Liquid path unit, energy storage device and energy storage system

Abstract

The application provides a liquid path unit, an energy storage device and an energy storage system, and relates to the technical field of energy storage. The liquid path unit has a circulating input port and a circulating output port. The liquid path unit comprises a plurality of heat management components, a first pipeline assembly, a second pipeline assembly, a first switch and a second switch. The heat management components have inlets and outlets. The first pipeline assembly is connected to the circulating input port and the inlets of the heat management components. The second pipeline assembly is connected to the circulating output port and the outlets of the heat management components. The first switch is arranged in the first pipeline assembly and is used for opening or closing the circulating input port. The second switch is arranged in the second pipeline assembly and is used for opening or closing the circulating output port. Therefore, the heat exchange medium can be injected into the liquid path unit before the liquid path unit and the refrigerant unit are assembled, and the injection of the heat exchange medium is facilitated. The first switch and the second switch can form a self-closing system for the liquid path unit, so that the liquid path unit can store and transport the heat exchange medium.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to a liquid circuit unit, an energy storage device, and an energy storage system. Background Technology

[0002] With the vigorous development of electric vehicles powered by batteries, the existing vehicle thermal management systems consist of hundreds or thousands of battery cells. The industry currently mainly uses liquid cooling technology for the thermal management of such a large system, which is difficult to assemble due to the complexity of the system. Summary of the Invention

[0003] This application provides a hydraulic circuit unit, an energy storage device, and an energy storage system to improve the difficulty of assembly caused by the complexity of energy storage systems.

[0004] In a first aspect, embodiments of this application provide a hydraulic system unit having a circulation inlet and a circulation outlet. The hydraulic system unit includes multiple thermal management components, a first pipeline assembly, a second pipeline assembly, a first switch, and a second switch. Each thermal management component has an inlet and an outlet. The first pipeline assembly connects the circulation inlet to the inlet of each thermal management component. The second pipeline assembly connects the circulation outlet to the outlet of each thermal management component. The first switch is disposed on the first pipeline assembly and is used to open or close the circulation inlet. The second switch is disposed on the second pipeline assembly and is used to open or close the circulation outlet.

[0005] In the above technical solution, the liquid handling unit is equipped with a first switch and a second switch. The first switch is located in the first piping assembly and is used to open or close the circulation inlet of the liquid handling unit; the second switch is located in the second piping assembly and is used to open or close the circulation outlet of the liquid handling unit. When the first switch closes the circulation inlet and the second switch closes the circulation outlet, the first and second switches can seal the heat exchange medium within the passage formed by the first piping assembly, the thermal management component, and the second piping assembly. This allows the heat exchange medium to be injected into the liquid handling unit before the assembly of the liquid handling unit and the refrigerant unit, facilitating the injection of the heat exchange medium and thus the assembly of the energy storage device and energy storage system equipped with the liquid handling unit. The first and second switches enable the liquid handling unit to form a self-closing system, thereby realizing the storage and transportation of the heat exchange medium within the liquid handling unit.

[0006] In some embodiments of the first aspect of this application, the first switching element is a quick-connect shut-off valve, and the second switching element is a quick-connect shut-off valve.

[0007] In the above technical solution, the quick-connect shut-off valve can not only open or close the circulation output port and circulation input port, but also facilitate connection with the heat exchanger. In addition, the quick-connect shut-off valve has a high degree of integration, is simple to assemble, and has a cost advantage.

[0008] In some embodiments of the first aspect of this application, the first piping assembly includes a first main pipe and a plurality of first branch pipes, one end of each first branch pipe is connected to the first main pipe, the other end of each first branch pipe is connected to the inlet of at least one of the thermal management components, and the first switch is disposed on the first main pipe.

[0009] In the above technical solution, the first piping assembly includes a first main pipe and multiple first branch pipes. One end of each first branch pipe is connected to the inlet of at least one thermal management component, and the other end of each first branch pipe is connected to the first main pipe. This allows each first piping assembly to manage the heat exchange medium within multiple thermal management components, which helps improve the uniformity of the internal temperature of the liquid circuit unit. A first switching element is disposed on the first main pipe. By opening or closing the first switching element, the channels within the first main pipe can be connected, thereby connecting the circulation inlet and the multiple first branch pipes; or the channels within the first main pipe can be cut off, thereby cutting off the circulation inlet and the multiple first branch pipes, facilitating the installation of the first switching element.

[0010] In some embodiments of the first aspect of this application, the hydraulic system further includes a second main pipe and a third switch, the second main pipe being connected to each of the first branch pipes, the second main pipe having an injection port for injecting heat exchange medium into each of the first branch pipes, and the third switch being disposed on the second main pipe for opening or closing the injection port.

[0011] In the above technical solution, the second main pipe facilitates the injection of heat exchange medium into each first branch, and the third switch can reduce the risk of leakage after the heat exchange medium is injected.

[0012] In some embodiments of the first aspect of this application, the hydraulic system includes a replenishment tank connected to the first main pipe, the replenishment tank being used to replenish heat exchange medium to each of the first branch pipes.

[0013] In the above technical solution, the replenishment tank can replenish the heat exchange medium in a timely manner after the amount of heat exchange medium in the first branch pipe decreases, so as to keep the amount of heat exchange medium in the first pipeline assembly, the thermal management component and the second pipeline assembly constant, so as to keep the liquid circuit unit stable in temperature regulation.

[0014] In some embodiments of the first aspect of this application, at least a portion of the first branch pipe is provided with at least one fourth switch, the fourth switch being used to connect the first main pipe and the thermal management component or to disconnect the first main pipe and the thermal management component.

[0015] In the above technical solution, the setting of the fourth switch facilitates the independent control of the corresponding first branch pipe, thereby facilitating the independent management of each first branch pipe and making the working mode of the liquid circuit assembly more flexible.

[0016] In some embodiments of the first aspect of this application, each of the first branch pipes is provided with two of the fourth switching elements.

[0017] In the above technical solution, each first branch pipe is equipped with two fourth switches, which not only facilitates the independent control of each first branch pipe, but also allows each first branch pipe to be controlled in sections, making it easier to repair and replace the sections where the first branch pipe is faulty, reducing material consumption and lowering costs.

[0018] In some embodiments of the first aspect of this application, at least a portion of the first branch pipe is connected to a second branch pipe, one end of the second branch pipe has a first opening, and the first branch pipe is provided with a fifth switch, the fifth switch being used to connect the first opening and the first branch pipe or to disconnect the first opening and the first branch pipe.

[0019] In the above technical solution, the setting of the second branch pipe facilitates the independent discharge of the heat exchange medium in the first branch pipe without affecting other first branch pipes, thereby facilitating the independent management of the first straight pipe and making the working mode of the liquid circuit assembly more flexible.

[0020] In some embodiments of the first aspect of this application, each of the first branch pipes is connected to a second branch pipe.

[0021] In the above technical solution, each first branch pipe is connected to a second branch pipe, and the heat exchange medium in each first branch pipe is discharged independently without affecting other first branch pipes, thus facilitating the independent management of each first branch pipe and making the working mode of the liquid circuit assembly more flexible.

[0022] In some embodiments of the first aspect of this application, the second piping assembly includes a third main pipe and a plurality of third branch pipes, one end of each third branch pipe being connected to the third main pipe and the other end of each third branch pipe being connected to the outlet of at least one of the thermal management components.

[0023] In the above technical solution, the second pipeline assembly includes a third main pipe and multiple third branch pipes. The other end of each third branch pipe is connected to the outlet of at least one thermal management component. In this way, each second pipeline assembly can manage the heat exchange medium in multiple thermal management components, which is beneficial to improving the uniformity of the internal temperature of the unit with the liquid circuit.

[0024] In some embodiments of the first aspect of this application, the hydraulic system further includes a fourth main pipe and a sixth switch, the fourth main pipe being connected to each of the third branch pipes, the fourth main pipe forming a first exhaust port for venting gas from the second pipeline assembly, and the sixth switch being used to open or close the first exhaust port.

[0025] In the above technical solution, the fourth main pipe facilitates the discharge of gas from each third branch pipe, thereby ensuring that the heat exchange medium can fill the entire first pipeline assembly, second pipeline assembly, and thermal management components, giving the liquid circuit assembly better temperature regulation capabilities. The sixth switch reduces the risk of heat exchange medium leakage.

[0026] In some embodiments of the first aspect of this application, the hydraulic system further includes a fifth main pipe and a seventh switch, at least a portion of the third branch pipe is connected to the fifth main pipe, the fifth main pipe forms a second exhaust port for venting gas from the first piping assembly and the thermal management component, and the seventh switch is used to open or close the second exhaust port.

[0027] In the above technical solution, the fifth main pipe facilitates the discharge of gas into the first piping assembly and the thermal management component, thereby ensuring that the heat exchange medium can fill the entire first piping assembly and the thermal management component, giving the liquid circuit assembly better temperature regulation capabilities. The seventh switch reduces the risk of heat exchange medium leakage.

[0028] In some embodiments of the first aspect of this application, at least a portion of the third branch pipe is provided with at least one eighth switch, the eighth switch being used to connect the third main pipe and the thermal management component or to disconnect the third main pipe and the thermal management component.

[0029] In the above technical solution, the setting of the eighth switch facilitates the independent control of the corresponding third branch pipe, thereby facilitating the independent management of each third branch pipe and making the working mode of the liquid circuit assembly more flexible.

[0030] In some embodiments of the first aspect of this application, each of the third branch pipes is provided with two of the eighth switching elements.

