Energy storage temperature control system and control method thereof

Abstract

The invention relates to an energy storage temperature control system and a control method thereof.The energy storage temperature control system comprises a heat supply module and a heat transfer module, and the heat transfer module comprises a first heat transfer part exchanging heat with an energy storage battery and a second heat transfer part exchanging heat with an energy storage converter; the heat supply module comprises a gas compressor, a first heat exchanger, an electronic expansion valve and a power pump which are connected through a pipeline, and the energy storage temperature control system has a first mode and a second mode. The gas compressor, the first heat exchanger, the electronic expansion valve, the first heat transfer component and the second heat transfer component are sequentially communicated through pipelines to form a circulation loop. In the second mode, the power pump, the first heat transfer component, the second heat transfer component and the first heat exchanger are sequentially communicated through pipelines to form a circulation loop. The temperature control system can cool the energy storage battery and the energy storage converter at the same time, and the energy efficiency is high.

Description

Technical Field

[0001] The present invention relates to an energy storage temperature control system, and in particular to a temperature control system integrating a cooling system of an energy storage battery with a cooling system of an energy storage converter, and a control method of the energy storage temperature control system. Background Art

[0002] An energy storage system is a device or system that can store energy. It can store excess energy and use it when needed. Energy storage systems are usually used to improve energy efficiency, reduce energy waste, and improve grid stability. Energy storage systems can include devices or technologies such as batteries, supercapacitors, flywheels, and hydraulic systems, among which batteries are one of the most commonly used energy storage methods. Energy storage systems can be used in various application scenarios, such as grid peak regulation, renewable energy grid connection, electric vehicle charging, and home energy storage.

[0003] When the energy storage system is running, the battery will generate huge heat. If the heat cannot be discharged in time, the temperature of the device will rise, which will bring safety hazards and affect the performance of the battery and the normal operation of the system. At the same time, the battery pack needs to be properly stable to play the role of energy storage, so the battery pack needs to be heated when the ambient temperature is low. The energy storage converter (PCS) is also a key control device in the energy storage system. At the same time, the energy storage converter (PCS) is the heat generation device second only to the battery, so the temperature of the energy storage converter (PCS) also needs to be controlled to ensure the normal operation of the energy storage converter (PCS) and the system.

[0004] In the existing thermal management systems, the cooling systems adopt air cooling, liquid cooling and direct cooling. Most battery cooling systems are independent of the energy storage inverter cooling systems. Some cooling systems that adopt liquid cooling can integrate the two functions of battery cooling and energy storage inverter cooling. However, the cooling system that adopts liquid cooling needs secondary heat exchange during operation, and its thermal efficiency is low. At the same time, the cooling system that adopts liquid cooling needs to be equipped with a water pump to circulate the coolant, which increases power consumption. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a new energy storage temperature control system for the energy storage system, which can cool the energy storage battery and the energy storage inverter at the same time through a set of systems, and the temperature control system adopts a direct cooling method, which has higher energy efficiency than liquid cooling and air cooling, and can save energy consumption.

[0006] To achieve the above object, the technical solution adopted by the present invention is: an energy storage temperature control system, comprising a heat supply module and a heat transfer module, the heat transfer module comprising a first heat transfer component for exchanging heat with an energy storage battery, and a second heat transfer component for exchanging heat with an energy storage converter, the first heat transfer component and the second heat transfer component both having a first port, a second port and a fluid channel connecting the first port and the second port;

[0007] The heat supply module includes a gas compressor, a first heat exchanger, an electronic expansion valve and a power pump, wherein the outlet of the gas compressor is connected to the first heat exchanger through a pipeline, the first heat exchanger is connected to the electronic expansion valve through a pipeline, the electronic expansion valve is connected to the first port of the first heat transfer component through a pipeline, the second port of the first heat transfer component is connected to the first port of the second heat transfer component through a pipeline, and the second port of the second heat transfer component is connected to the inlet of the gas compressor through a pipeline; the first heat exchanger is connected to the inlet of the power pump through a pipeline, the outlet of the power pump is connected to the first port of the first heat transfer component through a pipeline, and the second port of the second heat transfer component is connected to the first heat exchanger through a pipeline;

[0008] The energy storage temperature control system has a first mode and a second mode. In the first mode, the gas compressor, the first heat exchanger, the electronic expansion valve, the fluid channel of the first heat transfer component, and the fluid channel of the second heat transfer component are connected in sequence through pipelines to form a circulation loop; in the second mode, the power pump, the fluid channel of the first heat transfer component, the fluid channel of the second heat transfer component, and the first heat exchanger are connected in sequence through pipelines to form a circulation loop;

[0009] The energy storage temperature control system also includes a controller and a valve assembly for controlling the opening and closing of a pipeline. The heat supply module is connected to and controlled by the controller. The valve assembly is electrically connected to and controlled by the controller.

