Battery device and electric device

Abstract

The invention provides a battery device and a power utilization device. The battery device comprises a battery monomer assembly, a heat exchange part, a first insulation part and a heat conduction part, the battery monomer assembly comprises a plurality of battery monomers arranged in the first direction, each battery monomer comprises a shell, an electrode assembly and an electrode terminal, the shell is provided with a containing cavity and comprises a first wall, and the first wall is located on one side, in the second direction, of the containing cavity; the electrode terminal is arranged on the first wall, and the electrode terminal is electrically connected with the electrode assembly. The heat exchange component is arranged on one side, back to the accommodating cavity, of the first wall, at least part of the first insulating component is arranged between the first wall of the plurality of single batteries and the heat exchange component, and the first insulating component is provided with an opening penetrating through the first insulating component along the second direction. The heat conduction component is connected with the heat exchange component and the first wall and is at least partially arranged in the opening, and the heat conductivity coefficient of the heat conduction component is larger than that of the first insulation component. According to the invention, the reliability and energy density of the battery device can be improved.

Description

Technical Field

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

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

[0003] In the development of battery technology, how to simultaneously improve the reliability and energy density of battery devices is an ongoing research direction. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device and an electrical device that can simultaneously improve the reliability and energy density of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, which includes a battery cell assembly, a heat exchange component, a first insulating component, and a heat-conducting component. The battery cell assembly includes a plurality of battery cells arranged along a first direction. Each battery cell includes a housing, an electrode assembly, and an electrode terminal. The housing has a receiving cavity, and the electrode assembly is disposed within the receiving cavity. The housing includes a first wall located on one side of the receiving cavity along a second direction. The electrode terminal is disposed on the first wall and is electrically connected to the electrode assembly. The first direction and the second direction intersect.

[0006] A heat exchange component is disposed on the side of the first wall facing away from the receiving cavity. At least a portion of a first insulating component is disposed between the first wall of the plurality of battery cells and the heat exchange component. The first insulating component has an opening extending through itself in a second direction, located between the first wall and the heat exchange component. A heat-conducting component connects the heat exchange component and the first wall, and at least a portion of the heat-conducting component is disposed within the opening. The thermal conductivity of the heat-conducting component is greater than that of the first insulating component.

[0007] The heat exchange component is located on the side of the first wall facing away from the receiving cavity, and can share part of the space on the side of the first wall facing away from the receiving cavity with the electrode terminals, thereby reducing the space occupancy of the heat exchange component along the second direction and thus improving the energy density of the battery device. The first insulating component can insulate the heat exchange component from the first wall, reducing the risk of short circuits in individual battery cells and thus improving the reliability of the battery device.

[0008] The introduction of heat-conducting components can improve the heat exchange rate between the battery cells and the heat exchange components, thereby improving the reliability of the battery device. Furthermore, the opening in the first insulating component to accommodate the heat-conducting components reduces their space occupancy, especially along the second direction, thus increasing the energy density of the battery device. In this way, the above technical solution can simultaneously improve both the reliability and energy density of the battery device.

[0009] In some embodiments of the first aspect, each battery cell has a plurality of spaced-apart openings on its first wall, and each opening is provided with a heat-conducting component.

[0010] The above technical solution can not only improve the flexibility of the layout of heat-conducting components, but also increase the contact area between the heat-conducting components and the first wall of each battery cell, thereby improving the heat exchange efficiency.

[0011] In some embodiments of the first aspect, the number of openings is multiple, and at least a portion of the multiple openings are disposed along the circumferential edge of the electrode terminal.

[0012] The above technical solution provides an opening in the circumferential edge region of the electrode terminal and a heat-conducting component with high thermal conductivity within the opening. In this way, the local high heat generated by the electrode terminal can be quickly conducted to the heat exchange component, achieving efficient heat diffusion and release. This effectively reduces local overheating of individual battery cells and further improves the reliability of the battery device.

[0013] In some embodiments of the first aspect, at least a portion of the plurality of openings are arranged around the electrode terminals.

[0014] It can further increase the density of heat-conducting components in the circumferential edge region of the electrode terminals, thereby further improving the heat transfer efficiency between the electrode terminals and the heat exchange components.

[0015] In some embodiments of the first aspect, at least a portion of the plurality of openings are annular and arranged around the electrode terminal; and / or, each battery cell electrode terminal is provided with a plurality of openings, the portion of which is spaced apart around the electrode terminal.

[0016] In some embodiments of the first aspect, the total projected area of ​​the opening along the second direction is S1, and the projected area of ​​the first insulating member along the second direction is S2, wherein 5% ≤ S1 / S2 ≤ 60%.

[0017] By setting S1 / S2 to greater than or equal to 5%, the settable area of ​​the heat-conducting component can be increased, thereby improving the heat exchange efficiency between the heat exchange component and the battery cell; by setting S1 / S2 to less than or equal to 60%, the solid amount of the first insulating component can be increased, thereby improving the overall structural strength of the first insulating component.

[0018] In some embodiments of the first aspect, the total projected area of ​​the opening along the second direction is S1, and the projected area of ​​the first wall along the second direction is S3, wherein 5% ≤ S1 / S3 ≤ 80%.

[0019] By setting S1 / S3 to greater than or equal to 5%, the settable area of ​​the heat-conducting component can be increased, thereby improving the heat exchange efficiency between the heat exchange component and the battery cell; by setting S1 / S3 to less than or equal to 80%, the risk of the opening interfering with other components set on the first wall can be reduced.

[0020] In some embodiments of the first aspect, the heat exchange component includes a heat exchange element and a temperature-conducting element, the temperature-conducting element being disposed between the heat exchange element and the first wall, the heat exchange element forming at least a portion of a flow channel for accommodating the heat exchange medium. In the same plane perpendicular to the second direction, the projected area of ​​the temperature-conducting element is larger than the projected area of ​​the heat exchange element.

[0021] The above technical solution, by introducing a heat-conducting component, can increase the heat exchange interface between the heat exchange component and the first wall, thereby further improving the heat exchange efficiency of the battery device.

[0022] In some embodiments of the first aspect, the first insulating component includes a plurality of insulating sheets, which are disposed one-to-one with a plurality of battery cells. On each battery cell, all the insulating sheets are disposed between the first wall of the plurality of battery cells and the heat exchange component.

[0023] Multiple insulating sheets are individually molded and then assembled between the first wall of multiple battery cells and the heat exchange components. The individually molded insulating sheets facilitate standardization and mass production, reducing manufacturing costs.

[0024] In some embodiments of the first aspect, the first insulating component includes a plurality of insulating films, each corresponding to a plurality of battery cells. On each battery cell, a portion of the insulating film is connected to at least a portion of the outer surface of the housing, and another portion of the insulating film is disposed between the first wall and the heat exchange component.

