Energy storage system and energy storage power plant

Abstract

The application relates to the technical field of energy storage, in particular to an energy storage system and an energy storage power station, the energy storage system comprising a heat management module, an energy storage prefabricated cabin and an energy storage current conversion and voltage boosting integrated cabin; wherein the heat management module is arranged in the energy storage prefabricated cabin or the energy storage current conversion and voltage boosting integrated cabin, and the energy storage prefabricated cabin and the energy storage current conversion and voltage boosting integrated cabin share the heat management module; the outer walls of the cabin bodies of the energy storage prefabricated cabin and the energy storage current conversion and voltage boosting integrated cabin are respectively reserved with external heat exchange interfaces, and the external heat exchange interfaces are used for connecting the heat management module through connecting pipelines. The device cost is reduced, and the land occupation area is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage, and more particularly to an energy storage system and an energy storage power station. Background Technology

[0002] Traditional energy storage systems typically require cables to connect the energy storage devices and the power conversion system (PCS), and each device has a separate thermal management system, resulting in high energy consumption, high cost, and large footprint. Utility Model Content

[0003] This application provides an energy storage system and an energy storage power station, which can solve the problems of high energy consumption, high cost and large footprint of traditional energy storage systems.

[0004] To achieve the above objectives, this application adopts the following technical solution: Firstly, an energy storage system is provided, comprising: Thermal management module; Prefabricated energy storage compartment; And, an integrated energy storage, converter, and booster cabin; The thermal management module is located in the prefabricated energy storage compartment or the integrated energy storage converter and booster compartment, and the prefabricated energy storage compartment and the integrated energy storage converter and booster compartment share the thermal management module. The outer walls of the prefabricated energy storage compartment and the integrated energy storage converter and booster compartment are respectively reserved with external heat exchange interfaces, which are used to connect the thermal management module through connecting pipelines.

[0005] In the technical solution of this application embodiment, each compartment of the energy storage system (i.e., the prefabricated energy storage compartment and the integrated energy storage converter and booster compartment) shares a thermal management module. The thermal management module cools or heats the prefabricated energy storage compartment and the integrated energy storage converter and booster compartment, reducing equipment costs. Furthermore, the thermal management module is located in either the prefabricated energy storage compartment or the integrated energy storage converter and booster compartment, reducing the floor space required. When the prefabricated energy storage compartment and the integrated energy storage converter and booster compartment are respectively in need of cooling and heating, they can also exchange energy through the thermal management module, thus eliminating the need for the thermal management module to provide all the energy to meet the different thermal management needs of each compartment, achieving the goal of energy saving.

[0006] In some embodiments, the number of energy storage prefabricated modules is two or more, and the thermal management module is installed in any one of the energy storage prefabricated modules, or the thermal management module is installed in the integrated energy storage converter and booster module.

[0007] In the technical solution of this application embodiment, there are two or more energy storage prefabricated modules, and each energy storage prefabricated module can be controlled to work in the same or different states according to the power (input or output) request, which can meet a wide range of power requests; the integrated energy storage converter booster module and multiple energy storage prefabricated modules share a thermal management module, which saves equipment costs and reduces the floor space.

[0008] In some embodiments, the energy storage prefabricated module includes a first energy storage prefabricated module and a second energy storage prefabricated module, wherein the power types configured in the first energy storage prefabricated module and the second energy storage prefabricated module are different.

[0009] In the technical solution of this application embodiment, the energy storage prefabricated modules are configured with different power types. The input / output power (i.e., output power) can be different depending on the power type, and the range of available battery state of charge can also be different. Therefore, the system can control the two types of energy storage prefabricated modules to output power individually or simultaneously according to the output power and power request of different energy storage prefabricated modules, so as to meet the different power requests with different output schemes. Compared with energy storage prefabricated modules with a single power type, the output power range of the energy storage system is broadened, as well as the range of available battery state of charge under various operating conditions, and the equivalent cycle number is reduced.

