Energy storage device, energy storage system and charging network

Abstract

The utility model relates to the technical field of energy storage systems, and provides an energy storage device, an energy storage system and a charging network, the energy storage device comprises a cold storage structure, a circulating pump and a plurality of energy storage electric cabinets, each energy storage electric cabinet comprises a cabinet body and a heat management module arranged in the cabinet body, and the cold storage structure is arranged outside the cabinet body of the plurality of energy storage electric cabinets. The cold storage structure is connected to the heat management module through a cold storage pipeline, and the circulating pump is arranged on the cold storage pipeline; according to the energy storage device provided by the embodiment of the invention, under the condition of high-power operation of the energy storage electric cabinet caused by power grid fluctuation or electric energy shortage, the cooling medium stored in the cold storage structure can be used to be guided into the heat management module through the effect of the circulating pump, so that the requirement of the heat management module for refrigeration power is reduced; therefore, the burden of the heat management module on the power grid can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage system technology, and in particular provides an energy storage device, an energy storage system and a charging network. Background Technology

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

[0003] Energy storage systems serve as supplementary and backup systems for the power grid. In situations such as grid fluctuations or power shortages, energy storage systems operate at high power to balance the grid load. However, energy storage systems generate a significant amount of heat when operating at high power, thus requiring a certain level of cooling.

[0004] The cooling effect of energy storage systems is mainly achieved through heat exchange via a cyclically supplied cooling medium provided by the thermal management module. However, the operation of the thermal management module is directly powered by the power grid, which further burdens the grid even when it is already under heavy load. Therefore, reducing the burden on the power grid from the thermal management module has become an urgent problem to be solved. Utility Model Content

[0005] The purpose of this application is to provide an energy storage device, an energy storage system, and a charging network, aiming to solve the problem that the thermal management module of the energy storage device in the related technology places a heavy burden on the power grid when operating at high power.

[0006] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0007] In a first aspect, embodiments of this application provide an energy storage device, including a cold storage structure, a circulating pump, and multiple energy storage cabinets. Each energy storage cabinet includes a cabinet body and a thermal management module disposed within the cabinet body. The cold storage structure is disposed outside the cabinet body of the multiple energy storage cabinets and is connected to the thermal management module via a cold storage pipeline. The circulating pump is disposed on the cold storage pipeline.

[0008] The beneficial effects of the embodiments of this application are as follows: The energy storage device provided in the embodiments of this application has a cold storage structure connected to the thermal management modules of multiple energy storage cabinets through cold storage pipelines. When the heat generation of the energy storage cabinet is low, the thermal management module can operate at low power to cool and introduce a cooling medium into the cold storage structure so that the cold storage structure can store cold energy. When the power grid fluctuates or the power shortage causes the energy storage cabinet to operate at high power, the cooling medium stored in the cold storage structure can be introduced into the thermal management module through the action of a circulation pump to reduce the cooling power demand of the thermal management module, thereby effectively reducing the burden of the thermal management module on the power grid.

[0009] In some embodiments, the thermal management modules are arranged in parallel on the cold storage pipeline.

[0010] By adopting the above technical solution, the cold storage structure can provide cooling medium to each thermal management module through the circulating pump and cold storage pipeline, and the influence between the thermal management modules is low.

[0011] In some embodiments, the thermal management modules of at least two of the multiple energy storage cabinets are connected in series, and the two thermal management modules connected in series are connected in parallel with the thermal management modules of the other energy storage cabinets.

[0012] By adopting the above technical solution, the cold storage structure can provide cooling medium to one or more thermal management modules connected in parallel through a circulating pump and cold storage pipeline.

[0013] In some embodiments, a normally closed connector is provided on the cold storage pipeline, which is located between the circulating pump and the thermal management module.

[0014] By adopting the above technical solution, the normally closed joint can prevent the cooling medium from flowing back when the circulating pump stops running.

[0015] In some embodiments, the energy storage device further includes an energy storage container, which includes a container body and a plurality of energy storage cabinets disposed within the container body, with the cold storage structure externally disposed within the container body; the circulation pump is externally disposed within the container body, or the circulation pump is disposed inside the energy storage container.

[0016] By adopting the above technical solution, the cold storage structure can be placed outside the enclosure and used through the thermal management modules of multiple energy storage cabinets inside the enclosure via a circulating pump and cold storage pipeline.