[0031] In the above technical solution, each third branch pipe is equipped with two eighth switches, which not only facilitates the independent control of each third branch pipe, but also allows each third branch pipe to be controlled in sections. This makes it easier to repair and replace sections of the third branch pipe that are faulty, reducing material consumption and lowering costs.

[0032] In some embodiments of the first aspect of this application, at least a portion of the third branch pipe is connected to a fourth branch pipe, one end of the fourth branch pipe has a second opening, and the fourth branch pipe is provided with a ninth switch, which is used to connect the second opening and the third branch pipe or disconnect the second opening and the third branch pipe.

[0033] In the above technical solution, the fourth branch pipe facilitates the independent discharge of the heat exchange medium in the corresponding third branch pipe without affecting other third branch pipes, thereby facilitating the independent management of the third branch pipe and making the operation of the liquid circuit assembly more flexible. The ninth switch reduces the risk of heat exchange medium leakage from the fourth branch pipe when the pipeline is normal.

[0034] In some embodiments of the first aspect of this application, each of the third branch pipes is connected to the fourth branch pipe.

[0035] In the above technical solution, each third branch pipe is connected to a fourth branch pipe, and the heat exchange medium in each third branch pipe is discharged independently without affecting other third branch pipes, thus facilitating the independent management of each third branch pipe and making the operation mode of the liquid circuit assembly more flexible.

[0036] In some embodiments of the first aspect of this application, the hydraulic unit further includes a pumping device for pumping the heat exchange medium in the first piping assembly to the thermal management component.

[0037] In the above technical solution, before the heat exchangers of the liquid circuit unit and the refrigerant unit form a liquid circuit circulation loop, the pumping device enables the heat exchange medium to quickly fill the first piping assembly, each thermal management component, and the second piping assembly, thereby improving the heat exchange medium injection efficiency. After the heat exchangers of the liquid circuit unit and the refrigerant unit form a liquid circuit circulation loop, the pumping device helps to keep the heat exchange medium in a flowing state within the first management component, the thermal management component, and the second piping assembly, thereby improving the temperature regulation capability.

[0038] In some embodiments of the first aspect of this application, the first piping assembly includes a first main pipe and a plurality of first branch pipes, one end of each first branch pipe being connected to the first main pipe and the other end of each first branch pipe being connected to the input end of at least one of the thermal management components; each first branch pipe is provided with the pumping device.

[0039] In the above technical solution, each first branch pipe is equipped with a pumping device. Before the heat exchangers of the liquid circuit unit and the refrigerant unit form a liquid circuit circulation loop, the pumping device enables the heat exchange medium to quickly fill the first pipeline assembly, each thermal management component, and the second pipeline assembly, improving the heat exchange medium injection efficiency and the uniformity of heat exchange medium distribution. After the heat exchangers of the liquid circuit unit and the refrigerant unit form a liquid circuit circulation loop, the pumping device helps to maintain the heat exchange medium in a continuous flow state within the first management component, thermal management component, and second pipeline assembly, improving the temperature regulation capability.

[0040] In some embodiments, the first piping assembly includes a first main pipe and a plurality of first branch pipes, one end of each first branch pipe being connected to the first main pipe and the other end of each first branch pipe being connected to the input end of at least one of the thermal management components; the pumping device is disposed on the first main pipe.

[0041] In the above technical solution, the pumping device is located in the first main pipe, which allows one pumping device to provide power for the circulation of the heat exchange medium in each first branch pipe. This reduces the number of pumping devices in the hydraulic system unit and saves costs. In the embodiment where the hydraulic system unit is located in the energy storage device's housing, fewer pumping devices mean less internal space is occupied in the housing, which is beneficial for improving the energy density of the energy storage device.

[0042] In some embodiments of the first aspect of this application, the hydraulic system further includes a first temperature detection element for detecting the temperature of the heat exchange medium within the first pipeline assembly.

[0043] In the above technical solution, the temperature of the heat exchange medium in the first pipeline assembly is detected by the first temperature detection element, which makes it easy to grasp the temperature of the heat exchange medium in the first pipeline assembly and facilitates more accurate temperature regulation of the battery cells.

[0044] In some embodiments of the first aspect of this application, the hydraulic system further includes a second temperature sensor for detecting the temperature of the heat exchange medium within the second piping assembly.

[0045] In the above technical solution, the temperature of the heat exchange medium in the second pipeline assembly is detected by the second temperature detection element, which makes it easier to grasp the temperature of the heat exchange medium in the second pipeline assembly and facilitates more accurate temperature regulation of the battery cells.

[0046] Secondly, embodiments of this application provide an energy storage device, which includes a housing, a battery cell, and a hydraulic system provided in any of the above embodiments; the battery cell is housed within the housing; the hydraulic system is disposed within the housing, and the thermal management component is used to regulate the temperature of the battery cell.

[0047] In the above technical solutions, the liquid circuit unit in any of the above embodiments is provided with a first switch and a second switch. The first switch is disposed in the first pipeline assembly and is used to open or close the circulation inlet of the liquid circuit unit; the second switch is disposed in the second pipeline assembly and is used to open or close the circulation outlet of the liquid circuit unit. The arrangement of the first and second switches allows the heat exchange medium to be sealed within the passage formed by the first pipeline assembly, the thermal management component, and the second pipeline assembly when the first switch closes the circulation inlet and the second switch closes the circulation outlet. This enables the heat exchange medium to be injected into the liquid circuit unit before the assembly of the liquid circuit unit and the refrigerant unit, facilitating the injection of the heat exchange medium and thus the assembly of the energy storage device.

[0048] Thirdly, this application provides an energy storage system, which includes a refrigerant unit and an energy storage device provided in any of the above embodiments. The refrigerant unit includes a heat exchanger; the circulation output port and the circulation input port are both connected to the heat exchanger.

[0049] In the above technical solution, the refrigerant unit and the energy storage device provided in the above embodiments can be separately installed and then connected into an integral structure, which facilitates the assembly of the energy storage system. Furthermore, the energy storage device in the above embodiments allows the heat exchange medium to be injected into the liquid circuit unit before the liquid circuit unit and the refrigerant unit are assembled, facilitating the injection of the heat exchange medium and thus simplifying the assembly of the energy storage system.

[0050] In some embodiments of the third aspect of this application, the refrigerant unit is disposed outside the housing.

[0051] In the above technical solution, the refrigerant unit is installed outside the energy storage device's casing, which allows more space inside the energy storage device's casing to accommodate individual battery cells, thus improving the energy density of the individual battery cells.

[0052] In some embodiments of the third aspect of this application, the energy storage system includes a plurality of said energy storage devices, wherein the circulation output port and the circulation input port of each said energy storage device are detachably connected to the heat exchanger.

[0053] In the above technical solution, the circulation output port and circulation input port of each of the multiple energy storage devices are detachably connected to the heat exchanger. This allows the refrigerant unit to simultaneously exchange heat with multiple energy storage devices, improving heat exchange efficiency and saving costs. The detachable connection of the circulation output port and circulation input port to the heat exchanger facilitates the assembly or disassembly of the refrigerant unit and energy storage devices, and also facilitates the maintenance and replacement of the energy storage system.

[0054] Fourthly, embodiments of this application also provide a refrigerant system, the refrigerant system including a condenser, a compressor, a heat exchanger, and an energy storage device according to the second aspect, wherein the output end of the compressor is connected to the input end of the condenser; the heat exchanger has a first pair of interfaces and a second pair of interfaces, the first pair of interfaces being used to connect to the input end of the compressor, and the second pair of interfaces being used to connect to the output end of the condenser; both the circulation output port and the circulation input port are connected to the heat exchanger.

[0055] In the above technical solution, the condenser, compressor, heat exchanger, and energy storage device provided in the above embodiments can be separately installed and then connected into an integral structure, which facilitates the assembly of the refrigerant system. Furthermore, the energy storage device in the above embodiments can inject the heat exchange medium into the liquid circuit unit before assembling the liquid circuit unit, heat exchanger, condenser, and compressor, facilitating the injection of the heat exchange medium and thus simplifying the assembly of the refrigerant system. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 Schematic diagram of an energy storage system provided for some embodiments of this application;

[0058] Figure 2 for Figure 1 Schematic diagram of a medium-cooled refrigerant unit;

[0059] Figure 3 for Figure 1 A schematic diagram of the energy storage device in the diagram;

[0060] Figure 4 A schematic diagram of an energy storage device provided for other embodiments of this application.

[0061] Icons: 100 - Energy Storage System; 10 - Refrigerant Unit; 11 - Heat Exchanger; 111 - First Pair of Interfaces; 112 - Second Pair of Interfaces; 113 - Third Pair of Interfaces; 114 - Fourth Pair of Interfaces; 12 - Compressor; 121 - Compressor Input; 122 - Compressor Output; 13 - Condenser; 131 - Condenser Input; 132 - Condenser Output; 14 - First Connecting Pipe; 15 - Second Connecting Pipe; 16 - Third Connecting Pipe; 20 - Energy Storage Device; 21 - Hydraulic System Unit; 21a - Circulation Inlet; 21b - Circulation Outlet; 22 - Housing; 23 - Battery Cell; 24 - Thermal Management Components; 241 - Inlet; 242 - Outlet; 25 - First Piping Assembly; 251 - First Main Pipe; 2511 - First Switching Valve; 252 - First Branch Pipe; 25 3-Fourth switch; 254-Second branch pipe; 2541-First opening; 255-Fifth switch; 26-Second pipeline assembly; 261-Third main pipe; 2611-Second switch valve; 262-Third branch pipe; 263-Eighth switch; 264-Fourth branch pipe; 2641-Second opening; 265-Ninth switch; 27-First switch; 28-Second switch; 29-Second main pipe; 291-Injection port; 210-Third switch; 220-Fourth main pipe; 2201-First exhaust port; 230-Sixth switch; 240-Fifth main pipe; 2401-Second exhaust port; 250-Seventh switch; 260-Pumping device; 270-First temperature sensor; 280-Second temperature sensor; 290-Third temperature sensor; Q-Replenishment box. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0063] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0064] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0065] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0066] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0067] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0068] Power batteries are typically formed by connecting multiple individual cells in series, parallel, or a combination of both. With the rapid development of power batteries in the automotive industry, the energy storage requirements for them are increasing, necessitating the use of more individual cells. The more individual cells there are, the more difficult the thermal management becomes.

