Energy storage device, energy storage system and charging network

Abstract

The utility model is suitable for the technical field of energy storage, and provides an energy storage device, an energy storage system and a charging network, and the energy storage device comprises a cabinet which comprises a cabinet main body; the battery device is accommodated in the accommodating space; the heat exchange structure is contained in the containing space and comprises a first plate part; the heat exchange structure further comprises a second plate part and a third plate part. According to the energy storage device provided by the embodiment of the invention, the heat exchange structure is matched with the heat exchange mode of the cabinet body and the external environment to dissipate heat, so that the space occupied by the water cooling unit or the air cooling unit is saved, more battery devices can be conveniently mounted in the cabinet body, and the space utilization rate in the cabinet body is improved; and meanwhile, the heat is concentrated to the third plate part through the second plate part, so that the third plate part transmits the heat to the cabinet main body in a concentrated manner, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This application belongs to the technical field of energy storage, and particularly relates to an energy storage device, an energy storage system, and a charging network. Background Art

[0002] In current energy storage devices, a water-cooling unit or an air-cooling unit is usually arranged in a cabinet to cool the battery device in the cabinet. Since the cabinet usually has a fixed size specification, and the volume of the water-cooling unit or the air-cooling unit is usually large, the setting of the water-cooling unit or the air-cooling unit easily occupies the installation space of the battery device and results in a low capacity of the energy storage device. Summary of the Utility Model

[0003] In view of the above problems, this application provides an energy storage device, an energy storage system, and a charging network, which can reduce the occupation of the internal space of the cabinet by the temperature control structure.

[0004] In a first aspect, this application provides an energy storage device, including:

[0005] A cabinet, which includes a cabinet body with an accommodation space provided therein; a battery device accommodated in the accommodation space; a heat exchange structure accommodated in the accommodation space, the heat exchange structure including a first plate portion for carrying the battery device and performing heat exchange with the battery device; the heat exchange structure further includes a second plate portion and a third plate portion, one side of the second plate portion is connected to the first plate portion, the other side of the second plate portion is connected to the third plate portion, and the third plate portion is connected to the cabinet body to perform heat exchange with the cabinet body and enable the cabinet body to dissipate heat to the external environment.

[0006] In the technical solution of this embodiment, a heat exchange structure is provided, and the heat exchange structure includes a first plate portion to facilitate heat exchange with the battery device. At the same time, the heat exchange structure includes a second plate portion and a third plate portion to transfer the heat on the first plate portion to the third plate portion through the second plate portion and transfer the heat to the cabinet body through the third plate portion. In this setting, heat is dissipated by means of the heat exchange structure in cooperation with the heat exchange between the cabinet and the external environment, saving the space occupied by the water-cooling unit or the air-cooling unit, facilitating the installation of more battery devices in the cabinet, and improving the space utilization rate inside the cabinet. At the same time, the heat is concentrated at the third plate portion through the second plate portion, facilitating the concentrated transfer of heat from the third plate portion to the cabinet body and improving the heat dissipation efficiency.

[0007] In some embodiments, the first plate portion and the second plate portion are respectively located on different sides of the battery device, and the second plate portion can perform heat exchange with an adjacent battery device.

[0008] In the technical solution of this embodiment, enabling the second plate portion to also perform heat exchange with an adjacent battery device improves the heat exchange area and heat exchange efficiency between the heat exchange structure and the battery device.

[0009] In some embodiments, a flow channel is provided in the heat exchange structure, and a heat exchange medium is accommodated in the flow channel.

[0010] In the technical solution of this embodiment, a flow channel is provided in the heat exchange structure, and a heat exchange medium is provided in the flow channel to carry and transfer heat through the heat exchange medium, so as to better transfer the heat of the battery device to the cabinet body.

[0011] In some embodiments, the heat exchange medium is a phase change material.

[0012] In the technical solution of this embodiment, the heat exchange medium is a phase change material, so that the phase change material can carry heat and flow autonomously in the flow channel to better transfer the heat of the battery device to the cabinet; and this setting does not require a device for driving the heat exchange medium to flow in the heat exchange structure, thereby further reducing the space occupied by the heat exchange structure and improving the utilization rate of the internal space of the cabinet.

[0013] In some embodiments, the flow channel includes a first flow channel provided in the first plate portion, and one side of the first flow channel extends to one side of the second plate portion for the heat exchange medium to exchange heat with the second plate portion.

[0014] The technical solution of this embodiment provides a specific structure of some flow channels, enabling the heat exchange medium to exchange heat with the battery device in the first flow channel, and enabling the first flow channel to extend to one side of the second plate portion, so that the first plate portion can better exchange heat with the second plate portion.

[0015] In some embodiments, the flow channel further includes a second flow channel communicating with the first flow channel. The second flow channel is provided in the second plate portion, and one side of the second flow channel extends to one side of the third plate portion for the heat exchange medium to exchange heat with the third plate portion.

[0016] The technical solution of this embodiment provides a specific structure of some flow channels, provides a second flow channel communicating with the first flow channel, and enables one end of the second flow channel to extend to one side of the third plate portion, so that the heat exchange medium can directly flow along the second flow channel to near the third plate portion after exchanging heat with the battery device, so that the second plate portion can better play the role of transferring heat and can better exchange heat with the third plate portion.

[0017] In some embodiments, the flow channel further includes a third flow channel communicating with the second flow channel. The third flow channel is provided in the third plate portion for the heat exchange medium to exchange heat with the cabinet body.

[0018] The technical solution of this embodiment provides specific structures of some flow channels. A third flow channel communicated with the second flow channel is provided so that the heat exchange medium can directly enter the third plate part from the first plate part, facilitating the heat exchange between the heat exchange medium and the cabinet body. Thus, the heat of the battery device can be directly transferred to the cabinet body through the flowing heat exchange medium, further improving the heat exchange efficiency.

[0019] In some embodiments, the second flow channel is gradually expanded along the direction in which the heat exchange medium enters the second flow channel from the third flow channel and flows toward the first flow channel.

[0020] The technical solution of this embodiment provides specific structures of some flow channels. The second flow channel is gradually expanded along the direction away from the third flow channel. Since the heat exchange medium is likely to first enter the first flow channel closer to the third flow channel during the process of the heat exchange medium entering each first flow channel from the third flow channel through the second flow channel, it is likely to result in a smaller amount of the heat exchange medium in the first flow channel far from the third flow channel. Accordingly, the second flow channel is gradually expanded to control the amount of the heat exchange medium in each first flow channel, reduce the difference in the amount of the heat exchange medium in each first flow channel, and improve the heat exchange uniformity and consistency of the entire heat exchange structure.

[0021] In some embodiments, the extending direction of the first flow channel is parallel to the width direction of the battery device, and the second plate part is located on one side of the battery device along the width direction of the battery device.

[0022] The technical solution of this embodiment provides specific structures of some flow channels. The first flow channel extends along the width direction of the battery device to shorten the flow path of the heat exchange medium in the first flow channel, thereby improving the heat exchange uniformity and consistency between the first plate part and the battery device, and also improving the heat exchange efficiency between the first plate part and the battery device.

[0023] In some embodiments, the number of the second plate parts is at least two. At least two second plate parts are connected to different sides of the first plate part, and at least two second plate parts are connected to different sides of the third plate part.

[0024] In the technical solution of this embodiment, the number of the second plate parts is at least two to improve the heat transfer efficiency of each second plate part.

[0025] In some embodiments, the second plate part includes at least two heat-conducting sub-parts. Each heat-conducting sub-part is connected to the third plate part, and at least two heat-conducting sub-parts are respectively connected to different first plate parts.

[0026] The technical solution of this embodiment provides specific structures of some second plate parts. Heat-conducting sub-parts are provided so that different third plate parts can transfer heat to the third plate part through different heat-conducting sub-parts, improving the heat transfer efficiency and also reducing the temperature difference between different first plate parts.

[0027] In some embodiments, the heat exchange structure is a heat conducting structural member.

[0028] In the technical solution of this embodiment, the heat exchange structure is a heat conducting structural member, so that the heat exchange structure can transfer the heat on the battery device to the cabinet body better and more efficiently.

[0029] In some embodiments, the cabinet body further includes a heat dissipation structure provided on the outer surface of the cabinet body main body, and the heat dissipation structure corresponds to the third plate portion.