[0025] The insulating film can achieve dual insulation functions simultaneously, eliminating the need for separate insulation for the outer surface of the casing and the heat exchange components. This reduces material usage and process complexity, and helps to lower production costs.

[0026] In some embodiments of the first aspect, the battery device further includes a busbar component, a first insulating component including an insulating support, the busbar component being fixed to the insulating support, the insulating support being connected to a first wall, and the busbar component being connected to the electrode terminals of a plurality of battery cells.

[0027] The insulating bracket can achieve dual insulation function at the same time, eliminating the need for separate insulation for the busbar and heat exchange components, thereby reducing material usage and process complexity, and helping to reduce production costs.

[0028] In some embodiments of the first aspect, the projection of the opening along the second direction is located within the projection range of the first wall.

[0029] This allows the insulating support to form a rib structure between two adjacent openings along the first direction. On the one hand, the rib structure can improve the overall structural strength of the insulating support; on the other hand, when two adjacent battery cells are fixed with adhesive, the rib structure can act as a barrier to prevent adhesive from overflowing between the two adjacent battery cells.

[0030] In some embodiments of the first aspect, the heat exchange component is fixedly connected to multiple battery cells in the battery cell assembly.

[0031] By fixing the heat exchange components to multiple battery cells, the overall structural stability of the battery cell assembly can be improved, reducing the relative displacement of battery cells under external conditions such as vibration and impact, and minimizing the risk of connection failure due to loose battery cells. Furthermore, the heat exchange components can effectively withstand the expansion forces of the battery cells during cycling, thereby improving the reliability and lifespan of the battery system.

[0032] In some embodiments of the first aspect, the number of battery cell assemblies is multiple and distributed along a third direction, and the heat exchange component is fixedly connected to at least two partially adjacent battery cell assemblies, with the first direction, the second direction and the third direction intersecting each other.

[0033] By fixing the heat exchange components to multiple battery cell modules, the overall structural stability of the battery cell modules can be improved, the risk of relative displacement of the battery cell modules under external conditions such as vibration and impact can be reduced, and the overall mechanical strength and seismic performance of the battery device can be improved.

[0034] In some embodiments of the first aspect, the heat exchange components and electrode terminals are arranged along a third direction, with the first direction, the second direction, and the third direction intersecting each other.

[0035] This allows for a simpler structure for the heat exchange components, reducing manufacturing and assembly difficulties and effectively lowering production costs. Simultaneously, this structural layout enhances the versatility of the heat exchange components, further improving the economic efficiency of battery devices during mass production.

[0036] In some embodiments of the first aspect, the battery device further includes a housing having a receiving space, a battery cell assembly disposed within the receiving space, and a heat exchange component connected to the housing.

[0037] The above technical solution can improve the stability of heat exchange components and reduce the risk of loosening or displacement of heat exchange components under long-term operation or external vibration and impact, so as to further improve the reliability of battery devices.

[0038] In some embodiments of the first aspect, the housing includes a first beam and a second beam, the first beam and the second beam being disposed within an accommodating space, and the second beam being disposed opposite to the first beam along a first direction, a battery cell assembly being disposed between the first beam and the second beam, and a heat exchange component being connected to at least one of the first beam and the second beam.

[0039] The heat exchange components can be installed and fixed using the first beam and / or the second beam, thereby further improving the stability and vibration resistance of the installation.

[0040] In some embodiments of the first aspect, the battery device further includes a reinforcing member extending along a first direction, the reinforcing member being connected to a heat exchange component, one end of the reinforcing member being connected to a first beam along the first direction, and the other end of the reinforcing member being connected to a second beam along the first direction.

[0041] The above technical solution, by introducing reinforcing components, can significantly improve the stability and deformation resistance of heat exchange components under long-term use and external vibration and impact conditions. On the other hand, it can form a stable mechanical transmission path between the first beam and the second beam, thereby improving the overall structural strength of the box.

[0042] In some embodiments of the first aspect, the housing includes a base plate located on the side of the battery cell assembly along the second direction and facing away from the heat exchange component, the battery cell assembly being supported on the base plate.

[0043] The heat exchange component is located on the side of the battery cell assembly along the second direction and facing away from the base plate, which can reduce the risk of the heat exchange component being impacted by the bottom ball and improve the reliability of the heat exchange component.

[0044] In some embodiments of the first aspect, the battery device further includes a second insulating member disposed on the side of the first insulating member along a third direction and close to the electrode terminal, the second insulating member being disposed between the electrode terminal and the heat exchange member, the first direction, the second direction and the third direction intersecting each other.

[0045] The second insulating component forms an insulating barrier between the electrode terminals and the heat exchange components, effectively preventing direct contact or potential discharge paths between them. This significantly improves the reliability of the battery device under high-voltage, high-power operating conditions.

[0046] In some embodiments of the first aspect, the second insulating member protrudes along a second direction from the side surface of the electrode terminal facing away from the first wall.

[0047] This can further improve the insulation protection effect of the second insulating component between the electrode terminals and the heat exchange component.

[0048] In some embodiments of the first aspect, the first insulating component and the second insulating component are connected together.

[0049] It can not only improve the overall structural compactness, but also enhance the overall structural stability of the first and second insulating components.

[0050] Secondly, this application provides an electrical device that includes a battery device provided in any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0051] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0052] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application; Figure 2 This is a partial top view of a battery device provided in some embodiments of this application; Figure 3 A battery device provided for some embodiments of this application Figure 2 A schematic diagram of the cross-sectional structure at point AA; Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point M; Figure 5 A top view of the first insulating component of a battery device provided in some embodiments of this application; Figure 6 This is a partial top view of the structure of a battery device provided in some embodiments of this application, showing the cooperation between the first insulating component and the electrode terminal; Figure 7 A partial top view schematic diagram of another battery device provided in some embodiments of this application; Figure 8 This is a partial top view of another battery device provided in some embodiments of this application; Figure 9 Another battery device provided for some embodiments of this application Figure 2 A schematic diagram of the cross-sectional structure at point AA; Figure 10 for Figure 9 A magnified schematic diagram of the structure at point N.

[0053] The reference numerals in the detailed embodiments are as follows: 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 100. Battery cell assembly; 10. Battery cell; 11. Housing; 111. First wall; 12. Electrode assembly; 121. Electrode body; 122. Tab; 13. Electrode terminal; 20. Heat exchange components; 21. Heat exchange parts; 22. Temperature conductive parts; 30. First insulating component; 31. Rib structure; 40. Opening; 50. Heat-conducting component; 60. Box frame; 61. First beam; 62. Second beam; 63. Base plate; 70. Reinforcing member; 80. Second insulating component; 90. Stress relief groove; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0054] 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 and completely 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.

