Energy storage device, energy storage system and charging network

Abstract

The utility model relates to the technical field of energy storage devices, and provides an energy storage device, an energy storage system and a charging network, the energy storage device comprises a heat management module and a plurality of battery devices, the plurality of battery devices are stacked to form at least two battery assemblies, and the heat management module comprises a heat management unit, a first pipeline, a second pipeline and a reversing device. A first port and a second port of the reversing device are respectively connected with a liquid outlet end and a liquid return end of the heat management unit, a third port and a fourth port of the reversing device are respectively connected with a first pipeline and a second pipeline, and a part of the first pipeline is positioned between two adjacent battery assemblies and is simultaneously connected with adjacent heat exchange components; and / or a part of the second pipeline is positioned between two adjacent battery assemblies and is connected with the adjacent heat exchange parts at the same time; according to the energy storage device provided by the embodiment of the invention, the use amount of the pipelines can be effectively reduced, and the first pipeline and / or the second pipeline can use a larger pipe diameter to reduce the flow resistance, so that the purpose of reducing the cost can be achieved.

Description

Technical Field

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

[0002] New energy batteries are increasingly widely used in life and industries. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the energy storage field and so on.

[0003] The energy storage device is used as a supplement and backup system for the power grid. The battery device inside the energy storage device may generate more heat during operation; therefore, it is necessary to use a thermal management unit to supply a heat exchange medium to the heat exchange components of the battery device through a cooling pipeline to achieve temperature reduction.

[0004] In the related art, the layout method of the cooling pipeline is relatively complicated, that is, the pipeline routing design is carried out separately for the heat exchange components of the battery devices in each group of battery modules, resulting in more materials used for the cooling pipeline, and thus increasing the overall cost of the energy storage device. Summary of the Utility Model

[0005] The purpose of the embodiments of this application is to provide an energy storage device, an energy storage system, and a charging network, aiming to solve the problem of the relatively high overall cost of the energy storage device in the related art.

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

[0007] In a first aspect, the embodiments of this application provide an energy storage device, including a thermal management module and a plurality of battery devices. Each battery device includes a heat exchange component, and the plurality of battery devices are stacked to form at least two groups of battery modules; the thermal management module includes a thermal management unit, a first pipeline, a second pipeline, and a commutation device. The commutation device has a first port, a second port, a third port, and a fourth port. The first port is connected to the liquid outlet end of the thermal management unit, the second port is connected to the liquid return end of the thermal management unit, the third port is connected to the first pipeline, and the fourth port is connected to the second pipeline; the commutation device is configured to be able to conduct the first port and the third port and conduct the second port and the fourth port, and the commutation device is configured to be able to switch to conduct the first port and the fourth port and conduct the second port and the third port; the first pipeline is connected to each heat exchange component, and the second pipeline is connected to each heat exchange component; wherein, a part of the first pipeline is located between adjacent two groups of battery modules and simultaneously connects the adjacent heat exchange components; and / or, a part of the second pipeline is located between adjacent two groups of battery modules and simultaneously connects the adjacent heat exchange components.

[0008] Advantages of the embodiments of the present application: For the energy storage device provided by the embodiments of the present application, the part of the first pipeline for connecting the heat management unit and each heat exchange component can be arranged between two adjacent battery modules, and / or, the part of the second pipeline for connecting the heat management unit and each heat exchange component can be arranged between two adjacent battery modules, so that the part of the first pipeline and / or the part of the second pipeline can be between two adjacent battery modules and simultaneously connect the adjacent heat exchange components. Compared with the design of independently connecting the pipelines of the heat exchange components in each battery module, the connection method of the first pipeline and / or the second pipeline connecting the heat exchange components in two adjacent battery modules can effectively reduce the amount of pipelines, thereby reducing the cost of the pipelines, so as to achieve the purpose of reducing the overall cost of the energy storage device; moreover, the commutation device can switch to conduct the first port and the third port and conduct the second port and the fourth port, so that the heat management unit can introduce the heat exchange medium into each heat exchange component through the first pipeline, or switch to conduct the first port and the fourth port and conduct the second port and the third port, so that the heat management unit can introduce the heat exchange medium into each heat exchange component through the second pipeline. Thus, the heat exchange and cooling effect on the battery device can be improved.

[0009] In some embodiments, the first pipeline includes a first main pipeline, a first branch pipeline, and a first sub-branch pipeline. The first main pipeline is connected to the third port, and the first branch pipeline is connected to the first main pipeline; a plurality of first sub-branch pipelines are arranged on the first branch pipeline, and the first branch pipeline is correspondingly connected to a plurality of heat exchange components through the plurality of first sub-branch pipelines;

[0010] The second pipeline includes a second main pipeline, a second branch pipeline, and a second sub-branch pipeline. The second main pipeline is connected to the fourth port, the second branch pipeline is connected to the second main pipeline, a plurality of second sub-branch pipelines are arranged on the second branch pipeline, and the second branch pipeline is correspondingly connected to a plurality of heat exchange components through the plurality of second sub-branch pipelines;

[0011] At least one first branch pipeline is located between two adjacent battery modules and is connected to the adjacent heat exchange components through a plurality of first sub-branch pipelines; and / or, at least one second branch pipeline is located between two adjacent battery modules and is connected to the adjacent heat exchange components through a plurality of second sub-branch pipelines.

[0012] By adopting the above technical solution, at least one first branch pipeline is arranged between two adjacent battery modules, and the first branch pipeline is connected to the adjacent heat exchange components in two adjacent battery modules through a plurality of first sub-branch pipelines, so that the layout of the first branch pipeline can be optimized and the overall amount of the first pipeline can be reduced; and / or, at least one second branch pipeline is arranged between two adjacent battery modules, and the second branch pipeline is connected to the adjacent heat exchange components in two adjacent battery modules through a plurality of second sub-branch pipelines, so that the layout of the second branch pipeline can be optimized and the overall amount of the second pipeline can be reduced; thus, the overall cost of the energy storage device can be reduced.

[0013] In some embodiments, in the arrangement direction of the battery modules, a first sub-pipeline and a second sub-pipeline are respectively arranged on opposite sides of at least one group of battery modules; the first sub-pipeline is correspondingly connected to adjacent heat exchange components through a plurality of first branch pipelines, and the second sub-pipeline is correspondingly connected to adjacent heat exchange components through a plurality of second branch pipelines.

[0014] By adopting the above technical solution, by respectively arranging a first sub-pipeline and a second sub-pipeline on opposite sides of at least one group of battery modules, connecting the first sub-pipeline to adjacent heat exchange components through the first branch pipelines, and connecting the second sub-pipeline to adjacent heat exchange components through the second branch pipelines, the layout of the first sub-pipeline and the second sub-pipeline is further optimized, the layout space of the pipelines is saved in the arrangement direction of the battery modules, and the energy density of the energy storage device is improved.

[0015] In some embodiments, in the arrangement direction of the battery modules, a first sub-pipeline and a second sub-pipeline are respectively arranged on opposite sides of each group of battery modules.

[0016] By adopting the above technical solution, the layout of the first sub-pipeline and the second sub-pipeline can be further optimized, the layout space of the pipelines is saved in the arrangement direction of the battery modules, and the energy density of the energy storage device is improved.

[0017] In some embodiments, the commutation device is a commutation valve.

[0018] By adopting the above technical solution, the liquid outlet end, the liquid return end, the first pipeline and the second pipeline are respectively connected by using the commutation valve, so that the connection between the liquid outlet end and the first pipeline and the second pipeline can be switched by controlling the commutation valve, and the connection between the liquid return end and the first pipeline and the second pipeline can be switched.