[0030] In the technical solution of this embodiment, a heat dissipation structure is provided to increase the heat exchange area between the cabinet body main body and the external environment, thereby improving the heat exchange efficiency between the cabinet body main body and the external environment; the heat dissipation structure corresponds to the third plate portion, so that the heat on the third plate portion can be transferred to the cabinet body main body faster, and indirectly improve the heat exchange efficiency between the heat exchange structure and the battery device.

[0031] In some embodiments, the heat dissipation structure includes at least two sheet-like structures connected to the cabinet body main body and arranged at intervals.

[0032] The technical solution of this embodiment provides a specific structure of some heat dissipation structures, so that the heat dissipation structure can have a larger surface area, so that the heat dissipation structure can better increase the heat exchange area between the cabinet and the external environment, and improve the heat dissipation efficiency of the cabinet.

[0033] In some embodiments, heat dissipation structures are provided on at least two different sides of the cabinet body main body.

[0034] In the technical solution of this embodiment, heat dissipation structures are provided on at least two sides of the cabinet body main body to further increase the heat exchange area between the cabinet and the external environment, and further improve the heat dissipation efficiency of the cabinet.

[0035] In some embodiments, the accommodating space is a space structure with an opening at one end; the cabinet body further includes a cabinet door movably connected to the cabinet body main body, and the cabinet door can cover and close the opening to separate the accommodating space from the space outside the cabinet body main body and form a closed accommodating space.

[0036] The technical solution of this embodiment provides a specific structure of some cabinet bodies, so that the cabinet body includes a cabinet door, which is convenient for the installation, maintenance and replacement of the battery device; at the same time, after the cabinet door is closed, it can also form a closed space to reduce the possible negative impact of the external environment on the battery device in the cabinet.

[0037] In a second aspect, an embodiment of the present application further provides an energy storage system, including the energy storage device provided by some embodiments of the first aspect.

[0038] In a third aspect, an embodiment of the present application further provides a charging network, including an energy storage device provided in some embodiments of the first aspect; or an energy storage system provided in some embodiments of the second aspect; and a charging pile, where the energy storage device is used to provide electric energy for the charging pile.

[0039] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0041] Figure 1 is a three-dimensional schematic diagram of the energy storage device provided in an embodiment of the present application;

[0042] Figure 2 is a cross-sectional schematic diagram of the energy storage device provided in some embodiments of the present application;

[0043] Figure 3 is a three-dimensional schematic diagram of the heat exchange structure and the battery device provided in some embodiments of the present application;

[0044] Figure 4 is a three-dimensional schematic diagram of the heat exchange structure provided in some embodiments of the present application;

[0045] Figure 5 is Figure 2 a partial enlarged schematic diagram at position A in

[0046] Figure 6 is a cross-sectional schematic diagram of the energy storage device provided in some other embodiments of the present application;

[0047] Figure 7 is a schematic diagram of the energy storage system provided in some embodiments of the present application;

[0048] Figure 8 is a schematic diagram of the charging network provided in some embodiments of the present application.

[0049] The meanings of the marks in the figure are:

[0050] 100. Energy storage device;

[0051] 10. Cabinet; 11. Cabinet body; 111. Accommodating space; 112. Opening; 12. Heat dissipation structure; 13. Cabinet door;

[0052] 20. Heat exchange structure; 21. First plate part; 22. Second plate part; 221. Heat conduction sub - part; 23. Third plate part; 24. Flow channel; 241. First flow channel; 242. Second flow channel; 243. Third flow channel;

[0053] 30. Battery device;

[0054] 200. Power conversion device;

[0055] 300. Power generation device;

[0056] 400. Charging pile;

[0057] 500. Connector. Detailed implementation manners

[0058] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion.

[0060] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary - secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means more than two unless otherwise specifically defined.

[0061] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0062] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0063] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0066] The energy storage device is a device integrating a battery device and a control cabinet. The control cabinet and the battery device are coupled and connected to manage the battery device, and realize the storage and output of electric energy through the conversion between electric energy and chemical energy. The battery device can be used as a backup power source, or perform peak shaving and valley filling when the power supply of the power system is uneven, or perform frequency modulation when the load or power generation of the power system is large, or be applied to a photovoltaic energy storage power generation system.

[0067] In the energy storage device, due to the large number of battery devices, during the charging and discharging process of the energy storage device, the temperature of the battery devices will rise and a large amount of heat will be generated, resulting in a relatively high temperature inside the energy storage device. And the battery devices are highly sensitive to the working temperature, and a relatively high working environment temperature is likely to cause the efficiency of the battery devices to decrease.

[0068] In order to enable the battery device to perform charge and discharge cycles with high efficiency, a water-cooling unit or an air-cooling unit is usually provided in the current energy storage device to reduce the temperature inside the energy storage device, so as to provide a relatively suitable working environment temperature for the battery device. However, since the cabinet of the energy storage device usually has a fixed specification and size, and the volume of the water-cooling unit or the air-cooling unit is usually large, installing the water-cooling unit or the air-cooling unit in the cabinet will occupy the installation space of the battery device, resulting in a decrease in the capacity of the energy storage device and a low power in the unit space of the energy storage device.

[0069] Moreover, the water-cooling unit or the air-cooling unit usually also needs to perform heat exchange with the external environment outside the cabinet, which requires corresponding through holes and through slots on the cabinet to extend the water-cooling unit or the air-cooling unit outside the cabinet. The through holes and through slots are also likely to cause dust, water or other impurities in the external environment to enter the cabinet, and are likely to increase the risk of damage to the battery device.

[0070] Based on the above considerations, in order to reduce the occupation of the internal space of the cabinet by the temperature control structure in the energy storage device, the embodiment of the present application provides an energy storage device, which is provided with a heat exchange structure, and the heat exchange structure includes a first plate portion, a second plate portion and a third plate portion. The first plate portion exchanges heat with the battery device, the second plate portion transfers the heat on the first plate portion to the third plate portion, and the third plate portion transfers the heat to the cabinet body, and the cabinet body can perform heat exchange with the external environment to dissipate the heat thereon, so as to achieve the heat dissipation effect.

[0071] In such an energy storage device, the heat of the battery device is transferred to the cabinet body through the heat exchange structure, and the cabinet body can be cooled by heat exchange with the external environment, thereby realizing the cooling of the battery device; at the same time, since the surface area of the cabinet body is large, the heat exchange area between the cabinet body and the external environment is also large, and the efficiency and effect of heat exchange are better; by means of the heat exchange structure and in cooperation with the heat exchange between the cabinet body and the external environment for heat dissipation, the space occupied by the water-cooling unit or the air-cooling unit is saved, so as to facilitate the installation of more battery devices in the cabinet body, improve the space utilization rate inside the cabinet body, increase the capacity of the energy storage device, and increase the power in the unit space of the energy storage device.

[0072] The energy storage device disclosed in the embodiment of the present application can be used in the industrial field, such as for load balancing and reducing peak-valley differences; it can also be used in commercial complexes to achieve peak shaving, valley filling and intelligent management of electricity, etc.

[0073] For the convenience of description, the following embodiments take a container-type energy storage device 100 in an embodiment of the present application as an example for description.

[0074] Refer to Figure 1, embodiments of the present application provide an energy storage device 100, which includes one or more battery clusters (BatteryCluster) to increase the voltage and capacity of the energy storage device 100. The battery cluster may include a plurality of battery devices 30, and the plurality of battery devices 30 are connected in series through a busbar component to increase the voltage of the energy storage device 100. When the energy storage device 100 includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device 100.

[0075] The energy storage device 100 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 100 can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device 100 can store electrical energy during low electricity consumption periods, and provide electrical energy to relevant users or electrical equipment during high electricity consumption periods. The energy storage system provided by the embodiments of the present application can be any power system that requires the use of the energy storage device 100.

[0076] In some embodiments, the energy storage device 100 is an energy storage container or an energy storage cabinet.

[0077] In some embodiments, the energy storage device 100 may include a cabinet 10 and one or more battery clusters, and the battery clusters are accommodated in the cabinet 10.

[0078] In some embodiments, the energy storage device 100 may include modules such as a thermal management module, a main control module, a total control module, a power distribution module, and a fire protection module.

[0079] As an example, the thermal management module may include a liquid cooling unit, and the liquid cooling unit provides coolant for regulating the temperature of battery cells to each battery device 30 through pipelines.

[0080] As an example, the main control module can be used as the battery management unit of the battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, it can control the charge and discharge current, voltage, etc. of the battery cluster. The main control module includes an auxiliary battery management unit SBMU (Slave Battery ManagementUnit, SBMU), a fusion switch and other modules.

