Thermal management system, energy storage equipment and energy storage power station

Abstract

The invention discloses a thermal management system, energy storage equipment and an energy storage power station, and belongs to the field of thermal management. The heat management system comprises a heat exchange circulation loop which comprises a compressor, a first path of a condenser, a control valve, a first expansion valve and a first path of an evaporator which are sequentially connected end to end; an air duct; the heat exchanger is mounted in the air duct and is connected with the control valve in parallel; wherein the second path of the evaporator is used for being connected with a liquid cooling system of a load, and the air duct selectively communicates with the outside or a containing cavity of the load. Through switching of the control valve and the air duct, the heat exchanger can be functionally reused, and on the premise that the heat management and dehumidification functions of the energy storage equipment are achieved, the system is simplified, and the size is compact.

Description

Technical Field

[0001] The present application belongs to the field of thermal management technology, and in particular, relates to a thermal management system, energy storage equipment and energy storage power station. Background Art

[0002] During the operation of energy storage equipment, a thermal management system is introduced to ensure its safety and performance. The thermal management system of energy storage equipment uses a chiller and a liquid cooling heat exchanger to manage the heat of the battery cells. Condensation is prone to occur inside the battery compartment and needs to be dehumidified. Adding a dehumidification system to the thermal management system results in a larger volume of the entire thermal management system, which affects the volume ratio of the energy storage equipment. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes a thermal management system, an energy storage device and an energy storage power station, which can dehumidify the energy storage device and the volume of the entire system is compact.

[0004] In a first aspect, the present application provides a thermal management system, comprising:

[0005] A heat exchange circulation loop includes a compressor, a first circuit of a condenser, a control valve, a first expansion valve and a first circuit of an evaporator connected in sequence end to end;

[0006] Air duct;

[0007] a heat exchanger, installed in the air duct and connected in parallel with the control valve;

[0008] The second path of the evaporator is used to connect to the liquid cooling system of the load, and the air duct can be selectively connected to the outside or the accommodating chamber of the load.

[0009] According to the thermal management system of the embodiment of the present application, the heat exchanger is switched to a series or parallel state by adjusting the opening and closing of the control valve of the heat exchange circulation loop, and the air duct can be selectively connected to the outside or the load accommodation cavity, so that the heat exchanger connected in parallel with the control valve can perform the heat dissipation or dehumidification function of the battery. At the same time, since the heat exchanger and the control valve are connected in parallel and the heat exchanger is reused, the system layout is compact.

[0010] According to one embodiment of the present application, the thermal management system has a first operating mode and a second operating mode, wherein:

[0011] In the first working mode, the compressor is working, the air duct is connected to the outside, and the control valve is closed;

[0012] In the second working mode, the compressor is working, the air duct is connected to the accommodating chamber of the load, and the control valve is opened.

[0013] According to the thermal management system of the embodiment of the present application, different working modes are achieved by switching air ducts and opening and closing control valves.

[0014] According to an embodiment of the present application, a second expansion valve, the heat exchanger is connected in series with the second expansion valve and then connected in parallel with the control valve.

[0015] According to one embodiment of the present application, in the first working mode, the second expansion valve is fully opened and the first expansion valve is working;

[0016] In the second operation mode, the second expansion valve is in operation and the first expansion valve is in operation.

[0017] According to one embodiment of the present application, a damper is used to switch the connection state between the air duct and the outside or the accommodating chamber of the load.

[0018] According to one embodiment of the present application, a fan is installed in the air duct.

[0019] According to one embodiment of the present application, the condenser has a second path for connecting to a water tank.

[0020] According to one embodiment of the present application, the controller is electrically connected to the compressor, the control valve, and the first expansion valve.

[0021] In a second aspect, the present application provides an energy storage device, the energy storage device comprising:

[0022] Battery, with liquid cooling system;

[0023] In the thermal management system described in the above embodiment, the second path of the evaporator is connected to the liquid cooling system of the battery, and the air duct can be selectively connected to the outside or the accommodating cavity of the battery.

[0024] According to the energy storage device of the present application, the second path of the evaporator of the thermal management system is connected to the liquid cooling system of the battery to achieve cooling and dehumidification of the battery.

