Battery device, energy storage device, energy storage system and charging network

Abstract

The utility model discloses a battery device, an energy storage device, an energy storage system and a charging network. The battery device provided by the utility model comprises a box body, wherein the box body comprises a first wall; the battery assembly is arranged in the box body; the heat exchange tube assembly is used for carrying out heat exchange with the battery assembly, the heat exchange tube assembly comprises a first part and a second part, tube cavities of the first part and the second part are communicated with each other, the first part is accommodated in the box body, the second part is arranged outside the box body, and the first part and the second part are integrated; and the sealing element is arranged on the first wall, and the sealing element is connected between the heat exchange tube assembly and the box body in a sealing manner. One part of the heat exchange tube assembly is arranged outside the box body, under the condition that the size of the box body is not changed, the saved space can be used for arranging more battery assemblies, the space utilization rate of the box body can be improved, the sealing piece is connected between the heat exchange tube assembly and the box body in a sealed mode, and the heat exchange efficiency is improved. And the battery assembly in the box body can be better protected.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices, energy storage devices, energy storage systems and charging networks. Background Technology

[0002] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0003] In battery-powered new energy vehicles, batteries can provide all or part of the power. In the field of energy storage, batteries can be installed in energy storage enclosures or directly on the user side. With the development of battery technology, improving the reliability of battery devices is one of the key research topics in the industry. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application provides a battery device, an energy storage device, an energy storage system, and a charging network. The battery device of this application has good sealing performance, high energy density, and good reliability.

[0005] This application is achieved through the following technical solution.

[0006] A first aspect of this application provides a battery device, comprising: a housing, a battery assembly, a heat exchange tube assembly, and a sealing element. The housing includes a first wall; the battery assembly is disposed within the housing; the heat exchange tube assembly is used for heat exchange with the battery assembly, the heat exchange tube assembly including a first portion and a second portion whose cavities are interconnected, the first portion being housed within the housing, and the second portion being disposed outside the housing, the first portion and the second portion being integral; the sealing element is disposed on the first wall, and the sealing element is sealingly connected between the heat exchange tube assembly and the housing.

[0007] Because a portion of the heat exchanger tube assembly extends from the first wall to the outside of the housing, ports such as the inlet and outlet of the heat exchanger tube assembly can be located outside the housing. This also allows connecting structures such as adapters and flanges that need to connect to these ports to be located outside the housing, simplifying the fit between the heat exchanger tube assembly and the housing and facilitating connection, fixation, and disassembly of the heat exchanger tube assembly and external heat exchange structures during installation or maintenance. Furthermore, it reduces the space occupied by these connecting structures within the housing, which helps to reduce the size of the battery device, thus promoting miniaturization and weight reduction. With the overall housing size remaining unchanged, the saved space can be used to accommodate more battery components, thereby improving the space utilization of the housing and ultimately increasing the energy density of the battery device. Moreover, having the ports of the heat exchanger tube assembly located outside the housing helps reduce the number of internal interfaces, thus reducing the possibility of leakage of the heat exchanger tube assembly within the housing and improving the reliability of the battery device. At the edges, a seal is applied between the heat exchanger assembly and the housing, creating a sealed cavity within the housing. This simplifies the internal structure and protects internal components (such as battery modules) by providing waterproofing, dustproofing, and resistance to external forces. This provides a more stable internal environment, reducing the risk of damage from external factors and extending the battery's lifespan. Furthermore, it ensures the airtightness of the battery housing, improving the reliability and stability of the entire battery system.

[0008] In some embodiments, a portion of the first wall surface is recessed outward from the housing along a first direction to form a receiving portion, the first portion being located in the receiving portion, and the sealing element being sealed between the heat exchange tube assembly and the receiving portion, wherein the first direction is parallel to the thickness direction of the first wall.

[0009] By recessing a portion to accommodate the first part of the heat exchange tube assembly, the space occupied inside the housing for housing the battery assembly can be reduced. Specifically, a portion of the first wall surface is recessed outward along a first direction to form the accommodating portion, which reduces the space occupied by the heat exchange tube assembly in the first direction, thus improving the space utilization rate inside the housing. Moreover, since the heat exchange tube assembly is disposed within the accommodating portion, the accommodating portion can provide a certain degree of restraint for the heat exchange tube assembly, thereby reducing the possibility of damage to the heat exchange tube assembly due to external impacts or vibrations, and thus improving the reliability of the battery device.

[0010] In some embodiments, the projection of the first portion of the heat exchange tube assembly is within the projection range of the receiving portion in the same projection plane projected along the second direction, wherein the second direction is perpendicular to the first direction and intersects the extension direction of the receiving portion.

[0011] Therefore, the heat exchanger tube assembly housed within the housing does not extend beyond the housing section, allowing for more efficient use of the housing space. This further reduces the space occupied by the heat exchanger tube assembly in the first direction, resulting in a more compact and rational internal layout, thus improving the space utilization rate of the housing. Furthermore, since the heat exchanger tube assembly does not extend beyond the housing section, the first wall can form a relatively flat surface. When the battery assembly is supported by the first wall, this improves the stability of the battery assembly, thereby enhancing the reliability of the battery device.

[0012] In some embodiments, the battery device includes a second wall connected to the edge of the first wall, the plane of which extends from the first wall intersects the plane of which extends from the second wall; the seal surrounds the periphery of the heat exchange tube assembly and is sealingly connected between the heat exchange tube assembly and the second wall.

[0013] Therefore, the sealing element is sealed between the first wall and the heat exchange tube assembly, and the sealing element is sealed between the second wall and the heat exchange tube assembly, thereby achieving sealing between the heat exchange tube assembly and the housing wall in multiple directions. This further improves the sealing performance between the heat exchange tube assembly and the housing, helps to meet the airtightness requirements of the battery device, and improves the reliability and stability of the battery device.

[0014] In some embodiments, the first wall includes a receiving portion and a main body portion connected to the receiving portion, the sealing member being flush with the main body portion.

[0015] The seal is flush with the main body, which allows the first wall to form a flat surface after assembly with the heat exchange tube assembly, making it easier to assemble with the battery assembly.

[0016] In some embodiments, the seal includes a molded structure, which comprises a thermoplastic elastomer or a polypropylene polymer.