[0081] As an example, the master control module can serve as the battery management unit of the energy storage device 100, and is used to monitor and manage the energy storage device 100. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device 100. For example, it can control the charge and discharge current, voltage, etc. of the energy storage device 100. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a main battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and a fiber optic conversion module and other modules.

[0082] As an example, the fire protection module includes a control panel, a detector, an alarm device, etc., and is used to detect, alarm or extinguish fires in the energy storage system.

[0083] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 100 that need power.

[0084] Reference Figure 1 to Figure 3 In a first aspect, an embodiment of the present application provides an energy storage device 100, including a cabinet 10, a battery device 30, and a heat exchange structure 20. Among them, the cabinet 10 includes a cabinet body 11, and an accommodation space 111 is provided inside the cabinet body 11; the battery device 30 is accommodated in the accommodation space 111; the heat exchange structure 20 is accommodated in the accommodation space 111, and the heat exchange structure 20 includes a first plate portion 21, and the first plate portion 21 is used to carry the battery device 30 and perform heat exchange with the battery device 30; the heat exchange structure 20 further includes a second plate portion 22 and a third plate portion 23, one side of the second plate portion 22 is connected to the first plate portion 21, the other side of the second plate portion 22 is connected to the third plate portion 23, and the third plate portion 23 is connected to the cabinet body 11 to perform heat exchange with the cabinet body 11.

[0085] In the figure, the direction where the X-axis is located is the length direction of the cabinet 10, the direction where the Y-axis is located is the width direction of the cabinet 10, and the direction where the Z-axis is located is the height direction of the cabinet 10.

[0086] The cabinet 10 refers to the structure in the energy storage device 100 that provides an installation foundation for the battery device 30 and other structures. The cabinet 10 can be used to accommodate the battery device 30 and other structures (such as a thermal management module, a master control module, etc.); the cabinet 10 can include a container, or can include other structures; the shape of the cabinet 10 can be prismatic, cylindrical or other shapes.

[0087] The cabinet body 11 refers to the structure in the cabinet 10 mainly used to form the accommodation space 111, and structures such as the battery device 30 can be accommodated in the accommodation space 111; the cabinet body 11 can be a prismatic structure, a cylindrical structure or a structure of other shapes; the material of the cabinet body 11 can include metal, plastic or other materials.

[0088] The accommodation space 111 refers to the space in the cabinet body 11 for accommodating the battery device 30 and other structures. The accommodation space 111 can be a closed space or an open space with one or more openings 112 at one end or multiple ends; the accommodation space 111 can be a prismatic space, a cylindrical space or a space of other shapes, and the shape of the accommodation space 111 can also be set according to the shape of the cabinet body 11.

[0089] The battery device 30 refers to the device in the energy storage device 100 for storing and releasing electric energy. The number of battery devices 30 can be one, or two or more. The battery device 30 can include one or more battery cells. Multiple battery cells can be connected in series, in parallel or in a combined series-parallel connection. The combined series-parallel connection means that there are both series and parallel connections among multiple battery cells. Multiple battery cells can be directly connected in series, in parallel or in a combined series-parallel connection and then the whole formed by the multiple battery cells is accommodated in a box; of course, the battery device 30 can also be in the form that multiple battery cells are first connected in series, in parallel or in a combined series-parallel connection to form battery modules, and then multiple battery modules are connected in series, in parallel or in a combined series-parallel connection to form a whole. The battery device 30 can also include other structures. For example, the battery device 30 can also include a busbar component for realizing the electrical connection among multiple battery cells.

[0090] Among them, each battery cell can be a secondary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0091] The battery device 30 is accommodated in the accommodation space 111. A bracket can be arranged in the cabinet body 11 to carry the battery device 30 through the bracket, or the battery device 30 can be directly connected to the cabinet body 11 through an intermediate structure.

[0092] The heat exchange structure 20 refers to the structure in the energy storage device 100 for performing heat exchange with the battery device 30. The battery device 30 can perform heat exchange with the heat exchange structure 20 to control the temperature of the battery device 30; for example, when the temperature of the battery device 30 is relatively high, the battery device 30 can transfer part of its heat to the heat exchange structure 20 to reduce the temperature of the battery device 30.

[0093] The heat exchange structure 20 can also perform heat exchange with the cabinet body 11 to transfer the heat on the battery device 30 to the cabinet body 11; the heat exchange structure 20 can include a plate structure, a column structure or a structure of other shapes, and the heat exchange structure 20 can also include a frame structure, etc.; the material of the heat exchange structure 20 can include metal, plastic or other materials.

[0094] The first plate portion 21 refers to the structure in the heat exchange structure 20 for carrying the battery device 30. The battery device 30 can be connected to the first plate portion 21. The battery device 30 can be fixedly connected to the first plate portion 21 by welding, bonding or other means, and the battery device 30 can also be detachably connected to the first plate portion 21 through structures such as snaps. The battery device 30 can also be only pressed on the first plate portion 21. At this time, the first plate portion 21 can provide support for the battery device 30 and can serve as the installation base of the battery device 30; the first plate portion 21 can also perform heat exchange with the corresponding battery device 30. During the charging and discharging process of the battery device 30, the heat generated by the battery device 30 can be transferred to the first plate portion 21.

[0095] The first plate portion 21 can be a solid plate structure, a solid column structure, a solid frame structure or other structures to perform heat exchange with the battery device 30 through the material characteristics of the first plate portion 21 itself; the first plate portion 21 can also be a hollow structure. At this time, a heat exchange medium (such as water, refrigerant, etc.) can be arranged inside the first plate portion 21 to perform heat exchange with the battery device 30 jointly through the heat exchange medium and the material characteristics of the first plate portion 21. The shape of the first plate portion 21 can be circular, square or other shapes; the material of the first plate portion 21 can include metal, plastic or other materials.

[0096] The number of the first plate portions 21 can be one, or two or more; when the number of the battery devices 30 is two or more, the number of the first plate portions 21 can be two or more correspondingly, and each first plate portion 21 can be respectively used to carry different battery devices 30. By way of example, the number of the first plate portions 21 is at least two.

[0097] The second plate portion 22 refers to the structure in the heat exchange structure 20 for transferring heat. The second plate portion 22 is connected to the first plate portion 21 so that the heat on the first plate portion 21 can be transferred to the second plate portion 22; the material of the second plate portion 22 can include metal, plastic or other materials, and the material of the second plate portion 22 can be the same as or different from the material of the first plate portion 21.

[0098] The second plate part 22 can be a solid plate structure, a solid column structure, a solid frame structure or other structures to transfer heat through the material characteristics of the second plate part 22 itself; the second plate part 22 can also be a hollow structure, and in this case, a heat exchange medium (such as water, refrigerant, etc.) can be arranged inside the second plate part 22 to transfer heat through the heat exchange medium and the material characteristics of the second plate part 22 together.

[0099] One side of the second plate part 22 is connected to the first plate part 21. The second plate part 22 can be connected to the first plate part 21 by welding, bonding or other means, and the second plate part 22 can also be integrally formed with the first plate part 21; the second plate part 22 is connected to the first plate part 21, and one second plate part 22 can also correspond to multiple different first plate parts 21 so that the heat on different first plate parts 21 can be transferred to the second plate part 22; the number of the second plate parts 22 can be one, or two or more.

[0100] The third plate part 23 refers to the structure in the heat exchange structure 20 for heat exchange with the cabinet body 11. The third plate part 23 is connected to the second plate part 22 so that the heat on the second plate part 22 can be transferred to the third plate part 23; the material of the third plate part 23 can include metal, plastic or other materials, and the material of the third plate part 23 can be the same as or different from the material of the second plate part 22.

[0101] The third plate part 23 can be a solid plate structure, a solid column structure, a solid frame structure or other structures to conduct heat exchange with the cabinet body 11 through the material characteristics of the third plate part 23 itself; the third plate part 23 can also be a hollow structure, and in this case, a heat exchange medium (such as water, refrigerant, etc.) can be arranged inside the third plate part 23 to conduct heat exchange with the cabinet body 11 through the heat exchange medium and the material characteristics of the third plate part 23 together.

[0102] One side of the third plate part 23 is connected to the second plate part 22. The third plate part 23 can be connected to the second plate part 22 by welding, bonding or other means, and the third plate part 23 can also be integrally formed with the second plate part 22; the number of the third plate parts 23 can be one, or two or more. In the case where there are multiple third plate parts 23, the second plate part 22 can be connected to all the multiple third plate parts 23; the third plate part 23 is connected to the cabinet body 11. The third plate part 23 can be directly connected to the cabinet body 11 by welding, bonding or other means, and the third plate part 23 can also be indirectly connected to the cabinet body 11 through an intermediate structure to facilitate the heat exchange between the third plate part 23 and the cabinet body 11.

