A liquid cooling system, energy storage device, energy storage system and charging network

Abstract

The application provides a liquid cooling system, an energy storage device, an energy storage system and a charging network. The liquid cooling system has a refrigerant circuit, and further comprises a thermal management module, a heat dissipation module and a fluorine pump module. The thermal management module comprises two liquid cooling interfaces and two refrigeration interfaces, the two liquid cooling interfaces are used for flowing a first working medium therebetween, the two refrigeration interfaces are used for flowing a second working medium therebetween, the two liquid cooling interfaces are used for connecting a battery module, and the two refrigeration interfaces are connected in series to the refrigerant circuit; the heat dissipation module comprises two heat dissipation interfaces, and the two heat dissipation interfaces are connected in series to the refrigerant circuit; the fluorine pump module comprises two fluorine pump interfaces, and the two fluorine pump interfaces are connected in series to the refrigerant circuit, and the fluorine pump module is connected between the thermal management module and the heat dissipation module. Through the modular structure design of the modular liquid cooling system, the energy storage device can be subjected to efficient and energy-saving thermal management.

Description

Technical Field

[0001] This application relates to the field of thermal management technology for energy storage devices, and in particular to a liquid cooling system, energy storage device, energy storage system, and charging network. Background Technology

[0002] With the continuous development of green energy technologies, energy storage devices that can store and release electrical energy are widely used. Energy storage batteries generate a large amount of heat during charging and discharging. If this heat cannot be dissipated in time, overheating can pose safety risks such as fire and explosion. Therefore, it is necessary to implement thermal management for energy storage batteries to ensure their safety and stability.

[0003] Currently, traditional air-cooling methods are no longer sufficient to meet the efficiency and space requirements for battery thermal management in energy storage devices. Summary of the Invention

[0004] This application provides a liquid cooling system, energy storage device, energy storage system and charging network. Through the modular structure design of the modular liquid cooling system, the energy storage device can achieve efficient and energy-saving thermal management.

[0005] In a first aspect, this application provides a liquid cooling system for thermal management of battery modules in energy storage devices. The liquid cooling system has a refrigerant circuit through which a second working fluid flows. The system also includes a thermal management module, a heat dissipation module, and a refrigerant pump module. The thermal management module includes two liquid cooling interfaces and two cooling interfaces. A first working fluid flows between the two liquid cooling interfaces, and the two interfaces are used to connect to a load, forming a coolant circuit between the thermal management module and the load for the first working fluid to circulate. The two cooling interfaces are connected in series to the refrigerant circuit, allowing the second working fluid to flow through the thermal management module via the two cooling interfaces. The first working fluid can be considered as a coolant, and the second working fluid can be considered as a refrigerant. When the first and second working fluids flow simultaneously through the thermal management module, they exchange heat within the module. The heat dissipation module includes two heat dissipation interfaces connected in series to the refrigerant circuit, enabling the second working fluid to exchange heat with the external environment. The refrigerant pump module includes two refrigerant pump interfaces connected in series to the refrigerant circuit. The module is positioned between the thermal management module and the heat dissipation module, and it enhances the flow rate of the second working fluid. During liquid cooling system operation, the refrigerant pump module and heat dissipation module work together to heat or cool the load through heat exchange between the second working fluid in the refrigerant circuit and the first working fluid in the coolant circuit, thus achieving thermal management of the load. The refrigerant pump module is also compatible with a wider range of refrigerants, reflecting the environmental evolution of refrigerants.

[0006] The aforementioned liquid cooling system's thermal management module, heat dissipation module, and refrigerant pump module all feature a modular structure. The internal structure of each module allows for both structural and functional integration, achieving integrated design and facilitating spatial layout. Each module can function as an independent unit, operating independently or connected to the coolant or refrigerant circuit via an interface to perform its function, thereby improving the heat treatment efficiency of the liquid cooling system. Furthermore, the refrigerant pump module offers high efficiency and energy savings, further enhancing the operational efficiency of the liquid cooling system.

[0007] In some possible implementations, the liquid cooling system also includes a compressor connected between the thermal management module and the heat dissipation module. The compressor can cool or heat the second working fluid in the refrigerant circuit. To coordinate with the compressor and enable it to work with the refrigerant pump module and heat exchange module to achieve different operating modes, the liquid cooling system also includes a reversing valve module. The reversing valve module includes a first interface, a second interface, a third interface, and a fourth interface. The first and second interfaces are connected to the refrigerant circuit, and the compressor is connected to the third and fourth interfaces, respectively. The reversing valve module is used to control the flow direction of the second working fluid.

[0008] Possibly, the reversing valve module includes a first bypass valve, one end of which is connected to a first interface and a third interface, and the other end of which is connected to a second interface and a fourth interface. The first bypass valve is equivalent to being connected in parallel across the two ends of the compressor. The first bypass valve and the compressor provide two liquid flow paths between the first interface and the second interface. By regulating and controlling the first bypass valve, the flow direction and path of the second working fluid can be adjusted.

[0009] Furthermore, the reversing valve module also includes a four-way valve. The four-way valve includes a first port, a second port, a third port, a fourth port, and a valve core. The first port is connected to the first interface, the second port to the third interface, the third port to the fourth interface, and the fourth port to the second interface. The four-way valve has a first state and a second state, and the valve core is movably disposed within the four-way valve to control the switching between the first and second states. When the four-way valve is in the first state, the first and second ports are connected, and the third and fourth ports are connected. When the four-way valve is in the second state, the first and fourth ports are connected, and the second and third ports are connected. In specific implementations, the four-way valve can also be implemented through other structures and combinations, as long as the liquid cooling system can switch between different operating modes as needed.

[0010] In one possible implementation, the fluorine pump module includes a fluorine pump connected between two fluorine pump interfaces. The fluorine pump can efficiently drive the second working fluid circulation and heat exchange with the first working fluid, improving heat dissipation efficiency.

[0011] Furthermore, the fluorine pump module may also include a second bypass valve, with its two ends connected to two fluorine pump ports respectively. The second bypass valve is essentially connected in parallel to both ends of the fluorine pump. When the liquid cooling system also includes other modules that drive a second working fluid circulation, the fluorine pump module with the second bypass valve can achieve the bypass function of the fluorine pump.

[0012] In one possible implementation, the thermal management module includes a water pump and a first heat exchanger. The first heat exchanger includes a first pipeline and a second pipeline. The water pump is connected in series with the first pipeline between two liquid-cooled interfaces, and the two ends of the second pipeline are connected to two refrigeration interfaces respectively. When the first working fluid flows through the first pipeline and the second working fluid flows through the second pipeline, the first working fluid can exchange heat with the second working fluid, realizing heat exchange between the coolant circuit and the refrigerant circuit.

