Battery devices, electrical devices and energy storage devices

Abstract

This application relates to the field of battery technology and proposes a battery device, an electrical device, and an energy storage device. The battery device includes: a housing, including a first housing and a second housing, the second housing including a heat exchange assembly; a battery cell disposed along a first direction on the side of the heat exchange assembly facing the receiving space; an insulating film connected along the first direction to the side of the second housing facing the battery cell and covering the heat exchange assembly on the side of the heat exchange assembly facing the battery cell, the edge of the insulating film extending along a second direction between the first housing and the second housing and being clamped between the first housing and the second housing; in the battery device provided by the embodiments of this application, the edge of the insulating film is clamped at the connection part of the upper housing and the lower housing to separate the heat exchange assembly and the battery cell through the insulating film. In the event of heat exchange medium leakage, the insulating film can guide the heat exchange medium to flow to the edge of the housing and flow out from the gap between the upper housing and the lower housing to reduce the heat exchange medium accumulated in the housing.

Description

Technical Field

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

[0002] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0003] In current battery devices, the heat exchange medium in the heat exchange components is mostly liquid. In the event of a leak in the heat exchange medium, the heat exchange medium can easily spread to the battery cells and cause short circuits or damage to the battery cells. Utility Model Content

[0004] In view of the above problems, this application provides a battery device, an electrical device, and an energy storage device that can alleviate the problem of heat exchange medium leakage in heat exchange components damaging individual battery cells.

[0005] In a first aspect, embodiments of this application provide a battery device, comprising: The housing includes a first housing and a second housing, the second housing being connected to the first housing and forming an accommodating space. The second housing includes a heat exchange assembly; a battery cell being accommodated in the accommodating space and disposed along a first direction on the side of the heat exchange assembly facing the accommodating space; and an insulating film being connected along the first direction to the side of the second housing facing the battery cell and covering the heat exchange assembly on the side of the heat exchange assembly facing the battery cell. The edge of the insulating film extends along a second direction between the first housing and the second housing and is clamped between the first housing and the second housing, the second direction being perpendicular to the first direction.

[0006] In this embodiment, an insulating film is provided to insulate and separate the battery cells and the heat exchange assembly, reducing the risk of short circuit between the battery cells and the heat exchange assembly. The edge of the insulating film is clamped at the connection between the upper and lower housings to separate the heat exchange assembly and the battery cell assembly. In the event of heat exchange medium leakage, the insulating film can prevent the heat exchange medium from contacting the battery cells and can guide the heat exchange medium to flow to the edge of the housing and out through the gap between the upper and lower housings, thereby reducing the amount of heat exchange medium accumulated in the housing.

[0007] In some embodiments, the first housing includes a first connecting portion, the second housing includes a second connecting portion, the first connecting portion is connected to the second connecting portion to connect the first housing to the second housing; the orthographic projection of the insulating film along a first direction covers at least a portion of the first connecting portion, and / or, the orthographic projection of the insulating film along the first direction covers at least a portion of the second connecting portion.

[0008] In this embodiment, the insulating film covers at least a portion of the first connecting part and / or the second connecting part, so that the edge of the insulating film can be clamped by the first connecting part and the second connecting part. In the event of heat exchange medium leakage, the pressurized heat exchange medium can squeeze the insulating film at the first connecting part and the second connecting part and deform the insulating film, thereby squeezing out a microchannel between the first connecting part and the second connecting part so that the leaked heat exchange medium can be discharged outside the housing.

[0009] In some embodiments, the orthographic projection of the insulating film along the first direction covers the first connection portion, and / or, the orthographic projection of the insulating film along the first direction covers the second connection portion.

[0010] In the technical solution of this embodiment, the insulating film completely covers the first connecting part and / or the second connecting part, so that the first connecting part and the second connecting part can better fix the insulating film, and also so that the insulating film can better guide the heat exchange medium to the outside of the box.

[0011] In some embodiments, the battery device further includes a seal disposed between the first connection portion and the second connection portion, and an insulating film is sandwiched between the seal and the second connection portion.

[0012] In this embodiment, a sealing element is provided to improve the sealing effect between the first connecting part and the second connecting part; an insulating film is placed between the sealing element and the second connecting part so that the insulating film can guide the heat exchange medium to flow out of the box.

[0013] In some embodiments, the battery device further includes a connector that extends through and connects to the first connection portion and the second connection portion, and extends through the seal; an insulating film is located on the side of the connector facing the battery cell in a second direction.

[0014] In the technical solution of this embodiment, a connector is provided to connect the first connecting part, the sealing part, and the second connecting part; an insulating film is provided on the side of the connector facing the battery cell, so that the insulating film can be fixed by the first connecting part and the second connecting part, and the risk of damage to the insulating film can be reduced.

[0015] In some embodiments, the battery device further includes a connector that extends through and connects to the first connection portion and the second connection portion, and extends through the seal and the insulating film.

[0016] In the technical solution of this embodiment, a connector is provided to connect the first connecting part, the sealing part, the insulating film and the second connecting part; the connector passes through the insulating film to better fix the insulating film, and at the same time, the edge of the insulating film can extend to the edge of the box, so as to facilitate the insulating film to guide the heat exchange medium to flow out of the box.

[0017] In some embodiments, the first housing further includes a first main body portion, and a first connecting portion is disposed on the periphery of the first main body portion; and / or, the second housing further includes a second main body portion, and a second connecting portion is disposed on the periphery of the second main body portion.

[0018] The technical solution of this embodiment provides some specific structures of the box so that the first connecting part and the second connecting part can be connected to form a closed containment space.

[0019] In some embodiments, the second housing is a flat plate structure; or, the second housing is a basin-shaped structure, with at least a portion of the battery cell housed within the second housing.

[0020] The technical solution of this embodiment provides some specific structures for the second housing so that the setting of the insulating film can be adapted to different housing structures.

