubes 13 may also be arranged sequentially along the second direction Z.

[0146] For example, with Figure 4 Taking the battery device 10 shown as an example with two heat exchange tubes 13, the two heat exchange tubes 13 are arranged sequentially along the third direction Y. Then, the four extension sections 1322 can all extend along the third direction Y in the direction close to the current collector 14, and the four extension sections 1322 can be arranged sequentially along the second direction Z, so that the four extension sections 1322 can utilize the space of the battery cell 20 in the height direction, thereby improving the overall space utilization of the battery device 10.

[0147] For example, with Figure 5Taking the battery device 10 shown as an example with two heat exchange tubes 13, the two heat exchange tubes 13 are arranged sequentially along a third direction Y. The two extension segments 1322 of the first heat exchange tube 13 can be arranged sequentially along a second direction Z, and the two extension segments 1322 of the second heat exchange tube 13 can also be arranged sequentially along a second direction Z. Furthermore, the extension segment 1322 of the first heat exchange tube 13 connected to the input end of the heat exchange section 131 is flush with the extension segment 1322 of the second heat exchange tube 13 connected to the input end of the heat exchange section 131 in the second direction Z. Similarly, the extension segment 1322 of the first heat exchange tube 13 connected to the output end of the heat exchange section 131 is flush with the extension segment 1322 of the second heat exchange tube 13 connected to the output end of the heat exchange section 131 in the second direction Z. This allows all four extension segments 1322 to utilize the space of the battery cell 20 in the height direction, thereby improving the overall space utilization of the battery device 10.

[0148] Figure 6 As shown Figure 4 The diagram shows a partial front view of the battery device 10 along the first direction X. In some embodiments, such as... Figure 3 and Figure 6 As shown, when the current collector 14 is located on the side of the battery cell assembly 12 along the third direction Y, the height of the current collector 14 along the second direction Z is lower than the height of the battery cell 20 along the second direction Z. Thus, one or more extensions 1322 in the heat exchange tube 13 can be bent along the second direction Z towards the current collector 14, thereby communicating with the current collector 14.

[0149] Figure 7 As shown Figure 5 The diagram shows a partial front view of the battery device 10 along the first direction X. In some embodiments, such as... Figure 7 As shown, when the current collector 14 is disposed on one side of the battery cell assembly 12 along the first direction X, the extensions 1322 of the two connecting segments 132 can extend along the third direction Y towards the current collector 14, thereby communicating with the current collector 14.

[0150] Figure 8 As shown Figure 4 The diagram shows the structure of the current collection component 14. In some embodiments, such as... Figures 3 to 8 As shown, the current collection assembly 14 includes a first current collection cavity 141 and a second current collection cavity 142 that are isolated from each other. The first current collection cavity 141 and the second current collection cavity 142 are respectively connected to the extensions 1322 of the two connecting sections 132.

[0151] It should be understood that the first manifold 141 and the second manifold 142 are isolated from each other, meaning that the first manifold 141 and the second manifold 142 are not connected, that is, the heat exchange medium in the first manifold 141 cannot directly flow with the heat exchange medium in the second manifold 142.

[0152] The first collection chamber 141 and the second collection chamber 142 can be two independent components, or they can be a whole, with the collection assembly 14 divided into two chambers by a liquid separator or other structure.

[0153] The first collector cavity 141 and the second collector cavity 142 are respectively connected to the extensions 1322 of the two connecting sections 132. That is, the first collector cavity 141 can be connected to the extension 1322 of the first connecting section 132, and the second collector cavity 142 can be connected to the extension 1322 of the second connecting section 132. Alternatively, the first collector cavity 141 can be connected to the extension 1322 of the second connecting section 132, and the second collector cavity 142 can be connected to the extension 1322 of the first connecting section 132.

[0154] The heat exchange medium flows in different directions in the first collector cavity 141 and the second collector cavity 142. Therefore, by connecting one extension section 1322 of the heat exchange tube 13 to the first collector cavity 141 and the other extension section 1322 of the heat exchange tube 13 to the second collector cavity 142, a complete heat exchange medium circuit can be formed in the battery device 10, thereby improving the heat exchange efficiency.

[0155] In the case of multiple heat exchange tubes 13, in order to accelerate the flow of the heat exchange medium and improve the heat exchange efficiency, the first connecting section 132 of each heat exchange tube 13 can be connected to the first collecting cavity 141 of the collecting assembly 14, and the second connecting section 132 of each heat exchange tube 13 can be connected to the second collecting cavity 142 of the collecting assembly 14. For details, please refer to... Figure 4 or Figure 5 The embodiment shown here has two heat exchange tubes 13, which will not be described in detail here.

[0156] In some embodiments, the first current collector 141 and the second current collector 142 may be arranged along the second direction Z. This allows for the utilization of the space in the height direction of the battery device 10, reduces the space occupied by the current collector assembly 14, and improves space utilization.

[0157] In some embodiments, continue to refer to Figure 8 The current collection assembly 14 has a cavity structure. The current collection assembly 14 also includes a partition plate 143. The partition plate 143 is disposed in the cavity of the current collection assembly 14 and divides the current collection assembly 14 into a first current collection cavity 141 and a second current collection cavity 142.

[0158] In this embodiment, the first current collection cavity 141 and the second current collection cavity 142 are integrated as a whole, which can further save the space occupied by the current collection component 14, and at the same time reduce the material of the current collection component 14 and reduce the processing cost.

[0159] In some embodiments, continue to refer to Figure 5 and Figure 7 The first collector cavity 141 and the second collector cavity 142 are separate structures, that is, the first collector cavity 141 and the second collector cavity 142 are set independently.

[0160] In some embodiments, the first manifold 141 is located inside the housing 11 in a region along the third direction Y near the side wall of the housing 11.

[0161] It should be understood that the first manifold 141 can be located near either of the two side walls of the housing 11 that are perpendicular to the third direction Y. For example, as Figure 7 As shown, the first flow-collecting cavity 141 can be located inside the housing 11 in a region near the right side wall perpendicular to the third direction Y. Alternatively, the first flow-collecting cavity 141 can also be located inside the housing 11 in a region near the left side wall perpendicular to the third direction Y. The specific location of the first flow-collecting cavity 141 can be adjusted according to the actual spatial arrangement, and this embodiment is not limited thereto.

