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 body which comprises a cabinet main body, and the interior of the cabinet main body is provided with a first space; the battery monomer assembly is directly accommodated in the first space; the bearing structure is connected to the cabinet body and used for bearing the battery monomer assemblies, the bearing structure is arranged to divide the first space into at least two second spaces, and the second spaces are used for accommodating at least part of the battery monomer assemblies; the thermal management assembly includes a gas flow channel including at least a portion of a space outside the battery cell assembly within the first space and / or the second space. According to the energy storage device provided by the embodiment of the invention, the gas in the first space can pass through each battery monomer assembly, so that the temperature on the battery monomer assembly is reduced through the flowing gas; and meanwhile, the gas in the first space can exchange heat with the external environment through the cabinet main body, so that heat transfer is realized.

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 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 is usually large, and water-cooling pipelines need to be arranged to cool each battery device, the setting of the water-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, including a cabinet body, having a first space inside the cabinet body; a battery cell assembly directly accommodated in the first space; a bearing structure connected to the cabinet and used for bearing the battery cell assembly, the bearing structure being arranged to divide the first space into at least two second spaces, and the second spaces being used for accommodating at least part of the battery cell assembly; a thermal management assembly, including a gas flow channel formed in the first space, the gas flow channel including at least part of the space outside the battery cell assembly in the first space; and / or the gas flow channel including at least part of the space outside the battery cell assembly in the second space; the thermal management assembly is used to guide the gas to transfer the heat of the battery cell assembly to the cabinet body for the cabinet body to dissipate the heat to the external environment.

[0006] In the technical solution of this embodiment, the second space is defined in the first space through the bearing structure, and the gas flow channel is arranged so that the gas in the first space can pass through each battery cell assembly through the flowing gas, and the temperature on the battery cell assembly is reduced through the flowing gas; at the same time, the gas in the first space can exchange heat with the cabinet body to reduce the temperature of the gas, and the cabinet body can directly exchange heat with the external environment to achieve heat transfer.

[0007] In some embodiments, the bearing structure includes a support plate connected to the cabinet, and the battery cell assembly is connected to the support plate; the second space is a space structure set on the support plate and used for accommodating the battery cell assembly.

[0008] The technical solution of this embodiment provides specific structures for some load-bearing structures. A support plate is provided to carry the battery cell assembly through the support plate. At the same time, when the load-bearing structure only includes the support plate, the second space can be a more open space, and the second space is more easily connected to the first space. Gas can flow through different sides of the battery cell assembly and can circulate better in the first space and the periphery of the battery cell assembly to more efficiently reduce the temperature of the battery cell assembly.

[0009] In some embodiments, the support plate is a heat-conducting structural member.

[0010] In the technical solution of this embodiment, the support plate is made into a heat-conducting structural member so that different parts of the battery cell assembly can conduct heat exchange with the support plate, thereby reducing the temperature difference between different parts of the battery cell assembly through the support plate and improving the temperature uniformity and consistency of the battery cell assembly.

[0011] In some embodiments, the support plate is a metal plate member; or a flow channel is provided in the support plate, and a heat exchange medium including a phase change material is accommodated in the flow channel.

[0012] In the technical solution of this embodiment, a flow channel and a phase change material are provided in the support plate to balance the temperatures of different parts of the battery device and the support plate through the phase change material, so as to further improve the temperature uniformity and consistency of the battery cell assembly.

[0013] In some embodiments, the load-bearing structure includes a support frame connected to the cabinet body, and the battery cell assembly is connected to the support frame; the second space is formed within the support frame.

[0014] In the technical solution of this embodiment, the load-bearing structure is made to include a frame structure so that there can be a larger heat exchange area between the battery cell assembly and the gas, thereby improving the heat exchange efficiency between the gas and the battery cell assembly.

[0015] In some embodiments, the thermal management component further includes a blower provided in the first space, and the blower is used to drive the gas to flow in the gas flow channel.

[0016] In the technical solution of this embodiment, a blower is provided in the cabinet body to drive the gas to flow in the first space through the blower and increase the flow rate of the gas in the first space, thereby improving the heat exchange efficiency and the heat dissipation efficiency.

[0017] In some embodiments, the blower is electrically connected to the battery cell assembly.

[0018] In the technical solution of this embodiment, the blower is powered by the battery cell assembly so that the blower does not need to be connected to an external power source, thereby making the cabinet body not need to be connected to the outside world and improving the sealing performance of the cabinet.

[0019] In some embodiments, the cabinet body further includes a heat dissipation structure connected to the outer surface of the cabinet body to dissipate the heat on the cabinet body to the external environment.

[0020] The technical solution of this embodiment provides some specific structures of the cabinet body. A heat dissipation structure is provided on the outer surface of the cabinet body to increase the heat exchange area between the cabinet body and the external environment, improve the heat dissipation performance of the cabinet body, and be able to increase the cooling rate of the gas in the first space, so as to facilitate better cooling of the temperature of the battery cell assembly in the first space.

[0021] In some embodiments, heat dissipation structures are provided on at least two different sides of the cabinet body.

[0022] In the technical solution of this embodiment, heat dissipation structures are provided on at least two sides of the cabinet 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.

[0023] In some embodiments, the heat dissipation structure is provided on the top of the cabinet body, or the heat dissipation structure is provided on the side wall of the cabinet body.

[0024] In the technical solution of this embodiment, the heat dissipation structure is provided on the top or side wall of the cabinet body to increase the heat exchange area between the cabinet body and the external environment and improve the heat dissipation performance of the cabinet body.

[0025] In some embodiments, the first 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, and the cabinet door can cover and close the opening to separate the first space from the space outside the cabinet body and form a closed first space.