[0021] In some embodiments, the heat exchange assembly is connected to the first housing and forms a receiving space with the first housing, and the edge of the insulating film is clamped between the first housing and the heat exchange assembly.

[0022] In the technical solution of this embodiment, the heat exchange component is directly connected to the first housing. At this time, the heat exchange component can directly serve as the second housing and cooperate with the first housing to form an accommodating space, thereby simplifying the housing structure.

[0023] In some embodiments, the insulating film is an elastic structural member.

[0024] In this embodiment, the insulating film is made into an elastic structural component so that it can deform under the impact of the pressurized heat exchange medium. In the event of heat exchange medium leakage, the pressure of the heat exchange medium can cause the insulating film sandwiched between the first and second housings to deform, so as to form a microchannel through which the heat exchange medium can be discharged to the outside of the housing.

[0025] Secondly, embodiments of this application also provide an energy storage device, including the battery device provided in some embodiments of the first aspect.

[0026] Thirdly, embodiments of this application also provide an electrical device, including the battery device provided in some embodiments of the first aspect.

[0027] 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

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments; Figure 2 This is an exploded view of the battery device provided in some embodiments of this application; Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application; Figure 4 This is a perspective view of a battery device provided in some embodiments of this application; Figure 5 A perspective view of the battery device provided in some embodiments of this application after removing the first housing; Figure 6 An exploded view of the seal, insulating film, and second housing provided in some embodiments of this application; Figure 7 A perspective view of a sealing element, an insulating film, and a second housing provided in some embodiments of this application; Figure 8 for Figure 7 Cross-sectional view at line AA; Figure 9 for Figure 8 A magnified view of a portion of point B in the middle.

[0029] The markings in the diagram mean: 1000, vehicles; 100. Battery device; 10. Housing; 101. Accommodation space; 11. First housing; 111. First main body; 112. First connecting part; 12. Second housing; 121. Heat exchange assembly; 122. Second main body; 123. Second connecting part; 20. Battery cell; 21. Housing; 22. End cap; 23. Electrode assembly; 24. Electrode terminal; 30. Insulating film; 40. Seals; 50. Connectors; 200. Motor; 300. Controller. Detailed Implementation

[0030] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0032] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0033] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0041] In current battery devices, individual battery cells are typically fixed to the bottom of the casing and contacted or connected to a heat exchange assembly at the bottom of the casing to facilitate heat exchange between the assembly and the cell. The heat exchange medium in the heat exchange assembly is usually a liquid, such as water or refrigerant. In such battery devices, if the heat exchange assembly is damaged and the heat exchange medium leaks, the heat exchange medium can easily spread and contact the cell, potentially causing a short circuit and other damage to the cell.

[0042] In current battery devices, individual battery cells are typically fixed to the bottom of the housing or to the heat exchange components with adhesive, which provides some protection and barrier properties. However, the heat exchange medium can easily spread over the adhesive layer and come into contact with the battery cells, and the heat exchange medium can also cause the adhesive to deform and come into contact with the battery cells, resulting in poor barrier performance of the adhesive.

[0043] Based on the above considerations, in order to alleviate the problem of heat exchange medium leakage damaging battery cells in the heat exchange assembly, this application provides a battery device in which an insulating film is provided between the battery cells and the heat exchange assembly, and the edge of the insulating film extends between a first housing and a second housing, so that the first housing and the second housing clamp the edge of the insulating film. In such a battery device, the edge of the insulating film is clamped at the connection between the upper housing and the lower housing, so as to separate the heat exchange assembly and the battery cell assembly by means of the insulating film. In the event of heat exchange medium leakage, the insulating film can prevent the heat exchange medium from contacting the battery cells, and can guide the heat exchange medium to flow to the edge of the housing and flow out from the gap between the upper housing and the lower housing, so as to reduce the heat exchange medium accumulated in the housing.

[0044] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0045] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0046] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery is installed inside the vehicle 1000, and the battery can be located at the bottom, front, or rear of the vehicle 1000. The battery can be used to power the vehicle 1000; for example, the battery can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 300 and a motor 200. The controller 300 is used to control the battery to supply power to the motor 200, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0047] In some embodiments of this application, the battery can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0048] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0049] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0050] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0051] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed in the housing 10.

[0052] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0053] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0054] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0055] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to accommodate the battery cell assembly.

[0056] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0057] refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up a battery. As shown, the battery cell 20 includes an end cap 22, a housing 21, an electrode assembly 23, and other functional components.

[0058] End cap 22 refers to a component that covers the opening of housing 21 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 22 can be adapted to the shape of housing 21 to fit it. Optionally, end cap 22 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 22 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 24 can be provided on end cap 22. Electrode terminals 24 can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 22 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 22 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 22. The insulating element can be used to isolate the electrical connection components within the housing 21 from the end cap 22 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0059] The housing 21 is a component used to cooperate with the end cap 22 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 21 and the end cap 22 can be independent components. An opening can be provided on the housing 21, and the end cap 22 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 22 and the housing 21 can be integrated. Specifically, the end cap 22 and the housing 21 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 21, the end cap 22 closes the housing 21. The housing 21 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 21 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 21 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0060] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The housing 21 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, active ions (e.g., lithium ions) reversibly insert and extract between the positive and negative electrode sheets to achieve charging and discharging. The tabs connect to the electrode terminals 24 to form a current loop.

[0061] Firstly, reference Figures 4 to 6 This application provides a battery device 100, including a housing 10, a battery cell 20, and an insulating film 30. The housing 10 includes a first housing 11 and a second housing 12. The second housing 12 is connected to the first housing 11 and forms a receiving space 101. The second housing 12 includes a heat exchange assembly 121. The battery cell 20 is received in the receiving space 101 and is disposed along a first direction on the side of the heat exchange assembly 121 facing the receiving space 101. The insulating film 30 is connected along the first direction to the side of the second housing 12 facing the battery cell 20 and covers the heat exchange assembly 121 on the side facing the battery cell 20. The edge of the insulating film 30 extends along a second direction between the first housing 11 and the second housing 12 and is clamped between the first housing 11 and the second housing 12. The second direction is perpendicular to the first direction.