[0017] In some embodiments, the cold storage structure is located on the top of the enclosure.

[0018] By adopting the above technical solution, the cold storage structure set on the top of the box has a certain gravitational potential energy, which can reduce the power requirements of the circulating pump.

[0019] In some embodiments, the cold storage structure is buried in the ground below the enclosure.

[0020] By adopting the above technical solutions, the thermal insulation effect of the cold storage structure buried in the ground is better, and the loss of cold energy of the cooling medium stored in the cold storage structure is smaller.

[0021] In some embodiments, a base is also provided at the bottom of the housing, and the projection of the cold storage structure is located within the range of the base in the direction of gravity.

[0022] By adopting the above technical solution, the projection of the cold storage structure in the direction of gravity is set within the range of the base. The weight of the energy storage container borne by the base will not act on the cold storage structure, thereby reducing the probability of damage to the cold storage structure.

[0023] In some embodiments, there are multiple energy storage containers, and the thermal management module of the energy storage cabinet of each energy storage container is connected to the cold storage structure through a corresponding cold storage pipeline; the circulation pump is located outside the container, and each cold storage pipeline is connected to the circulation pump.

[0024] By adopting the above technical solution, when there are multiple energy storage containers, the multiple energy storage containers can share the cold storage structure, store the cooling medium into the cold storage structure through the corresponding cold storage pipeline, or have the cold storage structure provide the cooling medium through the corresponding cold storage pipeline.

[0025] In some embodiments, the energy storage device further includes a shielding structure mounted above the circulating pump.

[0026] By adopting the above technical solution and using the shielding structure to protect the circulating pump, the damage to the circulating pump caused by the external environment can be effectively reduced, and the service life of the circulating pump can be effectively improved.

[0027] In some embodiments, each housing is provided with a base at its bottom, and the cold storage structure includes multiple sub-cold storage modules, which are connected in series via connecting pipes; each sub-cold storage module is located below its corresponding housing, and in the direction of gravity, the projection of the sub-cold storage module is located within the range of its corresponding base.

[0028] By adopting the above technical solution, in the case of multiple energy storage containers, the cold storage structure can adopt multiple sub-cold storage modules connected in series. Each sub-cold storage module is set below the corresponding container and its projection is set within the range of the corresponding base, so that the weight of the energy storage container will not be applied to the sub-cold storage module, and the probability of the sub-cold storage module being damaged is low.

[0029] Secondly, embodiments of this application also provide an energy storage system, including a power conversion device and an energy storage device as described above, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0030] The beneficial effects of the embodiments of this application are as follows: The energy storage system provided in the embodiments of this application includes the above-mentioned energy storage device. When the above-mentioned energy storage device is running at high power and the thermal management module has a low load on the power grid, the operation of the energy storage system has a low load on the power grid.

[0031] Thirdly, embodiments of this application also provide a charging network, including charging piles and an energy storage device or energy storage system as described above, wherein the energy storage device is used to provide electrical energy to the charging piles.

[0032] The beneficial effects of the embodiments of this application are as follows: The charging network provided in the embodiments of this application includes the above-mentioned energy storage device or energy storage system, and the thermal management module of the charging network has a low load on the power grid. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of the energy storage device provided in the embodiments of this application, including multiple energy storage cabinets;

[0035] Figure 2 A schematic diagram of the pipeline connection for the parallel connection of the thermal management modules of multiple energy storage cabinets provided in the embodiments of this application;

[0036] Figure 3 A schematic diagram of the series-parallel piping connection of the thermal management modules of multiple energy storage cabinets provided in the embodiments of this application;

[0037] Figure 4 A schematic diagram of the structure of the energy storage device provided in the embodiments of this application includes an energy storage container;

[0038] Figure 5 A schematic diagram of another embodiment of the energy storage device provided in this application, including an energy storage container;

[0039] Figure 6 A schematic diagram showing the distribution of the base and cold storage module of the energy storage container in the direction of gravity, as provided in the embodiments of this application;

[0040] Figure 7 A schematic diagram of the structure of an energy storage device including multiple energy storage containers provided in the embodiments of this application;

[0041] Figure 8 A top view of an energy storage device comprising multiple energy storage containers, provided for embodiments of this application;

[0042] Figure 9 A schematic diagram showing the distribution of multiple bases and sub-cold storage modules in the direction of gravity when the energy storage device provided in the embodiments of this application includes multiple energy storage containers;

[0043] Figure 10 A schematic diagram of an energy storage system provided in an embodiment of this application;

[0044] Figure 11This is a schematic diagram of a charging network provided in an embodiment of this application.