[0025] In a third aspect, the present application provides an energy storage power station, which includes:

[0026] The energy storage device as described in the above embodiment;

[0027] A green power generation system is electrically connected to the energy storage device.

[0028] The energy storage power station according to the present application is connected to an energy storage device including the thermal management system in the embodiment to achieve battery cooling and dehumidification during green power generation.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 It is one of the structural schematic diagrams of the thermal management system provided in the embodiment of the present application;

[0032] Figure 2 This is the second structural diagram of the thermal management system provided in the embodiment of the present application;

[0033] Figure 3 is one of the principle diagrams of the thermal management system provided by the embodiment of the present application in the first working mode;

[0034] Figure 4 This is the second schematic diagram of the thermal management system provided by the embodiment of the present application in the first working mode;

[0035] Figure 5 is one of the principle diagrams of the thermal management system provided by the embodiment of the present application in the second working mode;

[0036] Figure 6 This is the second schematic diagram of the thermal management system provided in the embodiment of the present application in the second working mode.

[0037] Reference numerals:

[0038] Thermal management system 100;

[0039] Heat exchange circulation loop 110, compressor 111, condenser 112, control valve 113, first expansion valve 114, evaporator 115;

[0040] Air duct 120;

[0041] Heat exchanger 130;

[0042] A second expansion valve 140;

[0043] Fan 150;

[0044] Damper 160. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0046] The following is a detailed description of the principle by which the thermal management system proposed in this application can achieve the above beneficial effects:

[0047] In the related technology, the liquid cooling thermal management system uses a chiller and a liquid cooling heat exchange device to cool or heat the battery cells. Condensation is prone to occur inside the battery compartment, and dehumidification is required from time to time. Some systems do not take dehumidification measures, which poses a hidden danger to the battery. The systems that have taken dehumidification measures have external dehumidification components, which increases the size of the system and is not compact enough.

[0048] In order to solve this technical problem, the present invention provides a thermal management system 100, as shown below. Figure 1-Figure 6 A thermal management system 100 according to an embodiment of the present application is described.

[0049] like Figure 1 As shown, the thermal management system 100 of the embodiment of the present application includes a heat exchange circulation loop 110 , an air duct 120 and a heat exchanger 130 .

[0050] In some embodiments, the heat exchange circulation loop 110 includes a compressor 111 , a condenser 112 , a control valve 113 , a first expansion valve 114 , and an evaporator 115 .

[0051] The compressor 111, the first path of the condenser 112, the control valve 113, the first expansion valve 114 and the first path of the evaporator 115 are connected in sequence end to end.

[0052] The compressor 111 is connected between the condenser 112 and the evaporator 115 and increases the pressure of the gas by reducing its volume, thereby providing power for the refrigeration cycle.

[0053] The compressor 111 in the thermal management system 100 can be a variable frequency compressor or a fixed frequency compressor.

[0054] When the thermal management system 100 operates according to a preset temperature range, the compressor 111 can use a fixed-frequency compressor, which has a lower cost; when the thermal management system 100 needs to adjust the operating frequency according to thermal management requirements, the compressor 111 can use a variable-frequency compressor, which can maintain high-efficiency operation under different load conditions while reducing energy consumption, thereby achieving energy saving and efficient temperature control.

[0055] The condenser 112 is connected between the compressor 111 and the control valve 113 , and is used to condense the thermal fluid in the thermal management system 100 into liquid.

[0056] like Figure 1 , Figure 3 and Figure 5As shown, the condenser 112 includes a first path and a second path. The first path of the condenser 112 is connected between the compressor 111 and the control valve 113, and the second path of the condenser 112 is connected to the coolant tank.

[0057] The output end of the compressor 111 in the heat exchange circulation loop 110 is connected to the input end of the first path of the condenser 112 , and the output end of the first path of the condenser 112 is connected to the input end of the control valve 113 .

[0058] The control valve 113 is connected between the condenser 112 and the first expansion valve 114 , and is used to control the on-off of the fluid in the heat exchange circulation loop 110 .

[0059] In some embodiments, Figure 1 , Figure 3 and Figure 5 As shown, the control valve 113 in the thermal management system 100 is an electronic on-off valve.

[0060] Electronic on-off valves can be selected from solenoid valves, electric valves, proportional valves and servo valves, etc.