[0013] In one possible implementation, the thermal management module also includes a dehumidification module, with its two ends connected to two refrigeration interfaces. The dehumidification module can be considered to be connected in parallel across the first heat exchanger. When the air temperature inside the energy storage device is lower than the dew point temperature, the dehumidification module can condense water vapor in the energy storage device, reducing the humidity of the energy storage device.

[0014] A second throttling valve is provided between the dehumidification module and the refrigeration interface used to connect the refrigerant pump module. The second throttling valve is used to control the flow rate of the second working fluid flowing through the dehumidification module.

[0015] In one possible implementation, the thermal management module also includes an electric heating component, which can be connected in series between the two liquid cooling interfaces to access the coolant circuit. When load heating is required, the electric heating component can directly heat the first working fluid.

[0016] In one possible implementation, a first throttling valve is provided between the first heat exchanger and the refrigeration interface for connecting the refrigerant pump module. The first throttling valve is capable of regulating the flow rate of the second working fluid flowing through the second pipeline.

[0017] In one possible implementation, the heat dissipation module includes a second heat exchanger and a fan. Both ends of the second heat exchanger are connected to heat dissipation interfaces, and the fan is positioned on one side of the second heat exchanger. When the second working fluid inside the second heat exchanger exchanges heat with the ambient air, activating the fan increases the airflow velocity and improves the heat exchange efficiency of the second heat exchanger.

[0018] Secondly, this application provides an energy storage device, including at least one battery module and any of the liquid cooling systems provided in the first aspect. Each battery module has two liquid cooling interfaces connected to its two ends, and the battery module acts as a load. This liquid cooling system can adopt different operating modes according to different ambient temperatures to manage the thermal performance of the battery module, offering advantages such as high integration and energy efficiency.

[0019] Specifically, each battery module includes a battery and a liquid cooling plate. The liquid cooling plate's inlet and outlet are connected to two liquid cooling interfaces, and the liquid cooling plate is in thermal contact with the battery. A coolant circuit can be formed between the thermal management module of the liquid cooling system and the liquid cooling plate. When the first working fluid flows through the liquid cooling plate, it can exchange heat with the battery, thus achieving the purpose of battery thermal management.

[0020] In one possible implementation, if the energy storage device is an electrical cabinet or similar device, then the energy storage device also includes a cabinet, and at least one battery module and a liquid cooling system are housed within the cabinet.

[0021] Thirdly, this application also provides an energy storage system, including the energy storage device as described in the second aspect above. The energy storage system further includes a power generation device and a power conversion device, wherein the power conversion device is connected between the power generation device and the energy storage device, and the power generation device is used to store the generated electrical energy into a battery module in the energy storage device through the power conversion device.

[0022] Fourthly, this application also provides a charging network, which may include a charging pile and the energy storage device provided in the second aspect above. The charging pile is electrically connected to a battery module in the energy storage device, and the battery module is used to supply electrical energy to the charging pile.

[0023] For the technical effects that can be achieved by the second to fourth aspects mentioned above, please refer to the description of the technical effects that can be achieved by the corresponding design scheme in the first aspect mentioned above. This application will not repeat them here. Attached Figure Description

[0024] Figure 1a This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application; Figure 1b This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application; Figure 2a A simplified structural diagram of an energy storage device provided in Embodiment 1 of this application; Figure 2b This is a schematic diagram of the structure of an energy storage device provided in Embodiment 1 of this application; Figure 2c A simplified structural diagram of an energy storage device provided in Embodiment 1 of this application; Figure 3a This is a schematic diagram of the structure of an energy storage device provided in Embodiment 1 of this application; Figure 3b This is a schematic diagram of the structure of an energy storage device provided in Embodiment 1 of this application; Figure 3c This is a schematic diagram of the structure of an energy storage device provided in Embodiment 1 of this application; Figure 4aThis is a schematic diagram of the flow path in one operating mode of an energy storage device, provided in Embodiment 1 of this application. Figure 4b This is a schematic diagram of the flow path of an energy storage device in operation mode two, provided in Embodiment 1 of this application; Figure 5 This is a simplified structural diagram of an energy storage device provided in Embodiment 2 of this application; Figure 6 This is a schematic diagram of the structure of an energy storage device provided in Embodiment 2 of this application; Figure 7a This is a schematic diagram of the flow path in one operating mode of an energy storage device provided in Embodiment 2 of this application; Figure 7b This is a schematic diagram of the flow path of an energy storage device in operation mode 2, as provided in Embodiment 2 of this application; Figure 7c This is a schematic diagram of the flow path for an energy storage device in operation mode three, as provided in Embodiment 2 of this application. Figure 7d This is a schematic diagram of the four-time circulation path of an energy storage device in the second embodiment of this application; Figure 8a This is a schematic diagram of the structure of an energy storage device provided in Embodiment 3 of this application; Figure 8b This is a schematic diagram of the structure of a four-way valve in the first state in an energy storage device according to Embodiment 3 of this application; Figure 8c This is a schematic diagram of the structure of a four-way valve in the second state in an energy storage device according to Embodiment 3 of this application; Figure 9a This is a schematic diagram of the flow path in a single operating mode of an energy storage device, provided in Embodiment 3 of this application. Figure 9b This is a schematic diagram of the flow path of an energy storage device in operation mode two, provided in Embodiment 3 of this application; Figure 9c This is a schematic diagram of the flow path for an energy storage device in three operating modes, as provided in Embodiment 3 of this application. Figure 9d This is a schematic diagram of the four-time circulation path of an energy storage device in the third embodiment of this application; Figure 10a This application provides a schematic diagram of a structure for implementing the four-way valve function in an energy storage device, as shown in Embodiment 3. Figure 10b This application provides a schematic diagram of the working principle of a four-way valve in an energy storage device, as shown in Embodiment 3. Figure 10c This application provides a schematic diagram of the working principle of a four-way valve in an energy storage device, as shown in Embodiment 3. Figure 11a This application provides a schematic diagram of a structure for implementing the four-way valve function in an energy storage device, as shown in Embodiment 3. Figure 11b This application provides a schematic diagram of the working principle of a four-way valve in an energy storage device, as shown in Embodiment 3. Figure 11c This application provides a schematic diagram of the working principle of a four-way valve in an energy storage device, as shown in Embodiment 3. Figure 12a This is a schematic diagram of the structure of an energy storage device provided in Embodiment 4 of this application; Figure 12b This is a schematic diagram of the structure of an energy storage device provided in Embodiment 4 of this application; Figure 13 This is a schematic diagram of the structure of an energy storage cabinet provided in an embodiment of this application; Figure 14 A structural block diagram of an energy storage system provided in an embodiment of this application; Figure 15 This is a structural block diagram of a charging network provided in an embodiment of this application. Detailed Implementation

[0025] Battery thermal management in energy storage systems is crucial for ensuring the safety and stability of energy storage batteries. Traditional air cooling methods are insufficient to meet the requirements of energy storage efficiency and equipment space. With technological advancements, liquid cooling circulation heat dissipation has been applied to battery thermal management in energy storage systems. However, current liquid cooling systems suffer from low integration and insufficient thermal management efficiency.