[0162] In this embodiment, the first current collection cavity 141 is located inside the housing 11 along the third direction Y near the side wall, that is, the first current collection cavity 141 is located near the edge of the housing 11. This can avoid the first current collection cavity 141 occupying other space inside the housing 11, optimize the spatial layout inside the housing 11, and improve the overall space utilization of the battery device 10.

[0163] The first collector cavity 141 can extend along a third direction Y to better communicate with the extension section 1322. Alternatively, the extension section 1322 can extend along a third direction Y to communicate with the first collector cavity 141, thereby reducing the size of the first collector cavity 141.

[0164] In some embodiments, on the third-party direction Y, the size of the first collector cavity 141 is less than or equal to a first threshold.

[0165] It should be understood that the first threshold can be a relatively small positive value, thereby ensuring that the first manifold 141 is maintained at a relatively small size. The first threshold should be at least smaller than the internal dimension of the housing 11 along the third direction Y, so that the first manifold 141 can be accommodated within the housing 11. For example, the first threshold can be one-third or one-quarter of the internal dimension of the housing 11 along the third direction Y, and the specific value of the first threshold can be flexibly adjusted according to the actual use and the size of the housing 11.

[0166] In some embodiments, on the third-party direction Y, the size L of the first manifold 141 is less than or equal to one-third of the size of the housing 11.

[0167] It should be understood that the dimensions of the housing 11 refer to the minimum distance between the side walls of the housing 11 perpendicular to the third direction Y in the third direction Y.

[0168] In this embodiment, by limiting the size of the first manifold 141 in the third direction Y to a small range, it can be flexibly adjusted according to the position of other components inside the housing 11, avoiding positional interference between the first manifold 141 and other components, and making better use of the space inside the housing 11. Furthermore, the smaller size of the first manifold 141 makes it easier to manufacture and connect to the heat exchange tube 13. For example, the first manifold 141 can be connected to the heat exchange tube 13 by partial welding, thereby improving manufacturing efficiency.

[0169] The second manifold 142 can be located on either side of the heat exchange tube 13 along the first direction X and communicate with the heat exchange tube 13. For example, the second manifold 142 can be located on the side of the heat exchange tube 13 along the first direction X near the connecting section 132, thereby communicating with the connecting section 132. The second manifold 142 can supply heat exchange medium to the connecting section 132, or collect heat exchange medium from the connecting section 132 and output it to the outside of the battery device 10. It should be understood that the arrangement of the second manifold 142 is similar to that of the first manifold 141, and will not be described again here.

[0170] In some embodiments, the first current collector 141 and the second current collector 142 are arranged sequentially along the second direction Z. In this way, the current collector assembly 14 can be arranged in the space of the second direction Z, thereby further improving the space utilization rate inside the housing 11 and increasing the energy density of the battery device 10.

[0171] In the second direction Z, the first collector cavity 141 can be positioned near the top of the second collector cavity 142, where the second direction Z is the direction of gravity. The heat exchange medium enters the heat exchange tube 13 from the first collector cavity 141 and exits from the second collector cavity 142. This creates a certain height difference between the input and output ends of the heat exchange medium. Under the action of gravity, this promotes the flow of the heat exchange medium within the heat exchange tube 13, increases the heat exchange rate of the heat exchange tube 13, and thus improves the heat exchange performance of the battery device 10.

[0172] Figure 9 A partially enlarged view of a portion of the structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 9 As shown Figure 4 A partial enlarged view of part A of the structure of the battery device 10 shown. In some embodiments, such as Figure 9 As shown, the heat exchange tube 13 also includes a transition section 133, which is used to connect the heat exchange section 131 and the connecting section 132. The size of the transition section 133 along the second direction Z gradually decreases from the end near the connecting section 132 to the end near the heat exchange section 131.

[0173] The transition section 133 connects the connecting section 132 and the heat exchange section 131, so that the heat exchange medium can pass through at any position in the entire heat exchange tube 13.

[0174] The heat exchange tube 13 may include one or more connecting sections 132, and correspondingly, the heat exchange tube 13 may also include one or more transition sections 133. For example, the heat exchange tube 13 may include two connecting sections 132 and two transition sections 133. The two connecting sections 132 are located at the inlet and outlet of the heat exchange tube 13, respectively. One transition section 133 connects the heat exchange section 131 and the connecting section 132 located at the inlet of the heat exchange tube 13, and the other transition section 133 connects the heat exchange section 131 and the connecting section 132 located at the outlet of the heat exchange tube 13.

[0175] The transition section 133 serves as a bridge between the connecting section 132 and the heat exchange section 131. The dimension of the transition section 133 along the second direction Z gradually decreases from the end near the connecting section 132 to the end near the heat exchange section 131, while the dimension of the transition section 133 along the third direction Y gradually increases from the end near the connecting section 132 to the end near the heat exchange section 131. This results in the heat exchange section 131 forming a shape similar to a flat tube, thereby increasing the heat exchange area between the heat exchange section 131 and the battery cell assembly 12.

[0176] In this embodiment, by providing a transition section 133, the connecting section 132 and the heat exchange section 131 can be smoothly connected, reducing turbulence caused by inconsistencies in size or shape between the connecting section 132 and the heat exchange section 131, reducing pressure drop, and improving the circulation efficiency of the heat exchange medium. Furthermore, in the second direction Z, the size of the transition section 133 gradually decreases, making the size of the heat exchange section 131 in the second direction Z smaller than the size of the connecting section 132 in the second direction Z. Correspondingly, the size of the heat exchange section 131 in the third direction Y is larger than the size of the connecting section 132 in the third direction Y. This reduces the space occupied by the heat exchange section 131 while increasing the heat exchange area between the heat exchange section 131 and the battery cell assembly 12, thereby improving heat exchange efficiency.

[0177] The heat exchange tube 13 can be a split structure, formed by welding the split parts together. Alternatively, the heat exchange tube 13 can be integrally extruded; for example, it can be formed by extruding and bending a circular tube. Compared to split connections, this reduces the sealing surface area, thereby improving sealing performance. Furthermore, the integral extrusion and bending process is simpler and more convenient, improving processing efficiency.

