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, and a heat management unit of the heat management module is connected with heat exchange parts of the battery devices through pipelines; wherein the at least two heat exchange components are connected in series to form at least two series connection groups, and the series connection groups are connected in parallel through pipelines; according to the energy storage device provided by the embodiment of the invention, the heat exchange medium provided by the heat management unit can be shunted into the multiple series connection sets connected in parallel through the pipelines, and the heat exchange medium sequentially flows through the multiple heat exchange components connected in series in the series connection sets and then flows back to the heat management unit; therefore, the temperature difference between the temperature of the heat exchange medium initially provided by the heat management unit and the temperature when the heat exchange medium flows back to the heat management unit is larger, the total flow of the heat exchange medium provided by the heat management unit can be reduced, and the operation power consumption of the heat exchange medium pumped into the heat management unit is reduced.

Description

Technical Field

[0001] The present 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 component of the battery device to achieve temperature reduction. However, in the related art, when the thermal management unit provides the heat exchange medium, the operating power consumption of the thermal management unit is relatively high, resulting in a relatively high cost of the energy storage device. Summary of the Utility Model

[0004] The purpose of the embodiments of the present application is to provide an energy storage device, aiming to solve the problem of relatively high operating power consumption of the thermal management unit of the energy storage device in the related art when providing the heat exchange medium.

[0005] To achieve the above purpose, the technical solution adopted in the embodiments of the present application is:

[0006] The embodiments of the present 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. The thermal management module includes a thermal management unit and a pipeline. The thermal management unit is connected to the heat exchange component through the pipeline; wherein, at least two heat exchange components are connected in series through the pipeline to form a series connection group, the number of series connection groups is at least two groups, and each group of series connection groups is arranged in parallel through the pipeline, and each heat exchange component arranged in series includes at least two liquid inlets and at least two liquid outlets.

[0007] The beneficial effects of the embodiments of the present application: In the energy storage device provided by the embodiments of the present application, the thermal management unit is connected to the heat exchange components of a plurality of battery devices through the pipeline and provides the heat exchange medium. Moreover, the heat exchange components of at least two battery devices are connected in series to form a series connection group, and each series connection group is arranged in parallel. In this way, the heat exchange medium provided by the thermal management unit can be branched through the pipeline into multiple groups of parallel series connection groups, and the heat exchange medium can sequentially flow through each series-connected heat exchange component in each series connection group and perform heat exchange for temperature reduction; thereby, the temperature difference between the temperature of the heat exchange medium provided by the thermal management unit and the temperature when the heat exchange medium flows through the multiple series-connected heat exchange components in each series connection group and is then led back to the thermal management unit increases, so that the total flow rate of the heat exchange medium provided by the thermal management unit can be reduced to reduce the operating power consumption of the thermal management unit for pumping the heat exchange medium.

[0008] In some embodiments, the pipeline includes a main liquid supply pipeline, liquid supply branch pipelines, a main liquid return pipeline, liquid return branch pipelines, and a series connection pipeline; the main liquid supply pipeline is connected to the liquid outlet end of the thermal management unit, and a plurality of liquid supply branch pipelines are connected to the main liquid supply pipeline, and the plurality of liquid supply branch pipelines are all connected to corresponding series connection groups; the main liquid return pipeline is connected to the liquid return end of the thermal management unit, and a plurality of liquid return branch pipelines are connected to the main liquid return pipeline, and the plurality of liquid return branch pipelines are all connected to corresponding series connection groups; the plurality of heat exchange components in the series connection group are sequentially connected through the series connection pipeline to form a series connection.

[0009] By adopting the above technical solution, the thermal management unit supplies a heat exchange medium into the main liquid supply pipeline through the liquid outlet end. The main liquid supply pipeline can distribute the heat exchange medium into a plurality of liquid supply branch pipelines and perform heat exchange cooling operations on each series connection group. Similarly, the heat exchange medium flowing back from each series connection group can be respectively converged into the main liquid return pipeline through the liquid return branch pipelines and then led back to the thermal management unit; in this way, by using one main liquid supply pipeline and one main liquid return pipeline, multiple series connection groups can be connected at the same time, effectively simplifying the pipeline layout, reducing the pipeline material consumption, and achieving the purpose of cost reduction.

[0010] In some embodiments, the main liquid supply pipeline includes a connected main liquid supply section and a liquid supply connection section. The main liquid supply section is connected to the liquid outlet end of the thermal management unit. Series connection groups are respectively arranged on the opposite sides of the liquid supply connection section. The liquid supply connection section is correspondingly connected to the series connection groups on both sides through a plurality of liquid supply branch pipelines; the main liquid return pipeline includes a connected main liquid return section and a liquid return connection section. The main liquid return section is connected to the liquid return end of the thermal management unit. Series connection groups are respectively arranged on the opposite sides of the liquid return connection section. The liquid return connection section is correspondingly connected to the series connection groups on both sides through a plurality of liquid return branch pipelines.

[0011] By adopting the above technical solution, series connection groups are respectively arranged on the opposite sides of the liquid supply connection section, so that the liquid supply connection section can be connected to the series connection groups on both sides at the same time through the liquid supply branch pipelines to reduce the number of liquid supply connection sections; similarly, series connection groups are respectively arranged on the opposite sides of the liquid return connection section, so that the liquid return connection section can be connected to the series connection groups on both sides at the same time through the liquid return branch pipelines to reduce the number of liquid return connection sections; in this way, the pipeline layout can be further simplified, and the material use of the pipeline can be further saved.

[0012] In some embodiments, a plurality of battery devices are stacked to form multiple groups of battery assemblies; the heat exchange components of the plurality of battery devices in at least one group of battery assemblies are connected in series to form a series connection group; and / or, the heat exchange components of at least one battery device in at least two groups of battery assemblies are connected in series to form a series connection group; in the arrangement direction of the battery assemblies, the liquid supply connection section and the liquid return connection section are located between any two adjacent groups of battery assemblies.

[0013] By adopting the above technical solution, the liquid supply connecting pipe section and the liquid return connecting pipe section can be arranged between any two sets among multiple sets of battery modules along the arrangement direction of the battery modules, and the liquid supply connecting pipe section and the liquid return connecting pipe section can be between any two sets of battery modules and connect the series connection groups on both sides.

[0014] In some embodiments, in the arrangement direction of the battery modules, the liquid supply connecting pipe section and the liquid return connecting pipe section are located at the same position among multiple sets of battery modules.

[0015] By adopting the above technical solution, arranging the liquid supply connecting pipe section and the liquid return connecting pipe section at the same position among multiple sets of battery modules can further simplify the pipeline layout to reduce the maintenance difficulty.

[0016] In some embodiments, in the arrangement direction of the battery modules, among multiple sets of battery modules on either side of the liquid supply connecting pipe section, the heat exchange components of the battery devices located on the same layer in at least two adjacent sets of battery modules are connected in series to form a series connection group; the liquid supply connecting pipe section is connected to the corresponding series connection group through multiple liquid supply branch pipes, and the liquid return connecting pipe section is connected to the corresponding series connection group through multiple liquid return branch pipes.

[0017] By adopting the above technical solution, the liquid supply connecting pipe section can connect the series connection groups at the opposite ends in the arrangement direction of the battery modules through the liquid supply branch pipes. Similarly, the liquid return connecting pipe section can connect the series connection groups at the opposite ends in the arrangement direction of the battery modules through the liquid return branch pipes.

[0018] In some embodiments, in the arrangement direction of the battery modules, among multiple sets of battery modules on either side of the liquid supply connecting pipe section, the heat exchange components of the battery devices located on the same layer in each set of battery modules are connected in series to form a series connection group.

[0019] By adopting the above technical solution, in the arrangement direction of the battery modules, multiple sets of battery modules on either side of the liquid supply connecting pipe section are connected in series on the same layer to form a set of series connection groups. The series connection groups of each layer can be respectively connected to the liquid supply connecting pipe section by using the liquid supply branch pipes, and the series connection groups of each layer can be respectively connected to the liquid return connecting pipe section by using the liquid return branch pipes.

[0020] In some embodiments, in the arrangement direction of the battery modules, the liquid supply connecting pipe section and the liquid return connecting pipe section are located in the middle of multiple sets of battery modules; the liquid supply connecting pipe section is connected to the heat exchange component with the shortest distance between them in the corresponding series connection group through the liquid supply branch pipe, and the liquid return connecting pipe section is connected to the heat exchange component with the shortest distance between them in the corresponding series connection group through the liquid return branch pipe.

[0021] By adopting the above technical solution, the pipeline layout lengths of the liquid supply branch pipes and the liquid return branch pipes are shorter, so that the pipeline layout can be further simplified and the cost can be reduced.

[0022] In some embodiments, the series pipeline includes a series liquid supply pipeline, a series liquid return pipeline and a conversion pipeline; a first flow channel and a second flow channel are formed inside the heat exchange component; in the series group, the first flow channel of the first of the multiple series-connected heat exchange components is connected to the liquid supply branch pipeline, the second flow channel of the first of the multiple series-connected heat exchange components is connected to the liquid return branch pipeline, the first flow channels of two adjacent ones of the multiple series-connected heat exchange components are connected through the series liquid supply pipeline, the second flow channels of two adjacent ones of the multiple series-connected heat exchange components are connected through the series return liquid pipeline, and the first flow channel and the second flow channel of the last one of the multiple series-connected heat exchange components are connected through the conversion pipeline.

[0023] By adopting the above-mentioned technical scheme, the liquid supply branch pipeline can introduce the heat exchange medium into the corresponding series group, and the heat exchange medium can enter the first flow channel of the first one of the multiple series-connected heat exchange components from the liquid supply branch pipeline, and flow through the first flow channel of each series-connected heat exchange component in sequence through the series-connected liquid supply pipeline. When the heat exchange medium flows to the first flow channel of the last one of the multiple series-connected heat exchange components, the heat exchange medium can flow to the second flow channel through the conversion pipeline for reflux, and flow through the second flow channel of each series-connected heat exchange component in sequence through the series-connected return liquid pipeline, until it flows into the second flow channel of the first one of the multiple series-connected heat exchange components, and then is exported from the return liquid branch pipeline; in this way, the temperature uniformity of the multiple series-connected heat exchange components in the series-connected group can be improved, so as to improve the overall cooling effect of the battery device.