[0061] The thermal management system 100 controls the opening or closing of the electronic on-off valve through a controller to achieve on-off control of the coolant.

[0062] The first expansion valve 114 is connected between the control valve 113 and the evaporator 115 .

[0063] In some embodiments, the first expansion valve 114 is an electronic expansion valve.

[0064] The electronic expansion valve comprises a rotor, a stator, a valve needle and a valve body.

[0065] The valve body is generally made of brass, and the valve needle is driven by the rotor. The end of the valve needle is tapered, and the valve needle moves up and down to adjust the flow.

[0066] The electronic expansion valve can monitor and adjust the pressure and superheat of the evaporator outlet in real time to achieve precise control of the refrigerant flow. The electronic expansion valve has excellent temperature sensing ability, high-precision control ability, and fast response speed.

[0067] The first expansion valve 114 may also be a thermal expansion valve, which has a built-in temperature sensing package to automatically control the opening and closing of the thermal expansion valve according to temperature changes and to control the refrigerant flow according to the superheat.

[0068] The evaporator 115 is connected between the first expansion valve 114 and the condenser 112 .

[0069] The evaporator 115 includes a first path and a second path, wherein the output end of the first expansion valve 114 is connected to the input end of the first path of the evaporator 115, the output end of the first path of the evaporator 115 is connected to the input end of the compressor 111, and the second path of the evaporator 115 is used to connect the liquid cooling system of the load.

[0070] In some embodiments, the load is a battery, and the second path of the evaporator 115 is used to connect to a liquid cooling system of the battery to absorb the heat of the battery coolant.

[0071] In some embodiments, the evaporator 115 may be in at least one of the following structural forms:

[0072] First, the evaporator 115 is a horizontal shell and tube evaporator.

[0073] The battery coolant, i.e., the coolant, flows in the tube, and the coolant of the thermal management system 100 evaporates outside the tube. The horizontal shell and tube evaporator has the characteristics of compact structure and high heat transfer coefficient.

[0074] Second, the evaporator 115 is a dry evaporator.

[0075] In a dry evaporator, the coolant of the thermal management system 100 flows and evaporates in the tube, while the battery coolant, i.e., the coolant, flows outside the tube. The dry evaporator has no effect of the liquid column on the evaporation temperature, and the required coolant filling amount is smaller.

[0076] The output end of the compressor 111 in the heat exchange circulation loop 110 is connected to the input end of the condenser 112, the output end of the condenser 112 is connected to the input end of the control valve 113, the output end of the control valve 113 is connected to the input end of the first expansion valve 114, the output end of the first expansion valve 114 is connected to the input end of the evaporator 115, and the output end of the evaporator 115 is connected to the input end of the compressor 111, which is used to drive the refrigerant and the heat exchanger 130 to exchange heat when performing thermal management on the energy storage device.

[0077] The connection and disconnection of the heat exchange circulation loop 110 are regulated by opening and closing the control valve 113. When the heat exchange circulation loop 110 is disconnected, the thermal management system 100 cools the energy storage device. When the heat exchange circulation loop 110 is connected, the thermal management system 100 cools and dehumidifies the energy storage device at the same time.

[0078] The air duct 120 can be made of metal, plastic or flexible material to meet different installation requirements and air flow characteristics. For example, the air duct 120 can be made of galvanized steel plate, and the galvanized layer can protect the steel plate from corrosion in a humid environment. The air duct 120 is composed of a series of galvanized steel plates, and a channel for air flow is formed between the galvanized steel plates.

[0079] The air duct 120 can selectively communicate with the outside or the receiving cavity of the load.

[0080] When the air duct 120 is connected to the outside, air is used as a cooling medium to exchange heat in the heat exchanger 130 with air; when the air duct 120 is connected to the load accommodating cavity, water attached to the inner wall of the accommodating cavity is vaporized by air flow.

[0081] In some embodiments, the load is a battery, the load accommodation cavity is a battery compartment, and the outside refers to the atmospheric environment. At this time, the air flow in the air duct is used to vaporize the water attached to the wall of the battery compartment.