[0010] In some embodiments, the heat supply module has a first parallel branch and a second parallel branch, the first parallel branch has a first end and a second end respectively arranged at two ends, the first end is connected to the pipeline between the electronic expansion valve and the first heat exchanger, the second end is connected to the pipeline between the electronic expansion valve and the first heat transfer component, and the power pump is arranged on the first parallel branch; the second parallel branch has a third end and a fourth end respectively arranged at two ends, the third end is connected to the pipeline between the second heat transfer component and the inlet of the gas compressor, and the fourth end is connected to the pipeline at the outlet of the gas compressor; the valve assembly includes a first solenoid valve arranged on the pipeline between the inlet of the gas compressor and the third end, or the first solenoid valve is arranged between the outlet of the gas compressor and the fourth end;

[0011] When the power pump is turned off, the electronic expansion valve is turned on, and the first solenoid valve is turned on, the first mode is turned on; when the power pump is turned on, the electronic expansion valve is turned off, and the first solenoid valve is turned off, the second mode is turned on.

[0012] In some embodiments, the electronic expansion valve is connected to the first port of the second heat transfer component through a pipeline, and the energy storage temperature control system has a third mode. In the third mode, the fluid channels of the gas compressor, the first heat exchanger, the electronic expansion valve, and the second heat transfer component are connected in sequence through pipelines to form a circulation loop.

[0013] In some embodiments, the outlet of the power pump is connected to the first port of the second heat transfer component through a pipeline, and the energy storage temperature control system has a fourth mode. In the fourth mode, the power pump, the fluid channel of the second heat transfer component, and the first heat exchanger are connected in sequence through pipelines to form a circulation loop.

[0014] In some embodiments, the second port of the first heat transfer component is connected to the inlet of the power pump through a pipeline, and the energy storage temperature control system has a fifth mode. In the fifth mode, the fluid channels of the power pump and the first heat transfer component are connected through the pipeline to form a circulation loop.

[0015] In some embodiments, the heat supply module has a second heat exchanger, the second port of the first heat transfer component is connected to the second heat exchanger through a pipeline, the second heat exchanger is connected to the inlet of the gas compressor through a pipeline, the heat supply module includes a third branch pipeline, the third branch pipeline has a first interface and a second interface respectively arranged at both ends, the first interface is connected to the pipeline between the gas compressor and the second heat exchanger, and the second interface is connected to the pipeline between the second heat exchanger and the second port of the first heat transfer component;

[0016] The energy storage temperature control system has a sixth mode. In the sixth mode, the gas compressor, the second heat exchanger / the third branch pipeline, the fluid channel in the first heat transfer component, the electronic expansion valve, and the first heat exchanger are connected through pipelines to form a circulation loop.

[0017] In some embodiments, the energy storage temperature control system has a third mode, the heat supply module has a first branch pipeline, the first branch pipeline has a first connecting end and a second connecting end respectively arranged at both ends, the first connecting end is connected to the pipeline between the electronic expansion valve and the first heat transfer component, and the second connecting end is connected to the pipeline between the first heat transfer component and the second heat transfer component; the valve assembly includes a second solenoid valve arranged on the first branch pipeline, and a third solenoid valve arranged on the pipeline between the first connecting end and the first heat transfer component, or the third solenoid valve is arranged on the pipeline between the second connecting end and the first heat transfer component;

[0018] When the second solenoid valve is closed and the third solenoid valve is opened, the first mode is turned on; when the second solenoid valve is opened and the third solenoid valve is closed, the third mode is turned on.

[0019] In some embodiments, the energy storage temperature control system has a fifth mode, the heat supply module includes a second branch pipeline, one end of the second branch pipeline is connected to the pipeline between the first heat exchanger and the power pump, and the other end of the second branch pipeline is connected to the pipeline between the first heat transfer component and the second heat transfer component; the valve assembly includes a fourth solenoid valve arranged on the second branch pipeline, and when the fourth solenoid valve is opened, the power pump is opened, and the electronic expansion valve is closed, the fifth mode is turned on.

[0020] In some embodiments, the energy storage temperature control system has a sixth mode, and the valve assembly includes a fifth solenoid valve disposed between the first interface and the second heat exchanger.

[0021] The second interface is connected to the second port of the second heat transfer component through a pipeline, the heat supply module includes a third parallel branch, the third parallel branch has a fifth end and a sixth end respectively arranged at two ends, the fifth end is connected to the pipeline between the second interface and the second heat transfer component, and the sixth end is connected to the pipeline between the first port of the second heat transfer component and the second port of the first heat transfer component;

[0022] When the energy storage temperature control system is in the first mode, the second mode, the third mode or the fourth mode, the fifth solenoid valve is closed and the third parallel branch is closed; in the sixth mode, the fifth solenoid valve can be opened and the third parallel branch is opened.

[0023] Another object of the present invention is to provide a control method for an energy storage temperature control system. To achieve the above object, the technical solution adopted by the present invention is: a control method for an energy storage temperature control system, based on the above energy storage temperature control system, when the temperature of the energy storage battery is higher than t1 and the ambient temperature of the energy storage system is higher than t2, the energy storage temperature control system turns on the first mode;

[0024] When the temperature of the energy storage battery is higher than t1 and the ambient temperature of the energy storage system is lower than t2, the energy storage temperature control system turns on the second mode;

[0025] Both t1 and t2 are predetermined temperature thresholds, wherein 30°C≤t1≤35°C, and 0°C≤t2≤5°C.

[0026] In some embodiments, the energy storage temperature control system has a third mode. When the temperature of the energy storage battery is higher than t3 but lower than t1, and the ambient temperature of the energy storage system is higher than t2, the energy storage temperature control system turns on the third mode; wherein t3 is a predetermined temperature threshold, 15°C≤t3≤30°C.