[0019] In some embodiments, the heat management unit is of a vertical structure. In the arrangement direction of the battery modules, the heat management unit is arranged on the outermost side of multiple groups of battery modules; in the gravity direction, the liquid outlet end and the liquid return end of the heat management unit are located at the bottom side of the heat management unit.

[0020] By adopting the above technical solution, the heat management unit can adopt a vertical structure, and the battery modules and the heat management unit can be arranged separately, that is, the heat management unit is arranged on the outermost side of multiple groups of battery modules, so that the influence of the heat management unit on the pipeline layout between the heat exchange components inside the battery modules can be reduced; and the heat management unit can perform pipe connection operations on the liquid outlet end and the liquid return end at the bottom side, so that the space required for the pipe connection operations of the liquid outlet end and the liquid return end can be reduced, the space influence in the arrangement direction of the battery modules can be reduced, and the overall space utilization rate can be improved.

[0021] In some embodiments, the thermal management unit has a horizontal structure and is located at any position of the battery assembly in the gravity direction; in the arrangement direction of the battery assembly, the liquid outlet end and the liquid return end of the thermal management unit are located on any side of the thermal management unit.

[0022] By adopting the above technical solution, the thermal management unit can have a horizontal structure, and the thermal management unit can be arranged at any position of the battery assembly in the gravity direction to achieve the stacked arrangement of the thermal management unit and multiple groups of battery assemblies; and the thermal management unit can perform pipe connection operations on the liquid outlet end and the liquid return end on any side in the arrangement direction of the battery assembly, so that the space required for the pipe connection operations of the liquid outlet end and the liquid return end can be reduced from affecting the space in the gravity direction, and the overall space utilization rate can be improved.

[0023] In some embodiments, in the gravity direction, the thermal management unit is located on the top side of multiple groups of battery assemblies.

[0024] By adopting the above technical solution, the battery assembly and the thermal management unit can be separately arranged, that is, the thermal management unit is arranged on the topmost side of multiple groups of battery assemblies, so that the influence of the thermal management unit on the pipeline layout between the heat exchange components inside the battery assembly can be reduced, and the thermal management unit on the top side can shield the battery assembly to reduce the temperature influence of direct sunlight on the battery device on the top layer of the battery assembly.

[0025] In some embodiments, in the gravity direction, the thermal management unit is located in the middle of the battery assembly.

[0026] By adopting the above technical solution, the thermal management unit can be arranged in the middle of multiple groups of battery assemblies to facilitate the thermal management unit to connect the first pipeline and the second pipeline to the upper half and the lower half of the battery assembly respectively.

[0027] In a second aspect, an embodiment of the present application further provides an energy storage system, including a power conversion device and the energy storage device as described above, and the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0028] Beneficial effects of the embodiment of the present application: The energy storage system provided by the embodiment of the present application includes the above-mentioned energy storage device, and on the basis that the cost of the above-mentioned energy storage device is relatively low, the cost of the energy storage system can be effectively reduced.

[0029] In a third aspect, an embodiment of the present application further provides a charging network, including a charging pile and the energy storage device or the energy storage system as described above, and the energy storage device is used to provide electric energy for the charging pile.

[0030] Beneficial effects of the embodiment of the present application: The charging network provided by the embodiment of the present application includes the above-mentioned energy storage device or the above-mentioned energy storage system, and thus, the cost of the charging network can be effectively reduced. Brief Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of one of the energy storage devices provided by some embodiments of the present application;

[0033] Figure 2 It is a schematic structural diagram of one of the energy storage devices provided by some embodiments of the present application;

[0034] Figure 3 It is a schematic structural diagram of one of the energy storage devices provided by some embodiments of the present application;

[0035] Figure 4 It is a schematic diagram of an energy storage system provided by some embodiments of the present application;

[0036] Figure 5 It is a schematic diagram of a charging network provided by some embodiments of the present application.

[0037] Among them, the reference numerals in the drawings are as follows:

[0038] 1000, energy storage device; 1100, battery assembly; 2000, energy storage system; 2100, power conversion device; 2200, power generation device; 3000, charging network; 3100, charging pile; 3110, connector;

[0039] 100, battery device; 110, heat exchange component;

[0040] 200, thermal management module; 210, thermal management unit; 220, first pipeline; 221, first main pipeline; 222, first branch pipeline; 223, first branch line; 230, second pipeline; 231, second main pipeline; 232, second branch pipeline; 233, second branch line; 240, commutation device; 240a, commutation valve; 241, first port; 242, second port; 243, third port; 244, fourth port;

[0041] L, arrangement direction; G, gravity direction. Detailed Embodiments

[0042] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 are intended to explain the present application and should not be construed as limiting the present application.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing 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, and thus should not be construed as limiting the present application.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "plurality" is two or more unless otherwise specifically defined.

[0045] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may 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 present application can be understood according to specific circumstances.

[0046] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used; in addition, batteries are also increasingly used in the energy storage field, such as energy storage devices. An energy storage device is a device for storing electric energy, inside which a battery device is placed. It has the characteristics of being convenient for installation and transportation, high integration, small floor area, and good expandability, and is an important part of the development of distributed energy, smart grid, and energy Internet in the energy storage field. With the rapid development of new energy technology, energy storage devices have become one of the more important research directions in the new energy field.

[0047] Energy storage devices are used as supplementary and backup systems for power grids. During operation, the battery devices inside the energy storage devices may generate a large amount of heat. Therefore, it is necessary to use a thermal management unit to supply a heat exchange medium to the heat exchange components of the battery devices through cooling pipelines to achieve temperature reduction. In related technologies, the layout method of the cooling pipelines is relatively complicated, that is, the pipeline routing design is separately carried out for the heat exchange components of the battery devices in each group of battery modules, resulting in a large amount of materials used for the cooling pipelines, and further increasing the overall cost of the energy storage device.

[0048] Based on the above considerations, in order to solve the problem of the relatively high overall cost of the energy storage device in related technologies, an energy storage device is designed. The energy storage device uses a thermal management unit to circulate and introduce a heat exchange medium to the heat exchange components of the battery device through a first pipeline and a second pipeline to achieve heat exchange and temperature reduction. At the same time, a commutation device is used to switch the first pipeline or the second pipeline to form a conduction with the liquid outlet end of the thermal management unit to improve the heat exchange effect. Among them, a part of the first pipeline is arranged between adjacent two groups of battery modules and simultaneously connected to the adjacent heat exchange components, and / or a part of the second pipeline is arranged between adjacent two groups of battery modules and simultaneously connected to the adjacent heat exchange components; through the first pipeline and / or the second pipeline, the adjacent heat exchange components in adjacent two groups of battery modules can be simultaneously connected, so that the amount of the first pipeline and / or the second pipeline can be effectively reduced; at the same time, a part of the first pipeline and / or the second pipeline is arranged between adjacent two groups of battery modules and simultaneously connected to the adjacent heat exchange components, that is, the first pipeline and / or the second pipeline has a larger installation space, and the first pipeline and / or the second pipeline can use a larger pipe diameter, so as to reduce the flow resistance of the first pipeline and / or the second pipeline, and reduce the power consumption required for the thermal management unit to pump the heat exchange medium under the condition that the total flow rate of the heat exchange medium is certain, so as to achieve the purpose of reducing the overall cost of the energy storage device.

[0049] The energy storage device disclosed in the embodiments of the present application can be but is not limited to being used in fixed or mobile energy stations, such as energy storage containers, energy storage distribution cabinets, energy storage power stations, battery swapping stations, etc.