[0082] It should be noted that the use of air flow can speed up the evaporation process of liquid water. Wind increases the flow rate of air, so that the air above the water surface is constantly renewed. This flow carries away water vapor on the water surface, reduces the pressure of water vapor, and thus promotes more liquid water molecules to be transformed into water vapor. When wind blows over the water surface, waves can be formed, which increases the surface area of ​​the water, exposes more water molecules to the air, and increases the evaporation rate. The wind carries away water vapor and reduces the humidity near the water surface, making it easier for water molecules to transform from liquid to gas. Wind can promote convection between the water surface and the surrounding air. This convection helps transfer heat from the water body to the air, providing the necessary energy for water evaporation.

[0083] The heat exchanger 130 is installed in the air duct 120 , and the heat exchanger 130 is connected in parallel with the control valve 113 .

[0084] In some embodiments, the heat exchanger 130 is mounted on the outer shell of the battery compartment, and the air duct 120 covers the heat exchanger 130. The coolant of the thermal management system 100 flows inside the heat exchanger 130, absorbs the heat generated by the battery, and then transfers the heat to the atmosphere through the air flow of the air duct 120.

[0085] In some embodiments, Figure 3 and Figure 5 As shown, the thermal management system 100 includes two operating modes: a first operating mode and a second operating mode.

[0086] The first working mode is used for cooling the energy storage device, and the second working mode is used for dehumidifying the energy storage device.

[0087] Among them, in the first working mode, the compressor 111 works, the air duct 120 is connected to the outside, and the control valve 113 is closed; in the second working mode, the compressor 111 works, the air duct 120 is connected to the battery compartment, and the control valve 113 is opened.

[0088] During thermal management, if it is found that the temperature of the battery compartment is high and needs to be cooled, the first working mode is switched. At this time, the output end of the compressor 111 is connected to the input end of the condenser 112, the output end of the first path of the condenser 112 is connected to the input end of the heat exchanger 130, the output end of the heat exchanger 130 is connected to the input end of the first expansion valve 114, the output end of the first expansion valve 114 is connected to the input end of the first path of the evaporator 115, and the output end of the first path of the evaporator 115 is connected to the input end of the compressor 111 to form a loop.

[0089] In the first working mode, the compressor 111 is working, the air duct 120 is connected to the atmospheric environment, the control valve 113 is closed, and the heat exchanger 130 transfers the heat of the battery compartment to the external atmospheric environment.

[0090] When performing thermal management, if it is found that the battery compartment needs to be dehumidified, the second working mode is switched, and the thermal management system 100 includes two circuits.

[0091] One loop is that the output end of the compressor 111 is connected to the input end of the first circuit of the condenser 112, the output end of the first circuit of the condenser 112 is connected to the input end of the control valve 113, the output end of the control valve 113 is connected to the input end of the first expansion valve 114, the output end of the first expansion valve 114 is connected to the input end of the first circuit of the evaporator 115, and the output end of the first circuit of the evaporator 115 is connected to the input end of the compressor 111.

[0092] Another circuit is that the output end of the compressor 111 is connected to the input end of the first circuit of the condenser 112, the output end of the first circuit of the condenser 112 is connected to the input end of the heat exchanger 130, the output end of the heat exchanger 130 is connected to the input end of the first expansion valve 114, the output end of the first expansion valve 114 is connected to the input end of the first circuit of the evaporator 115, and the output end of the first circuit of the evaporator 115 is connected to the input end of the compressor 111.

[0093] In the second working mode, the compressor 111 works, the air duct 120 is connected to the battery compartment, the control valve 113 is opened, the control valve 113 is connected in parallel with the heat exchanger 130, the condenser 112 and the evaporator 115 are directly connected, and the battery compartment is dehumidified while cooling.

[0094] According to the thermal management system 100 provided in the embodiment of the present application, the compressor 111 in the heat exchange circulation loop 110 compresses the coolant to increase the pressure and then inputs it into the condenser 112. In different working modes, the opening and closing of the control valve 113 and the air duct 120 are different. Through the cooperation of the control valve 113 and the heat exchanger 130, the energy storage device can be cooled or dehumidified. After the coolant enters the evaporator 115, it flows back into the compressor 111 to realize the circulation.