[0178] The inner wall of the heat exchange tube 13 may be provided with structures such as serrations, fins, honeycomb, and spiral patterns to increase the heat exchange area and improve the heat exchange effect. For example, serrations, fins, honeycomb, and spiral patterns may be provided on any inner wall of the heat exchange tube 13, or on all inner walls of the heat exchange tube 13. This application does not impose any limitation on this.

[0179] In some embodiments, the heat exchange tube 13 can be formed by a one-piece molding process, that is, the connecting section 132, the transition section 133, and the heat exchange section 131 are formed as a single piece. Specifically, the one-piece molding process can include injection molding, die casting, blow molding, compression molding, 3D printing, rotation, extrusion, or a combination of multiple methods.

[0180] In some embodiments, the connecting section 132, the transition section 133, and the heat exchange section 131 are integrally extruded from a hollow circular tube.

[0181] The connecting section 132 maintains a circular tube shape and connects to the current collector 14 after bending. The heat exchange section 131 forms a flat tube, thereby increasing the contact area between the heat exchange section 131 and the battery cell assembly 12 and improving heat dissipation performance. The transition section 133 gradually transitions from the circular tube of the connecting section 132 to the flat tube of the heat exchange section 131.

[0182] In this embodiment, on the one hand, the integrally extruded connecting section 132 maintains a circular tube shape and is connected to the current collector 14 after bending. Its bending radius is small, which can avoid occupying too much space. Moreover, the bending process is simple and easy to implement, and it can be bent in different directions to adapt to the current collector 14 at different positions. The heat exchange section 131 is formed into a flat tube shape, thereby increasing the contact area between the heat exchange section 131 and the battery cell assembly 12, improving heat dissipation performance, and also improving the bonding strength when the heat exchange section 131 is bonded to other components. On the other hand, the connecting section 132, the transition section 133, and the heat exchange section 131 are directly integrally extruded from a hollow circular tube, which can reduce seams and welding points, reduce the risk of leakage of the heat exchange tube 13, and the integral extrusion method is simple to process, which can save materials and reduce costs.

[0183] In some embodiments, continue to refer to Figures 2 to 9 The battery device 10 may also include a liquid supply sleeve 151 and a liquid drain sleeve 152. The liquid supply sleeve 151 is connected to the first collection chamber 141, and the liquid drain sleeve 152 is connected to the second collection chamber 142.

[0184] It should be understood that the liquid supply sleeve 151 is connected to the first collection chamber 141, and the liquid discharge sleeve 152 is connected to the second collection chamber 142. That is, the heat exchange medium enters from the liquid supply sleeve 151 and flows into the first collection chamber 141. The heat exchange medium entering the first collection chamber 141 enters the heat exchange tube 13 for heat exchange. The heat exchange tube 13 is connected to the second collection chamber 142. The heat exchange medium flows out from the heat exchange tube 13 and enters the second collection chamber 142, and finally flows out from the liquid discharge sleeve 152 to realize the heat exchange of the battery device 10.

[0185] Optionally, the first collection chamber 141 can be connected to the drain sleeve 152, and the second collection chamber 142 can be connected to the supply sleeve 151. The heat exchange medium enters from the second collection chamber 142, flows into the heat exchange tube 13 through the connecting section 132 for heat exchange, and the heat exchange medium flowing out from the heat exchange tube 13 flows out from the first collection chamber 141 and then flows out from the drain sleeve 152 to achieve overall heat exchange.

[0186] It should be understood that the liquid supply sleeve 151 and the liquid discharge sleeve 152 can be made of high-strength metal materials and connected to the manifold 14 by welding, threaded connection or other means.

[0187] The liquid supply sleeve 151 is connected to the first collection chamber 141, and the liquid discharge sleeve 152 is connected to the second collection chamber 142. This can optimize the fluid distribution of the heat exchange medium and increase the flow rate, accelerate the flow of the heat exchange medium, and improve the heat exchange efficiency.

[0188] In some embodiments, the battery device 10 may further include a flange connected to the supply sleeve 151 and / or the drain sleeve 152 to control the inflow and outflow of the heat exchange medium.

[0189] The flange can also be connected to a liquid storage tank, which can be located inside or outside the battery device 10. The flange can be used to provide and refresh the heat exchange medium for the heat exchange tube 13.

[0190] The battery device 10 may include one or more heat exchange tubes 13. For example, the battery device 10 may include multiple heat exchange tubes 13, which are spaced apart along a third direction Y. The first connecting section 132 of the multiple heat exchange tubes 13 is connected to the first collection cavity 141, and the connecting section 132 of the multiple heat exchange tubes 13 is connected to the second collection cavity 142.

[0191] For example, the battery device 10 may include a plurality of heat exchange tubes 13, each heat exchange tube 13 including a plurality of sub-heat exchange sections, the plurality of sub-heat exchange sections of the plurality of heat exchange tubes 13 being staggered along the third direction Y, so that one or more heat exchange tubes 13 are correspondingly arranged on one side of each battery cell 20 along the second direction Z, and the temperature of all battery cells 20 is regulated by using the plurality of heat exchange tubes 13.

[0192] For example, in some embodiments, the battery device 10 may include two heat exchange tubes 13, the heat exchange medium input ends of the two heat exchange tubes 13 being located in the regions of the housing 11 along the third direction Y near the two side walls of the housing 11, the extension sections 1322 of the two heat exchange tubes 13 near the input ends being bent and extended relative to the corresponding bending sections 1321 along the third direction Y in a direction that approaches each other, and the two ends of the first collector cavity 141 along the third direction Y are respectively connected to the extension sections 1322 of the two heat exchange tubes 13.

[0193] In this embodiment, the first collector cavity 141 is connected to the extension section 1322 at both ends along the third direction Y, so that the heat exchange medium can be input from the two ends of the first collector cavity 141 along the third direction Y through the extension section 1322 to the bending section 1321 near both sides. Compared with the heat exchange medium being input from one side, the upstream and downstream temperature difference can be reduced, local overheating can be avoided, and the overall temperature uniformity performance of the battery device 10 can be improved.

[0194] In some embodiments, the connection segment 132 at the output ends of the two heat exchange tubes 13 is located in the region inside the housing 11 along the third direction Y, close to the middle.

[0195] When there are two heat exchange tubes 13, the connection section 132 near the output end of the heat exchange tube 13 can be connected to the second collection cavity 142 in different ways.