[0024] In some embodiments, the first flow channel and the second flow channel are disposed adjacent to each other.

[0025] By adopting the above-mentioned technical solution, heat exchange can be formed between the heat exchange medium introduced into the first flow channel and the heat exchange medium refluxed in the second flow channel, so as to further improve the temperature uniformity of multiple series-connected heat exchange components in the series group, thereby further improving the overall cooling effect of the battery device.

[0026] In some embodiments, the thermal management unit is a vertical structure. In the arrangement direction of the battery assemblies, the thermal management unit is arranged at the outermost side of the multiple groups of battery assemblies; in the direction of gravity, the liquid outlet and liquid return ends of the thermal management unit are located on the bottom side of the thermal management unit.

[0027] By adopting the above-mentioned technical scheme, the thermal management unit can adopt a vertical structure, and the battery assembly and the thermal management unit can be arranged separately, that is, the thermal management unit is arranged at the outermost side of the multiple battery assemblies, thereby reducing the impact of the thermal management unit on the piping layout inside the battery assembly; and the thermal management unit can perform pipe connection operations on the liquid outlet and the liquid return end on the bottom side, thereby reducing the impact of the space required for the pipe connection operations of the liquid outlet and the liquid return end on the space in the arrangement direction of the battery assembly and improving the overall space utilization.

[0028] In some embodiments, the thermal management unit has a horizontal structure and, in the direction of gravity, 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 either side of the thermal management unit.

[0029] 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 along the direction of gravity of the battery assembly 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 either 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, and the overall space utilization rate can be improved.

[0030] In some embodiments, in the direction of gravity, the thermal management unit is located on the top side of multiple groups of battery assemblies.

[0031] 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 topmost layer of the battery assembly.

[0032] In some embodiments, in the direction of gravity, the thermal management unit is located in the middle of the battery assembly.

[0033] 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 connection of pipelines for the upper half and the lower half of the battery assembly by the thermal management unit.

[0034] In some embodiments, the thermal management module further includes a flow control structure, and the flow control structure is provided on at least a part of the liquid supply branch pipeline.

[0035] By adopting the above technical solution, the flow control structure can be used to control the flow rate of the heat exchange medium introduced into the liquid supply branch pipeline to meet the cooling requirements of different series-connected groups.

[0036] In some embodiments, the flow control structure includes a control valve, and the control valve is arranged on the liquid supply branch pipeline; and / or, the flow control structure includes a control pipeline, the control pipeline is connected in series with the liquid supply branch pipeline, and the pipe diameter of the control pipeline is different from that of the liquid supply branch pipeline.

[0037] By adopting the above technical solution, the flow control structure may include a control valve, and the control valve is used to achieve the flow control of the liquid supply branch pipeline; and / or, the flow control structure may include a control pipeline, the control pipeline is set to have a different diameter from that of the liquid supply branch pipeline, and the control pipeline is connected in series with the liquid supply branch pipeline, so as to control the flow difference of the heat exchange medium in each liquid supply branch pipeline.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments or the related technical descriptions. 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.

[0043] Figure 1 It is a schematic structural diagram of one of the energy storage devices provided by some embodiments of the present application;

[0044] Figure 2 It is a schematic structural diagram of one of the energy storage devices provided by some embodiments of the present application;

[0045] Figure 3 It is a schematic structural diagram of one of the energy storage devices provided by some embodiments of the present application;

[0046] Figure 4 It is a schematic structural diagram of a heat exchange component provided by some embodiments of the present application;

[0047] Figure 5 It is a schematic diagram of an energy storage system provided by some embodiments of the present application;

[0048] Figure 6 A schematic diagram of a charging network provided for some embodiments of the present application.

[0049] Among them, the reference numerals in the figure are as follows:

[0050] 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;

[0051] 100, battery device; 110, heat exchange component; 110a, liquid inlet; 110b, liquid outlet; 111, first flow channel; 112, second flow channel; 100a, series connection group;

[0052] 200, thermal management module; 210, thermal management unit; 220, pipeline; 221, liquid supply main pipeline; 221a, liquid supply main pipe section; 221b, liquid supply connection pipe section; 222, liquid supply branch pipeline; 223, liquid return main pipeline; 223a, liquid return main pipe section; 223b, liquid return connection pipe section; 224, liquid return branch pipeline; 225, series connection pipeline; 225a, series connection liquid supply pipeline; 225b, series connection liquid return pipeline; 225c, conversion pipeline;

[0053] L, arrangement direction of the battery assembly; G, gravity direction. Detailed implementation manners

[0054] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0055] 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 a limitation to the present application.

[0056] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0057] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall 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 internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] 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 electrical energy, in which a battery device is placed, and it has the characteristics of being convenient for installation and transportation, high integration, small floor area, and good expandability. It 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 technologies, energy storage devices have become one of the more important research directions in the new energy field.

[0059] The energy storage device is used as a supplementary and backup system for the power grid. The battery device inside the energy storage device may generate a large amount of heat during operation; therefore, it is necessary to use a thermal management unit to supply a heat exchange medium to the heat exchange component of the battery device to achieve cooling. In related technologies, the battery devices in the energy storage device mainly adopt a parallel design, using pipelines to connect the battery devices to form multiple parallel cooling circuits, and using a thermal management unit to introduce the heat exchange medium into the multiple cooling circuits. However, the parallel connection method requires a large flow rate of the heat exchange medium, which in turn leads to a high operating power consumption of the thermal management unit.

[0060] Based on the above considerations, in order to solve the problem of high operating power consumption of the thermal management unit when the energy storage device in the related technology adopts a parallel scheme to provide a heat exchange medium, an energy storage device is designed. The energy storage device uses the thermal management unit to circulate and introduce the heat exchange medium to the heat exchange components of the battery device through pipelines to achieve heat exchange and cooling. Among them, at least two heat exchange components are connected in series to form at least two series-connected groups, and each series-connected group is connected in parallel. Thus, the heat exchange medium provided by the thermal management unit through the pipeline needs to flow through at least two heat exchange components in each series-connected component in turn. The temperature difference between the temperature of the heat exchange medium when it flows back to the thermal management unit after flowing through multiple heat exchange components and the temperature of the heat exchange medium initially provided by the thermal management unit is larger. Therefore, the total flow rate of the heat exchange medium provided by the thermal management unit can be reduced, and thus the operating power consumption of the thermal management unit for pumping the heat exchange medium can be reduced.

[0061] 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.

[0062] Next, the energy storage device provided by the embodiments of the present application will be introduced and described.

[0063] Please refer to Figure 1 , the embodiments of the present application provide an energy storage device 1000, including one or more battery assemblies 1100 to increase the voltage and capacity of the energy storage device 1000. The battery assembly 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 assemblies 1100, the plurality of battery assemblies 1100 are connected in parallel to increase the capacity of the energy storage device 1000.

[0064] 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.

[0065] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0066] As an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0067] In some embodiments, the battery device 100 can 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.

[0068] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the housing by fixing the battery module in the housing.

[0069] As an example, the battery cell assembly can also be accommodated in the housing by directly fixing a plurality of battery cells to the housing.

[0070] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can activate the active material and continue to be used by charging after discharging the battery cell.

[0071] The battery cell can 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.

[0072] 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 provide electrical energy to relevant users or electrical equipment during the high electricity consumption period. 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.

[0073] In some embodiments, the energy storage device 1000 is an energy storage container or an energy storage cabinet.

[0074] In some embodiments, the energy storage device 1000 can include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0075] In some embodiments, the energy storage device 1000 can include modules such as a thermal management module, a main control module, a general control module, a power distribution module, and a fire protection module.

[0076] As an example, the thermal management module can include a liquid cooling unit, and the liquid cooling unit provides coolant for adjusting the temperature of the battery cells to each battery device 100 through pipelines.

[0077] As an example, the main control module can serve as the battery management unit of the battery cluster and is 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 example, it can control the charging and discharging current, voltage, etc. of the battery cluster. The main control module includes an auxiliary battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch, and other modules.

[0078] As an example, the master control module can serve as the battery management unit of the energy storage device 1000 and is used to monitor and manage the energy storage device 1000. The master control module can 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 master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a main battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and a fiber optic conversion module, etc.

[0079] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., and is used to detect, alarm, or extinguish fires in the energy storage system.

[0080] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 1000 that require power.

[0081] 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, which includes a thermal management module 200 and a plurality of battery devices 100. Each battery device 100 includes a heat exchange component 110. The thermal management module 200 includes a thermal management unit 210 and a pipeline 220. The thermal management unit 210 is connected to the heat exchange component 110 through the pipeline 220; wherein, at least two heat exchange components 110 are connected in series through the pipeline 220 to form a series connection group 100a. The number of series connection groups 100a is at least two groups. Each group of series connection groups 100a is arranged in parallel through the pipeline 220, and each heat exchange component 110 arranged in series includes at least two liquid inlets 110a and at least two liquid outlets 110b.

[0082] 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.

[0083] The thermal management module 200 includes a thermal management unit 210 and a pipeline 220; wherein, the thermal management unit 210 is used to perform refrigeration operations 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, compressor, and plate heat exchanger are used to realize cyclic refrigeration of the heat exchange medium and circulate it through the pipeline 220 to the heat exchange component 110, 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.

[0084] The pipeline 220 is used for the circulation of heat exchange medium; optionally, the material of the pipeline 220 can be selected as an insulating material (such as polyvinylidene fluoride material, polypropylene material, etc.) or a metal material (such as a stainless steel pipe, an aluminum pipe, a copper pipe, an alloy pipe, etc.).