[0069] Therefore, an energy storage system has emerged, comprising at least one energy storage device and a refrigerant unit. The energy storage device includes a liquid handling unit and individual battery cells. The liquid handling unit regulates the temperature of the battery cells, while the refrigerant unit exchanges heat with the liquid handling unit to remove the heat from the battery cells, thereby reducing the temperature of the battery cells and achieving temperature management. However, in related technologies, the refrigerant unit and liquid handling unit are integrated, making the energy storage system complex and inconvenient to transport and assemble.

[0070] Based on the above considerations, in order to improve the problem of difficult assembly caused by the complexity of energy storage systems, this application provides a liquid circuit unit. The liquid circuit unit has a circulation inlet and a circulation outlet. The liquid circuit unit includes multiple thermal management components, a first pipeline assembly, a second pipeline assembly, a first switch and a second switch. The thermal management components have inlets and outlets. The first pipeline assembly connects the circulation inlet and the inlet of each thermal management component. The second pipeline assembly connects the circulation outlet and the outlet of each thermal management component. The first switch is disposed on the first pipeline assembly and is used to open or close the circulation inlet. The second switch is disposed on the second pipeline assembly and is used to open or close the circulation outlet.

[0071] The hydraulic chiller unit is equipped with a first switch and a second switch. The first switch, located in the first piping assembly, is used to open or close the circulation inlet of the hydraulic chiller unit. The second switch, located in the second piping assembly, is used to open or close the circulation outlet of the hydraulic chiller unit. When the first switch closes the circulation inlet and the second switch closes the circulation outlet, the first and second switches can seal the heat exchange medium within the passage formed by the first piping assembly, the thermal management component, and the second piping assembly. This allows the heat exchange medium to be injected into the hydraulic chiller unit before the assembly of the hydraulic chiller unit and the refrigerant chiller unit.

[0072] like Figure 1 , Figure 2 As shown in the illustration, this application provides an energy storage system 100, which includes a refrigerant compressor unit 10 and an energy storage device 20. The refrigerant compressor unit 10 is used to remove heat from the energy storage device 20 to lower the internal temperature of the energy storage device 20. The energy storage device 20 includes a hydraulic chiller unit 21, and the refrigerant compressor unit 10 is used to exchange heat with the hydraulic chiller unit 21, thereby lowering the internal temperature of the energy storage device 20.

[0073] The refrigerant unit 10 can be installed outside the energy storage device 20.

[0074] like Figure 1 , Figure 2 As shown, in some embodiments, the refrigerant unit 10 includes a heat exchanger 11, a compressor 12, and a condenser 13.

[0075] The heat exchanger 11 is a component that allows the refrigerant in the refrigerant unit 10 and the heat exchange medium in the liquid circuit unit 21 to exchange heat.

[0076] The types of refrigerants used in the refrigerant unit 10 include, but are not limited to, Freon, alkanes, ammonia, and carbon dioxide.

[0077] like Figure 1 , Figure 2As shown, heat exchanger 11 has a first pair of ports 111, a second pair of ports 112, a third pair of ports 113, and a fourth pair of ports 114. The first pair of ports 111 and the second pair of ports 112 are connected inside heat exchanger 11 through a first channel (not shown in the figure), which is used for the refrigerant flowing through the refrigerant unit 10. The third pair of ports 113 and the fourth pair of ports 114 are connected inside heat exchanger 11 through a second channel (not shown in the figure), which is used for the heat exchange medium flowing through the liquid circuit unit 21. The first channel and the second channel are independent of each other. When the heat exchange medium of the liquid circuit unit 21 flows through the second channel, it exchanges heat with the refrigerant of the refrigerant unit 10 that has passed through the first channel. Thus, the refrigerant in the first channel can carry away the heat of the heat exchange medium in the second channel, thereby realizing heat exchange between the refrigerant unit 10 and the liquid circuit unit 21 and reducing the internal temperature of the energy storage device 20.

[0078] The compressor input terminal 121 is used to supply refrigerant into the compressor 12, and the compressor output terminal 122 is used to supply refrigerant out of the compressor 12. The condenser output terminal 132 is used to supply refrigerant into the condenser 13, and the condenser output terminal 132 is used to supply refrigerant out of the condenser 13.

[0079] The first pair of interfaces 111 is used to connect to the compressor's input terminal 121. For example... Figure 1 , Figure 2 As shown, the first pair of interfaces 111 is used to connect with the compressor input terminal 121 through the first connecting pipe 14.

[0080] The compressor's output terminal 122 is used to connect to the condenser's input terminal 131. For example... Figure 1 , Figure 2 As shown, the compressor output terminal 122 is connected to the condenser input terminal 131 via a second connecting pipe 15.

[0081] The condenser's output terminal 132 is used to connect to the second pair of interfaces 112. For example... Figure 1 , Figure 2 As shown, the output terminal 132 of the condenser is used to connect to the second pair of interfaces 112 through the third connecting pipe 16.

[0082] The passage containing the first channel, the first connecting pipe 14, the compressor 12, the second connecting pipe 15, the condenser 13, and the third connecting pipe 16 forms the refrigerant circuit of the refrigerant unit 10.

[0083] The compressor 12 can compress and drive the refrigerant in the refrigerant circuit. The compressor 12 can convert high-temperature, low-pressure refrigerant into high-temperature, high-pressure refrigerant.

[0084] The condenser 13 is used to release the heat from the high-temperature and high-pressure refrigerant from the compressor 12 and to discharge the low-temperature and low-pressure refrigerant.

[0085] The specific working principle of the refrigerant unit 10 is as follows: After the refrigerant in the first channel exchanges heat with the heat exchange medium in the second channel of the heat exchanger 11, it forms a high-temperature, low-pressure gaseous refrigerant. The high-temperature, low-pressure refrigerant is discharged from the heat exchanger 11 through the first pair of ports 111 and enters the compressor 12 through the first connecting pipe 14. The compressor 12 drives the gaseous high-temperature, low-pressure refrigerant to form a high-temperature, high-pressure liquid refrigerant or a high-temperature, high-pressure gas-liquid two-phase refrigerant. The compressor 12 then drives the high-temperature, high-pressure refrigerant to the condenser 13. After the condenser 13 releases heat, it forms a low-temperature, high-pressure liquid refrigerant, which returns to the first channel through the third connecting pipe 16 and the second pair of ports 112, thus continuing to exchange heat with the heat exchange medium in the second channel.

[0086] The third pair of interfaces 113 of the heat exchanger 11 of the refrigerant unit 10 is used to connect with the circulation output port 21b of the liquid circuit unit 21, and the fourth pair of interfaces 114 of the heat exchanger 11 of the refrigerant unit 10 is used to connect with the circulation input port 21a of the liquid circuit unit 21.

[0087] The number of refrigerant units 10 can be one or more. More than two means two or more. In an embodiment where there are multiple refrigerant units 10, the third pair of interfaces 113 of each refrigerant unit 10 is connected to the circulation output port 21b of the liquid circuit unit 21, and the fourth pair of interfaces 114 of each refrigerant unit 10 is connected to the circulation input port 21a of the liquid circuit unit 21.

[0088] The circulation output port 21b of the liquid circuit unit 21 is connected to the third pair of interfaces 113, and the circulation input port 21a of the liquid circuit unit 21 is connected to the third pair of interfaces. The second channel and the liquid circuit unit 21 together form a liquid circuit. The heat exchange medium in the liquid circuit unit 21 is discharged from the circulation output port 21b and enters the second channel. After passing through the second channel, it enters the liquid circuit unit 21 again from the circulation input port 21a. Figure 3 , Figure 4 The hollow arrows indicate the flow direction of the heat exchange medium. The heat exchange medium can be water, air, etc.

[0089] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the energy storage device 20 further includes a housing 22 and battery cells 23; the battery cells 23 are housed within the housing 22; a hydraulic system 21 is disposed within the housing 22; and a thermal management component 24 is used to regulate the temperature of the battery cells 23.

[0090] The energy storage device 20 can be an energy storage cabinet or an energy storage container. The enclosure 22 of the energy storage device 20 can also be called a prefabricated compartment, battery compartment, container, etc. The enclosure 22 can accommodate multiple individual battery cells 23, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that the multiple individual battery cells 23 are connected in both series and parallel. The enclosure 22 can also accommodate battery modules formed by multiple individual battery cells 23, which can be connected in series, parallel, or in a mixed configuration. The enclosure 22 can also accommodate multiple battery packs composed of individual battery cells 23. The enclosure 22 can include multiple rows of battery modules; a row of battery modules can be called a battery cluster. Each battery module includes multiple individual battery cells connected in series, parallel, or in a mixed configuration. Understandably, the enclosure 22 can contain multiple battery clusters. The enclosure 22 can also include one or more battery cabinets, each battery cabinet including a cabinet body and a battery cluster.

