Energy storage heat management system and energy storage equipment

Abstract

The utility model discloses an energy storage thermal management system and energy storage equipment, the energy storage equipment comprises an energy storage cabinet internally provided with an energy storage battery, the thermal management system comprises a heat transfer part, a compressor, a heat exchange assembly, a throttle valve, an energy-saving heat exchanger and a heat regenerator, the heat transfer part and the energy-saving heat exchanger are arranged in the energy storage cabinet, and the compressor is arranged in the energy storage cabinet. The heat regenerator is provided with a first channel and a second channel; the compressor, the heat exchange assembly, the throttling valve, the heat transfer component, the energy-saving heat exchanger and the first channel are sequentially connected through pipelines to form a first circulation loop in which a refrigerant can circularly flow; the heat supply module is further provided with a parallel pipeline arranged on a pipeline between an outlet of the compressor and the heat exchange assembly in parallel, the second channel is arranged in the parallel pipeline, and the heat supply module is further provided with a control valve used for controlling opening and closing of the parallel pipeline. The energy-saving heat exchanger can drive air in the energy storage cabinet to exchange heat with the refrigerant.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of energy storage thermal management system and energy storage equipment. BACKGROUND

[0002] In prior art, energy storage battery is arranged in energy storage cabinet, and the temperature of energy storage battery is too low or too high, which will affect its normal work, and even cause the failure of energy storage equipment. Usually, a thermal management system is arranged to adjust the temperature of energy storage battery. However, after long time operation of energy storage equipment, the temperature of energy storage battery will rise, and the temperature in energy storage cabinet will also rise. Therefore, if only the temperature of energy storage battery is adjusted to reduce the temperature, the temperature in energy storage cabinet is still high, and the internal environment of energy storage cabinet will continuously affect energy storage battery, which not only may affect the adjustment effect of thermal management system, but also increase the working load of thermal management system. Some energy storage equipment will be separately provided with an adjustment system to adjust the temperature in energy storage cabinet. However, this increases the structural complexity and production cost of equipment, and also increases the energy consumption of equipment. SUMMARY

[0003] The utility model aims at providing a new energy storage thermal management system.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of an energy storage thermal management system. The energy storage equipment includes an energy storage cabinet and an energy storage battery arranged in the energy storage cabinet. The energy storage thermal management system includes a heat supply module and a heat transfer component for heat exchange with the energy storage battery. The heat supply module includes a compressor, a heat exchange assembly, an energy-saving heat exchanger and a regenerator. The heat transfer component and the energy-saving heat exchanger are arranged in the energy storage cabinet. The energy-saving heat exchanger includes a heat exchange main body and a heat exchange fan for driving the air in the energy storage cabinet to flow to the heat exchange main body. The regenerator has a first channel and a second channel which are independent of each other but can exchange heat. The compressor, the heat exchange assembly, the heat transfer component, the energy-saving heat exchanger and the first channel are sequentially connected by pipelines to form a first circulation loop in which refrigerant can circulate. The heat supply module is further provided with a parallel pipeline. The two ends of the parallel pipeline are connected to the pipeline between the compressor and the heat exchange assembly at intervals. The second channel is arranged in the parallel pipeline. The heat supply module is further provided with a control valve for controlling the opening and closing of the parallel pipeline.

[0005] In some embodiments, the thermal management system has a first mode and a second mode. In the first mode, the heat exchange fan is turned on, the parallel pipeline is closed, and the refrigerant flows in the first circulation loop. In the second mode, the heat exchange fan is turned off, the parallel pipeline is opened, and the refrigerant flows in the first circulation loop and the parallel pipeline.

[0006] In some embodiments, the outlet of the compressor is connected to the energy-saving heat exchanger through a pipeline, and the heat exchange assembly is connected to the first channel through a pipeline; the compressor, the energy-saving heat exchanger, the heat transfer component, the heat exchange assembly, and the first channel are sequentially connected through pipelines to form a second circulation loop.

[0007] In some embodiments, the parallel pipeline is arranged in parallel on the pipeline between the outlet of the compressor and the energy-saving heat exchanger, and the thermal management system has a third mode and a fourth mode; in the third mode, the heat exchange fan is turned on, the parallel pipeline is closed, and the refrigerant flows in the second circulation loop; in the fourth mode, the heat exchange fan is turned off, the parallel pipeline is opened, and the refrigerant flows in the second circulation loop and the parallel pipeline.