[0055] 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 specification 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 specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0056] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0057] 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 connection 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.

[0058] 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.

[0059] 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.

[0060] In this application, "multiple" means two or more (including two).

[0061] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0062] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0063] In related technologies, battery devices typically include heat exchange components to reduce the temperature of individual battery cells during operation, and insulation components to reduce the risk of short circuits in individual cells, thereby improving the reliability of the battery device. However, since heat exchange and insulation components occupy a certain amount of internal space in the battery device, they can affect the energy density of the battery device. Therefore, how to simultaneously improve the reliability and energy density of battery devices is a technical challenge in the industry and an ongoing research direction in battery technology.

[0064] Based on the above considerations, this application designs a battery device, which includes a battery cell assembly, a heat exchange component, a first insulating component, and a heat-conducting component. The battery cell assembly includes a plurality of battery cells arranged along a first direction. Each battery cell includes a housing, an electrode assembly, and an electrode terminal. The housing has a receiving cavity, and the electrode assembly is disposed in the receiving cavity. The housing includes a first wall located on one side of the receiving cavity along a second direction. The electrode terminal is disposed on the first wall and is electrically connected to the electrode assembly. The first direction and the second direction intersect.

[0065] A heat exchange component is disposed on the side of the first wall facing away from the receiving cavity. At least a portion of a first insulating component is disposed between the first wall of the plurality of battery cells and the heat exchange component. The first insulating component has an opening extending through itself in a second direction, located between the first wall and the heat exchange component. A heat-conducting component connects the heat exchange component and the first wall, and at least a portion of the heat-conducting component is disposed within the opening. The thermal conductivity of the heat-conducting component is greater than that of the first insulating component.

[0066] The heat exchange component is located on the side of the first wall facing away from the receiving cavity, and can share part of the space on the side of the first wall facing away from the receiving cavity with the electrode terminals, thereby reducing the space occupancy of the heat exchange component along the second direction and thus improving the energy density of the battery device. The first insulating component can insulate the heat exchange component from the first wall, reducing the risk of short circuits in individual battery cells and thus improving the reliability of the battery device.

[0067] The introduction of heat-conducting components can improve the heat exchange rate between the battery cells and the heat exchange components, thereby improving the reliability of the battery device. Furthermore, the opening in the first insulating component to accommodate the heat-conducting components reduces their space occupancy, especially along the second direction, thus increasing the energy density of the battery device. In this way, the above technical solution can simultaneously improve both the reliability and energy density of the battery device.

[0068] The battery cells described in this application are applicable to battery devices and electrical equipment using battery devices. Electrical equipment can be devices that use battery devices as a power source or various energy storage systems that use battery devices as energy storage elements. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0069] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0070] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0071] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0072] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0073] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0074] In some embodiments, the battery device 2 may be an energy storage device.

[0075] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0076] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0077] Figure 2 This is a partial top view of a battery device provided in some embodiments of this application. Figure 3 A battery device provided for some embodiments of this application Figure 2 A schematic diagram of the cross-sectional structure at point AA. Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point M. Figure 5 This is a top view of the first insulating component of a battery device provided in some embodiments of this application.

[0078] Continue to refer to Figures 2 to 5 This application provides a battery device 2, which includes a battery cell assembly 100, a heat exchange component 20, a first insulating component 30, and a heat-conducting component 50. The battery cell assembly 100 includes a plurality of battery cells 10 arranged along a first direction X. Each battery cell 10 includes a housing 11, an electrode assembly 12, and an electrode terminal 13. The housing 11 has a receiving cavity, and the electrode assembly 12 is disposed in the receiving cavity. The housing 11 includes a first wall 111, which is located on one side of the receiving cavity along a second direction Y. The electrode terminal 13 is disposed on the first wall 111 and is electrically connected to the electrode assembly 12. The first direction X and the second direction Y intersect.

[0079] A heat exchange component 20 is disposed on the side of the first wall 111 facing away from the receiving cavity. At least a portion of the first insulating component 30 is disposed between the first wall 111 of the plurality of battery cells 10 and the heat exchange component 20. The first insulating component 30 has an opening 40 extending through itself in the second direction Y, and the opening 40 is located between the first wall 111 and the heat exchange component 20. A heat-conducting component 50 connects the heat exchange component 20 and the first wall 111, and at least a portion of the heat-conducting component 50 is disposed within the opening 40. The thermal conductivity of the heat-conducting component 50 is greater than that of the first insulating component 30.

[0080] The battery device 2 mentioned in the embodiments of this application may include one or more battery cell assemblies 100 for providing voltage and capacity. The battery cell assembly 100 may include a plurality of battery cells 10, which are connected in series, parallel or mixed connection through a busbar.

[0081] As an example, a battery cell assembly 100 is typically formed by arranging multiple battery cells 10.

[0082] As an example, the battery cell 10 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0083] As an example, the battery cell assembly 100 can be a battery module, which is formed by arranging and fixing multiple battery cells 10 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 10 together with cable ties.

[0084] As an example, the battery device 2 can be a battery pack, which includes a housing 60 and one or more battery cell assemblies 100, the battery cell assemblies 100 being housed in the housing 60.

[0085] As an example, the battery cell assembly 100 can be a battery module, which can be housed in the housing 60 by fixing the battery module in the housing 60.

[0086] As an example, the battery cell assembly 100 can also be housed in the housing 60 by directly fixing multiple battery cells 10 to the housing 60.

[0087] For example, the heat exchange component 20 is thermally connected (e.g., attached) to the first wall 111, and the heat exchange medium flows within the heat exchange component 20 and exchanges heat with the battery cell 10 through the sidewall of the heat exchange component 20. When the temperature of the battery cell 10 is too high, the heat exchange component 20 can cool the battery cell 10; when the temperature of the battery cell 10 is too low, the heat exchange component 20 can keep the battery cell 10 warm, thereby improving the service life of the battery cell 10.

[0088] As an example, the heat exchange component 20 has a medium flow channel inside, which is used to contain the heat exchange medium.

[0089] The medium flow channel inside the heat exchange component 20 can extend in a straight line or in a curve, depending on the actual application environment.

[0090] In some examples, the heat exchange component 20 contacts the sidewall with the largest area of ​​the battery cell 10 to improve the heat exchange efficiency of the battery. This contact with the sidewall with the largest area of ​​the battery cell 10 can be perpendicular to the first wall 111.