[0091] The liquid circuit unit 21 is installed inside the housing 22 of the energy storage device 20. The liquid circuit unit 21 is used to regulate the temperature of the battery cells 23, such as reducing the temperature of the battery cells 23, reducing the risk of explosion and fire of the energy storage device 20, so that the energy storage device 20 can supply energy normally and improve the reliability of the energy storage system 100.

[0092] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the hydraulic system 21 has a circulation inlet 21a and a circulation outlet 21b. The hydraulic system 21 includes a plurality of thermal management components 24, a first piping assembly 25, a second piping assembly 26, a first switch 27, and a second switch 28. The thermal management components 24 have an inlet 241 and an outlet 242. The first piping assembly 25 connects the circulation inlet 21a to the inlet 241 of each thermal management component 24. The second piping assembly 26 connects the circulation outlet 21b to the outlet 242 of each thermal management component 24. The first switch 27 is disposed on the first piping assembly 25 for opening or closing the circulation inlet 21a. The second switch 28 is disposed on the second piping assembly 26 for opening or closing the circulation outlet 21b.

[0093] The circulation inlet 21a of the hydraulic system 21 is the input end for the heat exchange medium to enter the hydraulic system 21 during the circulation process, and the circulation outlet 21b of the hydraulic system 21 is the output end for the heat exchange medium to exit the hydraulic system 21 during the circulation process. The circulation inlet 21a can be formed at the end of the first piping assembly 25 opposite to the thermal management component 24. The circulation outlet 21b can be formed at the end of the second piping assembly 26 opposite to the thermal management component 24.

[0094] The thermal management component 24 is used for heat exchange with the battery cell 23. The thermal management component 24 has internal channels for the flow of the heat exchange medium. Inlet 241 is one end of the internal channel of the thermal management component 24 where the heat exchange medium enters, and outlet 242 is one end of the internal channel of the thermal management component 24 where the heat exchange medium exits.

[0095] The thermal management component 24 can also be called a water-cooled plate, liquid-cooled plate, heat exchange plate, temperature regulating plate, etc. The heat exchange medium can be water, air, a mixture of water and ethylene glycol, refrigerant, phase change material, etc.

[0096] The first switch element 27 can be disposed in the middle region of the first piping assembly 25. The first switch element 27 can cut off the internal passage of the first piping assembly 25, so that when the first switch element 27 is closed, the passage between the circulation inlet 21a and the thermal management component 24 is cut off, and the heat exchange medium cannot flow to the thermal management component 24 after passing through the circulation inlet 21a. When the first switch element 27 is open, the heat exchange medium can flow to the thermal management component 24 after passing through the circulation inlet 21a. The first switch element 27 being disposed in the middle region of the first piping assembly 25 is not limited to being disposed in the middle of the extension direction of the first piping assembly 25; it can also be disposed near the location where the circulation inlet 21a is formed on the first piping assembly 25.

[0097] The second switch 28 can be located in the middle region of the second piping assembly 26. The second switch 28 can cut off the internal passage of the second piping assembly 26, so that when the second switch 28 is closed, the passage between the circulation outlet 21b and the thermal management component 24 is cut off, and the heat exchange medium discharged from the thermal management component 24 cannot be discharged from the liquid circuit unit 21 through the circulation outlet 21b. When the first switch 27 is open, the heat exchange medium discharged from the thermal management component 24 can be discharged from the liquid circuit unit 21 through the circulation inlet 21a.

[0098] The first switching element 27 can be a solenoid valve, shut-off valve, manual switch, check valve, etc. The second switching element 28 can also be a solenoid valve, shut-off valve, manual switch, etc. The first switching element 27 and the second switching element 28 can have the same or different structures. The first switching element 27 can also serve as a connection between the circulation input port 21a and the fourth pair of interfaces 114, i.e., the circulation input port 21a and the fourth pair of interfaces 114 are connected via the first switching element 27. The second switching element 28 can also serve as a connection between the circulation output port 21b and the third pair of interfaces 113, i.e., the circulation output port 21b and the third pair of interfaces 113 are connected via the second switching element 28. The first switching element 27 and the second switching element 28 can be quick-connect shut-off valves to facilitate connection with the third pair of interfaces 113 and the fourth pair of interfaces 114 of the heat exchanger 11. Quick-connect shut-off valves offer high integration, simple assembly, and cost advantages. The quick-connect shut-off valve can be equipped with a quick-connect spigot or be of SAE, VDA, or other structural form.

[0099] The hydraulic chiller unit 21 is equipped with a first switch 27 and a second switch 28. The first switch 27 is located in the first piping assembly 25 and is used to open or close the circulation inlet 21a of the hydraulic chiller unit 21. The second switch 28 is located in the second piping assembly 26 and is used to open or close the circulation outlet 21b of the hydraulic chiller unit 21. When the first switch 27 closes the circulation inlet 21a and the second switch 28 closes the circulation outlet 21b, the first switch 27 and the second switch 28 can seal the heat exchange medium in the passage formed by the first piping assembly 25, the thermal management component 24, and the second piping assembly 26. This allows the heat exchange medium to be injected into the hydraulic chiller unit 21 before the refrigerant chiller unit 10 is assembled, facilitating the injection of the heat exchange medium and thus facilitating the assembly of the energy storage device 20 and the energy storage system 100 equipped with the hydraulic chiller unit 21. The first switch 27 and the second switch 28 can enable the hydraulic unit 21 to form a self-closed system, thereby realizing the storage and transportation of heat exchange medium in the hydraulic unit 21.

[0100] In some embodiments, the first switching element 27 is a quick-connect shut-off valve, and the second switching element 28 is a quick-connect shut-off valve.

[0101] The quick-connect shut-off valve can not only open or close the circulation output port 21b and the circulation input port 21a, but also facilitates connection with the heat exchanger 11. In addition, the quick-connect shut-off valve has a high degree of integration, is easy to assemble, and has a cost advantage.

[0102] like Figure 1 , Figure 3 , Figure 4As shown, in some embodiments, the first piping assembly 25 includes a first main pipe 251 and a plurality of first branch pipes 252, one end of each first branch pipe 252 being connected to the first main pipe 251 and the other end of each first branch pipe 252 being connected to the inlet of at least one thermal management component 24, and a first switch 27 being disposed on the first main pipe 251.

[0103] Each first branch pipe 252 is connected to the first main pipe 251. The heat exchange medium entering the first main pipe 251 can be distributed to each first branch pipe 252 and then flow to the heat management component 24 connected to each first branch pipe 252.

[0104] The circulation inlet 21a can be formed at the end of the first main pipe 251 opposite to the first branch pipe 252. The first switch 27 can be located in the middle region of the first main pipe 251, and the second switch 28 can cut off the internal passage of the first main pipe 251. When the first switch 27 is closed, the passage between the circulation inlet 21a and the first branch pipe 252 is cut off, preventing the heat exchange medium from flowing through the circulation inlet 21a to the first branch pipe 252. When the first switch 27 is open, the heat exchange medium can flow through the circulation inlet 21a to the first branch pipe 252, and then to the heat management component 24. The statement that the first switch 27 is located in the middle region of the first main pipe 251 is not limited to the middle position in the extension direction of the first main pipe 251; it can also be located near the location where the circulation inlet 21a is formed.

[0105] In some embodiments, the first switch 27 may be disposed at one end of the first main pipe 251 where the circulation input port 21a is formed, and the first switch 27 may open or close the circulation input port 21a.

[0106] Each first branch pipe 252 can be connected to the inlet of one thermal management component 24, and each first branch pipe 252 can be connected to the inlets of multiple thermal management components 24. For example, as... Figure 1 , Figure 3 , Figure 4 As shown, the hydraulic system unit 21 includes multiple rows of thermal management components 24, each row of which includes multiple thermal management components 24. The arrangement direction of the multiple rows of thermal management components 24 and the arrangement direction of the thermal management components 24 in each row of thermal management components 24 can be perpendicular. A first branch pipe 252 can be connected to the inlet 241 of multiple thermal management components 24 in a row of thermal management components 24, thereby realizing the connection of a first branch pipe to the inlet 241 of multiple thermal management components 24.

[0107] The first piping assembly 25 includes a first main pipe 251 and a plurality of first branch pipes 252. One end of each first branch pipe 252 is connected to the inlet of at least one thermal management component 24, and the other end of each first branch pipe 252 is connected to the first main pipe 251. In this way, each first piping assembly 25 can manage the heat exchange medium in multiple thermal management components 24, which is beneficial to improving the uniformity of the internal temperature of the unit 21 equipped with the liquid circuit. A first switch element 27 is disposed on the first main pipe 251. By opening or closing the first switch element 27, the channel in the first main pipe 251 can be connected, thereby connecting the circulation inlet 21a and the plurality of first branch pipes 252, or the channel in the first main pipe 251 can be cut off, thereby cutting off the circulation inlet 21a and the plurality of first branch pipes 252, which facilitates the installation of the first switch element 27.

[0108] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the hydraulic unit 21 further includes a second main pipe 29 and a third switch 210. The second main pipe 29 is connected to each first branch pipe 252. The second main pipe 29 has an injection port 291 for injecting heat exchange medium into each first branch pipe 252. The third switch 210 is disposed on the second main pipe 29 and is used to open or close the injection port 291.

[0109] One end of the second main pipe 29 is connected to the first main pipe 251, and the other end of the second main pipe 29 or the side wall of the first main pipe 251 forms an injection port 291. The connection position between the second main pipe 29 and the first main pipe 251 can be located between the connection position between the first branch pipe 252 and the first main pipe 251 and the circulation input port 21a. Alternatively, the connection position between the second main pipe 29 and the first main pipe 251 can be located at the connection position between the first branch pipe 252 and the first main pipe 251.