[0045] The following are the labeling elements in the figure:

[0046] 1000. Energy storage devices;

[0047] 2000, Energy storage system; 2100, Power conversion device; 2200, Power generation device;

[0048] 3000, Charging network; 3100, Charging station; 3200, Connector;

[0049] 100. Energy storage cabinet; 110. Cabinet body; 120. Thermal management module;

[0050] 200. Cold storage structure; 201. Sub-cold storage module; 210. Cold storage pipeline; 211. Main cold storage pipeline; 212. Branch cold storage pipeline;

[0051] 300. Circulating pump;

[0052] 400. Energy storage container; 410. Container body; 420. Base;

[0053] G, direction of gravity. Detailed Implementation

[0054] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0055] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] Energy storage is a crucial equipment foundation and key supporting technology for building new power systems and promoting the green and low-carbon transformation of energy. As the proportion of renewable energy power generation and installed capacity in my country continues to increase, the "renewable energy + energy storage" model will play an increasingly important role in the regulation and security of the power system.

[0059] Energy storage devices are used as supplementary and backup systems for the power grid. In the event of grid fluctuations or power shortages, energy storage devices operate at high power to balance the grid load. However, energy storage devices generate a large amount of heat when operating at high power, thus requiring a certain degree of cooling.

[0060] The cooling effect of energy storage devices is mainly achieved through heat exchange via a cyclically supplied cooling medium provided by the thermal management module. However, the operation of the thermal management module is directly powered by the power grid, which further burdens the grid even when it is already under heavy load. Therefore, reducing the burden on the power grid from the thermal management module has become an urgent problem to be solved.

[0061] Based on the above considerations, in order to solve the problem that the thermal management module of the energy storage device in the relevant technology has a large burden on the power grid when operating at high power, an energy storage device is designed. In this device, the thermal management module of multiple energy storage cabinets can be connected to the cold storage structure. The cooling medium stored in the cold storage structure is supplied to the thermal management module by a circulating pump to reduce the cooling power of the thermal management module, thereby effectively reducing the burden on the power grid.

[0062] The energy storage devices disclosed in this application can be used, but are not limited to, in fixed or mobile energy stations, such as energy storage containers, energy storage distribution cabinets, energy storage power stations, and battery swapping stations.

[0063] The energy storage device provided in the embodiments of this application will now be described.

[0064] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery clusters may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0065] The battery device may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0066] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0067] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0068] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing.

[0069] As an example, the battery cell assembly can be a battery module, which can be housed in the housing by fixing the battery module in the housing.

[0070] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0071] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0072] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0073] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0074] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0075] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0076] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0077] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0078] As an example, the main control module can serve as the battery management unit for the battery cluster, used 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 instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0079] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0080] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0081] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0082] Please refer to Figure 1 This application provides an energy storage device 1000, including a cold storage structure 200, a circulation pump 300, and multiple energy storage cabinets 100. Each energy storage cabinet 100 includes a cabinet body 110 and a thermal management module 120 disposed within the cabinet body 110. The cold storage structure 200 is disposed outside the cabinet body 110 of the multiple energy storage cabinets 100. The cold storage structure 200 is connected to the thermal management module 120 through a cold storage pipeline 210. The circulation pump 300 is disposed on the cold storage pipeline 210.

[0083] The number of energy storage cabinets 100 can be any number of two, three, four or more; the thermal management modules 120 of multiple energy storage cabinets 100 can be connected to the cold storage structure 200 through cold storage pipelines 210.

[0084] The energy storage cabinet 100 includes a cabinet 110, which houses the battery pack and other components such as the thermal management module 120. The thermal management module 120 provides a cooling medium to the battery pack to achieve heat exchange and dissipation.

[0085] The thermal management module 120 is used to circulate and supply the cooling medium. In some embodiments, the thermal management module 120 includes a condenser, a compressor, a plate heat exchanger, etc.; the condenser, compressor, and plate heat exchanger are used to circulate and refrigerate the cooling medium. Alternatively, the thermal management module 120 may also include an electric heater, which can heat the cooling medium when the ambient temperature is low, thereby allowing the heated cooling medium to be used to heat the battery device to ensure the operating temperature of the battery device. In some embodiments, the thermal management module 120 may also include a valve structure, such as a three-way valve, a four-way valve, or other multi-way valve, which is used to connect the cold storage pipeline 210, and the introduction or export of the cooling medium is controlled by controlling the opening and closing of the valve structure.