[0026] The technical solution of this embodiment provides some specific structures of the cabinet body, making the cabinet body include a cabinet door to facilitate the installation, maintenance and replacement of the battery cell assembly; at the same time, after the cabinet door is closed, it can also form a closed first space to reduce the possible negative impacts of the external environment on the battery cell assembly in the cabinet.

[0027] In some embodiments, a slide rail is provided in the cabinet body, and one end of the slide rail extends to the opening; the carrying structure is slidably connected to the slide rail.

[0028] The technical solution of this embodiment provides some specific structures of the cabinet body. A slide rail is provided in the cabinet body and the carrying structure can slide along the slide rail to facilitate the removal, installation, etc. of the carrying structure.

[0029] In a second aspect, the embodiments of the present application further provide an energy storage system, including the energy storage device provided by some embodiments of the first aspect.

[0030] In a third aspect, an embodiment of the present application further provides a charging network, including an energy storage device provided by some embodiments of the first aspect; or an energy storage system provided by some embodiments of the second aspect; and a charging pile. The energy storage device is used to supply electric energy to the charging pile.

[0031] 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 description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically gives the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the preferred embodiments below, 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. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0033] Figure 1 is a schematic perspective view of an energy storage device provided by some embodiments of the present application;

[0034] Figure 2 is a schematic cross-sectional view of an energy storage device provided by some embodiments of the present application;

[0035] Figure 3 is an exploded structural view of a battery cell assembly and a carrier structure provided by some embodiments of the present application;

[0036] Figure 4 is a schematic perspective view of a battery cell assembly and a carrier structure provided by some embodiments of the present application;

[0037] Figure 5 is a schematic cross-sectional view of a carrier structure provided by some embodiments of the present application;

[0038] Figure 6 is a schematic diagram of an energy storage system provided by some embodiments of the present application;

[0039] Figure 7 is a schematic diagram of a charging network provided by some embodiments of the present application.

[0040] The meanings of the marks in the drawings are as follows:

[0041] 100, energy storage device;

[0042] 10, cabinet; 11, cabinet body; 111, first space; 112, opening; 12, heat dissipation structure; 13, cabinet door;

[0043] 20, battery cell assembly;

[0044] 30. Bearing structure; 301. Second space; 31. Support plate; 311. Flow channel; 32. Support frame;

[0045] 40. Fan

[0046] 200. Power conversion device

[0047] 300. Power generation device

[0048] 400. Charging pile

[0049] 500. Connector Detailed implementation manners

[0050] 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 illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0051] 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 drawings are intended to cover non-exclusive inclusion.

[0052] 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 of" means more than two unless otherwise specifically defined.

[0053] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may 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 will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0055] In the description of the embodiments of the present application, the term "plurality" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0056] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated 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 to the embodiments of the present application.

[0057] 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 circumstances.

[0058] An 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.

[0059] 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.

[0060] In order to enable the battery device to perform charge and discharge cycles with high efficiency, a water-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 is usually large, and water-cooling pipelines need to be provided to cool each battery device, installing the water-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.

[0061] Moreover, the water-cooling unit usually needs to exchange heat with the external environment outside the cabinet, which requires corresponding through holes and through slots on the cabinet for the water-cooling unit to extend outside the cabinet. However, the through holes and through slots are likely to cause dust, water or other impurities in the external environment to enter the cabinet, and easily increase the risk of damage to the battery device.

[0062] At the same time, since the main heat-generating component of the battery device is the battery cell assembly, the battery cell assembly is usually arranged in a box, and there is usually a gap between the box and the battery cell assembly, and it is difficult for the box and the battery cell assembly to be in full contact or fit, which makes it difficult for the heat of the battery cell assembly to be transferred to the box in a timely and complete manner. And the water-cooling unit and the water-cooling pipelines are usually arranged outside the box, and it is difficult for the water-cooling pipelines to directly contact the battery cell assembly for heat exchange, that is, the cooling efficiency of the water-cooling unit for the battery cell assembly is low.

[0063] 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 sets a bearing structure and forms a second space by the bearing structure to accommodate the battery cell assembly. At the same time, a first space is set in the cabinet to accommodate other structures such as the battery cell assembly and the bearing structure through the first space; the second space can communicate with the first space so that gas can flow between the first space and the second space.

[0064] The gas flowing between the first space and the second space can exchange heat with the battery cell assembly to carry heat and flow from the second space to the first space to reduce the temperature of the battery cell assembly and the temperature in the second space; and the gas in the first space can exchange heat with the side wall of the cabinet during the process of flowing through the side wall of the cabinet to transfer the heat to the side wall of the cabinet, and the side wall of the cabinet can exchange heat with the external environment to dissipate the heat.

[0065] In such an energy storage device, it is only necessary to set up a fan to drive the gas to flow inside the cabinet. Compared with the scheme of a water-cooled unit, the occupation of the internal space of the cabinet is greatly reduced, so that more battery monomer components can be installed inside the cabinet. At the same time, since the gas inside the cabinet only needs to exchange heat with the cabinet, the cabinet can be completely enclosed, and the first space and the external environment can be better separated, thereby improving the sealing performance of the cabinet and reducing the risk of external impurities entering the cabinet and damaging the battery monomer components.

[0066] The energy storage device disclosed in the embodiments of the present application can be used in the industrial field, such as for load balancing and reducing the peak-valley difference; it can also be used in commercial complexes to achieve peak shaving, valley filling and intelligent management of electricity, etc.

[0067] For the convenience of description in the following embodiments, a container-type energy storage device 100 in an embodiment of the present application is taken as an example for description.

[0068] Reference Figure 1 , the 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, and the plurality of battery devices 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.