[0026] Based on this, embodiments of this application provide a liquid cooling system, an energy storage device, an energy storage system, and a charging network that can be applied to battery thermal management in energy storage devices. Liquid cooling efficiency is improved by adding a fluorine pump module. The liquid cooling system, through its modular structural design, allows each module to function as an independent functional unit, which facilitates structural integration and space design, thereby improving the system's thermal management efficiency.

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0028] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0029] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0030] This application provides an energy storage device. Figure 1a A simplified architecture of an energy storage device is shown. The device includes a battery module 200 and a liquid cooling system 100 for liquid cooling the battery module 200. The battery module 200 can be considered as the entire load for thermal management within the liquid cooling system 100. The battery module 200 includes a battery 210 and a liquid cooling plate 220 in thermal contact with the battery 210. Specifically, the energy storage device includes a coolant circuit H1 and a refrigerant circuit H2. A first working fluid circulates in the coolant circuit H1. The liquid cooling plate 220 of the battery module 200 is connected to the coolant circuit H1, and the coolant circuit H1 circulates the first working fluid into the liquid cooling plate 220. The first working fluid can exchange heat with the battery module 200 through the liquid cooling plate 220, thereby managing the thermal performance of the battery 210. A second working fluid circulates in the refrigerant circuit H2, and this second working fluid can exchange heat with the external environment. The first working fluid in the coolant circuit H1 exchanges heat with the second working fluid in the refrigerant circuit H2, thereby achieving thermal management of the battery 210. Here, the liquid cooling plate 220 can also be replaced by other types of heat exchangers such as a submerged heat exchanger. When the liquid cooling plate 220 is a submerged heat exchanger, the battery 210 and the liquid cooling plate 220 can be integrated, that is, the battery 210 can be immersed in the first working fluid within the liquid cooling plate 220.

[0031] It should be understood that Figure 1a The flow directions of the first working fluid in the coolant circuit H1 and the second working fluid in the refrigerant circuit H2 are only examples. The first working fluid can be considered as coolant, and the second working fluid can be considered as refrigerant.

[0032] The battery module 200 can be provided as one or more. That is, the energy storage device provided in this application embodiment can perform thermal management for one battery module 200 or multiple battery modules 200. When the number of battery modules 200 is two, three or more, the liquid cooling plates 220 of multiple battery modules 200 can be connected in parallel to the coolant circuit H1 of the liquid cooling system 100. Figure 1b This illustrates a scenario where the liquid cooling system 100 simultaneously manages the thermal performance of two battery modules 200.

[0033] based on Figure 1a and Figure 1b The basic architecture of the energy storage device shown is illustrated. The liquid cooling system 100 in the energy storage device provided in this application embodiment may have multiple implementation methods, which will be exemplarily described below through specific embodiments.

[0034] Example 1

[0035] like Figure 2a As shown in the embodiment of this application, an energy storage device is provided, taking the thermal management of a battery module 200 by a liquid cooling system 100 as an example. The energy storage device includes a coolant circuit H1 and a refrigerant circuit H2. The structure and principle of the coolant circuit H1 and the refrigerant circuit H2 are as follows: Figure 1a and Figure 1b As shown. The liquid cooling system 100 includes a thermal management module 10 and a heat dissipation module 20. The thermal management module 10 includes two liquid cooling interfaces 101 and two cooling interfaces 102. The two liquid cooling interfaces 101 are connected in series to a coolant circuit H1, and a first working fluid in the coolant circuit H1 can flow through the thermal management module 10 between the two liquid cooling interfaces 101. The two cooling interfaces 102 are connected in series to a refrigerant circuit H2, and a second working fluid in the refrigerant circuit H2 can flow through the thermal management module 10 between the two cooling interfaces 102. The thermal management module 10 is used to exchange heat between the coolant circuit H1 and the refrigerant circuit H2, that is, the first working fluid and the second working fluid can exchange heat when flowing through the thermal management module 10. The heat dissipation module 20 includes two heat dissipation interfaces 201, which are connected in series to the refrigerant circuit H2, and a second working fluid in the refrigerant circuit H2 can flow through the heat dissipation module 20 between the two heat dissipation interfaces 201. The heat dissipation module 20 is used to exchange heat between the refrigerant circuit H2 and the environment, that is, the second working fluid can exchange heat in the external environment while the heat dissipation module 20 is in the external environment.

[0036] Specifically, such as Figure 2bAs shown, the thermal management module 10 includes a water pump 12 and a first heat exchanger 11. The first heat exchanger 11 includes a first pipe 111 and a second pipe 112. The water pump 12 and the first pipe 111 are connected in series between two liquid-cooled interfaces 101, meaning that the water pump 12 and the first pipe 111 can be connected to the coolant circuit H1 through the two liquid-cooled interfaces 101. The first working fluid in the coolant circuit H1 can flow through the first pipe 111 and the water pump 12. The two ends of the second pipe 112 are respectively connected to two refrigeration interfaces 102, meaning that the second pipe 112 can be connected to the refrigerant circuit H2 through the two refrigeration interfaces 102. The second working fluid in the refrigerant circuit H2 can flow through the second pipe 112. When the first working fluid flows through the first pipe 111 and the second working fluid flows through the second pipe 112, the first working fluid can exchange heat with the second working fluid, realizing heat exchange between the coolant circuit H1 and the refrigerant circuit H2. Here, the first heat exchanger 11 achieves liquid-liquid heat exchange through its structure.

[0037] The heat dissipation module 20 includes a second heat exchanger 21 and a fan 22. The two ends of the second heat exchanger 21 are connected to two heat dissipation ports 201, meaning the second heat exchanger 21 can be connected to the refrigerant circuit H2 through the two heat dissipation ports 201. The second working fluid in the refrigerant circuit H2 can flow through the second heat exchanger 21. The fan 22 is located on the outside of the second heat exchanger 21, specifically on the side of the heat dissipation module 20 facing the external space. When the second working fluid in the second heat exchanger 21 exchanges heat with the ambient air, activating the fan 22 increases the airflow velocity and improves the heat exchange efficiency of the second heat exchanger 21. Here, the second heat exchanger 21 achieves gas-liquid heat exchange through its structure. It should be understood that the specific form of the second heat exchanger 21 can be one of the following structures, such as a heater, cooler, condenser, or evaporator, depending on the specific application scenario. For example, when the function of the second heat exchanger 21 is to transfer heat from the refrigerant circuit H2 to the external environment, the second heat exchanger 21 can specifically be a condenser.