[0008] In some embodiments, the heat supply module is provided with a four-way valve, four interfaces of the four-way valve are a first interface, a second interface, a third interface, and a fourth interface, the first interface is connected to the outlet of the compressor through a pipeline, and the parallel pipeline is arranged in parallel on the pipeline between the first interface and the compressor; the second interface is connected to the heat exchange assembly through a pipeline, the third interface is connected to the first channel through a pipeline, and the fourth interface is connected to the energy-saving heat exchanger through a pipeline; in the first mode and the second mode, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; in the third mode and the fourth mode, the first interface is connected to the fourth interface, and the second interface is connected to the third interface.

[0009] In some embodiments, the heat exchange assembly includes a condenser and a heater, in the first mode and the second mode, the condenser is turned on and the heater is turned off; in the third mode and the fourth mode, the condenser is turned off and the heater is turned on.

[0010] In some embodiments, the control valve is a three-way valve capable of controlling the opening and closing of the pipeline and the opening degree of the pipeline, and the three-way valve is arranged at the connection between the parallel pipeline and the first circulation loop.

[0011] In some embodiments, the energy storage thermal management system includes a controller, the controller is signal-connected to the control valve, and the controller is configured to control the opening and closing and the opening degree of the control valve; the controller is signal-connected to the energy-saving heat exchanger, and the controller is configured to control the turning on and off of the heat exchange fan and the rotating speed of the heat exchange fan.

[0012] In some embodiments, the energy storage batteries are provided in multiple groups, the heat transfer components are provided in multiple groups in parallel, the heat transfer components include first ports and second ports, the first ports of the multiple groups of heat transfer components are connected together by a plurality of first manifold pipes, the second ports of the multiple groups of heat transfer components are connected together by a plurality of second manifold pipes, and liquid distributors for uniformly distributing refrigerant to the multiple groups of heat transfer components are arranged at intersections of the plurality of first manifold pipes and intersections of the plurality of second manifold pipes.

[0013] Another object of the present utility model is to provide an energy storage device.

[0014] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: an energy storage device comprising the energy storage thermal management system.

[0015] Due to the use of the above technical scheme, the energy storage device of the present utility model has the following advantages compared with the prior art: the energy storage thermal management system of the energy storage device of the present utility model comprises an energy-saving heat exchanger arranged in an energy storage cabinet, and the heat exchanger fan of the energy-saving heat exchanger can drive the air in the energy storage cabinet to flow and exchange heat with the refrigerant flowing through the energy-saving heat exchanger. When the energy storage thermal management system is used to cool the energy storage batteries, if the temperature in the energy storage cabinet is relatively high, the heat exchanger fan can be turned on to exchange heat between the refrigerant discharged from the heat transfer components and the internal environment of the energy storage cabinet, which not only heats the refrigerant discharged from the heat transfer components to completely convert it into a gaseous state, but also reduces the internal temperature of the energy storage cabinet, fully utilizes the energy in the energy storage cabinet, and achieves the effect of saving energy consumption. If the temperature in the energy storage cabinet is lower than the preset value, the parallel pipeline can be opened, and the heat exchanger is used to heat the refrigerant flowing back to the compressor to completely convert it into a gaseous state. BRIEF DESCRIPTION OF DRAWINGS

[0016] ATTACHMENT Figure 1 The energy storage device of the embodiment of the present utility model;

[0017] ATTACHMENT Figure 2 The schematic diagram of the energy storage thermal management system of embodiment 1 of the present utility model;

[0018] ATTACHMENT Figure 3 The principle schematic diagram of the energy storage thermal management system of embodiment 1 in the first mode;

[0019] ATTACHMENT Figure 4 The principle schematic diagram of the energy storage thermal management system of embodiment 1 in the second mode;

[0020] ATTACHMENT Figure 5 The principle schematic diagram of the energy storage thermal management system of embodiment 1 in the third mode;

[0021] ATTACHMENT Figure 6This is a schematic diagram of the energy storage thermal management system in the fourth mode of Example 1;

[0022] Appendix Figure 7 This is a schematic diagram of the energy storage thermal management system of Embodiment 2 of this utility model;