[0062] In the figure, the X-axis is the length direction of the battery device 100, the Y-axis is the width direction of the battery device 100, and the Z-axis is the height direction of the battery device 100.

[0063] The housing 10 refers to the structure in the battery device 100 that provides a space 101 for housing the battery cell 20 and other structures; the shape of the housing 10 can be prismatic, cylindrical or other shapes; the material of the housing 10 can include metal, plastic or other materials.

[0064] The first housing 11 and the second housing 12 are both parts of the housing 10. The first housing 11 refers to the structure in the housing 10 that forms the internal space of the housing 10, and the second housing 12 refers to the structure in the housing 10 that carries the battery cell 20 or other structures. When the housing 10 includes the first housing 11 and the second housing 12, the second housing 12 is used to accommodate the battery cell 20 and other structures, and the first housing 11 is used to cover and close the second housing 12. Depending on the shape of the housing 10, the first housing 11 can be prismatic, cylindrical, or other shapes, and the second housing 12 can be prismatic, cylindrical, or other shapes. The material of the first housing 11 can include metal, plastic, or other materials, and the material of the second housing 12 can include metal, plastic, or other materials.

[0065] The second housing 12 is connected to the first housing 11. The second housing 12 can be connected to the first housing 11 by screwing, riveting or other means.

[0066] The second housing 12 is connected to the first housing 11 and can form a receiving space 101. The receiving space 101 refers to the space structure in the housing 10 used to receive the battery cell 20 and other structures. The receiving space 101 is formed inside the housing 10. The receiving space 101 can be a prism-shaped space structure, a cylindrical space structure, or other shapes of space structures. The shape of the receiving space 101 can also be set according to the shape of the housing 10.

[0067] The heat exchange component 121 refers to the structure in the battery device 100 used for heat exchange with the battery cell 20. The heat exchange component 121 can exchange heat with the battery cell 20 to control the temperature of the battery cell 20. The heat exchange component 121 can both lower and raise the temperature of the battery cell 20. The heat exchange component 121 can be a plate-like structure, a pipe-like structure, or other shaped structural components. The heat exchange component 121 can contain a heat exchange medium to exchange heat with the battery cell 20 through the heat exchange medium. The heat exchange medium can include a liquid, gaseous, solid, or mixed medium.

[0068] The second housing 12 includes a heat exchange component 121. In this case, the second housing 12 can have an independent structure, and the heat exchange component 121 is located on the side of the second housing 12 facing the battery cell 20, or embedded in the second housing 12. The heat exchange component 121 can also be part of the second housing 12, that is, the heat exchange component 121 can not only exchange heat with the battery cell 20, but also provide support or bottom protection for the battery cell 20. The second housing 12 can also include only the heat exchange component 121, that is, the heat exchange component 121 can be the second housing 12.

[0069] A battery cell 20 refers to the smallest unit that makes up the battery device 100. The number of battery cells 20 can be one, two or more. When the number of battery cells 20 is at least two, the battery cells 20 can be connected in series, in parallel or in a mixed connection. The battery cells 20 can be arranged in one direction or in an array in two different directions. The battery cells 20 can be fixed and constrained by straps, plates or other structures. The battery cells 20 can also be directly placed in the housing space 101 of the housing 10.

[0070] The battery cell 20 is disposed along the first direction on the side of the heat exchange assembly 121 facing the receiving space 101, so as to facilitate heat exchange between the battery cell 20 and the heat exchange assembly 121; the first direction is the arrangement direction of the heat exchange assembly 121 and the battery cell 20, which can be the height direction Z of the battery device 100 or other directions; for example, the first direction is the height direction Z of the battery device 100.

[0071] The insulating film 30 refers to the structure in the battery device 100 used to separate the battery cell 20 and the heat exchange assembly 121. The insulating film 30 can not only physically separate the battery cell 20 and the heat exchange assembly 121, but also prevent the current flow between the battery cell 20 and the heat exchange assembly 121, so as to prevent the battery cell 20 and the heat exchange assembly 121 from short-circuiting. The insulating film 30 can be square, round or other shapes. The material of the insulating film 30 can include polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), biaxially oriented polypropylene (BOPP), biaxially oriented polyimide (BOPI) or other insulating materials.

[0072] An insulating film 30 is disposed on the side of the second housing 12 facing the battery cell 20. The insulating film 30 can be connected to the second housing 12 by bonding, screwing, pressing or other means. The insulating film 30 covers the heat exchange assembly 121 on the side of the heat exchange assembly 121 facing the battery cell 20 to separate the heat exchange assembly 121 and the battery cell 20, thereby reducing the risk of short circuit between the battery cell 20 and the heat exchange assembly 121.

[0073] When the heat exchange assembly 121 is located on the side of the second housing 12 facing the battery cell 20, the heat exchange assembly 121 may only cover a portion of the surface of the second housing 12 facing the battery cell 20. In this case, a portion of the insulating film 30 may be connected to the heat exchange assembly 121, and another portion of the insulating film 30 may be connected to the second housing 12. Alternatively, the heat exchange assembly 121 may cover the entire surface of the second housing 12 facing the battery cell 20. In this case, the insulating film 30 may only be connected to the heat exchange assembly 121.

[0074] The edge of the insulating film 30 extends between the first housing 11 and the second housing 12 and is held between the first housing 11 and the second housing 12. That is, when the first housing 11 is connected to the second housing 12, the edge of the insulating film 30 can be held between the first housing 11 and the second housing 12, that is, the edge of the insulating film 30 can extend to the edge of the housing 10. At this time, the insulating film 30 can separate the battery cells 20 and the heat exchange assembly 121 on both sides along the first direction. In the event of leakage of the heat exchange medium of the heat exchange assembly 121, the heat exchange medium is unlikely to bypass the insulating film 30 and spread to the side where the battery cells 20 are located.