[0010] In some embodiments, the first energy storage prefabricated module and the second energy storage prefabricated module are arranged with their backs facing each other, and are respectively arranged laterally adjacent to the integrated energy storage converter and booster module; a first gap is reserved between any two energy storage prefabricated modules, and between any energy storage prefabricated module and the integrated energy storage converter and booster module.

[0011] In the technical solution of this application embodiment, the arrangement of the various compartments of the energy storage system saves floor space and reduces the length of conductive cables and thermal management connecting pipes between the compartments, thereby reducing equipment costs while improving heat exchange efficiency and power transmission efficiency.

[0012] In some embodiments, the distance of the first gap ranges from 50 mm to 200 mm.

[0013] In the technical solution of this application embodiment, the gap between each compartment of the energy storage system is configured between 50 mm and 200 mm. This gap distance is conducive to heat exchange between the compartments and between the compartments and the external environment. At the same time, it can save conductive cables and thermal management connection pipes, reduce equipment costs, and improve heat exchange efficiency and power transmission efficiency.

[0014] In some embodiments, the energy storage prefabricated module includes: a third energy storage prefabricated module, wherein the third energy storage prefabricated module is configured with two or more power types; a second gap is reserved between the third energy storage prefabricated module and the integrated energy storage converter booster module on the side.

[0015] In the technical solutions of this application embodiment, the output power of different power types can be different, and the range of available battery state of charge can also be different. Therefore, configuring two or more power types in an energy storage prefabricated cabin can broaden its output power range. Compared with an energy storage prefabricated cabin with a single power type, it can meet a wider range of power requests, that is, broaden the range of available battery state of charge and reduce the equivalent cycle number.

[0016] In some embodiments, the distance of the second gap ranges from 50 mm to 200 mm.

[0017] In the technical solution of this application embodiment, the gap between each compartment of the energy storage system is configured between 50 mm and 200 mm. This gap distance is conducive to heat exchange between the compartments and between the compartments and the external environment. At the same time, it can save conductive cables and thermal management connection pipes, reduce equipment costs, and improve heat exchange efficiency and power transmission efficiency.

[0018] In some embodiments, the thermal management module includes a cooling module, and the external heat dissipation interface includes an external cooling pipe interface, which is connected to the cooling module via a connecting pipe. The energy storage system also includes: a first flow path switching valve, which is used to switch the cooling flow path of the cooling module to a first flow path or a second flow path; The first flow path is from the cooling module to the energy storage prefabricated compartment; The second flow path is from the cooling module to the integrated energy storage, converter, and booster compartment.

[0019] In the technical solution of this application embodiment, the energy storage system shares the same cooling module among its various compartments, and the refrigerant is delivered to the corresponding compartment for cooling as needed through the first flow path switching valve.

[0020] In some embodiments, the thermal management module includes a heating module, and the external heat exchange interface includes an external heating pipe interface, which is connected to the heating module via a connecting pipe. The energy storage system also includes: a second flow path switching valve, and the first flow path switching valve is used to switch the heating flow path of the heating module to a third flow path or a fourth flow path; The third flow path is from the heating module to the energy storage prefabricated compartment; The fourth flow path is the flow path from the heating module to the integrated energy storage, converter, and booster compartment.

[0021] In the technical solution of this application embodiment, the energy storage system shares the same heating module among its various compartments, and the refrigerant is delivered to the corresponding compartment for heating as needed through the first flow path switching valve.

[0022] In some embodiments, the energy storage system further includes: The third flow path switching valve is installed in the heat exchange circuit from the integrated energy storage converter and booster compartment to the prefabricated energy storage compartment. The third flow path switching valve is used to connect or disconnect the heat exchange circuit. When the heat exchange circuit is connected, the heat from the integrated energy storage converter and booster chamber is transferred to the prefabricated energy storage chamber.