[0023] The components are as follows: 100, Energy Storage Cabinet; 110, High Voltage Module; 120, Energy Storage Converter; 200, Energy Storage Battery; 300, Heat Supply Module; 310, Compressor; 320, Heat Exchange Components; 321, Condenser; 322, Heater; 330, Throttling Valve; 340, Energy-Saving Heat Exchanger; 341, Heat Exchange Fan; 350, Regenerator; 351, First Channel; 352, Second Channel; 360, Parallel Piping; 370, Liquid Storage Tank; 380, Gas-Liquid Separator; 400, Heat Transfer Components; 410, First Port; 420, Second Port; 510, Four-Way Valve; 520, Three-Way Valve; 600, Liquid Distributor. Detailed Implementation

[0024] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the advantages and features of this utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0025] Example 1

[0026] See appendix Figure 1 The energy storage device shown includes an energy storage cabinet 100, an energy storage battery 200 disposed within the cabinet 100, a high-voltage module 110 that generates heat during operation, and an energy storage converter 120. The energy storage device also includes an energy storage thermal management system for monitoring and regulating the temperature of the energy storage device to prevent it from becoming too cold or too hot, thus ensuring stable and efficient operation. See also Figure 2The energy storage thermal management system shown includes a heat supply module 300 and a heat transfer component 400 for heat exchange with the energy storage battery 200, wherein the heat supply module 300 includes a compressor 310, a heat exchange assembly 320, a throttling valve 330, an energy-saving heat exchanger 340 and a regenerator 350, and the heat transfer component 400 is arranged in the energy storage cabinet 100 together with the energy-saving heat exchanger 340. The energy-saving heat exchanger 340 includes a heat exchange main body and an air heat exchanger fan 341 for driving the air in the energy storage cabinet 100 to flow to the heat exchange main body. When the air heat exchanger fan 341 is turned on, it can drive the air in the energy storage cabinet 100 to flow and exchange heat with the refrigerant flowing through the heat exchange main body of the energy-saving heat exchanger 340. The regenerator 350 has a first channel 351 and a second channel 352 which are independent of each other but can exchange heat. When the refrigerant flows in both the first channel 351 and the second channel 352, the refrigerant in the two channels can exchange heat. When only the first channel 351 or only the second channel 352 has refrigerant flowing in, the refrigerant flowing through the regenerator 350 will not exchange heat.

[0027] The heat transfer component 400 has a first port 410 and a second port 420. The outlet of the compressor 310 is connected to the heat exchange assembly 320 through a pipeline, the heat exchange assembly 320 is connected to the throttling valve 330 through a pipeline, the throttling valve 330 is connected to the first port 410 through a pipeline, the second port 420 is connected to the energy-saving heat exchanger 340 through a pipeline, the energy-saving heat exchanger 340 is connected to the first channel 351 through a pipeline, and the first channel 351 is connected to the inlet of the compressor 310 through a pipeline. The compressor 310, the heat exchange assembly 320, the throttling valve 330, the heat transfer component 400, the heat exchange main body of the energy-saving heat exchanger 340 and the first channel 351 are connected in sequence through pipelines to form a first circulation loop in which the refrigerant can circulate. The heat supply module 300 is also provided with a parallel pipeline 360, and the two ends of the parallel pipeline 360 are connected to the pipeline between the outlet of the compressor 310 and the heat exchange assembly 320. The second channel 352 is arranged in the parallel pipeline 360. The heat supply module 300 is also provided with a control valve for controlling the opening and closing of the parallel pipeline.

[0028] When the refrigerant flows in the first circulation loop, the compressor 310 discharges high-temperature and high-pressure gaseous refrigerant. The refrigerant flows to the heat exchange assembly 320 for cooling treatment and is converted into high-pressure and low-temperature liquid state. The refrigerant continues to flow forward through the throttling valve 330 and is converted into low-pressure and low-temperature gas-liquid mixture. The gas-liquid two-phase refrigerant enters the heat transfer component 400 and exchanges heat with the energy storage battery 200, thereby cooling the energy storage battery 200. The refrigerant discharged from the second port 420 of the heat transfer component 400 flows in sequence through the energy-saving heat exchanger 340 and the regenerator 350. In this process, the refrigerant absorbs heat and is completely converted into gaseous state. After that, the gaseous refrigerant returns to the compressor 310.