[0103] The heat exchange structure 20 includes a first plate portion 21, a second plate portion 22, and a third plate portion 23. Part of the heat on each battery device 30 can be respectively transferred to the corresponding first plate portion 21. Part of the heat on each first plate portion 21 can be transferred to the second plate portion 22. Part of the heat on the second plate portion 22 can be transferred to the third plate portion 23. The heat on the third plate portion 23 can be transferred to the cabinet main body 11, and the cabinet main body 11 can exchange heat with the external environment to dissipate the heat on the cabinet main body 11 and reduce the temperature on the cabinet main body 11, thereby reducing the temperature of the battery device 30 and the accommodation space 111 through the above heat transfer path.

[0104] It can be understood that since the third plate portion 23 is connected to the cabinet 10 and the first plate portion 21 is connected to the battery device 30, the heat exchange structure 20 can not only transfer the heat of the battery device 30 to the cabinet 10, but also be used to carry the battery device 30. At this time, other structures for supporting or carrying the battery device 30 may not be provided inside the cabinet 10.

[0105] When the heat exchange structure 20 is provided in the energy storage device 100, the battery device 30 can transfer heat to the cabinet main body 11 through the heat exchange structure 20 and exchange heat with the external environment through the cabinet main body 11. At this time, a water cooling unit or an air cooling unit may no longer be provided inside the cabinet main body 11, so that more space can be saved inside the cabinet main body 11 to facilitate accommodating more battery devices 30, improving the power per unit space in the energy storage device 100 and the utilization rate of the accommodation space 111. At the same time, no longer providing a water cooling unit or an air cooling unit inside the energy storage device 100 can also greatly reduce the self-consumption of the energy storage device 100, thereby improving the round-trip efficiency (RTE) of the energy storage device 100.

[0106] At the same time, the heat generated by each battery device 30 during charging and discharging can be transferred to the third plate portion 23 through the second plate portion 22, which also facilitates concentrating the heat of each battery device 30 at the third plate portion 23, so that the heat can be transferred to the cabinet main body 11 more concentratedly, thereby facilitating the setting of a structure for improving the heat dissipation efficiency according to this part and reducing the difficulty of temperature control.

[0107] In this embodiment, a heat exchange structure 20 is provided. The heat exchange structure 20 includes a first plate portion 21 to facilitate heat exchange of the battery device 30. At the same time, the heat exchange structure 20 includes a second plate portion 22 and a third plate portion 23 to transfer the heat on the first plate portion 21 to the third plate portion 23 through the second plate portion 22 and transfer the heat to the cabinet body 11 through the third plate portion 23. In this setting, heat is dissipated by means of the heat exchange structure 20 in cooperation with the heat exchange between the cabinet 10 and the external environment, saving the space occupied by the water cooling unit or the air cooling unit, facilitating the installation of more battery devices 30 in the cabinet 10, and improving the space utilization rate inside the cabinet 10. At the same time, the heat is concentrated at the third plate portion 23 through the second plate portion 22, facilitating the third plate portion 23 to transfer the heat to the cabinet body 11 concentratedly and improving the heat dissipation efficiency.

[0108] Reference Figures 2 to 4 , in some embodiments, the first plate portion 21 and the second plate portion 22 are respectively located on different sides of the battery device 30, and the second plate portion 22 can perform heat exchange with the adjacent battery device 30.

[0109] The second plate portion 22 can perform heat exchange with the adjacent battery device 30. The second plate portion 22 can be directly connected to the adjacent battery device 30 or indirectly connected to the corresponding battery device 30 through an intermediate structure. The second plate portion 22 can also only abut against the adjacent battery device 30 to facilitate heat exchange between the second plate portion 22 and the adjacent battery device 30.

[0110] In the case where the second plate portion 22 passes through multiple different battery devices 30, the second plate portion 22 can perform heat exchange with each battery device 30 it passes through.

[0111] The first plate portion 21 and the second plate portion 22 are respectively located on different sides of the battery device 30 so that the first plate portion 21 and the second plate portion 22 can perform heat exchange with the battery device 30 from different sides of the battery device 30 respectively, thereby increasing the heat exchange area between the battery device 30 and the heat exchange structure 20, improving the heat exchange efficiency between the battery device 30 and the heat exchange structure 20, and at the same time reducing the risk of uneven temperature distribution on the battery device 30.

[0112] Exemplarily, in order to improve the heat exchange efficiency between the battery device 30 and the first plate portion 21, the wall surface with the largest surface area of the battery device 30 can be made to correspond to and be connected to the first plate portion 21.

[0113] In this embodiment, the second plate portion 22 can also perform heat exchange with the adjacent battery device 30, improving the heat exchange area and heat exchange efficiency between the heat exchange structure 20 and the battery device 30.

[0114] Reference Figure 2 , Figure 5, in some embodiments, a flow channel 24 is provided in the heat exchange structure 20, and a heat exchange medium is accommodated in the flow channel 24.

[0115] The flow channel 24 refers to a channel structure formed inside the heat exchange structure 20. The flow channel 24 can be a channel structure directly machined inside the heat exchange structure 20, or can also be a channel structure formed by pipes embedded in the heat exchange structure 20; the number of flow channels 24 can also be one, or can also be two or more; the flow channel 24 can be a straight channel structure extending along a straight line, or can also be a curved channel structure extending along a reference straight line. In a cross-section perpendicular to the flow channel 24, the cross-sectional shape of the flow channel 24 can be circular, square or other shapes.

[0116] According to the shape of the flow channel 24, the flow channel 24 can cover a certain side surface of the corresponding battery device 30, or can also only cover a part of a certain side surface of the corresponding battery device 30; the flow channel 24 can be provided only in one of the first plate portion 21, the second plate portion 22 or the third plate portion 23, or different parts of the flow channel 24 can be located in at least two of the first plate portion 21, the second plate portion 22 and the third plate portion 23 respectively.

[0117] A heat exchange medium is accommodated in the flow channel 24, and the heat exchange medium can flow along the flow channel 24, and the heat exchange medium can exchange heat with the battery device 30; by way of example, the heat exchange structure 20 can exchange heat with the battery device 30, and the heat exchange medium can exchange heat with the heat exchange structure 20, that is, the heat exchange medium can indirectly exchange heat with the battery device 30 through the heat exchange structure 20.

[0118] The heat exchange medium can include liquid materials, solid materials (such as powders, etc.) or gaseous materials; the heat exchange medium can include water, or can also include phase change materials, etc.

[0119] In this embodiment, a flow channel 24 is provided in the heat exchange structure 20, and a heat exchange medium is provided in the flow channel 24 to carry and transfer heat through the heat exchange medium, so as to better transfer the heat of the battery device 30 to the cabinet body 11.

[0120] Reference Figure 2 、 Figure 5 , in some embodiments, the heat exchange medium is a phase change material.

[0121] A phase change material refers to a material that can change from one physical state to another physical state to absorb or release heat. During the process of the physical state change of the phase change material, the phase change material can flow in the flow channel 24 autonomously.

[0122] Exemplarily, the phase change material may be a gas-liquid phase change material. The gas-liquid phase change material can change from a liquid state to a gaseous state and absorb heat during this process. The gas-liquid phase change material can also change from a gaseous state to a liquid state and release heat during this process; the gaseous phase change material carrying heat can flow to a position with a lower temperature and can push the liquid phase change material to a position with a higher temperature.

[0123] Exemplarily, the phase change material may also be a solid-liquid phase change material. The solid-liquid phase change material can change from a solid state to a liquid state and absorb heat during this process. The solid-liquid phase change material can also change from a liquid state to a solid state and release heat during this process; the liquid phase change material carrying heat can flow to a position with a lower temperature and can push the solid phase change material to a position with a higher temperature; it can be understood that the solid state of the solid-liquid phase change material can be granular, powdery or other solid states.

[0124] The phase change material may include tetrafluoroethane, difluoromethane, pentafluoroethane, etc.

[0125] In the case where the heat exchange medium is a phase change material, the heat exchange medium can flow autonomously during the phase change process without being driven by an external driving device. Therefore, the flow channel 24 can be a closed space structure, and the flow channel 24 can be not connected at the head and the tail.