[0091] Optionally, the heat exchange medium can be a liquid, which can be, but is not limited to, water, ethylene glycol, and mixtures of water and ethylene glycol.

[0092] The heat exchange component 20 enables the heat generated by the battery cell 10 to be quickly conducted to the housing 60 or external cooling structure, reducing heat accumulation and minimizing the risk of thermal runaway caused by local temperature rise.

[0093] As an example, the heat exchange component 20 can be a plate-like structure, such as a heat exchange plate.

[0094] The first insulating component 30 may be partially disposed between the first wall 111 of the plurality of battery cells 10 and the heat exchange component 20, or it may be entirely disposed between the first wall 111 of the plurality of battery cells 10 and the heat exchange component 20.

[0095] The first insulating component 30 can be connected to the heat exchange component 20. The first insulating component 30 can be fixed to the heat exchange component 20 or detachably connected to it. The first insulating component 30 can be directly connected to the heat exchange component 20 or constrained to it by other components. As an example, the connection method between the first insulating component 30 and the heat exchange component 20 can be, but is not limited to, bolted connection, plug-in connection, or adhesive connection.

[0096] The first insulating component 30 can be connected to the first wall 111. The first insulating component 30 can be fixed to the first wall 111 or detachably connected to the first wall 111. The first insulating component 30 can be directly connected to the first wall 111 or constrained to the first wall 111 by other components. As an example, the connection method between the first insulating component 30 and the first wall 111 can be, but is not limited to, bolt connection, plug-in connection, or adhesive connection.

[0097] Of course, the first insulating component 30 can also be connected to both the heat exchange component 20 and the first wall 111.

[0098] Optionally, the first insulating component 30 may be, but is not limited to, a plate-like structure, a membrane-like structure, or a block-like structure.

[0099] Optionally, the material of the first insulating component 30 may be, but is not limited to, polypropylene, polyamide, silicone rubber, or polyethylene.

[0100] The number of openings 40 can be one or more, where "more" means two or more. For example, if there is only one opening 40, it is located between the first wall 111 of multiple battery cells 10 and the heat exchange component 20. For example, if there are multiple openings 40, each battery cell 10 may have at least one opening 40 between its first wall 111 and the heat exchange component 20.

[0101] The opening 40 can be a through hole structure. In other words, the projection shape of the opening 40 along the second direction Y can be a closed structure, such as a circle, ellipse, rectangle or polygon.

[0102] The opening 40 can also be a slot structure. In other words, the projection shape of the opening 40 along the second direction Y can be a non-closed structure, such as U-shaped, C-shaped, V-shaped, etc.

[0103] The heat-conducting component 50 may be partially or entirely disposed within the opening 40.

[0104] As an example, the thermally conductive component 50 can be a thermally conductive pad or a thermally conductive adhesive, etc. The thermally conductive adhesive can stably connect the heat exchange component 20 and the first wall 111 through the opening 40, thereby improving the grouping stability of the heat exchange component 20 and the battery cell 10.

[0105] Optionally, the material of the thermally conductive component 50 may be, but is not limited to, polyurethane, graphite, or thermal grease.

[0106] For example, the thermal conductivity of the heat-conducting component 50 and the first insulating component 30 can be measured by steady-state method or transient method.

[0107] Among them, the steady-state method involves applying a constant temperature gradient to both ends of a material sample and measuring the heat flux density and temperature difference of the sample under steady-state conditions to calculate the thermal conductivity. Examples include the heat flow method and the heat-protected plate method.

[0108] Transient methods are methods for measuring thermal conductivity under unsteady-state conditions, such as the hot-wire method, laser flare method, and transient plane heat source method.

[0109] The heat exchange component 20 is disposed on the side of the first wall 111 facing away from the receiving cavity, and can share part of the space on the side of the first wall 111 facing away from the receiving cavity with the electrode terminal 13, so as to reduce the space occupancy of the heat exchange component 20 along the second direction Y, thereby improving the energy density of the battery device 2. The first insulating component 30 can insulate the heat exchange component 20 from the first wall 111, reduce the risk of short circuit of the battery cell 10, and thus improve the reliability of the battery device 2.

[0110] The introduction of the heat-conducting component 50 can improve the heat exchange rate between the battery cell 10 and the heat exchange component 20, thereby improving the reliability of the battery device 2. Furthermore, the first insulating component 30 has an opening 40 to accommodate the heat-conducting component 50, which reduces the space occupancy of the heat-conducting component 50, especially along the second direction Y, thereby increasing the energy density of the battery device 2. Thus, the above technical solution can simultaneously improve the reliability and energy density of the battery device 2.

[0111] In some embodiments, the heat-conducting component 50 is made of an insulating material, which may be a high thermal conductivity insulating plastic, such as nylon, polycarbonate, polyphenylene sulfide, polyetheretherketone, etc., or a high thermal conductivity insulating silicone or a high thermal conductivity insulating rubber.

[0112] In some embodiments, the first direction X and the second direction Y are perpendicular.

[0113] In some embodiments, the first insulating component 30 is further provided with a stress relief groove 90, which is spaced apart from the opening 40. In the same plane perpendicular to the second direction Y, the orthogonal projection area of ​​the stress relief groove 90 is smaller than the orthogonal projection area of ​​the opening 40.

[0114] The above technical solution can provide a small stress relief groove 90 in a position where the space is small and it is not easy to set the opening 40 on the first insulating component 30, which cooperates with the opening 40 to improve the overall stress uniformity of the first insulating component 30.

[0115] In some embodiments, in the same plane perpendicular to the third direction Z, the orthographic projection of the stress relief groove 90 and the orthographic projection of the opening 40 are spaced apart, and the first direction X, the second direction Y and the third direction Z intersect each other, which can further improve the overall stress uniformity of the first insulating component 30.

[0116] In some embodiments, the electrode assembly 12 includes an electrode body 121 and a tab 122, the tab 122 extending from one end face of the electrode body 121 toward the first wall 111.

[0117] It should be noted that, Figure 5 Only the opening 40 and stress relief groove 90 are shown. The first insulating component 30 may also have a first clearance opening (not shown), which is used to avoid the electrode terminal 13. The first clearance opening corresponds to the electrode terminal 13 and is spaced apart from the opening 40. At least a portion of the electrode terminal 13 is located within the first clearance opening. The first insulating component 30 may also have a second clearance opening (not shown), which is used to avoid the pressure relief mechanism. The second clearance opening is spaced apart from the pressure relief mechanism and corresponds to the pressure relief mechanism.

[0118] In some embodiments, each battery cell 10 has a first wall 111 with a plurality of spaced openings 40, and each opening 40 is provided with a heat-conducting component 50.