[0069] 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 electric energy as needed and output electric energy at an appropriate time. For example, the energy storage device 100 can store electric energy during low electricity consumption periods, and provide electric energy for 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.

[0070] In some embodiments, the energy storage device 100 is an energy storage container or an energy storage electric cabinet.

[0071] 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.

[0072] 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.

[0073] As an example, the thermal management module may include a liquid-cooled unit, and the liquid-cooled unit provides coolant for regulating the temperature of battery monomers to each battery device through pipelines.

[0074] As an example, the master control module can serve as the battery management unit of the battery cluster, and is used to monitor and manage the battery cluster. The master 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 master control module includes an auxiliary battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch and other modules.

[0075] As an example, the total 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 total 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 total 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.

[0076] 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 the energy storage system.

[0077] As an example, the power distribution module can be used to distribute power to the modules that need electricity in the energy storage device 100.

[0078] Reference Figure 1 、 Figure 2 In a first aspect, some embodiments of the present application provide an energy storage device 100, including a cabinet 10, a battery cell assembly 20, a bearing structure 30 and a thermal management component. Among them, the cabinet 10 includes a cabinet body 11, and a first space 111 is provided inside the cabinet body 11; the battery cell assembly 20 is directly accommodated in the first space 111; the bearing structure 30 is connected to the cabinet 10 and is used to bear the battery cell assembly 20, and the bearing structure 30 is arranged to divide the first space 111 into at least two second spaces 301, and the second space 301 is used to accommodate at least part of the battery cell assembly 20; the thermal management component includes a gas flow channel formed in the first space 111, and the gas flow channel includes at least part of the space outside the battery cell assembly 20 in the first space 111; and / or the gas flow channel includes at least part of the space outside the battery cell assembly 20 in the second space 301; the thermal management component is used to guide the gas to transfer the heat of the battery cell assembly 20 to the cabinet body 11, so that the cabinet body 11 can dissipate the heat to the external environment.

[0079] In the figure, the direction of the X-axis is the length direction of the cabinet body 10, the direction of the Y-axis is the width direction of the cabinet body 10, and the direction of the Z-axis is the height direction of the cabinet body 10.

[0080] The cabinet body 10 refers to the structure in the energy storage device 100 that provides an installation basis for the battery device and other structures. The cabinet body 10 can be used to accommodate the battery device and other structures (such as a thermal management module, a main control module, etc.); the cabinet body 10 can include a container or other structures; the shape of the cabinet body 10 can be prismatic, cylindrical or other shapes.

[0081] The cabinet body main body 11 refers to the structure in the cabinet body 10 that is mainly used to form the first space 111. Structures such as the battery device can be accommodated in the first space 111; the cabinet body main body 11 can be a prismatic structure, a cylindrical structure or a structure of other shapes; the material of the cabinet body main body 11 can include metal, plastic or other materials.

[0082] The first space 111 refers to the space in the cabinet body main body 11 for accommodating the battery device and other structures. The first space 111 can be a closed space or an open space with one or more openings 112 at one end; the first space 111 can be a prismatic space, a cylindrical space or a space of other shapes, and the shape of the first space 111 can also be set according to the shape of the cabinet body main body 11.

[0083] The battery cell assembly 20 refers to the structure in the energy storage device 100 that provides voltage and capacity. The battery cell assembly 20 can include one, two or more battery cells; among them, a battery cell refers to the smallest unit in the energy storage device 100 that provides voltage and capacity. When the battery cell assembly 20 includes multiple battery cells, the multiple battery cells can be connected in series, parallel or in a hybrid connection through a busbar component. For example, the battery cell assembly 20 can be a battery module, and at this time, the battery module can be formed by bundling multiple battery cells through structures such as cable ties.

[0084] The bearing structure 30 refers to the structure in the energy storage device 100 that bears the battery cell assembly 20. The bearing structure 30 is a structure that can provide an installation and fixing basis for the battery cells; the bearing structure 30 can be a plate-like structure, a box-like structure or a frame structure; the bearing structure 30 is connected to the cabinet body 10. The bearing structure 30 can be directly connected to the cabinet body 10 by screwing, bonding, welding or other means, or the bearing structure 30 can also be indirectly connected to the cabinet body 10 through an intermediate structure to fix the battery cell assembly 20 in the cabinet body 10; the battery cell assembly 20 can be connected to the bearing structure 30 by bonding, welding, clamping or other means so that the bearing structure 30 can stably support the battery cell assembly 20; the material of the bearing structure 30 can include metal, plastic or other materials.

[0085] The load-bearing structure 30 can serve as the housing of the battery cell assembly 20 and provide protection for the battery cell assembly 20; for example, the load-bearing structure 30 can be a housing.

[0086] The second space 301 refers to the space formed on the load-bearing structure 30. According to the specific structure of the load-bearing structure 30, the second space 301 can be a space formed inside the load-bearing structure 30 or a space set on the load-bearing structure 30; according to the specific structures of the load-bearing structure 30 and the second space 301, the battery cell assembly 20 can be only partially accommodated in the second space 301 or completely accommodated in the second space 301.

[0087] The second space 301 is used to accommodate at least a part of the battery cell assembly 20, and the battery cell assembly 20 is also directly accommodated in the first space 111, that is, gas can enter the second space 301 from the first space 111, and can also enter the first space 111 from the second space 301. According to the specific structure of the load-bearing structure 30, when the load-bearing structure 30 is a box structure or a box-shaped structure, openings, intake channels, exhaust channels and other structures can be provided on the box structure or the box-shaped structure to connect the second space 301 with the first space 111; when the load-bearing structure 30 is a plate structure or a frame structure, the second space 301 itself is an open space, that is, the second space 301 itself can be connected with the first space 111 without setting additional structures.