[0126] Taking the example where the heat exchange medium can change between a liquid state and a gaseous state for illustration. When different parts of the flow channel 24 are located in the first plate part 21, the second plate part 22 and the heat exchange part respectively, in a part of the flow channel 24 located in the first plate part 21, the temperature of the battery device 30 is higher than the temperature of the heat exchange medium at the corresponding part. The heat exchange medium in this part of the flow channel 24 can absorb heat and change from a liquid state to a gaseous state to achieve heat exchange between the heat exchange medium and the battery device 30; afterwards, the gaseous part of the heat exchange medium can flow along the flow channel 24 from the first plate part 21 through the second plate part 22 to the third plate part 23; afterwards, in a part of the flow channel 24 located in the third plate part 23, the temperature of the cabinet body main body 11 is lower than the temperature of the heat exchange medium at the corresponding part. The gaseous part of the heat exchange medium can release heat and change from a gaseous state to a liquid state to achieve heat exchange between the heat exchange medium and the cabinet body main body 11; afterwards, the liquid part of the heat exchange medium can flow through the second plate part 22 to the first plate part 21 under the push of the gaseous part of the heat exchange medium. During this cycle process, the cabinet body main body 11 can exchange heat with the external environment.

[0127] In this embodiment, the heat exchange medium is a phase change material so that the phase change material can carry heat and flow autonomously in the flow channel 24 to better transfer the heat of the battery device 30 to the cabinet 10; and this setting does not require a device for driving the heat exchange medium to flow in the heat exchange structure 20, thereby being able to further reduce the space occupied by the heat exchange structure 20 and improve the utilization rate of the internal space of the cabinet 10.

[0128] Reference Figure 2 、 Figure 5 Figure 5 In some embodiments, the flow channel 24 includes a first flow channel 241 disposed in the first plate portion 21. One side of the first flow channel 241 extends to one side of the second plate portion 22 for the heat exchange medium to exchange heat with the second plate portion 22.

[0129]

[0129] The first flow channel 241 refers to the part of the flow channel 24 located in the first plate portion 21. The heat exchange medium in the first flow channel 241 can exchange heat with the battery device 30; the first flow channel 241 can be a channel structure formed in the first plate portion 21 or a channel structure formed by pipes embedded in the first plate portion 21; the first flow channel 241 can be a straight channel structure extending in a straight line or a curved channel structure extending along a reference straight line. In a cross-section perpendicular to the first flow channel 241, the cross-sectional shape of the first flow channel 241 can be circular, square or other shapes.

[0130]

[0130] One side of the first flow channel 241 extends to one side of the second plate portion 22, so that the heat exchange medium in the first flow channel 241 can flow to the vicinity of the second plate portion 22, facilitating the heat exchange between the heat exchange medium in the first flow channel 241 and the second plate portion 22 and transferring heat to the second plate portion 22.

[0131]

[0131] In the case where the heat exchange medium is a gas-liquid phase change material, the heat exchange medium in the first flow channel 241 can absorb heat and be converted from a liquid state to a gaseous state. Then, the gaseous heat exchange medium in the first flow channel 241 can autonomously flow to one end of the first flow channel 241 close to the second plate portion 22; at one end of the first flow channel 241 close to the second plate portion 22, the heat exchange medium can release heat to the second plate portion 22 and be converted from a gaseous state to a liquid state. Then, the liquid heat exchange medium in one end of the first flow channel 241 close to the second plate portion 22 can return to other parts of the first flow channel 241 and exchange heat with the battery device 30, thereby realizing the transfer of heat.

[0132]

[0132] This embodiment provides some specific structures of the flow channel 24, enabling the heat exchange medium to exchange heat with the battery device 30 in the first flow channel 241 and enabling the first flow channel 241 to extend to one side of the second plate portion 22, so that the first plate portion 21 can better exchange heat with the second plate portion 22.

[0133] Reference Figure 2 、 Figure 5 Figure 5 In some embodiments, the flow channel 24 further includes a second flow channel 242 communicating with the first flow channel 241. The second flow channel 242 is disposed in the second plate portion 22, and one side of the second flow channel 242 extends to one side of the third plate portion 23 for the heat exchange medium to exchange heat with the third plate portion 23.

[0134] The second flow channel 242 refers to the part of the flow channel 24 located in the second plate portion 22. The second flow channel 242 can be a channel structure formed within the second plate portion 22, or can be a channel structure formed by pipes embedded in the second plate portion 22; the second flow channel 242 can be a straight channel structure extending along a straight line, or can be a curved channel structure extending along a reference straight line. In a cross-section perpendicular to the second flow channel 242, the cross-sectional shape of the second flow channel 242 can be circular, square or other shapes.

[0135] One side of the second flow channel 242 is communicated with the first flow channel 241, so that the heat exchange medium in the first flow channel 241 can enter the second flow channel 242; the other side of the second flow channel 242 extends to one side of the third plate portion 23, so that the heat exchange medium in the second flow channel 242 can flow to the vicinity of the third plate portion 23, facilitating the heat exchange between the heat exchange medium in the second flow channel 242 and the third plate portion 23 and transferring heat to the third plate portion 23.

[0136] When the heat exchange medium is a gas-liquid phase change material, the heat exchange medium in the first flow channel 241 can absorb heat and be transformed from a liquid state to a gaseous state. Then, the gaseous heat exchange medium in the first flow channel 241 can autonomously flow into the second flow channel 242 and flow to one end of the second flow channel 242 close to the third plate portion 23; at one end of the second flow channel 242 close to the third plate portion 23, the heat exchange medium can release heat to the third plate portion 23 and be transformed from a gaseous state to a liquid state. Then, the liquid heat exchange medium at one end of the second flow channel 242 close to the third plate portion 23 can return to the first flow channel 241 through the second flow channel 242 and exchange heat with the battery device 30, thereby realizing the transfer of heat.

[0137] This embodiment provides some specific structures of the flow channel 24. A second flow channel 242 communicated with the first flow channel 241 is provided, and one end of the second flow channel 242 extends to one side of the third plate portion 23, so that the heat exchange medium can directly flow to the vicinity of the third plate portion 23 along the second flow channel 242 after exchanging heat with the battery device 30, enabling the second plate portion 22 to better play the role of heat transfer and enabling the second plate portion 22 to better exchange heat with the third plate portion 23.

[0138] Reference Figure 2 、 Figure 5 In some embodiments, with reference to, the flow channel 24 further includes a third flow channel 243 communicated with the second flow channel 242. The third flow channel 243 is provided in the third plate portion 23 for the heat exchange medium to exchange heat with the cabinet body main body 11.

[0139] The third flow channel 243 refers to the part of the flow channel 24 that is located in the third plate portion 23. The third flow channel 243 can be a channel structure formed within the third plate portion 23 or a channel structure formed by pipes embedded in the third plate portion 23. The third flow channel 243 can be a straight channel structure extending along a straight line or a curved channel structure extending along a reference straight line. In a cross-section perpendicular to the third flow channel 243, the cross-sectional shape of the third flow channel 243 can be circular, square, or other shapes.

[0140] One side of the third flow channel 243 communicates with the second flow channel 242, so that the heat exchange medium in the second flow channel 242 can enter the third flow channel 243, facilitating the heat exchange between the heat exchange medium in the third flow channel 243 and the cabinet body 11 and transferring heat to the cabinet body 11.

[0141] When the heat exchange medium is a gas-liquid phase change material, the heat exchange medium in the first flow channel 241 can absorb heat and be converted from a liquid state to a gaseous state. After that, the gaseous heat exchange medium in the first flow channel 241 can flow autonomously and enter the third flow channel 243 through the second flow channel 242. In the third flow channel 243, the heat exchange medium can release heat to the cabinet body 11 and be converted from a gaseous state to a liquid state. After that, the liquid heat exchange medium in the third flow channel 243 can return to the first flow channel 241 through the second flow channel 242 and exchange heat with the battery device 30, thereby realizing the transfer of heat.

[0142] This embodiment provides some specific structures of the flow channel 24. The third flow channel 243 communicating with the second flow channel 242 is provided so that the heat exchange medium can directly enter the third plate portion 23 from the first plate portion 21, facilitating the heat exchange between the heat exchange medium and the cabinet body 11, and thus the heat of the battery device 30 can be directly transferred to the cabinet body 11 through the flowing heat exchange medium, further improving the heat exchange efficiency.