[0075] The edge of the insulating film 30 extends along the second direction to the space between the first housing 11 and the second housing 12. The second direction is perpendicular to the first direction. At this time, the second direction may include the length direction X of the battery device 100, the width direction Y of the battery device 100, or other directions perpendicular to the first direction, so that each edge of the insulating film 30 can extend to the edge of the housing 10 and be clamped by the first housing 11 and the second housing 12.

[0076] Because the insulating film 30 is connected to the second housing 12 and covers the heat exchange assembly 121 on the side facing the battery cell 20, in the event of heat exchange medium leakage, the insulating film 30 can suppress further leakage of the heat exchange medium without detaching from the heat exchange assembly 121. At this time, the heat exchange medium is unlikely to spread to the side of the insulating film 30 facing the battery cell 20, thereby protecting the battery cell 20.

[0077] In the event of heat exchange medium leakage, as the heat exchange medium leaks, it can gradually cause the connection between the insulating film 30 and the second housing 12, and between the insulating film 30 and the heat exchange assembly 121 to fail. At this time, the heat exchange medium will spread on the side of the insulating film 30 away from the battery cell 20. Because the edge of the insulating film 30 is held by the first housing 11 and the second housing 12, the heat exchange medium is difficult to bypass the insulating film 30 and spread to the side of the battery cell 20, thus protecting the battery cell 20. Furthermore, because the heat exchange medium in the heat exchange assembly 121 carries pressure, the pressurized heat exchange medium can spread to the connection between the first housing 11 and the second housing 12. The pressurized heat exchange medium can also deform the insulating film 30 between the first housing 11 and the second housing 12, and can form a channel at the insulating film 30 between the first housing 11 and the second housing 12 for the heat exchange medium to exit the housing 10.

[0078] When the insulating film 30 is sandwiched between the first housing 11 and the second housing 12, the insulating film 30 can also serve as a sealing structure to improve the sealing effect of the connection between the first housing 11 and the second housing 12.

[0079] In this embodiment, an insulating film 30 is provided to insulate and separate the battery cell 20 and the heat exchange assembly 121, reducing the risk of short circuit between the battery cell 20 and the heat exchange assembly 121. The edge of the insulating film 30 is clamped at the connection between the upper housing 10 and the lower housing 10 to separate the heat exchange assembly 121 and the battery cell assembly. In the event of heat exchange medium leakage, the insulating film 30 can prevent the heat exchange medium from contacting the battery cell 20 and can guide the heat exchange medium to flow to the edge of the housing 10 and flow out from the gap between the upper housing 10 and the lower housing 10, thereby reducing the heat exchange medium accumulated in the housing 10.

[0080] refer to Figures 4 to 6 In some embodiments, the first housing 11 includes a first connecting portion 112, and the second housing 12 includes a second connecting portion 123. The first connecting portion 112 is connected to the second connecting portion 123 to connect the first housing 11 to the second housing 12. The orthographic projection of the insulating film 30 along the first direction covers at least a portion of the first connecting portion 112, and / or the orthographic projection of the insulating film 30 along the first direction covers at least a portion of the second connecting portion 123.

[0081] The first connecting part 112 refers to the part of the first housing 11 that is connected to the second housing 12. The first connecting part 112 can be a flange structure relative to the first housing 11, or it can be other structures. The first connecting part 112 can also be integrally formed with the first housing 11, or it can be connected to the first housing 11 by welding, bonding or other means.

[0082] The second connecting part 123 refers to the part of the second housing 12 that is connected to the second housing 12. The second connecting part 123 can be a flange structure relative to the second housing 12, or it can be other structures. The second connecting part 123 can also be integrally formed with the second housing 12, or it can be connected to the second housing 12 by welding, bonding or other means.

[0083] The first connecting part 112 is connected to the second connecting part 123. The first connecting part 112 can also be connected to the second connecting part 123 by screwing, riveting or other means, so that the first housing 11 is connected to the second housing 12.

[0084] The orthographic projection of the insulating film 30 along the first direction covers at least a portion of the first connecting portion 112, that is, the orthographic projection of the insulating film 30 along the first direction can cover only a portion of the first connecting portion 112, or the orthographic projection of the insulating film 30 along the first direction can completely cover the first connecting portion 112.

[0085] The orthographic projection of the insulating film 30 along the first direction covers at least a portion of the second connecting portion 123, that is, the orthographic projection of the insulating film 30 along the first direction can cover only a portion of the second connecting portion 123, or the orthographic projection of the insulating film 30 along the first direction can completely cover the second connecting portion 123.

[0086] The orthographic projection of the insulating film 30 along the first direction covers at least a portion of the first connecting portion 112, that is, the insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123.

[0087] When the orthographic projection of the insulating film 30 along the first direction only covers a portion of the first connecting portion 112 and the second connecting portion 123, the insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123, and the edge of the insulating film 30 does not extend to the edge of the first connecting portion 112 and the second connecting portion 123 facing outwards from the housing 10; in the case of heat exchange medium leakage, the leaked heat exchange medium is difficult to spread to the battery cell 20 due to the obstruction of the insulating film 30, the leaked heat exchange medium can flow to the edge of the insulating film 30, and the pressure carried by the heat exchange medium can deform the insulating film 30 so that the heat exchange medium can flow between the first connecting portion 112 and the second connecting portion 123, and finally flow outwards from the housing 10.

[0088] When the orthographic projection of the insulating film 30 along the first direction completely covers the first connecting portion 112 and the second connecting portion 123, the insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123, and the edge of the insulating film 30 extends to the edge of the first connecting portion 112 and the second connecting portion 123 facing outward from the housing 10; in the case of heat exchange medium leakage, the leaked heat exchange medium is difficult to spread to the battery cell 20 due to the obstruction of the insulating film 30, the leaked heat exchange medium can flow to the edge of the insulating film 30, and the pressure carried by the heat exchange medium can deform the insulating film 30 so that the heat exchange medium can flow outward from the housing 10.