[0085] The battery device 100 includes a heat exchange component 110. Optionally, the heat exchange component 110 may be, but is not limited to, a heat exchange plate, a heat exchange tube, or a heat exchange channel integrated on a wall panel of the battery device 100. The thermal management unit 210 can be connected to the heat exchange component 110 through a pipeline 220 and provide a heat exchange medium into the heat exchange component 110, so that the heat exchange medium absorbs the heat generated by the battery device 100 in the heat exchange component 110 to achieve the purpose of cooling.

[0086] Among them, each heat exchange component 110 arranged in series includes at least two liquid inlets 110a and at least two liquid outlets 110b; optionally, a flow channel can be arranged inside the heat exchange component 110, and at least two liquid inlets 110a and at least two liquid outlets 110b can be opened on the flow channel; the at least two liquid inlets 110a and at least two liquid outlets 110b can be connected at the same time by a pipeline 220, so that the pipeline 220 can simultaneously supply heat exchange medium into one flow channel through at least two liquid inlets 110a, and the heat exchange medium can be simultaneously discharged from the flow channel through at least two liquid outlets 110b.

[0087] Alternatively, at least two flow channels may be provided inside the heat exchange component 110, and each flow channel may have a liquid outlet 110b and a liquid inlet 110a; in this way, the heat exchange medium may be introduced into the flow channel from the liquid inlet 110a of one of the flow channels, and discharged from the liquid outlet 110b of the flow channel, and the discharged heat exchange medium may continue to be introduced into another flow channel of the same heat exchange component 110, or may also be introduced into the flow channel of another heat exchange component 110.

[0088] The pipeline 220 is used to provide the flow of heat exchange medium; optionally, the material of the pipeline 220 can be selected as an insulating material (such as polyvinylidene fluoride material, polypropylene material, etc.) or a metal material (such as a stainless steel tube, an aluminum tube, a copper tube, an alloy tube, etc.). It should be understood that the pipeline 220 can be connected to the heat exchange components 110 corresponding to each of the multiple battery devices 100, so that the multiple heat exchange components 110 can be connected in series and in parallel through the pipeline 220.

[0089] The number of battery devices 100 is multiple; optionally, the multiple battery devices 100 can be arranged in any form; or, the multiple battery devices 100 are arranged in an array, that is, the multiple battery devices 100 can be arranged in rows, columns or other geometric structures in a certain rule and form. Exemplarily, the multiple battery devices 100 can be arranged in an array form of at least two rows and at least two columns.

[0090] Among them, at least two heat exchange components 110 are connected in series to form a series connection group 100a, and the number of series connection groups 100a is at least two groups; optionally, among the multiple heat exchange components 110 of multiple battery devices 100, some of the heat exchange components 110 can be connected in series by a pipeline 220 to form a series connection group 100a, for example, any number of two, three or more than three; thus, the multiple heat exchange components 110 of multiple battery devices 100 can be respectively connected in series to form two or more series connection groups 100a.

[0091] At the same time, multiple series connection groups 100a can be connected in parallel by using the pipeline 220; in this way, the heat exchange medium provided by the heat management unit 210 can be synchronously shunted into multiple series connection groups 100a through the pipeline 220, and the cooling medium flows through each series-connected heat exchange component 110 in each series connection group 100a in turn, so as to be able to perform heat exchange and cooling operations on each battery device 100.

[0092] It should be understood that compared with the method of connecting multiple heat exchange components 110 in parallel respectively, after at least two heat exchange components 110 are connected in series to form a series connection group 100a and then each series connection group 100a is connected in parallel, the heat exchange medium provided by the heat management unit 210 can be introduced into each series connection group 100a through the pipeline 220, and the heat exchange medium can flow through multiple series-connected heat exchange components 110 in each series connection group 100a in turn and perform heat exchange in turn; thus, the temperature difference of the heat exchange medium when it flows back to the heat management unit 210 after flowing through multiple series-connected heat exchange components 110 is larger than the temperature difference of the heat exchange medium initially exported by the heat management unit 210.

[0093] According to the heat exchange formula: the heat of the battery device 100 is the product of the heat transfer coefficient, the flow rate of the heat exchange medium, and the supply-return water temperature difference of the heat exchange medium. It can be known that when the heat transfer coefficient is constant, in order to maintain a certain value of the heat of the battery device 100, the flow rate of the heat exchange medium can be correspondingly reduced by increasing the supply-return water temperature difference of the heat exchange medium; in this way, the temperature difference of the heat exchange medium is larger after flowing through multiple series-connected heat exchange components 110, so that the flow rate of the heat exchange medium can be effectively reduced, thereby effectively reducing the operating power consumption of the heat management unit 210 for pumping the heat exchange medium. At the same time, when at least two heat exchange components 110 are connected in series, only the pipeline 220 needs to be directly connected between the series-connected heat exchange components 110, that is, the pipeline 220 uses less materials and the installation of the pipeline 220 is more convenient, so that the product cost and operation and maintenance cost can be reduced.

[0094] The energy storage device 1000 provided by the embodiment of the present application, the heat management unit 210 is connected to the heat exchange components 110 of multiple battery devices 100 through pipelines 220 and provides a heat exchange medium. Moreover, the heat exchange components 110 of at least two battery devices 100 are connected in series through pipelines 220 to form a series connection group 100a, and each series connection group 100a is arranged in parallel through pipelines 220. In this way, the heat exchange medium provided by the heat management unit 210 can be branched through the pipelines 220 into multiple groups of parallel series connection groups 100a, and the heat exchange medium can sequentially flow through each series-connected heat exchange component 110 in each series connection group 100a for heat exchange and cooling. Thus, the temperature difference between the heat exchange medium initially provided by the heat management unit 210 and the temperature when the heat exchange medium flows back to the heat management unit 210 after flowing through multiple series-connected heat exchange components 110 in each series connection group 100a is relatively large, so that the total flow rate of the heat exchange medium provided by the heat management unit 210 can be reduced, and therefore the operating power consumption of the heat management unit 210 for pumping the heat exchange medium can be reduced.

[0095] Please refer to Figures 1 to 3 , in some embodiments, the pipeline 220 includes a liquid supply main pipeline 221, a liquid supply branch pipeline 222, a liquid return main pipeline 223, a liquid return branch pipeline 224, and a series connection pipeline 225; the liquid supply main pipeline 221 is connected to the liquid outlet end of the heat management unit 210 (not shown in the figure), and multiple liquid supply branch pipelines 222 are connected to the liquid supply main pipeline 221, and the multiple liquid supply branch pipelines 222 are respectively connected to the corresponding series connection groups 100a; the liquid return main pipeline 223 is connected to the liquid return end of the heat management unit 210 (not shown in the figure), and multiple liquid return branch pipelines 224 are connected to the liquid return main pipeline 223, and the multiple liquid return branch pipelines 224 are respectively connected to the corresponding series connection groups 100a; the multiple heat exchange components 110 in the series connection group 100a are sequentially connected through the series connection pipeline 225 to form a series connection.

[0096] It can be understood that the liquid outlet end of the heat management unit 210 refers to the port of the heat management unit 210 for circulating and discharging the heat exchange medium; the liquid return end of the heat management unit 210 refers to the port where the heat exchange medium flows back into the heat management unit 210 after flowing through the heat exchange component 110 and undergoing heat exchange and temperature rise.

[0097] The liquid supply main pipeline 221 refers to the pipeline structure connected to the liquid outlet end of the heat management unit 210. The heat exchange medium discharged by the heat management unit 210 through the liquid outlet end can be completely introduced into the liquid supply main pipeline 221, and then the liquid supply main pipeline 221 branches through multiple liquid supply branch pipelines 222 into each group of series connection groups 100a.

[0098] The liquid supply branch pipeline 222 refers to a branch pipe body connected to the liquid supply main pipeline 221; optionally, the number of liquid supply branch pipelines 222 connected to the liquid supply main pipeline 221 can be two, three or any number more than three. Multiple liquid supply branch pipelines 222 can be respectively connected to the heat exchange components 110 in multiple series connection groups 100a to introduce the heat exchange medium into the heat exchange components 110 connected in series in the corresponding series connection groups 100a.

[0099] Optionally, the number of liquid supply main pipelines 221 can be one. By extending the liquid supply main pipeline 221 between multiple battery devices 100, and then using multiple liquid supply branch pipelines 222 to shunt and connect the corresponding series connection groups 100a and the liquid supply main pipeline 221, the purpose of supplying the heat exchange medium can be achieved.

[0100] In this way, the heat exchange medium exported by the heat management unit 210 can be introduced into the liquid supply main pipeline 221, and the liquid supply main pipeline 221 can shunt to multiple liquid supply branch pipelines 222, so that the heat exchange medium is shunted into multiple groups of series connection groups 100a, and the heat exchange medium flows through multiple heat exchange components 110 connected in series in turn and conducts heat exchange for cooling.

[0101] The liquid return branch pipeline 224 refers to a pipe body structure connected to one of the heat exchange components 110 in the corresponding series connection group 100a; after the heat exchange medium is introduced into the series connection group 100a by the liquid supply branch pipeline 222, the heat exchange medium flows through multiple heat exchange components 110 connected in series in turn and is exported from the liquid return branch pipeline 224. It should be understood that each series connection group 100a is provided with a liquid return branch pipeline 224 connected to one of the heat exchange components 110.

[0102] The liquid return main pipeline 223 refers to a pipe body structure connected to the liquid return end of the heat management unit 210, and multiple liquid return branch pipelines 224 are respectively connected to the liquid return main pipeline 223; in this way, the heated heat exchange medium exported from each group of series connection groups 100a can respectively converge from the corresponding liquid return branch pipeline 224 into the liquid return main pipeline 223, and is led back into the heat management unit 210 through the liquid return end for cooling.