[0086] The cold storage structure 200 is used to store the cooling medium output by the thermal management module 120. The cold storage structure 200 can be, but is not limited to, a cold storage tank, a cold storage barrel, a cold storage box, or other containers with heat preservation functions. The cold storage structure 200 can store the cooling medium, and when the energy storage cabinet 100 is operating at high power, the cold storage structure 200 can output the stored cooling medium for cooling, thereby effectively reducing the cooling power demand of the thermal management module 120 and thus reducing the load of the thermal management module 120 on the power grid.

[0087] The cold storage structure 200 can be installed outside the cabinet 110 of multiple energy storage cabinets 100; optionally, the cold storage structure 200 can be installed on the periphery of the cabinet 110, such as the front, rear, or side of the cabinet 110; or, the cold storage structure 200 can be installed on the top of multiple cabinets 110, with the multiple cabinets 110 jointly supporting the installation of the cold storage structure 200; or, the cold storage structure 200 can also be installed below multiple cabinets 110, for example, buried in the ground below multiple cabinets 110.

[0088] The circulating pump 300 is used to provide power to the cooling medium in the cold storage structure 200 so that the cooling medium stored in the cold storage structure 200 can be smoothly introduced into the thermal management module 120 of the energy storage cabinet 100.

[0089] The energy storage device 1000 provided in this application embodiment has a cold storage structure 200 connected to the thermal management modules 120 of multiple energy storage cabinets 100 via a cold storage pipeline 210. When the energy storage cabinets 100 are operating at low heat generation, the thermal management modules 120 can operate at low power to cool and introduce a cooling medium into the cold storage structure 200, so that the cold storage structure 200 can store cold energy. When the energy storage cabinets 100 operate at high power due to grid fluctuations or power shortages, the cooling medium stored in the cold storage structure 200 can be introduced into the thermal management modules 120 through the action of the circulation pump 300 to reduce the cooling power demand of the thermal management modules 120, thereby effectively reducing the burden of the thermal management modules 120 on the grid.

[0090] Please refer to Figure 1 and Figure 2 In some embodiments, the thermal management modules 120 are arranged in parallel on the cold storage pipeline 210.

[0091] In this embodiment, the thermal management modules 120 of each energy storage cabinet 100 can be connected to the cold storage structure 200 through the cold storage pipeline 210, so that the thermal management modules 120 do not affect each other.

[0092] For example, in some embodiments, the cold storage pipeline 210 may include a main cold storage pipeline 211 and a plurality of cold storage branch pipelines 212 connected to the main cold storage pipeline 211. The plurality of cold storage branch pipelines 212 are arranged in parallel, and the thermal management modules 120 of the plurality of energy storage cabinets 100 are respectively connected to the corresponding cold storage branch pipelines 212; at the same time, a circulation pump 300 may be installed on the main cold storage pipeline 211 and used to provide power to the cooling medium to achieve circulation; such as Figure 2 As shown.

[0093] With this configuration, the cold storage structure 200 can provide cooling medium to each thermal management module 120 through the circulating pump 300 and the cold storage pipeline 210, resulting in low interference between the thermal management modules 120.

[0094] Please refer to Figure 1 and Figure 3 In some embodiments, at least two of the energy storage cabinets 100 have their thermal management modules 120 connected in series, and the two thermal management modules 120 connected in series are connected in parallel with the thermal management modules 120 of the other energy storage cabinets 100.

[0095] For example, in some embodiments, the number of energy storage cabinets 100 can be four. The thermal management modules 120 of the first energy storage cabinet 100 and the thermal management modules 120 of the second energy storage cabinet 100 are connected in series, and the thermal management modules 120 of the third energy storage cabinet 100 and the thermal management modules 120 of the fourth energy storage cabinet 100 are connected in series. At the same time, the thermal management modules 120 of the first energy storage cabinet 100 and the thermal management modules 120 of the second energy storage cabinet 100 are connected in parallel with the thermal management modules 120 of the third energy storage cabinet 100 and the thermal management modules 120 of the fourth energy storage cabinet 100.