[0027] In some embodiments, the energy storage temperature control system has a fourth mode. When the temperature of the energy storage battery is higher than t3 but lower than t1, and the ambient temperature of the energy storage system is lower than t2, the energy storage temperature control system turns on the fourth mode.

[0028] In some embodiments, the energy storage temperature control system has a fifth mode. When the temperature difference of the energy storage battery is greater than δt, the energy storage temperature control system turns on the fifth mode, where δt is a predetermined temperature threshold, 3°C≤δt≤5°C.

[0029] In some embodiments, the energy storage temperature control system has a sixth mode. When the temperature of the energy storage battery is lower than t4, the energy storage temperature control system turns on the sixth mode; t4 is a predetermined temperature threshold, t4<t3, and 10℃≤t4≤15℃.

[0030] In some embodiments, when the energy storage temperature control system is in the first mode or the third mode, the pressure value P1 at the inlet of the gas compressor and the temperature value T1 at the second port of the second heat transfer component are obtained, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1.

[0031] When Tp1<T1, reducing the rotation speed of the gas compressor;

[0032] When Tp1>T1, increasing the speed of the gas compressor;

[0033] When the energy storage temperature control system is in the second mode or the fourth mode, the pressure value P1 at the inlet of the gas compressor and the temperature value T1 at the second port of the second heat transfer component are obtained, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1.

[0034] When Tp1<T1, reducing the delivery speed of the power pump;

[0035] When Tp1>T1, increasing the delivery speed of the power pump;

[0036] When the energy storage temperature control system is in the sixth mode, the pressure value P2 at the outlet of the gas compressor and the temperature T1' at the second port of the first heat transfer component are obtained, and the saturation temperature Tp2 corresponding to the refrigerant when the pressure value is P2 is compared with T1'.

[0037] When Tp2<T1', increasing the speed of the gas compressor;

[0038] When Tp2>T1', the rotation speed of the gas compressor is reduced.

[0039] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the present invention adopts a set of energy storage temperature control system to simultaneously exchange heat between energy storage batteries and energy storage inverters, and the temperature control system adopts direct cooling for cooling. Compared with air cooling and liquid cooling, direct cooling can save energy and improve efficiency. At the same time, the energy storage temperature control system has a first mode and a second mode. In the first mode, the gas compressor drives the refrigerant to flow in the circulation loop to achieve heat exchange between the energy storage battery and the energy storage inverter. When the outdoor temperature is low, the energy storage temperature control system can be converted to the second mode. In this mode, the power pump drives the refrigerant to flow in the loop, which saves more energy than the first mode. Compared with the prior art, the present invention can be used for thermal management of high energy density energy storage boxes. At the same time, it has advantages over existing temperature control systems in at least one aspect of cost, energy efficiency, stability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Attached Figure 1 It is a schematic diagram of an energy storage temperature control system in a first mode according to a specific embodiment of the present invention;

[0041] Attached Figure 2 is a schematic diagram of the energy storage temperature control system of this embodiment in the second mode;

[0042] Attached Figure 3 is a schematic diagram of the energy storage temperature control system of this embodiment in the third mode;

[0043] Attached Figure 4 is a schematic diagram of the energy storage temperature control system of this embodiment in the fourth mode;

[0044] Attached Figure 5 is a schematic diagram of the energy storage temperature control system of this embodiment in the fifth mode;

[0045] Attached Figure 6 is a schematic diagram of the energy storage temperature control system of this embodiment in the sixth mode;

[0046] Attached Figure 7 A schematic flow chart of a control method for an energy storage temperature control system according to a specific embodiment of the present invention;

[0047] Among them: 101, energy storage battery; 102, energy storage converter; 11, first heat transfer component; 12, second heat transfer component; 2, gas compressor; 3, gas-liquid separator; 41, first heat exchanger; 42, second heat exchanger; 5, fluid storage tank; 61, electronic expansion valve; 62, power pump; 711, first solenoid valve; 712, second solenoid valve; 713, third solenoid valve; 714, fourth solenoid valve; 715, fifth solenoid valve; 721, first one-way valve; 722, second one-way valve; 723, third one-way valve; 724, fourth one-way valve; 725, fifth one-way valve; 726, sixth one-way valve; 73, four-way reversing valve; 8, capillary; 91, first branch pipeline; 92, second branch pipeline; 93, third branch pipeline. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings, so that the advantages and features of the present invention 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 of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0049] See also Figure 1An energy storage temperature control system shown includes a heat supply module and a heat transfer module. The heat transfer module includes a first heat transfer component 11 for heat exchange with an energy storage battery 101 and a second heat transfer component 12 for heat exchange with an energy storage converter 102. Both the first heat transfer component 11 and the second heat transfer component 12 have a first port, a second port, and a fluid channel connecting the first port and the second port. In this embodiment, the fluid channel of the first heat transfer component 11 has such a shape that the pressure difference when the fluid flows from the first port through the fluid channel to the second port is less than a preset value, so that the pressure drop between the first port and the second port can be controlled. After the refrigerant is passed into the fluid channel of the first heat transfer component 11, the temperature difference between the first port and the second port of the refrigerant can be controlled, so that the temperature of the refrigerant in the fluid channel is uniform, and the heat exchange effect between the refrigerant and the energy storage battery 101 is better.