[0023] In the technical solution of this application embodiment, the integrated energy storage converter and booster compartment and the prefabricated energy storage compartment are also provided with a heat exchange circuit, and the heat exchange circuit is connected or disconnected through a third flow path switching valve. When the prefabricated energy storage compartment needs to be heated and the integrated energy storage converter and booster compartment needs to be cooled, the heat of the integrated energy storage converter and booster compartment can be directly used to heat the prefabricated energy storage compartment, thereby reducing the energy consumption of the thermal management module.

[0024] In some embodiments, a cabin branch shut-off valve is configured at each external heat exchange interface, wherein the cabin branch shut-off valve is used to disconnect the circuit between the corresponding external heat exchange interface and the thermal management module.

[0025] In the technical solution of this application embodiment, by configuring a compartment branch shut-off valve at each external heat exchange interface, the flow of refrigerant can be stopped when the system is under maintenance or the thermal management module fails, thereby improving safety.

[0026] Secondly, an energy storage power station is provided, including the aforementioned energy storage system.

[0027] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions of the first aspect mentioned above, and will not be repeated here.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the energy storage system provided in the first embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the energy storage system provided in the second embodiment of this application.

[0031] Figure 3This is a schematic diagram of the energy storage system provided in the third embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the energy storage system provided in the fourth embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the energy storage system provided in the fifth embodiment of this application.

[0034] Figure 6 This is a schematic diagram of the energy storage system provided in the sixth embodiment of this application.

[0035] Figure 7 This is a schematic diagram of the energy storage system provided in the seventh embodiment of this application.

[0036] Figure 8 This is a schematic diagram of the energy storage system provided in the eighth embodiment of this application.

[0037] Figure 9 This is a schematic diagram of the energy storage system provided in the ninth embodiment of this application. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent after understanding this application. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent after understanding this application, except for operations that must be performed in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0039] The embodiments described in the following examples of this application do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0040] The following is an illustrative description of the scenarios that may be involved in the embodiments of this application.

[0041] Prefabricated energy storage modules are highly centralized energy storage devices formed by placing multiple battery boxes inside a module. They offer advantages such as short construction time, easy relocation, and small footprint, and have been increasingly used in various large-scale projects in recent years, including energy storage power stations with energy storage battery swapping systems, energy storage charging systems, and energy storage systems for peak shaving and frequency regulation. A battery box includes a casing and battery clusters housed within it. A battery cluster is formed by combining multiple individual battery cells, which can be connected in series or parallel. It should be noted that a prefabricated energy storage module can include multiple battery boxes, which can be arranged sequentially along the width of the module; conversely, a single battery box can contain multiple battery clusters, which can be arranged along the height of the casing. Energy storage systems typically include multiple prefabricated energy storage modules.

[0042] In some scenarios, energy storage systems with grid-type energy storage requirements often separate the prefabricated energy storage module and the integrated energy storage converter and booster module (or PCS integrated module), increasing the area occupied and the cable length between the various modules of the energy storage system (i.e., the prefabricated energy storage module and the integrated energy storage converter and booster module), resulting in high energy consumption and increased costs. In addition, the prefabricated energy storage module and the integrated energy storage converter and booster module are equipped with separate thermal management systems, increasing the heat exchange pipelines between the various modules of the energy storage system, which also increases costs.

[0043] To reduce the footprint, cost, and energy consumption of energy storage systems with prefabricated energy storage compartments, this application provides an energy storage system with a shared thermal management system.

[0044] See Figure 1 and Figure 2 These are schematic diagrams of the modules of the energy storage system provided in two embodiments of this application. The energy storage system includes: a thermal management module 100, an energy storage prefabricated cabin 200, and an integrated energy storage converter and booster cabin 300.

[0045] The thermal management module 100 is located in either the prefabricated energy storage compartment 200 or the integrated energy storage converter and booster compartment 300, and both the prefabricated energy storage compartment 200 and the integrated energy storage converter and booster compartment 300 share the thermal management module 100. The outer walls of both the prefabricated energy storage compartment 200 and the integrated energy storage converter and booster compartment 300 have pre-reserved external heat exchange interfaces 250, which are used to connect to the thermal management module 100 via connecting pipes.