[0038] exist Figure 2a Based on the energy storage device shown, such as Figure 2c As shown, the liquid cooling system 100 includes a thermal management module 10, a heat dissipation module 20, and a refrigerant pump module 30. The refrigerant pump module 30 includes two refrigerant pump interfaces 301, which are connected in series to the refrigerant circuit H2. The refrigerant pump module 30 is connected between the thermal management module 10 and the heat dissipation module 20. Under certain operating conditions, the refrigerant pump module 30 can provide circulation power for the second working fluid in the refrigerant circuit H2. Figure 2c In the energy storage device shown, the flow direction of the first working fluid in the coolant circuit H1 and the flow direction of the second working fluid in the refrigerant circuit H2 are not illustrated.

[0039] Combination Figure 2cThe energy storage device shown features a modular structure for its thermal management module 10, heat dissipation module 20, and refrigerant pump module 30. In practical implementation, the structures within each module can be integrated into a single physical shell. This modular integration allows for both structural and functional integration, achieving integrated design and facilitating efficient spatial arrangement when matched with other structures. Each module can function as an independent unit, operating independently or connected to either the coolant circuit H1 or the refrigerant circuit H2 via an interface. For the entire energy storage device, the liquid cooling system 100 can be implemented with a modular architecture. Appropriate modules can be selected and combined according to different usage scenarios and requirements to improve the thermal efficiency of the liquid cooling system 100. Furthermore, the refrigerant pump module 30 offers high energy efficiency under certain operating conditions, further enhancing the operational efficiency of the liquid cooling system 100.

[0040] based on Figure 2c The energy storage device structure shown is as follows: Figure 3a As shown, the refrigerant pump module 30 includes a refrigerant pump 31, which is connected between two refrigerant pump interfaces 301. The refrigerant pump 31 drives a second working fluid to circulate in the refrigerant circuit H2. The flow direction of the second working fluid in the refrigerant circuit H2 is not limited. The refrigerant pump 31 has the advantages of energy saving and high efficiency, effectively driving the second working fluid circulation and heat exchange with the first working fluid, improving the efficiency of heat dissipation for the battery 210. The refrigerant pump 31 has excellent corrosion resistance and high temperature resistance, can adapt to a wider variety of refrigerants, and is compatible with the environmental evolution of refrigerants.

[0041] In some embodiments, such as Figure 3b As shown, the fluorine pump module 30 includes a fluorine pump 31 and a second bypass valve 32, which are connected in parallel between two fluorine pump ports 301. Between the two fluorine pump ports 301 of the fluorine pump module 30, the fluorine pump 31 and the second bypass valve 32 each provide a liquid channel. Under different operating conditions, the second bypass valve 32 can be opened or closed as needed to change the flow path of the second working fluid. Specifically, when the second bypass valve 32 is closed, the second working fluid can only flow between the two fluorine pump ports 301 through the fluorine pump 31, which increases the flow rate of the second working fluid. When the second bypass valve 32 is open, the fluorine pump 31 can be closed, and the second working fluid can circulate through the second bypass valve 32. When the liquid cooling system 100 also includes other modules that drive the circulation of the second working fluid, the fluorine pump module 30 with the second bypass valve 32 can realize the bypass function of the fluorine pump 31. The second bypass valve 32 can be a solenoid valve, check valve, ball valve, or other valves with shut-off function.

[0042] Figure 3cA variation of a liquid cooling system 100 for an energy storage device is shown. The thermal management module 10 further includes an electric heating component 14, which specifically includes a heating resistor. When energized, the heating resistor heats a first working fluid in the coolant circuit H1. Exemplarily, the electric heating component 14 is connected between the first heat exchanger 11 and one of the liquid cooling interfaces 101, which is located away from the water pump 12. When the ambient temperature is low and heating of the battery 210 is required, the electric heating component 14 can be activated to heat the first working fluid. The heat from the first working fluid is transferred to the battery 210 through the liquid cooling plate 220, thus heating the battery 210. Of course, the electric heating component 14 can also be located anywhere in the coolant circuit H1. When the electric heating component 14 is located on the side of the liquid inlet of the liquid cooling plate 220, the heating efficiency of the electric heating component 14 for the battery 210 is higher.

[0043] based on Figures 3a to 3c The energy storage device architecture shown is based on Figure 3c Taking the structure shown as an example, the operating mode of the liquid cooling system 100 can be referred to... Figure 4a and Figure 4b An example is provided.

[0044] Operating mode 1: such as Figure 4a As shown, when the ambient temperature is moderate but heat dissipation of the battery 210 is required, the liquid cooling system 100 can manage the heat of the battery 210 through the fluorine pump 31 in the fluorine pump module 30 in conjunction with the heat dissipation module 20. Specifically, the water pump 12 is turned on, the electric heating component 14 is turned off, and the first working fluid in the coolant circuit H1 circulates under the drive of the water pump 12. The first working fluid carries away the heat of the battery 210 through the liquid cooling plate 220, causing the temperature of the first working fluid to rise. The second bypass valve 32 is closed, and the second working fluid in the refrigerant circuit H2 circulates under the drive of the fluorine pump 31. The second working fluid exchanges heat with the outside through the second heat exchanger 21 and the fan 22. In the first heat exchanger 11, the first working fluid in the first pipeline 111 and the second working fluid in the second pipeline 112 exchange heat, reducing the temperature of the first working fluid. The second working fluid carries away the heat from the first working fluid. The first working fluid, with its temperature decreasing, continues to circulate through the coolant circuit H1 and dissipates heat to the battery 210 through the liquid cooling plate 220. The second working fluid, with its temperature increasing, continues to circulate through the refrigerant circuit H2 and transfers heat to the external environment through the second heat exchanger 21 and the fan 22, thereby achieving heat dissipation for the battery 210. The flow direction of the first working fluid in the first pipe 111 of the coolant circuit H1 is opposite to the flow direction of the second working fluid in the second pipe 112 of the refrigerant circuit H2. In this operating mode, the liquid cooling system 100, through the cooperation of the fluorine pump module 30 and the heat dissipation module 20, can achieve natural air cooling of the energy storage device, which is energy-saving and efficient. In this operating mode, the structure of the second bypass valve 32 in the fluorine pump module 30 can be omitted.

[0045] Operating mode two: such as Figure 4b As shown, when the ambient temperature is low and heating of the battery 210 is required, the second working fluid circulation in the refrigerant circuit H2 terminates. The water pump 12 and the electric heating assembly 14 are activated. The first working fluid in the coolant circuit H1 circulates under the drive of the water pump 12, and the electric heating assembly 14 heats the first working fluid in the coolant circuit H1. The increased temperature of the first working fluid then heats the battery 210 through the liquid cooling plate 220, ensuring that the battery 210 remains at a suitable operating temperature. In this operating mode, the refrigerant circuit H2 is closed, and the battery 210 is heated in a low-temperature environment by the electric heating assembly 14, which is simple and efficient.