[0096] Alternatively, in other embodiments, still taking four energy storage cabinets 100 as an example, the thermal management modules 120 of the first and second energy storage cabinets 100 are connected in series, and the thermal management modules 120 of the first and second energy storage cabinets 100 are connected in parallel with the thermal management modules 120 of the second and third energy storage cabinets 100; such as Figure 3 As shown.

[0097] With this configuration, the cold storage structure 200 can provide cooling medium to one or more thermal management modules 120 connected in parallel via the circulation pump 300 and the cold storage pipeline 210.

[0098] It should be understood that in some embodiments, the thermal management modules 120 of the multiple energy storage cabinets 100 may also be connected in series.

[0099] Please refer to Figure 1 and Figure 4 In some embodiments, a normally closed connector (not shown in the figure) is provided on the cold storage pipeline 210, which is located between the circulating pump 300 and the thermal management module 120.

[0100] A normally closed joint refers to a valve that allows fluid to flow in only one direction. Optionally, a normally closed joint includes, but is not limited to, a check valve or a one-way valve.

[0101] The normally closed connector is located between the circulating pump 300 and the thermal management module 120. Therefore, the normally closed connector can restrict the unidirectional flow of the cooling medium from the circulating pump 300 to the thermal management module 120, and can effectively prevent the cooling medium from flowing back to the circulating pump 300.

[0102] This configuration prevents the cooling medium from flowing back when the circulating pump 300 stops running, while also maintaining stable pressure within the cold storage pipeline 210.

[0103] Please refer to Figure 4 and Figure 5In some embodiments, the energy storage device 1000 further includes an energy storage container 400, which includes a container body 410 and a plurality of energy storage cabinets 100 disposed within the container body 410. The cold storage structure 200 is externally disposed within the container body 410. The circulation pump 300 is externally disposed within the container body 410, or the circulation pump 300 is disposed inside the energy storage container 400.

[0104] The energy storage container 400 includes a container body 410 and energy storage cabinets 100; wherein, two, three, four or more energy storage cabinets 100 can be installed inside the container body 410. Optionally, the energy storage cabinets 100 can be installed inside the container body 410, or the energy storage cabinets 100 can be integrated into the container body 410, that is, part of the structure of the container body 410 can be used as the cabinet 110 of the energy storage cabinets 100.

[0105] The cold storage structure 200 is externally located within the housing 410. Optionally, the cold storage structure 200 can be installed on top of the housing 410, thus the cooling medium stored within the cold storage structure 200 possesses a certain gravitational potential energy, effectively reducing the load on the circulating pump 300 used to drive the cooling medium. Alternatively, the cold storage structure 200 can be located around the perimeter of the housing 410, such as on the front, rear, or side of the housing 410 during operation. Alternatively, the cold storage structure 200 can be located at the bottom of the housing 410, such as buried in the ground beneath the housing 410; in this way, the housing 410 can shield the cold storage structure 200 from direct sunlight, and the insulation effect of the cold storage structure 200 buried in the ground is better, thereby slowing down the dissipation rate of the cooling medium within the cold storage structure 200.

[0106] The circulation pump 300 can be externally mounted on the housing 410, for example, on the periphery of the housing 410, which can reduce the impact of the circulation pump 300 on the internal space of the housing 410. Alternatively, the circulation pump 300 can also be installed inside the housing 410, in which case the housing 410 can provide protection for the circulation pump 300 and effectively extend its service life.

[0107] With this configuration, the cold storage structure 200 can be externally placed in the housing 410 and connected to the thermal management modules 120 of multiple energy storage cabinets 100 inside the housing 410 via the circulation pump 300 and the cold storage pipeline 210.

[0108] Please refer to Figure 5 In some embodiments, the cold storage structure 200 is disposed on the top of the housing 410.

[0109] In this embodiment, the cold storage structure 200 can be installed on the top of the housing 410, for example, by fixing the cold storage structure 200 and the housing 410 with fasteners.

[0110] It should be understood that the cold storage structure 200 is higher than the thermal management module 120 inside the housing 410, and thus the cold storage structure 200 has a certain gravitational potential energy, thereby reducing the power requirements of the circulating pump 300.