[0046] Figure 1 In the example, the thermal management module 100 is located in the integrated energy storage, converter, and booster compartment 300. Figure 2 In the example, the thermal management module 100 is located in the energy storage prefabricated compartment 200. Figure 1 , 2 In the example, the energy storage prefabricated module 200 is one unit.

[0047] The thermal management module 100 is, for example, a cooling system (or heat exchange system) including refrigerant, connecting pipes, multiple control valves, and heat exchange equipment. In one example, the thermal management module 100 can be referenced from an air conditioning system architecture. Internal heat exchange pipes 150 are arranged inside the energy storage prefabricated compartment 200 and the energy storage converter and booster integrated compartment 300, respectively. The internal heat exchange pipes 150 are connected to the external heat exchange interface 250, thereby connecting to the thermal management module 100. This allows all compartments of the energy storage system (i.e., the energy storage prefabricated compartment 200 and the energy storage converter and booster integrated compartment 300) to share a single thermal management module 100, reducing equipment costs. The external heat exchange interface 250 includes an inlet and an outlet. The two ends of the internal heat exchange pipes 150 are connected to the inlet and outlet of the external heat exchange interface 250. The inlet of the external heat exchange interface 250 is used for refrigerant to flow in, and the outlet is used for refrigerant to flow out to the thermal management module 100.

[0048] The thermal management module 100 is installed in the energy storage prefabricated compartment 200 or the energy storage converter and booster integrated compartment 300, reducing the floor space. When the energy storage prefabricated compartment 200 and the energy storage converter and booster integrated compartment 300 are respectively in need of cooling and heating, they can also exchange energy through the thermal management module 100 to achieve heat exchange. Therefore, it is not necessary for the thermal management module 100 to provide all the energy to meet the different thermal management needs of different compartments, thus achieving the purpose of energy saving.

[0049] See Figure 3 and Figure 4 These are schematic diagrams of the energy storage system modules provided in two embodiments of this application. In some embodiments, the number of energy storage prefabricated modules 200 is two or more, and the thermal management module 100 is disposed in any one of the energy storage prefabricated modules 200, or the thermal management module 100 is disposed in the integrated energy storage converter and booster module 300.

[0050] Figure 3 and Figure 4 In this example, there are two energy storage prefabricated modules 200. In other embodiments, there may be three or more energy storage prefabricated modules 200. Figure 3 In the example, the thermal management module 100 is located in the integrated energy storage, converter, and booster compartment 300. Figure 4 In the example, the thermal management module 100 is located in the energy storage prefabricated compartment 200.

[0051] In the technical solution of this application embodiment, there are two or more energy storage prefabricated modules 200. Each energy storage prefabricated module 200 can be controlled to work in the same or different states according to the power (input or output) request, which can meet a wide range of power requests. The energy storage converter booster integrated module 300 and multiple energy storage prefabricated modules 200 share a thermal management module 100, which saves equipment costs and reduces the floor space.

[0052] See also Figure 3 In some embodiments, the energy storage prefabricated module 200 includes a first energy storage prefabricated module 201 and a second energy storage prefabricated module 202, wherein the power types configured in the first energy storage prefabricated module 201 and the second energy storage prefabricated module 202 are different.

[0053] For example, the first energy storage prefabricated module 201 is equipped with a power source including lithium-ion batteries, while the second energy storage prefabricated module 202 is equipped with a power source including sodium-ion batteries. The input / output power (i.e., output power) can differ depending on the power source type. In the higher power output range, the first energy storage prefabricated module 201 equipped with lithium-ion batteries and the second energy storage prefabricated module 202 equipped with sodium-ion batteries can output power together, or the second energy storage prefabricated module 202 can output power alone. In the higher power output range, the first energy storage prefabricated module 201 outputs power alone.