[0196] For example, the connecting sections 132 of the two heat exchange tubes 13 near their output ends can be directly connected to the second manifold 142, that is, the two connecting sections 132 are directly connected to the second manifold 142 along the first direction X. Specifically, two openings corresponding to the connecting sections 132 are respectively opened on the side wall of the second manifold 142 perpendicular to the first direction X and near the connecting sections 132. The connecting sections 132 of the two heat exchange tubes 13 are respectively inserted into the two openings, and a sealed connection is achieved by welding rings or other methods.

[0197] For example, the connecting section 132 may include a bent section 1321, which bends relative to the heat exchange section 131 along the second direction Z. The connecting section 132 communicates with the second collection cavity 142 through the bent section 1321. The second collection cavity 142 has two openings on its sidewall perpendicular to the second direction Z and close to the bent section 1321, corresponding to the bent section 1321. The bent sections 1321 of the two heat exchange tubes 13 are inserted into the two openings respectively, and a sealed connection is achieved by welding with welding rings or other methods.

[0198] For example, the connecting section 132 may include a bent section 1321 and an extension section 1322, wherein the bent section 1321 is bent relative to the heat exchange section 131 along a second direction Z, and the extension section 1322 is bent relative to the bent section 1321 along a third direction Y. Figure 7 As shown, the second manifold 142 can be located in the middle of the extensions 1322 of the two heat exchange tubes 13 along the third direction Y. The two extensions 1322 are bent relative to the corresponding bends 1321 along the third direction Y and in a direction close to each other. The two ends of the second manifold 142 along the third direction Y are respectively connected to the two extensions 1322. Alternatively, the second manifold 142 can be located on the same side of the two extensions 1322 along the third direction Y. The two extensions 1322 are respectively bent relative to the corresponding bends 1321 along the third direction Y and in a direction close to the second manifold 142. The two extensions 1322 are inserted into the two openings of the second manifold 142 facing the two extensions 1322 along the third direction Y and are sealed and connected by welding rings or other methods.

[0199] In this embodiment, the connecting section 132 is located near the middle of the Y direction, meaning the heat exchange medium is output from the middle. This shortens the flow path of the heat exchange medium, reduces the pressure drop between the input and output ends of the heat exchange tube 13, and improves the heat exchange efficiency.

[0200] It should be understood that the specific configuration of the heat exchange tube 13 and the manifold assembly 14 in the embodiments of this application can be adjusted according to actual conditions. For example, the heat exchange tube 13 may only include a heat exchange section 131, which is directly connected to the manifold assembly 14. Alternatively, the heat exchange tube 13 may only include a heat exchange section 131 and a bend section 1321, with the heat exchange section 131 connected to the manifold assembly 14 via the bend section 1321. Yet another example, the heat exchange tube 13 may only include a heat exchange section 131 and an extension section 1322, with the heat exchange section 131 connected to the manifold assembly 14 via the extension section 1322.

[0201] Optionally, based on some embodiments of this application, reference may continue to be made to... Figures 2 to 9 As described above, the battery device 10 also includes a heat-conducting plate 16, which is disposed on one side of the battery cell assembly 12 along the second direction Z, and at least one heat exchange section 131 is provided on the side of the heat-conducting plate 16 away from the battery cell assembly 12.

[0202] It should be understood that the heat-conducting plate 16 is located on one side of the battery cell assembly 12 along the second direction Z, which can be divided into two cases:

[0203] In one scenario, the heat-conducting plate 16 can be positioned on the side of the battery cell assembly 12 along the second direction Z and close to the bottom of the housing 11. In this case, the heat-conducting plate 16 can not only conduct heat to the heat exchange medium in the heat exchange section 131, but also support the weight of the battery cell assembly 12.

[0204] In another scenario, the heat-conducting plate 16 can be disposed on the side of the battery cell assembly 12 along the second direction Z and away from the bottom of the housing 11. In this case, the heat-conducting plate 16 conducts uniform heat to the heat exchange medium in the heat exchange section 131.

[0205] A heat exchange tube 13 may be provided on the side of the heat-conducting plate 16 away from the battery cell assembly 12. When the heat exchange assembly includes multiple spaced heat-conducting plates 16, a heat exchange section 131 is provided on the side of each heat-conducting plate 16 away from the battery cell assembly 12, and the heat exchange sections 131 are connected to each other for heat exchange.

[0206] Two heat exchange sections 131 can also be provided on the side of the heat-conducting plate 16 away from the battery cell assembly 12. The two heat exchange sections 131 can be directly connected or connected through other pipes. Providing two heat exchange sections 131 on the side of the heat-conducting plate 16 away from the battery cell assembly 12 can achieve better heat exchange effect.

[0207] It should be understood that multiple heat exchange sections 131 can be provided on a single heat-conducting plate 16 to further improve the heat exchange effect. The specific number of heat exchange sections 131 can be set according to the actual situation, and this application does not impose any restrictions on this.

[0208] Multiple heat exchange sections 131 each have a flow channel through which the heat exchange medium passes, wherein the heat exchange medium is used to regulate the temperature of the battery cell assembly 12.

[0209] The heat-conducting plate 16 and the heat exchange section 131 are thermally connected. A layer of thermally conductive structural adhesive can be applied between the heat exchange section 131 and the heat-conducting plate 16, and the two can be fixed together by bonding. The thermally conductive structural adhesive has high thermal conductivity and can quickly transfer heat between the heat exchange section 131 and the heat-conducting plate 16. It should be understood that the heat exchange section 131 and the heat-conducting plate 16 can also be thermally connected by other methods such as welding, and this application does not limit this in any way.

[0210] It should be understood that the heat-conducting plate 16 can also be called a heat spreader. The heat-conducting plate 16 is used for heat transfer, to distribute heat evenly, and to reduce local overheating or overcooling. The material of the heat-conducting plate 16 can be a metal with high thermal conductivity, such as copper or aluminum, etc. The heat-conducting plate 16 can also be other materials, and this application does not limit it in any way.

[0211] In this embodiment of the application, by setting the heat-conducting plate 16, it is possible to avoid local overheating or overcooling of the battery cell assembly 12 and improve the overall heat distribution balance of the battery cell assembly 12.