[0110] The third switch 210, used to open or close the inlet 291, can mean that the first switch 27 can prevent or allow the heat exchange medium from entering the second main pipe 29 from the inlet 291, and then entering the first main pipe 251 and the first branch pipe 252 via the second main pipe 29. In this case, the third switch 210 can be located at the inlet 291 to directly open or close the inlet 291.

[0111] The third switch 210 is used to open or close the inlet 291. Alternatively, the first switch 27 can prevent or allow the heat exchange medium entering the second main pipe 29 from entering the first main pipe 251 and the first branch pipe 252. In this case, the third switch 210 can be located on the second main pipe 29 near the third switch.

[0112] The third switching component 210 can be a liquid filling valve, solenoid valve, shut-off valve, manual switching component, check valve, etc.

[0113] The second main pipe 29 facilitates the injection of heat exchange medium into each first branch, and the third switch 210 reduces the risk of leakage after the heat exchange medium injection is completed.

[0114] like Figure 1 , Figure 3 As shown, in some embodiments, the hydraulic unit 21 includes a supply tank Q, which is connected to the first main pipe 251 and is used to supply heat exchange medium to each first branch pipe 252.

[0115] The supply box Q is connected to the first main pipe 251 via a fourth connecting pipe. The connection point between the fourth connecting pipe and the first main pipe 251 can be located between the connection point between the first branch pipe 252 and the first main pipe 251 and the circulation input port 21a. Alternatively, the connection point between the fourth connecting pipe and the first main pipe 251 can be located at the connection point between the first branch pipe 252 and the first main pipe 251.

[0116] The number of supply crates Q can be one or more.

[0117] The replenishment tank Q is used to replenish the heat exchange medium in the liquid circuit in a timely manner after the amount of heat exchange medium in the liquid circuit is lost, so as to alleviate the problem of reduced heat exchange capacity due to the reduction of heat exchange medium in the liquid circuit. Specifically, the replenishment tank Q can replenish the heat exchange medium in a timely manner after the amount of heat exchange medium in the first branch pipe 252 decreases, so as to keep the amount of heat exchange medium in the first piping assembly 25, the thermal management component 24 and the second piping assembly 26 constant, so as to maintain the stable temperature regulation capability of the liquid circuit unit 21.

[0118] In some embodiments, the hydraulic unit 21 may not have a replenishment tank Q or may have the replenishment tank Q located outside the housing 22, thereby reducing the space occupied inside the energy storage device 20 and improving energy density.

[0119] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, at least a portion of the first branch pipe 252 is provided with at least one fourth switch 253, which is used to connect the first main pipe 251 and the thermal management component 24 or to disconnect the first main pipe 251 and the thermal management component 24.

[0120] The fourth switch 253 controls the opening and closing of the internal channel of the corresponding first branch pipe 252, thereby connecting the first main pipe 251 and the thermal management component 24 through the first branch pipe 252 or cutting off the passage between the first main pipe 251 and the thermal management component 24.

[0121] The fourth switching component 253 can be a solenoid valve, a shut-off valve, a manual switching component, a check valve, etc.

[0122] The first branch pipe 252 may be partially equipped with a fourth switch element 253, or all of the first branch pipes 252 may be equipped with a fourth switch element 253. In the first branch pipe 252 equipped with a fourth switch, the first branch pipe 252 may be equipped with one fourth switch or multiple fourth switch elements 253.

[0123] The fourth switch 253 facilitates the independent control of the corresponding first branch pipe 252, thereby facilitating the independent management of each first branch pipe 252 and making the operation of the hydraulic circuit assembly more flexible.

[0124] For example, each first branch 252 is provided with two fourth switching elements 253.

[0125] The two fourth switching elements 253 of the first branch pipe 252 are arranged at intervals along the extension direction of the first branch pipe 252.

[0126] Each first branch pipe 252 is equipped with two fourth switch components 253, which not only facilitates the independent control of each first branch pipe 252, but also allows each first branch pipe 252 to be controlled in sections, making it easier to repair and replace the sections where the first branch pipe 252 is faulty, reducing material consumption and lowering costs.

[0127] In other embodiments, a first switching valve 2511 may also be provided on the first main pipe 251, the first switching valve 2511 being used to cut off or open the first main pipe 251.

[0128] The first switching valve 2511 can be a ball valve, butterfly valve, or other types. It facilitates the control of the on / off state of the first pipeline assembly 25.

[0129] In an embodiment where a first switching valve 2511 is provided on the first main pipe 251, one or more fourth switching elements 253 may be provided on the first branch pipe 252. Figure 4 The diagram shows a case where a first switch valve 2511 is installed on the first main pipe 251 and a fourth switch element 253 is installed on the first branch pipe 252.

[0130] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, at least part of the first branch pipe 252 is connected to a second branch pipe 254, one end of the second branch pipe 254 is formed with a first opening 2541, and the first branch pipe 252 is provided with a fifth switch 255, which is used to connect the first opening 2541 and the first branch pipe 252 or to disconnect the first opening 2541 and the first branch pipe 252.

[0131] One end of the second branch pipe 254 is connected to the first branch pipe 252, and the other end of the second branch pipe 254 forms a first opening 2541.

[0132] The fifth switch element 255 can be disposed in the middle region of the second branch pipe 254. The fifth switch element 255 can control the opening and closing of the internal channel of the second branch pipe 254, so as to control whether the heat exchange medium inside the first branch pipe 252 is discharged from the first opening 2541. The fifth switch element 255 being disposed in the middle region of the second branch pipe 254 is not limited to being disposed in the middle of the extension direction of the second branch pipe 254; it can also be disposed near the location where the first opening 2541 is formed in the second branch pipe 254.

[0133] Of course, the fifth switch 255 can also be provided with one end of the second branch 254 having the first opening 2541, and the fifth switch can open or close the first opening 2541.

[0134] The fifth switching component 255 can be a solenoid valve, a shut-off valve, a manual switching component, a check valve, etc.

[0135] The first branch pipe 252 can be partially connected to the second branch pipe 254, or all of the first branch pipes 252 can be connected to the second branch pipe 254.

[0136] The second branch pipe 254 is designed to facilitate the independent discharge of the heat exchange medium in the corresponding first branch pipe 252 without affecting other first branch pipes 252, thereby facilitating the independent management of the first straight pipe and making the operation of the liquid circuit assembly more flexible.

[0137] In some embodiments, each first branch pipe 252 is connected to a second branch pipe 254, so the heat exchange medium in each first branch pipe 252 is discharged independently without affecting other first branch pipes 252, thereby facilitating the independent management of each first branch pipe and making the operation of the liquid circuit assembly more flexible.

[0138] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the second piping assembly 26 includes a third main pipe 261 and a plurality of third branch pipes 262, one end of each third branch pipe 262 being connected to the third main pipe 261 and the other end of each third branch pipe 262 being connected to the outlet 242 of at least one thermal management component 24.

[0139] Each third branch pipe 262 is connected to the third main pipe 261, and the heat exchange medium in each third branch pipe 262 flows into the third main pipe 261 and then flows out from the circulation outlet 21b.

[0140] The circulation outlet 21b can be formed at the end of the third main pipe 261 opposite to the third branch pipe 262. The second switch 28 can be disposed in the middle region of the third main pipe 261. The second switch 28 can cut off the internal passage of the third main pipe 261, so that when the third switch 210 is closed, the passage between the circulation outlet 21b and the third branch pipe 262 is cut off, and the heat exchange medium cannot be discharged from the circulation outlet 21b. When the second switch 28 is open, the heat exchange medium discharged from the heat management component 24 cannot be discharged from the circulation outlet 21b. The second switch 28 being disposed in the middle region of the third main pipe 261 is not limited to being disposed in the middle of the extension direction of the third main pipe 261; it can also be disposed near the location where the circulation outlet 21b is formed on the third main pipe 261.

[0141] In some embodiments, the second switch 28 may be disposed at one end of the third main pipe 261 where the circulation output port 21b is formed, and the second switch 28 may open or close the circulation output port 21b.

[0142] Each third branch pipe 262 can be connected to the inlet of one thermal management component 24, and each third branch pipe 262 can also be connected to the inlets of multiple thermal management components 24. Exemplarily, the hydraulic system unit 21 includes multiple rows of thermal management components 24, each row including multiple thermal management components 24, and the arrangement direction of the multiple rows of thermal management components 24 and the arrangement direction of the thermal management components 24 in each row can be perpendicular. A third branch pipe 262 can be connected to the outlets 242 of multiple thermal management components 24 in a row of thermal management components 24, thereby enabling one third branch pipe 262 to be connected to the outlets 242 of multiple thermal management components 24.

[0143] The second piping assembly 26 includes a third main pipe 261 and a plurality of third branch pipes 262, the other end of each third branch pipe 262 being connected to the outlet 242 of at least one thermal management component 24, so that each second piping assembly 26 can manage the heat exchange medium within the plurality of thermal management components 24, which is beneficial to improving the uniformity of the internal temperature of the unit 21 equipped with the liquid circuit.

[0144] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the hydraulic system 21 further includes a fourth main pipe 220 and a sixth switch 230. The fourth main pipe 220 is connected to each third branch pipe 262. The fourth main pipe 220 forms a first exhaust port 2201 for venting gas from the second pipeline assembly 26. The sixth switch is used to open or close the first exhaust port 2201.

[0145] One end of the fourth main pipe 220 is connected to the third main pipe 261, and the other end of the fourth main pipe 220 or the side wall of the fourth main pipe 220 forms the first exhaust port 2201. The connection position between the fourth main pipe 220 and the third main pipe 261 can be located between the connection position between the third branch pipe 262 and the third main pipe 261 and the circulation output port 21b. Alternatively, the connection position between the fourth main pipe 220 and the third main pipe 261 can be located at the connection position between the third branch pipe 262 and the third main pipe 261.