[0050] Next, the energy storage device provided by the embodiments of the present application will be introduced and described.

[0051] Please refer to Figure 1 , the embodiments of the present application provide an energy storage device 1000, including one or more battery modules 1100 to increase the voltage and capacity of the energy storage device 1000. The battery module 1100 may include a plurality of battery devices 100, and the plurality of battery devices 100 are electrically connected through a busbar component to increase the voltage of the energy storage device 1000. When the energy storage device 1000 includes a plurality of battery modules 1100, the plurality of battery modules 1100 are connected in parallel to increase the capacity of the energy storage device 1000.

[0052] Among them, the battery device 100 may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0053] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0054] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0055] In some embodiments, the battery device 100 may be a battery pack, and the battery pack includes a housing and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the housing.

[0056] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the housing by fixing the battery module in the housing.

[0057] As an example, the battery cell assembly may also be accommodated in the housing by directly fixing a plurality of battery cells to the housing.

[0058] In the embodiments of the present application, the battery cell may be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material by charging after discharging the battery cell and can continue to be used.

[0059] The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0060] The energy storage device 1000 can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device 1000 can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device 1000 can store electrical energy during the low electricity consumption period, and during the high electricity consumption period, provide electrical energy for relevant users or electrical equipment. 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 1000.

[0061] In some embodiments, the energy storage device 1000 is an energy storage container or an energy storage cabinet.

[0062] In some embodiments, the energy storage device 1000 may include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0063] In some embodiments, the energy storage device 1000 may include modules such as a thermal management module, a master control module, a general control module, a power distribution module, and a fire protection module.

[0064] As an example, the thermal management module may include a liquid cooling unit, and the liquid cooling unit provides coolant for regulating the temperature of battery cells to each battery device 100 through pipelines.

[0065] As an example, the master control module may serve as the battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module may 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 modules such as an auxiliary battery management unit SBMU (Slave Battery Management Unit), and a fusion switch.

[0066] As an example, the general control module may serve as the battery management unit of the energy storage device 1000 for monitoring and managing the energy storage device 1000. The general control module may monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 1000. For example, it can control the charge and discharge current, voltage, etc. of the energy storage device 1000. As an example, the general control module includes modules such as an insulation monitoring module IMM (Insulation Monitoring Module), a main battery management unit MBMU (Master Battery Management Unit), an Ethernet ETH (EtherNet), and a fiber optic conversion module.

[0067] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., and is used for detecting, alarming, or extinguishing fires in the energy storage system.

[0068] As an example, the power distribution module may be used to distribute power to the modules in the energy storage device 1000 that need power.

[0069] According to some embodiments of the present application, with reference to Figures 1 to 3, an embodiment of the present application provides an energy storage device 1000, including a thermal management module 200 and a plurality of battery devices 100. Each battery device 100 includes a heat exchange component 110. The plurality of battery devices 100 are stacked to form at least two groups of battery assemblies 1100. The thermal management module 200 includes a thermal management unit 210, a first pipeline 220, a second pipeline 230, and a commutation device 240. The commutation device has a first port 241, a second port 242, a third port 243, and a fourth port 244. The first port 241 is connected to the liquid outlet end of the thermal management unit 210, the second port 242 is connected to the liquid return end of the thermal management unit 210, the third port 243 is connected to the first pipeline 220, and the fourth port 244 is connected to the second pipeline 230. The commutation device 240 is configured to be able to conduct the first port 241 and the third port 243 and conduct the second port 242 and the fourth port 244. Moreover, the commutation device 240 is configured to be able to switch to conduct the first port 241 and the fourth port 244 and conduct the second port 242 and the third port 243. The first pipeline 220 is connected to each heat exchange component 110, and the second pipeline 230 is connected to each heat exchange component 110. Among them, a part of the first pipeline 220 is located between adjacent two groups of battery assemblies 1100 and simultaneously connects adjacent heat exchange components 110; and / or, a part of the second pipeline 230 is located between adjacent two groups of battery assemblies 1100 and simultaneously connects adjacent heat exchange components 110.

[0070] The thermal management module 200 is used to circulate and provide a heat exchange medium. Among them, the heat exchange medium can adopt media such as cooling water and cooling oil.

[0071] The thermal management module 200 includes a thermal management unit 210, a first pipeline 220, and a second pipeline 230. Among them, the thermal management unit 210 is used to perform a refrigeration operation on the heat exchange medium. Exemplarily, the thermal management unit 210 includes but is not limited to a condenser, a compressor, a plate heat exchanger, etc. The condenser, the compressor, and the plate heat exchanger are used to realize the cyclic refrigeration of the heat exchange medium, and are circulated and provided to the heat exchange component 110 through the first pipeline 220 and the second pipeline 230, so that the heat exchange medium performs heat exchange in the heat exchange component 110, thereby realizing the heat exchange and cooling operation of the battery device 100.

[0072] The first pipeline 220 is used to connect the thermal management unit 210 and each heat exchange component 110. The first pipeline 220 is used for the circulation of the heat exchange medium. For example, the thermal management unit 210 can provide the heat exchange medium and introduce it into each heat exchange component 110 through the first pipeline 220, or the heat exchange medium that is heated after flowing through the heat exchange component 110 is introduced back into the thermal management unit 210 through the first pipeline 220. Optionally, the material of the first pipeline 220 can be selected as an insulating material (such as polyvinylidene fluoride material, polypropylene material, etc.) or a metal material (such as stainless steel pipe, aluminum pipe, copper pipe, alloy pipe, etc.).

[0073] The second pipeline 230 is used to connect the heat management unit 210 and each heat exchange component 110; the second pipeline 230 is used for the circulation of the heat exchange medium. For example, the heat management unit 210 can provide the heat exchange medium and introduce it into each heat exchange component 110 through the second pipeline 230, or the heat exchange medium that has been heated after flowing through the heat exchange component 110 for heat exchange is led back to the heat management unit 210 through the second pipeline 230. Optionally, the material of the second pipeline 230 can be selected from insulating materials (such as polyvinylidene fluoride material, polypropylene material, etc.) or metal materials (such as stainless steel pipes, aluminum pipes, copper pipes, alloy pipes, etc.).

[0074] The battery device 100 includes a heat exchange component 110. Optionally, the heat exchange component 110 can be, but is not limited to, a heat exchange plate, a heat exchange tube, or a heat exchange flow channel integrated on the wall plate of the battery device 100, etc. The heat management unit 210 can circulate and supply the heat exchange medium to the heat exchange component 110 through the first pipeline 220 and the second pipeline 230, so that the heat exchange medium flows in the heat exchange component 110 and absorbs the heat generated by the battery device 100 to achieve the purpose of cooling.

[0075] A plurality of battery devices 100 are stacked to form at least two groups of battery assemblies 1100; wherein, the battery assembly 1100 refers to a combined structure formed by stacking a plurality of battery devices 100. Exemplarily, in some embodiments, a plurality of battery devices 100 are electrically connected in series and / or in parallel through a busbar component, for example, a battery cluster can be formed.

[0076] The number of battery assemblies 1100 can be any group of two groups, three groups or more than three groups; multiple groups of battery assemblies 1100 can be arranged in any direction along the horizontal direction.

[0077] The commutation device 240 refers to a structure that can switch the communication paths between its multiple ports; optionally, the commutation device 240 can be a commutation valve, a four-way valve, an adjustable multi-channel valve structure, etc.

[0078] The commutation device 240 has a first port 241, a second port 242, a third port 243 and a fourth port 244; it can be understood that the commutation device 240 can be switched to connect the first port 241 to the third port 243 and the second port 242 to the fourth port 244, or switched to connect the first port 241 to the fourth port 244 and the second port 242 to the third port 243.