[0111] Meanwhile, since the cold storage structure 200 is exposed to the external environment, it is susceptible to direct sunlight. Therefore, a light-reflecting layer can be provided on the cold storage structure 200 to reduce the impact of direct sunlight on it, thereby reducing the rate at which the cold energy stored inside the cold storage structure 200 dissipates. In some embodiments, a heat insulation layer can also be provided on the cold storage structure 200 to improve its cold storage capacity.

[0112] Please refer to Figure 4 In some embodiments, the cold storage structure 200 is embedded in the ground below the housing 410.

[0113] Optionally, the cold storage structure 200 can be embedded directly below the housing 410, meaning that in the direction of gravity, the projection of the cold storage structure 200 is within the area of ​​the housing 410. Alternatively, the cold storage structure 200 can be embedded to the lower side of the housing 410, meaning that in the direction of gravity, the projection of the cold storage structure 200 is outside the area of ​​the housing 410. Or, in the direction of gravity, the projection of the cold storage structure 200 partially coincides with the projection of the housing 410.

[0114] In some embodiments, the surface of the cold storage structure 200 is provided with a corrosion-resistant layer to reduce the probability of corrosion of the cold storage structure 200 and improve the service life of the cold storage structure 200.

[0115] With this configuration, the insulation effect of the cold storage structure 200 buried in the ground is better, and the loss of cooling medium stored in the cold storage structure 200 is smaller.

[0116] Please refer to Figures 4 to 6 In some embodiments, a base 420 is also provided at the bottom of the housing 410, and the projection of the cold storage structure 200 is located within the range of the base 420 in the direction of gravity G.

[0117] The base 420 supports the container 410 to improve the stability of the entire energy storage container 400. The base 420 can be fixedly connected to the container 410 by fasteners (such as bolts). Exemplarily, in some embodiments, the base 420 can be a ring-shaped structure, such as a rectangular ring-shaped support structure; the base 420 is used to support the outer periphery of the bottom of the container 410 to improve the stability of the energy storage container 400.

[0118] In some implementations, the base 420 can be pre-buried underground, so that the base 420 can evenly distribute the load and transfer the weight of the energy storage container 400 to the underground soil, avoiding foundation settlement caused by concentrated load.

[0119] In the direction of gravity G, the projection of the cold storage structure 200 lies within the area of ​​the base 420. For example, when the base 420 is a rectangular ring structure, in the direction of gravity G, the cold storage structure 200 is located inside the rectangular ring structure and does not coincide with it. Thus, when the base 420 is subjected to the gravity of the energy storage container 400 and transmitted downwards along the direction of gravity G, the downward force of the base 420 will not be applied to the cold storage structure 200. Consequently, the probability of the cold storage structure 200 being damaged due to excessive pressure is low.

[0120] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, there are multiple energy storage containers 400, and the thermal management module 120 of the energy storage cabinet 100 of each energy storage container 400 is connected to the cold storage structure 200 through the corresponding cold storage pipeline 210; the circulation pump 300 is set outside the container 410, and each cold storage pipeline 210 is connected to the circulation pump 300.

[0121] In this embodiment, the number of energy storage containers 400 can be any number of two, three, four, or more. Multiple energy storage containers 400 can be used to construct an energy storage power station.

[0122] Each energy storage container 400 can be connected to the cold storage structure 200 through a cold storage pipe 210, so that the thermal management module 120 of the energy storage cabinet 100 in the same energy storage container 400 can be connected to the cold storage structure 200 through a corresponding cold storage pipe 210.

[0123] The circulating pump 300 can simultaneously provide power to the cooling medium in multiple cold storage pipelines 210, so that the cooling medium can be smoothly introduced into each energy storage container 400 through each cold storage pipeline 210.

[0124] For example, in some embodiments, the number of energy storage containers 400 can be four, and the four energy storage containers 400 can be arranged in an array distribution of two rows and two columns; the cold storage structure 200 can be buried in the ground at the center of the four energy storage containers 400 to facilitate the wiring and installation of the cold storage pipelines 210 between the four energy storage containers 400 and the cold storage structure 200; the circulating pump 300 can also be set at the center of the four energy storage containers 400 to facilitate the connection of the cold storage pipelines 210.

[0125] With this configuration, when there are multiple energy storage containers 400, the multiple energy storage containers 400 can share the cold storage structure 200, store the cooling medium into the cold storage structure 200 through the corresponding cold storage pipeline 210, or have the cold storage structure 200 provide the cooling medium through the corresponding cold storage pipeline 210.