[0046] Example 2

[0047] like Figure 5 As shown, in the energy storage device provided in the embodiments of this application, and... Figure 2c Compared to the illustrated architecture, the liquid cooling system 100 further includes a compressor 40 connected between the thermal management module 10 and the heat dissipation module 20. Exemplarily, the compressor 40 is connected between one end of the thermal management module 10 and the heat dissipation module 20, and the refrigerant pump module 30 is connected between the other end of the thermal management module 10 and the heat dissipation module 20. The compressor 40 can cool the second working fluid in the refrigerant circuit H2 to lower its temperature. Alternatively, the compressor 40 can heat the second working fluid in the refrigerant circuit H2 to raise its temperature. The thermal management module 10 also includes a first throttle valve 13 connected between the second pipe 112 of the first heat exchanger 11 and the refrigeration interface 102 for connecting the refrigerant pump module 30. The first throttle valve 13 can regulate the flow rate of the second working fluid through the second pipe 112. The liquid cooling system 100 also includes a reversing valve module 50. The reversing valve module 50 includes a first interface 501, a second interface 502, a third interface 503, and a fourth interface 504. The first interface 501 and the second interface 502 are connected to the refrigerant circuit H2. The compressor 40 is connected between the third interface 503 and the fourth interface 504. The reversing valve module 50 controls the flow direction of the second working fluid within the refrigerant circuit H2. The compressor 40 can cool the second working fluid in the refrigerant circuit H2 to lower its temperature. Alternatively, the compressor 40 can heat the second working fluid in the refrigerant circuit H2 to raise its temperature. The reversing valve module 50 is configured to control the flow direction and path of the second working fluid between the compressor 40 and the refrigerant circuit H2, enabling the compressor 40 to perform different functions in different application scenarios.

[0048] Figure 6 A schematic diagram of the specific structure of the energy storage device is shown, and... Figure 3c compared to, Figure 6The energy storage device shown includes a compressor 40 and a reversing valve module 50. The reversing valve module 50 includes a first bypass valve 51, one end of which is connected to a first interface 501 and a third interface 503, and the other end is connected to a second interface 502 and a fourth interface 504. The first bypass valve 51 and the compressor 40 provide two liquid flow paths between the first interface 501 and the second interface 502. The second working fluid in the refrigerant circuit H2 can flow through the first bypass valve 51 via the first interface 501 and the second interface 502. By regulating the first bypass valve 51, the flow direction and path of the second working fluid are adjusted in conjunction with the compressor 40. Here, the first bypass valve 51 is equivalent to being connected in parallel across the two ends of the compressor 40. The first bypass valve 51 can be a solenoid valve, a check valve, a ball valve, or any other valve with a shut-off function.

[0049] based on Figure 6 The operating mode of the liquid cooling system 100 in the energy storage device shown can be referred to Figures 7a to 7d An example is provided.

[0050] Operating mode 1: such as Figure 7a As shown, when the ambient temperature is moderate but heat dissipation of the battery 210 is required, the liquid cooling system 100 can manage the heat of the battery 210 through the fluorine pump 31 in the fluorine pump module 30 in conjunction with the heat dissipation module 20. Specifically, the water pump 12 is turned on, the electric heating component 14 is turned off, and the first working fluid in the coolant circuit H1 circulates under the drive of the water pump 12. The first working fluid carries away the heat of the battery 210 through the liquid cooling plate 220, causing the temperature of the first working fluid to rise. The first throttle valve 13 is turned on, the second bypass valve 32 is turned off, the first bypass valve 51 is turned on, the compressor 40 is turned off, and the second working fluid in the refrigerant circuit H2 circulates under the drive of the fluorine pump 31. The second working fluid exchanges heat with the outside through the second heat exchanger 21 and the fan 22. In the first heat exchanger 11, the first working fluid in the first pipeline 111 and the second working fluid in the second pipeline 112 exchange heat, reducing the temperature of the first working fluid. The second working fluid carries away the heat from the first working fluid. The first working fluid, with its temperature decreasing, continues to circulate through the coolant circuit H1 and dissipates heat to the battery 210 through the liquid cooling plate 220. The second working fluid, with its temperature increasing, continues to circulate through the refrigerant circuit H2 and transfers heat to the external environment through the second heat exchanger 21 and the fan 22, thereby achieving heat dissipation for the battery 210. The flow direction of the first working fluid in the first pipe 111 of the coolant circuit H1 is opposite to the flow direction of the second working fluid in the second pipe 112 of the refrigerant circuit H2. In this operating mode, the liquid cooling system 100, through the cooperation of the reversing valve module 50, the refrigerant pump module 30, and the heat dissipation module 20, can achieve natural air cooling of the energy storage device, which is energy-saving and efficient.

[0051] Operating mode two: such as Figure 7bAs shown, when the ambient temperature is low and heating of the battery 210 is required, the first throttle valve 13 is closed, terminating the circulation of the second working fluid in the refrigerant circuit H2. The water pump 12 and the electric heating assembly 14 are activated. The first working fluid in the coolant circuit H1 circulates under the drive of the water pump 12, and the electric heating assembly 14 heats the first working fluid in the coolant circuit H1. The increased temperature of the first working fluid then heats the battery 210 through the liquid cooling plate 220, ensuring that the battery 210 remains at a suitable operating temperature. In this operating mode, the refrigerant circuit H2 is closed, and the battery 210 is heated in a low-temperature environment by the electric heating assembly 14, which is simple and efficient.

[0052] Operating mode three: such as Figure 7c As shown, when the ambient temperature is low and heating of the battery 210 is required, the liquid cooling system 100 can achieve a heat pump function through the reversing valve module 50 and the compressor 40 to manage the heat of the battery 210. Specifically, the first throttle valve 13 is open, the second bypass valve 32 is open, and the compressor 40 is turned on. The second working fluid in the refrigerant circuit H2 circulates under the drive of the refrigerant pump 31. The flow direction of the first working fluid in the coolant circuit H1 in the first pipe 111 is the same as the flow direction of the second working fluid in the refrigerant circuit H2 in the second pipe 112. The second working fluid flows through the second bypass valve 32 and the compressor 40. The compressor 40 starts to heat the second working fluid and raise its temperature. The second working fluid flows directly to the thermal management module 10 to heat the first working fluid and raise its temperature. The first working fluid with the increased temperature continues to circulate through the coolant circuit H1 and heats the battery 210 through the liquid cooling plate 220. The second working fluid with the decreased temperature continues to circulate through the refrigerant circuit H2. In this operating mode, the electric heating component 14 is turned off, and the battery 210 is heated in a low-temperature environment by the compressor 40, which is more efficient.