[0103] With such a setting, the heat management unit 210 supplies the heat exchange medium into the liquid supply main pipeline 221 through the liquid outlet end. The liquid supply main pipeline 221 can shunt the heat exchange medium into multiple liquid supply branch pipelines 222 and perform heat exchange cooling operations on each group of series connection groups 100a. Similarly, the heat exchange medium refluxed from each group of series connection groups 100a can respectively converge into the liquid return main pipeline 223 through the liquid return branch pipeline 224 and then be led back into the heat management unit 210; in this way, by using one liquid supply main pipeline 221 and one liquid return main pipeline 223, multiple groups of series connection groups 100a can be connected at the same time, thus effectively simplifying the layout of the pipeline 220, reducing the material used for the pipeline 220, and achieving the purpose of reducing costs.

[0104] Please refer to Figures 1 to 3 , in some embodiments, the main liquid supply pipeline 221 includes a connected main liquid supply pipe section 221a and a liquid supply connection pipe section 221b. The main liquid supply pipe section 221a is connected to the liquid outlet end of the thermal management unit 210. On opposite sides of the liquid supply connection pipe section 221b, there are respectively arranged series connection groups 100a. The liquid supply connection pipe section 221b is connected to the series connection groups 100a on both sides through a plurality of liquid supply branch pipelines 222; the main liquid return pipeline 223 includes a connected main liquid return pipe section 223a and a liquid return connection pipe section 223b. The main liquid return pipe section 223a is connected to the liquid return end of the thermal management unit 210. On opposite sides of the liquid return connection pipe section 223b, there are respectively arranged series connection groups 100a. The liquid return connection pipe section 223b is connected to the series connection groups 100a on both sides through a plurality of liquid return branch pipelines 224.

[0105] The main liquid supply pipeline 221 includes a main liquid supply pipe section 221a and a liquid supply connection pipe section 221b; it can be understood that the main liquid supply pipe section 221a and the liquid supply connection pipe section 221b refer to two different pipe section structures on the main liquid supply pipeline 221.

[0106] The main liquid supply pipe section 221a is used to connect to the liquid outlet end of the thermal management unit 210, so that the heat exchange medium discharged from the liquid outlet end of the thermal management unit 210 can enter the main liquid supply pipe section 221a. Optionally, the main liquid supply pipe section 221a can be arranged on the outermost side of a plurality of battery devices 100, and the pipe body can be routed from the outermost side of the plurality of battery devices 100.

[0107] The liquid supply connection pipe section 221b is used to connect to a plurality of liquid supply branch pipelines 222, and the liquid supply connection pipe section 221b is communicated with the main liquid supply pipe section 221a; thus, the heat exchange medium can enter the liquid supply connection pipe section 221b from the main liquid supply pipe section 221a, and is split in the liquid supply pipe section to each liquid supply branch pipeline 222 and correspondingly introduced into each series connection group 100a. Optionally, at least a part of the liquid supply connection pipe section 221b can be arranged between a plurality of battery devices 100, so as to facilitate the connection between the heat exchange component 110 of the battery device 100 therein and the liquid supply connection pipe section 221b through the liquid supply branch pipeline 222.

[0108] On opposite sides of the liquid supply connection pipe section 221b, there are respectively arranged series connection groups 100a; it can be understood that the opposite sides of the liquid supply connection pipe section 221b refer to the opposite sides in the direction perpendicular to the length direction of the liquid supply connection pipe section 221b. In this way, the liquid supply connection pipe section 221b can be connected to the series connection groups 100a on both sides through a plurality of liquid supply branch pipelines 222.

[0109] The liquid return main pipeline 223 includes a liquid return main pipe section 223a and a liquid return connection pipe section 223b; it can be understood that the liquid return main pipe section 223a and the liquid return connection pipe section 223b refer to two different pipe section structures on the liquid return main pipeline 223.

[0110] The liquid return main pipe section 223a is used to connect the liquid return end of the heat management unit 210, so that the liquid return main pipe section 223a can guide the heat exchange medium that has been heated up after heat exchange from the liquid return end back into the heat management unit 210. Optionally, the liquid return main pipe section 223a can be arranged on the outermost side of multiple battery devices 100, and the pipe body can be routed from the outermost side of the multiple battery devices 100.

[0111] The liquid return connection pipe section 223b is used to connect with multiple liquid return branch pipelines 224, and the liquid return connection pipe section 223b communicates with the liquid return main pipe section 223a; thus, the heat exchange medium derived from each series connection group 100a can be respectively converged into the liquid return connection pipe section 223b through the corresponding liquid return branch pipelines 224, and then be guided back into the heat management unit 210 through the liquid return main pipe section 223a. Optionally, at least part of the liquid return connection pipe section 223b can be arranged between multiple battery devices 100, so as to facilitate the connection between the heat exchange component 110 of the battery device 100 therein and the liquid return connection pipe section 223b through the liquid return branch pipeline 224.

[0112] Series connection groups 100a are respectively arranged on the opposite sides of the liquid return connection pipe section 223b; it can be understood that the opposite sides of the liquid return connection pipe section 223b refer to the opposite sides in the direction perpendicular to the length direction of the liquid return connection pipe section 223b. In this way, the liquid return connection pipe section 223b can be respectively connected to the series connection groups 100a on both sides through multiple liquid return branch pipelines 224.

[0113] With such a setting, series connection groups 100a are respectively arranged on the opposite sides of the liquid supply connection pipe section 221b, so that the liquid supply connection pipe section 221b can be simultaneously connected to the series connection groups 100a on the opposite sides through the liquid supply branch pipelines 222 to reduce the number of liquid supply connection pipe sections 221b; similarly, series connection groups 100a are respectively arranged on the opposite sides of the liquid return connection pipe section 223b, so that the liquid return connection pipe section 223b can be simultaneously connected to the series connection groups 100a on the opposite sides through the liquid return branch pipelines 224 to reduce the number of liquid return connection pipe sections 223b; in this way, the pipe body layout can be further simplified, and the material use of the pipe body can be further saved.

[0114] Please refer to Figures 1 to 3, in some embodiments, multiple battery devices 100 are stacked to form multiple groups of battery assemblies 1100; the heat exchange components 110 of the multiple battery devices 100 in at least one group of battery assemblies 1100 are connected in series to form a series connection group 100a; and / or, the heat exchange components 110 of at least one battery device 100 in at least two groups of battery assemblies 1100 are connected in series to form a series connection group 100a; in the arrangement direction L of the battery assemblies 1100, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are located between any two adjacent groups of battery assemblies 1100.

[0115] The battery assembly 1100 refers to a combined structure formed by stacking multiple battery devices 100. Exemplarily, in some embodiments, multiple battery devices 100 are electrically connected in series and / or in parallel through a busbar component, for example, a battery cluster can be formed.

[0116] The number of battery assemblies 1100 can be any group of two, three, or more than three groups; multiple groups of battery assemblies 1100 can be arranged in any direction along the horizontal direction.

[0117] Optionally, the heat exchange components 110 of the multiple battery devices 100 in at least one group of battery assemblies 1100 can be connected in series to form a series connection group 100a; Exemplarily, some of the battery devices 100 in any group of battery assemblies 1100 can be connected in series in sequence to form a series connection group 100a. For example, each group of battery assemblies 1100 can respectively form two or more groups of series connection groups 100a. Or, all the battery devices 100 in any group of battery assemblies 1100 can be connected in series in sequence to form a series connection group 100a. For example, each group of battery assemblies 1100 can respectively form one group of series connection group 100a.

[0118] And / or, the heat exchange components 110 of at least one battery device 100 in at least two groups of battery assemblies 1100 can be connected in series to form a series connection group 100a; Exemplarily, in at least two of the groups of battery assemblies 1100, at least one battery device 100 is selected from each group of battery assemblies 1100 and connected in series; Exemplarily, in every two adjacent groups of battery assemblies 1100, one battery device 100 of one group of battery assemblies 1100 is connected in series with one battery device 100 of the other group of battery assemblies 1100 to form a series connection group 100a, so that multiple groups of series connection groups 100a can be formed for the two adjacent groups of battery assemblies 1100.

[0119] Meanwhile, in the arrangement direction L of the battery modules 1100, the liquid supply connection pipe section 221b is located between any two adjacent sets of battery modules 1100; optionally, the liquid supply connection pipe section 221b may be located between the first set and the second set along the arrangement direction L of the battery modules 1100, or the liquid supply connection pipe section 221b may be located between the second set and the third set along the arrangement direction L of the battery modules 1100, or the liquid supply connection pipe section 221b may be located between the nth set and the (n - 1)th set along the arrangement direction L of the battery modules 1100 (n is a positive integer greater than 2 and less than or equal to the number of sets of the battery modules 1100).

[0120] In this way, the liquid supply connection pipe section 221b can be between multiple sets of battery modules 1100, and multiple liquid supply branch pipes 222 can respectively connect multiple sets of series connection groups 100a on the opposite sides of the liquid supply connection pipe section 221b along the arrangement direction L of the battery modules 1100; thus, one liquid supply connection pipe section 221b of one liquid supply main pipe 221 can connect multiple (or all) series connection groups 100a at the same time.

[0121] Similarly, in the arrangement direction L of the battery modules 1100, the liquid return connection pipe section 223b is located between any two adjacent sets of battery modules 1100; optionally, the liquid return connection pipe section 223b may be located between the first set and the second set along the arrangement direction L of the battery modules 1100, or the liquid return connection pipe section 223b may be located between the second set and the third set along the arrangement direction L of the battery modules 1100, or the liquid return connection pipe section 223b may be located between the nth set and the (n - 1)th set along the arrangement direction L of the battery modules 1100 (n is a positive integer greater than 2 and less than or equal to the number of sets of the battery modules 1100).