[0054] In some embodiments, the energy storage system has a built-in computer terminal or is connected to an external computer terminal. This computer terminal runs an artificial intelligence agent (AI Agent). Based on input operating condition predictions or scheduling plans, the AI ​​Agent simulates and calculates the energy storage output power curve and the battery state of charge (SoC) curve. The AI ​​Agent simulates and calculates different output schemes to find the optimal output scheme for the system, maximizing the available SoC range and minimizing the equivalent cycle number under that operating condition. The AI ​​Agent provides the optimal output scheme, and the energy management system (EMS) of the energy storage system controls the energy storage system output according to the optimal output scheme provided by the AI ​​Agent, combined with the operating condition predictions or scheduling plans. Compared to a prefabricated energy storage module 200 with a single power source type, this expands the output power range of the energy storage system and the available battery SoC range under various operating conditions, while reducing the equivalent cycle number.

[0055] See also Figure 3 and Figure 4 In some embodiments, the first energy storage prefabricated module 201 and the second energy storage prefabricated module 202 are arranged with their backs facing each other and are laterally adjacent to the energy storage converter and booster integrated module 300, respectively; a first gap H1 is reserved between any two energy storage prefabricated modules 200 and between any energy storage prefabricated module 200 and the energy storage converter and booster integrated module 300 laterally.

[0056] It is understandable that when the two prefabricated energy storage modules 200 are arranged with their backs facing each other, the doors of the two prefabricated energy storage modules 200 should also be back to back, or the doors should be on the side away from the integrated energy storage converter and booster module 300.

[0057] In the technical solution of this application embodiment, the arrangement of the various compartments of the energy storage system saves floor space and reduces the length of conductive cables and thermal management connecting pipes between the compartments, thereby reducing equipment costs while improving heat exchange efficiency and power transmission efficiency.

[0058] In some embodiments, the distance of the first gap H1 ranges from 50 mm to 200 mm. Configuring the gaps between the various compartments of the energy storage system to be between 50 mm and 200 mm facilitates heat exchange between the compartments and between the compartments and the external environment. This also saves on conductive cables and thermal management connecting pipes, reducing equipment costs while improving heat exchange efficiency and power transmission efficiency.

[0059] See Figure 5 This is a schematic diagram of the energy storage system provided in the fifth embodiment of this application. Figure 5 As shown, in some embodiments, the energy storage prefabricated compartment 200 includes: a third energy storage prefabricated compartment 203, wherein the third energy storage prefabricated compartment 203 is configured with two or more power types; a second gap H2 is reserved between the third energy storage prefabricated compartment 203 and the energy storage converter booster integrated compartment 300 on the side.

[0060] The third energy storage prefabricated module 203 includes at least one first battery box 210 and at least one second battery box 220. Each first battery box 210 is equipped with a lithium-ion battery, and each second battery box 220 is equipped with a sodium-ion battery. The output power and available battery state-of-charge range can vary depending on the power source type. Furthermore... Figure 5 In this example, there is one energy storage prefabricated module 200. In other embodiments, the third energy storage prefabricated module 203 may be at least one of two or more energy storage prefabricated modules 200.

[0061] In some embodiments, the AI ​​Agent simulates and calculates the energy storage output power curve and battery state-of-charge curve based on the input operating condition prediction or scheduling plan. The AI ​​Agent simulates and calculates different output schemes to find the optimal output scheme for the system, maximizing the available SoC range and minimizing the equivalent cycle number under that operating condition. The AI ​​Agent provides the optimal output scheme, and the EMS of the energy storage system controls the energy storage system output according to the optimal output scheme provided by the AI ​​Agent, combined with the operating condition prediction or scheduling plan. Compared to a single-power-type prefabricated energy storage module 200, this expands the output power range of the energy storage system and the available battery state-of-charge range under various operating conditions, while reducing the equivalent cycle number.

[0062] In some embodiments, the distance of the second gap H2 ranges from 50 mm to 200 mm. Configuring the gaps between the various compartments of the energy storage system to be between 50 mm and 200 mm facilitates heat exchange between the compartments and between the compartments and the external environment. This also saves on conductive cables and thermal management connecting pipes, reducing equipment costs while improving heat exchange efficiency and power transmission efficiency.