[0088] For example, the load-bearing structure 30 can serve as the housing of the battery cell assembly 20. At this time, the load-bearing structure 30 can be a box structure with one end open.

[0089] When the gas enters the second space 301, it can exchange heat with the battery cell assembly 20 and take away the heat on the battery cell assembly 20; when the gas carries heat into the first space 111 and flows near the side wall of the cabinet body 10, the gas can exchange heat with the side wall of the cabinet body 10 and transfer the heat to the side wall of the cabinet body 10, and the cabinet body 10 can exchange heat with the external environment to reduce the heat on the cabinet body 10.

[0090] The thermal management component refers to the structure in the energy storage device for controlling the temperature inside the cabinet; the thermal management component includes a gas flow channel. The gas flow channel refers to the space structure for gas to flow through. The gas flow channel can be a space structure surrounded by structural members such as pipes. At this time, the gas flow channel is located inside the structural members such as pipes. The gas flow channel can also be a space structure set in the space.

[0091] The gas flow channel may include at least part of the spatial structure outside the battery cell assembly 20 in the first space 111. The gas flow channel may only include part of the space in the first space 111, or may include all other spaces outside the battery cell assembly 20 in the first space 111. The gas may flow in the first space 111 outside the battery cell assembly 20. At this time, the flowing gas may exchange heat with the battery cell assembly 20 located in the first space 111 and can exchange heat with the cabinet body 11 to transfer the heat on the battery cell assembly 20 to the cabinet body 11. The gas flow channel may also include at least part of the spatial structure outside the battery cell assembly 20 in the second space 301. The gas flow channel may only include part of the space in the second space 301, or may include all other spaces outside the battery cell assembly 20 in the second space 301. At this time, the flowing gas may exchange heat with the battery cell assembly 20 located in the second space 301 and can exchange heat with the cabinet body 11 to transfer the heat on the battery cell assembly 20 to the cabinet body 11.

[0092] The gas flow channel may be only located in the first space 111 or the second space 301, or a part of the gas flow channel may be located in the first space 111 and another part may be located in the second space 301.

[0093] Exemplarily, the air flow channel is a spatial structure set inside the first space 111. A part of the gas flow channel is located in the first space 111 and another part is located in the second space 301, so as to facilitate the heat exchange between the gas and the battery cell assembly 20 and facilitate the heat exchange between the gas and the cabinet body 11.

[0094] During the charging and discharging process of the energy storage device 100, the temperature of the battery cell assembly 20 rises and causes the temperature of the energy storage device 100 to rise. At this time, the gas can flow in the cabinet body 11. The flowing gas can enter the second space 301 and exchange heat with the battery cell assembly 20. At this time, the temperature of the gas in the second space 301 rises while the temperature of the battery cell assembly 20 decreases. The gas with increased temperature can enter the first space 111 from the second space 301 and flow to the vicinity of the side wall of the cabinet 10. After that, the gas with increased temperature can exchange heat with the side wall of the cabinet 10 and transfer the heat to the side wall of the cabinet 10. At this time, the temperature of the gas decreases, and the cabinet 10 can exchange heat with the external environment to reduce its own temperature. The temperature change of the gas can cycle according to the above process as it flows, so as to reduce the temperature on the battery cell assembly 20 and can reduce the temperature in the first space 111, providing a better ambient temperature for the efficient operation of the battery cell assembly 20.

[0095] It can be understood that during the charging and discharging process of the battery cell assembly 20 and when its temperature rises, the temperature of the gas around the battery cell assembly 20 is relatively high, while the temperature of the gas at other positions in the first space 111 is relatively low. At this time, the gas will flow spontaneously under the temperature difference; or a structure for driving the gas flow path can be provided inside the cabinet body 11 to increase the gas flow speed.

[0096] In this embodiment, the second space 301 is defined in the first space 111 through the bearing structure 30, and a gas flow path is provided so that the gas in the first space 111 can pass through each battery cell assembly 20 through the gas in the flow path, and the temperature of the battery cell assembly 20 can be reduced by the flowing gas; at the same time, the gas in the first space 111 can exchange heat with the cabinet body 11 to reduce the temperature of the gas, and the cabinet body 11 can directly exchange heat with the external environment to achieve heat transfer.

[0097] Compared with the scheme of the water-cooling unit, this embodiment greatly reduces the occupation of the internal space of the cabinet 10, so that more battery cell assemblies 20 can be installed in the cabinet 10; at the same time, since the gas in the cabinet 10 only needs to exchange heat with the cabinet 10, the cabinet 10 can be completely enclosed, and the first space 111 and the external environment can be better separated, thereby improving the sealing performance of the cabinet 10 and reducing the risk of external impurities entering the cabinet 10 and damaging the battery cell assembly 20.

[0098] Reference Figure 2 、 Figure 3 In some embodiments, the bearing structure 30 includes a support plate 31 connected to the cabinet 10, and the battery cell assembly 20 is connected to the support plate 31; the second space 301 is a space structure set on the support plate 31 and used to accommodate the battery cell assembly 20.

[0099] The support plate 31 refers to the structure in the bearing structure 30 used to connect with the battery cell assembly 20. The support plate 31 can provide an installation and fixing foundation for the battery cell assembly 20; the support plate 31 can be a circular plate structure, a square plate structure or a plate structure of other shapes; the battery cell assembly 20 is connected to the support plate 31, and the battery cell assembly 20 can be connected to the support plate 31 by bonding, welding, clamping or other means; the material of the support plate 31 can include metal, plastic or other materials.