[0079] Among them, the first port 241 is connected to the liquid outlet end of the heat management unit 210, the second port 242 is connected to the liquid return end of the heat management unit 210, the third port 243 is connected to the first pipeline 220, and the fourth port 244 is connected to the second pipeline 230.

[0080] When the commutation device 240 switches to conduct the first port 241 and the third port 243 and conduct the second port 242 and the fourth port 244, at this time, the liquid outlet end of the heat management unit 210 is communicated with the first pipeline 220, and the liquid return end of the heat management unit 210 is communicated with the second pipeline 230; thus, the heat exchange medium exported by the heat management unit 210 can be introduced into the heat exchange component 110 through the first pipeline 220, and then exported from the heat exchange component 110 to the second pipeline 230 and returned to the heat management unit 210.

[0081] When the commutation device 240 switches to conduct the first port 241 and the fourth port 244 and conduct the second port 242 and the third port 243, at this time, the liquid outlet end of the heat management unit 210 is communicated with the second pipeline 230, and the liquid return end of the heat management unit 210 is communicated with the first pipeline 220; thus, the heat exchange medium exported by the heat management unit 210 can be introduced into the heat exchange component 110 through the second pipeline 230, and then exported from the heat exchange component 110 to the first pipeline 220 and returned to the heat management unit 210.

[0082] In this way, by switching and conducting the commutation device 240, the heat exchange medium exported by the heat management unit 210 can be switched and introduced into the first pipeline 220 or the second pipeline 230, so that the heat exchange medium can flow in a reverse direction in each heat exchange component 110.

[0083] It should be understood that when the heat exchange medium flows in the heat exchange component 110 and conducts heat exchange to cool down, the temperature of the heat exchange medium just entering the heat exchange component 110 is lower, while the temperature of the heat exchange medium flowing through the heat exchange component 110 and conducting heat exchange is higher. Therefore, there may be a temperature difference between the side of the heat exchange component 110 for introducing the heat exchange medium and the side of the heat exchange component 110 for exporting the heat exchange medium, that is, the temperature uniformity of the heat exchange component 110 may be affected. In this way, by using the commutation device 240 to switch the heat exchange medium exported by the heat management unit 210 to the first pipeline 220 and the second pipeline 230, so that the heat exchange medium can be introduced into the heat exchange component 110 in a reverse direction, that is, the side of the heat exchange component 110 for introducing the heat exchange medium can also be switched to the side for exporting the heat exchange medium. Similarly, the other side of the heat exchange component 110 for exporting the heat exchange medium can also be switched to the side for introducing the heat exchange medium; in this way, the influence of the temperature difference formed by the flow of the heat exchange medium in the heat exchange component 110 on the heat dissipation of the entire battery device 100 is reduced, and the heat exchange and cooling effect on the battery device 100 is improved.

[0084] A part of the first pipeline 220 is located between two adjacent groups of battery modules 1100; that is, when multiple groups of battery modules 1100 are arranged in sequence, a part of the first pipeline 220 can be arranged between two adjacent arranged groups of battery modules 1100, so that this part of the first pipeline 220 forms an adjacent arrangement with a plurality of battery devices 100 stacked in two adjacent groups of battery modules 1100.

[0085] Moreover, a part of the first pipeline 220 located between two adjacent groups of battery modules 1100 can be connected to the adjacent heat exchange components 110; that is, this part of the first pipeline 220 forms an adjacent arrangement with a plurality of battery devices 100 stacked in two adjacent groups of battery modules 1100 and is respectively connected. Thus, compared with the method of separately introducing a part of the first pipeline 220 to connect each group of battery modules 1100, the method of using a part of the first pipeline 220 to connect a plurality of battery devices 100 stacked in two adjacent groups of battery modules 1100 at the same time can effectively simplify the first pipeline 220, that is, only one section of the first pipeline 220 can connect all the heat exchange components 110 in two groups of battery modules 1100, so that the usage amount of the first pipeline 220 can be effectively saved. At the same time, since there is only one section of the first pipeline 220 between two adjacent groups of battery modules 1100, there is more installation space for this part of the first pipeline 220, so that a first pipeline 220 with a larger diameter can be adopted, the flow resistance of the first pipeline 220 is reduced, and further the power consumption required for the heat management unit 210 to pump the heat exchange medium can be reduced.

[0086] And / or, a part of the second pipeline 230 is located between two adjacent groups of battery modules 1100; that is, when multiple groups of battery modules 1100 are arranged in sequence, a part of the second pipeline 230 can be arranged between two adjacent arranged groups of battery modules 1100, so that this part of the second pipeline 230 forms an adjacent arrangement with a plurality of battery devices 100 stacked in two adjacent groups of battery modules 1100.

[0087] Moreover, a part of the second pipeline 230 located between two adjacent groups of battery modules 1100 can be connected to the adjacent heat exchange components 110; that is, this part of the second pipeline 230 forms an adjacent setting and is respectively connected to a plurality of battery devices 100 stacked in two adjacent groups of battery modules 1100. Thus, compared with the method of respectively introducing a part of the second pipeline 230 to connect each group of battery modules 1100, the method of using a part of the second pipeline 230 to simultaneously connect a plurality of battery devices 100 stacked in two adjacent groups of battery modules 1100 can effectively simplify the second pipeline 230, that is, only one section of the second pipeline 230 can simultaneously connect all the heat exchange components 110 in two groups of battery modules 1100, so that the usage amount of the second pipeline 230 can be effectively saved. At the same time, since there is only one section of the second pipeline 230 between two adjacent groups of battery modules 1100, there is more installation space for this part of the second pipeline 230, so that a second pipeline 230 with a larger diameter can be adopted, the flow resistance of the second pipeline 230 is reduced, and further the power consumption required for the heat management unit 210 to pump the heat exchange medium is reduced.

[0088] Optionally, a part of the first pipeline 220 and a part of the second pipeline 230 can be arranged at the same place, that is, a part of the first pipeline 220 and a part of the second pipeline 230 can be simultaneously arranged between two groups of battery modules 1100; or, a part of the first pipeline 220 and a part of the second pipeline 230 can be arranged at different places, that is, a part of the first pipeline 220 and a part of the second pipeline 230 can be respectively arranged between different two groups of battery modules 1100.

[0089] For the energy storage device 1000 provided by the embodiment of the present application, a part of the first pipeline 220 for connecting the heat management unit 210 and each heat exchange component 110 can be arranged between two adjacent battery modules 1100, and / or a part of the second pipeline 230 for connecting the heat management unit 210 and each heat exchange component 110 can be arranged between two adjacent battery modules 1100, so that a part of the first pipeline 220 and / or a part of the second pipeline 230 can be between two adjacent battery modules 1100 and simultaneously connect the adjacent heat exchange components 110 arranged. Compared with the design of independently connecting the pipeline for each heat exchange component 110 in each battery module 1100, the connection mode of the first pipeline 220 and / or the second pipeline 230 connecting the heat exchange components 110 in two adjacent battery modules 1100 can effectively reduce the pipeline consumption; and the first pipeline 220 and / or the second pipeline 230 can use a larger pipe diameter due to more sufficient installation space, so as to reduce the flow resistance of the first pipeline 220 and / or the second pipeline 230, and further reduce the power consumption required for the heat management unit 210 to pump the heat exchange medium, so as to achieve the purpose of reducing the overall cost of the energy storage device 1000. Moreover, the commutation device 240 can switch to conduct the first port 241 and the third port 243 and conduct the second port 242 and the fourth port 244, so as to realize that the heat management unit 210 introduces the heat exchange medium into each heat exchange component 110 through the first pipeline 220, or switch to conduct the first port 241 and the fourth port 244 and conduct the second port 242 and the third port 243, so as to realize that the heat management unit 210 introduces the heat exchange medium into each heat exchange component 110 through the second pipeline 230. Thus, the heat exchange and cooling effect on the battery device 100 can be improved.