[0119] For example, the plurality of openings 40 corresponding to the first wall 111 of each battery cell 10 may be spaced apart along a direction perpendicular to the second direction Y.

[0120] The number of heat-conducting components 50 matches the number of openings 40, and multiple heat-conducting components 50 are set in a one-to-one correspondence with multiple openings 40.

[0121] The above technical solution can not only improve the layout flexibility of the heat-conducting component 50, but also increase the contact area between the heat-conducting component 50 and the first wall 111 of each battery cell 10, thereby improving the heat exchange efficiency.

[0122] Figure 6This is a partial top view of the structure of a battery device 2 provided in some embodiments of this application, showing the first insulating component 30 cooperating with the electrode terminal 13.

[0123] Continue to refer to Figure 6 In some embodiments, there are multiple openings 40, and at least a portion of the multiple openings 40 are disposed along the circumferential edge of the electrode terminal 13.

[0124] For example, all of the multiple openings 40 may be provided along the circumferential edge of the electrode terminal 13, or a portion of the multiple openings 40 may be provided along the circumferential edge of the electrode terminal 13.

[0125] As an example, all openings 40 may be divided into multiple groups, each group including at least one opening 40, and each group is provided corresponding to an electrode terminal 13, with the openings 40 in each group being provided along the circumferential edge of each electrode terminal 13.

[0126] As an example, a portion of the multiple openings 40 may be divided into multiple groups, each group including at least one opening 40, and each group is corresponding to an electrode terminal 13, with the openings 40 in each group arranged along the circumferential edge of each electrode terminal 13.

[0127] The opening 40 is disposed along the circumferential edge of the electrode terminal 13. This can be understood as the orthographic projection of the opening 40 being disposed along the circumferential edge of the orthographic projection of the electrode terminal 13 in the same plane perpendicular to the second direction Y. Specifically, in the same plane perpendicular to the second direction Y, the edges of the orthographic projections of the opening 40 and the electrode terminal 13 that are close to each other may coincide, or the edges of the orthographic projections of the opening 40 and the electrode terminal 13 that are close to each other may have a certain preset distance. The preset distance can be set according to the actual application environment.

[0128] In the battery device 2, the electrode terminal 13 serves as the main pathway for current to enter and exit the battery cell 10. During high-current charging and discharging, it often bears a large current load, thus becoming a significant heat-generating area. Especially under high-rate operating conditions, the connection between the electrode terminal 13 and the electrode assembly 12, as well as the contact area between the electrode terminal 13 and the external busbar, may generate high Joule heat due to concentrated current density, resulting in a significantly higher temperature rise in this local area compared to other parts of the battery cell 10.

[0129] The above technical solution provides an opening 40 around the edge of the electrode terminal 13 and a heat-conducting component 50 with high thermal conductivity within the opening 40. In this way, the local high heat generated by the electrode terminal 13 can be quickly conducted to the heat exchange component 20, achieving efficient heat diffusion and release. This can effectively reduce the local overheating phenomenon of the battery cell 10 and further improve the reliability of the battery device 2.

[0130] In some embodiments, at least a portion of the plurality of openings 40 are arranged around the electrode terminal 13, which can further increase the arrangement density of the heat-conducting components 50 in the circumferential edge region of the electrode terminal 13, so as to further improve the heat conduction efficiency between the electrode terminal 13 and the heat exchange component 20.

[0131] In some embodiments, at least a portion of the plurality of openings 40 are annular and surround the electrode terminal 13. This arrangement can maximize the heat exchange interface between the heat-conducting component 50 and the electrode terminal 13, thereby helping to improve the heat conduction efficiency between the electrode terminal 13 and the heat exchange component 20.

[0132] In some embodiments, each battery cell 10 has a plurality of openings 40 corresponding to its electrode terminal 13, and these openings 40 are distributed at intervals around the electrode terminal 13. This arrangement allows for flexible arrangement of the openings 40 according to the space around the electrode terminal 13, which helps to reduce the manufacturing difficulty.

[0133] For example, each electrode terminal 13 is provided with a plurality of openings 40 spaced apart circumferentially along the electrode terminal 13.

[0134] In some embodiments, the total projected area of ​​the opening 40 along the second direction Y is S1, and the projected area of ​​the first insulating member 30 along the second direction Y is S2, wherein 5%≤S1 / S2≤60%.

[0135] For example, the number of openings 40 can be one or more. When there is only one opening 40, the total projected area of ​​the opening 40 along the second direction Y is S1, which refers to the projected area of ​​the opening 40 along the second direction Y. When there are multiple openings 40, the total projected area of ​​the openings 40 along the second direction Y is S1, which refers to the sum of the projected areas of the multiple openings 40 along the second direction Y.

[0136] As an example, S1 / S2 can be, but is not limited to, 5%, 10%, 20%, 30%, 40%, 50%, 60%, etc.

[0137] By setting S1 / S2 to greater than or equal to 5%, the settable area of ​​the heat-conducting component 50 can be increased, thereby improving the heat exchange efficiency between the heat exchange component 20 and the battery cell 10; by setting S1 / S2 to less than or equal to 60%, the solid amount of the first insulating component 30 can be increased, thereby improving the overall structural strength of the first insulating component 30.

[0138] In some embodiments, 20% ≤ S1 / S2 ≤ 40%. As an example, S1 / S2 can be, but is not limited to, 20%, 25%, 30%, 35%, 40%, etc.

[0139] In some embodiments, the total projected area of ​​the opening 40 along the second direction Y is S1, and the projected area of ​​the first wall 111 along the second direction Y is S3, wherein 5%≤S1 / S3≤80%.

[0140] As an example, S1 / S3 can be, but is not limited to, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, etc.

[0141] By setting S1 / S3 to greater than or equal to 5%, the settable area of ​​the heat-conducting component 50 can be increased, thereby improving the heat exchange efficiency between the heat exchange component 20 and the battery cell 10; by setting S1 / S3 to less than or equal to 80%, the risk of the opening 40 interfering with other components set on the first wall 111 can be reduced.

[0142] In some embodiments, the heat exchange component 20 includes a heat exchange element 21 and a temperature-conducting element 22, the temperature-conducting element 22 being disposed between the heat exchange element 21 and the first wall 111, and the heat exchange element 21 forming at least a portion of a flow channel for accommodating the heat exchange medium. In the same plane perpendicular to the second direction Y, the projected area of ​​the temperature-conducting element 22 is larger than the projected area of ​​the heat exchange element 21.