[0212] In some embodiments, the battery device 10 may include a plurality of battery cell assemblies 12 arranged along a third direction Y, and a plurality of heat-conducting plates 16 spaced apart along a third direction Y. The plurality of heat-conducting plates 16 extend along a first direction X, and two adjacent battery cell assemblies 12 abut against the same heat-conducting plate 16.

[0213] It should be understood that the battery cell assembly 12 can be placed directly on the heat-conducting plate 16, or the battery cell assembly 12 can be thermally connected to the heat-conducting plate 16.

[0214] For example, a layer of thermally conductive structural adhesive can be applied between the battery cell assembly 12 and the heat-conducting plate 16 to bond them together. The thermally conductive structural adhesive has high thermal conductivity, enabling it to rapidly transfer the heat generated by the battery cells 20 in the battery cell assembly 12 to the heat-conducting plate 16. Simultaneously, the thermally conductive structural adhesive provides structural support, enhancing the connection stability between the thermally conductive structural adhesive and the heat-conducting plate 16. It should be understood that the battery cell assembly 12 and the heat-conducting plate 16 can also be thermally connected in other ways, and this application does not impose any limitations on this.

[0215] In this embodiment, multiple heat-conducting plates 16 are spaced apart along the third direction Y. Compared with a single heat-conducting plate 16, this can save materials and improve the overall energy density of the battery device 10. In addition, the heat-conducting plates 16 can also support the weight of the battery cell assembly 12, simplifying the overall structure and weight of the battery device 10.

[0216] In some embodiments, the heat-conducting plate 16 may be omitted, and only the heat exchange section 131 may be provided. The heat exchange section 131 is provided at one end of the battery cell assembly 12 along the second direction Z to achieve heat exchange.

[0217] The shape of the heat-conducting plate 16 can be a solid cuboid, a hollow cuboid, or other irregular shapes. This application does not impose any limitations on this.

[0218] Optionally, based on some embodiments of this application, reference may continue to be made to... Figures 2 to 9 As described above, the battery device 10 also includes an insulating portion 17, which extends along a first direction X and is disposed at both ends of the heat-conducting plate 16 along a third direction Y.

[0219] Insulating portions 17 are disposed at both ends of the heat-conducting plate 16 along the third direction Y. The following examples all assume that the battery device 10 includes multiple heat-conducting plates 16 arranged along the third direction Y. The following situations can be categorized as follows:

[0220] In one scenario, the insulating portion 17 is disposed at both ends of the heat-conducting plate 16 along the third direction Y and is perpendicular to the second direction Z. At the same time, the insulating portion 17 faces the receiving space. When the battery cell 20 is connected to the heat-conducting plate 16, the insulating plate can reduce the contact between the electrode terminals and the heat-conducting plate 16, thereby reducing the risk of safety problems.

[0221] In another scenario, the insulating portion 17 is disposed at both ends of the heat-conducting plate 16 along the third direction Y and is perpendicular to the second direction Z. At the same time, the insulating portion 17 is far away from the receiving space. When the battery cell 20 is connected to the heat-conducting plate 16, the insulating plate can reduce the contact between the electrode terminals and the heat-conducting plate 16, thereby reducing the risk of safety problems.

[0222] In another scenario, the insulating portion 17 is disposed at both ends of the heat-conducting plate 16 along the third direction Y and is perpendicular to the third direction Y. When the battery cell 20 is connected to the heat-conducting plate 16, the insulating portion 17 can reduce the contact between the electrode terminals and the heat-conducting plate 16, thereby reducing the risk of safety problems.

[0223] It should be understood that the above three situations can be combined in pairs or in threes to form the insulating part 17, further reducing the contact between the heat-conducting plate 16 and the electrode terminals in the battery cell 20.

[0224] Furthermore, the insulating portion 17 extends along the first direction X. The dimension of the insulating portion 17 along the first direction X can be the same as the length of the heat-conducting plate 16 along the first direction X, to better achieve contact between the heat-conducting plate 16 and the electrode terminals. Alternatively, the dimension of the insulating portion 17 along the first direction X can be smaller than the length of the heat-conducting plate 16 along the first direction X. This means that the insulating layer can be provided only in the area of ​​the heat-conducting plate 16 where it may contact the electrode terminals. This design reduces the contact area between the heat-conducting plate 16 and the electrode terminals while also saving material and improving overall space utilization.

[0225] Optionally, if the heat-conducting plate 16 is a single large plate, the heat-conducting plate 16 is disposed on one side of the battery cell assembly 12 along the second direction Z. In this case, the insulating part 17 may only be disposed at both ends along the third direction Y, or the insulating part 17 may be disposed in the area where the electrode terminal is connected to the entire heat-conducting plate 16, or insulating glue may be applied, etc. This application does not impose any limitations on this.

[0226] The insulating portion 17 can be a polymer, such as a thermosetting plastic, or a ceramic material, etc., and this application does not limit it in any way. Alternatively, the insulating portion 17 can be achieved by coating on the heat-conducting plate 16, thereby achieving insulation between the electrode terminals of the battery cell 20 and the heat-conducting plate 16.

[0227] In this embodiment, the insulating portion 17 extends along the first direction X and is disposed at both ends of the heat-conducting plate 16 along the third direction Y. When the battery cell 20 is connected to the heat-conducting plate 16, the insulating portion 17 can reduce the conductive connection between the electrode terminals of the battery cell 20 and the heat-conducting plate 16, thus reducing the risk of safety issues. Therefore, the insulating portion 17 can improve the safety performance of the battery device 10.

[0228] Optionally, based on some embodiments of this application, reference may continue to be made to... Figures 2 to 9 As described, the insulating part 17 includes a first insulating part and a second insulating part. The first insulating part is perpendicular to the second direction Z and abuts against the battery cell 20. The second insulating part is connected to the first insulating part and is bent relative to the first insulating part.

[0229] The first insulating part abuts against the battery cell 20, that is, the first insulating part abuts against one or two battery cells 20 on the outermost side of the battery cell assembly 12 along the third direction Y.

[0230] The first insulating part and the second insulating part are connected and bent relative to each other, that is, the plane containing the first insulating part and the plane containing the second insulating part form a certain angle, which can be an acute angle, a right angle, or an obtuse angle. For example, the plane containing the first insulating part and the plane containing the second insulating part form a right angle, that is, the second insulating part is perpendicular to the first insulating part.