[0095] Among them, in the first working mode, the compressor 111 and the condenser 112 are working, the air duct 120 is connected to the outside, the control valve 113 is closed, and the condenser 112 and the heat exchanger 130 are connected in series; in the second working mode, the compressor 111 and the condenser 112 are working, the air duct 120 is connected to the battery compartment, the control valve 113 is opened, the heat exchanger 130 and the control valve 113 are connected in parallel and then in series with the condenser 112, and the thermal management system 100 controls the opening or closing of the control valve 113 through the controller to realize the on-off control of the coolant, thereby realizing the mode switching of the thermal management system 100.

[0096] By adjusting the opening and closing of the control valve 113 of the heat exchange circulation loop 110, the air duct 120 can be selectively connected to the atmospheric environment or the battery compartment, so that the thermal management system 100 is switched to the first working mode or the second working mode. In the first working mode, the thermal management system 100 cools the energy storage device, and in the second working mode, the thermal management system 100 cools and dehumidifies the energy storage device. At the same time, since the heat exchanger 130 and the control valve 113 are connected in parallel and the heat exchanger 130 is reused, the system layout is compact.

[0097] In some embodiments, Figure 1 , Figure 3 , Figure 5 As shown, the thermal management system 100 further includes a second expansion valve 140 .

[0098] The output end of the first circuit of the condenser 112 is connected to the input end of the second expansion valve 140 , and the output end of the second expansion valve 140 is connected to the input end of the heat exchanger 130 . The second expansion valve 140 is used to control the flow of the coolant entering the heat exchanger 130 .

[0099] In some embodiments, in the first working mode, the second expansion valve 140 is fully opened and the first expansion valve 114 is working.

[0100] The second expansion valve 140 is fully open and does not adjust the coolant flow passing therethrough, while the first expansion valve 114 works to adjust the coolant flow entering the evaporator 115 according to the needs of the energy storage device.

[0101] In some embodiments, the flow rate is regulated by a temperature sensing package, which is located at the outlet of the evaporator 115 and can sense the superheat of the coolant.

[0102] In the second operation mode, the second expansion valve 140 is in operation and the first expansion valve 114 is in operation.

[0103] The second expansion valve 140 and the first expansion valve 114 are both in operation, and the coolant flow rates of the second expansion valve 140 and the first expansion valve 114 entering the heat exchanger 130 and the evaporator 115 are adjusted according to the demand of the energy storage device.

[0104] In some embodiments, the second expansion valve 140 may have the same structure as the first expansion valve 114 .

[0105] like Figure 4 and Figure 6 As shown, the second expansion valve 140 and the heat exchanger 130 are connected in series and then connected in parallel with the electronic on-off valve, the input end of the electronic on-off valve is connected to the first output end of the condenser 112, and the output end of the electronic on-off valve is connected to the first input end of the evaporator 115. After the coolant flows out of the condenser 112, in the first working mode or the second working mode, by controlling the second expansion valve 140 to be fully opened or to control the opening, the coolant flows into the heat exchanger 130 without throttling or after throttling.

[0106] According to the thermal management system 100 provided in the embodiment of the present application, in the first working mode or the second working mode, the first expansion valve 114 and the second expansion valve 140 may perform the same or different opening degrees according to requirements.

[0107] When the energy storage device performs thermal management, in the first working mode, the second expansion valve 114 is fully opened, the first expansion valve 140 is working, the air duct 120 is connected to the atmospheric environment, the control valve 113 is closed, and the coolant enters the compressor 111 and the condenser 112 in sequence, and then enters the heat exchanger 130 only through the second expansion valve 114, and then flows into the evaporator 115 through the first expansion valve 140 to realize circulation. At this time, the energy storage device is cooled.

[0108] When the energy storage device performs thermal management, in the second working mode, the second expansion valve 114 and the first expansion valve 140 work, the air duct 120 is connected to the battery compartment, the control valve 113 is opened, and the coolant enters the compressor 111 and the condenser 112 in sequence. Then, a part of the coolant enters the heat exchanger 130 through the first expansion valve 140, and the other part of the coolant directly enters the control valve 113, and then the two parts of the coolant flow into the evaporator 115 to realize circulation. At this time, the energy storage device is cooled and dehumidified at the same time.