[0100] When the load-bearing structure 30 only includes the support plate 31, the second space 301 is the space set on the support plate 31. At this time, the second space 301 is an open space, and the gas in the first space 111 can flow into the second space 301 from various different directions except the direction where the support plate 31 is located, and perform heat exchange with the battery cell assembly 20; in this setting, there is a larger heat exchange area between the battery cell assembly 20 and the gas, improving the heat exchange efficiency between the battery cell assembly 20 and the gas.

[0101] It can be understood that structures such as the wiring harness, fuse, and battery management system related to the battery cell assembly 20 can also be installed on the support plate 31. These structures can be directly installed on the support plate 31 or indirectly installed on the support plate 31 through intermediate structures.

[0102] This embodiment provides some specific structures of the load-bearing structure 30. The support plate 31 is provided to support the battery cell assembly 20 through the support plate 31; at the same time, when the load-bearing structure 30 only includes the support plate 31, the second space 301 can be a more open space, and the second space 301 is more easily connected to the first space 111. The gas can flow through different sides of the battery cell assembly 20 and can better circulate around the first space 111 and the battery cell assembly 20 to more efficiently reduce the temperature of the battery cell assembly 20.

[0103] In some embodiments, the shown support plate 31 is a heat-conducting structural member.

[0104] The support plate 31 is a heat-conducting structural member, that is, the material of the support plate 31 includes a heat-conducting material so that the support plate 31 can conduct heat; the material of the support plate 31 can include metals, ceramics, plastics, or other materials; for example, the material of the support plate 31 can include copper, aluminum, alumina, boron nitride, graphite, etc.

[0105] When the support plate 31 is a heat-conducting structural member, flow channels 311 and phase change materials can be provided inside the support plate 31, or the support plate 31 can be a solid structure without providing the flow channels 311.

[0106] The support plate 31 is a heat-conducting structural member, that is, the support position has good heat conduction performance. During the charging and discharging process of the battery cell assembly 20, part of the heat of the battery cell assembly 20 can also be conducted to the support plate 31, and the heat can be transferred inside the support plate 31 and make the heat everywhere on the support plate 31 tend to be equal. At this time, the support plate 31 with uniform heat distribution can reversely affect the heat distribution on the battery cell assembly 20, thereby improving the uniformity and consistency of the temperature on the battery cell assembly 20 and improving the charging and discharging efficiency of the battery cell assembly 20.

[0107] The support plate 31 is a heat-conducting structural member. Part of the heat of the battery cell assembly 20 can be conducted to the support plate 31. At this time, the gas in the first space 111 can also exchange heat with the support plate 31 and reduce the temperature of the support plate 31, so as to indirectly reduce the temperature of the side of the battery cell assembly 20 connected to the support plate 31, thereby better reducing the temperature of the battery cell assembly 20.

[0108] In this embodiment, the support plate 31 is made into a heat-conducting structural member so that different parts of the battery cell assembly 20 can exchange heat with the support plate 31, thereby reducing the temperature difference of different parts of the battery cell assembly 20 through the support plate 31 and improving the temperature uniformity and consistency of the battery cell assembly 20.

[0109] Reference Figure 5 , in some embodiments, the support plate 31 is a metal plate member; or a flow channel 311 is provided in the support plate 31, and a heat exchange medium is accommodated in the flow channel 311, and the heat exchange medium includes a phase change material.

[0110] The support plate 31 is a metal plate member, that is, the material of the support plate 31 includes metal, and the material of the support plate 31 can include copper, iron or other metal materials; this setting can make the support plate 31 have good heat conduction performance to facilitate the heat transfer from the battery cell assembly 20 to the support plate 31.

[0111] The flow channel 311 refers to a channel structure formed inside the support plate 31. The flow channel 311 can be a channel structure directly processed inside the support plate 31, or a channel structure formed by a pipe embedded in the support plate 31; the number of the flow channels 311 can also be one, or two or more; the flow channel 311 can be a straight channel structure extending along a straight line, or a curved channel structure extending along a reference straight line. In the cross-section perpendicular to the flow channel 311, the cross-sectional shape of the flow channel 311 can be circular, square or other shapes.

[0112] According to the shape of the flow channel 311, the flow channel 311 can correspond to a part of the surface of the battery cell assembly 20 connected to the support plate 31, or the flow channel 311 can completely correspond to the surface of the battery cell assembly 20 connected to the support plate 31.

[0113] A heat exchange medium is accommodated in the flow channel 311. The heat exchange medium can flow along the flow channel 311, and the heat exchange medium can exchange heat with the battery cell assembly 20; for example, the support plate 31 can exchange heat with the battery cell assembly 20, and the heat exchange medium can exchange heat with the support plate 31, that is, the heat exchange medium can indirectly exchange heat with the battery cell assembly 20 through the support plate 31.

[0114] The heat exchange medium is a phase change material. A phase change material refers to a material that can change from one physical state to another to absorb or release heat. During the process of the physical state change of the phase change material, the phase change material can flow autonomously within the flow channel 311.

[0115] Exemplarily, the phase change material can 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.

[0116] Exemplarily, the phase change material can 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.

[0117] The phase change material can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc.

[0118] When 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 311 can be a closed space structure, and the flow channel 311 can be not connected at the head and tail.

[0119] After making the heat exchange medium be a phase change material, it is not easy for the phase change material to cause the temperature of the support plate 31 to rise when absorbing and releasing heat, so that the battery cell assembly 20 can be better cooled. At the same time, the phase change material can flow autonomously within the flow channel 311 after absorbing heat, so that the temperature uniformity and consistency of different parts of the support plate 31 can be improved, and the temperature uniformity and consistency of the battery cell assembly 20 can be improved.

[0120] In this embodiment, a flow channel 311 and a phase change material are arranged in the support plate 31 to balance the temperatures of different parts of the battery device and the support plate 31 through the phase change material, so as to further improve the temperature uniformity and consistency of the battery cell assembly 20.