[0029] The thermal management system has a first mode and a second mode. When the temperature in the energy storage cabinet 100 is higher than a first preset value, the first mode is started. As shown in FIG. 4, in this mode, the refrigerant flows in the first circulation loop, the heat exchanger fan 341 is started, and the parallel pipeline 360 is closed. In the first mode, the regenerator 350 does not work, and the energy-saving heat exchanger 340 can heat the refrigerant flowing out of the heat transfer component 400 using the heat in the energy storage cabinet 100, so that the refrigerant is completely converted into a gaseous state. On the one hand, the environmental heat in the energy storage cabinet 100 can be fully utilized. On the other hand, through heat exchange at the energy-saving heat exchanger 340, the temperature in the energy storage cabinet 100 can be reduced, so that the energy storage device can work better. When the temperature in the energy storage cabinet 100 is lower than the first preset value, the second mode is started. As shown in FIG. 5, in this mode, the heat exchanger fan 341 is closed, and the parallel pipeline 360 is opened. The refrigerant flows in the first circulation loop and the parallel pipeline 360. In the second mode, the energy-saving heat exchanger 340 does not work. Part of the refrigerant discharged from the outlet of the self-compressor 310 flows into the parallel pipeline 360 and flows through the second channel 352. The refrigerant discharged from the heat transfer component 400 exchanges heat with the refrigerant in the second channel 352 after flowing into the first channel 351. On the one hand, the temperature of the refrigerant entering the compressor 310 is increased, so that the refrigerant is completely converted into a gaseous state. On the other hand, the temperature of the refrigerant entering the heat exchange assembly 320 is reduced, so that the working load of the heat exchange assembly 320 is reduced, and the energy efficiency of the energy storage thermal management system is improved. Figure 3 Figure 4

[0030] In this embodiment, the outlet of the compressor 310 is connected to the energy-saving heat exchanger 340 through a pipeline, the heat exchange assembly 320 is connected to the first channel 351 through a pipeline, and the compressor 310, the energy-saving heat exchanger 340, the heat transfer component 400, the heat exchange assembly 320, and the first channel 351 are sequentially connected through pipelines to form a second circulation loop. When the refrigerant flows in the second circulation loop, the compressor 310 discharges high-temperature and high-pressure gaseous refrigerant. The refrigerant is cooled before flowing into the heat transfer component 400. The cooled refrigerant flows into the heat transfer component 400 from the second port 420 and flows out from the first port 410. The refrigerant in the heat transfer component 400 can heat the energy storage battery 200. The refrigerant discharged from the heat transfer component 400 flows through the heat exchange assembly 320 and the regenerator 350 in sequence. In this process, the refrigerant is heated and completely converted into a gaseous state. Then, the gaseous refrigerant returns to the compressor 310.

[0031] In this embodiment, the parallel pipeline 360 is arranged in parallel on the pipeline between the outlet of the compressor 310 and the energy-saving heat exchanger 340. The thermal management system has a third mode and a fourth mode. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is lower than a second preset temperature, the third mode is started. As shown in FIG. 6, in this mode, the heat exchanger fan 341 is started, and the parallel pipeline 360 is closed. In the third mode, the energy-saving heat exchanger 340 does not work. The refrigerant flows in the first circulation loop. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is higher than the second preset temperature, the fourth mode is started. As shown in FIG. 7, in this mode, the heat exchanger fan 341 is closed, and the parallel pipeline 360 is opened. In the fourth mode, the energy-saving heat exchanger 340 does not work. The refrigerant flows in the first circulation loop and the parallel pipeline 360. Figure 5 ​​In the third mode, the regenerator 350 does not work, and the high-temperature and high-pressure refrigerant discharged by the compressor 310 is subjected to heat exchange treatment at the energy-saving heat exchanger 340, so that the temperature of the refrigerant is lowered and the temperature of the environment in the energy storage cabinet 100 is raised. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is higher than the second preset temperature, the fourth mode is started, as shown in FIG. 4C. In this mode, the heat exchange fan 341 is turned off, and the parallel pipeline 360 is opened, and the refrigerant flows in the second circulation loop and the parallel pipeline 360. In the fourth mode, part of the refrigerant discharged by the compressor 310 flows into the second passage 352, and the refrigerant flowing into the second passage 352 exchanges heat with the refrigerant flowing back to the first passage 351, so as to lower the temperature of the refrigerant in the second passage 352 and raise the temperature of the refrigerant flowing back to the compressor 310 to completely convert into gas. Figure 6 In the third mode, the regenerator 350 does not work, and the high-temperature and high-pressure refrigerant discharged by the compressor 310 is subjected to heat exchange treatment at the energy-saving heat exchanger 340, so that the temperature of the refrigerant is lowered and the temperature of the environment in the energy storage cabinet 100 is raised. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is higher than the second preset temperature, the fourth mode is started, as shown in FIG. 4C. In this mode, the heat exchange fan 341 is turned off, and the parallel pipeline 360 is opened, and the refrigerant flows in the second circulation loop and the parallel pipeline 360. In the fourth mode, part of the refrigerant discharged by the compressor 310 flows into the second passage 352, and the refrigerant flowing into the second passage 352 exchanges heat with the refrigerant flowing back to the first passage 351, so as to lower the temperature of the refrigerant in the second passage 352 and raise the temperature of the refrigerant flowing back to the compressor 310 to completely convert into gas.