[0109] In some embodiments, Figure 2 , Figure 4 and Figure 6 As shown, the thermal management system 100 also includes a damper 160 .

[0110] The damper 160 is located at the opening of the air duct 120 , and is connected to the openings of different air ducts 120 to form different connected air ducts 120 .

[0111] The damper 160 is used to switch the connection state between the air duct 120 and the atmosphere or the battery compartment. Figure 4 and Figure 6 As shown, the openings of different pipelines are opened and closed by rotating the damper 160, so as to switch the connection between the air duct 120 and the atmosphere or the battery compartment.

[0112] According to the thermal management system 100 provided in the embodiment of the present application, the air door 160 is connected to different air ducts 120 by rotating, so that the heat exchanger 130 can switch the air duct 120 between the first working mode and the second working mode.

[0113] The damper 160 and the air duct 120 are installed on the battery compartment. The damper 160 is rotated to close different openings of the air duct 120 to form a cavity for air circulation, so that the wind can play different roles in different working modes.

[0114] In some embodiments, Figure 1-Figure 6 As shown, the thermal management system 100 also includes a fan 150 .

[0115] The fan 150 is installed at the center of the air duct 120 , and the fan 150 is used to control the air flow in the heat exchanger 130 .

[0116] The fan 150 can be made of materials such as engineering plastics, metal alloys, carbon fiber, silicone, and wood.

[0117] In some embodiments, the fan 150 may be replaced by a blower, a fan, etc. The fan 150 or a component with similar functions is used to achieve air flow in different air ducts 120 .

[0118] According to the thermal management system 100 provided in the embodiment of the present application, in a first working mode, the compressor 111 is working, the air duct 120 is connected to the external atmospheric environment, the control valve 113 is closed, and the fan 150 drives the heat exchanger 130 and the external air to circulate and exchange heat; in a second working mode, the compressor 111 is working, the air duct 120 is connected to the battery compartment, the control valve 113 is opened, and the fan 150 drives the air in the battery compartment to circulate for dehumidification.

[0119] The fan 150 drives the air in the air duct 120 to flow, thereby realizing the flow of air in the flow path in the first working mode and the second working mode, and cooling or dehumidifying the energy storage device.

[0120] In some embodiments, thermal management system 100 also includes a controller.

[0121] The controller is electrically connected to the compressor 111 , the control valve 113 , and the first expansion valve 114 , and is used to control the start-up of the compressor 111 , the opening and closing of the control valve 113 , and the opening degree of the first expansion valve 114 .

[0122] In some embodiments, the controller also controls the rotation of the fan 150 and the opening and closing of the damper 160 .

[0123] In the first working mode, the controller controls the compressor 111 to work, controls the damper 160 to connect the air duct 120 with the outside, controls the valve 113 to close, and controls the first expansion valve 114 to work, and controls the fan 150 to drive the heat exchanger 130 and the outside air to circulate and exchange heat.

[0124] In the second working mode, the controller controls the compressor 111 to work, controls the damper 160 to connect the air duct 120 with the battery compartment, controls the valve 113 to open, and controls the first expansion valve 114 and the second expansion valve 140 to work, and controls the fan 150 to drive the air circulation in the battery compartment for dehumidification.

[0125] The controller can automatically or remotely and contactlessly control and adjust the compressor 111, the control valve 113, and the first expansion valve 114 to meet the cooling or dehumidification requirements of the energy storage device at all times.

[0126] According to the thermal management system 100 provided in the embodiment of the present application, the operation of the compressor 111, the opening of the first expansion valve 114 and the opening and closing of the control valve 113 are controlled by the controller to realize the operation in the first working mode and the second working mode.

[0127] The thermal management system 100 mainly uses the switching of the damper 160 and the control valve 113 to enable the functional reuse of the heat exchanger 130. On the premise of achieving the thermal management effect of the battery compartment, the system is streamlined and more integrated to achieve system compactness; when realizing the cooling function, the second expansion valve 140 is fully opened, and the switching of the damper 160 connects the atmosphere and the thermal management system 100, and the thermal management system 100 releases heat to the external environment. At this time, the first expansion valve 114 controls the opening according to system requirements, and the control valve 113 controls the heat exchange circulation loop 110 to be completely closed; when realizing the dehumidification function, the control valve 113 controls the heat exchange circulation loop 110 to open, and the switching of the damper 160 connects the battery compartment with the thermal management system 100, and the heat exchanger 130 absorbs the heat of the battery compartment and dehumidifies the battery compartment at the same time.