[0121] Reference Figure 4 , in some embodiments, the bearing structure 30 includes a support frame 32 connected to the cabinet 10, and the battery cell assembly 20 is connected to the support frame 32; a second space 301 is formed within the support frame 32.

[0122] The support frame 32 refers to the structure in the load-bearing structure 30 that is connected to the battery cell assembly 20. The support frame 32 can provide an installation and fixation foundation for the battery cell assembly 20. The support frame 32 is a frame structure. The support frame 32 can include a plurality of beam bodies with different lengths and connected to each other, and these beam bodies can be located in different planes to form a three-dimensional space structure; the beam bodies in the support frame 32 can be cylindrical structures, prismatic structures or structures of other shapes; the battery cell assembly 20 is connected to the support frame 32, and the battery cell assembly 20 can be connected to the support frame 32 by bonding, welding, clamping or other means; the material of the support frame 32 can include metal, plastic or other materials.

[0123] The support frame 32 can provide support for the battery cell assembly 20 in multiple directions. At the same time, the support frame 32 can also provide an installation foundation for structures such as wire harnesses, fuses, and battery management systems, so that these structures can be more conveniently installed at different required positions.

[0124] In the case where the load-bearing structure 30 only includes the support frame 32, the second space 301 is the space structure surrounded by the support frame 32. At this time, the second space 301 can communicate with the first space 111 from multiple different directions. The gas in the first space 111 can flow into the second space 301 from various different directions and perform heat exchange with the battery cell assembly 20.

[0125] The setting of the support frame 32 can reduce the shielding area of the load-bearing structure 30 on the battery cell assembly 20, that is, it can increase the heat exchange area between the battery cell assembly 20 and the gas, thereby improving the heat dissipation efficiency of the battery cell assembly 20.

[0126] In this embodiment, the load-bearing structure 30 includes a frame structure so that there can be a larger heat exchange area between the battery cell assembly 20 and the gas, thereby improving the heat exchange efficiency between the gas and the battery cell assembly 20.

[0127] Reference Figure 1 、 Figure 2 Referring to

[0128] The fan 40 refers to the structure in the energy storage device 100 that is used to drive the gas to flow inside the cabinet 10. The fan 40 can be a centrifugal fan, an axial flow fan, a mixed flow fan or other types of fans; the number of fans 40 can be one, or two or more; the fan 40 can be located at the bottom of the cabinet body 11, or at the upper part of the cabinet body 11.

[0129] Since the fan 40 is mainly used to drive the gas to flow inside the cabinet body 11 without exchanging the gas inside the cabinet body 11 with the gas in the external environment, the cabinet body 11 can be a closed structure to reduce the possible damage and interference caused by the external environment to the battery cell components 20, the fan 40 and other structures inside the cabinet body 11.

[0130] In this embodiment, a fan 40 is arranged inside the cabinet body 11 to drive the gas to flow in the first space 111 through the fan 40 and increase the flow rate of the gas in the first space 111, thereby improving the heat exchange efficiency and the heat dissipation efficiency.

[0131] In some embodiments, the fan 40 is electrically connected to the battery cell component 20.

[0132] The fan 40 is electrically connected to the battery cell component 20. The fan 40 can be electrically connected to a certain battery cell component 20 in the cabinet body 11. The fan 40 can be connected to the battery cell component 20 through a wire harness or other electrical connection structures. At this time, the battery cell component 20 can supply power to the fan 40. When the fan 40 is electrically connected to the battery cell component 20, the fan 40 does not need to be electrically connected to other devices outside the cabinet 10. Correspondingly, there is no need to provide an opening 112 for the electrical connection of the fan 40 on the cabinet body 11, and the cabinet body 11 can be a complete structure without the opening 112. At this time, when the cabinet door 13 is closed on the cabinet body 11, the cabinet 10 can form a closed first space 111 to reduce the risk of impurities (such as water, dust, etc.) in the external environment entering the interior of the cabinet 10, so as to better protect the battery cell component 20, improve the safety performance of the battery cell component 20, and reduce the interference of the external environment.

[0133] In this embodiment, the battery cell component 20 supplies power to the fan 40 so that the fan 40 does not need to be connected to an external power source, thereby enabling the cabinet body 11 not to communicate with the outside world and improving the sealing performance of the cabinet 10.

[0134] Reference Figure 1 、 Figure 2 Referring to

[0135] The heat dissipation structure 12 refers to the structure in the cabinet body 10 that can conduct heat exchange with the external environment. The heat dissipation structure 12 can include structures such as fins, or 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 main body 11 by welding, screwing or other means, and the heat dissipation structure 12 can also be integrally formed with the cabinet body main body 11; the heat dissipation structure 12 can be provided only on a certain outer surface of the cabinet body main body 11, or heat dissipation structures 12 can be provided on different outer surfaces of the cabinet body main 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 main body 11.

[0136] The heat dissipation structure 12 is provided on the outer surface of the cabinet body main body 11 so that the heat dissipation structure 12 can directly conduct heat exchange with the external environment to dissipate the temperature on the cabinet body main 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 main body 11 and the external environment.

[0137] In this embodiment, the heat dissipation structure 12 is provided on the cabinet body main body 11 to improve the heat exchange efficiency between the cabinet body main body 11 and the external environment, and to enable the cabinet 10 to dissipate heat better, thereby being able to better reduce the temperature of the battery device and the overall temperature of the energy storage device 100.

[0138] Reference Figure 2 , in some embodiments, the heat dissipation structure 12 includes at least two plate-like structures connected to the cabinet body main body 11 and arranged at intervals.