[0017] Molded structural components can be formed through a molding process, allowing their shape to closely match the shape of the gap between the heat exchanger tube assembly and the housing. Sealing components, including such molded structural components, contribute to better sealing performance. Furthermore, the molding process has a short molding cycle, simple molding method, and high dimensional accuracy, which helps reduce manufacturing costs while meeting the airtightness requirements of the housing.

[0018] In some embodiments, the molded structural member and the first wall are integral structural members; and / or, the first wall comprises a fiber-reinforced thermosetting composite or a fiber-reinforced thermoplastic composite.

[0019] The molded structural component is integrated with the first wall, resulting in greater overall integrity. Unlike assembled structural components, there are less likely to be assembly gaps between the parts, which helps to further improve the sealing effect of the casing and make the battery device more reliable.

[0020] In some embodiments, the sealant includes foam, hot melt adhesive, silicone, or plastic.

[0021] Foam, hot melt adhesive, silicone, and plastic are relatively inexpensive and lightweight. Using foam, hot melt adhesive, silicone, or plastic as a sealant helps reduce the manufacturing cost and weight of the battery device while ensuring sealing performance.

[0022] In some embodiments, the housing includes a top plate, a bottom plate, and a plurality of side plates, the plurality of side plates being connected between the top plate and the bottom plate, the top plate, the bottom plate, and the plurality of side plates forming a receiving cavity, the battery assembly being located in the receiving cavity and supported on the bottom plate; wherein, the first wall is configured as the bottom plate, and the second wall is configured as the side plate.

[0023] The heat exchange tube assembly is placed on the bottom plate, which can better exchange heat with the battery pack without taking up too much internal space of the box. The sealing element is sealed between the heat exchange tube assembly and the bottom plate, and also seals between the heat exchange tube assembly and the side plate, which helps to form a sealed housing cavity in the box and improves the reliability of the battery device.

[0024] In some embodiments, the battery device further includes a current collector located outside the housing; the heat exchange tube assembly includes a plurality of heat exchange tubes, the current collector is connected to at least two of the plurality of heat exchange tubes and the cavities of at least two of the heat exchange tubes are in communication.

[0025] The heat exchanger tube assembly is connected to the current collector outside the housing, which reduces the space occupied by the current collector inside the housing. The saved space can be used to install more battery modules or other functional components, thereby improving the space utilization of the housing and thus helping to increase the energy density of the battery device. Furthermore, it helps to reduce the number of interfaces inside the housing, facilitating the integration and weight reduction of the housing, and also reduces the possibility of heat exchange medium leakage from the interfaces within the heat exchanger tube assembly, thereby improving the reliability of the battery device.

[0026] A second aspect of this application provides an energy storage device, the energy storage device comprising a battery device for storing electrical energy or providing electrical energy as described in any one of the first aspects.

[0027] Since the energy storage device includes the battery device provided by the first aspect of the present application, which has good sealing performance, high energy density and good reliability, it is beneficial to extend the power supply time of the battery device to the energy storage device, and the risk of the energy storage device failing due to battery device failure is reduced, reducing the time spent on maintenance, and has good reliability and stability.

[0028] A third aspect of this application provides an energy storage system, including an energy storage converter and an energy storage device as described in the second aspect, wherein the energy storage converter is used to electrically connect a power generation device and the energy storage device.

[0029] Because the risk of failure due to battery device malfunction is reduced, the maintenance time is reduced, and the reliability and stability are good. Therefore, the energy storage system of this application has good reliability and stability.

[0030] A fourth aspect of this application provides a charging network including a charging pile and an energy storage device as described in the second aspect or an energy storage system as described in the third aspect, the energy storage device or the energy storage system being used to provide electrical energy to the charging pile.

[0031] Because the risk of failure due to battery device malfunction is reduced, the maintenance time is reduced, and the reliability and stability are good, the charging network of this application has good reliability and stability.

[0032] The battery device of this application has a simple and compact structure, good sealing performance, high energy density, and good reliability. Attached Figure Description

[0033] 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:

[0034] Figure 1 This is a schematic diagram of the charging network structure in some embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the energy storage system in some embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of the energy storage device in some embodiments of this application;

[0037] Figure 4This is a schematic diagram of the structure of the box in some embodiments of this application;

[0038] Figure 5 This is an exploded structural diagram of the first wall and heat exchange tube assembly in some embodiments of this application;

[0039] Figure 6 This is a schematic diagram of the structure of the first wall in some embodiments of this application;

[0040] Figure 7 This is a schematic diagram of the structure of the first wall and heat exchange tube assembly in some embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the structure of the molded first wall and heat exchange tube assembly in some embodiments of this application;

[0042] Figure 9 This is a block diagram illustrating the assembly method of a battery device in some embodiments of this application.

[0043] The reference numerals in the detailed embodiments are as follows:

[0044] 1000, Charging network; 2000, Energy storage system; 3000, Power generation device; 100, Battery device; 101, Housing; 111, First wall; 1110, First edge; 112, Second wall; 113, Receiving part; 114, Third wall; 115, Main body; 20, Heat exchanger tube assembly; 21, First part; 22, Second part; 200, Energy storage device; 210, Energy storage housing; 30, Sealing element; 31, First molded part; 32, Second molded part; 300, Charging pile; 40, Current collector; 41, First current collector; 42, Second current collector; 400, Energy storage converter; x, First direction; y, Second direction; z, Third direction. Detailed Implementation

[0045] 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.

[0046] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" 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.

[0048] 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.

[0049] 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 are in an "or" relationship.

[0050] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "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, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0053] The following is a detailed description of this application.

[0054] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively 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 the application areas of power batteries, the market demand is also constantly increasing.

[0055] During charge-discharge cycles, some of the chemical energy in a battery cell is converted into heat, which can affect the overall performance of the battery device. In cold conditions, excessively low temperatures can also negatively impact the battery's power delivery. Therefore, heat exchange components, such as heat exchanger tubes, are typically installed inside the battery casing to maintain the battery's temperature within its normal operating range.

[0056] In related technologies, the heat exchange tube assembly of the battery device is entirely located inside the housing; that is, the inlet and outlet ports of the heat exchange tube assembly are also located inside the housing. Therefore, it is necessary to connect to the ports of the heat exchange tube assembly via adapter pipes or connectors. The installation of these adapter pipes and connectors occupies internal space of the battery device and poses a risk of leakage.