[0126] Please refer to Figure 7 and Figure 8 In some embodiments, the energy storage device 1000 also includes a shielding structure (not shown) mounted above the circulation pump 300.

[0127] The shielding structure is used to shield the circulating pump 300 to reduce the impact of direct sunlight, rain, dust, etc. on the lifespan of the circulating pump 300.

[0128] Optionally, the shielding structure includes, but is not limited to, top shielding structures such as iron sheds, canopies, and protective covers, or enclosed shielding structures.

[0129] This design, using a shielding structure to protect the circulating pump 300, effectively reduces damage to the circulating pump 300 from the external environment and effectively extends the service life of the circulating pump 300.

[0130] Please refer to Figures 7 to 9 In some embodiments, each housing 410 has a base 420 at its bottom. The cold storage structure 200 includes multiple sub-cold storage modules 201, which are connected in series via connecting pipes. Each sub-cold storage module 201 is located below its corresponding housing 410. In the direction of gravity G, the projection of the sub-cold storage module 201 is within the range of its corresponding base 420.

[0131] The sub-cold storage module 201 includes, but is not limited to, structures with storage and insulation functions such as cold storage boxes, cold storage tanks, and cold storage barrels. Multiple sub-cold storage modules 201 are connected in series through connecting pipelines to jointly store or provide cooling media.

[0132] It should be understood that when there are multiple energy storage containers 400, in order to reduce the probability that the weight of the energy storage container 400 may act on the cold storage structure 200 and damage it when the cold storage structure 200 is buried in the ground, multiple sub-cold storage modules 201 can be connected in series to form the cold storage structure 200. Each cold storage structure 200 is then buried under the corresponding energy storage container 400, and the projection of each sub-cold storage module 201 is located within the range of the corresponding base 420. As a result, each sub-cold storage module 201 does not overlap with the corresponding base 420 in the direction of gravity G. The downward force exerted by the energy storage container 400 through the base 420 will not be transmitted to the sub-cold storage module 201, or will not be completely transmitted to the sub-cold storage module 201. The probability of the sub-cold storage module 201 being damaged due to the weight of the energy storage container 400 is effectively reduced.

[0133] The energy storage device 1000 provided in this application will now be further described according to specific embodiments.

[0134] Please refer to Figure 4 , Figure 7 and Figure 8 In this embodiment, the energy storage device 1000 includes an energy storage container 400, a cold storage structure 200, and a circulation pump 300. The energy storage container 400 includes a housing 410 and four energy storage cabinets 100 disposed within the housing 410. Each energy storage cabinet 100 includes a thermal management module 120. The thermal management modules 120 of the four energy storage cabinets 100 are respectively connected to the cold storage structure 200 via cold storage pipelines 210, i.e., the four thermal management modules 120 are connected in parallel. The circulation pump 300 is installed on the cold storage pipelines 210 to provide power to the cold storage structure 200 and the cooling medium within the cold storage pipelines 210, so that the cooling medium can be smoothly introduced from the cold storage structure 200 into the corresponding thermal management module 120. The cold storage structure 200 can be buried in the ground below the energy storage container 400.

[0135] Optionally, multiple energy storage containers 400 can constitute an energy storage power station. Taking four energy storage containers 400 as an example, the four energy storage containers 400 can be arranged in a two-row, two-column array; the cold storage structure 200 can be buried in the ground in the middle of the four energy storage containers 400, and the circulation pump 300 can be located in the middle of the four energy storage containers 400 to facilitate the routing of the cold storage pipeline 210. The four energy storage containers 400 can be connected to the cold storage structure 200 through corresponding cold storage pipelines 210, and all four cold storage pipelines 210 are connected to the circulation pump 300 in the middle, so that the thermal management modules 120 of the energy storage cabinets 100 in the four energy storage containers 400 can share the cold storage structure 200 to achieve auxiliary cooling regulation.

[0136] Please refer to Figure 4 and Figure 10 Secondly, embodiments of this application also provide an energy storage system 2000, including a power conversion device 2100 and an energy storage device 1000 as described above, wherein the power conversion device 2100 is used to electrically connect the power generation device 2200 and the energy storage device 1000.