[0139] The heat dissipation structure 12 includes at least two sheet-like structural members connected to the cabinet body main body 11. The number of the sheet-like structural members can be two, or can also be three or more; the sheet-like structural member can be a square sheet-like structure, a circular sheet-like structure or a sheet-like structural member of other shapes; the material of the sheet-like structural member can include metals, plastics or other materials; according to the material of the sheet-like structural member, the sheet-like structural member can be connected to the cabinet body main body 11 by welding, bonding or other means, and the sheet-like structural member can also be integrally formed with the cabinet body main body 11.

[0140] At least two sheet-like structural members are arranged at intervals, that is, the air flow in the external environment can flow through the interval space between adjacent two sheet-like structural members to increase the heat exchange area between the sheet-like structural member and the external environment.

[0141] 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, thereby being able to better reduce the temperature of the cabinet 10, and further being able to better reduce the temperature of the battery device.

[0142] This embodiment provides some specific structures of the cabinet body 10. A heat dissipation structure 12 is provided on the outer surface of the cabinet body main body 11 to increase the heat exchange area between the cabinet body main body 11 and the external environment, improve the heat dissipation performance of the cabinet body main body 11, and can increase the cooling speed of the gas in the first space 111, so as to facilitate better cooling of the battery monomer assembly 20 by the gas in the first space 111.

[0143] In some embodiments, the heat dissipation structure 12 is provided on at least two different sides of the cabinet body main body 11.

[0144] The heat dissipation structure 12 is provided on at least two different sides of the cabinet body main body 11, that is, the heat dissipation structure 12 can be provided on only two different outer surfaces of the cabinet body main body 11, or can be provided on three or more different outer surfaces of the cabinet body main body 11.

[0145] Under this setting, the contact area between the cabinet body main body 11 and the external environment is greatly increased, and the heat dissipation performance of the cabinet body main body 11 is stronger, so that the heat on the cabinet body main body 11 can be reduced more quickly; when the heat dissipation efficiency of the cabinet body main body 11 is relatively high, the heat carried by the gas in the first space 111 can also be transferred to the cabinet body main body 11 more quickly, and the gas can also exchange heat with the battery monomer assembly 20 more quickly and efficiently, so as to improve the heat dissipation performance of the entire energy storage device 100.

[0146] 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.

[0147] Reference Figure 1 、 Figure 2 In some embodiments, the heat dissipation structure 12 is provided on the top of the cabinet body main body 11, or the heat dissipation structure 12 is provided on the side wall of the cabinet body main body 11.

[0148] The heat dissipation structure 12 is provided on the top of the cabinet body main body 11. The top of the cabinet body main body 11 is the top end of the cabinet body main body 11 along its height direction Z. Since the gas with a higher temperature has a smaller density and the gas with a lower temperature has a larger density, that is, the heated gas will move upward in the first space 111. Therefore, the heat dissipation structure 12 is provided on the top of the cabinet body main body 11 to facilitate heat exchange between the cabinet body main body 11 and the heated gas.

[0149] The heat dissipation structure 12 can also be arranged on the side wall of the cabinet body 11, so that the cabinet body 11 can exchange heat with the external environment more efficiently; the heat dissipation structure 12 can be arranged only on one side wall of the cabinet body 11, or on different side walls of the cabinet body 11.

[0150] In this embodiment, the heat dissipation structure 12 is arranged on the top or side wall of the cabinet body 11 to increase the heat exchange area between the cabinet body 11 and the external environment and improve the heat dissipation performance of the cabinet body 11.

[0151] Reference Figure 1 、 Figure 2 , in some embodiments, the first 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 first space 111 from the space outside the cabinet body 11 and form a closed first space 111.

[0152] The opening 112 refers to the structure through which the first 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 arranged on one side of the cabinet body 11, and the battery device can be installed in the cabinet body 11 through the opening 112, and the battery device can also be taken out of the cabinet body 11 through the opening 112 to facilitate the installation, maintenance and replacement of the battery device.

[0153] 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 first 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 metal, plastic 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.

[0154] When the cabinet door 13 covers the opening 112, the first space 111 is a closed space and is separated from the external environment; since the heat of the battery cell assembly 20 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 first space 111 can achieve heat dissipation of the battery device without communicating with 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 first space 111, so that the damage and interference that the external environment may cause to the battery device can be reduced.

[0155] This embodiment provides some specific structures of the cabinet 10, such that the cabinet 10 includes a cabinet door 13, which facilitates the installation, maintenance, and replacement of the battery cell assembly 20. At the same time, after the cabinet door 13 is closed, it can also form a closed first space 111 to reduce the possible negative impacts of the external environment on the battery cell assembly 20 inside the cabinet 10.

[0156] In some embodiments, a slide rail is provided inside the cabinet body 11, and one end of the slide rail extends to the opening 112; the carrying structure 30 is slidably connected to the slide rail.

[0157] The slide rail refers to the structure on the cabinet body 11 for guiding the movement of the carrying structure 30, and the slide rail can also provide support for the carrying structure 30. The slide rail can be a long groove structure recessed in the cabinet body 11 or a strip structure protruding from the cabinet body 11. According to the structure of the slide rail, the slide rail can be directly connected to or provided on the cabinet body 11, or indirectly connected to the cabinet body 11 through an intermediate structure (such as a bracket, etc.).

[0158] The carrying structure 30 is slidably connected to the slide rail, that is, a part of the carrying structure 30 can cooperate with the slide rail to slide along the slide rail. For example, a roller structure can be provided on the carrying structure 30 to facilitate the sliding of the carrying structure 30 along the slide rail.

[0159] One end of the slide rail extends to the opening 112, that is, the carrying structure 30 installed with the battery cell assembly 20 can move along the slide rail from inside the cabinet body 11 to outside the cabinet body 11, which is convenient for the staff to repair or replace. During the installation of the battery cell assembly 20, the carrying structure 30 installed with the battery cell assembly 20 can also move from the opening 112 to inside the cabinet body 11.