[0050] The heat supply module includes a gas compressor 2, a first heat exchanger 41, an electronic expansion valve 61 and a power pump 62. The outlet of the gas compressor 2 is connected to the first heat exchanger 41 through a pipeline, the first heat exchanger 41 is connected to the electronic expansion valve 61 through a pipeline, the electronic expansion valve 61 is connected to the first port of the first heat transfer component 11 through a pipeline, the second port of the first heat transfer component 11 is connected to the first port of the second heat transfer component 12 through a pipeline, and the second port of the second heat transfer component 12 is connected to the inlet of the gas compressor 2 through a pipeline. In this embodiment, the first heat exchanger 41 is connected to the inlet of the power pump 62 through a pipeline, the outlet of the power pump 62 is connected to the first port of the first heat transfer component 11 through a pipeline, and the second port of the second heat transfer component 12 is connected to the first heat exchanger 41 through a pipeline;

[0051] The energy storage temperature control system has a first mode and a second mode. In the first mode, the gas compressor 2, the first heat exchanger 41, the electronic expansion valve 61, the fluid channel of the first heat transfer component 11, and the fluid channel of the second heat transfer component 12 are connected in sequence through pipelines to form a circulation loop. In the second mode, the power pump 62, the fluid channel of the first heat transfer component 11, the fluid channel of the second heat transfer component 12, and the first heat exchanger 41 are connected in sequence through pipelines to form a circulation loop. When the temperature of the energy storage battery 101 and the energy storage inverter 102 is high and the ambient temperature is higher than the preset value, the energy storage temperature control system turns on the first mode. In this mode, driven by the gas compressor 2, the refrigerant flows in the circulation loop, and the heat supply module cools the energy storage battery 101 and the energy storage inverter 102 at the same time. When the temperature of the energy storage battery 101 and the energy storage inverter 102 is high and the ambient temperature is lower than the preset value, the energy storage temperature control system turns on the second mode. In this mode, driven by the power pump 62, the refrigerant flows in the circulation loop and cools the energy storage battery 101 and the energy storage inverter 102. In this embodiment, the power pump 62 is a fluorine pump. Compared with the use of the gas compressor 2 for circulation, the fluorine pump is more efficient; at the same time, the energy efficiency ratio of the fluorine pump is also higher, which can more effectively utilize electrical energy and reduce energy consumption. The fluorine pump can also provide more stable temperature control and has better adaptability.

[0052] In this embodiment, the heat supply module further includes a gas-liquid separator 3 and a fluid storage tank 5. The gas-liquid separator 3 is arranged on the pipeline at the inlet of the gas compressor 2, and the fluid storage tank 5 is arranged on the pipeline between the first heat exchanger 41 and the electronic expansion valve 61. The fluid storage tank 5 is also located on the pipeline between the first heat exchanger 41 and the power pump 62. In the first mode, the gas compressor 2, the first heat exchanger 41, the fluid storage tank 5, the electronic expansion valve 61, the fluid channel of the first heat transfer component 11, the fluid channel of the second heat transfer component 12, and the gas-liquid separator 3 are connected in sequence through the pipeline to form a circulation loop. In the second mode, the power pump 62, the fluid channel of the first heat transfer component 11, the fluid channel of the second heat transfer component 12, the gas-liquid separator 3, the first heat exchanger 41, and the fluid storage tank 5 are connected in sequence through the pipeline to form a circulation loop.

[0053] The refrigerant in this embodiment can be selected from one of R134a, R1234yf, R410A, R513A, R513B, and R454B.

[0054] In this embodiment, in the first mode, the gas compressor 2 discharges refrigerant in a high-temperature and high-pressure gas state, the first heat exchanger 41 will cool the refrigerant flowing through, and the refrigerant will be converted into a gas-liquid two-phase state after continuing to flow forward through the electronic expansion valve 62. The gas-liquid two-phase refrigerant flows into the fluid channel of the first heat transfer component 11 and exchanges heat with the energy storage battery 101. The refrigerant flowing out of the second port of the first heat transfer component 11 is still in a gas-liquid two-phase state. After the refrigerant enters the second heat transfer component 12 from the first port of the second heat transfer component 12 and exchanges heat with the energy storage inverter, the refrigerant flowing out of the second port of the second heat transfer component 12 is converted into a gas state, and the gas state refrigerant flows through the gas-liquid separator 3 and then flows back to the gas compressor 2.

[0055] In this embodiment, the energy storage battery 101 is provided with multiple groups, and each group of energy storage batteries 101 is respectively provided with a first heat transfer component 11, and the first ports of the multiple first heat transfer components 11 are connected to each other, and the second ports of the multiple first heat transfer components 11 are connected to each other, so that the multiple first heat transfer components 11 are arranged in parallel with each other. In some preferred embodiments, a liquid distributor is provided at the interface of the first ports of the multiple first heat transfer components 11 and the interface of the second ports of the multiple first heat transfer components 11, which is used to evenly distribute the refrigerant to each first heat transfer component 11. In other embodiments, a liquid distributor is provided on each of the multiple parallel pipelines formed between the multiple first heat transfer components 11 to control the flow rate of the refrigerant, thereby ensuring the even distribution of the refrigerant.