[0089] For example, the orthographic projection of the insulating film 30 along the first direction completely covers the first connecting portion 112 and the second connecting portion 123. The insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123, and the edge of the insulating film 30 is flush with the edge of the first connecting portion 112 facing outward from the housing 10 and the edge of the second connecting portion 123 facing outward from the housing 10.

[0090] In this embodiment, the insulating film 30 covers at least a portion of the first connecting portion 112 and / or the second connecting portion 123, such that the edge of the insulating film 30 can be clamped by the first connecting portion 112 and the second connecting portion 123. In the event of heat exchange medium leakage, the pressurized heat exchange medium can compress and deform the insulating film 30 at the first connecting portion 112 and the second connecting portion 123, thereby extruding a microchannel between the first connecting portion 112 and the second connecting portion 123 to facilitate the leakage of heat exchange medium to the outside of the housing 10.

[0091] refer to Figures 4 to 6 In some embodiments, the orthographic projection of the insulating film 30 along the first direction covers the first connecting portion 112, and / or the orthographic projection of the insulating film 30 along the first direction covers the second connecting portion 123.

[0092] The orthographic projection of the insulating film 30 along the first direction covers the first connecting portion 112, that is, the orthographic projection of the insulating film 30 along the first direction completely covers the first connecting portion 112.

[0093] The orthographic projection of the insulating film 30 along the first direction covers the second connecting portion 123, that is, the orthographic projection of the insulating film 30 along the first direction completely covers the second connecting portion 123.

[0094] The orthographic projection of the insulating film 30 along the first direction covers the first connecting portion 112, that is, the insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123.

[0095] When the orthographic projection of the insulating film 30 along the first direction completely covers the first connecting portion 112 and the second connecting portion 123, the insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123, and the edge of the insulating film 30 extends to the edge of the first connecting portion 112 and the second connecting portion 123 facing outward from the housing 10. At this time, the edge of the insulating film 30 can be flush with the edge of the first connecting portion 112 facing outward from the housing 10 and the edge of the second connecting portion 123 facing outward from the housing 10. The insulating film 30 can also extend beyond the edge of the first connecting portion 112 facing outward from the housing 10 and the edge of the second connecting portion 123 facing outward from the housing 10 and extend outward from the housing 10.

[0096] For example, the orthographic projection of the insulating film 30 along the first direction completely covers the first connecting portion 112 and the second connecting portion 123. The insulating film 30 is sandwiched between the first connecting portion 112 and the second connecting portion 123, and the edge of the insulating film 30 is flush with the edge of the first connecting portion 112 facing outward from the housing 10 and the edge of the second connecting portion 123 facing outward from the housing 10.

[0097] In the event of heat exchange medium leakage, the leaked heat exchange medium is difficult to spread to the battery cell 20 due to the obstruction of the insulating film 30. The leaked heat exchange medium can flow to the edge of the insulating film 30, and the pressure carried by the heat exchange medium can deform the insulating film 30 so that the heat exchange medium can flow outside the housing 10.

[0098] In this embodiment, the insulating film 30 completely covers the first connecting portion 112 and / or the second connecting portion 123, so that the first connecting portion 112 and the second connecting portion 123 can better fix the insulating film 30, and also so that the insulating film 30 can better guide the heat exchange medium to the outside of the housing 10.

[0099] refer to Figures 5 to 9 In some embodiments, the battery device 100 further includes a seal 40 disposed between the first connecting portion 112 and the second connecting portion 123, and an insulating film 30 is sandwiched between the seal 40 and the second connecting portion 123.

[0100] The seal 40 refers to the structure in the battery device 100 used to seal the connection between the first housing 11 and the second housing 12. The seal 40 can be a strip-shaped structure, a ring-shaped structure, or a structure of other shapes. The material of the seal 40 can include metal, rubber, or other materials.

[0101] The sealing element 40 is disposed between the first connecting part 112 and the second connecting part 123. The sealing element 40 can be connected to the first connecting part 112 or the second connecting part 123. In this case, the sealing element 40 can be connected to the first connecting part 112 and / or the second connecting part 123 by bonding, screwing, snapping or other means. The sealing element 40 can also be clamped by the first connecting part 112 and the second connecting part 123 to achieve fixation.

[0102] The insulating film 30 is sandwiched between the seal 40 and the second connection 123, that is, the edge of the insulating film 30 is located on the side of the seal 40 away from the first connection 112; when the edge of the insulating film 30 extends between the first housing 11 and the second housing 12, the insulating film 30 is sandwiched between the seal 40 and the second connection 123.

[0103] Since the second housing 12 includes a heat exchange assembly 121, which is located on the side of the insulating film 30 facing the second housing 12 and away from the first housing 11, the insulating film 30 is disposed between the seal 40 and the second connection 123. This allows the leaked heat exchange medium to flow directly to the outside of the housing 10 on the side of the insulating film 30 away from the battery cell 20, and makes it difficult for the leaked heat exchange medium to come into contact with the seal 40. This reduces the risk of the heat exchange medium damaging the seal 40 and also reduces the negative impact of the leakage of the heat exchange medium on the sealing performance of the housing 10.

[0104] In this embodiment, a sealing element 40 is provided to improve the sealing effect between the first connecting part 112 and the second connecting part 123; an insulating film 30 is provided between the sealing element 40 and the second connecting part 123 so that the insulating film 30 can guide the heat exchange medium to flow out of the housing 10.

[0105] refer to Figures 4 to 6 In some embodiments, the battery device 100 further includes a connector 50 that passes through and connects to the first connecting portion 112 and the second connecting portion 123, and passes through the seal 40; the insulating film 30 is located on the side of the connector 50 facing the battery cell 20 in the second direction.