[0090] Please refer to Figures 1 to 3, in some embodiments, the first pipeline 220 includes a first main pipeline 221, a first branch pipeline 222, and a first branch pipe 223. The first main pipeline 221 is connected to the third port 243, and the first branch pipeline 222 is connected to the first main pipeline 221. A plurality of first branch pipes 223 are provided on the first branch pipeline 222, and the first branch pipeline 222 is correspondingly connected to a plurality of heat exchange components 110 through the plurality of first branch pipes 223. The second pipeline 230 includes a second main pipeline 231, a second branch pipeline 232, and a second branch pipe 233. The second main pipeline 231 is connected to the fourth port 244, the second branch pipeline 232 is connected to the second main pipeline 231, a plurality of second branch pipes 233 are provided on the second branch pipeline 232, and the second branch pipeline 232 is correspondingly connected to a plurality of heat exchange components 110 through the plurality of second branch pipes 233. At least one first branch pipeline 222 is located between two adjacent sets of battery modules 1100 and is connected to the adjacent heat exchange components 110 through a plurality of first branch pipes 223; and / or, at least one second branch pipeline 232 is located between two adjacent sets of battery modules 1100 and is connected to the adjacent heat exchange components 110 through a plurality of second branch pipes 233.

[0091] The first pipeline 220 includes a first main pipeline 221, a first branch pipeline 222, and a first branch pipe 223. Among them, the first main pipeline 221 refers to the pipeline structure connected to the third port 243. For example, it can be connected to the liquid outlet end or the liquid return end of the thermal management unit 210 through the third port 243.

[0092] The first branch pipeline 222 refers to a branch pipeline connected to the first main pipeline 221. Optionally, the number of the first branch pipelines 222 can be any number of one, two, or more than two. The first main pipeline 221 can be connected to one or more first branch pipelines 222 at the same time.

[0093] Among them, at least one first branch pipeline 222 can be arranged between two adjacent sets of battery modules 1100. Exemplarily, one first branch pipeline 222 can be arranged between any two adjacent sets of battery modules 1100, and is respectively connected to the heat exchange components 110 of the plurality of battery devices 100 stacked in the two adjacent sets of battery modules 1100 through a plurality of first branch pipes 223; or, two or more first branch pipelines 222 can be respectively arranged between two adjacent sets of battery modules 1100, and the positions of each first branch pipeline 222 are different. In this way, each first branch pipeline 222 is respectively connected to the adjacent heat exchange components 110 through a plurality of first branch pipes 223.

[0094] The first pipeline 223 refers to the branch pipeline connected to the first sub-pipeline 222; optionally, the number of the first pipelines 223 connected to the first sub-pipeline 222 can be two, three or any number more than three. Multiple first pipelines 223 can be respectively connected to the heat exchange components 110 provided adjacent to the first sub-pipeline 222, so as to achieve the purpose of allowing the heat exchange medium to flow through each heat exchange component 110.

[0095] The second pipeline 230 includes a second main pipeline 231, a second sub-pipeline 232 and a second branch pipeline 233; wherein, the second main pipeline 231 refers to the pipeline structure connected to the fourth port 244, for example, it can be communicated to the liquid outlet end or the liquid return end of the heat management unit 210 through the fourth port 244.

[0096] The second sub-pipeline 232 refers to the branch pipeline connected to the second main pipeline 231; optionally, the number of the second sub-pipelines 232 can be one, two or any number more than two. The second main pipeline 231 can be simultaneously connected to one or more second sub-pipelines 232.

[0097] Wherein, at least one second sub-pipeline 232 can be arranged between two adjacent groups of battery modules 1100; exemplarily, one second sub-pipeline 232 can be arranged between any two adjacent groups of battery modules 1100, and respectively form connections with the heat exchange components 110 of the multiple battery devices 100 stacked in the two adjacent groups of battery modules 1100 through multiple second branch pipelines 233; or, two or more second sub-pipelines 232 can be respectively arranged between two adjacent groups of battery modules 1100, and the positions of each second sub-pipeline 232 are different. In this way, each second sub-pipeline 232 respectively forms a connection with the adjacent heat exchange component 110 through multiple second branch pipelines 233.

[0098] The second branch pipeline 233 refers to the branch pipeline connected to the second sub-pipeline 232; optionally, the number of the second branch pipelines 233 connected to the second sub-pipeline 232 can be two, three or any number more than three. Multiple second branch pipelines 233 can be respectively connected to the heat exchange components 110 provided adjacent to the second sub-pipeline 232, so as to achieve the purpose of allowing the heat exchange medium to flow through each heat exchange component 110.

[0099] With such a setting, at least one first branch pipe 222 is arranged between two adjacent groups of battery modules 1100, and the first branch pipe 222 is connected to the adjacent heat exchange components 110 in two adjacent groups of battery modules 1100 through a plurality of first branch pipes 223. In this way, the layout of the first branch pipe 222 can be optimized, and the overall consumption of the first pipeline 220 can be reduced; and / or, at least one second branch pipe 232 is arranged between two adjacent groups of battery modules 1100, and the second branch pipe 232 is connected to the adjacent heat exchange components 110 in two adjacent groups of battery modules 1100 through a plurality of second branch pipes 233. In this way, the layout of the second branch pipe 232 can be optimized, and the overall consumption of the second pipeline 230 can be reduced; in this way, the overall cost of the energy storage device 1000 can be reduced.

[0100] Please refer to Figures 1 to 3 , in some embodiments, on the arrangement direction L of the battery modules 1100, a first branch pipe 222 and a second branch pipe 232 are respectively arranged on opposite sides of at least one group of battery modules 1100; the first branch pipe 222 is correspondingly connected to the adjacent heat exchange components 110 through a plurality of first branch pipes 223, and the second branch pipe 232 is correspondingly connected to the adjacent heat exchange components 110 through a plurality of second branch pipes 233.

[0101] The arrangement direction L of the battery modules 1100 refers to the direction in which multiple groups of battery modules 1100 are arranged in sequence; exemplarily, when the battery modules 1100 are accommodated in a container, the arrangement direction L of the battery modules 1100 can be arranged along the length direction of the container.

[0102] On the arrangement direction L of the battery modules 1100, a first branch pipe 222 and a second branch pipe 232 are respectively arranged on opposite sides of at least one group of battery modules 1100; optionally, when the number of battery modules 1100 is multiple groups, a first branch pipe 222 and a second branch pipe 232 can be respectively arranged on opposite sides of the first group, the second group or any group of battery modules 1100 along the arrangement direction L; or, on opposite sides of each group of battery modules 1100 along the arrangement direction L are respectively a first branch pipe 222 and a second branch pipe 232. With such a setting, along the arrangement direction L of the battery modules 1100, the first branch pipe 222, the battery modules 1100 and the second branch pipe 232 are alternately arranged in sequence.

[0103] With such an arrangement, the first branch pipeline 222 and the second branch pipeline 232 can be alternately arranged on the opposite sides of at least one group of battery modules 1100 along the arrangement direction L of the battery modules 1100. In this way, the installation of the pipeline can be simplified to save the operation and maintenance costs. At the same time, the pipeline layout space in the arrangement direction L of the battery modules 1100 can be saved to improve the energy density of the energy storage device 1000, and the first branch pipeline 222 and the second branch pipeline 232 with a larger pipe diameter can be used to reduce the overall flow resistance of the first pipeline 220 and the second pipeline 230.