[0143] The heat exchanger 21 is connected to the temperature-conducting element 22. The heat exchanger 21 can be fixed to the temperature-conducting element 22 or detachably connected to the temperature-conducting element 22. The heat exchanger 21 can be directly connected to the temperature-conducting element 22 or it can be constrained to the temperature-conducting element 22 by other components. As an example, the connection method between the heat exchanger 21 and the temperature-conducting element 22 can be, but is not limited to, bolt connection, plug-in connection, or adhesive connection.

[0144] As an example, the heat exchanger 21 can form the entire flow channel; in other words, the entire flow channel is set in the heat exchanger 21.

[0145] As an example, the heat exchanger 21 can also form part of the flow channel; in other words, the heat exchanger 21 and the heat-conducting element 22 together form the flow channel.

[0146] The above technical solution, by introducing the heat-conducting element 22, can increase the heat exchange interface between the heat exchange component 20 and the first wall 111, thereby further improving the heat exchange efficiency of the battery device 2.

[0147] In some embodiments, the first insulating component 30 includes a plurality of insulating sheets, which are disposed one-to-one with a plurality of battery cells 10. On each battery cell 10, all the insulating sheets are disposed between the first wall 111 of the plurality of battery cells 10 and the heat exchange component 20.

[0148] Multiple insulating sheets are individually molded and then assembled between the first wall 111 of multiple battery cells 10 and the heat exchange component 20. The individually molded insulating sheets facilitate standardization and mass production, reducing manufacturing costs.

[0149] In some embodiments, the number of insulating sheets is one, and the insulating sheet is disposed between the first wall 111 of the plurality of battery cells 10 and the heat exchange component 20.

[0150] In some embodiments, there are multiple insulating sheets, and each insulating sheet is disposed in a one-to-one correspondence with the first wall 111 of a multiple battery cell 10. In other words, an insulating sheet is disposed between the first wall 111 of a battery cell 10 and the heat exchange component 20.

[0151] In some embodiments, the first insulating component 30 includes a plurality of insulating films, each corresponding to a plurality of battery cells 10. On each battery cell 10, a portion of the insulating film is connected to at least a portion of the outer surface of the housing 11, and another portion of the insulating film is disposed between the first wall 111 and the heat exchange component 20.

[0152] A portion of the insulating film may be attached to a portion of the outer surface of the housing 11, or it may be attached to the entire outer surface of the housing 11.

[0153] The insulating film can achieve dual insulation function at the same time, eliminating the need to separately set insulation for the outer surface of the housing 11 and the heat exchange component 20, thereby reducing material usage and process complexity, and helping to reduce production costs.

[0154] In some embodiments, the battery device 2 further includes a busbar component, the first insulating component 30 includes an insulating support, the busbar component is fixed to the insulating support, the insulating support is connected to the first wall 111, and the busbar component is connected to the electrode terminals 13 of a plurality of battery cells 10.

[0155] Multiple battery cells 10 can be connected in series and / or in parallel through a busbar component.

[0156] The insulating bracket can achieve dual insulation function at the same time, eliminating the need to set separate insulation for the busbar and heat exchange components 20, thereby reducing material usage and process complexity, and helping to reduce production costs.

[0157] In some embodiments, along the second direction Y, the projection of the opening 40 is located within the projection range of the first wall 111.

[0158] This allows the insulating support to form a rib structure 31 between two adjacent openings 40 along the first direction X. On the one hand, the rib structure 31 can improve the overall structural strength of the insulating support; on the other hand, when two adjacent battery cells 10 are fixed with adhesive, the rib structure 31 can act as a sealant, reducing the overflow of adhesive between the two adjacent battery cells 10.

[0159] In some embodiments, the heat exchange component 20 is fixedly connected to a plurality of battery cells 10 in the battery cell assembly 100.

[0160] The heat exchange component 20 can be directly connected to the battery cell 10, or it can be indirectly connected to the battery cell 10 through other components. As an example, the connection method between the heat exchange component 20 and the battery cell 10 can be, but is not limited to, bolt connection, plug-in connection, or adhesive connection.

[0161] By fixing the heat exchange component 20 to multiple battery cells 10, the overall structural stability of the battery cell assembly 100 can be improved, the relative displacement of the battery cells 10 under external conditions such as vibration and impact can be reduced, and the risk of connection failure due to loosening of the battery cells 10 can be reduced. In addition, the heat exchange component 20 can also effectively bear the expansion force of the battery cells 10 during the cycle, thereby improving the reliability and service life of the battery device 2.

[0162] In some embodiments, the number of battery cell assemblies 100 is multiple and distributed along a third direction Z. The heat exchange component 20 is fixedly connected to at least two partially adjacent battery cell assemblies 100, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0163] For example, the multiple sets of battery cell assemblies 100 include a first set of battery cell assemblies 100 and a second set of battery cell assemblies 100. The first set of battery cell assemblies 100 and the second set of battery cell assemblies 100 are arranged adjacent to each other along a third direction Z. The heat exchange component 20 is fixedly connected to the first set of battery cell assemblies 100 and the second set of battery cell assemblies 100.

[0164] By fixing the heat exchange component 20 to multiple battery cell modules 100, the overall structural stability of the battery cell module 100 can be improved, the risk of relative displacement of the battery cell module 100 under external working conditions such as vibration and impact can be reduced, and the overall mechanical strength and seismic performance of the battery device 2 can be improved.

[0165] In some embodiments, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0166] In some embodiments, the heat exchange component 20 and the electrode terminal 13 are arranged along a third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0167] This allows the heat exchange component 20 to adopt a simpler structural form, reducing manufacturing and assembly difficulties and thus effectively lowering production costs. At the same time, this structural layout enhances the versatility of the heat exchange component 20, further improving the economic efficiency of the battery device 2 during mass production.

[0168] For example, the heat exchange component 20 can adopt a serpentine tube structure, which is simple in structure and low in cost.

[0169] Figure 7 This is a partial top view of another battery device 2 provided in some embodiments of this application. Figure 8 This is a partial top view of another battery device 2 provided in some embodiments of this application.

[0170] Continue to refer to Figures 7 to 8 In some embodiments, the battery device 2 further includes a housing 60 having a receiving space, in which the battery cell assembly 100 is disposed, and the heat exchange component 20 is connected to the housing 60.

[0171] As an example, the housing 60 may include a first housing section and a second housing section. The first housing section and the second housing section are fastened together to form a closed space inside the housing 60 to house the battery cell assembly 100. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing section may be a top cover or a bottom plate 63.

[0172] As an example, the housing 60 may include a top cover, a frame, and a bottom plate 63. The top cover and the bottom plate 63 are respectively connected to the frame, so that the interior of the housing 60 forms an enclosed space to accommodate the battery cell assembly 100.