[0053] Operating Mode 4: (e.g.) Figure 7dAs shown, when the ambient temperature is high and heat dissipation of the battery 210 is required, the liquid cooling system 100 can achieve a cooling function through the cooperation of the reversing valve module 50 and the compressor 40, thereby managing the heat of the battery 210. Specifically, the first throttle valve 13 is open, the second bypass valve 32 is open, and the compressor 40 is turned on. The second working fluid in the refrigerant circuit H2 circulates under the drive of the refrigerant pump 31. The flow direction of the first working fluid in the coolant circuit H1 in the first pipe 111 is opposite to the flow direction of the second working fluid in the refrigerant circuit H2 in the second pipe 112. The second working fluid flows through the second bypass valve 32 and the compressor 40, and the compressor 40 starts to cool the second working fluid and lower its temperature. The second working fluid absorbs heat from the ambient environment through the second heat exchanger 21 and the fan 22. In the first heat exchanger 11, the first working fluid in the first pipe 111 and the second working fluid in the second pipe 112 exchange heat, lowering the temperature of the first working fluid. The first working fluid in the coolant circuit H1 and the second working fluid in the refrigerant circuit H2 exchange heat within the first heat exchanger 11 through the first pipe 111 and the second pipe 112. This allows the second working fluid to carry away the heat from the first working fluid. The cooled first working fluid continues to circulate through the coolant circuit H1 and dissipates heat to the battery 210 through the liquid cooling plate 220. The heated second working fluid continues to circulate through the refrigerant circuit H2. In this operating mode, the compressor 40 provides cooling to the battery 210 in high-temperature environments, resulting in higher efficiency.

[0054] It should be noted that when the compressor 40 is used for heating, the first bypass valve 51 can be opened to reduce the pressure of the compressor 40 and prevent the compressor 40 from malfunctioning. When the compressor 40 is used for cooling, the first bypass valve 51 can be closed.

[0055] Example 3

[0056] based on Figure 5 The energy storage device structure shown is as follows: Figure 8a As shown, another energy storage device provided in this application embodiment is similar to... Figure 6The architecture shown is a modification of the reversing valve module 50, which includes a four-way valve 52 and a first bypass valve 51. The two ends of the first bypass valve 51 are connected to the third interface 503 and the fourth interface 504, respectively, allowing the first bypass valve 51 to be connected in parallel with the compressor 40. The four-way valve 52 includes a first port a1, a second port a2, a third port a3, a fourth port a4, and a valve core (not shown here). The first port a1 is connected to the first interface 501, the second port a2 is connected to the third interface 503, the third port a3 is connected to the fourth interface 504, and the fourth port a4 is connected to the third interface 503. The four-way valve 52 has a first state and a second state, corresponding to different conduction states. The valve core is movably disposed within the four-way valve 52 to control the switching of the four-way valve 52 between the first and second states. Through the adjustment and control of the first bypass valve 51 and the four-way valve 52, the flow direction and path of the second working fluid are adjusted in conjunction with the compressor 40.

[0057] When the four-way valve 52 is in the first state, such as Figure 8b As shown, the first port a1 and the second port a2 are connected, and the third port a3 and the fourth port a4 are connected, so that the second working fluid flow path in the refrigerant circuit H2 includes: first interface 501 - first port a1 - second port a2 - first bypass valve 51 or compressor 40 - fourth port a4 - third port a3 - second interface 502.

[0058] When the four-way valve 52 is in the second state, such as Figure 8c As shown, the first port a1 and the fourth port a4 are connected, and the second port a2 and the third port a3 are connected, so that the second working fluid flow path in the refrigerant circuit H2 includes: second interface 502 - third port a3 - second port a2 - first bypass valve 51 or compressor 40 - fourth port a4 - first port a1 - first interface 501.

[0059] based on Figures 8a to 8c The energy storage device architecture shown, and the operating mode of the liquid cooling system 100 can be combined with... Figures 9a to 9d Please provide an explanation.

[0060] Operating mode 1: such as Figure 9aAs shown, when the ambient temperature is neither too high nor too low and heat dissipation of the battery 210 is required, the liquid cooling system 100 can manage the heat of the battery 210 through the fluorine pump 31 in the fluorine pump module 30 in conjunction with the heat dissipation module 20. Specifically, the water pump 12 is turned on, the electric heating component 14 is turned off, and the first working fluid in the coolant circuit H1 circulates under the drive of the water pump 12. The first working fluid carries away the heat of the battery 210 through the liquid cooling plate 220, causing the temperature of the first working fluid to rise. The first throttle valve 13 is turned on, the second bypass valve 32 is turned off, the first bypass valve 51 is turned on, the compressor 40 is turned off, and the second working fluid in the refrigerant circuit H2 circulates under the drive of the fluorine pump 31. The four-way valve 52 is in the first state, and the second working fluid enters the reversing valve module 50 from the first interface 501, passes through the first port a1, the second port a2, the first bypass valve 51, the fourth port a4, and the third port a3 of the four-way valve 52 in sequence, and then flows out through the second interface 502. The second working fluid exchanges heat with the outside environment through the second heat exchanger 21 and fan 22. Within the first heat exchanger 11, the first working fluid in the first pipe 111 and the second working fluid in the second pipe 112 exchange heat, lowering the temperature of the first working fluid. The first working fluid in the coolant circuit H1 and the second working fluid in the refrigerant circuit H2 exchange heat within the first heat exchanger 11 through the first pipe 111 and the second pipe 112, allowing the second working fluid to carry away the heat from the first working fluid. The cooled first working fluid continues to circulate through the coolant circuit H1 and dissipates heat to the battery 210 through the liquid cooling plate 220. The heated second working fluid continues to circulate through the refrigerant circuit H2 and transfers heat to the external environment through the second heat exchanger 21 and fan 22, thereby achieving heat dissipation for the battery 210. The flow direction of the first working fluid in the coolant circuit H1 within the first pipe 111 is opposite to the flow direction of the second working fluid in the refrigerant circuit H2 within the second pipe 112. In this operating mode, the liquid cooling system 100, through the cooperation of the reversing valve module 50, the fluorine pump module 30 and the heat dissipation module 20, can achieve natural air cooling of the energy storage device, which is energy-saving and efficient.

[0061] Operating mode two: such as Figure 9b As shown, when the ambient temperature is low, the liquid cooling system 100 can heat the battery 210 via the electric heating component 14. Specifically, when the first throttle valve 13 is closed, the circulation of the second working fluid in the refrigerant circuit H2 terminates. The water pump 12 and the electric heating component 14 are turned on, and the first working fluid in the coolant circuit H1 circulates under the drive of the water pump 12. The electric heating component 14 heats the first working fluid in the coolant circuit H1, and the increased temperature of the first working fluid heats the battery 210 via the liquid cooling plate 220, ensuring that the temperature of the battery 210 is at a suitable operating temperature. In this operating mode, the refrigerant circuit H2 is closed, and the battery 210 is heated in a low-temperature environment by the electric heating component 14, which is simple and efficient.