[0056] In this embodiment, the energy storage temperature control system also includes a controller and a valve assembly for controlling the opening and closing of the pipeline. The heat supply module is connected to and controlled by the controller. The valve assembly is electrically connected to and controlled by the controller. The controller realizes the switching of the energy storage temperature control system between different modes by controlling the valve assembly.

[0057] In this embodiment, the heat supply module has a first parallel branch and a second parallel branch, the first parallel branch has a first end and a second end respectively arranged at two ends, the first end is connected to the pipeline between the electronic expansion valve 61 and the first heat exchanger 41, the second end is connected to the pipeline between the electronic expansion valve 61 and the first heat transfer component 11, the power pump 62 is arranged on the first parallel branch, and the fluid storage tank 5 is arranged on the pipeline between the first heat exchanger 41 and the first end. The second parallel branch has a third end and a fourth end respectively arranged at two ends, the third end is connected to the pipeline between the second heat transfer component 12 and the inlet of the gas compressor 2, the fourth end is connected to the pipeline at the outlet of the gas compressor 2, and the gas-liquid separator 3 is arranged on the pipeline between the third end and the second heat transfer component 12. The valve assembly includes a first solenoid valve 711 arranged on the pipeline between the inlet of the gas compressor 2 and the third end, or the first solenoid valve 711 is arranged between the outlet of the gas compressor 2 and the fourth end. When the power pump 62 is turned off, the electronic expansion valve 61 is turned on, and the first solenoid valve 711 is turned on, the first mode is turned on; when the power pump 62 is turned on, the electronic expansion valve 61 is turned off, and the first solenoid valve 711 is turned off, the second mode is turned on.

[0058] In this embodiment, a first one-way valve 721 is provided between the outlet of the power pump 62 and the second end, and only allows the refrigerant to flow from the power pump 62 to the second end in one direction. A second one-way valve 722 is provided on the second parallel pipeline, and only allows the refrigerant to flow from the third end to the fourth end in one direction. The first one-way valve 721 and the second one-way valve 722 are used to prevent the refrigerant from flowing back. In this embodiment, a third one-way valve 723 is provided between the outlet of the gas compressor 2 and the fourth end, and only allows the refrigerant to flow from the gas compressor 2 to the fourth end in one direction, and is also used to prevent the refrigerant from flowing back.

[0059] In this embodiment, the electronic expansion valve 61 is connected to the first port of the second heat transfer component 12 through a pipeline, and the energy storage temperature control system has a third mode. In the third mode, the gas compressor 2, the first heat exchanger 41, the electronic expansion valve 61, and the fluid channel of the second heat transfer component 12 are connected through the pipeline in sequence to form a circulation loop. Specifically, in the third mode, the gas compressor 2, the first heat exchanger 41, the fluid storage tank 5, the electronic expansion valve 61, the fluid channel of the second heat transfer component 12, and the gas-liquid separator 3 are connected through the pipeline in sequence to form a circulation loop. When there is no need to cool the energy storage battery 101, the third mode is turned on, and the energy storage converter can be cooled down separately in this mode. In the circulation loop of the third mode, the gas compressor 2 discharges refrigerant in a high-temperature and high-pressure gas state, the first heat exchanger 41 cools the refrigerant flowing through it, and the refrigerant continues to flow forward through the electronic expansion valve 62, and then the refrigerant enters the second heat transfer component 12 from the first port of the second heat transfer component 12 and exchanges heat with the energy storage inverter 102, so that the energy storage inverter 102 is cooled, and the refrigerant flowing out from the second port of the second heat transfer component 12 is converted into a gas state, and the gas state refrigerant flows through the gas-liquid separator 3 and then flows back to the gas compressor 2.

[0060] In this embodiment, the heat supply module has a first branch pipeline 91, and the first branch pipeline 91 has a first connection end and a second connection end respectively arranged at two ends, the first connection end is connected to the pipeline between the electronic expansion valve 61 and the first heat transfer component 11, and the second connection end is connected to the pipeline between the first heat transfer component 11 and the second heat transfer component 12. The valve assembly includes a second solenoid valve 712 arranged on the first branch pipeline 91, and a third solenoid valve 713 arranged on the pipeline between the first connection end and the first heat transfer component 11, or the third solenoid valve 713 is arranged on the pipeline between the second connection end and the first heat transfer component 11. When the second solenoid valve 712 is closed, the third solenoid valve 713 is opened, and the first mode is opened; when the second solenoid valve 712 is opened, the third solenoid valve 713 is closed, and the third mode is opened.

[0061] In this embodiment, the outlet of the power pump 62 is connected to the first port of the second heat transfer component 12 through a pipeline, and the energy storage temperature control system has a fourth mode. In the fourth mode, the power pump 62, the fluid channel of the second heat transfer component 12, and the first heat exchanger 41 are connected in sequence through the pipeline to form a circulation loop. When the external ambient temperature is low and the energy storage battery 101 does not need to be cooled, the refrigerant can be driven by the power pump 62 to cool the energy storage inverter 102. Specifically, in this embodiment, the third solenoid valve 713 is set on the pipeline between the second end of the first parallel pipeline and the first interface, or the third solenoid valve 713 is set on the pipeline between the second connection end and the second port of the first heat transfer component 11. When the power pump 62 is turned on, the electronic expansion valve 61 is closed, the first solenoid valve 711 is closed, the second solenoid valve 712 is opened, and the third solenoid valve 713 is closed, the fourth mode is turned on.