[0106] The connector 50 refers to the structure in the battery device 100 used to connect the first housing 11 and the second housing 12. The connector 50 may include bolts, rivets, or other structures. The connector 50 is connected to the first connecting part 112 and the second connecting part 123. The connector 50 may pass through the first connecting part 112 and the second connecting part 123 and press the first connecting part 112 against the second connecting part 123. The connector 50 may also be welded to the first connecting part 112 and the second connecting part 123 respectively to achieve connection. The connector 50 may also be connected to the first connecting part 112 and the second connecting part 123 in other ways. The number of connectors 50 may be one, two, or more. The material of the connector 50 may include metal, plastic, or other materials.

[0107] The connector 50 passes through the first connecting portion 112 and the second connecting portion 123 to fix the first connecting portion 112 and the second connecting portion 123.

[0108] For example, the connector 50 can be a bolt, with the head of the bolt located at one end of the first connecting portion 112 away from the second connecting portion 123 and pressed against the first connecting portion 112. The bolt shank passes through the first connecting portion 112 and the second connecting portion 123 and extends to the side of the second connecting portion 123 away from the first connecting portion 112. The nut is threaded onto the shank and pressed against the second connecting portion 123. At this time, the nut and the bolt head clamp the first connecting portion 112 and the second connecting portion 123 to achieve fixation.

[0109] The connector 50 also extends through the seal 40 to better secure the seal 40 between the first connector 112 and the second connector 123.

[0110] The insulating film 30 is located on the side of the connector 50 facing the battery cell 20 along the second direction, that is, the edge of the insulating film 30 is located on the side of the connector 50 facing the battery cell 20, and the connector 50 does not penetrate the insulating film 30; under this arrangement, the insulating film 30 is not easily damaged by the connector 50, thereby improving the integrity of the insulating film 30.

[0111] In the event of heat exchange medium leakage, the leaked heat exchange medium is difficult to spread to the battery cell 20 due to the obstruction of the insulating film 30. The leaked heat exchange medium can flow to the edge of the insulating film 30, and the pressure carried by the heat exchange medium can deform the insulating film 30 so that the heat exchange medium can flow between the first connection part 112 and the second connection part 123, and finally flow outside the housing 10.

[0112] In this embodiment, a connector 50 is provided to connect the first connecting part 112, the sealing part 40, and the second connecting part 123. An insulating film 30 is provided on the side of the connector 50 facing the battery cell 20, so that the insulating film 30 can be fixed by the first connecting part 112 and the second connecting part 123, and the risk of damage to the insulating film 30 can be reduced.

[0113] refer to Figure 4 , Figures 7 to 9 In some embodiments, the battery device 100 further includes a connector 50 that passes through and connects to the first connecting portion 112 and the second connecting portion 123, and passes through the seal 40 and the insulating film 30.

[0114] The connector 50 refers to the structure in the battery device 100 used to connect the first housing 11 and the second housing 12. The connector 50 may include bolts, rivets, or other structures. The connector 50 is connected to the first connecting part 112 and the second connecting part 123. The connector 50 may pass through the first connecting part 112 and the second connecting part 123 and press the first connecting part 112 against the second connecting part 123. The connector 50 may also be welded to the first connecting part 112 and the second connecting part 123 respectively to achieve connection. The connector 50 may also be connected to the first connecting part 112 and the second connecting part 123 in other ways. The number of connectors 50 may be one, two, or more. The material of the connector 50 may include metal, plastic, or other materials.

[0115] The connector 50 passes through the first connecting portion 112 and the second connecting portion 123 to fix the first connecting portion 112 and the second connecting portion 123.

[0116] For example, the connector 50 can be a bolt, with the head of the bolt located at one end of the first connecting portion 112 away from the second connecting portion 123 and pressed against the first connecting portion 112. The bolt shank passes through the first connecting portion 112 and the second connecting portion 123 and extends to the side of the second connecting portion 123 away from the first connecting portion 112. The nut is threaded onto the shank and pressed against the second connecting portion 123. At this time, the nut and the bolt head clamp the first connecting portion 112 and the second connecting portion 123 to achieve fixation.

[0117] The connector 50 also extends through the seal 40 to better secure the seal 40 between the first connector 112 and the second connector 123.

[0118] The connector 50 also extends through the insulating film 30 to better secure the insulating film 30 between the first connecting portion 112 and the second connecting portion 123.

[0119] When the connector 50 penetrates the insulating film 30, the edge of the insulating film 30 can extend to the side of the connector 50 away from the battery cell 20. At this time, the edge of the insulating film 30 can extend to the edge of the first connection portion 112 and / or the second connection portion 123, so that the leaked heat exchange medium can flow directly along the insulating film 30 to the outside of the housing 10.

[0120] In this embodiment, a connector 50 is provided to connect the first connecting part 112, the sealing part 40, the insulating film 30, and the second connecting part 123. The connector 50 passes through the insulating film 30 to better fix the insulating film 30, and also allows the edge of the insulating film 30 to extend to the edge of the housing 10, thereby facilitating the insulation film 30 to guide the heat exchange medium to flow out of the housing 10.

[0121] refer to Figures 4 to 6 In some embodiments, the first housing 11 further includes a first main body 111, and a first connecting portion 112 is disposed on the periphery of the first main body 111; and / or, the second housing 12 further includes a second main body 122, and a second connecting portion 123 is disposed on the periphery of the second main body 122.

[0122] The first main body 111 refers to the structure in the first housing 11 used to provide protection for the battery cell 20 or other structures. The first main body 111 can be a flat structure, a basin-shaped structure, or other shaped structures. The material of the first main body 111 can include metal, plastic, or other materials.

[0123] The first connecting part 112 is connected to the first main body part 111. The first connecting part 112 can be connected to the first main body part 111 by welding, bonding or other means. The first connecting part 112 can also be integrally formed with the first main body part 111.