[0057] In view of the above, a first aspect of this application provides a battery device, comprising: a housing, a battery assembly, a heat exchange tube assembly, and a sealing element. The housing includes a first wall; the battery assembly is disposed within the housing; the heat exchange tube assembly is used for heat exchange with the battery assembly, the heat exchange tube assembly including a first portion and a second portion whose cavities are interconnected, the first portion being housed within the housing, and the second portion being disposed outside the housing, the first portion and the second portion being integral; the sealing element is disposed on the first wall, and the sealing element is sealingly connected between the heat exchange tube assembly and the housing.

[0058] Because a portion of the heat exchanger tube assembly extends from the first wall to the outside of the housing, ports such as the inlet and outlet of the heat exchanger tube assembly can be located outside the housing. This also allows connecting structures such as adapters and flanges that need to connect to these ports to be located outside the housing, simplifying the fit between the heat exchanger tube assembly and the housing and facilitating connection, fixation, and disassembly of the heat exchanger tube assembly and external heat exchange structures during installation or maintenance. Furthermore, it reduces the space occupied by these connecting structures within the housing, which helps to reduce the size of the battery device, thus promoting miniaturization and weight reduction. With the overall housing size remaining unchanged, the saved space can be used to accommodate more battery components, thereby improving the space utilization of the housing and ultimately increasing the energy density of the battery device. Moreover, having the ports of the heat exchanger tube assembly located outside the housing helps reduce the number of internal interfaces, thus reducing the possibility of leakage of the heat exchanger tube assembly within the housing and improving the reliability of the battery device. At the edges, a seal is applied between the heat exchanger assembly and the housing, creating a sealed cavity within the housing. This simplifies the internal structure and protects internal components (such as battery modules) by providing waterproofing, dustproofing, and resistance to external forces. This provides a more stable internal environment, reducing the risk of damage from external factors and extending the battery's lifespan. Furthermore, it ensures the airtightness of the battery housing, improving the reliability and stability of the entire battery system.

[0059] The battery device disclosed in this application can be applied to energy storage devices such as energy storage containers or energy storage cabinets.

[0060] Please refer to Figure 1 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of this application. Figure 3 This is a schematic diagram of the structure of an energy storage device 200 provided in some embodiments of this application. Embodiments of this application provide a charging network 1000, which includes a charging pile 300 for charging electrical equipment. The charging network 1000 may also include an energy storage device 200, which is electrically connected to the charging pile 300 and provides power to the charging pile 300.

[0061] It should be noted that the charging pile 300 and the battery cells in the energy storage device 200 are electrically connected via cables, and the battery cells can supply their stored electrical energy to the charging pile 300. The charging pile 300 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's power. The application of the energy storage device 200 in this charging network 1000 can effectively improve the safety of the charging network 1000 and also help to enhance the flexibility of the charging network 1000 during deployment.

[0062] In a charging network 1000, there can be one charging pile 300, and the energy storage device 200 provides power to the one charging pile 300; there can also be multiple charging piles 300, and the energy storage device 200 provides power to multiple charging piles 300.

[0063] As an example, such as Figure 1 As shown, the charging network 1000 includes an energy storage device 200 and two charging piles 300, with the energy storage device 200 providing power to the two charging piles 300.

[0064] The energy storage device 200 may include a battery device 100, which is electrically connected to the charging pile 300 so that the battery device 100 can provide power to the charging pile 300.

[0065] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of an energy storage system 2000 provided in some embodiments of this application. Embodiments of this application provide an energy storage system 2000. The energy storage system 2000 includes an energy storage converter 400, which is electrically connected to a generator 3000 to convert the electrical power provided by the generator 3000. The energy storage system 2000 may also include an energy storage device 200, which is electrically connected to the energy storage converter 400. The energy storage converter 400 converts the electrical energy provided by the generator 3000 and stores it in the energy storage device 200.

[0066] A power conversion device is used to connect the power generation device 3000 and the energy storage device 200. The power generation device 3000 generates electrical energy and stores it in the energy storage device 200 via the power conversion device. The use of the energy storage device 200 in the energy storage system 2000 effectively improves its operational safety. In specific implementations, the power generation equipment can be solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of power generation equipment.

[0067] As an example, such as Figure 2As shown, the energy storage system 2000 includes an energy storage device 200 and an energy storage converter 400. The two power generation devices 3000 respectively transmit the generated electrical energy to the energy storage converter 400, and the energy storage converter 400 introduces the electrical energy into the energy storage device 200 for storage.

[0068] Please refer to Figure 3 The energy storage device 200 includes an energy storage box 210, and a battery device 100 is installed inside the energy storage box 210.

[0069] As an example, the energy storage device 200 can be an energy storage container, an energy storage cabinet, etc.

[0070] As an example, energy storage device 200 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 power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 200. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 200, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power supply.

[0071] In some embodiments of this application, for ease of explanation, a first direction, a second direction, and a third direction are defined, which are perpendicular to each other. However, those skilled in the art should understand that the embodiments of this application are not limited to the case where these three directions are perpendicular to each other. For ease of explanation, as... Figures 4 to 8 As shown by the arrows in the diagram, the direction of arrow x is the first direction, the direction of arrow y is the second direction, and the direction of arrow z is the third direction.

[0072] Below, refer to Figures 4 to 8 Some embodiments of this application will be described in detail.

[0073] Figure 4 This is a schematic diagram of the structure of the box in some embodiments of this application; Figure 5 This is an exploded structural diagram of the first wall and heat exchange tube assembly in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the first wall in some embodiments of this application; Figure 7 This is a schematic diagram of the structure of the first wall and heat exchange tube assembly in some embodiments of this application; Figure 8 This is a schematic diagram of the structure of the first wall and heat exchange tube assembly after molding in some embodiments of this application.

[0074] This application provides a battery device 100, which includes: a housing 101, a battery assembly, a heat exchange tube assembly 20, and a sealing element 30. The housing 101 includes a first wall 111; at least one battery assembly is disposed within the housing 101; the heat exchange tube assembly 20 is used for heat exchange with the battery assembly, and the heat exchange tube assembly 20 includes a first portion 21 and a second portion 22 whose cavities are interconnected, the first portion 21 being housed within the housing 101, and the second portion 22 being disposed outside the housing 101; the sealing element 30 is disposed on the first wall 111, and the sealing element 30 is sealingly connected between the heat exchange tube assembly 20 and the housing 101.