[0062] In this embodiment, the second port of the first heat transfer component 11 is connected to the inlet of the power pump 62 through a pipeline, and the energy storage temperature control system has a fifth mode. In the fifth mode, the power pump 62 and the fluid channel of the first heat transfer component 11 are connected through the pipeline to form a circulation loop. Specifically, in this mode, the power pump 62, the fluid channel of the first heat transfer component 11, and the fluid storage tank 5 are connected through the pipeline to form a circulation loop. When there is a temperature difference between the multiple energy storage batteries 101, that is, the temperatures of the multiple energy storage batteries 101 are inconsistent, the fifth mode is turned on, and the refrigerant is driven to circulate in the circulation loop by the power pump 62, so that the temperatures of the multiple energy storage batteries 101 can be balanced.

[0063] In this embodiment, the heat supply module includes a second branch pipeline 92, one end of the second branch pipeline 92 is connected to the pipeline between the first heat exchanger 41 and the power pump 62, and the other end of the second branch pipeline 92 is connected to the pipeline between the first heat transfer component 11 and the second heat transfer component 12. The valve assembly includes a fourth solenoid valve 714 disposed on the second branch pipeline 92. When the fourth solenoid valve 714 is turned on, the power pump 62 is turned on, and the electronic expansion valve is turned off, the fifth mode is turned on.

[0064] In this embodiment, the heat supply module has a second heat exchanger 42, the second port of the first heat transfer component 11 is connected to the second heat exchanger 42 through a pipeline, the second heat exchanger 42 is connected to the inlet of the gas compressor 2 through a pipeline, and the heat supply module includes a third branch pipeline 93, the third branch pipeline 93 has a first interface and a second interface respectively arranged at both ends, the first interface is connected to the pipeline between the gas compressor 2 and the second heat exchanger 42, and the second interface is connected to the pipeline between the second heat exchanger 42 and the second port of the first heat transfer component 11. The energy storage temperature control system has a sixth mode, in which the gas compressor 2, the second heat exchanger 42 / the third branch pipeline 93, the fluid channel in the first heat transfer component 11, the electronic expansion valve 61, and the first heat exchanger 41 are connected through pipelines to form a circulation loop. Specifically, in the sixth mode, the gas compressor 2, the second heat exchanger 42 / the third branch pipeline 93, the fluid channel in the first heat transfer component 11, the electronic expansion valve 61, the fluid storage tank 5, the first heat exchanger 41, and the gas-liquid separator 3 are connected through pipelines to form a circulation loop. In this mode, the energy storage battery 101 can be heated by the refrigerant, so that the energy storage battery 101 can work normally.

[0065] In this embodiment, the valve assembly includes a fifth solenoid valve 715 disposed between the first interface and the second heat exchanger 42. When the energy storage temperature control system is in the first mode, the second mode, the third mode and the fourth mode, the fifth solenoid valve 715 is closed; in the sixth mode, the fifth solenoid valve 715 can be opened. Specifically, in the sixth mode, the gas compressor 2 discharges high-temperature and high-pressure gaseous refrigerant, and the fifth solenoid valve 715 can be opened, so that a part of the refrigerant discharged from the gas compressor 2 can flow directly to the second interface through the third branch pipeline 93, and another part of the refrigerant discharged from the gas compressor 2 can flow through the second heat exchanger 42 for heat exchange treatment, thereby converting from gas to liquid, and then flowing to the second interface. At the second interface, the two parts of the refrigerant merge together and form a gas-liquid two-phase state. The gas-liquid two-phase refrigerant flows into the first heat transfer component 11 from the second port of the first heat transfer component 11 and exchanges heat with the energy storage battery 101 to increase the temperature of the energy storage battery 101. After the refrigerant flows out from the first port of the first heat transfer component 11, it flows through the first heat exchanger 41 for heat exchange treatment and is converted into a gas state. The gaseous refrigerant flows through the gas-liquid separator 3 and then flows to the gas compressor 2.

[0066] When the energy storage system is working, it is usually not necessary to heat the energy storage converter. In this embodiment, the second interface is connected to the second port of the second heat transfer component 12 through a pipeline, and a fourth one-way valve 724 is provided on the pipeline between the second interface and the second port of the second heat transfer component 12, and the fourth one-way valve 724 is configured to only allow the refrigerant to flow from the second port of the second heat transfer component 12 to the third branch pipeline 93 in one direction. In the first mode, the second mode, the third mode and the fourth mode, the refrigerant after heat exchange cooling of the second heat transfer component 12 can pass through the fourth one-way valve 724 and flow from the third branch pipeline 93 to the gas-liquid separator 3. In the sixth mode, the refrigerant is blocked by the fourth one-way valve 724 and cannot flow to the second heat transfer component 12.