[0231] It should be understood that the second insulating portion can be located at either end of the first insulating portion. For example, the second insulating portion can be located at the upper end of the first insulating portion along the second direction Z, or the second insulating portion can be located at the lower end of the first insulating portion along the second direction Z, so that the first insulating portion and the second insulating portion are L-shaped or inverted L-shaped in this cross section.

[0232] The first and second insulating portions can also extend along the third direction Y, thereby increasing the rigidity of the heat-conducting plate 16 and improving the overall stability of the battery device 10.

[0233] It should be understood that the first insulating part and the second insulating part can be formed by bending a sheet or by stamping, etc., and the embodiments of this application are not limited to these.

[0234] In this embodiment, the first insulating part is perpendicular to the second direction Z and abuts against the battery cell 20. While improving the safety performance of the battery device 10, the second insulating part is connected to the first insulating part and is bent relative to the first insulating part, which can further reduce the contact between the electrode terminals of the battery cell 20 and the heat-conducting plate 16, thereby further improving the safety performance of the battery device 10.

[0235] Optionally, in some embodiments, the insulating portion 17 further includes a third insulating portion, which is connected to the first insulating portion and bent relative to the first insulating portion, and is disposed opposite to and spaced apart from the second insulating portion.

[0236] The third insulating part is connected to the first insulating part and is bent relative to it. The third insulating part is opposite to the second insulating part and is spaced apart. That is, the plane where the third insulating part is located and the plane where the second insulating part is located are both perpendicular to the plane where the first insulating part is located. The first insulating part is located at the common end of the second insulating part and the third insulating part along the third direction Y.

[0237] The third insulating portion and the second insulating portion can be located at opposite ends of the first insulating portion. For example, the second insulating portion can be located at the upper end of the first insulating portion along the second direction Z, and the third insulating portion can be located at the lower end of the first insulating portion along the second direction Z, so that the first insulating portion, the second insulating portion and the third insulating portion form a C-shape in this cross section.

[0238] It should be understood that the first insulating part, the second insulating part, and the third insulating part can be formed by bending a sheet or by stamping, etc., and the embodiments of this application are not limited to these.

[0239] In this embodiment, by providing a third insulating part, the structural stability of the heat-conducting plate 16 can be enhanced. In addition, the insulation performance between the heat-conducting plate 16 and the electrode terminals in the battery cell 20 can be better achieved, thereby improving the overall performance of the battery device 10.

[0240] Based on some embodiments of this application, further reference can be made. Figures 2 to 9 As described, the housing 11 may include a limiting member 111, which is disposed at one end of the battery cell assembly 12 along a first direction X, and extends along a third direction Y to abut against a plurality of battery cell assemblies 12.

[0241] It should be understood that the limiting member 111 is positioned in the arrangement direction of the multiple battery cells 20. For example... Figure 2 As shown, in the battery cell assembly 12, multiple battery cells 20 are arranged along the width direction of the housing 11, and the limiting member 111 is provided on one side of the battery cell assembly 12 along the width direction of the housing 11. Figure 3 As shown, multiple battery cells 20 in the battery cell assembly 12 are arranged along the length of the housing 11, and the limiting member 111 is provided on one side of the battery cell assembly 12 along the length of the housing 11.

[0242] The limiting member 111 can be set at any one or both ends of the battery cell assembly 12 along the first direction X, and the limiting member 111 extends along the third direction Y, thereby abutting against multiple battery cell assemblies 12.

[0243] In this embodiment of the application, by setting the limiting member 111, the expansion force generated by the battery cell 20 can be resisted, thereby improving the overall stability of the battery device 10.

[0244] In some embodiments, the current collection assembly 14 can be connected to the limiting member 111, so that the current collection assembly 14 is placed securely inside the housing 11, reducing the risk of connection failure between the current collection assembly 14 and the heat exchange tube 13 due to external impact or shaking.

[0245] In some embodiments, the heat-conducting plate 16 may be connected to the limiting members. Specifically, the battery cell assembly 12 is provided with limiting members at both ends along the first direction X, and the heat-conducting plate 16 is connected to the two limiting members at both ends along the first direction X.

[0246] The heat-conducting plate 16 can be directly connected to the limiting member or indirectly connected. For example, the two ends of the heat-conducting plate 16 along the first direction X can be connected to the two limiting members by bonding, welding or connecting members, thereby realizing the connection and fixation between the heat-conducting plate 16 and the limiting member.

[0247] In this embodiment, the heat-conducting plate 16 is connected to the limiting member. On the one hand, this improves the connection stability between the current collector 14 and the heat exchange tube 13 and reduces the risk of failure. On the other hand, the limiting member can transfer the expansion force of the battery cell 20 to the heat-conducting plate 16, thereby using the heat-conducting plate 16 to resist the expansion force generated by the battery cell 20 and improve the anti-expansion performance of the battery device 10.

[0248] It should be understood that the connecting segment 132 can be disposed close to the limiting member 111 along the outer surface of the limiting member 111, or it can be disposed through the interior of the limiting member 111.

[0249] In some embodiments, the limiting member 111 has a cavity inside, and the connecting section 132 passes through the cavity and communicates with the current collection assembly 14.

[0250] It should be understood that the connecting segment 132 can pass through and extend into the cavity inside the limiting member 111, thereby communicating with the current collection assembly 14.

[0251] In this embodiment, the connecting segment 132 is housed in the cavity inside the limiting member 111, which reduces the space occupied by the connecting segment 132 inside the housing 11 and improves the overall energy density of the battery device 10.

[0252] In some embodiments, thermal insulation foam is provided inside the cavity of the limiting member 111, and the thermal insulation foam wraps the connecting section 132. In this way, the heat loss of the heat exchange medium in the connecting section 132 can be reduced, and the heat exchange efficiency between the heat exchange medium and the battery cell assembly 12 in the heat exchange section 131 can be improved.

[0253] Based on some embodiments of this application, further reference can be made. Figures 2 to 9 As described, the housing 11 may also include a frame 112, a cover 113, and a base plate 114. The cover 113 is connected to the frame 112, and the base plate 114 is connected to the frame 112. The base plate 114, the frame 112, and the cover 113 together form an accommodating space. The heat-conducting plate 16 is connected to the frame 112, and the battery cell assembly 12 is mounted on the heat-conducting plate 16.