[0124] When the first main body 111 has a basin-shaped structure, the first connecting part 112 can be the flange of the first main body 111; when the first main body 111 has a flat plate structure, the first connecting part 112 and the first main body 111 can each be part of the flat plate structure.

[0125] The first connecting portion 112 is disposed around the periphery of the first main body portion 111, that is, the first connecting portion 112 is disposed around the first main body portion 111.

[0126] For example, the first main body 111 has a basin-shaped structure, the first connecting part 112 is the flange of the first main body 111, and the first connecting part 112 is arranged around the first main body 111.

[0127] The second main body 122 refers to the structure in the second housing 12 that provides support for the battery cell 20 or other structures. The second main body 122 can be a flat plate structure, a basin-shaped structure, or other shaped structures. The material of the second main body 122 can include metal, plastic, or other materials.

[0128] The second connecting part 123 is connected to the second main body part 122. The second connecting part 123 can be connected to the second main body part 122 by welding, bonding or other means. The second connecting part 123 can also be integrally formed with the second main body part 122.

[0129] When the second main body 122 has a basin-shaped structure, the second connecting part 123 can be a flange of the second main body 122; when the second main body 122 has a flat plate structure, the second connecting part 123 and the second main body 122 can each be part of a flat plate structure.

[0130] The second connecting part 123 is provided on the periphery of the second main body part 122, that is, the second connecting part 123 is provided around the second main body part 122.

[0131] For example, the second main body 122 is a flat plate structure, and the second connecting part 123 and the second main body 122 are each part of the flat plate structure. The second connecting part 123 is arranged around the first main body 111.

[0132] When the second connecting part 123 is connected to the first connecting part 112, the first connecting part 112 and the second connecting part 123 surround the first main body 111 and the second main body 122 respectively. At this time, the periphery of the first box 11 and the second box 12 can be connected, thereby forming a relatively closed accommodating space 101.

[0133] With the first connecting portion 112 and the second connecting portion 123 surrounding the first main body portion 111 and the second main body portion 122 respectively, the edges of the insulating film 30 can extend to the space between the first connecting portion 112 and the second connecting portion 123 to form a relatively enclosed space on the side of the insulating film 30 away from the battery cell 20, thereby reducing the risk of leaked heat exchange medium spreading to the side of the battery cell 20.

[0134] This embodiment provides some specific structures of the box 10 so that the first connecting part 112 and the second connecting part 123 can be connected to form a closed accommodating space 101.

[0135] refer to Figures 5 to 9In some embodiments, the second housing 12 is a flat plate structure; or, the second housing 12 is a basin-shaped structure, and at least a portion of the battery cell 20 is accommodated within the second housing 12.

[0136] The second housing 12 can be a flat plate structure, that is, the second housing 12 is a flat or roughly flat plate structure. In this case, the second housing 12 can mainly provide support for the battery cell 20 and can also protect the battery cell 20.

[0137] When the second housing 12 is a flat plate structure, the first housing 11 can be a basin-shaped structure. In this case, the first housing 11 has a space with an opening at one end. The first housing 11 is mainly used to provide space for the battery cell 20 and protect the battery cell 20. When the first housing 11 is connected to the second housing 12, the second housing 12 covers the opening of the first housing 11 and forms a receiving space 101.

[0138] When the second housing 12 has a flat plate structure, the insulating film 30 covers the side of the second housing 12 facing the battery cell 20. In this case, the insulating film 30 can also be a planar or approximately planar structure.

[0139] The second housing 12 can also be a basin-shaped structure. In this case, the second housing 12 has a space with an opening at one end. The second housing 12 can not only provide support for the battery cell 20, but also provide space for the battery cell 20 and protect the battery cell 20.

[0140] When the second box 12 has a basin-shaped structure, the first box 11 can also have a basin-shaped structure or a flat plate structure; when the first box 11 is connected to the second box 12, the second box 12 covers the opening of the first box 11 and forms a receiving space 101.

[0141] When the second housing 12 has a basin-shaped structure, the insulating film 30 covers the side of the second housing 12 facing the battery cell 20. In order to prevent the leaked heat exchange medium from spreading to the battery cell 20 and to discharge the heat exchange medium outside the housing 10, the insulating film 30 should cover the inner surface of the second housing 12. At this time, the insulating film 30 covers the entire inner side of the second housing 12, and the insulating film 30 is also basin-shaped.

[0142] This embodiment provides some specific structures for the second housing 12 so that the insulating film 30 can be adapted to different housing 10 structures.

[0143] refer to Figure 7 , Figure 8 In some embodiments, the heat exchange assembly 121 is connected to the first housing 11 and forms a receiving space 101 with the first housing 11, and the edge of the insulating film 30 is clamped between the first housing 11 and the heat exchange assembly 121.

[0144] The heat exchange component 121 is connected to the first housing 11. At this time, the second housing 12 may only include the heat exchange component 121, that is, the heat exchange component 121 directly serves as the second housing 12. The second housing 12 may also include other structures.

[0145] For example, the second housing 12 includes only the heat exchange assembly 121, which directly serves as the second housing 12. The heat exchange assembly 121 can exchange heat with the battery cell 20, provide support and protection for the battery cell 20, and simplify the structure of the housing 10, thereby reducing the overall weight of the battery device 100.

[0146] The heat exchange assembly 121 is connected to the first housing 11. In addition to exchanging heat with the battery cell 20, the heat exchange assembly 121 can also provide support for the battery cell 20. The insulating film 30 covers the side of the heat exchange assembly 121 facing the battery cell 20.

[0147] In this embodiment, the heat exchange component 121 is directly connected to the first housing 11. At this time, the heat exchange component 121 can directly serve as the second housing 12 and cooperate with the first housing 11 to form an accommodating space 101, thereby simplifying the structure of the housing 10.

[0148] In some embodiments, the insulating film 30 is an elastic structural member.