[0122] Among them, the liquid return connection pipe section 223b and the liquid supply connection pipe section 221b may be located between the same two sets of battery modules 1100, that is, the positions of the liquid return connection pipe section 223b and the liquid supply connection pipe section 221b among multiple sets of battery modules 1100 are the same; or the liquid return connection pipe section 223b and the liquid supply connection pipe section 221b may be located between different two sets of battery modules 1100, that is, the positions of the liquid return connection pipe section 223b and the liquid supply connection pipe section 221b among multiple sets of battery modules 1100 are different.

[0123] In this way, the liquid return connection pipe section 223b can be between multiple sets of battery modules 1100, and multiple liquid return branch pipes 224 can respectively connect multiple sets of series connection groups 100a on the opposite sides of the liquid return connection pipe section 223b along the arrangement direction L of the battery modules 1100; thus, one liquid return connection pipe section 223b of one liquid return main pipe 223 can connect multiple (or all) series connection groups 100a at the same time.

[0124] With such an arrangement, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be arranged between any two of the multiple groups of battery modules 1100 along the arrangement direction L of the battery modules 1100, and the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be between any two groups of battery modules 1100 and connect the series connection groups 100a on both sides; when there are multiple series connection groups 100a formed along the arrangement direction L of the battery modules 1100, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are arranged in the middle of the multiple groups of battery modules 1100 and use the liquid supply branch pipeline 222 and the liquid return branch pipeline 224 to connect the pipe bodies of the multiple series connection groups 100a on both sides at the same time. Compared with connecting the multiple series connection groups 100a by using the liquid supply branch pipeline 222 and the liquid return branch pipeline 224 from the outermost ends of the multiple groups of battery modules 1100, the pipe body lengths of the liquid supply branch pipeline 222 and the liquid return branch pipeline 224 are shorter; in this way, the material usage of the liquid supply branch pipeline 222 and the liquid return branch pipeline 224 can be effectively reduced, and thus the cost can be reduced.

[0125] Please refer to Figures 1 to 3 , in some embodiments, along the arrangement direction L of the battery modules 1100, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are located at the same position between the multiple groups of battery modules 1100.

[0126] In this embodiment, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be arranged at the same position along the arrangement direction L of the multiple groups of battery modules 1100, that is, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be located between any two adjacent groups of battery modules 1100 at the same time.

[0127] Exemplarily, in some embodiments, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be located between the first group and the second group along the arrangement direction L of the battery modules 1100 at the same time; or, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be located between the second group and the third group along the arrangement direction L of the battery modules 1100 at the same time; or, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be located between the nth group and the (n - 1)th group along the arrangement direction L of the battery modules 1100 at the same time (n is a positive integer greater than 2 and less than or equal to the number of groups of the battery modules 1100).

[0128] With such an arrangement, arranging the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b at the same position between the multiple groups of battery modules 1100 can further simplify the pipe body layout, that is, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be operated at the same position, so as to reduce the maintenance difficulty.

[0129] Please refer toFigures 1 to 3 , in some embodiments, in the arrangement direction L of the battery assemblies 1100, among multiple groups of battery assemblies 1100 on either side of the liquid supply connection pipe section 221b, the heat exchange components 110 of the battery devices 100 in the same layer in at least two adjacent battery assemblies 1100 are connected in series to form a series connection group 100a; the liquid supply connection pipe section 221b is respectively connected to the corresponding series connection groups 100a through multiple liquid supply branch pipes 222, and the liquid return connection pipe section 223b is respectively connected to the corresponding series connection groups 100a through multiple liquid return branch pipes 224.

[0130] It should be understood that the battery assemblies 1100 are formed by sequentially stacking multiple battery devices 100. Thus, the battery devices 100 in the same layer among multiple groups of battery assemblies 1100 refer to the battery devices 100 in the same stacking layer. Exemplarily, in some embodiments, each group of battery assemblies 1100 may be formed by sequentially stacking eight battery devices 100. Thus, one battery device 100 at the bottom layer of the stack in each group of battery assemblies 1100 is the same layer. Similarly, the battery devices 100 in the second layer, third layer, up to the eighth layer of each group of battery assemblies 1100 are eight-layer structures respectively.

[0131] In this embodiment, in the arrangement direction L of the battery assemblies 1100, among multiple groups of battery assemblies 1100 on either side of the liquid supply connection pipe section 221b, the heat exchange components 110 of the battery devices 100 in the same layer in at least two adjacent battery assemblies 1100 are connected in series; optionally, the heat exchange components 110 of the battery devices 100 in the same layer in every two adjacent battery assemblies 1100 can be connected in series to form a series connection group 100a; or, the heat exchange components 110 of the battery devices 100 in the same layer in all groups of battery assemblies 1100 on either side of the liquid supply connection pipe section 221b can be connected in series to form a series connection group 100a.

[0132] Among them, in the arrangement direction L of the battery assemblies 1100, either side of the liquid supply connection pipe section 221b refers to either one of the two opposite sides of the liquid supply connection pipe section 221b along the arrangement direction L of the battery assemblies 1100; it should be understood that in this embodiment, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are both arranged at the same location between multiple groups of battery assemblies 1100. Thus, either side of the liquid supply connection pipe section 221b and either side of the liquid return connection pipe section 223b refer to the same location.

[0133] With such an arrangement, the liquid supply connection pipe section 221b can be connected to the series connection groups 100a at the opposite ends in the arrangement direction L of the battery module 1100 through the liquid supply branch pipe 222. Similarly, the liquid return connection pipe section 223b can be connected to the series connection groups 100a at the opposite ends in the arrangement direction L of the battery module 1100 through the liquid return branch pipe 224, so as to achieve the purpose of simultaneously connecting multiple series connection groups 100a to the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b between multiple battery modules 1100.

[0134] Please refer to Figures 1 to 3 , in some embodiments, among multiple battery modules 1100 on either side of the liquid supply connection pipe section 221b in the arrangement direction L of the battery module 1100, the heat exchange components 110 of the battery devices 100 in the same layer in each battery module 1100 are connected in series to form a series connection group 100a.

[0135] In this embodiment, in the arrangement direction L of the battery module 1100, the heat exchange components 110 of the battery devices 100 in the same layer in all the battery modules 1100 on either side of the liquid supply connection pipe section 221b can be connected in series to form a series connection group 100a, so that one series connection group 100a can be formed in each layer, that is, in either side of the liquid supply connection pipe section 221b, the number of series connection groups 100a is the same as the number of layers of the battery modules 1100, and the number of all series connection groups 100a on the opposite sides of the liquid supply connection pipe section 221b is twice the number of layers of the battery modules 1100.

[0136] Exemplarily, in some embodiments, the number of battery modules 1100 can be four groups, and each group of battery modules 1100 is formed by stacking eight battery devices 100. The liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be arranged between the second group and the third group of multiple battery modules 1100 along the arrangement direction L, and the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be arranged to extend along the stacking direction of the battery devices 100; among them, the heat exchange components 110 of the battery devices 100 in the same layer in the first group and the second group of multiple battery modules 1100 along the arrangement direction L (that is, two groups of battery modules 1100 on one side of the liquid supply connection pipe section 221b in the arrangement direction L of the battery module 1100) can be respectively connected in series to form eight series connection groups 100a, and at the same time, the heat exchange components 110 of the battery devices 100 in the same layer in the third group and the fourth group of multiple battery modules 1100 along the arrangement direction L (that is, two groups of battery modules 1100 on the other side of the liquid supply connection pipe section 221b in the arrangement direction L of the battery module 1100) can be respectively connected in series to form eight series connection groups 100a, as Figure 1As shown. Thus, in the arrangement direction L of the battery assembly 1100, eight sets of series connection groups 100a are respectively formed on either side of the liquid supply connection pipe section 221b. The liquid supply connection pipe section 221b can be connected to the sixteen sets of series connection groups 100a on the opposite sides of the liquid supply connection pipe section 221b through sixteen liquid supply branch pipelines 222; similarly, the liquid return connection pipe section 223b can be connected to the sixteen sets of series connection groups 100a on the opposite sides of the liquid return connection pipe section 223b through sixteen liquid return branch pipelines 224.

[0137] With such an arrangement, in the arrangement direction L of the battery assembly 1100, multiple sets of battery assemblies 1100 on either side of the liquid supply connection pipe section 221b are connected in series in the same layer to form a set of series connection groups 100a. The series connection groups 100a of each layer can be respectively connected to the liquid supply connection pipe section 221b by using the liquid supply branch pipelines 222, and the series connection groups 100a of each layer can be respectively connected to the liquid return connection pipe section 223b by using the liquid return branch pipelines 224, so as to enable the heat exchange medium to be introduced into multiple sets of series connection groups 100a for heat exchange and cooling operations.

[0138] Please refer to Figures 1 to 3 , in some embodiments, in the arrangement direction L of the battery assembly 1100, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are located in the middle of multiple sets of battery assemblies 1100; the liquid supply connection pipe section 221b is connected to the heat exchange component 110 with the shortest distance between the corresponding series connection groups 100a through the liquid supply branch pipeline 222, and the liquid return connection pipe section 223b is connected to the heat exchange component 110 with the shortest distance between the corresponding series connection groups 100a through the liquid return branch pipeline 224.

[0139] In this embodiment, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are arranged in the middle of multiple sets of battery assemblies 1100 along the arrangement direction L, that is, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are located in the central area of multiple sets of battery assemblies 1100. Exemplarily, when the number of sets of battery assemblies 1100 is an even number, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b can be located at the center of multiple sets of battery assemblies 1100 along the arrangement direction L, that is, in the arrangement direction L of the battery assembly 1100, the number of sets of battery assemblies 1100 on the opposite sides of the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b is the same; when the number of sets of battery assemblies 1100 is an odd number, in the arrangement direction L of the battery assembly 1100, the number of sets of battery assemblies 1100 on the opposite sides of the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b differs by one set.