[0173] As an example, the housing 60 can be part of the vehicle's chassis structure. For instance, a portion of the housing 60 can be at least a part of the vehicle's floor, or a portion of the housing 60 can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0174] The heat exchange component 20 can be fixed to the housing 60 or detachably connected to the housing 60. The heat exchange component 20 can be directly connected to the housing 60 or constrained to the housing 60 by other components. As an example, the connection method between the heat exchange component 20 and the housing 60 can be, but is not limited to, welding, bolting, plugging, or bonding.

[0175] The above technical solution can improve the stability of the heat exchange component 20 and reduce the risk of the heat exchange component 20 loosening or shifting under long-term operation or external vibration and impact, so as to further improve the reliability of the battery device 2.

[0176] In some embodiments, the housing 60 includes a first beam 61 and a second beam 62, the first beam 61 and the second beam 62 are disposed within a receiving space, and the second beam 62 is disposed opposite to the first beam 61 along a first direction X, the battery cell assembly 100 is disposed between the first beam 61 and the second beam 62, and the heat exchange component 20 is connected to at least one of the first beam 61 and the second beam 62.

[0177] The heat exchange component 20 can be connected to one of the first beam 61 and the second beam 62, or it can be connected to both the first beam 61 and the second beam 62.

[0178] The heat exchange component 20 can be installed and fixed by relying on the first beam 61 and / or the second beam 62, thereby further improving its installation stability and vibration resistance.

[0179] In some embodiments, the first direction X is parallel to the expansion direction of the battery cell 10; in other words, the first direction X is parallel to the thickness direction of the battery cell 10. This allows the first beam 61 and the second beam 62 to effectively bear the expansion force of the battery cell 10 during cycling.

[0180] In some embodiments, the battery device 2 further includes a reinforcing member 70 extending along a first direction X, the reinforcing member 70 being connected to the heat exchange component 20, one end of the reinforcing member 70 along the first direction X being connected to a first beam 61, and the other end of the reinforcing member 70 along the first direction X being connected to a second beam 62.

[0181] Optionally, the reinforcing member 70 may be, but is not limited to, a plate-like structure, a column-like structure, or a block-like structure.

[0182] As an example, the reinforcing member 70 can be a steel strip.

[0183] The above technical solution, by introducing the reinforcing member 70, can significantly improve the stability and deformation resistance of the heat exchange component 20 under long-term use and external vibration and impact conditions; on the other hand, it can form a stable mechanical transmission path between the first beam 61 and the second beam 62, thereby improving the overall structural strength of the box 60.

[0184] In some embodiments, the housing 60 includes a base plate 63 located on the side of the battery cell assembly 100 along the second direction Y and facing away from the heat exchange component 20, and the battery cell assembly 100 is supported on the base plate 63.

[0185] The heat exchange component 20 is located on the side of the battery cell assembly 100 along the second direction Y and facing away from the base plate 63, which can reduce the risk of the heat exchange component 20 being impacted by the bottom ball and improve the reliability of the heat exchange component 20.

[0186] Figure 9Another battery device 2 provided for some embodiments of this application Figure 2 A schematic diagram of the cross-sectional structure at point AA. Figure 10 for Figure 9 A magnified schematic diagram of the structure at point N.

[0187] Continue to refer to Figures 9 to 10 In some embodiments, the battery device 2 further includes a second insulating component 80, which is disposed on the side of the first insulating component 30 along the third direction Z and close to the electrode terminal 13. The second insulating component 80 is disposed between the electrode terminal 13 and the heat exchange component 20, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0188] The second insulating component 80 forms an insulating barrier between the electrode terminal 13 and the heat exchange component 20, effectively preventing direct contact or potential discharge channels between them. This significantly improves the reliability of the battery device 2 under high-voltage, high-power operating conditions.

[0189] In some embodiments, the second insulating member 80 protrudes along the second direction Y from the side surface of the electrode terminal 13 facing away from the first wall 111, which can further improve the insulation protection effect of the second insulating member 80 between the electrode terminal 13 and the heat exchange member 20.

[0190] In some embodiments, the first insulating component 30 and the second insulating component 80 are connected, which not only improves the overall structural compactness, but also enhances the overall structural stability of the first insulating component 30 and the second insulating component 80.

[0191] The first insulating component 30 can be directly connected to the second insulating component 80, or it can be constrained to the second insulating component 80 by other components. As an example, the connection method between the first insulating component 30 and the second insulating component 80 can be, but is not limited to, plugging or bonding.

[0192] In some embodiments, the first insulating component 30 and the second insulating component 80 are integrally formed structures.

[0193] On the one hand, the manufacturing process is simplified because there is no need to connect the first insulating component 30 and the second insulating component 80 through an additional connection process. On the other hand, compared with connecting the first insulating component 30 and the second insulating component 80 through an additional connection process, the integrated structure of the first insulating component 30 and the second insulating component 80 has higher structural strength.

[0194] According to some embodiments of this application, this application also provides an electrical device, including a battery device 2 of any of the above schemes, the battery device 2 being used to store or provide electrical energy.

[0195] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. All technical features and optional technical features of this application can be combined to form new technical solutions.

[0196] To better understand the battery device 2 provided in the embodiments of this application, based on the same inventive concept, an embodiment of the battery device 2 in practical application is provided here for description.

[0197] This application provides a battery device 2, which includes multiple sets of battery cell assemblies 100, a heat exchange component 20, a first insulating component 30, and a heat conducting component 50. The multiple sets of battery cell assemblies 100 are distributed along a third direction Z. Each battery cell assembly 100 includes multiple battery cells 10 arranged along a first direction X. Each battery cell 10 includes a housing 11, an electrode assembly 12, and an electrode terminal 13. The housing 11 has a receiving cavity, and the electrode assembly 12 is disposed in the receiving cavity. The housing 11 includes a first wall 111, which is located on one side of the receiving cavity along a second direction Y. The electrode terminal 13 is disposed on the first wall 111 and is electrically connected to the electrode assembly 12. The first direction X, the second direction Y, and the third direction Z intersect each other.

[0198] The heat exchange component 20 is disposed on the side of the first wall 111 facing away from the receiving cavity. The heat exchange component 20 is fixedly connected to at least two partially adjacent sets of battery cell assemblies 100. The heat exchange component 20 is also fixedly connected to a plurality of battery cells 10 in each battery cell assembly 100.

[0199] At least a portion of the first insulating component 30 is disposed between the first wall 111 of the plurality of battery cells 10 and the heat exchange component 20. The first insulating component 30 has a plurality of openings 40 extending through itself in the second direction Y, and the openings 40 are located between the first wall 111 and the heat exchange component 20. A heat-conducting component 50 connects the heat exchange component 20 and the first wall 111, and at least a portion of the heat-conducting component 50 is disposed within the openings 40. The thermal conductivity of the heat-conducting component 50 is greater than that of the first insulating component 30. Each battery cell 10 has a plurality of spaced-apart openings 40 corresponding to its first wall 111, and each opening 40 is provided with a heat-conducting component 50.