[0143] Reference Figure 2 、 Figure 5 In some embodiments, along the direction in which the heat exchange medium enters the second flow channel 242 from the third flow channel 243 and flows towards the first flow channel 241, the second flow channel 242 is gradually expanded.

[0144] The heat exchange medium flowing from the third flow channel 243 through the second flow channel 242 into the first flow channel 241 refers to a part of the heat exchange medium that has released heat in the third flow channel 243. This part of the heat exchange medium can enter the first flow channel 241 through the second flow channel 242 and can absorb the heat of the battery device 30 in the first flow channel 241.

[0145] Along the direction in which the heat exchange medium enters the second flow channel 242 from the third flow channel 243 and flows towards the first flow channel 241, that is, the second flow channel 242 extends from near the third flow channel 243 towards away from the third flow channel 243; the second flow channel 242 is gradually expanded in this direction, that is, the inner diameter of the part of the second flow channel 242 farther away from the third flow channel 243 is larger.

[0146] During the process that the heat exchange medium enters each first flow channel 241 from the third flow channel 243 through the second flow channel 242, the heat exchange medium will first enter the first flow channel 241 closer to the third flow channel 243, which easily leads to a smaller amount of the heat exchange medium in the first flow channel 241 farther away from the third flow channel 243, or a slower speed of the heat exchange medium entering the first flow channel 241 farther away from the third flow channel 243. As a result, the heat dissipation effect of the battery device 30 farther away from the third plate part 23 is relatively poor, and it is easy to cause uneven heat distribution in the entire energy storage device 100.

[0147] Therefore, the inner diameter of the second flow channel 242 is gradually expanded to reduce the speed difference and quantity difference of the heat exchange medium entering each different first flow channel 241, so as to improve the heat exchange capacity of the first plate part 21 farther away from the third plate part 23, and improve the temperature uniformity and consistency of the entire energy storage device 100.

[0148] When the heat exchange medium is a gas-liquid phase change material, the gaseous heat exchange medium in the third flow channel 243 can release heat and be converted into a liquid heat exchange medium; then the liquid heat exchange medium enters each first flow channel 241 along the second flow channel 242. On the flow path of the liquid heat exchange medium in the second flow channel 242, the second flow channel 242 is gradually expanded, and the quantity and speed of the liquid heat exchange medium entering each different first flow channel 241 are approximately equal.

[0149] This embodiment provides some specific structures of the flow channels 24, such that the second flow channel 242 is gradually expanded along the direction away from the third flow channel 243. During the process that the heat exchange medium enters each first flow channel 241 from the third flow channel 243 through the second flow channel 242, the heat exchange medium easily enters the first flow channel 241 closer to the third flow channel 243 first, thus easily resulting in a smaller amount of the heat exchange medium in the first flow channel 241 far away from the third flow channel 243; therefore, the second flow channel 242 is gradually expanded to control the quantity of the heat exchange medium in each first flow channel 241, reduce the difference in the quantity of the heat exchange medium in each first flow channel 241, and improve the heat exchange uniformity and consistency of the entire heat exchange structure 20.

[0150] Reference Figure 2 、 Figure 5 In some embodiments, referring to, the extending direction of the first flow channel 241 is parallel to the width direction of the battery device 30, and the second plate part 22 is located on one side of the battery device 30 along the width direction of the battery device 30.

[0151] The extending direction of the first flow channel 241 determines the flow direction of the heat exchange medium. When the first flow channel 241 is a straight channel structure, the extending direction of the first flow channel 241 is parallel to the width direction of the battery device 30, that is, the flow direction of the heat exchange medium in the first flow channel 241 is also parallel to the width direction of the battery device 30. When the first flow channel 241 is a curved channel structure, the extending direction of the first flow channel 241 refers to the direction where the reference straight line of the first flow channel 241 is located, and this direction is parallel to the width direction of the battery device 30.

[0152] The battery device 30 includes multiple directions such as the length direction, width direction, and height direction. Among them, the size of the battery device 30 in its length direction is greater than the size of the battery device 30 in its width direction.

[0153] Since the heat that the heat exchange medium can carry is limited, after the heat exchange medium absorbs heat and completely undergoes a phase change, the heat exchange medium is in a superheated state. At this time, the heat dissipation effect of the heat exchange medium on the battery device 30 will be reduced. And the longer the path that the heat exchange medium flows through in the first flow channel 241, the more heat the heat exchange medium needs to carry, and the higher the risk of overheating in the downstream of the first flow channel 241. Overheating of the heat exchange medium in the downstream of the first flow channel 241 easily leads to uneven heat distribution of the battery device 30.

[0154] Therefore, the extending direction of the first flow channel 241 is made parallel to the width direction of the battery device 30, so that the flow path of the heat exchange medium in the first flow channel 241 is shorter. This setting can reduce the risk of overheating in the downstream of the first flow channel 241, thereby improving the heat exchange efficiency between the first plate portion 21 and the battery device 30, and improving the temperature uniformity and consistency of the battery device 30.

[0155] This embodiment provides some specific structures of the flow channels 24, making the first flow channel 241 extend along the width direction of the battery device 30 to shorten the flow path of the heat exchange medium in the first flow channel 241, thereby improving the uniformity and consistency of the heat exchange between the first plate portion 21 and the battery device 30, and also improving the heat exchange efficiency between the first plate portion 21 and the battery device 30.

[0156] Reference Figures 2 to 4 In some embodiments, the number of the second plate portions 22 is at least two. At least two second plate portions 22 are connected to different sides of the first plate portion 21, and at least two second plate portions 22 are connected to different sides of the third plate portion 23.

[0157] The number of the second plate portions 22 is at least two, that is, the number of the second plate portions 22 can be two, or can be three or more; when there are two second plate portions 22, the two opposite sides of the first plate portion 21 are respectively connected to the second plate portions 22, and the two opposite sides of the third plate portion 23 are also respectively connected to the second plate portions 22, so that the first plate portion 21 can transfer heat to the third plate portion 23 through the two connected second plate portions 22, and also enable the two second plate portions 22 to transfer heat to the third plate portion 23, thereby improving the heat transfer efficiency from the first plate portion 21 to the third plate portion 23.

[0158] When the number of the second plate portions 22 is at least two, a second flow channel 242 can be arranged in each second plate portion 22 to transfer heat better.

[0159] Different second plate portions 22 can be connected to different sides of the first plate portion 21. At this time, different second plate portions 22 are also located on different sides of the battery device 30. When the second plate portion 22 can perform heat exchange with the adjacent battery device 30, this setting can better improve the heat exchange efficiency between the heat exchange structure 20 and the battery device 30 and improve the heat dissipation efficiency of the heat exchange structure 20.

[0160] In this embodiment, the number of the second plate portions 22 is at least two to improve the heat transfer efficiency of each second plate portion 22.

[0161] Reference Figure 6 , in some embodiments, the second plate portion 22 includes at least two heat conducting sub - portions 221. Each heat conducting sub - portion 221 is connected to the third plate portion 23, and at least two heat conducting sub - portions 221 are respectively connected to different first plate portions 21.

[0162] The heat conducting sub - portion 221 refers to the sub - structure in the second plate portion 22 for transferring heat. The heat conducting sub - portion 221 can be a plate - like structure, can also be a columnar structure or a structure with other shapes. The heat conducting sub - portion 221 can be a circular structure, a square structure or a structure with other shapes; the second plate portion 22 includes at least two heat conducting sub - portions 221, that is, the number of the heat conducting sub - portions 221 can be two, or can be three or more; the heat conducting sub - portions 221 in the same second plate portion 22 can be connected or can be not connected to each other.

[0163] Each heat conducting sub - portion 221 is connected to the third plate portion 23 so that the heat conducting sub - portion 221 can transfer heat to the third plate portion 23.

[0164] At least two heat-conducting sub-parts 221 are respectively connected to different first plate parts 21. At this time, one heat-conducting sub-part 221 can be connected to only one first plate part 21, or can be connected to two first plate parts 21 or more first plate parts 21; and different heat-conducting sub-parts 221 are not connected to the same first plate part 21. By way of example, each first plate part 21 is respectively connected to a different heat-conducting sub-part 221, that is, the first plate parts 21 and the heat-conducting sub-parts 221 are in one-to-one correspondence, so that each first plate part 21 can transfer heat to the third plate part 23 through the corresponding second plate part 22.