[0104] Please refer to Figures 1 to 3 , in some embodiments, on the arrangement direction L of the battery modules 1100, a first branch pipeline 222 and a second branch pipeline 232 are respectively arranged on the opposite sides of each group of battery modules 1100.

[0105] In this embodiment, each group of battery modules 1100 can be arranged such that a first branch pipeline 222 and a second branch pipeline 232 are respectively arranged on the opposite sides in the arrangement direction L of the battery modules 1100; in this way, it can be ensured that there is a pipeline structure (the first branch pipeline 222 or the second branch pipeline 232) between any two adjacent groups of battery modules 1100; therefore, the space utilization rate in the arrangement direction L of the battery modules 1100 can be further optimized.

[0106] Exemplarily, in some embodiments, when the number of battery modules 1100 is four groups, along the arrangement direction L of the battery modules 1100, the arrangement of the first branch pipeline 222, the battery modules 1100, and the second branch pipeline 232 is: the first branch pipeline 222, the first group of battery modules 1100, the second branch pipeline 232, the second group of battery modules 1100, the first branch pipeline 222, the third group of battery modules 1100, the second branch pipeline 232, the fourth group of battery modules 1100, the first branch pipeline 222; thus, the second branch pipeline 232 between the first group of battery modules 1100 and the second group of battery modules 1100 can be respectively connected to the heat exchange components 110 of all the stacked battery devices 100 in two adjacent groups of battery modules 1100 through a plurality of second branch pipelines 233, the first branch pipeline 222 between the second group of battery modules 1100 and the third group of battery modules 1100 can be respectively connected to the heat exchange components 110 of all the stacked battery devices 100 in two adjacent groups of battery modules 1100 through a plurality of first branch pipelines 223, and the second branch pipeline 232 between the third group of battery modules 1100 and the fourth group of battery modules 1100 can be respectively connected to the heat exchange components 110 of all the stacked battery devices 100 in two adjacent groups of battery modules 1100 through a plurality of second branch pipelines 233.

[0107] It should be understood that when the first pipeline 220 is connected to the return liquid end of the thermal management unit 210 through the reversing device 240, and the second pipeline 230 is connected to the liquid outlet end of the thermal management unit 210 through the reversing device 240, the second branch pipeline 233 is used to introduce heat exchange medium into the corresponding heat exchange component 110, and the heat exchange medium flowing through the heat exchange component 110 is discharged from the first branch pipeline 223.

[0108] With this arrangement, the first branch pipes 222 and the second branch pipes 232 can be alternately arranged on opposite sides of at least one group of battery assemblies 1100 along the arrangement direction L of the battery assemblies 1100. This simplifies pipeline installation, thereby reducing operation and maintenance costs, while also conserving pipeline layout space in the arrangement direction L of the battery assemblies 1100, thereby improving the energy density of the energy storage device 1000. Furthermore, since only one first branch pipe 222 or one second branch pipe 232 is provided between two adjacent groups of battery assemblies 1100, the installation space for the first branch pipe 222 or the second branch pipe 232 is larger, and the first branch pipe 222 or the second branch pipe 232 can adopt a larger pipe diameter, which can correspondingly reduce flow resistance and, in turn, reduce the operating power consumption of the thermal management unit 210 when pumping the heat exchange medium.

[0109] Please refer to Figures 1 to 3 In some embodiments, the reversing device 240 is a reversing valve.

[0110] In this embodiment, the reversing device 240 can be a reversing valve 240a. The reversing valve 240a is a valve used to control the flow direction of a fluid. It controls the direction of liquid or gas flow by changing the channel configuration inside the valve. In this embodiment, the reversing valve 240a can be a four-way reversing valve 240a.

[0111] It can be understood that the four passages of the reversing valve 240a are respectively the first port 241, the second port 242, the third port 243 and the fourth port 244. The four passages of the reversing valve 240a are respectively connected to the liquid outlet end of the thermal management unit 210, the liquid return end of the thermal management unit 210, the first pipeline 220 and the second pipeline 230 to achieve the purpose of reversing the heat exchange medium and introducing it into the heat exchange component 110.

[0112] Please refer to Figure 1 In some embodiments, the thermal management unit 210 is a vertical structure. In the arrangement direction L of the battery assemblies 1100, the thermal management unit 210 is arranged at the outermost side of the multiple battery assemblies 1100; in the gravity direction G, the liquid outlet and liquid return ends of the thermal management unit 210 are located on the bottom side of the thermal management unit 210.

[0113] Among them, the outermost side of the multiple groups of battery modules 1100 refers to the side of one battery module 1100 located on the outermost side that faces away from other battery modules 1100 in the arrangement direction L of the battery modules 1100.

[0114] In this embodiment, the heat management unit 210 adopts a vertical structure; among them, the vertical heat management unit 210 refers to a structure in which its main components (such as compressors, condensers, evaporators, expansion valves, fans, etc.) are arranged in the vertical direction. Thus, the horizontal space occupied by the vertical heat management unit 210 is small, and the floor area is small.

[0115] In the gravity direction G, the liquid outlet end and the liquid return end of the heat management unit 210 are located on the bottom side of the heat management unit 210; thus, when using the first pipeline 220 and the second pipeline 230 to connect the liquid outlet end and the liquid return end respectively, the first pipeline 220 and the second pipeline 230 can be connected at the bottom side of the heat management unit 210, so that the space required for connecting the liquid outlet end and the liquid return end of the heat management unit 210 to the first pipeline 220 and the second pipeline 230 respectively does not occupy the space in the arrangement direction LL of the battery modules 1100.

[0116] In the arrangement direction L of the battery modules 1100, the heat management unit 210 is arranged on the outermost side of the multiple groups of battery modules 1100; thus, the heat management unit 210 is separately arranged from the multiple groups of battery modules 1100. The heat management unit 210 can be respectively connected to the first pipeline 220 and the second pipeline 230 through the liquid outlet end and the liquid return end on the bottom side in the gravity direction G through the reversing device 240, so that the first main pipelines 221 and 231 of the first pipeline 220 and the second pipeline 230 are routed from the bottom side in the gravity direction G to the multiple groups of battery modules 1100, and the first branch pipelines 222 and the second branch pipelines 232 of the first pipeline 220 and the second pipeline 230 are alternately arranged between two adjacent groups of the multiple groups of battery modules 1100, and are respectively connected to the heat exchange components 110 of the battery devices 100 in the adjacent battery modules 1100 through multiple first branch pipelines 223 and multiple second branch pipelines 233.

[0117] With such an arrangement, the heat management unit 210 can adopt a vertical structure, and the battery modules 1100 and the heat management unit 210 can be separately arranged, that is, the heat management unit 210 is arranged on the outermost side of the multiple groups of battery modules 1100. Thus, the influence of the heat management unit 210 on the pipeline layout between the heat exchange components 110 inside the battery modules 1100 can be reduced; and the heat management unit 210 can perform the pipe connection operation on the liquid outlet end and the liquid return end at the bottom side, so that the influence of the space required for the pipe connection operation of the liquid outlet end and the liquid return end on the space in the arrangement direction L of the battery modules 1100 can be reduced, and the overall space utilization rate can be improved.

[0118] Please refer toFigure 2 and Figure 3 In some embodiments, the thermal management unit 210 has a horizontal structure. In the gravity direction G, the thermal management unit 210 is located at any position of the battery assembly 1100; in the arrangement direction L of the battery assembly 1100, the liquid outlet end and the liquid return end of the thermal management unit 210 are located on either side of the thermal management unit 210.