[0254] The heat-conducting plate 16 is connected to the frame 112 at both ends along the first direction X. The connection between the two can be achieved by welding, brazing or sealing adhesive.

[0255] It should be understood that the frame 112 of the battery device 10 in this embodiment can be used to support multiple battery cells 20. The frame 112 in this embodiment can be a hollow structure formed by four beams connected end-to-end, and has at least one opening. For example, the frame 112 can have two openings, located at both ends of the frame 112 along the second direction Z. The frame 112 can also have multiple openings, for example, four openings, located at the four end faces of the frame 112 parallel to the second direction Z. This embodiment is not limited to these.

[0256] In this embodiment, the frame 112 may further include multiple beams, such as multiple longitudinal beams and multiple transverse beams between four beams arranged in pairs opposite each other. Furthermore, the cross-sectional shape of each beam may be rectangular, polygonal, plate-shaped, or irregular, such as L-shaped, T-shaped, or C-shaped.

[0257] In some embodiments, the frame 112 may have a first opening and a second opening, and the first opening and the second opening are respectively located on both sides of the frame 112 along the second direction Z. A plurality of battery cells 20 can be placed from the first opening or the second opening into the receiving space formed by the cover 113, the frame 112 and the base plate 114.

[0258] In this embodiment of the application, the cover 113 and the base plate 114 of the battery device 10 can both be connected to the frame 112 and respectively cover the two openings of the frame 112.

[0259] It should be understood that the structures of the cover 113 and the base plate 114 in this application embodiment can be configured according to actual applications. For example, the cover 113 and the base plate 114 can both be hollow cuboids with one face as an opening. The opening of the cover 113 is opposite to the first opening of the frame 112, and the opening of the base plate 114 is opposite to the second opening of the frame 112. The cover 113 and the side containing the first opening of the frame 112 are interlocked, and the base plate 114 and the side containing the second opening of the frame 112 are interlocked. The cover 113, the frame 112, and the base plate 114 together form a closed chamber.

[0260] For example, the cover 113 is a hollow cuboid with one open side, and the base plate 114 is a plate-like structure with a certain thickness. The opening of the cover 113 is positioned opposite to the first opening of the frame 112, so that the cover 113 covers the first opening of the frame 112. The base plate 114 covers the second opening of the frame 112, and the cover 113, frame 112, and base plate 114 together form a closed chamber.

[0261] The enclosed cavity formed by the cover 113, frame 112, and base plate 114 can accommodate one or more battery cells 20. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed within the accommodating space formed by the sequential fastening of the cover 113, frame 112, and base plate 114. The cover 113, frame 112, and base plate 114 have simple structures and can be adapted to different models of battery cells 20, allowing for modular production. Furthermore, the cover 113 and frame 112, and the frame 112 and base plate 114 can be connected using simple methods such as connectors, adhesive bonding, or heat fusion, enabling rapid assembly of the battery device 10 and improving its assembly efficiency. Alternatively, the frame 112 and base plate 114 can be integrally formed. For example, the base plate 114 has a plate-like structure, with its edges bent to form the frame 112. In addition, the openings on both sides of the frame 112 are connected to the cover 113 and the bottom plate 114 respectively. Compared with the one-piece box structure, it is easier to replace the cover 113 and the bottom plate 114 without the need to add an extra protective plate to resist external ball impacts. This simplifies the structure of the battery device 10 and improves the overall lightweight of the battery device 10.

[0262] It should be understood that the shapes of the cover 113, frame 112 and base plate 114 in the embodiments of this application can be determined according to the shape of the components that are commonly housed by the three, for example, according to the shape of the combination of multiple battery cells 20 housed inside.

[0263] In this embodiment, the heat-conducting plate 16 is connected to the frame 112, so that the heat-conducting plate 16 and the heat exchange tube 13 can be fixed inside the housing 11, improving the stability of the heat exchange structure. The heat-conducting plate 16 can also be used to support the weight of the battery cell assembly 12, improving the overall stability of the battery device 10.

[0264] In some embodiments, the heat exchange tube 13 can also be connected to the frame 112, and the two ends of the heat exchange tube 13 along the third direction Y can be connected to the frame 112. The connection between the two can be achieved by welding, brazing or sealing adhesive bonding.

[0265] In some embodiments, the heat-conducting plate 16 and the base plate 114 are spaced apart.

[0266] The heat-conducting plate 16 and the base plate 114 are spaced apart, that is, there is a gap between the heat-conducting plate 16 and the base plate 114 in the second direction Z.

[0267] In this embodiment, the heat-conducting plate 16 is spaced apart from the base plate 114, so that the base plate 114 does not bear the weight of the battery cell assembly 12, thus protecting the base plate 114. In addition, when the base plate 114 is subjected to external impact, the spaced apart arrangement of the heat-conducting plate 16 and the base plate 114 can protect the battery cell assembly, thereby improving the safety performance of the battery device 10.

[0268] Furthermore, the cover 113 and the base plate 114 can be made of plastic or metal. For example, the cover 113 and the base plate 114 can be made of plastic, thereby achieving a lightweight design for the battery device 10. It should be understood that the cover 113 and the base plate 114 can also be made of other materials, such as metal or composite materials. For example, the cover 113 and / or the base plate 114 can also be sheet metal, thereby improving the structural strength of the battery device 10.

[0269] In this embodiment, the cover 113 and the frame 112 are connected by adhesive bonding or thermal fusion; and / or, the base plate 114 and the frame 112 are connected by adhesive bonding or thermal fusion. This improves the connection strength between the two components and allows for quick replacement of the faulty component without damaging other components in the event of a failure in one component. This improves the utilization rate of the battery device 10 and further enhances its performance. Furthermore, adhesive bonding or thermal fusion enables sealing between the cover 113 and the frame 112, and between the base plate 114 and the frame 112, without the need for additional structures such as sealing rings. This improves the sealing performance of the battery device 10 and simplifies its structure.

[0270] In some embodiments, the current collector 14 and the heat exchange tube 13 are connected by induction welding.

[0271] It should be understood that the current collector 14 and the heat exchange tube 13 are connected by induction welding. Specifically, the first current collector cavity 141 in the current collector 14 and the first connecting section 132 of the heat exchange tube 13 can be connected by induction welding, and the second current collector cavity 142 in the current collector 14 and the connecting section 132 of the heat exchange tube 13 can be connected by welding.