[0032] In the third mode, the regenerator 350 does not work, and the high-temperature and high-pressure refrigerant discharged by the compressor 310 is subjected to heat exchange treatment at the energy-saving heat exchanger 340, so that the temperature of the refrigerant is lowered and the temperature of the environment in the energy storage cabinet 100 is raised. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is higher than the second preset temperature, the fourth mode is started, as shown in FIG. 4C. In this mode, the heat exchange fan 341 is turned off, and the parallel pipeline 360 is opened, and the refrigerant flows in the second circulation loop and the parallel pipeline 360. In the fourth mode, part of the refrigerant discharged by the compressor 310 flows into the second passage 352, and the refrigerant flowing into the second passage 352 exchanges heat with the refrigerant flowing back to the first passage 351, so as to lower the temperature of the refrigerant in the second passage 352 and raise the temperature of the refrigerant flowing back to the compressor 310 to completely convert into gas.

[0033] In the third mode, the regenerator 350 does not work, and the high-temperature and high-pressure refrigerant discharged by the compressor 310 is subjected to heat exchange treatment at the energy-saving heat exchanger 340, so that the temperature of the refrigerant is lowered and the temperature of the environment in the energy storage cabinet 100 is raised. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is higher than the second preset temperature, the fourth mode is started, as shown in FIG. 4C. In this mode, the heat exchange fan 341 is turned off, and the parallel pipeline 360 is opened, and the refrigerant flows in the second circulation loop and the parallel pipeline 360. In the fourth mode, part of the refrigerant discharged by the compressor 310 flows into the second passage 352, and the refrigerant flowing into the second passage 352 exchanges heat with the refrigerant flowing back to the first passage 351, so as to lower the temperature of the refrigerant in the second passage 352 and raise the temperature of the refrigerant flowing back to the compressor 310 to completely convert into gas. Figure 1 In the third mode, the regenerator 350 does not work, and the high-temperature and high-pressure refrigerant discharged by the compressor 310 is subjected to heat exchange treatment at the energy-saving heat exchanger 340, so that the temperature of the refrigerant is lowered and the temperature of the environment in the energy storage cabinet 100 is raised. When the temperature of the energy storage battery 200 is low and the temperature in the energy storage cabinet 100 is higher than the second preset temperature, the fourth mode is started, as shown in FIG. 4C. In this mode, the heat exchange fan 341 is turned off, and the parallel pipeline 360 is opened, and the refrigerant flows in the second circulation loop and the parallel pipeline 360. In the fourth mode, part of the refrigerant discharged by the compressor 310 flows into the second passage 352, and the refrigerant flowing into the second passage 352 exchanges heat with the refrigerant flowing back to the first passage 351, so as to lower the temperature of the refrigerant in the second passage 352 and raise the temperature of the refrigerant flowing back to the compressor 310 to completely convert into gas.

[0034] In the embodiment, the heat exchange assembly 320 includes a condenser 321 and a heater 322. In the first mode and the second mode, the condenser 321 is turned on and the heater 322 is turned off, and the condenser 321 is used to cool the refrigerant flowing into the heat transfer component 400. In the third mode and the fourth mode, the condenser 321 is turned off and the heater 322 is turned on, and the heater 322 is used to heat the refrigerant flowing back to the compressor 310.

[0035] In the embodiment, the heat supply module 300 further includes a liquid storage tank 370 and a gas-liquid separator 380. The liquid storage tank 370 is arranged on the pipeline between the heat exchange assembly 320 and the throttling valve 330, and the gas-liquid separator 380 is arranged on the pipeline between the first channel 351 and the inlet of the compressor 310.

[0036] In the embodiment, the heat management system further includes a defrosting mode. In the defrosting mode, the pipeline in communication is the same as that in the first mode and the second mode, and the condenser fan of the condenser 321 does not operate in the defrosting mode.