[0146] The sixth switch 230 for opening or closing the first exhaust port 2201 can mean that the sixth switch 230 can prevent or allow gas from inside the hydraulic unit 21 to reach the first exhaust port 2201. In this case, the sixth switch 230 can be located in the middle region of the fourth main pipe 220.

[0147] The sixth switch 230 can be set at the end of the fourth main pipe 220 where the first exhaust port 2201 is provided. The sixth switch 230 can open or close the first exhaust port 2201 to allow or prevent the gas inside the hydraulic unit 21 from being discharged from the first exhaust port 2201.

[0148] The fourth main pipe 220 facilitates the venting of gas from each third branch pipe 262, thereby ensuring that the heat exchange medium can fill the entire first piping assembly 25, second piping assembly 26, and thermal management component 24, giving the liquid circuit assembly better temperature regulation capabilities. The sixth switch 230 reduces the risk of heat exchange medium leakage.

[0149] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the hydraulic system 21 further includes a fifth main pipe 240 and a seventh switch 250. At least a portion of the third branch pipe 262 is connected to the fifth main pipe 240. The fifth main pipe 240 forms a second exhaust port 2401 for venting gas from the first piping assembly 25 and the thermal management component 24. The seventh switch is used to open or close the second exhaust port 2401.

[0150] One end of the fifth main pipe 240 is connected to the third branch pipe 262, and the other end of the fifth main pipe 240 or the side wall of the fifth main pipe 240 forms a second exhaust port 2401. The connection position between the fifth main pipe 240 and the third branch pipe 262 can be located at any position of the third branch pipe 262. For example, the connection position between the fifth main pipe 240 and the third branch pipe 262 is located at the end of the third branch pipe 262 that is furthest from the third main pipe 261 along its extension direction.

[0151] The seventh switch 250 for opening or closing the second exhaust port 2401 can mean that the seventh switch 250 can prevent or allow gas from inside the hydraulic unit 21 to reach the second exhaust port 2401. In this case, the seventh switch 250 can be located in the middle region of the fifth main pipe 240.

[0152] The seventh switch 250 can be disposed at the end of the fifth main pipe 240 where the second exhaust port 2401 is provided. Then the seventh switch can open or close the second exhaust port 2401 to allow or prevent the gas inside the hydraulic unit 21 from being discharged from the second exhaust port 2401.

[0153] The seventh switching element 250 can be a solenoid valve, a shut-off valve, a manual switching element, a check valve, an exhaust valve, etc.

[0154] The second exhaust port 2401 is mainly used to discharge at least part of the gas in the first pipeline assembly 25 and the thermal management component 24 during the process of injecting liquid into the liquid circuit unit 21.

[0155] The fifth main pipe 240 facilitates the discharge of gas into the first piping assembly 25 and the thermal management component 24, thereby ensuring that the heat exchange medium can fill the entire first piping assembly 25 and the thermal management component 24, giving the liquid circuit assembly better temperature regulation capabilities. The seventh switch 250 reduces the risk of heat exchange medium leakage.

[0156] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, at least a portion of the third branch pipe 262 is provided with at least one eighth switch 263, which is used to connect the third main pipe 261 and the thermal management component 24 or to disconnect the third main pipe 261 and the thermal management component 24.

[0157] The eighth switch 263 controls the opening and closing of the internal channel of the corresponding third branch pipe 262, thereby connecting the third main pipe 261 and the thermal management component 24 through the third branch pipe 262 or cutting off the passage between the third main pipe 261 and the thermal management component 24.

[0158] The eighth switching component 263 can be a solenoid valve, a shut-off valve, a manual switching component, a check valve, etc.

[0159] The third branch pipe 262 may be partially equipped with an eighth switch element 263, or all of the third branch pipes 262 may be equipped with an eighth switch element 263. In the third branch pipe 262 equipped with an eighth switch, the third branch pipe 262 may be equipped with one eighth switch element 263 or multiple eighth switches.

[0160] The eighth switch 263 facilitates the independent control of the corresponding third branch pipe 262, thereby facilitating the independent management of each third branch pipe 262 and making the operation of the hydraulic circuit assembly more flexible.

[0161] For example, each third branch 262 is provided with two eighth switches 263.

[0162] The two eighth switch components 263 of the third branch pipe 262 are arranged at intervals along the extension direction of the third branch pipe 262.

[0163] Each third branch pipe 262 is equipped with two eighth switch components 263, which not only facilitates the independent control of each third branch pipe 262, but also allows each third branch pipe 262 to be controlled in sections. This facilitates the maintenance and replacement of road sections where the third branch pipe 262 malfunctions, reducing material consumption and lowering costs.

[0164] In other embodiments, a second switching valve 2611 may also be provided on the third main pipe 261, the second switching valve 2611 being used to cut off or open the third main pipe 261.

[0165] The second switching valve 2611 can be a ball valve, butterfly valve, or other types. It facilitates the control of the on / off state of the second pipeline assembly 26.

[0166] In an embodiment where a second switching valve 2611 is provided on the third main pipe 261, one or more eighth switching elements 263 may be provided on the third branch pipe 262. Figure 4 The diagram shows a case where a second switch valve 2611 is installed on the third main pipe 261, and an eighth switch element 263 is installed on the third branch pipe 262.

[0167] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, at least part of the third branch pipe 262 is connected to the fourth branch pipe 264, one end of the fourth branch pipe 264 is formed with a second opening 2641, and the fourth branch pipe 264 is provided with a ninth switch 265, which is used to connect the second opening 2641 and the third branch pipe 262 or to disconnect the second opening 2641 and the third branch pipe 262.

[0168] One end of the fourth branch pipe 264 is connected to the third branch pipe 262, and the other end of the fourth branch pipe 264 forms a second opening 2641.

[0169] The ninth switch element 265 can be disposed in the middle region of the fourth branch pipe 264. The ninth switch element 265 can control the opening and closing of the internal channel of the fourth branch pipe 264, so as to control whether the heat exchange medium inside the third branch pipe 262 is discharged from the second opening 2641. The ninth switch element 265 being disposed in the middle region of the fourth branch pipe 264 is not limited to being disposed in the middle of the extension direction of the fourth branch pipe 264; it can also be disposed near the location where the second opening 2641 is formed in the fourth branch pipe 264.

[0170] Of course, the ninth switch 265 may also be provided with a fourth branch tube 264 forming a second opening 2641 at one end, and the ninth switch can open or close the second opening 2641.

[0171] The ninth switching component 265 can be a solenoid valve, a shut-off valve, a manual switching component, a check valve, etc.

[0172] The third branch pipe 262 can be partially connected to the fourth branch pipe 264, or all the third branch pipes 262 can be connected to the fourth branch pipe 264.

[0173] The fourth branch pipe 264 facilitates the independent discharge of the heat exchange medium in the corresponding third branch pipe 262 without affecting other third branch pipes 262, thereby facilitating the independent management of the third branch pipe 262 and making the operation of the liquid circuit assembly more flexible. The ninth switch element 265 reduces the risk of heat exchange medium leakage from the fourth branch pipe 264 when the pipeline is normal.

[0174] Each third branch pipe 262 is connected to a fourth branch pipe 264, so the heat exchange medium in each third branch pipe 262 can be discharged independently without affecting other third branch pipes 262, thus facilitating the independent management of each third branch pipe 262 and making the operation of the liquid circuit assembly more flexible.

[0175] In some embodiments, the hydraulic unit 21 further includes a pumping device 260 for pumping the heat exchange medium in the first piping assembly 25 to the thermal management component 24.

[0176] The pumping device 260 is used to provide power for the circulation of the heat exchange medium in the liquid loop. The pumping device 260 may be installed in the first piping assembly 25.

[0177] The pumping device 260 can be a water pump, motor, etc. There can be one or more pumping devices 260.

[0178] Before the liquid circuit is formed between the liquid circuit unit 21 and the heat exchanger 11 of the refrigerant unit 10, the pumping device 260 enables the heat exchange medium to quickly fill the first piping assembly 25, each thermal management component 24, and the second piping assembly 26, improving the heat exchange medium injection efficiency. After the liquid circuit is formed between the liquid circuit unit 21 and the heat exchanger 11 of the refrigerant unit 10, the pumping device 260 helps to keep the heat exchange medium in a flowing state within the first management assembly, thermal management component 24, and the second piping assembly 26, improving the temperature regulation capability.

[0179] like Figure 1 , Figure 3 As shown, in some embodiments, the first piping assembly 25 includes a first main pipe 251 and a plurality of first branch pipes 252, one end of each first branch pipe 252 being connected to the first main pipe 251 and the other end of each first branch pipe 252 being connected to the input end of at least one thermal management component 24; each first branch pipe 252 is provided with a pumping device 260.

[0180] A pumping device 260 is provided in each first branch pipe 252, that is, each first branch pipe 252 is provided with a pumping device 260. The pumping device 260 on each first branch pipe 252 can provide power for the circulation of the heat exchange medium in the corresponding first branch pipe 252.

[0181] Each first branch pipe 252 is equipped with a pumping device 260. Before the liquid circuit is formed between the liquid circuit unit 21 and the heat exchanger 11 of the refrigerant unit 10, the pumping device 260 enables the heat exchange medium to quickly fill the first piping assembly 25, each thermal management component 24, and the second piping assembly 26, improving the heat exchange medium injection efficiency and the uniformity of heat exchange medium distribution. After the liquid circuit is formed between the liquid circuit unit 21 and the heat exchanger 11 of the refrigerant unit 10, the pumping device 260 helps to keep the heat exchange medium in a flowing state within the first management assembly, thermal management component 24, and the second piping assembly 26, improving temperature regulation capability. The pumping device 260 in each first branch pipe 252 also facilitates independent control of the circulation capacity of the heat exchange medium within each first branch pipe 252.