[0063] See Figure 6 This is a schematic diagram of the energy storage system provided in the sixth embodiment of this application. Figure 1 and Figure 6 As shown, in some embodiments, the thermal management module 100 includes a cooling module, and the external heat dissipation interface 250 includes an external cooling pipe interface 251, which is connected to the cooling module through a connecting pipe.

[0064] The energy storage system also includes: a first flow path switching valve 400, which is used to switch the cooling flow path of the cooling module to a first flow path 410 or a second flow path 420; the first flow path 410 is the flow path from the cooling module to the energy storage prefabricated cabin 200; the second flow path 420 is the flow path from the cooling module to the energy storage converter booster integrated cabin 300.

[0065] It should be noted that the external cooling pipe interface 251 includes an inlet and an outlet. Each compartment is equipped with an inlet and an outlet of the external cooling pipe interface 251, and both ends of the internal heat exchange pipe 150 are connected to the inlet and outlet of the external cooling pipe interface 251. In some examples, the cooling module switches the flow path according to the cooling requirements through the first flow path switching valve 400, which can cool and dissipate heat from each compartment in a time-sharing manner.

[0066] The energy storage system shares the same cooling module among its various compartments. The first flow path switching valve 400 delivers refrigerant to the corresponding compartment for cooling as needed, saving costs.

[0067] See Figure 7 This is a schematic diagram of the energy storage system provided in the seventh embodiment of this application. Figure 1 and Figure 7 As shown, in some embodiments, the thermal management module 100 includes a heating module, and the external heat dissipation interface 250 includes an external heating pipe interface 252, which is connected to the heating module through a connecting pipe. The energy storage system also includes a second flow path switching valve 500, which is used to switch the heating flow path of the heating module 102 to a third flow path 510 or a fourth flow path 520; the third flow path 510 is the flow path from the heating module to the energy storage prefabricated cabin 200; the fourth flow path 520 is the flow path from the heating module to the energy storage converter booster integrated cabin 300.

[0068] It should be noted that the external heating pipe interface 252 includes an input port and an output port. Each compartment is equipped with an input port and an output port of the external heating pipe interface 252, and both ends of the internal heat exchange pipeline 150 are connected to the input port and the output port of the external heating pipe interface 252. In some examples, the heating module can switch the flow path according to the heating requirements through the second flow path switching valve 500, which can cool and dissipate heat from each compartment in a time-sharing manner.

[0069] In the technical solution of this application embodiment, the energy storage system shares the same heating module among its various compartments, and the refrigerant is delivered to the corresponding compartment for heating as needed through the second flow path switching valve 500.

[0070] See Figure 8 This is a schematic diagram of the energy storage system provided in the eighth embodiment of this application. Figures 6 to 8 As shown, in some embodiments, the thermal management module 100 includes a refrigeration system, which includes a condenser 101, a compressor, an evaporator 103, and an expansion valve 104 connected in sequence. The evaporator is provided with a refrigerant inlet and a refrigerant outlet, which are connected to each compartment via connecting pipes. It can be understood that this refrigeration system constitutes the cooling module of the thermal management module 100.

[0071] In some embodiments, the thermal management module 100 further includes a heater 105, which is connected to the refrigerant inlet and refrigerant outlet respectively. The heater 105 is used to assist the refrigeration system operating in heating mode in heating the compartments when heating is required, thereby increasing the heating power. It can be understood that the heater 105 and the refrigeration system constitute the heating module of the thermal management module 100.

[0072] In some embodiments, combined with Figures 6 to 8 The first flow path switching valve 400 and the second flow path switching valve 500 are the same set of flow path switching valves, the first flow path 410 and the third flow path 510 are the same flow path, and the second flow path 420 and the fourth flow path 520 are the same flow path.