[0128] It should be noted that the thermal management system 100 provided in the embodiment of the present application can be plugged into various types of liquid cooling management systems. As long as the air duct 120 and the damper 160 are adapted, the system can still maintain the cooling capacity when switching the dehumidification mode, thereby maintaining the stability of the system.

[0129] The embodiment of the present application also provides an energy storage device.

[0130] The energy storage device includes: a battery and a thermal management system 100 .

[0131] The battery has a liquid cooling system; the thermal management system 100 is the thermal management system 100 described in the above embodiment.

[0132] Batteries include lithium-ion batteries, nickel metal hydride batteries, lead-acid batteries, sodium-sulfur batteries, solid-state batteries, fuel cells and lithium polymer batteries.

[0133] The second path of the evaporator 115 of the thermal management system 100 is connected to the liquid cooling system of the battery, and the air duct 120 can be selectively connected to the outside or the battery accommodation cavity.

[0134] According to the energy storage device of the present application, the second path of the evaporator 115 of the thermal management system 100 is connected to the liquid cooling system of the battery to achieve cooling and dehumidification of the battery.

[0135] The embodiment of the present application also provides an energy storage power station.

[0136] The energy storage power station includes: energy storage equipment and green power generation system.

[0137] The energy storage device is the energy storage device described in the above embodiment, and the green power generation system is electrically connected to the energy storage device.

[0138] It should be noted that the green power generation system refers to the use of renewable energy to produce electricity, reduce dependence on fossil fuels, and reduce greenhouse gas emissions, thereby achieving an environmentally friendly power system.

[0139] According to the energy storage power station provided in the embodiment of the present application, the energy storage power station is connected to an energy storage device including the thermal management system 100 in the embodiment to achieve battery cooling and dehumidification during green power generation.

[0140] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0141] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0142] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0143] In the description of the present application, “plurality” means two or more.

[0144] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0145] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0146] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0147] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A thermal management system, characterized in that: include: A heat exchange circulation loop includes a compressor, a first circuit of a condenser, a control valve, a first expansion valve and a first circuit of an evaporator connected in sequence end to end; Air duct; a heat exchanger, installed in the air duct and connected in parallel with the control valve; The second path of the evaporator is used to connect to the liquid cooling system of the load, and the air duct can be selectively connected to the outside or the accommodating chamber of the load.

2. The thermal management system according to claim 1, characterized in that: The thermal management system has a first operating mode and a second operating mode, wherein: In the first working mode, the compressor is working, the air duct is connected to the outside, and the control valve is closed; In the second working mode, the compressor is working, the air duct is connected to the accommodating chamber of the load, and the control valve is opened.

3. The thermal management system according to claim 2, characterized in that: Also includes: A second expansion valve is connected in series with the heat exchanger and then connected in parallel with the control valve.

4. The thermal management system according to claim 3, characterized in that: In the first working mode, the second expansion valve is fully opened and the first expansion valve is working; In the second operation mode, the second expansion valve is in operation and the first expansion valve is in operation.

5. The thermal management system according to any one of claims 1 to 4, characterized in that: Also includes: The damper is used to switch the connection state between the air duct and the outside world or the accommodating chamber of the load.

6. The thermal management system according to any one of claims 1 to 4, characterized in that: Also includes: A fan is installed in the air duct.

7. The thermal management system according to any one of claims 1 to 4, characterized in that: The condenser has a second path for connecting to a water tank.

8. The thermal management system according to any one of claims 1 to 4, characterized in that: Also includes: The controller is electrically connected to the compressor, the control valve and the first expansion valve.

9. An energy storage device, characterized in that: include: Battery, with liquid cooling system; According to the thermal management system of any one of claims 1 to 8, the second path of the evaporator is connected to the liquid cooling system of the battery, and the air duct can be selectively connected to the outside or the accommodating cavity of the battery.

10. An energy storage power station, characterized in that: include: The energy storage device according to claim 9; A green power generation system is electrically connected to the energy storage device.

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