[0075] It should be noted that in this application, the first part 21 and the second part 22 of the heat exchange tube assembly 20 are not limited to being two separate components, and the lumen of the first part 21 and the lumen of the second part 22 are connected. In some embodiments, the lumen of the first part 21 and the second part 22 may be integral, and the heat exchange tube assembly 20 extends beyond the housing 101 at the edge of the first wall 111, with the portion located on the first wall constituting the first part 21 and the portion extending outside the housing 101 constituting the second part 22.

[0076] The battery apparatus 100 mentioned in the embodiments of this application may include one or more battery assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which may be connected in series, parallel, or mixed connections via busbars.

[0077] In some embodiments, the battery assembly is typically formed by arranging multiple battery cells.

[0078] As an example, a battery assembly can be a battery module, which consists of multiple individual battery cells arranged and fixed together to form a single module. Alternatively, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0079] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 101 and one or more battery components housed within the housing 101.

[0080] As an example, the battery assembly can be a battery module, which can be housed in the housing 101 by fixing the battery module in the housing 101.

[0081] As an example, the battery assembly can also be housed in the housing 101 by directly fixing multiple battery cells to the housing 101.

[0082] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0083] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0084] The heat exchange tube assembly 20 of this application can refer to an assembly used for heat exchange of the battery components within the battery device 100. The heat exchange tube assembly 20 can have a cavity for containing the heat exchange medium. For example, the battery components can be heated by introducing a high-temperature medium into the cavity of the heat exchange tube assembly 20, or a cooling medium can be introduced into the cavity of the heat exchange tube assembly 20 to accelerate the heat dissipation of the battery components, thereby enabling the battery components within the battery device 100 to always operate within a normal temperature range, improving the performance and service life of the battery device 100.

[0085] In this application, as Figure 1 As shown, the box 101 can be a cuboid structure composed of multiple walls. For example, the box 101 may include a first wall 111. However, this application is not limited to this; the box can also be other structures with regular or irregular shapes, or have other walls.

[0086] For example, multiple walls can be formed into a single structure.

[0087] As another example, multiple walls can be separate structures that are then assembled together by welding, bonding, snap-fitting, or other methods.

[0088] In this application, the first portion 21 of the heat exchange tube assembly 20 may be disposed on the first wall 111. Those skilled in the art will understand that in this application, any wall of the housing 101 on which the heat exchange tube assembly 20 is disposed may be referred to as the first wall. Exemplarily, the number of first walls 111 may be one, or there may be multiple first walls 111.

[0089] In this application, the heat exchange tube assembly 20 can be used to exchange heat with the battery assembly. The heat exchange medium can flow into the cavity of the heat exchange tube assembly 20, and after the heat exchange tube assembly 20 exchanges heat with the battery assembly, the heat exchange medium flows out from the cavity of the heat exchange tube assembly 20.

[0090] like Figures 5 to 8 As shown, the heat exchange tube assembly 20 may include a first part 21 and a second part 22 that are interconnected by tube cavities. The first part 21 is housed in the housing 101. The heat exchange tube assembly 20 extends beyond the housing 101 at the edge of the first wall 111, and the part extending out of the housing 101 constitutes the second part 22.

[0091] In this application, the heat exchange tube assembly 20 may have one or more liquid inlets and one or more liquid outlets. The heat exchange medium enters the cavity of the heat exchange tube assembly 20 from the liquid inlet and flows out of the cavity of the heat exchange tube assembly 20 from the liquid outlet.

[0092] In some embodiments, the liquid inlet may be located in the first portion 21, which in such embodiments may be located inside the housing 101. A portion of the pipes of the heat exchange tube assembly 20 may extend outside the first wall 111 and to the outside of the housing 101; this portion of the pipes is the second portion 22.

[0093] In some embodiments, the liquid inlet can be located in the second part 22. In such embodiments, the liquid inlet can be located outside the housing 101. In this application, the liquid inlet is located outside the housing 101 and is connected to the transmission pipe for conveying the heat exchange medium outside the housing 101. This eliminates the need to occupy the space of the internal accommodating cavity of the housing 101 to set up the adapter pipe or adapter for connecting to the liquid inlet. This reduces the space occupied in the internal accommodating cavity of the housing 101. The saved space can be used to install more battery components or other functional components, thereby improving the utilization rate of the internal space of the housing and increasing the energy density. Moreover, it is also beneficial to reduce the number of interfaces inside the housing, which is conducive to the integration and weight reduction of the housing. It can also reduce the possibility of leakage of the heat exchange medium in the heat exchange tube assembly from the interface, thereby improving the reliability of the battery device.

[0094] In some embodiments, the outlet may be located in the first part 21, and in such embodiments, the outlet may be located inside the housing 101.

[0095] In some embodiments, the liquid outlet may be located in the second part 22. In such embodiments, the liquid outlet may be located outside the housing 101. In this application, the liquid outlet is located outside the housing 101 and is connected to the transmission pipe for conveying the heat exchange medium outside the housing 101. In this way, it is not necessary to occupy the internal cavity of the housing 101 to set up the adapter pipe or adapter interface connected to the liquid outlet. This reduces the space occupied in the internal cavity of the housing 101. The saved space can be used to set up more battery components or other functional components, thereby improving the utilization rate of the internal space of the housing and increasing the energy density.

[0096] In some embodiments, both the liquid inlet and the liquid outlet can be located in the second part 22, that is, both the liquid inlet and the liquid outlet can be located outside the housing 101, which helps to further reduce the space occupied inside the housing, facilitates the integration and weight reduction of the battery device, and helps to further reduce the possibility of leakage of the heat exchange tube assembly inside the housing, thereby further improving the reliability of the battery device.

[0097] In some embodiments, the number of second portions 22 of the heat exchange tube assembly 20 can be multiple. Multiple second portions 22 can extend from the same edge of the first wall 111, or they can extend from different edges of the first wall 111 respectively; this application does not impose specific limitations. In specific embodiments, the configuration can be tailored to the specific application scenario, shape, structure, and location of the battery device 100.