[0140] Meanwhile, the liquid supply connection pipe segment 221b is connected to the heat exchange component 110 with the shortest distance in the corresponding series connection group 100a through the liquid supply branch pipeline 222. Among the liquid supply connection pipe segment 221b and the corresponding series connection group 100a, the heat exchange component 110 with the shortest distance refers to the heat exchange component 110 with the shortest distance from the liquid supply connection pipe segment 221b in the arrangement direction L of the battery module 1100.

[0141] It should be understood that in the arrangement direction L of the battery module 1100, among multiple groups of battery modules 1100 located on either side of the liquid supply connection pipe segment 221b, the heat exchange components 110 of the battery devices 100 in the same layer in each group of battery modules 1100 are connected in series to form a series connection group 100a. Thus, the heat exchange component 110 of the battery device 100 in a group of battery modules 1100 adjacent to the liquid supply connection pipe segment 221b is the heat exchange component 110 with the shortest distance from the liquid supply connection pipe segment 221b in the corresponding series connection group 100a. Thus, the liquid supply connection pipe segment 221b can be connected to the heat exchange component 110 of the battery device 100 in the adjacent battery module 1100 through the liquid supply branch pipeline 222.

[0142] Similarly, the liquid return connection pipe segment 223b is connected to the heat exchange component 110 with the shortest distance in the corresponding series connection group 100a through the liquid return branch pipeline 224. Among the liquid return connection pipe segment 223b and the corresponding series connection group 100a, the heat exchange component 110 with the shortest distance refers to the heat exchange component 110 with the shortest distance from the liquid return connection pipe segment 223b in the arrangement direction L of the battery module 1100.

[0143] It should be understood that in the arrangement direction L of the battery module 1100, among multiple groups of battery modules 1100 located on either side of the liquid return connection pipe segment 223b, the heat exchange components 110 of the battery devices 100 in the same layer in each group of battery modules 1100 are connected in series to form a series connection group 100a. Thus, the heat exchange component 110 of the battery device 100 in a group of battery modules 1100 adjacent to the liquid return connection pipe segment 223b is the heat exchange component 110 with the shortest distance from the liquid return connection pipe segment 223b in the corresponding series connection group 100a. Thus, the liquid return connection pipe segment 223b can be connected to the heat exchange component 110 of the battery device 100 in the adjacent battery module 1100 through the liquid return branch pipeline 224.

[0144] With such a setting, the pipe body laying lengths of the liquid supply branch pipeline 222 and the liquid return branch pipeline 224 are shorter, so that the pipe body laying can be further simplified and the cost can be reduced.

[0145] Please refer to Figures 1 to 4, in some embodiments, the series connection pipeline 225 includes a series connection liquid supply pipeline 225a, a series connection liquid return pipeline 225b, and a conversion pipeline 225c; a first flow channel 111 and a second flow channel 112 are formed inside the heat exchange component 110; in the series connection group 100a, the first flow channel 111 of the first one of the multiple serially connected heat exchange components 110 communicates with the liquid supply branch pipeline 222, the second flow channel 112 of the first one of the multiple serially connected heat exchange components 110 communicates with the liquid return branch pipeline 224, the first flow channels 111 of two adjacent ones of the multiple serially connected heat exchange components 110 are connected and communicated through the series connection liquid supply pipeline 225a, the second flow channels 112 of two adjacent ones of the multiple serially connected heat exchange components 110 are connected and communicated through the series connection liquid return pipeline 225b, and the first flow channel 111 and the second flow channel 112 of the last one of the multiple serially connected heat exchange components 110 are connected and communicated through the conversion pipeline 225c.

[0146] It should be understood that the first one of the multiple serially connected heat exchange components 110 in the above series connection group 100a refers to the first heat exchange component 110 into which the heat exchange medium derived from the heat management unit 210 enters among all the serially connected heat exchange components 110 in any group of the series connection groups 100a.

[0147] The last one of the multiple serially connected heat exchange components 110 in the above series connection group 100a refers to the last heat exchange component 110 into which the heat exchange medium derived from the heat management unit 210 finally enters among all the serially connected heat exchange components 110 in any group of the series connection groups 100a.

[0148] A first flow channel 111 and a second flow channel 112 are formed inside the heat exchange component 110; it can be understood that the first flow channel 111 and the second flow channel 112 refer to two independent flow channel structures formed inside the heat exchange component 110; the heat exchange medium can flow in the first flow channel 111 and the second flow channel 112 respectively.

[0149] Among them, in the series connection group 100a, the first flow channel 111 of the first one of the multiple serially connected heat exchange components 110 communicates with the liquid supply branch pipeline 222; thus, the liquid supply branch pipeline 222 can introduce the heat exchange medium derived from the heat management unit 210 into the first flow channel 111 of the first heat exchange component 110 in the corresponding series connection group 100a.

[0150] At the same time, in the series group 100a, two adjacent first flow channels 111 of multiple series-connected heat exchange components 110 are connected via a series-connected liquid supply pipeline 225a; thus, after the heat exchange medium flows through the first flow channel 111 of the first heat exchange component 110, it can flow through the first heat exchange flow channel of the second heat exchange component 110 and the first flow channels 111 of the subsequent multiple heat exchange components 110 in sequence through the series-connected liquid supply pipeline 225a; thus, the heat exchange medium can flow through the first flow channel 111 of each heat exchange component 110 in the series group 100a in sequence and perform heat exchange and cooling operations.

[0151] In the series group 100a, the first flow channel 111 and the second flow channel 112 of the last one of the multiple series-connected heat exchange components 110 are connected through the conversion pipeline 225c; thus, when the heat exchange medium flows through the first flow channel 111 of each heat exchange component 110 in the series group 100a in sequence and flows into the first flow channel 111 of the last heat exchange component 110, the heat exchange medium can flow to the second flow channel 112 of the last heat exchange component 110 through the conversion pipeline 225c.

[0152] In the series group 100a, two adjacent second flow channels 112 of multiple series-connected heat exchange components 110 are connected via a series-connected liquid return pipeline 225b; thus, after the heat exchange medium flows through the second flow channel 112 of the last heat exchange component 110, it can flow through the second flow channel 112 of the second-to-last heat exchange component 110 and the second flow channels 112 of multiple subsequent heat exchange components 110 in sequence through the series-connected liquid return pipeline 225b until it flows back to the second flow channel 112 of the first heat exchange component 110; thus, the heat exchange medium in the last heat exchange component 110 can flow back in sequence through the series-connected liquid return pipeline 225b and flow back to the second flow channel 112 of the first heat exchange component 110.

[0153] In the series group 100a, the second flow channel 112 of the first of the multiple series-connected heat exchange components 110 is connected to the liquid return branch pipeline 224; in this way, the heat exchange medium flowing back into the second flow channel 112 of the first heat exchange component 110 can be discharged through the liquid return branch pipeline 224, and then flow through the liquid return connecting pipe section 223b and the liquid return main pipe section 223a in sequence, and then be guided back to the interior of the heat management unit 210 from the liquid return end.

[0154] It should be understood that when the heat exchange medium exported by the heat management unit 210 is introduced into the series connection group 100a through the liquid supply branch pipeline 222, the heat exchange medium will undergo heat exchange and temperature rise every time it flows through the first flow channel 111 of a heat exchange component 110; therefore, in the series connection group 100a, the temperature of the heat exchange medium in the first flow channel 111 of the last heat exchange component 110 among the multiple serially connected heat exchange components 110 is higher than the temperature of the heat exchange medium in the first flow channel 111 of the first heat exchange component 110 among the multiple serially connected heat exchange components 110.

[0155] Similarly, the heat exchange medium in the first flow channel 111 of the last heat exchange component 110 is introduced into the second flow channel 112 through the conversion pipeline 225c, and the heat exchange medium will flow through the second flow channels 112 of each heat exchange component 110 in sequence until it is introduced into the second flow channel 112 of the first heat exchange component 110; therefore, the temperature of the heat exchange medium in the second flow channel 112 of the first heat exchange component 110 among the multiple serially connected heat exchange components 110 is higher than the temperature of the heat exchange medium in the second flow channel 112 of the last heat exchange component 110 among the multiple serially connected heat exchange components 110.

[0156] With such a setting, the comprehensive temperature of the heat exchange medium in each of the serially connected heat exchange components 110 in the series connection group 100a can be balanced, so as to improve the temperature uniformity of the multiple serially connected heat exchange components 110 in the series connection group 100a, thereby being able to improve the overall cooling effect on the battery device 100.

[0157] Please refer to Figures 1 to 4 , in some embodiments, the first flow channel 111 and the second flow channel 112 are arranged adjacent to each other.

[0158] It should be understood that the adjacent arrangement of the first flow channel 111 and the second flow channel 112 means that the first flow channel 111 and the second flow channel 112 can share the same wall surface; the heat exchange medium flowing in the first flow channel 111 and the heat exchange medium flowing in the second flow channel 112 can perform heat exchange through the shared wall surface.

[0159] With such a setting, heat exchange can be formed between the heat exchange medium introduced into the first flow channel 111 and the heat exchange medium flowing back in the second flow channel 112, which can further improve the temperature uniformity of the multiple serially connected heat exchange components 110 in the series connection group 100a, thereby being able to further improve the overall cooling effect on the battery device 100.

[0160] Please refer to Figure 1 , in some embodiments, the heat management unit 210 is of a vertical structure. In the arrangement direction L of the battery modules 1100, the heat management unit 210 is arranged on the outermost side of multiple groups of battery modules 1100; in the gravity direction G, the liquid outlet end and the liquid return end of the heat management unit 210 are located at the bottom side of the heat management unit 210.

[0161] In this embodiment, the thermal management unit 210 adopts a vertical structure; among them, the vertical 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 a vertical direction. Thus, the horizontal space occupied by the vertical thermal management unit 210 is small, and the floor area is small.

[0162] The arrangement direction L of the battery assemblies 1100 refers to the direction in which multiple groups of battery assemblies 1100 are arranged in sequence; for example, when the battery assemblies 1100 are placed in a container, the arrangement direction L of the battery assemblies 1100 can be arranged along the length direction of the container.