[0037] In the embodiment, the energy storage heat management system includes a controller. The controller is signal connected with the control valve and the four-way valve 510, can control the opening and closing of the four-way valve 510 and the three-way valve 520, and can control the opening degree of the three-way valve 520. The controller is further signal connected with the energy-saving heat exchanger 340, and is used to control the power and the rotating speed of the heat exchange fan 341. The controller is further signal connected with the compressor 310 and the throttling valve 330, and is used to control the flow rate of the refrigerant in the energy storage heat management system.

[0038] In the embodiment, a plurality of temperature sensors and pressure sensors are arranged in the energy storage heat management system. The temperature sensors and the pressure sensors are signal connected with the controller. The controller can adjust the opening and closing and the opening degree of the three-way valve 520, adjust the opening and closing and the power of the heat exchange fan 341, and adjust the power of the compressor 310 and the opening degree of the throttling valve 330 according to the obtained temperature and pressure data.

[0039] Specifically, the temperature sensor comprises a first temperature sensor arranged in the energy storage cabinet. When the energy storage battery 200 needs to be cooled, the controller obtains temperature data T1 measured by the first temperature sensor and compares the temperature data T1 with a first preset value Ta. When T1>Ta, the heat exchange fan 341 is turned on, the third valve port t of the three-way valve 520 is closed, and the first mode is started. When T1≤Ta, the heat exchange fan 341 is turned off, the third valve port t of the three-way valve 520 is opened, and the second mode is started. When the energy storage battery 200 needs to be heated, the controller obtains temperature data T1 measured by the first temperature sensor and compares the temperature data T1 with a second preset value Tb. When T1≤Tb, the heat exchange fan 341 is turned on, the third valve port t of the three-way valve 520 is closed, and the third mode is started. When T1>Tb, the heat exchange fan 341 is turned off, the third valve port t of the three-way valve 520 is opened, and the fourth mode is started. In the embodiment, the value range of Ta is 25℃ and above, and the value range of Tb is 15℃ and below.

[0040] In the embodiment, the temperature sensor further comprises a second temperature sensor arranged at the second port 420 of the heat transfer component 400 and a third temperature sensor arranged at the end of the energy-saving heat exchanger 340 away from the heat transfer component 400. In the first mode, the controller obtains temperature data T2 measured by the second temperature sensor and temperature data T3 measured by the third temperature sensor.

[0041] When T3-T2<Tc-db1, the rotation speed of the heat exchange fan 341 is increased;

[0042] When T3-T2>Tc+db1, the rotation speed of the heat exchange fan 341 is decreased;

[0043] When Tc-db1≤T3-T2≤Tc+db1, the rotation speed of the heat exchange fan 341 is maintained unchanged;

[0044] Tc is a predetermined temperature threshold, and db1 is an empirical parameter.

[0045] In the embodiment, the temperature sensor comprises a fourth temperature sensor arranged at the inlet of the compressor 310, and the pressure sensor comprises a first pressure sensor arranged at the inlet of the compressor 310. In the second mode, the controller obtains temperature data T4 measured by the fourth temperature sensor and pressure data P1 measured by the first pressure sensor, and obtains saturated temperature Tp1 under the pressure according to the pressure data P1.

[0046] When T4-Tp1>Td+db2, the third valve port t of the three-way valve 520 is closed;

[0047] When T4-Tp1<Td-db2, the third valve port t of the three-way valve 520 is opened;

[0048] When Td-db2≤T4-Tp1≤Td+db2, the third valve port t of the three-way valve 520 maintains unchanged;

[0049] The Tb is a predetermined temperature threshold, and the db2 is an empirical parameter.

[0050] In the first mode and the second mode,

[0051] When T2-Tp1>Tf+db3, the throttle valve 330 is opened;

[0052] When T2-Tp1Tf-db3, the throttle valve 330 is closed;

[0053] When Tf-db3≤T2-Tp1≤Tf+db3, the throttle valve 330 maintains unchanged;

[0054] The Tf is a predetermined temperature threshold, and the db3 is an empirical parameter.

[0055] In the third mode, the pressure sensor includes a second pressure sensor arranged at the outlet of the compressor 310, and the controller obtains pressure data P2 measured by the second pressure sensor, and obtains a saturation temperature Tp2 at the pressure according to the pressure data P2.