[0119] In this embodiment, the thermal management unit 210 adopts a horizontal structure; among them, the horizontal structure of the thermal management unit 210 refers to a structure in which its main components (such as compressors, condensers, evaporators, expansion valves, fans, etc.) are arranged in any direction in the horizontal direction (for example, along the arrangement direction L of the battery assembly 1100). Thus, the space occupied by the gravity direction G of the horizontal structure of the thermal management unit 210 is small.

[0120] In the gravity direction G, the thermal management unit 210 is arranged at any position of the battery assembly 1100; exemplarily, the thermal management unit 210 can be arranged between any two adjacent layers of the multi-layer battery device 100 in which multiple groups of battery assemblies 1100 are stacked, or the thermal management unit 210 can also be arranged on the topmost side of the battery assembly 1100.

[0121] In the arrangement direction L of the battery assembly 1100, the liquid outlet end and the liquid return end of the thermal management unit 210 are located on either side of the thermal management unit 210; thus, when the first pipeline 220 and the second pipeline 230 are respectively connected to the liquid outlet end and the liquid return end, the first pipeline 220 and the second pipeline 230 can be connected at the horizontal end side of the thermal management unit 210, so that the space required for connecting the liquid outlet end and the liquid return end of the thermal management unit 210 to the first pipeline 220 and the second pipeline 230 respectively does not occupy the stacking space of the battery device 100 in the battery assembly 1100.

[0122] With such an arrangement, the thermal management unit 210 can adopt a horizontal structure, and the thermal management unit 210 can be arranged at any position of the battery assembly 1100 along the gravity direction G to realize the stacked arrangement of the thermal management unit 210 and multiple groups of battery assemblies 1100; and the thermal management unit 210 can perform the pipe connection operation on either side of the battery assembly 1100 in the arrangement direction L for the liquid outlet end and the liquid return end. In this way, the space required for the pipe connection operation of the liquid outlet end and the liquid return end can be reduced from affecting the space in the gravity direction G, and the overall space utilization rate can be improved.

[0123] Please refer to Figure 2 , in some embodiments, in the gravity direction G, the thermal management unit 210 is located on the top side of multiple groups of battery assemblies 1100.

[0124] In this embodiment, the horizontal thermal management unit 210 is disposed on the top side of the battery assembly 1100 in the gravity direction G, that is, on the top of the battery device 100 at the uppermost layer of the stack; thus, the thermal management unit 210 is separately disposed from multiple groups of battery assemblies 1100. The thermal management unit 210 can connect the first pipeline 220 and the second pipeline 230 through the liquid outlet end and the liquid return end on one side in the arrangement direction L of the battery assemblies 1100, so that the first pipeline 220 and the second pipeline 230 are on the outermost side of multiple groups of battery assemblies 1100 and extend along the gravity direction G to the bottom side of the battery assemblies 1100, and then extend along the arrangement direction L of the battery assemblies 1100 for pipeline layout, so that the first main pipelines 221 and the second main pipelines 231 of the first pipeline 220 and the second pipeline 230 are laid to the bottom side of multiple groups of battery assemblies 1100, and the first branch pipelines 222 and the second branch pipelines 232 of the first pipeline 220 and the second pipeline 230 can be alternately disposed between two adjacent battery assemblies 1100 of multiple groups of battery assemblies 1100, and are respectively connected to the heat exchange components 110 of the battery devices 100 in the adjacent battery assemblies 1100 through multiple first branch pipelines 223 and second branch pipelines 233.

[0125] With such an arrangement, the battery assembly 1100 and the thermal management unit 210 can be separately disposed, that is, the thermal management unit 210 is disposed on the topmost side of multiple groups of battery assemblies 1100. In this way, the influence of the thermal management unit 210 on the pipeline layout between the heat exchange components 110 inside the battery assembly 1100 can be reduced, and the thermal management unit 210 on the top side can shield the battery assembly 1100 to reduce the influence of direct sunlight on the temperature of the topmost battery device 100 of the battery assembly 1100.

[0126] Please refer to Figure 3 , in some embodiments, in the gravity direction G, the thermal management unit 210 is located in the middle of the battery assembly 1100.

[0127] In this embodiment, the horizontal thermal management unit 210 is disposed in the middle of multiple groups of battery assemblies 1100 in the gravity direction G; exemplarily, when the number of stacked battery devices 100 in the battery assembly 1100 is an even number, the thermal management unit 210 can be located at the center of the battery assembly 1100 in the gravity direction G, that is, the number of stacked battery devices 100 on the opposite sides of the thermal management unit 210 is the same; when the number of stacked battery devices 100 in the battery assembly 1100 is an odd number, the thermal management unit 210 can be disposed in the middle area of the battery assembly 1100 in the gravity direction G. For example, the number of stacked battery devices 100 on the opposite sides of the thermal management unit 210 in the same group of battery assemblies 1100 can differ by one.

[0128] The thermal management unit 210 can connect the first pipeline 220 and the second pipeline 230 to the liquid outlet end and the liquid return end on either side in the arrangement direction L of the battery assembly 1100, so that the first pipeline 220 and the second pipeline 230 are routed along the gravity direction G on either side in the arrangement direction L of the battery assembly 1100 to the upper half and the lower half formed by separating each battery assembly 1100, and then are routed along the arrangement direction L of the battery assembly 1100 so that the first main pipeline 221 and the second main pipeline 231 are located at the bottom side of the upper half formed by separating the battery assembly 1100 and the bottom side of the lower half formed by separating the battery assembly 1100. Wherein, a first branch pipeline 222 and a second branch pipeline 232 are respectively arranged on the first main pipeline 221 and the second main pipeline 231 located at the bottom side of the upper half formed by separating the battery assembly 1100, and the first branch pipeline 222 and the second branch pipeline 232 are alternately arranged beside each group of battery assemblies 1100, and then are respectively connected to the heat exchange component 110 of the battery device 100 in the adjacent battery assembly 1100 through the first branch pipeline 223 and the second branch pipeline 233. Similarly, a first branch pipeline 222 and a second branch pipeline 232 are respectively arranged on the first main pipeline 221 and the second main pipeline 231 located at the bottom side of the lower half formed by separating the battery assembly 1100, and the first branch pipeline 222 and the second branch pipeline 232 are alternately arranged beside each group of battery assemblies 1100, and then are respectively connected to the heat exchange component 110 of the battery device 100 in the adjacent battery assembly 1100 through the first branch pipeline 223 and the second branch pipeline 233.

[0129] With such an arrangement, the thermal management unit 210 can be arranged in the middle of multiple groups of battery assemblies 1100, so as to facilitate the thermal management unit 210 to connect the first pipeline 220 and the second pipeline 230 to the upper half and the lower half of the battery assembly 1100 respectively.

[0130] Next, the energy storage device 1000 of the present application will be further described according to specific embodiments.

[0131] Please refer to Figures 1 to 3 , in this embodiment, the energy storage device 1000 includes a thermal management module 200 and multiple battery devices 100. The battery device 100 includes a heat exchange component 110, and multiple battery devices 100 are stacked to form at least two groups of battery assemblies 1100.

[0132] The thermal management module 200 includes a thermal management unit 210, a first pipeline 220, a second pipeline 230, and a commutation device 240; the first port 241 of the commutation device 240 is connected to the liquid outlet end of the thermal management unit 210, and the second port 242 of the commutation device 240 is connected to the liquid return end of the thermal management unit 210.