[0163] In the gravity direction G, the liquid outlet end and the liquid return end of the thermal management unit 210 are located at the bottom side of the thermal management unit 210; thus, when connecting the liquid outlet end and the liquid return end using the pipeline 220, the pipeline 220 can be connected at the bottom 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 pipeline 220 does not occupy the space in the arrangement direction L of the battery assemblies 1100.

[0164] In the arrangement direction L of the battery assemblies 1100, the thermal management unit 210 is arranged on the outermost side of multiple groups of battery assemblies 1100; thus, the thermal management unit 210 is separately arranged from multiple groups of battery assemblies 1100. The thermal management unit 210 can connect the pipeline 220 through the liquid outlet end and the liquid return end at the bottom side in the gravity direction G, so that the liquid supply main pipe section 221a and the liquid return main pipe section 223a of the pipeline 220 are routed from the bottom side in the gravity direction G to multiple groups of battery assemblies 1100, and the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b of the pipeline 220 respectively extend along the stacking direction of the battery device 100 to between adjacent two groups of battery assemblies 1100, and are connected to the heat exchange components 110 of the battery device 100 in the adjacent battery assemblies 1100 through multiple liquid supply branch pipelines 222 and liquid return branch pipelines 224 respectively.

[0165] With such an arrangement, the thermal management unit 210 can adopt a vertical structure, and the battery assemblies 1100 and the thermal management unit 210 can be separately arranged, that is, the thermal management unit 210 is arranged on the outermost side of multiple groups of battery assemblies 1100. In this way, the influence of the thermal management unit 210 on the pipeline layout inside the battery assemblies 1100 can be reduced; and the thermal management unit 210 can perform the operation of connecting pipes at the bottom side for the liquid outlet end and the liquid return end. In this way, the influence of the space required for the operation of connecting pipes at the liquid outlet end and the liquid return end on the space in the arrangement direction L of the battery assemblies 1100 can be reduced, and the overall space utilization rate can be improved.

[0166] Please refer to Figure 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 any side of the thermal management unit 210.

[0167] In this embodiment, the thermal management unit 210 adopts a horizontal structure; among them, the horizontal 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 thermal management unit 210 is small.

[0168] 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 stacked with multiple groups of battery assemblies 1100, or the thermal management unit 210 can also be arranged on the topmost side of the battery assembly 1100.

[0169] 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 any side of the thermal management unit 210; thus, when connecting the liquid outlet end and the liquid return end with the pipeline 220, the pipeline 220 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 pipeline 220 does not occupy the stacking space of the battery device 100 in the battery assembly 1100.

[0170] 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 any group of battery assemblies 1100 in 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 the liquid outlet end and the liquid return end on any side in the arrangement direction L of the battery assembly 1100. In this way, 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 gravity direction G can be reduced, and the overall space utilization rate can be improved.

[0171] 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.

[0172] In this embodiment, the horizontal thermal management unit 210 is disposed on the top side of the battery assembly 1100 in the direction of gravity G; thus, the thermal management unit 210 is separately disposed from the multiple groups of battery assemblies 1100. The thermal management unit 210 can be connected to the liquid outlet end and the liquid return end on one side in the arrangement direction L of the battery assemblies 1100 through pipelines 220, so that the pipelines 220 are arranged from the outermost side of the multiple groups of battery assemblies 1100 and extend along the direction of gravity G to the bottom side, so that the liquid supply main pipe section 221a and the liquid return main pipe section 223a of the pipelines 220 are routed to the bottommost side of the multiple groups of battery assemblies 1100 along the direction of gravity G, and then are routed along the direction of gravity G through the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b to between two adjacent groups of battery assemblies 1100, and are connected to each series connection group 100a through a plurality of liquid supply branch pipelines 222 and liquid return branch pipelines 224.

[0173] 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 the multiple groups of battery assemblies 1100. In this way, the influence of the thermal management unit 210 on the pipeline arrangement between the heat exchange components 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.

[0174] Please refer to Figure 3 , in some embodiments, in the direction of gravity G, the thermal management unit 210 is located in the middle of the battery assembly 1100.

[0175] In this embodiment, the horizontal thermal management unit 210 is disposed in the middle of the multiple groups of battery assemblies 1100 along the direction of gravity 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 along the direction of gravity 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 along the direction of gravity 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.

[0176] The thermal management unit 210 can be connected to the liquid outlet end and the liquid return end on either side in the arrangement direction L of the battery module 1100 through the pipeline 220, so that the pipeline 220 respectively runs along the gravity direction G from either side in the arrangement direction L of the battery module 1100 to the upper half and the lower half formed by separating each battery module 1100, and then runs along the arrangement direction L of the battery module 1100 to the middle part in the arrangement direction L of multiple groups of battery modules 1100, and runs along the stacking direction of the battery device 100 to between adjacent two groups of battery modules 1100 and is respectively connected to each series connection group 100a.

[0177] With such a setting, the thermal management unit 210 can be arranged in the middle of multiple groups of battery modules 1100, so as to facilitate the connection of the pipeline 220 between the upper half and the lower half of the battery module 1100 by the thermal management unit 210.

[0178] Please refer to Figures 1 to 3 , in some embodiments, the thermal management module 200 further includes a flow control structure (not shown in the figure), and at least part of the liquid supply branch pipeline 222 is provided with a flow control structure.

[0179] The flow control structure refers to a control structure that can adjust the flow rate of the liquid supply branch pipeline 222; through the flow control structure, the flow rate of the heat exchange medium in the corresponding liquid supply branch pipeline 222 can be adjusted to control the flow rate of the heat exchange medium introduced into the corresponding series connection group 100a.

[0180] Optionally, the flow control structure includes but is not limited to structures such as flow valves, bypass valves, and variable diameter pipelines; by arranging the flow control structure on each liquid supply branch pipeline 222, the flow rate of the heat exchange medium in each liquid supply branch pipeline 222 can be adjusted.

[0181] Among them, a flow control structure can be arranged on part of the liquid supply branch pipelines 222; or, a flow control structure can be arranged on each liquid supply branch pipeline 222.

[0182] With such a setting, the flow rate of the heat exchange medium introduced into each liquid supply branch pipeline 222 can be controlled by using the flow control structure to meet the cooling requirements of different series connection groups 100a.

[0183] Please refer to Figures 1 to 3 , in some embodiments, the flow control structure includes a control valve (not shown in the figure), and the control valve is arranged on the liquid supply branch pipeline 222; and / or, the flow control structure includes a control pipeline (not shown in the figure), the control pipeline is connected in series with the liquid supply branch pipeline 222, and the pipe diameter of the control pipeline is different from that of the liquid supply branch pipeline 222.

[0184] Among them, the flow control structure may include a control valve; the control valve refers to a valve structure used to automatically regulate the fluid flow in a pipeline; the working principle of the control valve is usually to automatically adjust the opening of the valve according to the input control signal (such as flow rate, pressure or temperature signal) to meet the set requirements.

[0185] Optionally, the control valve may be, but is not limited to, a pneumatic control valve, an electric control valve, a hydraulic control valve, etc.

[0186] And / or, the flow control structure may include a control pipeline; wherein, the pipe diameter of the control pipeline is different from that of the main liquid supply pipeline 221, and the control pipeline is connected in series with the liquid supply branch pipeline 222. It should be understood that there is a certain influence relationship between the pipe diameter of the pipe body and the flow resistance of the pipe body; when the pipe diameter of the pipe body is larger, the flow resistance of the pipe body will decrease, and when the pipe diameter of the pipe body is smaller, the flow resistance of the pipe body will increase. Thus, the pipe diameters of the control pipelines connected to different liquid supply branch pipelines 222 can be set differently. The overall flow resistance formed by the control pipeline with a pipe diameter smaller than that of the liquid supply branch pipeline 222 in series will increase, and the overall flow resistance formed by the control pipeline with a pipe diameter larger than that of the liquid supply branch pipeline 222 in series will decrease. Therefore, the flow rate differentiation of the heat exchange medium introduced into the corresponding series connection group 100a by each liquid supply branch pipeline 222 can be controlled.

[0187] With such a setting, the flow control structure may include a control valve to achieve the flow control of the liquid supply branch pipeline 222 by using the control valve; and / or, the flow control structure may include a control pipeline, and the control pipeline is set to have a different pipe diameter from that of the liquid supply branch pipe, and the control pipeline is connected in series with the liquid supply branch pipeline 222. Thus, the flow rate differentiation of the heat exchange medium in each liquid supply branch pipeline 222 can be controlled.

[0188] Next, the energy storage device 1000 of the present application will be further described according to specific embodiments.

[0189] Please refer to Figures 1 to 4 , in this embodiment, the energy storage device 1000 includes a thermal management module 200 and a plurality of battery devices 100. The battery device 100 includes a heat exchange component 110. The thermal management module 200 includes a thermal management unit 210 and a pipeline 220. The thermal management unit 210 is connected to the heat exchange component 110 through the pipeline 220.

[0190] A plurality of battery devices 100 are stacked to form a battery assembly 1100. Adjacent first flow channels 111 and second flow channels 112 are formed inside the heat exchange components 110 of each battery device 100, and an outlet 110b and an inlet 110a are respectively provided in the first flow channel 111 and the second flow channel 112.

[0191] The pipeline 220 includes a liquid supply main pipeline 221, a liquid supply branch pipeline 222, a liquid return main pipeline 223, a liquid return branch pipeline 224, and a series connection pipeline 225. The liquid supply main pipeline 221 includes a connected liquid supply main pipe section 221a and a liquid supply connection pipe section 221b, and the liquid supply main pipe section 221a is connected to the liquid outlet end of the thermal management unit 210. The liquid return main pipeline 223 includes a connected liquid return main pipe section 223a and a liquid return connection pipe section 223b, and the liquid return main pipe section 223a is connected to the liquid return end of the thermal management unit 210.