[0160] This embodiment provides some specific structures of the cabinet 10. A slide rail is provided inside the cabinet body 11, and the carrying structure 30 can slide along the slide rail to facilitate the removal, installation, etc. of the carrying structure 30.

[0161] In some embodiments, the energy storage device 100 includes a cabinet 10, a battery cell assembly 20, a carrying structure 30, and a blower 40.

[0162] The cabinet 10 includes a cabinet body 11 and a cabinet door 13. A heat dissipation structure 12 is provided on the cabinet body 11. The heat dissipation structure 12 includes a plurality of spaced sheet-like structures, and the heat dissipation structure 12 is connected to the outside of the top of the cabinet body 11 along the height direction Z of the cabinet body 11.

[0163] A first space 111 is provided inside the cabinet body 11. The battery cell assembly 20, the bearing structure 30, and the fan 40 are all accommodated in the first space 111. The cabinet door 13 is rotatably connected to the cabinet body 11 and can cover the opening 112 of the first space 111 to enclose the first space 111.

[0164] A slide rail is provided inside the cabinet body 11. The bearing structure 30 can slide along the slide rail to enter or exit the first space 111.

[0165] The bearing structure 30 includes a support plate 31, and the battery cell assembly 20 is connected to the support plate 31.

[0166] The fan 40 is provided inside the first space 111 and is electrically connected to a certain battery cell assembly 20.

[0167] When the cabinet door 13 covers the opening 112, the fan 40 can be started to drive the gas to flow inside the cabinet body 11. The flowing gas can exchange heat with the battery cell assembly 20 to reduce the temperature on the battery cell assembly 20. Then the gas temperature rises and flows upward along the height direction Z of the cabinet body 11. The gas carrying the temperature flows to the upper part of the cabinet body 11 and exchanges heat with the cabinet body 11, transferring the heat to the cabinet body 11. The cabinet body 11 and the heat dissipation structure 12 can exchange heat with the external environment, so that the heat on the cabinet body 11 can be dissipated to the outside.

[0168] Reference Figure 6 In a second aspect, an energy storage system according to an embodiment of the present application further includes an energy storage device 100 provided in some embodiments of the first aspect. The energy storage system further includes a power conversion device for electrically connecting a power generation device and the energy storage device 100.

[0169] 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). The power conversion device 200 is used to connect between a 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 hydraulic 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.

[0170] Reference Figure 7, Thirdly, 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.

[0171] 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 in the energy storage device 100 are electrically connected through a cable, and the battery device can provide the electric energy stored in 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 supply energy to the electrical device.

[0172] The energy storage device 100 can be located inside the charging pile 400 (such as an integrated storage and charging machine) or outside the charging pile 400.

[0173] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended 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 make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by 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 falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, Comprising: A cabinet body, including a cabinet body main body, within which there is a first space; A battery cell assembly, directly accommodated within the first space; A bearing structure, connected to the cabinet body and used for bearing the battery cell assembly, the bearing structure being configured to divide the first space into at least two second spaces, and the second spaces being used to accommodate at least part of the battery cell assembly; A thermal management assembly, including a gas flow channel formed within the first space, the gas flow channel including at least part of the space outside the battery cell assembly within the first space; and / or the gas flow channel including at least part of the space outside the battery cell assembly within the second space; The thermal management assembly is used to guide gas to transfer the heat of the battery cell assembly to the cabinet body main body for the cabinet body main body to dissipate the heat to the external environment.

2. The energy storage device according to claim 1, wherein The bearing structure includes a support plate connected to the cabinet body, and the battery cell assembly is connected to the support plate; The second space is a space structure set on the support plate and used to accommodate the battery cell assembly.

3. The energy storage device according to claim 2, wherein The support plate is a heat-conducting structural member.

4. The energy storage device according to claim 2, wherein, The support plate is a metal plate member; or A flow channel is provided within the support plate, and a heat exchange medium is accommodated within the flow channel, and the heat exchange medium includes a phase change material.

5. The energy storage device according to claim 1, wherein The bearing structure includes a support frame connected to the cabinet body, and the battery cell assembly is connected to the support frame; The second space is formed within the support frame.

6. The energy storage device according to any one of claims 1-5, characterized in that, The thermal management assembly further includes a fan provided within the first space, and the fan is used to drive gas to flow within the gas flow channel.

7. The energy storage device according to claim 6, characterized in that, The fan is electrically connected to the battery cell assembly.

8. The energy storage device according to any one of claims 1-5, characterized in that, The cabinet body further includes a heat dissipation structure connected to the outer surface of the cabinet body main body to dissipate the heat on the cabinet body main body to the external environment.

9. The energy storage device according to claim 8, wherein, The heat dissipation structure is provided on at least two different sides of the cabinet body main body.

10. The energy storage device according to claim 8, wherein The heat dissipation structure is provided on the top of the cabinet body main body, or the heat dissipation structure is provided on the side wall of the cabinet body main body.

11. The energy storage device according to claim 8, characterized in that, The first space is a space structure having 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 first space from the space outside the cabinet body main body and form a closed first space.

12. The energy storage device according to claim 11, wherein, A slide rail is provided within the cabinet body main body, and one end of the slide rail extends to the opening; The bearing structure is slidably connected to the slide rail.

13. An energy storage system, characterized in that, Including the energy storage device according to any one of claims 1 - 12.

14. A charging network, characterized in that, Including the energy storage device according to any one of claims 1 - 12; or the energy storage system according to claim 13; and A charging pile, and the energy storage device is used to supply electrical energy to the charging pile.

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