[0067] In this embodiment, the heat supply module includes a third parallel branch, and the third parallel branch has a fifth end and a sixth end respectively arranged at both ends, the fifth end is connected to the pipeline between the second interface and the second heat transfer component 12, and the sixth end is connected to the pipeline between the first port of the second heat transfer component 12 and the second port of the first heat transfer component 11. When the energy storage temperature control system is in the first mode, the second mode, the third mode and the fourth mode, the third parallel branch is closed; in the sixth mode, the third parallel branch is opened. Specifically, a fifth one-way valve 725 is provided on the third parallel pipeline, and the fifth one-way valve 725 is configured to only allow the refrigerant to flow in one direction from the fifth end to the sixth end. In the sixth mode, the outlet of the gas compressor 2, the second heat exchanger 42 / the third branch pipeline 93, the third parallel pipeline, and the second port of the first heat transfer component 11 are connected through the pipeline, and the refrigerant converging at the second interface flows to the second port of the first heat transfer component 11 after passing through the third parallel pipeline.

[0068] In this embodiment, the management system also has a defrost mode. When the external environment is low, turning on the defrost mode can be used to remove the frost condensed on the surface of the first heat exchanger 41. In this embodiment, defrosting can also be performed in the first mode. The first heat exchanger 41 has a fan for performing heat exchange processing. In the first mode, the fan of the first heat exchanger 41 is not started, so that when the refrigerant in a high-temperature and high-pressure state discharged from the gas compressor 2 flows through the first heat exchanger 41, the refrigerant exchanges heat with the frost condensed on the surface of the first heat exchanger 41, and the defrosting effect can be achieved.

[0069] In this embodiment, the heat supply module also includes a capillary tube 8, which is arranged in parallel with the electronic expansion valve 61 through a fourth parallel pipeline. The fourth parallel pipeline has a seventh end and an eighth end respectively arranged at both ends. The seventh end is connected to the pipeline between the first heat exchanger 41 and the electronic expansion valve 61, and the eighth end is connected to the pipeline between the electronic expansion valve 61 and the first port of the first heat transfer component 11. The capillary tube 8 is arranged on the fourth parallel pipeline. Specifically, the seventh end is connected to the pipeline between the fluid storage tank 5 and the first end of the first parallel pipeline, and the eighth end is connected to the pipeline between the third one-way valve 723 and the first port of the first heat transfer component 11. In the first mode, the capillary tube 8 can play an auxiliary regulation role, which is used to cooperate with the electronic expansion valve 61 to regulate the refrigerant so that the refrigerant in the first heat transfer component 11 is in a gas-liquid two-phase state.

[0070] In this embodiment, a sixth one-way valve 726 is provided between the capillary tube 8 and the eighth end, and the sixth one-way valve 726 only allows the refrigerant to flow in one direction from the seventh end to the eighth end. In the first mode and the third mode, the capillary tube 8 can assist in regulating the electronic expansion valve 61. In the second mode and the fourth mode, since the power pump 62 is turned on, the pressure at the outlet of the power pump 62 is greater than the pressure at the outlet, that is, the pressure at the second end of the first parallel pipeline is greater than the pressure at the first port, and the refrigerant can only move from the second end with high pressure to the first end with low pressure. Combined with the sixth one-way valve 726, the flow of the refrigerant can be prevented, thereby preventing the refrigerant from flowing back from the capillary tube 8. In the sixth mode, due to the setting of the sixth one-way valve 726, the refrigerant will not flow through the capillary tube 8, and the capillary tube 8 will not function.

[0071] In this embodiment, the heat supply module includes a four-way reversing valve 73, and the four-way reversing valve 73 includes four interfaces, namely, a first interface a, a second interface b, a third interface c and a fourth interface. The outlet of the gas compressor 2 is connected to the first interface a through a pipeline, the first heat exchanger 41 is connected to the second interface b through a pipeline, the gas-liquid separator 3 is connected to the third interface c through a pipeline, and the second heat exchanger 42 is connected to the fourth interface d through a pipeline. In the first mode, the second mode, the third mode and the fourth mode, the first interface a is connected to the second interface b, and the third interface c is connected to the fourth interface d; in the sixth mode, the first interface a is connected to the fourth interface d, and the second interface b is connected to the third interface c. In this embodiment, the four-way reversing valve 73 is electrically connected or communication connected to the controller, and the controller can control the four-way reversing valve 73 to switch.

[0072] The energy storage temperature control system of this embodiment, when the temperature of the energy storage battery 101 is higher than t1, and the ambient temperature of the energy storage system is higher than t2, the energy storage temperature control system turns on the first mode, and the temperature control system cools down the energy storage battery 101 and the energy storage converter 102 at the same time;

[0073] When the temperature of the energy storage battery 101 is higher than t1 and the ambient temperature of the energy storage system is lower than t2, the energy storage temperature control system turns on the second mode, and the temperature control system uses the power pump 62 to cool down the energy storage battery 101 and the energy storage converter 102 at the same time;

[0074] When the temperature of the energy storage battery 101 is higher than t3 but lower than t1, and the ambient temperature of the energy storage system is higher than t2, the energy storage temperature control system turns on the third mode, and the temperature control system only cools down the energy storage converter 102;

[0075] When the temperature of the energy storage battery 101 is higher than t3 but lower than t1, and the ambient temperature of the energy storage system is lower than t2, the energy storage temperature control system turns on the fourth mode, and the temperature control system uses the power pump 62 to cool the energy storage converter 102;

[0076] When the temperature of the energy storage battery 101 is lower than t4, the energy storage temperature control system turns on the sixth mode, and the heat supply module uses the refrigerant to heat the energy storage battery 101;

[0077] When it is detected that the temperature difference of the energy storage batteries 101 is greater than δt, the energy storage temperature control system turns on the fifth mode to balance the temperature of each energy storage battery 101 .