[0056] When T2-Tp2>Tf+db4, the rotation speed of the heat exchange fan 341 is increased;

[0057] When T2-Tp2Tf-db4, the rotation speed of the heat exchange fan 341 is decreased;

[0058] When Tf-db4≤T2-Tp2≤Tf+db4, the rotation speed of the heat exchange fan 341 maintains unchanged;

[0059] The Tf is a predetermined temperature threshold, and the db4 is an empirical parameter.

[0060] In the fourth mode,

[0061] When T2-Tp2>Tf+db4, the third valve port t of the three-way valve 520 is opened;

[0062] When T2-Tp2Tf-db4, the third valve port t of the three-way valve 520 is closed;

[0063] When Tf-db4≤T2-Tp2≤Tf+db4, the third valve port t of the three-way valve 520 maintains unchanged;

[0064] The Tf is a predetermined temperature threshold, and the db4 is an empirical parameter.

[0065] In the third mode and the fourth mode in this embodiment:

[0066] When T4-Tp1>Ti+db6, the throttle valve 330 is opened;

[0067] When T4-Tp1Ti-db3, the throttle valve 330 is closed;

[0068] When Ti-db3≤T4-Tp1≤Ti+db6, the throttle valve 330 is maintained unchanged;

[0069] Ti is a predetermined temperature threshold, and db6 is an empirical parameter.

[0070] In this embodiment, the heat transfer component 400 is a cold plate in contact with the energy storage battery. In this embodiment, the energy storage cabinet 100 is provided with a plurality of groups of energy storage batteries 200, and the heat transfer component 400 includes a plurality of groups arranged in parallel. The first ports 410 of the plurality of groups of heat transfer components 400 are connected together through a plurality of first manifold pipes, and the second ports 420 of the plurality of groups of heat transfer components 400 are connected together through a plurality of second manifold pipes. Liquid distributors 600 are arranged at the intersections of the plurality of first manifold pipes and the intersections of the plurality of second manifold pipes, and the liquid distributors 600 are used to uniformly distribute the refrigerant to the plurality of groups of heat transfer components 400.

[0071] Embodiment 2

[0072] Referring to Figure 7 The main difference between this embodiment and embodiment 1 is that the heat exchange assembly 320 of this embodiment is a component that can simultaneously cool and heat the refrigerant.

[0073] In summary, the energy storage device of all the above embodiments has an energy storage thermal management system, which comprises an energy-saving heat exchanger 340 arranged in the energy storage cabinet 100. The heat exchanger fan 341 of the energy-saving heat exchanger 340 can drive the air in the energy storage cabinet to flow and exchange heat with the refrigerant flowing through the energy-saving heat exchanger 340. When the energy storage battery 200 is cooled by the energy storage thermal management system, if the temperature in the energy storage cabinet 100 is high, the heat exchanger fan 341 can be started, and the energy-saving heat exchanger 340 can exchange heat between the refrigerant discharged from the heat transfer component 400 and the internal environment of the energy storage cabinet 100. Not only can the refrigerant discharged from the heat transfer component 400 be heated to completely convert into a gaseous state, but also the internal temperature of the energy storage cabinet 100 can be reduced, the energy in the energy storage cabinet 100 can be fully utilized, and energy consumption can be saved. If the temperature in the energy storage cabinet 100 is lower than the preset value, the heat exchanger fan 341 can be turned off, and the parallel pipeline 360 can be opened, and the regenerator 350 can heat the refrigerant flowing back to the compressor 310. When the energy storage battery 200 is heated by the energy storage thermal management system, if the temperature in the energy storage cabinet 100 is low, the heat exchanger fan 341 can also be started, and the energy-saving heat exchanger 340 can exchange heat between the refrigerant discharged from the compressor 310 and the internal environment of the energy storage cabinet 100. Not only can the temperature of the refrigerant discharged from the compressor 310 be reduced, but also the temperature in the energy storage cabinet 100 can be increased.