[0165] It can be understood that in the case where the second plate part 22 includes at least two heat-conducting sub-parts 221, a second flow channel 242 can be provided in each heat-conducting sub-part 221, and the second flow channels 242 in each heat-conducting sub-part 221 can be communicated with the third flow channel 243 in the third plate part 23. At the same time, one end of the second flow channel 242 in each heat-conducting sub-part 221 can be respectively communicated with the first flow channel 241 in the connected first plate part 21.

[0166] Under this setting, each first plate part 21 can transfer heat to the third plate part 23 through the corresponding heat-conducting sub-part 221, and the heat transfer efficiency of the first plate part 21 farther from the third plate part 23 is not easily interfered by other first plate parts 21, thereby improving the heat transfer efficiency.

[0167] This embodiment provides some specific structures of the second plate part 22. By providing the heat-conducting sub-parts 221, different third plate parts 23 can transfer heat to the third plate part 23 through different heat-conducting sub-parts 221, improving the heat transfer efficiency and at the same time reducing the temperature difference between different first plate parts 21.

[0168] In some embodiments, the heat exchange structure 20 is a heat-conducting structural member.

[0169] The heat exchange structure 20 is a heat-conducting structural member, that is, the material of the heat exchange structure 20 includes a heat-conducting material, so that the heat exchange structure 20 can transfer heat; in the case where the heat exchange structure 20 includes the first plate part 21 and the third plate part 23, the first plate part 21 and the third plate part 23 can both be heat-conducting structures, that is, the materials of the first plate part 21 and the third plate part 23 can both include heat-conducting materials. At this time, the materials of the first plate part 21 and the third plate part 23 can be the same or different.

[0170] The material of the heat exchange structure 20 can include metals, ceramics, plastics or other materials; by way of example, the material of the heat exchange structure 20 can include copper, aluminum, alumina, boron nitride, graphite, etc.

[0171] When the heat exchange structure 20 is a heat conducting structural member, flow channels 24 and phase change materials can be arranged inside the heat exchange structure 20. The heat exchange structure 20 can also be a solid structure without arranging the flow channels 24. When the heat exchange structure 20 is a solid structure without flow channels 24 arranged inside, the heat of the battery device 30 can be transferred to the cabinet body 11 only through the heat transfer performance of the heat exchange structure 20 itself.

[0172] In this embodiment, the heat exchange structure 20 is a heat conducting structural member, so that the heat exchange structure 20 can transfer the heat on the battery device 30 to the cabinet 10 better and more efficiently.

[0173] Reference Figure 2 、 Figure 6 In some embodiments, the cabinet 10 further includes a heat dissipation structure 12 provided on the outer surface of the cabinet body 11, and the heat dissipation structure 12 corresponds to the third plate portion 23.

[0174] The heat dissipation structure 12 refers to a structure in the cabinet 10 that can exchange heat with the external environment. The heat dissipation structure 12 can include structures such as fins, and can also include devices such as evaporators. According to the specific structure of the heat dissipation structure 12, the heat dissipation structure 12 can be connected to the cabinet body 11 by welding, screwing or other means, and the heat dissipation structure 12 can also be integrally formed with the cabinet body 11. The heat dissipation structure 12 can be provided only on a certain outer surface of the cabinet body 11, or heat dissipation structures 12 can be provided on different outer surfaces of the cabinet body 11. The material of the heat dissipation structure 12 can include metals, plastics or other materials, and the material of the heat dissipation structure 12 can be the same as or different from the material of the cabinet body 11.

[0175] The heat dissipation structure 12 is provided on the outer surface of the cabinet body 11, so that the heat dissipation structure 12 can directly exchange heat with the external environment to dissipate the temperature on the cabinet body 11. The setting of the heat dissipation structure 12 can increase the heat exchange area between the cabinet 10 and the external environment, thereby improving the heat exchange efficiency between the cabinet body 11 and the external environment.

[0176] The heat dissipation structure 12 corresponds to the third plate portion 23, that is, the third plate portion 23 and the heat dissipation structure 12 are respectively located on the inner and outer sides of a certain side wall of the cabinet body 11. Since the third plate portion 23 can exchange heat with the cabinet body 11, the heat at the portion of the cabinet body 11 corresponding to the third plate portion 23 is relatively high. Therefore, the heat dissipation structure 12 is made to correspond to the third plate portion 23, so that the portion of the cabinet body 11 corresponding to the third plate portion 23 can exchange heat with the external environment better and faster to reduce the temperature and improve the heat dissipation efficiency.

[0177] In this embodiment, a heat dissipation structure 12 is provided to increase the heat exchange area between the cabinet body 11 and the external environment, thereby improving the heat exchange efficiency between the cabinet body 11 and the external environment; the heat dissipation structure 12 is made to correspond to the third plate portion 23 so that the heat on the third plate portion 23 can be transferred to the cabinet body 11 more quickly, and indirectly improve the heat exchange efficiency between the heat exchange structure 20 and the battery device 30.

[0178] Reference Figure 2 、 Figure 6 , in some embodiments, the heat dissipation structure 12 includes at least two sheet-like structures connected to the cabinet body 11 and spaced apart.

[0179] The heat dissipation structure 12 includes at least two sheet-like structural members connected to the cabinet body 11. The number of the sheet-like structural members can be two, or three or more; the sheet-like structural members can be square sheet-like structures, circular sheet-like structures or sheet-like structural members of other shapes; the material of the sheet-like structural members can include metals, plastics or other materials; according to the material of the sheet-like structural members, the sheet-like structural members can be connected to the cabinet body 11 by welding, bonding or other means, or the sheet-like structural members can also be integrally formed with the cabinet body 11.

[0180] At least two sheet-like structural members are spaced apart, that is, the air flow in the external environment can flow through the spaced space between adjacent two sheet-like structural members to increase the heat exchange area between the sheet-like structural members and the external environment.

[0181] Making the heat dissipation structure 12 include at least two sheet-like structural members, at this time the heat dissipation structure 12 can increase the heat exchange area between the cabinet 10 and the external environment, and can improve the heat exchange efficiency between the cabinet 10 and the external environment, so as to better reduce the temperature of the cabinet 10, and further better reduce the temperature of the battery device 30.

[0182] This embodiment provides some specific structures of the heat dissipation structure 12 so that the heat dissipation structure 12 can have a larger surface area, so that the heat dissipation structure 12 can better increase the heat exchange area between the cabinet 10 and the external environment and improve the heat dissipation efficiency of the cabinet 10.

[0183] In some embodiments, the heat dissipation structure 12 is provided on at least two different sides of the cabinet body 11.

[0184] The heat dissipation structure 12 is provided on at least two different sides of the cabinet body 11, that is, the heat dissipation structure 12 can be provided on only two different outer surfaces of the cabinet body 11, or can be provided on three or more different outer surfaces of the cabinet body 11.

[0185] Under this setting, the contact area between the cabinet body 11 and the external environment is greatly increased, and the heat dissipation performance of the cabinet body 11 is stronger, so that the heat on the cabinet body 11 can be reduced more quickly; when the heat dissipation efficiency of the cabinet body 11 is relatively high, the heat carried by the gas in the accommodation space 111 can also be transferred to the cabinet body 11 more quickly, and the gas can also exchange heat with the battery cell assembly more quickly and efficiently, thereby improving the heat dissipation performance of the entire energy storage device 100.

[0186] In this embodiment, heat dissipation structures 12 are provided on at least two sides of the cabinet body 11 to further increase the heat exchange area between the cabinet 10 and the external environment, and further improve the heat dissipation efficiency of the cabinet 10.

[0187] Reference Figure 2 、 Figure 6 , in some embodiments, the accommodation space 111 is a space structure with an opening 112 at one end; the cabinet 10 further includes a cabinet door 13 movably connected to the cabinet body 11, and the cabinet door 13 can cover and close the opening 112 to separate the accommodation space 111 from the space outside the cabinet body 11 and form a closed accommodation space 111.

[0188] The opening 112 refers to the structure through which the accommodation space 111 communicates with the external environment. The opening 112 can be a cylindrical space structure, a prismatic space structure or a space structure of other shapes; the opening 112 can be provided on one side of the cabinet body 11, and the battery device 30 can be installed in the cabinet body 11 through the opening 112, and the battery device 30 can also be taken out of the cabinet body 11 through the opening 112, so as to facilitate the installation, maintenance and replacement of the battery device 30.