[0182] like Figure 1 , Figure 3 As shown, in the embodiment where a pumping device 260 is provided in each first branch pipe 252, at least one fourth switch 253 is provided at the rear end of the pumping device 260. This simplifies the replacement of the pumping device 260 and alleviates the problems of heat exchange medium loss, discharge, and refilling within the hydraulic circuit unit 21 during the replacement process. The rear end of the pumping device 260 refers to the end from which the pumping device 260 pumps out the heat exchange medium.

[0183] like Figure 4As shown, in some other embodiments, the first piping assembly 25 includes a first main pipe 251 and a plurality of first branch pipes 252, one end of each first branch pipe 252 being connected to the first main pipe 251 and the other end of each first branch pipe 252 being connected to the input end of at least one thermal management component 24; a pumping device 260 is disposed on the first main pipe 251.

[0184] If a pumping device 260 is installed on the first main pipe 251, then one pumping device 260 can be used to provide power for the circulation of the heat exchange medium in each first branch pipe 252, which can reduce the number of pumping devices 260 in the hydraulic system unit 21 and save costs. In the embodiment where the hydraulic system unit 21 is installed in the housing 22 of the energy storage device 20, the fewer the number of pumping devices 260, the less internal space is occupied in the housing 22, which is beneficial to improving the energy density of the energy storage device 20.

[0185] In the embodiment where the pumping device 260 is located on the first main pipe 251, the first switching valve 2511 is located at the rear end of the pumping device 260, which can simplify the replacement difficulty of the pumping device 260 and alleviate the problems of heat exchange medium loss, discharge and refilling in the liquid circuit unit 21 during the replacement process of the pumping device 260.

[0186] like Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, the hydraulic unit 21 further includes a first temperature detection element 270, which is used to detect the temperature of the heat exchange medium in the first pipeline assembly 25.

[0187] In an embodiment where the first piping assembly 25 includes a first main pipe 251 and a plurality of first branch pipes 252, a first temperature sensing element 270 may be disposed on the outer surface of the first main pipe 251.

[0188] The first temperature sensing element 270 can be a temperature sensor, thermocouple, resistance temperature detector (RTD), thermistor, etc.

[0189] The temperature of the heat exchange medium in the first pipeline assembly 25 is detected by the first temperature detection element 270, which makes it easy to grasp the temperature of the heat exchange medium in the first pipeline assembly 25 and facilitates more accurate temperature regulation of the battery cell 23.

[0190] In some embodiments, the hydraulic unit 21 further includes a second temperature sensor 280 for detecting the temperature of the heat exchange medium within the second piping assembly 26.

[0191] In an embodiment where the second piping assembly 26 includes a third main pipe 261 and a plurality of third branch pipes 262, a second temperature sensor 280 may be disposed on the outer surface of the third main pipe 261.

[0192] The second temperature sensing element 280 can be a temperature sensor, thermocouple, resistance temperature detector (RTD), thermistor, etc.

[0193] The temperature of the heat exchange medium in the second pipeline assembly 26 is detected by the second temperature detection element 280, which makes it easier to grasp the temperature of the heat exchange medium in the second pipeline assembly 26 and facilitates more accurate temperature regulation of the battery cell 23.

[0194] The hydraulic system unit 21 may be equipped with only the first temperature sensor 270 or only the second temperature sensor 280. Alternatively, the hydraulic system unit 21 may include both the first and second temperature sensors 270 and 280. The temperature difference obtained from the first and second temperature sensors 270 indicates the degree of temperature change in the battery cell 23 caused by heat exchange between the heat exchange medium and the battery cell 23 after the heat exchange medium flows from the first pipeline assembly 25 through the thermal management component 24 to the second pipeline assembly 26. This allows for more accurate temperature regulation of the battery cell 23.

[0195] In some embodiments, the hydraulic system 21 further includes a third temperature sensor 290 for detecting the temperature of the battery cell 23.

[0196] The third temperature sensing element 290 can be a temperature sensor, thermocouple, resistance temperature detector (RTD), thermistor, etc.

[0197] The third temperature detection element 290 can detect the temperature of the battery cell 23 in real time and obtain the temperature of the battery cell 23 before and after the thermal management component 24 is adjusted, which is conducive to more accurate adjustment of the temperature of the battery cell 23.

[0198] This application provides an energy storage device 20, which includes a housing 22, a battery cell 23, and a liquid circuit unit 21 provided in any of the above embodiments; the battery cell 23 is housed in the housing 22; the liquid circuit unit 21 is disposed in the housing 22, and a thermal management component 24 is used to regulate the temperature of the battery cell 23.

[0199] In any of the above embodiments, the hydraulic system unit 21 is equipped with a first switch 27 and a second switch 28. The first switch 27 is located in the first pipeline assembly 25 and is used to open or close the circulation inlet 21a of the hydraulic system unit 21. The second switch 28 is located in the second pipeline assembly 26 and is used to open or close the circulation outlet 21b of the hydraulic system unit 21. When the first switch 27 closes the circulation inlet 21a and the second switch 28 closes the circulation outlet 21b, the first switch 27 and the second switch 28 can seal the heat exchange medium in the passage formed by the first pipeline assembly 25, the thermal management component 24, and the second pipeline assembly 26. This allows the heat exchange medium to be injected into the hydraulic system unit 21 before the refrigerant unit 10 is assembled, facilitating the injection of the heat exchange medium and thus facilitating the assembly of the energy storage device 20.

[0200] This application embodiment also provides a refrigerant system, which includes a condenser 13, a compressor 12, a heat exchanger 11, and an energy storage device 20 provided in any of the above embodiments. The output end 122 of the compressor is connected to the input end 131 of the condenser. The heat exchanger 11 has a first pair of interfaces 111 and a second pair of interfaces 112. The first pair of interfaces 111 is used to connect to the input end 121 of the compressor, and the second pair of interfaces 112 is used to connect to the output end 132 of the condenser. The circulation output port 21b and the circulation input port 21a are both connected to the heat exchanger 11.

[0201] The first pair of interfaces 111 and the second pair of interfaces 112 are connected inside the heat exchanger 11 through a first channel, which is used for the flow of refrigerant.

[0202] Heat exchanger 11 also has a third pair of ports 113 and a fourth pair of ports 114, which are connected inside heat exchanger 11 via a second channel for the heat exchange medium flowing through the liquid circuit unit 21. The first channel and the second channel are independent of each other.

[0203] The circuit containing condenser 13, compressor 12, and heat exchanger 11 is the refrigerant circuit. When the refrigerant flows through the first channel, it exchanges heat with the heat exchange medium flowing through the second channel, thereby reducing the temperature of the battery cells.

[0204] The condenser 13, compressor 12, heat exchanger 11, and energy storage device 20 provided in the above embodiments can be separately installed and then connected into a whole structure, which facilitates the assembly of the refrigerant system. Furthermore, the energy storage device 20 in the above embodiments can inject the heat exchange medium into the liquid circuit unit 21 before assembling the liquid circuit unit 21, heat exchanger 11, condenser 13, and compressor 12, facilitating the injection of the heat exchange medium and thus simplifying the assembly of the refrigerant system.

[0205] This application provides an energy storage system 100, which includes a refrigerant unit 10 and an energy storage device 20 provided in any of the above embodiments. The refrigerant unit 10 includes a heat exchanger 11; both the circulation output port 21b and the circulation input port 21a are connected to the heat exchanger 11.

[0206] The refrigerant unit 10 and the energy storage device 20 provided in the above embodiments can be separately installed and then connected into an integral structure, which facilitates the assembly of the energy storage system 100. Furthermore, the energy storage device 20 in the above embodiments can inject the heat exchange medium into the liquid circuit unit 21 before assembling the liquid circuit unit 21 and the refrigerant unit 10, facilitating the injection of the heat exchange medium and thus simplifying the assembly of the energy storage system 100.

[0207] In some embodiments, the refrigerant unit 10 is located outside the housing 22.

[0208] The refrigerant unit 10 is located outside the housing 22 of the energy storage device 20, which allows more space inside the housing 22 of the energy storage device 20 to accommodate the battery cells 23, thus improving the energy density of the battery cells 23.

[0209] In some embodiments, the energy storage system 100 includes a plurality of the energy storage devices 20, and the circulation output port 21b and circulation input port 21a of each energy storage device 20 are connected to the heat exchanger 11.

[0210] Each of the multiple energy storage devices 20 has a detachable circulation output port 21b and a circulation input port 21a connected to the heat exchanger 11. This allows the refrigerant unit 10 to simultaneously exchange heat with multiple energy storage devices 20, improving heat exchange efficiency and saving costs. The detachable connection of the circulation output port 21b and circulation input port 21a to the heat exchanger 11 facilitates the assembly and disassembly of the refrigerant unit 10 and the energy storage devices 20, and also facilitates the maintenance and replacement of the energy storage system 100.

[0211] This application provides an energy storage device 20, which includes a housing 22, individual battery cells 23, and a hydraulic system 21. The individual battery cells 23 and the hydraulic system 21 are disposed within the housing 22. The energy storage device 20 includes multiple rows of individual battery cells 23, with each row including multiple individual battery cells 23. In some embodiments of this application, the energy storage device 20 includes five rows of individual battery cells 23, with each row including eight individual battery cells 23.