[0073] The flow path switching valve includes a first multi-way valve 451 and a second multi-way valve 452, which are respectively connected to the refrigerant inlet and the refrigerant outlet. The first multi-way valve 451 is connected to the refrigerant outlet, the first flow path 410, and the second flow path 420 through connecting pipes, and the second multi-way valve 452 is connected to the refrigerant inlet, the first flow path 410, and the second flow path 420 through connecting pipes, thereby delivering refrigerant for heating or cooling as needed. Figure 8In the example, the energy storage system includes two prefabricated energy storage compartments 200 and one integrated energy storage converter and booster compartment 300. Therefore, the first multi-way valve 451 and the second multi-way valve 452 are both four-way valves used to control the flow in three paths. In other examples, the energy storage system includes one prefabricated energy storage compartment 200 and one integrated energy storage converter and booster compartment 300. Therefore, the first multi-way valve 451 and the second multi-way valve 452 are both three-way valves used to control the flow in two paths. It can be understood that the selection of multi-way valves is based on the number of flow paths.

[0074] In some embodiments, the energy storage system further includes a third flow path switching valve 600, which is disposed in the heat exchange circuit from the integrated energy storage converter and booster chamber 300 to the prefabricated energy storage chamber 200. The third flow path switching valve 600 is used to connect or disconnect the heat exchange circuit. When the heat exchange circuit is connected, the heat from the integrated energy storage converter and booster chamber 300 is transferred to the prefabricated energy storage chamber 200.

[0075] It should be noted that when there are multiple prefabricated energy storage modules 200, a third flow path switching valve 600 is also installed in the heat exchange circuit between adjacent prefabricated energy storage modules 200, see [link to relevant documentation]. Figure 8 In this embodiment, the heat exchange circuit is connected between the output port of the external heat exchange interface 250 of one compartment and the input port of the external heat exchange interface 250 of another compartment.

[0076] In the technical solution of this application embodiment, the energy storage converter booster integrated chamber 300 and the energy storage prefabricated chamber 200 are also provided with a heat exchange circuit, and the heat exchange circuit is connected or disconnected through the third flow path switching valve 600. Under the working condition that the energy storage prefabricated chamber 200 needs to be heated and the energy storage converter booster integrated chamber 300 needs to be cooled, the heat of the energy storage converter booster integrated chamber 300 can be directly used to heat up the energy storage prefabricated chamber 200, thereby reducing the energy consumption of the thermal management module 100.

[0077] As an example of a cooling operation, the Battery Management System (BMS) of each prefabricated energy storage module 200 individually collects its own battery temperature. The BMS determines whether to send a cooling activation request command to the thermal management module 100 based on the battery temperature. The temperature sensor of the integrated energy storage converter-boost module 300 collects the temperature of high-power devices, such as the temperature of the inverter's semiconductor transistors. The controller of the integrated energy storage converter-boost module 300 determines whether to send a cooling activation request command to the thermal management module 100 based on the semiconductor transistor temperature. Upon receiving the cooling activation request command from the BMS and the controller of the integrated energy storage converter-boost module 300, the thermal management module 100 activates the cooling system, controlling the first multi-way valve 451 and the second multi-way valve 452 to perform time-sharing cooling of each module of the energy storage system every preset minutes.

[0078] As an example of a cooling operation, the thermal management module 100 receives a heating activation request command from the BMS and transfers the heat from the integrated energy storage converter and booster chamber 300 to each prefabricated energy storage chamber 200 by controlling the third flow path switching valve 600. If the heating efficiency is insufficient, the cooling system can be activated to generate heat, and the first multi-way valve 451 and the second multi-way valve 452 can be controlled to alternately heat each prefabricated energy storage chamber 200 every preset minutes, or to heat each prefabricated energy storage chamber 200 simultaneously.

[0079] See Figure 9 This is a schematic diagram of the energy storage system provided in the ninth embodiment of this application. In some embodiments, a cabin branch shut-off valve 700 is configured at each external heat exchange interface 250, wherein the cabin branch shut-off valve 700 is used to disconnect the circuit between the corresponding external heat exchange interface 250 and the thermal management module 100.