[0137] In some embodiments, the energy storage system 2000 may include one or more energy storage devices 1000 and a power conversion device 2100, wherein the power conversion device 2100 is connected between the power generation device 2200 and the energy storage device 1000. The power generation device 2200 generates electrical energy, which can be stored in the energy storage device 1000 via the power conversion device 2100. As an example, the power generation device 2200 may specifically be a solar panel, a hydroelectric power generation device 2200, a thermal power generation device 2200, a wind power generation device 2200, etc. The specific type of the power generation device 2200 is not limited in this application.

[0138] The energy storage system 2000 provided in this application embodiment includes the aforementioned energy storage device 1000. When the energy storage device 1000 operates at high power, the thermal management module 120 has a low load on the power grid (i.e., the power generation device 2200 in this embodiment), and the operation of the energy storage system 2000 has a low load on the power grid.

[0139] Please refer to Figure 4 , Figure 10 and Figure 11 Thirdly, embodiments of this application also provide a charging network 3000, including a charging pile 3100 and an energy storage device 1000 or an energy storage system 2000 as described above, wherein the energy storage device 1000 is used to provide electrical energy to the charging pile 3100.

[0140] This application provides a charging network 3000, including a charging pile 3100 and an energy storage device 1000. The charging pile 3100 is electrically connected to the energy storage device 1000, which provides electrical energy to the charging pile 3100. The charging pile 3100 is electrically connected to a battery device in the energy storage device 1000 via a cable, and the battery device can provide its stored electrical energy to the charging pile 3100. The charging pile 3100 has one or more connectors 3110 for connecting to an electrical device (such as a vehicle), thereby enabling it to replenish energy.

[0141] The energy storage device 1000 can be located inside the charging pile 3100 (e.g., an integrated energy storage and charging unit) or outside the charging pile 3100.

[0142] The charging network 3000 provided in this application embodiment includes the above-mentioned energy storage device 1000 or energy storage system 2000, and the thermal management module 120 of the charging network 3000 has a low load on the power grid.

[0143] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized in that: include Multiple energy storage cabinets, each energy storage cabinet including a cabinet body and a thermal management module disposed within the cabinet body; A cold storage structure, wherein the cold storage structure is disposed outside the cabinet of the plurality of energy storage cabinets, and the cold storage structure is connected to the thermal management module via cold storage pipelines; and A circulating pump is installed on the cold storage pipeline.

2. The energy storage device according to claim 1, characterized in that: The thermal management modules are arranged in parallel on the cold storage pipeline.

3. The energy storage device according to claim 1, characterized in that: The thermal management modules of at least two of the multiple energy storage cabinets are connected in series, and the two thermal management modules connected in series are connected in parallel with the thermal management modules of the other energy storage cabinets.

4. The energy storage device according to claim 1, characterized in that: The cold storage pipeline is equipped with a normally closed joint, which is located between the circulating pump and the thermal management module.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: The energy storage device also includes an energy storage container, which includes a container body and a plurality of energy storage cabinets disposed within the container body. The cold storage structure is external to the container body. The circulation pump is external to the container body, or the circulation pump is disposed inside the energy storage container.

6. The energy storage device according to claim 5, characterized in that: The cold storage structure is located on the top of the enclosure.

7. The energy storage device according to claim 5, characterized in that: The cold storage structure is buried in the ground below the box.

8. The energy storage device according to claim 7, characterized in that: The bottom of the enclosure is also provided with a base, and in the direction of gravity, the projection of the cold storage structure is located within the range of the base.

9. The energy storage device according to claim 8, characterized in that: The energy storage containers are multiple in number, and the thermal management module of the energy storage cabinet of each energy storage container is connected to the cold storage structure through the corresponding cold storage pipeline; the circulation pump is located outside the container, and each cold storage pipeline is connected to the circulation pump.

10. The energy storage device according to claim 9, characterized in that: The energy storage device also includes a shielding structure, which is mounted above the circulating pump.

11. The energy storage device according to claim 9, characterized in that: Each of the aforementioned housings is provided with a base at its bottom. The cold storage structure includes multiple sub-cold storage modules, which are connected in series via connecting pipes. Each sub-cold storage module is located below its corresponding housing, and in the direction of gravity, the projection of the sub-cold storage module is within the range of its corresponding base.

12. An energy storage system, characterized in that: It includes a power conversion device and an energy storage device as described in any one of claims 1 to 11, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

13. A charging network, characterized in that: It includes a charging pile and an energy storage device as described in any one of claims 1 to 11 or an energy storage system as described in claim 12, wherein the energy storage device is used to provide electrical energy to the charging pile.

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