[0062] Operating mode three: such as Figure 9c As shown, when the ambient temperature is low and heating of the battery 210 is required, the liquid cooling system 100 can achieve a heat pump function through the cooperation of the reversing valve module 50 and the compressor 40 to manage the heat of the battery 210. Specifically, the first throttle valve 13 is open, and the second bypass valve 32 is open. The four-way valve 52 is in the second state, and the second working fluid enters the reversing valve module 50 from the second interface 502, passes through the third port a3, the second port a2, the compressor 40, the fourth port a4, and the first port a1 of the four-way valve 52 in sequence, and then flows out through the first interface 501. The compressor 40 is turned on to heat the second working fluid in the refrigerant circuit H2. The flow direction of the first working fluid in the coolant circuit H1 in the first pipe 111 is the same as the flow direction of the second working fluid in the refrigerant circuit H2 in the second pipe 112. The second working fluid flows through the second bypass valve 32 and the compressor 40. The compressor 40 starts to heat the second working fluid, raising its temperature. The second working fluid then flows directly to the thermal management module 10 to exchange heat with the first working fluid, raising its temperature as well. The heated first working fluid continues to circulate through the coolant circuit H1 and heats the battery 210 through the liquid cooling plate 220. The cooled second working fluid continues to circulate through the refrigerant circuit H2. In this operating mode, the electric heating component 14 is turned off, and the compressor 40 heats the battery 210 in a low-temperature environment, resulting in higher efficiency.

[0063] Operating Mode 4: (e.g.) Figure 9dAs shown, when the ambient temperature is high and heat dissipation of the battery 210 is required, the liquid cooling system 100 can achieve a cooling function through the cooperation of the reversing valve module 50 and the compressor 40, thereby managing the heat of the battery 210. Specifically, the first throttle valve 13 is open, and the second bypass valve 32 is open. The four-way valve 52 is in the first state, and the second working fluid enters the reversing valve module 50 from the first interface 501, passes through the first port a1, the second port a2, the first bypass valve 51, the fourth port a4, and the third port a3 of the four-way valve 52 in sequence, and then flows out through the second interface 502. The compressor 40 is turned on to cool the second working fluid in the refrigerant circuit H2, and the second working fluid circulates. The flow direction of the first working fluid in the coolant circuit H1 in the first pipe 111 is opposite to the flow direction of the second working fluid in the refrigerant circuit H2 in the second pipe 112. The second working fluid exchanges heat with the outside environment through the second heat exchanger 21 and the fan 22. Within the first heat exchanger 11, the first working fluid in the first pipe 111 and the second working fluid in the second pipe 112 exchange heat, lowering the temperature of the first working fluid. The first working fluid in the coolant circuit H1 and the second working fluid in the refrigerant circuit H2 exchange heat within the first heat exchanger 11 via the first pipe 111 and the second pipe 112, allowing the second working fluid to carry away heat from the first working fluid. The cooled first working fluid continues to circulate through the coolant circuit H1 and dissipates heat to the battery 210 through the liquid cooling plate 220, while the heated second working fluid continues to circulate through the refrigerant circuit H2. In this operating mode, the compressor 40 provides cooling to the battery 210 in a high-temperature environment, resulting in higher efficiency.

[0064] The function of the four-way valve 52 can also be achieved by combining four two-way valves or three three-way valves.

[0065] For example, Figure 10a The example shows four two-way valves, namely two-way valve 53a, two-way valve 53b, two-way valve 53c, and two-way valve 53d. Figure 10b As shown, when two-way valves 53a and 53c are closed, and two-way valves 53b and 53d are open, the first port 501 is connected to one side of the compressor 40, and the second port 502 is connected to the other side of the compressor 40. The second working fluid flow path in the refrigerant circuit H2 includes: first port 501 - two-way valve 53b - compressor 40 or first bypass valve 51 - two-way valve 53d - second port 502. Figure 10c As shown, when two-way valves 53a and 53c are open, and two-way valves 53b and 53d are closed, the first port 501 is connected to one side of the compressor 40, and the second port 502 is connected to the other side of the compressor 40. The second working fluid flow path in the refrigerant circuit H2 includes: second port 502 - two-way valve 53c - compressor 40 or first bypass valve 51 - two-way valve 53a - first port 501.

[0066] For example, Figure 11a The example uses three three-way valves, namely three-way valve 54a, three-way valve 54b, and three-way valve 54c. Figure 11b As shown, three-way valve 54a connects to one side of the first port 501 and compressor 40, three-way valve 54b connects to the other side of compressor 40 and three-way valve 54c, and three-way valve 54c then connects to the second port 502, so that the second working fluid flow path in refrigerant circuit H2 includes: first port 501 - two-way valve 53b - compressor 40 or first bypass valve 51 - two-way valve 53d - second port 502. Figure 11c As shown, three-way valve 54c connects to the second port 502 and one side of compressor 40, three-way valve 54b connects to the other side of compressor 40 and three-way valve 54a, and three-way valve 54c then connects to the first port 501, so that the second working fluid flow path in refrigerant circuit H2 includes: second port 502-two-way valve 53c-compressor 40 or first bypass valve 51-two-way valve 53a-first port 501.

[0067] Of course, the function of the four-way valve 52 can also be achieved through other structural replacements, which will not be illustrated here.

[0068] Example 4

[0069] based on Figure 5 The energy storage device structure shown is as follows: Figure 12a and Figure 12b As shown in the embodiment of this application, in another energy storage device, the thermal management module 10 further includes a dehumidification module 15. The two ends of the dehumidification module 15 are respectively connected to the two refrigeration interfaces 102 of the thermal management module 10, and can be considered as the dehumidification module 15 being connected in parallel to the two ends of the first heat exchanger 11. Exemplarily, a second throttle valve 16 can be provided between the dehumidification module 15 and one of the refrigeration interfaces 102 used to connect the refrigerant pump module 30. The second throttle valve 16 is used to control the flow rate of the second working fluid flowing through the dehumidification module 15. When the air temperature inside the energy storage device is lower than the dew point temperature, the dehumidification module 15 can operate to condense water vapor in the energy storage device into water, reducing the humidity of the energy storage device.

[0070] It should be understood that, apart from the dehumidification module 15 and the second throttle valve 16, Figure 12a Other structures in Figure 6 The energy storage devices shown have similar structures. Figure 12b Other structures and Figure 8a The energy storage devices shown have similar structures, so they will not be described in detail here. In specific operating modes, starting the compressor 40 will also activate the dehumidification module 15.

[0071] In summary, the liquid cooling system 100 in the energy storage device provided in this application embodiment has a modular structure, realizing integrated design and facilitating the structural layout of the energy storage device. Each module can function as an independent functional unit, capable of operating independently or combined with the coolant circuit H1 or refrigerant circuit H2 via an interface. Different modules can be selected to achieve different operating modes for different environments, thereby improving the heat treatment efficiency and energy saving of the liquid cooling system 100, and ultimately enhancing the operating efficiency of the energy storage device.