[0133] The first pipeline 220 includes a first main pipeline 221, a first branch pipeline 222, and a first sub - pipeline 223. The first main pipeline 221 is connected to the third port 243 of the reversing device 240, and the first branch pipeline 222 is connected to the first main pipeline 221. A plurality of first sub - pipelines 223 are provided on the first branch pipeline 222, and the first branch pipeline 222 is correspondingly connected to a plurality of heat exchange components 110 through the plurality of first sub - pipelines 223.

[0134] The second pipeline 230 includes a second main pipeline 231, a second branch pipeline 232, and a second sub - pipeline 233. The second main pipeline 231 is connected to the fourth port 244 of the reversing device 240, and the second branch pipeline 232 is connected to the second main pipeline 231. A plurality of second sub - pipelines 233 are provided on the second branch pipeline 232, and the second branch pipeline 232 is correspondingly connected to a plurality of heat exchange components 110 through the plurality of second sub - pipelines 233.

[0135] Among them, the number of battery modules 1100 is four groups; in the arrangement direction L of the battery modules 1100, first branch pipelines 222 are respectively provided on the outer sides of the first group and the fourth group among the four groups of battery modules 1100, and between the second group and the third group. Second branch pipelines 232 are respectively provided between the first group and the second group and between the third group and the fourth group among the four groups of battery modules 1100. Moreover, the first branch pipeline 222 is correspondingly connected to the heat exchange components 110 of all the battery devices 100 stacked in the adjacent battery modules 1100 through a plurality of first sub - pipelines 223, and the second branch pipeline 232 is correspondingly connected to the heat exchange components 110 of all the battery devices 100 stacked in the adjacent battery modules 1100 through a plurality of second sub - pipelines 233.

[0136] Please refer to Figures 1 to 4 , this embodiment of the present application also provides an energy storage system 2000, including a power conversion device 2100 and the energy storage device 1000 as described above. 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. The power conversion device 2100 is used to be connected between the power generation device 2200 and the energy storage device 1000. The power generation device 2200 is used to generate electric energy, and the electric energy generated by the power generation device 2200 can be stored in the energy storage device 1000 through the power conversion device 2100. As an example, the power generation device 2200 may specifically be a solar panel, a hydraulic power generation device, a thermal power generation device, a wind power generation device, etc. Among them, the specific type of the power generation device 2200 is not limited in this application.

[0138] The energy storage system 2000 provided by the embodiments of the present application includes the above-mentioned energy storage device 1000. On the basis that the cost of the above-mentioned energy storage device 1000 is relatively low, the cost of the energy storage system 2000 can be effectively reduced.

[0139] Please refer to Figures 1 to 5 , the embodiments of the present application further provide a charging network 3000, including a charging pile 3100 and the above-mentioned energy storage device 1000 or the above-mentioned energy storage system 2000. The energy storage device 1000 is used to provide electric energy for the charging pile 3100.

[0140] The embodiments of the present application provide 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, and the energy storage device 1000 is used to provide electric energy for the charging pile 3100. The charging pile 3100 and the battery device 100 in the energy storage device 1000 are electrically connected through a cable, and the battery device 100 can provide the electric energy stored in itself for the charging pile 3100. The charging pile 3100 has one or more connectors 3110, and the connectors 3110 are used to connect with an electrical device (such as a vehicle), so as to replenish energy to the electrical device.

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

[0142] The charging network 3000 provided by the embodiments of the present application includes the above-mentioned energy storage device 1000 or the above-mentioned energy storage system 2000. Thus, the cost of the charging network 3000 can be effectively reduced.

[0143] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that: including a plurality of battery devices, each of the battery devices including a heat exchange component; the plurality of battery devices are stacked to form at least two groups of battery modules; a thermal management module, including a thermal management unit, a first pipeline, a second pipeline, and a commutation device; the commutation device has a first port, a second port, a third port, and a fourth port, the first port is connected to the liquid outlet end of the thermal management unit, the second port is connected to the liquid return end of the thermal management unit, the third port is connected to the first pipeline, and the fourth port is connected to the second pipeline; the commutation device is configured to be able to conduct the first port and the third port and conduct the second port and the fourth port, and the commutation device is configured to be able to switch to conduct the first port and the fourth port and conduct the second port and the third port; the first pipeline is connected to each of the heat exchange components, and the second pipeline is connected to each of the heat exchange components; wherein, a part of the first pipeline is located between adjacent two groups of the battery modules and simultaneously connected to the adjacent heat exchange components; and / or, a part of the second pipeline is located between adjacent two groups of the battery modules and simultaneously connected to the adjacent heat exchange components.

2. The energy storage device according to claim 1, characterized in that: the first pipeline includes a first main pipeline, a first branch pipeline, and a first sub-pipeline, the first main pipeline is connected to the third port, and the first branch pipeline is connected to the first main pipeline; a plurality of the first sub-pipelines are arranged on the first branch pipeline, and the first branch pipeline is correspondingly connected to a plurality of the heat exchange components through the plurality of the first sub-pipelines; the second pipeline includes a second main pipeline, a second branch pipeline, and a second sub-pipeline, the second main pipeline is connected to the fourth port, the second branch pipeline is connected to the second main pipeline, a plurality of the second sub-pipelines are arranged on the second branch pipeline, and the second branch pipeline is correspondingly connected to a plurality of the heat exchange components through the plurality of the second sub-pipelines; at least one of the first branch pipelines is located between adjacent two groups of the battery modules and connected to the adjacent heat exchange components through the plurality of the first sub-pipelines; and / or, at least one of the second branch pipelines is located between adjacent two groups of the battery modules and connected to the adjacent heat exchange components through the plurality of the second sub-pipelines.

3. The energy storage device according to claim 2, wherein: in the arrangement direction of the battery modules, one of the first branch pipelines and one of the second branch pipelines are respectively arranged on opposite sides of at least one group of the battery modules; the first branch pipeline is correspondingly connected to the adjacent heat exchange components through the plurality of the first sub-pipelines, and the second branch pipeline is correspondingly connected to the adjacent heat exchange components through the plurality of the second sub-pipelines.

4. The energy storage device according to claim 3, characterized in that: in the arrangement direction of the battery modules, one of the first branch pipelines and one of the second branch pipelines are respectively arranged on opposite sides of each group of the battery modules.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: the commutation device is a commutation valve.

6. The energy storage device according to any one of claims 1 to 4, characterized in that: the thermal management unit is of a vertical structure, in the arrangement direction of the battery modules, the thermal management unit is arranged on the outermost side of multiple groups of the battery modules; in the gravity direction, the liquid outlet end and the liquid return end of the thermal management unit are located at the bottom side of the thermal management unit.

7. The energy storage device according to any one of claims 1 to 4, characterized in that: The thermal management unit is of a horizontal structure. In the gravity direction, the thermal management unit is located at any position of the battery assembly; in the arrangement direction of the battery assembly, the liquid outlet end and the liquid return end of the thermal management unit are located on any side of the thermal management unit.

8. The energy storage device according to claim 7, wherein: In the gravity direction, the thermal management unit is located on the top side of multiple groups of the battery assemblies.

9. The energy storage device according to claim 7, characterized in that: In the gravity direction, the thermal management unit is located in the middle of the battery assembly.

10. An energy storage system, characterized in that: It includes a power conversion device and the energy storage device according to any one of claims 1 to 9, and the power conversion device is used for electrically connecting the power generation device and the energy storage device.

11. A charging network, characterized in that: It includes a charging pile and the energy storage device according to any one of claims 1 to 9 or the energy storage system according to claim 10, and the energy storage device is used for providing electric energy for the charging pile.

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