[0098] In this application, since a portion of the heat exchange tube assembly 20 extends from the first wall 111 to the outside of the housing 101, for example, the inlet and outlet ports of the heat exchange tube assembly 20 can be located outside the housing 101. Consequently, connecting structures such as adapters or flanges that need to connect to these ports are also located outside the housing 101. This simplifies the fit between the heat exchange tube assembly 20 and the housing 101, making it easier to connect, fix, or disassemble the heat exchange tube assembly 20 with the external heat exchange structure during installation or maintenance. Furthermore, it reduces the space occupied by these connecting structures within the housing, which helps to reduce the size of the battery device 100, thus contributing to its miniaturization and weight reduction. With the overall size of the housing 101 remaining unchanged, the saved space can be used to install more battery components, thereby improving the space utilization of the housing 101 and ultimately increasing the energy density of the battery device 100.

[0099] Since part of the heat exchange tube assembly 20 extends beyond the housing 101, there may be gaps between the heat exchange tube assembly 20 and the housing 101, which may affect the sealing performance of the housing 101 and the requirements for airtightness.

[0100] Therefore, in this application, the battery device 100 may also include a seal 30, which can be sealed between the heat exchange tube assembly 20 and the housing 101 at the edge.

[0101] In this application, the number and position of the sealing elements 30 can correspond to the number and position of the second part 22, but this application is not limited to this. In some embodiments, the number and position of the sealing elements 30 may not correspond to the number of the second part 22, as long as the sealing performance of the internal cavity of the housing 101 can meet the requirements of the battery device 100.

[0102] The battery assembly can be disposed on the first wall 111, for example, it can be connected to the first wall 111. The battery assembly is located in the receiving cavity, that is, the battery assembly can be supported on the wall surface of the first wall 111 facing the interior of the housing 101. The first wall 111 acts as the bottom wall of the housing, and the bottom of the battery assembly contacts the heat exchange tube assembly 20. Of course, this application is not limited to this. In some embodiments, the first wall 111 can also act as the side wall of the housing 101, that is, the side of the battery assembly contacts the heat exchange tube assembly. Of course, in some embodiments, the first wall 111 can also act as both the bottom wall and the side wall of the housing. In this application, the wall surface of the first wall 111 located inside the housing 101 can be provided with a receiving portion for accommodating the heat exchange tube assembly 20, that is, at least a portion of the heat exchange tube assembly 20 can be disposed in the receiving portion. In some embodiments, the receiving portion can be formed by forming a protruding or recessed structure on the first wall 111, or by providing additional structural members on the first wall 111 to form the receiving portion. This application does not make any specific limitations.

[0103] In this application, as Figures 5 to 8 As shown, a portion of the wall surface of the first wall 111 is recessed outward from the box along the first direction x to form a receiving portion 113. The first portion 21 is located in the receiving portion 113. The sealing member 30 is sealed between the heat exchange tube assembly 20 and the receiving portion 113. The first direction x can be parallel to the thickness direction of the first wall 111.

[0104] like Figures 5 to 8 As shown, the first wall 111 can extend in a plane formed by the second direction y and the third direction z. The first direction x is perpendicular to the second direction y and the third direction z. A portion of the wall surface of the first wall 111 is recessed along the third direction z to form a receiving portion 113.

[0105] By recessing the first portion 21 of the heat exchange tube assembly 20, the space occupied inside the housing 101 for housing the battery assembly can be reduced. Specifically, a portion of the first wall 111 is recessed along the first direction x to form the receiving portion 113, which reduces the space occupied by the heat exchange tube assembly 20 in the first direction, thus improving the space utilization of the housing. Moreover, since the heat exchange tube assembly 20 is disposed within the receiving portion 113, it can play a certain limiting role, thereby reducing the possibility of damage to the heat exchange tube assembly 20 due to external impacts or vibrations, thereby improving the reliability of the battery device 100.

[0106] In this application, the first wall having the receiving portion can be manufactured by injection molding or compression molding. In some embodiments, a mold can be made according to the shape of the receiving portion, and then the first wall having the receiving portion can be formed by injection molding using the mold. In some embodiments, a molding compound can be used to form the first wall having the receiving portion by compression molding.

[0107] In this application, the molded part can be a fiber-reinforced thermosetting composite material or a fiber-reinforced thermoplastic composite material. A molding process is used to mold the fiber-reinforced thermosetting composite material or the fiber-reinforced thermoplastic composite material to form the first wall.

[0108] It should be noted that, in this application, the manufacturing process and materials of the first wall are not limited to the processes and materials listed in the above embodiments, but include any process and materials suitable for the housing of the battery device.

[0109] In some embodiments, the projection of the first portion 21 of the heat exchange tube assembly 20 is within the projection range of the receiving portion 113 in the same projection plane along the second direction y, where the second direction y is perpendicular to the first direction x and intersects the extension direction of the receiving portion 113.

[0110] like Figures 5 to 8 As shown, the extending plane of the first wall 111 is parallel to the plane formed by the second direction y and the third direction z, and the receiving portion 113 is recessed along the first direction x. The so-called same projection plane refers to a plane perpendicular to the plane formed by the second direction y and the third direction z, in which the projection of the heat exchange tube assembly 20 is within the projection range of the receiving portion 113. Specifically, along the first direction x, the heat exchange tube assembly 20 housed within the casing does not extend beyond the receiving portion 113.

[0111] Therefore, the space of the housing 113 can be utilized more effectively to accommodate the heat exchange tube assembly 20, further reducing the space occupied by the heat exchange tube assembly 20 in the first direction x of the housing 101. This makes the internal layout of the housing 101 more compact and reasonable, thereby further improving the space utilization rate of the housing 101. Moreover, the heat exchange tube assembly 20 housed in the housing does not exceed the housing portion, and the entire first wall 111 can form a relatively flat surface. When the battery assembly is supported on the first wall 111, it helps to improve the stability of the battery assembly placement, thereby further improving the reliability of the battery device 100.

[0112] In this application, the first part 21 of the heat exchange tube assembly 20 housed in the housing does not extend beyond the housing portion, which is beneficial for the overall formation of a relatively flat surface of the first wall 111.

[0113] In some embodiments, the first wall 111 may include a receiving portion 113 and a main body portion 115 connected to the receiving portion 113. The main body portion 115 may be a portion of the first wall 111 that does not form the receiving portion 113. For example, in an embodiment where the receiving portion 113 is formed by a recess in a portion of the wall surface of the first wall 111, the remaining wall surface of the first wall 111 may be configured as the main body portion 115.