[0072] The energy storage device provided in this application embodiment can be an energy storage cabinet. For example... Figure 13 As shown, the energy storage cabinet includes a cabinet 300 and a liquid cooling system 100 and multiple battery modules 200 housed within the cabinet 300. The liquid cooling system 100 has an outlet pipe 410 and an inlet pipe 420, and the multiple battery modules 200 are connected in parallel between the outlet pipe 410 and the inlet pipe 420. The first working fluid in the coolant circuit H1 can flow into each battery module 200 through the outlet pipe 410 to perform thermal management on the battery 210 in the battery module 200, and the first working fluid after heat exchange with the battery 210 can return to the liquid cooling system 100 through the inlet pipe 420.

[0073] like Figure 14 As shown in the figure, this application embodiment also provides an energy storage system, which may include a power generation device, a power conversion device and the above-mentioned energy storage device. The power conversion device is connected between the power generation device and the energy storage device. The power generation device is used to store the generated electrical energy into the battery 210 of the energy storage device through the power conversion device.

[0074] In addition, the energy storage system may also include a battery management system, which can effectively detect parameters such as temperature, state of charge, and health status of the battery 210, and can also effectively regulate the charging and discharging function of the battery 210, thereby ensuring the normal operation of the energy storage device.

[0075] In practical applications, the power generation equipment can be photovoltaic power generation equipment, wind power generation equipment, etc., and this application does not limit the specific type of power generation equipment. Furthermore, in practical applications, the power generation equipment and the battery can be connected via a distribution cabinet. The distribution cabinet may include DC-AC conversion devices, or it may include devices such as transformers, to facilitate the efficient transfer of electrical energy generated by the power generation equipment to the battery for storage. In specific setups, the number and type of devices in the distribution cabinet can be reasonably configured according to actual needs, and this application does not impose any restrictions on this.

[0076] like Figure 15As shown in the illustration, this application embodiment also provides a charging network, including a charging pile 02 and an energy storage device. The charging pile 02 is electrically connected to the battery module 200 of the energy storage device via a cable, and the battery module 200 can provide its stored electrical energy to the charging pile 02. The charging pile 02 has a connector 021, which can be connected to a powered device (such as a vehicle) to replenish the power of the powered device.

[0077] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A liquid cooling system, characterized in that, The liquid cooling system has a refrigerant circuit for circulating a second working fluid; the liquid cooling system also includes a thermal management module, a heat dissipation module, a refrigerant pump module, a compressor, and a reversing valve module; The thermal management module includes a thermal management housing and a first heat exchanger disposed within the thermal management housing. The thermal management housing is provided with two liquid cooling ports and two refrigeration ports. The first heat exchanger includes a first pipeline and a second pipeline. The first pipeline is connected in series between the two liquid cooling ports and is used to flow a first working fluid. The two liquid cooling ports are used to connect to a load. The second pipeline is connected in series between the two refrigeration ports and is connected in series to the refrigerant circuit. The heat dissipation module includes a heat dissipation housing and a second heat exchanger disposed within the heat dissipation housing. The two ends of the second heat exchanger are respectively connected to two heat dissipation interfaces, and the two heat dissipation interfaces are connected in series to the refrigerant circuit. The refrigerant pump module includes a refrigerant pump housing and a refrigerant pump disposed within the refrigerant pump housing. The refrigerant pump housing has two refrigerant pump ports. The refrigerant pump is connected between the two refrigerant pump ports and connected in series to the refrigerant circuit. The refrigerant pump module is connected between the thermal management module and the heat dissipation module. The compressor is connected between the thermal management module and the heat dissipation module; the reversing valve module includes a first interface, a second interface, a third interface and a fourth interface, the first interface and the second interface are connected to the refrigerant circuit, and the compressor is connected to the third interface and the fourth interface respectively; the reversing valve module is used to control the second working fluid to selectively switch the flow direction to the opposite direction in the refrigerant circuit.

2. The liquid cooling system as described in claim 1, characterized in that, The reversing valve module includes a first bypass valve, which is connected in parallel to both ends of the compressor.

3. The liquid cooling system as described in claim 1, characterized in that, The reversing valve module further includes a four-way valve; the four-way valve includes a first port, a second port, a third port, a fourth port, and a valve core; the first port is connected to the first interface, the second port is connected to the third interface, the third port is connected to the fourth interface, and the fourth port is connected to the second interface; The four-way valve has a first state and a second state; when the four-way valve is in the first state, the first port and the second port are connected, and the third port and the fourth port are connected; when the four-way valve is in the second state, the first port and the fourth port are connected, and the second port and the third port are connected; the valve core is movably disposed in the four-way valve to control the four-way valve to switch between the first state and the second state.

4. The liquid cooling system as described in claim 1, characterized in that, The fluorine pump module also includes a second bypass valve, which is connected in parallel to both ends of the fluorine pump.

5. The liquid cooling system as described in claim 1, characterized in that, The thermal management module includes a water pump; The water pump is connected in series between the two liquid cooling interfaces.

6. The liquid cooling system as described in claim 5, characterized in that, The thermal management module also includes a dehumidification module, with its two ends connected to the two cooling interfaces respectively.

7. The liquid cooling system as described in claim 6, characterized in that, A second throttle valve is provided between the dehumidification module and the refrigeration interface used to connect the fluorine pump module.

8. The liquid cooling system as described in claim 5, characterized in that, The thermal management module also includes an electric heating component, which is connected between the two liquid cooling interfaces and in series with the first heat exchanger.

9. The liquid cooling system as described in claim 5, characterized in that, A first throttling valve is provided between the first heat exchanger and the refrigeration interface for connecting the fluorine pump module.

10. The liquid cooling system as described in any one of claims 1-9, characterized in that, The heat dissipation module includes a fan, which is located on one side of the second heat exchanger.

11. An energy storage device, characterized in that, It includes at least one battery module and a liquid cooling system as described in any one of claims 1-10; each of the battery modules is connected to two liquid cooling interfaces at both ends.

12. The energy storage device as described in claim 11, characterized in that, Each of the battery modules includes a battery and a liquid cooling plate. The liquid cooling plate has an inlet and an outlet connected to two liquid cooling interfaces, and the liquid cooling plate is in thermal contact with the battery.

13. The energy storage device as described in claim 11 or 12, characterized in that, It also includes a cabinet, in which the at least one battery module and the liquid cooling system are housed.

14. An energy storage system, characterized in that, It includes a power generation device, a power conversion device, and an energy storage device as described in any one of claims 11-13, wherein the power conversion device is connected between the power generation device and the energy storage device, and the power generation device is used to store the generated electrical energy into the battery module of the energy storage device through the power conversion device.

15. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in any one of claims 11-13, wherein the charging pile is electrically connected to the energy storage device, and the energy storage device is used to provide electrical energy to the charging pile.

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