[0189] The cabinet door 13 refers to the structure in the cabinet 10 for closing the opening 112. The cabinet door 13 can be connected to the cabinet body 11 and cover the opening 112. At this time, the accommodation space 111 is a closed space separated from the external environment; the shape of the cabinet door 13 can be circular, square or other shapes; the cabinet door 13 can be detachably connected to the cabinet body 11 through structures such as bolts and buckles, and the cabinet door 13 can also be movably connected to the cabinet body 11 through structures such as slide rails and hinges; the material of the cabinet door 13 can include metals, plastics or other materials, and the material of the cabinet door 13 can be the same as or different from the material of the cabinet body 11.

[0190] When the cabinet door 13 covers the opening 112, the accommodation space 111 is a closed space and is separated from the external environment; since the heat of the battery cell assembly is conducted to the cabinet body 11 by the flowing gas, and the cabinet body 11 can directly exchange heat with the external environment, the accommodation space 111 can dissipate the heat of the battery device 30 without being connected to the external environment. Accordingly, after the cabinet door 13 covers the cabinet body 11, external impurities (such as water, dust, etc.) are difficult to enter the accommodation space 111, thereby reducing the possible damage and interference of the external environment to the battery device 30.

[0191] This embodiment provides some specific structures of the cabinet 10, making the cabinet 10 include a cabinet door 13 to facilitate the installation, maintenance and replacement of the battery device 30; at the same time, after the cabinet door 13 is closed, it can also form a closed space to reduce the possible negative impact of the external environment on the battery device 30 in the cabinet 10.

[0192] In some embodiments, the energy storage device 100 includes a cabinet 10, a battery device 30 and a heat exchange structure 20.

[0193] The cabinet 10 includes a cabinet body 11 and a cabinet door 13. The cabinet body 11 has an accommodation space 111 with an opening 112 at one end. The battery device 30 and the heat exchange structure 20 are both accommodated in the accommodation space 111. The cabinet door 13 is movably connected to the cabinet body 11 to cover or open the opening 112; when the cabinet door 13 covers the opening 112, the accommodation space 111 is a closed space and is separated from the external environment.

[0194] A heat dissipation structure 12 is provided on the cabinet body 11. The heat dissipation structure 12 includes a plurality of sheet-like structural members, and the heat dissipation structure 12 is connected to the outer surface of the top of the cabinet body 11.

[0195] The heat exchange structure 20 includes a first plate portion 21, a second plate portion 22 and a third plate portion 23. There are a plurality of first plate portions 21. The plurality of first plate portions 21 are arranged at intervals along the height direction Z of the cabinet 10. Second plate portions 22 are respectively connected to both sides of each first plate portion 21 along the width direction Y of the cabinet 10. The upper end of the second plate portion 22 along the height direction Z of the cabinet 10 is connected to the third plate portion 23, and the third plate portion 23 is connected to the cabinet body 11.

[0196] Each battery device 30 is respectively connected to each first plate portion 21.

[0197] The heat of the battery device 30 can be transferred to the cabinet body 11 through the first plate portion 21, the second plate portion 22 and the third plate portion 23, and the cabinet body 11 can exchange heat with the external environment to reduce the heat on the cabinet body 11.

[0198] Reference Figure 7, Second aspect, embodiments of the present application further provide an energy storage system, including the energy storage device 100 provided by some embodiments of the first aspect; the energy storage system further includes a power conversion device, and the power conversion device is used to electrically connect the power generation device and the energy storage device 100.

[0199] Exemplarily, the energy storage system may include one or more energy storage devices 100 and a power conversion device 200 (Power Converter System, abbreviated as PCS), and the power conversion device 200 is used to be connected between the power generation device 300 and the energy storage device 100. The power generation device 300 is used to generate electric energy, and the electric energy generated by the power generation device 300 can be stored in the energy storage device 100 through the power conversion device 200. As an example, the power generation device 300 may specifically be a solar panel, a hydroelectric power generation device 300, a thermal power generation device 300, a wind power generation device 300, etc. Among them, the specific type of the power generation device 300 is not limited in the present application.

[0200] Reference Figure 8 , Third aspect, embodiments of the present application further provide a charging network, including the energy storage device 100 provided by some embodiments of the first aspect, or the energy storage system provided by some embodiments of the second aspect; the charging network further includes a charging pile 400, and the energy storage device 100 is used to provide electric energy for the charging pile 400.

[0201] The charging pile 400 is electrically connected to the energy storage device 100, and the energy storage device 100 is used to provide electric energy for the charging pile 400. The charging pile 400 and the battery device 30 in the energy storage device 100 are electrically connected through a cable, and the battery device 30 can provide the electric energy stored by itself to the charging pile 400. The charging pile 400 has one or more connectors 500, and the connectors 500 are used to connect with an electrical device (such as a vehicle), so as to replenish energy to the electrical device.

[0202] The energy storage device 100 may be located inside the charging pile 400 (such as an integrated storage and charging machine), or may be located outside the charging pile 400.

[0203] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An energy storage device, characterized in that, Comprising: A cabinet body, the cabinet body including a cabinet main body, and an accommodation space is provided inside the cabinet main body; A battery device, accommodated in the accommodation space; A heat exchange structure, accommodated in the accommodation space, the heat exchange structure including a first plate portion, the first plate portion being used for carrying the battery device and performing heat exchange with the battery device; The heat exchange structure further includes a second plate portion and a third plate portion, one side of the second plate portion is connected to the first plate portion, the other side of the second plate portion is connected to the third plate portion, and the third plate portion is connected to the cabinet main body to perform heat exchange with the cabinet main body and enable the cabinet main body to dissipate heat to the external environment.

2. The energy storage device according to claim 1, characterized in that, The first plate portion and the second plate portion are respectively located on different sides of the battery device, and the second plate portion can perform heat exchange with an adjacent battery device.

3. The energy storage device according to claim 1, characterized in that, A flow channel is provided inside the heat exchange structure, and a heat exchange medium is accommodated in the flow channel.

4. The energy storage device according to claim 3, characterized in that, The heat exchange medium is a phase change material.

5. The energy storage device according to claim 3, characterized in that, The flow channel includes a first flow channel provided in the first plate portion, and one side of the first flow channel extends to one side of the second plate portion for the heat exchange medium to perform heat exchange with the second plate portion.

6. The energy storage device according to claim 5, wherein The flow channel further includes a second flow channel communicated with the first flow channel, the second flow channel is provided in the second plate portion, and one side of the second flow channel extends to one side of the third plate portion for the heat exchange medium to perform heat exchange with the third plate portion.

7. The energy storage device according to claim 6, wherein The flow channel further includes a third flow channel communicated with the second flow channel, the third flow channel is provided in the third plate portion for the heat exchange medium to perform heat exchange with the cabinet main body.

8. The energy storage device according to claim 7, characterized in that, Along the direction in which the heat exchange medium enters the second flow channel from the third flow channel and flows to the first flow channel, the second flow channel is gradually expanded.

9. The energy storage device according to claim 5, characterized in that, The extending direction of the first flow channel is parallel to the width direction of the battery device, and the second plate portion is located on one side of the battery device along the width direction of the battery device.

10. The energy storage device according to claim 1, wherein, The number of the second plate portions is at least two, at least two second plate portions are connected to different sides of the first plate portion, and at least two second plate portions are connected to different sides of the third plate portion.

11. The energy storage device according to any one of claims 1-10, characterized in that, The second plate portion includes at least two heat conduction sub-portions, each heat conduction sub-portion is connected to the third plate portion, and at least two heat conduction sub-portions are respectively connected to different first plate portions.

12. The energy storage device according to any one of claims 1-10, characterized in that, The heat exchange structure is a heat conduction structure member.

13. The energy storage device according to any one of claims 1-10, characterized in that, The cabinet body further includes a heat dissipation structure provided on the outer surface of the cabinet main body, and the heat dissipation structure corresponds to the third plate portion.

14. The energy storage device according to claim 13, wherein, The heat dissipation structure includes at least two sheet-like structures connected to the cabinet main body and arranged at intervals.

15. The energy storage device according to claim 13, characterized in that, The heat dissipation structure is provided on at least two different sides of the cabinet main body.

16. The energy storage device according to any one of claims 1-10, characterized in that, The accommodation space is a space structure with an opening at one end; The cabinet body further includes a cabinet door movably connected to the cabinet main body, and the cabinet door can cover and close the opening to separate the accommodation space from the space outside the cabinet main body and form a closed accommodation space.

17. A energy storage system, characterized in that, Comprising the energy storage device according to any one of claims 1-16.

18. A charging network, characterized in that, Comprising the energy storage device according to any one of claims 1-16; or the energy storage system according to claim 17; and Charging pile, and the energy storage device is used to provide electric energy for the charging pile.

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