[0114] The fact that the heat exchanger tube assembly 20 is not set beyond the receiving portion 113 can mean that, along the first direction x, the heat exchanger tube assembly 20 is set below the main body portion 115. Alternatively, it can mean that, along the first direction x, the heat exchanger tube assembly 20 is set flush with the main body portion 115.

[0115] In some embodiments, the battery device 100 may include a heat-conducting element disposed between the first wall 111 and the battery assembly to facilitate better heat exchange between the heat exchange tube assembly 20 and the battery assembly. In this application, since the heat exchange tube assembly 20 is flush with the main body 115, the amount of heat-conducting element such as thermally conductive adhesive can also be reduced.

[0116] In some embodiments, such as Figures 5 to 8 As shown, the heat exchanger tube assembly 20 includes at least one bent section, and the shape of the receiving portion 113 is adapted to the shape of the heat exchanger tube assembly 20. In some embodiments, the heat exchanger tube assembly 20 may include multiple bent sections, and the bending angles and bending shapes of the multiple bent sections may be the same or different, which is not specifically limited in this application.

[0117] In this application, the shape of the receiving portion 113 can be adapted to the shape of the heat exchange tube assembly 20. That is, the receiving portion 113 can also include at least one bent section, the shape of which can be adapted to the shape of the bent section of the heat exchange tube assembly 20.

[0118] The heat exchange tube assembly 20 has a bend, which helps to extend the flow path of the internal heat exchange medium, allowing the heat exchange medium to flow through more parts of the battery assembly via the bend, thereby increasing the heat exchange area of ​​the heat exchange tube assembly 20 and improving the heat exchange efficiency.

[0119] As a specific example, the heat exchanger tube assembly 20 can be a serpentine tube.

[0120] In some embodiments, the seal 30 includes a molded structure, which includes a thermoplastic elastomer or a polypropylene polymer.

[0121] In this application, the sealing element 30 may be composed of a molded structural element formed by molding a molded part. Specifically, the material of the molded part may include thermoplastic elastomer or polypropylene polymer material. After the molded part is processed and shaped by the molding process, a thermoplastic elastomer or polypropylene polymer body can be formed as a molded structural element.

[0122] In some embodiments, the seal 30 may also be injection molded from an injection molded part.

[0123] In this application, the first wall 111, the heat exchange tube assembly 20, and the seals can be assembled. For example... Figure 6 The diagram shows the structure of the first wall 111. The first wall 111 has a first edge 1110. At the first edge 1110, a first molded part 31 is placed in the receiving part 113. The first edge 1110 can be any edge of the first wall 111. As long as the heat exchange tube assembly 20 extends from this edge, it can be called the first edge.

[0124] like Figure 7 As shown, after the first molding part 31 is placed in the receiving part 113, the heat exchange tube assembly 20 is placed in the receiving part 113. At this time, the first molding part 31 is located on one side of the heat exchange tube assembly 20, or it can be considered that the first molding part 31 is located on the lower side of the heat exchange tube assembly 20. The first molding part 31 can be referred to as the lower molding part.

[0125] In this application, the material of the first molded part 31 may be selected from one or more of thermoplastic elastomer (TPE / TPU) and polypropylene homopolymer / polymer (PP-H / PP-R).

[0126] like Figure 7 As shown, after the first molded part 31 is placed in the receiving part 113, the second molded part 32 is placed on the opposite side of the heat exchange tube assembly 20 along the first direction x at the first edge 1110. At this time, the second molded part 32 is located on the other side of the heat exchange tube assembly 20, or it can be considered that the second molded part 32 is located on the upper side of the heat exchange tube assembly 20. The second molded part 32 can be referred to as the upper molded part.

[0127] In this application, the material of the second molded part 32 may be selected from one or more of thermoplastic elastomer (TPE / TPU) and polypropylene homopolymer / polymer (PP-H / PP-R).

[0128] For example Figure 7The structure formed by combining the first wall 111, the first molded part 31, and the second molded part 32 shown is manufactured using a molding process to produce the structure as shown. Figure 8 The seal 30 shown is surrounding the heat exchange tube assembly 20.

[0129] Molded structural components can be formed through a molding process, allowing their shape to closely match the shape of the gap between the heat exchanger tube assembly 20 and the housing 101. The sealing component 30 includes such a molded structural component, which facilitates a better sealing effect. Furthermore, the molding process has a short molding cycle, simple molding method, and high dimensional accuracy, which helps to reduce manufacturing costs while meeting the airtightness requirements of the housing 101.

[0130] The embodiments of this application do not specifically limit the number of molded parts. In some embodiments, there may be only one molded part or more molded parts.

[0131] In some embodiments, the molded structural member and the first wall 111 are formed by a molding process as follows: Figure 8 The integral structural component shown; and / or, the first wall 111 may include a fiber-reinforced thermosetting composite or a fiber-reinforced thermoplastic composite.

[0132] In this application, fiber-reinforced thermosetting composites may include materials in which ceramic materials such as glass fiber, carbon fiber, and boron fiber are used as reinforcing agents and combined with matrix materials such as plastics, resins, rubbers, and metals.

[0133] In this application, fiber-reinforced thermoplastic composites may include materials in which fiber materials such as glass fiber, carbon fiber, and aramid fiber are used as reinforcing agents and combined with matrix materials such as various thermoplastic resins.

[0134] In such Figure 8 In the integrated structural component shown, the first molded structural component formed by molding the first molded component 31 and the second molded structural component formed by molding the second molded component 32 together form the sealing component 30. The sealing component 30 and the first wall 111 are formed into an integrated structural component during the molding process, and the upper surface of the sealing component 30 constitutes part of the wall surface of the main body of the first wall 111.

[0135] The molded structural component and the first wall 111 are integrated into one structural component, which has a higher integrity and is less likely to have assembly gaps between the parts, which is conducive to further improving the sealing effect of the box and making the battery device more reliable.

[0136] In some embodiments, the seal 30 includes foam, hot melt adhesive, silicone, or plastic. For example, in some embodiments, the seal may include expanded polypropylene (EPP) foam.

[0137] In some embodiments, the housing can also be sealed by wrapping foam, filling with hot melt adhesive, silicone, or other methods between the heat exchanger tube assembly 20 and the housing.