[0192] In the arrangement direction L of the battery assemblies 1100, the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are located at the same position between multiple groups of battery assemblies 1100, and the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b are located in the middle of multiple groups of battery assemblies 1100; that is, in the arrangement direction L of the battery assemblies 1100, the number of groups of battery assemblies 1100 on the relative two sides of the liquid supply connection pipe section 221b and the liquid return connection pipe section 223b is the same.

[0193] Meanwhile, in the arrangement direction L of the battery assemblies 1100, among multiple groups of battery assemblies 1100 on either side of the liquid supply connection pipe section 221b, the heat exchange components 110 of the battery devices 100 located on the same layer in each group of battery assemblies 1100 are connected in series to form a series connection group 100a. The liquid supply connection pipe section 221b is connected to the heat exchange component 110 with the shortest distance between the heat exchange components 110 in the corresponding series connection group 100a through the liquid supply branch pipeline 222, and the liquid return connection pipe section 223b is connected to the heat exchange component 110 with the shortest distance between the heat exchange components 110 in the corresponding series connection group 100a through the liquid return branch pipeline 224.

[0194] The series connection pipeline 225 includes a series connection liquid supply pipeline 225a, a series connection liquid return pipeline 225b, and a conversion pipeline 225c; a first flow channel 111 and a second flow channel 112 are formed inside the heat exchange component 110; in the series connection group 100a, the liquid inlet 110a of the first flow channel 111 of the first of the multiple serially connected heat exchange components 110 is communicated with the liquid supply branch pipeline 222, the liquid outlet 110b of the second flow channel 112 of the first of the multiple serially connected heat exchange components 110 is communicated with the liquid return branch pipeline 224, one of the liquid inlets 110a of the first flow channels 111 of two adjacent ones of the multiple serially connected heat exchange components 110 and the liquid outlet 110b of the other are connected and communicated through the series connection liquid supply pipeline 225a, one of the liquid inlets 110a of the second flow channels 112 of two adjacent ones of the multiple serially connected heat exchange components 110 and the liquid outlet 110b of the other are connected and communicated through the series connection liquid return pipeline 225b, and the liquid outlet 110b of the first flow channel 111 and the liquid inlet 110a of the second flow channel 112 of the last of the multiple serially connected heat exchange components 110 are connected and communicated through the conversion pipeline 225c.

[0195] Please refer to Figure 1 andFigure 5 In addition, an embodiment of the present application further 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.

[0196] 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 connect 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 hydroelectric 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.

[0197] The energy storage system 2000 provided by the embodiment 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.

[0198] Please refer to Figure 1 、 Figure 5 and Figure 6 In addition, an embodiment of the present application further provides a charging network 3000, including a charging pile 3100 and the energy storage device 1000 as described above or the energy storage system 2000 as described above. The energy storage device 1000 is used to provide electric energy for the charging pile 3100.

[0199] An embodiment of the present 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. 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 to an electrical device (such as a vehicle), so as to replenish energy to the electrical device.

[0200] The energy storage device 1000 may be located inside the charging pile 3100 (such as an integrated charging and energy storage machine), or may be located outside the charging pile 3100.

[0201] The charging network 3000 provided by the embodiment of the present application includes the above-mentioned energy storage device 1000 or the above-mentioned energy storage system 2000. Therefore, the cost of the charging network 3000 can be effectively reduced.

[0202] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within 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; and a thermal management module, including a thermal management unit and pipelines, the thermal management unit being connected to each of the heat exchange components through the pipelines; wherein, at least two of the heat exchange components are connected in series through the pipelines to form a series connection group, the number of the series connection groups being at least two groups, and each of the series connection groups is arranged in parallel through the pipelines, and each of the heat exchange components arranged in series includes at least two liquid inlet ports and at least two liquid outlet ports.

2. The energy storage device according to claim 1, wherein: The pipelines include a liquid supply main pipeline, liquid supply branch pipelines, a liquid return main pipeline, liquid return branch pipelines, and series connection pipelines; The liquid supply main pipeline is connected to the liquid outlet end of the thermal management unit, and a plurality of the liquid supply branch pipelines are connected to the liquid supply main pipeline, and each of the plurality of liquid supply branch pipelines is connected to a corresponding one of the series connection groups; The liquid return main pipeline is connected to the liquid return end of the thermal management unit, and a plurality of the liquid return branch pipelines are connected to the liquid return main pipeline, and each of the plurality of liquid return branch pipelines is connected to a corresponding one of the series connection groups; A plurality of the heat exchange components in the series connection group are sequentially connected through the series connection pipelines to form a series connection.

3. The energy storage device according to claim 2, characterized in that: The liquid supply main pipeline includes a liquid supply main pipe section and a liquid supply connection pipe section that are connected in communication, the liquid supply main pipe section being connected to the liquid outlet end of the thermal management unit, and the series connection groups are respectively arranged on opposite sides of the liquid supply connection pipe section, and the liquid supply connection pipe section is correspondingly connected to the series connection groups on both sides through a plurality of the liquid supply branch pipelines; The liquid return main pipeline includes a liquid return main pipe section and a liquid return connection pipe section that are connected in communication, the liquid return main pipe section being connected to the liquid return end of the thermal management unit, and the series connection groups are respectively arranged on opposite sides of the liquid return connection pipe section, and the liquid return connection pipe section is correspondingly connected to the series connection groups on both sides through a plurality of the liquid return branch pipelines.

4. The energy storage device according to claim 3, characterized in that: A plurality of the battery devices are stacked to form multiple groups of battery assemblies; the heat exchange components of the battery devices in at least one group of the battery assemblies are connected in series to form the series connection group; and / or, the heat exchange components of at least one battery device in at least two groups of the battery assemblies are connected in series to form the series connection group; In the arrangement direction of the battery assemblies, the liquid supply connection pipe section and the liquid return connection pipe section are located between any two adjacent groups of the battery assemblies.

5. The energy storage device according to claim 4, wherein: In the arrangement direction of the battery assemblies, the liquid supply connection pipe section and the liquid return connection pipe section are located at the same position between multiple groups of the battery assemblies.

6. The energy storage device according to claim 5, characterized in that: In the arrangement direction of the battery assemblies, among multiple groups of the battery assemblies located on either side of the liquid supply connection pipe section, the heat exchange components of the battery devices in at least two adjacent groups of the battery assemblies located on the same layer are connected in series to form the series connection group; the liquid supply connection pipe section is connected to the corresponding series connection group through a plurality of the liquid supply branch pipelines, and the liquid return connection pipe section is connected to the corresponding series connection group through a plurality of the liquid return branch pipelines.

7. The energy storage device according to claim 6, wherein: In the arrangement direction of the battery assemblies, among multiple groups of the battery assemblies located on either side of the liquid supply connection pipe section, the heat exchange components of the battery devices in each group of the battery assemblies located on the same layer are connected in series to form the series connection group.

8. The energy storage device according to claim 7, wherein: In the arrangement direction of the battery assemblies, the liquid supply connection pipe section and the liquid return connection pipe section are located in the middle of multiple groups of the battery assemblies; The liquid supply connection pipe section is connected to the heat exchange component with the shortest distance between the corresponding series connection groups through the liquid supply branch pipeline, and the liquid return connection pipe section is connected to the heat exchange component with the shortest distance between the corresponding series connection groups through the liquid return branch pipeline.

9. The energy storage device according to any one of claims 2 to 8, characterized in that: The series connection pipeline includes a series connection liquid supply pipeline, a series connection liquid return pipeline, and a conversion pipeline; a first flow channel and a second flow channel are formed inside the heat exchange component; In the series connection group, the first flow channel of the first one of the multiple serially connected heat exchange components communicates with the liquid supply branch pipeline, the second flow channel of the first one of the multiple serially connected heat exchange components communicates with the liquid return branch pipeline, the first flow channels of two adjacent ones of the multiple serially connected heat exchange components are connected through the series connection liquid supply pipeline, the second flow channels of two adjacent ones of the multiple serially connected heat exchange components are connected through the series connection liquid return pipeline, and the first flow channel and the second flow channel of the last one of the multiple serially connected heat exchange components are connected through the conversion pipeline.

10. The energy storage device according to claim 9, characterized in that: The first flow channel and the second flow channel are arranged adjacent to each other.

11. The energy storage device according to any one of claims 4 to 8, characterized in that: The heat management unit is of a vertical structure. In the arrangement direction of the battery assemblies, the heat management unit is arranged on one side of multiple groups of the battery assemblies; 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.

12. The energy storage device according to any one of claims 4 to 8, characterized in that: The heat management unit is of a horizontal structure. In the gravity direction, the heat management unit is located at any position of the battery assemblies; in the arrangement direction of the battery assemblies, the liquid outlet end and the liquid return end of the heat management unit are located at any side of the heat management unit.

13. The energy storage device according to claim 12, characterized in that: In the gravity direction, the heat management unit is located on the top side of multiple groups of the battery assemblies.

14. The energy storage device according to claim 12, characterized in that: In the gravity direction, the heat management unit is located in the middle of the battery assemblies.

15. The energy storage device according to any one of claims 2 to 8, characterized in that: The heat management module further includes a flow control structure, and the flow control structure is arranged on at least part of the liquid supply branch pipeline.

16. The energy storage device according to claim 15, characterized in that: The flow control structure includes a control valve, and the control valve is arranged on the liquid supply branch pipeline; and / or, the flow control structure includes a control pipeline, the control pipeline is connected in series with the liquid supply branch pipeline, and the pipe diameter of the control pipeline is different from that of the liquid supply branch pipeline.

17. 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 16, and the power conversion device is used for electrically connecting a power generation device and the energy storage device.

18. A charging network, characterized in that: It includes a charging pile and the energy storage device according to any one of claims 1 to 16 or the energy storage system according to claim 17, and the energy storage device is used for providing electric energy for the charging pile.

Images