[0080] In the technical solution of this application embodiment, by configuring the cabin branch shut-off valve 700 at each external heat exchange interface 250, the flow of refrigerant can be stopped during maintenance of the energy storage converter booster integrated cabin 300, energy storage prefabricated cabin 200, connecting pipelines, external heat exchange interface 250, thermal management module 100, etc., thereby improving safety.

[0081] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0082] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0084] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0085] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An energy storage system, characterized by, include: Thermal management module; Prefabricated energy storage compartment; And, an integrated energy storage, converter, and booster cabin; The thermal management module is located in the energy storage prefabricated compartment or the energy storage converter and booster integrated compartment, and the energy storage prefabricated compartment and the energy storage converter and booster integrated compartment share the thermal management module. The outer walls of the prefabricated energy storage compartment and the integrated energy storage converter and booster compartment are respectively provided with external heat exchange interfaces, which are used to connect to the thermal management module through connecting pipelines.

2. The energy storage system of claim 1, wherein, The number of energy storage prefabricated modules is two or more, and the thermal management module is installed in any one of the energy storage prefabricated modules, or the thermal management module is installed in the integrated energy storage converter and booster module.

3. The energy storage system according to claim 1 or 2, characterized in that, The energy storage prefabricated module includes a first energy storage prefabricated module and a second energy storage prefabricated module, wherein the power sources configured in the first energy storage prefabricated module and the second energy storage prefabricated module are different.

4. The energy storage system of claim 3, wherein, The first energy storage prefabricated module and the second energy storage prefabricated module are arranged with their backs facing each other, and are respectively arranged laterally adjacent to the integrated energy storage converter booster module; A first gap is reserved between any two of the energy storage prefabricated modules, and laterally between any one of the energy storage prefabricated modules and the energy storage converter booster module.

5. The energy storage system of claim 4, wherein, The distance of the first gap ranges from 50 mm to 200 mm.

6. The energy storage system of claim 1 or 2, wherein, The energy storage prefabricated module includes: a third energy storage prefabricated module, wherein the third energy storage prefabricated module is configured with two or more types of power sources; A second gap is reserved between the third energy storage prefabricated compartment and the integrated energy storage converter booster compartment.

7. The energy storage system according to claim 6, characterized in that, The distance of the second gap ranges from 50 mm to 200 mm.

8. The energy storage system of claim 1 or 2, wherein, The thermal management module includes a cooling module, and the external heat dissipation interface includes an external cooling pipe interface, which is connected to the cooling module via a connecting pipe. The energy storage system further includes: a first flow path switching valve, which is used to switch the cooling flow path of the cooling module to a first flow path or a second flow path; The first flow path is the flow path from the cooling module to the energy storage prefabricated compartment; The second flow path is the flow path from the cooling module to the integrated energy storage, converter, and booster compartment.

9. The energy storage system according to claim 1 or 2, characterized in that, The thermal management module includes a heating module, and the external heat exchange interface includes an external heating tube interface, which is connected to the heating module via a connecting pipe. The energy storage system further includes: a second flow path switching valve, which is used to switch the heating flow path of the heating module to a third flow path or a fourth flow path; The third flow path is the flow path from the heating module to the energy storage prefabricated compartment; The fourth flow path is the flow path from the heating module to the integrated energy storage, converter, and booster chamber.

10. The energy storage system of claim 9, wherein, The energy storage system also includes: The third flow path switching valve is installed in the heat exchange circuit from the integrated energy storage converter and booster compartment to the prefabricated energy storage compartment. The third flow path switching valve is used to connect or disconnect the heat exchange circuit. When the heat exchange circuit is connected, the heat from the integrated energy storage converter and booster chamber is transferred to the prefabricated energy storage chamber.

11. The energy storage system according to claim 1 or 2, characterized in that, Each of the external heat exchange interfaces is equipped with a cabin branch shut-off valve, wherein the cabin branch shut-off valve is used to disconnect the circuit between the corresponding external heat exchange interface and the thermal management module.

12. An energy storage power plant characterized by, Includes the energy storage system as described in any one of claims 1 to 11.

Images