[0272] In this embodiment, the current collector 14 and the heat exchange tube 13 are connected by induction welding. Induction welding can directly act on the welding part through electromagnetic induction, without the need to move the entire heat exchange system. It is more convenient to operate, and for smaller connection parts, it can quickly achieve connection. Moreover, the welding strength is high, which can improve processing efficiency and effectively save costs.

[0273] The current collector 14 and the heat exchange tube 13 can also be connected in other ways. For example, the current collector 14 and the heat exchange tube 13 can be connected by brazing or adhesive bonding, which results in lower thermal resistance and improves heat transfer efficiency during the heat exchange process. Furthermore, connecting them by brazing or adhesive bonding improves the sealing between them, thereby enhancing the overall performance of the battery device 10. Alternatively, the current collector 14 and the heat exchange tube 13 can be fixed together using soldering or ultrasonic welding, which improves stability, saves materials, and simplifies operation. Furthermore, they can also be connected using fasteners; this application does not limit the connection in any way.

[0274] According to some embodiments of this application, this application also provides an electrical device including the battery device 10 described in any of the above embodiments, wherein the battery device 10 provides electrical energy to the electrical device.

[0275] In some implementations, the electrical equipment can be a vehicle, a ship, or a spacecraft.

[0276] According to some embodiments of this application, see Figures 2 to 9 This application provides a battery device 10, including a housing 11, a battery cell assembly 12, and a heat exchange pipe 13. The housing 11 has a receiving space; the battery cell assembly 12 is housed in the receiving space and includes a plurality of battery cells 20 arranged along a first direction X; the heat exchange pipe 13 includes a heat exchange section 131 and a connecting section 132 that are interconnected. The heat exchange section 131 is disposed on one side of the battery cell assembly along a second direction Z and extends along the first direction X. The heat exchange section 131 is used to regulate the temperature of the battery cell assembly 12. The connecting section 132 includes a bent section 1321 that is bent relative to the heat exchange section 131. The connecting section 132 is used to transport the heat exchange medium. The cross-section of the bent section 1321 is circular, and the dimension of the heat exchange section 131 along a third direction Y is larger than the dimension of the bent section 1321 along a third direction. The first direction X, the second direction Z, and the third direction Y are all perpendicular to each other.

[0277] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The box (11) has a storage space; A battery cell assembly (12) is housed in the housing space, the battery cell assembly (12) comprising a plurality of battery cells (20) arranged along a first direction; A heat exchange tube (13) includes a heat exchange section (131) and a connecting section (132) that are interconnected. The heat exchange section (131) is disposed on one side of the battery cell assembly (12) along a second direction and extends along a first direction. The heat exchange section (131) is used to regulate the temperature of the battery cell assembly (12). The connecting section (132) includes a bent section (1321) that is bent relative to the heat exchange section (131). The connecting section (132) is used to transport the heat exchange medium. The bending section (1321) has a circular cross-section, and the dimension of the heat exchange section (131) along the third direction is greater than the dimension of the bending section (1321) along the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that, The heat exchange section (131) has a rectangular cross-section.

3. The battery device according to claim 1, characterized in that, The bent section (1321) is bent in the second direction relative to the heat exchange section (131).

4. The battery device according to claim 3, characterized in that, The connecting section (132) further includes an extension section (1322) extending along the third direction, and the bending section (1321) also bends relative to the extension section (1322) along the second direction to connect the heat exchange section (131) and the extension section (1322).

5. The battery device according to claim 4, characterized in that, The battery device further includes a current collector assembly (14) which is connected to the extension section (1322) and is used to supply and / or recover the heat exchange medium to the heat exchange tube (13). The current collector assembly (14) is located on one side of the battery cell assembly (12) along the third direction.

6. The battery device according to claim 5, characterized in that, The heat exchange tube (13) includes two connecting sections (132), which are respectively connected to both ends of the heat exchange section (131), and both connecting sections (132) are located on the same side of the heat exchange section (131) along the first direction. The extension sections (1322) of the two connecting sections (132) are arranged sequentially along the second direction.

7. The battery device according to claim 6, characterized in that, The current collection assembly (14) includes a first current collection cavity (141) and a second current collection cavity (142) that are isolated from each other. The first current collection cavity (141) and the second current collection cavity (142) are respectively connected to the extension section (1322) of the two connecting sections (132), and the first current collection cavity (141) and the second current collection cavity (142) are arranged along the second direction.

8. The battery device according to claim 7, characterized in that, The current collection assembly (14) has a cavity structure. The current collection assembly (14) also includes a partition plate (143). The partition plate (143) is disposed in the cavity of the current collection assembly (14) and divides the current collection assembly (14) into the first current collection cavity (141) and the second current collection cavity (142).

9. The battery device according to claim 5, characterized in that, The battery device includes a plurality of battery cell assemblies (12) arranged along the third direction. The housing (11) includes a limiting member (111) disposed at one end of the battery cell assembly (12) along the first direction. The limiting member (111) extends along the third direction to abut against the plurality of battery cell assemblies (12) and has a cavity inside. The connecting segment (132) passes through the cavity and communicates with the current collector assembly (14).

10. The battery device according to any one of claims 1 to 9, characterized in that, The heat exchange tube (13) further includes a transition section (133) for connecting the heat exchange section (131) and the connecting section (132). The size of the transition section (133) along the second direction gradually decreases from one end near the connecting section (132) to one end near the heat exchange section (131).

11. The battery device according to claim 10, characterized in that, The connecting section (132), the transition section (133), and the heat exchange section (131) are integrally extruded from a hollow circular tube.

12. The battery device according to any one of claims 1 to 9, characterized in that, The battery device further includes a heat-conducting plate (16), which is disposed on one side of the battery cell assembly (12) along the second direction, and at least one heat exchange section (131) is disposed on the side of the heat-conducting plate (16) away from the battery cell assembly (12).

13. The battery device according to claim 12, characterized in that, The battery device includes a plurality of battery cell assemblies (12) arranged along a third direction, and a plurality of heat-conducting plates (16) spaced apart along the third direction. The plurality of heat-conducting plates (16) extend along a first direction, and two adjacent battery cell assemblies (12) are connected to the same heat-conducting plate (16).

14. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 13, wherein the battery device provides electrical energy to the electrical device.

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