[0149] The insulating film 30 is an elastic structural component, meaning that the insulating film 30 can deform under external pressure and recover after the pressure is removed; the material of the insulating film 30 may include silicone rubber, fluororubber, polyurethane rubber or other elastic insulating materials.

[0150] When the edge of the insulating membrane 30 is clamped between the first housing 11 and the second housing 12, the leaked heat exchange medium can flow along the insulating membrane 30 to its edge and to the connection between the first housing 11 and the second housing 12. Because the heat exchange medium in the heat exchange assembly 121 carries a certain pressure, this pressure can cause the insulating membrane 30 to deform and form a gap between the insulating membrane 30 and the second housing 12, from which the heat exchange medium can flow out. After the heat exchange medium flows out, the insulating membrane 30 can recover and re-adhere to the second housing 12 under its own elasticity to seal the connection between the first housing 11 and the second housing 12.

[0151] When the edge of the insulating film 30 is clamped between the first housing 11 and the second housing 12, the insulating film 30 can undergo a certain deformation and better fit with the first housing 11 and the second housing 12 to compensate for the minor unevenness, burrs and other structures generated during the processing of the first housing 11 and the second housing 12, thereby improving the sealing performance of the connection between the first housing 11 and the second housing 12.

[0152] In this embodiment, the insulating film 30 is made into an elastic structural member so that the insulating film 30 can deform under the impact of the pressurized heat exchange medium; in the event of heat exchange medium leakage, the pressure of the heat exchange medium can cause the insulating film 30 sandwiched between the first housing 11 and the second housing 12 to deform, so as to form a microchannel through which the heat exchange medium can be discharged to the outside of the housing 10.

[0153] In some embodiments, the battery device 100 includes a housing 10, a battery cell 20, an insulating film 30, and a seal 40.

[0154] The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 has a basin-shaped structure and a space with an opening at one end. The second housing 12 includes a heat exchange assembly 121, which has a plate-shaped structure and serves as the second housing 12. The heat exchange assembly 121 covers the opening of the first housing 11, and the periphery of the heat exchange assembly 121 is connected to the periphery of the first housing 11 to form a closed accommodating space 101.

[0155] An annular seal 40 is provided at the connection between the heat exchange assembly 121 and the first housing 11, and the seal 40 is clamped between the heat exchange assembly 121 and the first housing 11.

[0156] The insulating film 30 covers the heat exchange assembly 121, and the peripheral edges of the insulating film 30 extend between the heat exchange assembly 121 and the seal 40, and are held by the heat exchange assembly 121 and the seal 40.

[0157] The battery cell 20 is disposed on the side of the insulating film 30 away from the heat exchange assembly 121 and is housed in the housing space 101.

[0158] Secondly, embodiments of this application also provide an energy storage device, including the battery device 100 provided in some embodiments of the first aspect.

[0159] In this energy storage device, the heat exchange medium leaked from the heat exchange component 121 is unlikely to spread to the battery cell 20, and the leaked heat exchange medium can be discharged outside the housing 10, reducing the risk of heat exchange medium accumulating in the housing 10 and damaging the battery cell 20 or other structures.

[0160] Thirdly, embodiments of this application also provide an electrical device, including the battery device 100 provided in some embodiments of the first aspect.

[0161] In this electrical device, the heat exchange medium leaked from the heat exchange component 121 is unlikely to spread to the battery cell 20, and the leaked heat exchange medium can be discharged outside the housing 10, reducing the risk of heat exchange medium accumulating in the housing 10 and damaging the battery cell 20 or other structures.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes a first enclosure and a second enclosure, the second enclosure being connected to the first enclosure and forming an accommodating space, and the second enclosure including a heat exchange assembly; A single battery cell is housed in the housing space and disposed along a first direction on the side of the heat exchange assembly facing the housing space; An insulating film is connected along the first direction to the side of the second housing facing the battery cell and covers the heat exchange assembly on the side of the heat exchange assembly facing the battery cell. The edge of the insulating film extends along the second direction between the first housing and the second housing and is clamped between the first housing and the second housing. The second direction is perpendicular to the first direction.

2. The battery device according to claim 1, characterized in that, The first housing includes a first connecting portion, and the second housing includes a second connecting portion. The first connecting portion is connected to the second connecting portion to connect the first housing to the second housing. The orthographic projection of the insulating film along the first direction covers at least a portion of the first connection portion, and / or the orthographic projection of the insulating film along the first direction covers at least a portion of the second connection portion.

3. The battery device according to claim 2, characterized in that, The insulating film, when projected along the first direction, covers the first connecting portion, and / or the insulating film, when projected along the first direction, covers the second connecting portion.

4. The battery device according to claim 2, characterized in that, The battery device further includes a seal disposed between the first connecting portion and the second connecting portion, and the insulating film is sandwiched between the seal and the second connecting portion.

5. The battery device according to claim 4, characterized in that, The battery device further includes a connector that passes through and connects the first connecting portion and the second connecting portion, and also passes through the seal. The insulating film is located on the side of the connector facing the battery cell along the second direction.

6. The battery device according to claim 4, characterized in that, The battery device further includes a connector that passes through and connects the first connection portion and the second connection portion, and passes through the seal and the insulating film.

7. The battery device according to any one of claims 2-6, characterized in that, The first housing further includes a first main body portion, and the first connecting portion is disposed on the periphery of the first main body portion; and / or The second housing also includes a second main body, and the second connecting part is disposed on the periphery of the second main body.

8. The battery device according to claim 1, characterized in that, The second housing is a flat panel structure; or The second housing has a basin-shaped structure, and at least a portion of the battery cell is housed within the second housing.

9. The battery device according to claim 1, characterized in that, The heat exchange assembly is connected to the first housing and together with the first housing form the receiving space, and the edge of the insulating film is clamped between the first housing and the heat exchange assembly.

10. The battery device according to claim 1, characterized in that, The insulating film is an elastic structural component.

11. An energy storage device, characterized in that, Includes the battery device as described in any one of claims 1-10.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-10.

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