[0138] Foam, hot melt adhesive, silicone, and plastic are relatively inexpensive and lightweight. Using one or more of these materials as sealant 30 helps reduce the manufacturing cost and weight of the battery device 100 while ensuring sealing performance. Figure 1 As shown, in some embodiments, the housing 101 may include a first wall 111, a second wall 112, and a third wall 114. The first wall 111 and the third wall 114 are disposed opposite each other along a first direction x. The second wall 112 is disposed between the first wall 111 and the third wall 114 and is in contact with both the first wall 111 and the third wall 114. The first wall 111, the second wall 112, and the third wall 114 are interconnected to form a receiving cavity, in which the battery assembly can be disposed.

[0139] The second wall 112 may be connected to the first wall 111 at its edge, and both the first wall 111 and the second wall 112 are connected to the heat exchange tube assembly 20. For example, the side of the second wall 112 connected to the first wall 111 has an opening adapted to the shape of the heat exchange tube assembly 20, from which the heat exchange tube assembly 20 can extend to the outside of the housing 101. The seal 30 may be located between the first wall 111 and the heat exchange tube assembly 20, and between the second wall 112 and the heat exchange tube assembly 20.

[0140] In some embodiments of this application, the seal 30 seals the gap between the first portion 21 of the heat exchange tube assembly 20 and the first wall 111, and seals the gap between the first portion 21 of the heat exchange tube assembly 20 and the second wall 112.

[0141] In some embodiments of this application, the seal 30 may be disposed on the first wall 111 and not extend beyond the first wall 111.

[0142] In this application, the housing 101 may include a top plate, a bottom plate, and multiple side plates. The multiple side plates are connected between the top plate and the bottom plate. The top plate, the bottom plate, and the multiple side plates together form a receiving cavity, and the battery assembly is located in the receiving cavity and supported by the bottom plate. In this application, the first wall 111 may be configured as the bottom plate, the second wall 112 may be configured as a side plate, and the third wall 114 may be configured as the top plate.

[0143] The second wall 112 is connected to the edge of the first wall 111, and the plane extending from the first wall 111 intersects the plane extending from the second wall 112; the seal 30 surrounds the periphery of the heat exchange tube assembly 20 and is sealed between the heat exchange tube assembly 20 and the second wall 112.

[0144] In some embodiments, the second wall 112 is connected at the edge of the first wall 111, for example, the second wall 112 may be connected to the first wall 111 at the first edge 1110.

[0145] In this application, the heat exchange tube assembly 20 is placed on the bottom plate, which can better exchange heat with the battery assembly without occupying too much internal space of the housing 101. The sealing member 30 is sealed between the heat exchange tube assembly 20 and the bottom plate and between the heat exchange tube assembly 20 and the side plate, which helps to form a sealed receiving cavity of the housing 101 and improve the reliability of the battery device 100.

[0146] like Figure 5 and Figure 7 As shown, at the first edge 1110 of the first wall 111, the seal 30 can be sealed between the first wall 111, the heat exchange tube assembly 20 and the second wall 112 to form a sealed receiving cavity inside the housing 101.

[0147] In some embodiments, the seal 30 may be flush with the main body 115 of the first wall 111.

[0148] The seal 30 is flush with the main body 115, which facilitates the formation of a flat surface at the first edge 1110 of the first wall 111, making it easier to assemble the first wall 111 and the second wall 112. With a flat surface at the first edge 1110, the sealing effect between the first wall 111 and the second wall 112 is better, which helps to improve the reliability of the battery device 100.

[0149] In some embodiments, the second wall 112 is connected to the first wall 111 at its edge, and the plane extending from the first wall 111 intersects the plane extending from the second wall 112; the seal 30 surrounds the periphery of the heat exchange tube assembly 20 and the seal 30 is sealed between the heat exchange tube assembly 20 and the second wall 112.

[0150] The sealing element 30 is sealed between the first wall 111 and the heat exchange tube assembly 20, and also sealably connects the second wall 112 and the heat exchange tube assembly 20, facilitating the formation of a sealed receiving cavity inside the housing 101. This simplifies the internal structure of the housing 101 while protecting internal components (such as battery modules) from water, dust, and external forces, providing a more stable internal environment and reducing the risk of damage to these components from external environmental influences, thus extending the lifespan of the battery device 100. Furthermore, it ensures the airtightness of the housing 101 of the battery device 100, thereby improving the reliability and stability of the battery device 100.

[0151] In some embodiments, such as Figure 5 As shown, the battery device 100 also includes a current collector 40 located outside the housing 101. The heat exchange tube assembly 20 includes a plurality of heat exchange tubes, and the current collector 40 is connected to at least two of the plurality of heat exchange tubes and the lumens of the at least two heat exchange tubes are in communication.

[0152] In this application, the heat exchange tube assembly 20 may include multiple heat exchange tubes. Multiple heat exchange tubes are beneficial for increasing the effective heat exchange area in contact with the battery assembly, thereby increasing heat exchange efficiency. One end of the current collector 40 may be used to connect to a transmission pipe for transmitting the heat exchange medium, and the other end of the current collector 40 may be connected to at least two of the multiple heat exchange tubes, with the cavities of the at least two heat exchange tubes communicating. This allows the heat exchange medium within the at least two heat exchange tubes to be transmitted, improving heat exchange efficiency.

[0153] like Figure 5 As shown, in some embodiments, the current collector 40 may include a first current collector 41 and a second current collector 42.

[0154] In some embodiments, the first current collector 41 may be disposed at the liquid inlet of the heat exchange tube assembly 20, and the second current collector 42 may be disposed at the liquid outlet of the heat exchange tube assembly 20.

[0155] The heat exchange tube assembly 20 is connected to the current collector outside the housing 101, which reduces the space occupied by the current collector within the housing 101. The saved space can be used to install more battery components or other functional parts, thereby improving the space utilization of the housing 101 and thus increasing the energy density of the battery device 100. Furthermore, it helps reduce the number of interfaces inside the housing, facilitating integration and weight reduction of the housing, and also reduces the possibility of leakage of the heat exchange medium within the heat exchange tube assembly at the interfaces, thereby improving the reliability of the battery device.

[0156] This application provides a method for assembling a battery device. Figure 9 This is a block diagram illustrating the assembly method of the battery device in some embodiments of this application, such as... Figure 9 As shown, the assembly method of this application includes the following steps:

[0157] S11: Form the first wall with a receiving portion.

[0158] The first wall can be formed by injection molding or compression molding.