[0200] The heat exchange component 20 is disposed on the side of the first wall 111 facing away from the receiving cavity, and can share part of the space on the side of the first wall 111 facing away from the receiving cavity with the electrode terminal 13, so as to reduce the space occupancy of the heat exchange component 20 along the second direction Y, thereby improving the energy density of the battery device 2. The first insulating component 30 can insulate the heat exchange component 20 from the first wall 111, reduce the risk of short circuit of the battery cell 10, and thus improve the reliability of the battery device 2.

[0201] The introduction of the heat-conducting component 50 can improve the heat exchange rate between the battery cell 10 and the heat exchange component 20, thereby improving the reliability of the battery device 2. Furthermore, the first insulating component 30 has an opening 40 to accommodate the heat-conducting component 50, which reduces the space occupancy of the heat-conducting component 50, especially along the second direction Y, thereby increasing the energy density of the battery device 2. Thus, the above technical solution can simultaneously improve the reliability and energy density of the battery device 2.

[0202] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0203] 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: A battery cell assembly includes a plurality of battery cells arranged along a first direction. Each battery cell includes a housing, an electrode assembly, and an electrode terminal. The housing has a receiving cavity, and the electrode assembly is disposed within the receiving cavity. The housing includes a first wall located on one side of the receiving cavity along a second direction. The electrode terminal is disposed on the first wall and electrically connected to the electrode assembly. The first direction and the second direction intersect. A heat exchange component is disposed on the side of the first wall facing away from the receiving cavity; A first insulating component is at least partially disposed between the first wall of the plurality of battery cells and the heat exchange component. The first insulating component has an opening that extends through itself along the second direction, and the opening is located between the first wall and the heat exchange component. A heat-conducting component is provided, which connects the heat exchange component and the first wall, and is at least partially disposed within the opening. The thermal conductivity of the heat-conducting component is greater than that of the first insulating component. Each of the battery cells has a plurality of spaced-apart openings on its first wall, and each opening is provided with a heat-conducting component.

2. The battery device according to claim 1, characterized in that, The number of openings is multiple, and at least a portion of the multiple openings are arranged along the circumferential edge of the electrode terminal.

3. The battery device according to claim 2, characterized in that, At least a portion of the plurality of openings are arranged around the electrode terminal.

4. The battery device according to claim 3, characterized in that, At least a portion of the plurality of openings are annular and arranged around the electrode terminal; and / or, Each of the battery cells has a plurality of openings corresponding to its electrode terminals, and these openings are spaced apart around the electrode terminals.

5. The battery device according to claim 1, characterized in that, The total projected area of ​​the opening along the second direction is S1, and the projected area of ​​the first insulating component along the second direction is S2, wherein 5%≤S1 / S2≤60%.

6. The battery device according to claim 1, characterized in that, The total projected area of ​​the opening along the second direction is S1, and the projected area of ​​the first wall along the second direction is S3, wherein 5%≤S1 / S3≤80%.

7. The battery device according to claim 1, characterized in that, The heat exchange component includes a heat exchange element and a temperature conducting element, the temperature conducting element being disposed between the heat exchange element and the first wall, and the heat exchange element forming at least a portion of a flow channel for accommodating the heat exchange medium; In the same plane perpendicular to the second direction, the projected area of ​​the temperature-conducting element is larger than the projected area of ​​the heat exchanger.

8. The battery device according to claim 1, characterized in that, The first insulating component includes a plurality of insulating sheets, each of which is disposed in a one-to-one correspondence with a plurality of battery cells. On each battery cell, the insulating sheet is disposed between the first wall and the heat exchange component.

9. The battery device according to claim 1, characterized in that, The first insulating component includes multiple insulating films, and each of the multiple insulating films is disposed in a one-to-one correspondence with a multiple of the battery cells; On each of the battery cells, a portion of the insulating film is connected to at least a portion of the outer surface of the housing, and another portion of the insulating film is disposed between the first wall and the heat exchange component.

10. The battery device according to claim 1, characterized in that, The battery device further includes a busbar component, the first insulating component includes an insulating support, the busbar component is fixed to the insulating support, the insulating support is connected to the first wall, and the busbar component is connected to the electrode terminals of a plurality of battery cells.

11. The battery device according to claim 10, characterized in that, Along the second direction, the projection of the opening lies within the projection range of the first wall.

12. The battery device according to claim 1, characterized in that, The heat exchange component is fixedly connected to multiple battery cells in the battery cell assembly.

13. The battery device according to claim 1, characterized in that, The number of battery cell assemblies is multiple and distributed along a third direction. The heat exchange component is fixedly connected to at least two partially adjacent sets of battery cell assemblies. The first direction, the second direction, and the third direction intersect each other.

14. The battery device according to claim 1, characterized in that, The heat exchange component and the electrode terminal are arranged along a third direction, and the first direction, the second direction and the third direction intersect each other.

15. The battery device according to claim 1, characterized in that, The battery device also includes a housing with a receiving space, in which the battery cell assembly is disposed, and the heat exchange component is connected to the housing.

16. The battery device according to claim 15, characterized in that, The housing includes a first beam and a second beam, which are disposed within the accommodating space. The second beam is disposed opposite to the first beam along the first direction. The battery cell assembly is disposed between the first beam and the second beam. The heat exchange component is connected to at least one of the first beam and the second beam.

17. The battery device according to claim 16, characterized in that, The battery device further includes a reinforcing member extending along the first direction, the reinforcing member being connected to the heat exchange component, one end of the reinforcing member being connected to the first beam along the first direction, and the other end of the reinforcing member being connected to the second beam along the first direction.

18. The battery device according to claim 15, characterized in that, The housing includes a base plate located on the side of the battery cell assembly along the second direction and facing away from the heat exchange component, and the battery cell assembly is supported on the base plate.

19. The battery device according to claim 1, characterized in that, The battery device further includes a second insulating component, which is disposed on the side of the first insulating component along a third direction and close to the electrode terminal. The second insulating component is disposed between the electrode terminal and the heat exchange component, and the first direction, the second direction and the third direction intersect each other.

20. The battery device according to claim 19, characterized in that, The second insulating component protrudes along the second direction from the side surface of the electrode terminal facing away from the first wall.

21. The battery device according to claim 20, characterized in that, The first insulating component and the second insulating component are connected.

22. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-21, the battery device being used to store or provide electrical energy.

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