[0074] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An energy storage thermal management system, the energy storage device comprising an energy storage cabinet (100) and an energy storage battery (200) disposed within the energy storage cabinet (100), characterized in that: The energy storage thermal management system includes a heat supply module (300) and a heat transfer component (400) for exchanging heat with the energy storage battery (200). The heat supply module (300) includes a compressor (310), a heat exchange component (320), an energy-saving heat exchanger (340), and a regenerator (350). The heat transfer component (400) and the energy-saving heat exchanger (340) are disposed in the energy storage cabinet (100). The energy-saving heat exchanger (340) includes a heat exchange body and a heat exchange fan (341) for driving the air in the energy storage cabinet (100) to flow to the heat exchange body. The regenerator (350) has a first channel (351) and a second channel (352) that are independent of each other but capable of exchanging heat. The compressor (310), heat exchange assembly (320), heat transfer component (400), heat exchange body of energy-saving heat exchanger (340), and first channel (351) are sequentially connected by pipelines to form a first circulation loop in which refrigerant can circulate; the heat supply module (300) is also provided with a parallel pipeline (360), the two ends of the parallel pipeline (360) are connected at intervals to the pipeline between the compressor (310) and the heat exchange assembly (320), the second channel (352) is set in the parallel pipeline (360), and the heat supply module (300) is also provided with a control valve for controlling the opening and closing of the parallel pipeline (360).

2. The energy storage thermal management system according to claim 1, characterized in that, The thermal management system has a first mode and a second mode. In the first mode, the heat exchange fan (341) is turned on, the parallel pipeline (360) is turned off, and the refrigerant flows in the first circulation loop. In the second mode, the heat exchange fan (341) is turned off, the parallel pipeline (360) is turned on, and the refrigerant flows in the first circulation loop and the parallel pipeline (360).

3. The energy storage thermal management system according to claim 2, characterized in that, The outlet of the compressor (310) is connected to the energy-saving heat exchanger (340) through a pipeline, and the heat exchange component (320) is connected to the first channel (351) through a pipeline; the compressor (310), the energy-saving heat exchanger (340), the heat transfer component (400), the heat exchange component (320), and the first channel (351) are connected in sequence through pipelines to form a second circulation loop.

4. The energy storage thermal management system according to claim 3, characterized in that, The parallel pipeline (360) is connected in parallel between the outlet of the compressor (310) and the energy-saving heat exchanger (340). The thermal management system has a third mode and a fourth mode. In the third mode, the heat exchange fan (341) is turned on, the parallel pipeline (360) is turned off, and the refrigerant flows in the second circulation loop. In the fourth mode, the heat exchange fan (341) is turned off, the parallel pipeline (360) is turned on, and the refrigerant flows in the second circulation loop and the parallel pipeline (360).

5. The energy storage thermal management system according to claim 4, characterized in that, The heat supply module (300) is equipped with a four-way valve (510), the four ports of which are a first port, a second port, a third port and a fourth port. The first port is connected to the outlet of the compressor (310) through a pipeline. The parallel pipeline (360) is arranged in parallel between the first port and the compressor (310). The second port is connected to the heat exchange component (320) through a pipeline. The third port is connected to the first channel (351) through a pipeline. The fourth port is connected to the energy-saving heat exchanger (340) through a pipeline. In the first mode and the second mode, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; in the third mode and the fourth mode, the first interface is connected to the fourth interface, and the second interface is connected to the third interface.

6. The energy storage thermal management system according to claim 4, characterized in that, The heat exchange assembly (320) includes a condenser (321) and a heater (322). In the first mode and the second mode, the condenser (321) is turned on and the heater (322) is turned off. In the third mode and the fourth mode, the condenser (321) is turned off and the heater (322) is turned on.

7. The energy storage thermal management system according to claim 1, characterized in that, The control valve is a three-way valve (520) that can control the opening and closing of the pipeline and the pipeline opening degree. The three-way valve (520) is located at the connection between the parallel pipeline (360) and the first circulation loop.

8. The energy storage thermal management system according to claim 1, characterized in that, The energy storage thermal management system includes a controller that is signal-connected to the control valve and is configured to control the opening and closing and the opening degree of the control valve; the controller is signal-connected to the energy-saving heat exchanger (340) and is configured to control the opening and closing of the heat exchange fan (341) and the rotation speed of the heat exchange fan (341).

9. The energy storage thermal management system according to claim 1, characterized in that, The energy storage battery (200) is provided in multiple sets, and the heat transfer component (400) includes multiple sets arranged in parallel. The heat transfer component (400) has a first port (410) and a second port (420). The first ports (410) of the multiple sets of heat transfer components (400) are connected together through multiple first manifolds, and the second ports (420) of the multiple sets of heat transfer components (400) are connected together through multiple second manifolds. At the intersection of the multiple first manifolds and the intersection of the multiple second manifolds, a liquid distributor (600) is provided for uniformly distributing the refrigerant to the multiple sets of heat transfer components (400).

10. An energy storage device, characterized in that, Including the energy storage thermal management system as described in any one of claims 1 to 9.

Images