[0159] S12: Place the second molded part in the receiving part at the edge of the first wall;

[0160] S13: The heat exchange tube assembly is placed on the first wall, the first part of the heat exchange tube assembly is located in the receiving part, the edge part of the first part is placed on the second molded part, and the second part extends beyond the first wall.

[0161] S14: Place a first molded part on the heat exchange tube assembly. The first molded part, the first wall, and the second molded part constitute a combined structure.

[0162] The first molded part is positioned opposite the second molded part at its edge along a first direction.

[0163] S15: Mold the combined structure to form a seal around the heat exchanger tube assembly.

[0164] A second aspect of this application provides an energy storage device, which includes a battery device 100 for storing electrical energy or providing electrical energy according to any one of the first aspects.

[0165] Since the energy storage device includes the battery device 100 provided in the first aspect of the present application, it is advantageous to extend the power supply time of the battery device 100 to the power-consuming device, and the risk of the power-consuming device failing due to the failure of the battery device 100 is reduced, the time spent on maintenance is reduced, and the reliability and stability are good.

[0166] A third aspect of this application provides an energy storage system, including an energy storage converter and an energy storage device as described in the second aspect, wherein the energy storage converter is used to electrically connect a power generation device and an energy storage device.

[0167] Because the risk of failure due to battery device malfunction is reduced, the maintenance time is reduced, and the reliability and stability are good. Therefore, the energy storage system of this application has good reliability and stability.

[0168] A fourth aspect of this application provides a charging network including a charging pile and an energy storage device as described in the second aspect or an energy storage system as described in the third aspect, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0169] Because the risk of failure due to battery device malfunction is reduced, the maintenance time is reduced, and the reliability and stability are good, the charging network of this application has good reliability and stability.

[0170] The following describes specific examples of some embodiments of this application with reference to the accompanying drawings.

[0171] As a specific example, a battery device is provided, which includes a housing, a serpentine tube (heat exchange tube assembly 20), and a seal. The housing may include a base plate (first wall 111).

[0172] When assembling the base plate, serpentine tube, and seals, first insert the serpentine tube into the upper surface of the composite molded base plate (or injection molded base plate). The base plate is recessed in the area where the serpentine tube passes (receiving part). The upper surface of the serpentine tube is flush with or slightly lower than the upper surface of the base plate.

[0173] Before molding, place one or more lower molding sheets (first molding part 31) on the serpentine tube extension on the base plate, then place the serpentine tube on the base plate, and then place the upper molding sheet (second molding part 32) on the serpentine tube extension on the base plate.

[0174] In this application, the box body is formed by molding the base plate, lower mold plate, serpentine tube, and upper mold plate together. At the point where the serpentine tube extends from the base plate, there is no gap between the serpentine tube and the base plate, resulting in good airtightness of the box body.

[0175] In this application, the base plate material may be selected from: fiber-reinforced thermosetting composite material or fiber-reinforced thermoplastic composite material.

[0176] In this application, the materials for the upper and lower molds can be selected from thermoplastic elastomers (TPE / TPU), polypropylene homopolymers / copolymers (PP-H / PP-R), etc.

[0177] In this application, the sealing element may be polypropylene foam (EPP).

[0178] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. 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 all should be covered within the scope 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 this application.

Claims

1. A battery device, characterized in that, include: The enclosure includes a first wall; The battery assembly is housed within the casing; A heat exchange tube assembly is used to exchange heat with the battery assembly. The heat exchange tube assembly includes a first part and a second part whose cavities are interconnected. The first part is housed in the housing, and the second part is disposed outside the housing. The first part and the second part are integral. as well as A sealing element is disposed on the first wall, and the sealing element is sealingly connected between the heat exchange tube assembly and the housing.

2. The battery device according to claim 1, characterized in that, A portion of the first wall surface is recessed outward from the housing along a first direction to form a receiving portion, the first portion being located within the receiving portion, and the sealing element being sealed between the heat exchange tube assembly and the receiving portion, the first direction being parallel to the thickness direction of the first wall.

3. The battery device according to claim 2, characterized in that, In the same projection plane along the second direction, the projection of the first portion of the heat exchange tube assembly is within the projection range of the receiving portion, and the second direction is perpendicular to the first direction and intersects the extension direction of the receiving portion.

4. The battery device according to claim 1, characterized in that, The battery device includes a second wall connected to the edge of the first wall, and the plane extending from the first wall intersects the plane extending from the second wall. The seal surrounds the periphery of the heat exchange tube assembly and is sealingly connected between the heat exchange tube assembly and the second wall.

5. The battery device according to claim 4, characterized in that, The first wall includes a receiving portion and a main body portion connected to the receiving portion, and the sealing element is flush with the main body portion.

6. The battery device according to claim 4 or 5, characterized in that, The housing includes a top plate, a bottom plate, and multiple side plates. The multiple side plates are connected between the top plate and the bottom plate. The top plate, the bottom plate, and the multiple side plates together form a receiving cavity. The battery assembly is located in the receiving cavity and supported by the bottom plate. The first wall forms the bottom plate, and the second wall forms the side plate.

7. The battery device according to any one of claims 1 to 5, characterized in that, The sealing element includes a molded structural component, which comprises a thermoplastic elastomer or a polypropylene polymer.

8. The battery device according to claim 7, characterized in that, The molded structural component and the first wall are an integral structural component; And / or, the first wall comprises a fiber-reinforced thermosetting composite or a fiber-reinforced thermoplastic composite.

9. The battery device according to any one of claims 1 to 5, characterized in that, The sealing element includes foam, hot melt adhesive, silicone, or plastic.

10. The battery device according to any one of claims 1 to 5, characterized in that, The battery device also includes a current collector located outside the housing; The heat exchange tube assembly includes a plurality of heat exchange tubes, and the current collector is connected to at least two of the plurality of heat exchange tubes and the cavities of at least two of the heat exchange tubes are in communication.

11. An energy storage device, characterized in that, The energy storage device includes a battery device according to any one of claims 1 to 10 for storing or providing electrical energy.

12. An energy storage system, characterized in that, It includes an energy storage converter and an energy storage device as described in claim 11, wherein the energy storage converter is used to electrically connect the power generation device and the energy storage device.

13. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in claim 11 or an energy storage system as described in claim 12, wherein the energy storage device or the energy storage system is used to provide electrical energy to the charging pile.

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