[0212] The hydraulic system unit 21 includes multiple rows of thermal management components 24, with each row containing multiple thermal management components 24. One row of thermal management components 24 is corresponding to one row of battery cells 23. The hydraulic system unit 21 includes five rows of thermal management components 24, with each row containing eight thermal management components 24. The hydraulic system unit 21 also includes a first piping assembly 25, a second piping assembly 26, a first switch 27, and a second switch 28. The first piping assembly 25 connects the circulation inlet 21a of the hydraulic system unit 21 to the inlet 241 of each thermal management component 24. The second piping assembly 26 connects the circulation outlet 21b of the hydraulic system unit 21 to the outlet 242 of each thermal management component 24. Both the first switch 27 and the second switch 28 are quick-connect shut-off valves. The first switch 27 is located on the first piping assembly 25 and can open or close the circulation inlet 21a. The second switch 28 is located on the second piping assembly 26 and can open or close the circulation outlet 21b. The first piping assembly 25 includes a first main pipe 251 and five first branch pipes 252, all of which are connected to the first main pipe 251. The five first branch pipes 252 are respectively connected to the inlet 241 of each of the five heat management components 24. A circulation inlet 21a is formed at one end of the first main pipe 251, and a first switch element 27 is disposed on the first main pipe 251. The liquid circuit unit 21 also includes a second main pipe 29, which is connected to the first main pipe 251. One end of the second main pipe 29 has an injection port 291 for injecting heat exchange medium into the first piping assembly 25. The second main pipe 29 is provided with a third switch element 210, which is a liquid injection valve. Each first branch pipe 252 is provided with two fourth switch elements 253; or each first branch pipe 252 is provided with one fourth switch element 253 and a first switch valve 2511 is provided on the first main pipe 251 to cut off or open the first main pipe 251. Each first branch pipe 252 is provided with a second branch pipe 254, one end of which forms a first opening 2541. A fifth switch element 255 is also provided on the second branch pipe 254. The fifth switch element 255 is a pipeline shut-off valve. The second pipeline assembly 26 includes a third main pipe 261 and five third branch pipes 262, all of which are connected to the third main pipe 261. The five third branch pipes 262 are respectively connected to the outlet 242 of each of the five thermal management components 24. A circulation output port 21b is formed at one end of the third main pipe 261, and a second switch element 28 is provided on the third main pipe 261. The hydraulic system unit 21 also includes a fourth main pipe 220, which is connected to the third main pipe 261. One end of the fourth main pipe 220 forms a first exhaust port 2201, and a sixth switch element 230 is provided on the fourth main pipe 220. The sixth switch element 230 is an exhaust valve.Each third branch pipe 262 is provided with two eighth switch elements 263; or each third branch pipe 262 is provided with one eighth switch element 263 and a second switch valve 2611 for cutting off or opening the third main pipe 261 is provided on the third main pipe 261. Each third branch pipe 262 is provided with a fourth branch pipe 264, one end of which forms a second opening 2641, and a ninth switch element 265 is also provided on the fourth branch pipe 264. The ninth switch element 265 is a pipeline shut-off valve. Each third branch pipe 262 is provided with a fifth main pipe 240, one end of which forms a second vent port 2401, and a seventh switch element 250 is also provided on the fifth main pipe 240. The seventh switch element 250 is an vent valve.

[0213] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic system unit, characterized in that, The hydraulic system unit has a circulation inlet and a circulation outlet, and the hydraulic system unit includes: Multiple thermal management components, each having an inlet and an outlet; The first piping assembly connects the circulation inlet and the inlet of each of the thermal management components; The second piping assembly connects the circulation output port and the outlet of each of the thermal management components; A first switch element is disposed on the first pipeline assembly for opening or closing the circulation input port; A second switch is disposed on the second pipeline assembly and is used to open or close the circulation output port; When the first switch closes the circulation input port and the second switch closes the circulation output port, the first pipeline assembly, the thermal management component, and the second pipeline assembly form a closed passage, thereby enabling the hydraulic unit to form a self-closing system.

2. The hydraulic system unit according to claim 1, characterized in that, The first switching element is a quick-connect shut-off valve, and the second switching element is a quick-connect shut-off valve.

3. The hydraulic system unit according to claim 1, characterized in that, The first piping assembly includes a first main pipe and a plurality of first branch pipes, one end of each first branch pipe is connected to the first main pipe, and the other end of each first branch pipe is connected to the inlet of at least one of the thermal management components. The first switch is disposed on the first main pipe.

4. The hydraulic system unit according to claim 3, characterized in that, The hydraulic system unit further includes a second main pipe and a third switch. The second main pipe is connected to each of the first branch pipes. The second main pipe has an injection port for injecting heat exchange medium into each of the first branch pipes. The third switch is disposed on the second main pipe and is used to open or close the injection port.

5. The hydraulic system unit according to claim 3, characterized in that, The hydraulic system includes a replenishment tank, which is connected to the first main pipe and is used to replenish the heat exchange medium to each of the first branch pipes.

6. The hydraulic system unit according to claim 3, characterized in that, At least a portion of the first branch pipe is provided with at least one fourth switch, the fourth switch being used to connect the first main pipe and the thermal management component or to disconnect the first main pipe and the thermal management component.

7. The hydraulic system unit according to claim 6, characterized in that, Each of the first branch pipes is provided with two of the fourth switching elements.

8. The hydraulic system unit according to claim 3, characterized in that, At least part of the first branch pipe is connected to a second branch pipe, one end of the second branch pipe has a first opening, and the first branch pipe is provided with a fifth switch, which is used to connect the first opening and the first branch pipe or disconnect the first opening and the first branch pipe.

9. The hydraulic system unit according to claim 8, characterized in that, Each of the first branch pipes is connected to a second branch pipe.

10. The hydraulic system unit according to claim 1, characterized in that, The second piping assembly includes a third main pipe and a plurality of third branch pipes, one end of each third branch pipe being connected to the third main pipe and the other end of each third branch pipe being connected to the outlet of at least one of the thermal management components.

11. The hydraulic system unit according to claim 10, characterized in that, The hydraulic system unit also includes a fourth main pipe and a sixth switch. The fourth main pipe is connected to each of the third branch pipes. The fourth main pipe forms a first exhaust port for the gas in the second pipeline assembly to be discharged. The sixth switch is used to open or close the first exhaust port.

12. The hydraulic system unit according to claim 10, characterized in that, The hydraulic system unit also includes a fifth main pipe and a seventh switch. At least a portion of the third branch pipe is connected to the fifth main pipe. The fifth main pipe forms a second exhaust port for venting gas from the first piping assembly and the thermal management component. The seventh switch is used to open or close the second exhaust port.

13. The hydraulic system unit according to claim 10, characterized in that, At least a portion of the third branch pipe is provided with at least one eighth switch, the eighth switch being used to connect the third main pipe and the thermal management component or to disconnect the third main pipe and the thermal management component.

14. The hydraulic system unit according to claim 13, characterized in that, Each of the third branch pipes is provided with two of the eighth switching elements.

15. The hydraulic system unit according to claim 10, characterized in that, At least part of the third branch pipe is connected to a fourth branch pipe, one end of the fourth branch pipe has a second opening, and the fourth branch pipe is provided with a ninth switch, which is used to connect the second opening and the third branch pipe or disconnect the second opening and the third branch pipe.

16. The hydraulic system unit according to claim 15, characterized in that, Each of the third branch pipes is connected to the fourth branch pipe.

17. The hydraulic system unit according to claim 1, characterized in that, The hydraulic system unit also includes a pumping device for pumping the heat exchange medium in the first pipeline assembly to the thermal management component.

18. The hydraulic system unit according to claim 17, characterized in that, The first piping assembly includes a first main pipe and a plurality of first branch pipes, one end of each first branch pipe being connected to the first main pipe and the other end of each first branch pipe being connected to the input end of at least one of the thermal management components; Each of the first branch pipes is equipped with the pumping device.

19. The hydraulic system unit according to claim 17, characterized in that, The first piping assembly includes a first main pipe and a plurality of first branch pipes, one end of each first branch pipe being connected to the first main pipe and the other end of each first branch pipe being connected to the input end of at least one of the thermal management components; The pumping device is located on the first main pipe.

20. The hydraulic system unit according to claim 1, characterized in that, The hydraulic system unit also includes a first temperature detection element, which is used to detect the temperature of the heat exchange medium in the first pipeline assembly.

21. The hydraulic system unit according to claim 1, characterized in that, The hydraulic system unit also includes a second temperature sensor, which is used to detect the temperature of the heat exchange medium in the second pipeline assembly.

22. An energy storage device, characterized in that, include: Box; The battery cell is housed within the casing; According to any one of claims 1-21, the liquid circuit unit is disposed in the housing, and the thermal management component is used to regulate the temperature of the battery cell.

23. An energy storage system, characterized in that, include: Refrigerant-cooled units, including heat exchangers; According to claim 22, the energy storage device is connected to both the circulation output port and the circulation input port.

24. The energy storage system according to claim 23, characterized in that, The refrigerant unit is located outside the enclosure.

25. The energy storage system according to claim 24, characterized in that, The energy storage system includes multiple energy storage devices, and the circulation output port and circulation input port of each energy storage device are detachably connected to the heat exchanger.

26. A refrigerant system, characterized in that, include: Condenser; A compressor, the output end of which is connected to the input end of the condenser; The heat exchanger has a first pair of interfaces and a second pair of interfaces, the first pair of interfaces being used to communicate with the input end of the compressor, and the second pair of interfaces being used to communicate with the output end of the condenser; According to claim 22, the energy storage device is connected to both the circulation output port and the circulation input port.

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