[0078] The above-mentioned t1, t2, t3, t4, and δt are all predetermined temperature thresholds, and t4<t1<t2<t3. In some preferred embodiments, 30℃≤t1≤35℃, 0℃≤t2≤5℃, 15℃≤t3≤30℃, 10℃≤t4≤15℃, and 3℃≤δt≤5℃.

[0079] In this embodiment, a pressure sensor is provided in the pipeline included in the heat supply module, and the pressure sensor is electrically connected or signal-connected to the controller. The pressure sensor includes a first pressure sensor provided at the inlet of the gas compressor 2 and a second pressure sensor provided at the outlet of the gas compressor 2. The controller is electrically or communicatively connected to the gas compressor 2, the power pump 62 and the electronic expansion valve 61. The controller can adjust the rotation speed of the gas compressor 2, the delivery speed of the power pump 62 and the opening of the electronic expansion valve 61 according to the detection value of the pressure sensor. Specifically, the first pressure sensor can obtain the pressure value P1 at the inlet of the gas compressor 2, and the second pressure sensor can obtain the pressure value P2 at the outlet of the gas compressor 2.

[0080] In the first mode or the third mode, the temperature value T1 at the second port of the second heat transfer component 12 is obtained, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1.

[0081] When Tp1<T1, reduce the speed of the gas compressor 2;

[0082] When Tp1>T1, the rotation speed of the gas compressor 2 is increased.

[0083] In the second mode or the fourth mode, the temperature value T1 at the second port of the second heat transfer component 12 is also obtained, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1.

[0084] When Tp1<T1, the delivery speed of the power pump 62 is reduced;

[0085] When Tp1>T1, the delivery speed of the power pump 62 is increased.

[0086] In the sixth mode, the pressure value P2 at the outlet of the gas compressor and the temperature T1' at the second port of the first heat transfer component 11 are obtained.

[0087] Compare the saturation temperature Tp2 of the refrigerant at pressure value P2 with T1',

[0088] When Tp2<T1', increase the speed of the gas compressor 2;

[0089] When Tp2>T1', the rotation speed of the gas compressor 2 is reduced.

[0090] In this embodiment, a temperature sensor is provided in the pipeline included in the heat supply module, and the controller is electrically or communicatively connected to the temperature sensor. The controller can obtain and analyze data from the temperature sensor and the pressure sensor, and adjust the opening of the electronic expansion valve 61 and the opening and closing of the fifth solenoid valve according to the analysis results, thereby adjusting the temperature or state of the refrigerant.

[0091] Specifically, the temperature sensor includes a first temperature sensor disposed between the second interface of the third branch pipeline 93 and the fifth end of the third parallel pipeline. In the first mode, the second mode, the third mode and the fourth mode, the first temperature sensor can be used to detect the temperature value T1. In the sixth mode, since the first temperature sensor is connected to the second port of the first heat transfer component 11 through a pipeline, and no other mechanism is disposed on the pipeline between the two, the temperature measured by the first temperature sensor is the above-mentioned temperature value T1'. In this way, the first temperature sensor can detect two different temperature values ​​in two modes, thereby reducing the setting of temperature sensors, saving resources and saving costs.

[0092] In this embodiment, the temperature sensor includes a second temperature sensor disposed at the inlet of the gas compressor 2, and the second temperature sensor is used to obtain the temperature T2 at the inlet of the gas compressor 2. In this embodiment, in the first mode, the second mode, the third mode, the fourth mode and the sixth mode,

[0093] When T2-Tp1>(Ta+db), the electronic expansion valve 61 opens wide;

[0094] When T2-Tp1<(Ta-db), the electronic expansion valve 61 is closed;

[0095] When (Ta-db)≤T2-Tp1≤(Ta+db), the electronic expansion valve 61 is maintained;

[0096] Wherein, Ta is the predetermined temperature threshold, and db is an empirical parameter;

[0097] In this embodiment, in the sixth mode,

[0098] When T1'-Tp2>Tb, the fifth solenoid valve 715 is opened;

[0099] When T1 ′-Tp2<Tc, the fifth solenoid valve 715 is closed.

[0100] Wherein, Tb and Tc are predetermined temperature thresholds, and Tb>Tc.

[0101] In this embodiment, the second heat exchanger 42 has a heat dissipation mechanism for the refrigerant to exchange heat with the surrounding environment, the first heat exchanger 41 has an air inlet, the heat dissipation mechanism is arranged at the air inlet, and the heat dissipation mechanism is located on the air inlet path of the first heat exchanger 41. In this way, in the sixth mode, the heat dissipated by the second heat exchanger 42 can enter the first heat exchanger 41 through the air inlet for secondary utilization, thereby avoiding energy waste.

[0102] In summary, the temperature control system of this embodiment, in the first mode, can cool the energy storage battery 101 and the energy storage inverter 102 at the same time by controlling the opening and closing of the valve by the controller; in the second mode, the energy storage inverter 102 can be cooled alone. When the ambient temperature is low, the second mode is turned on, and the power pump 62 can be used to cool the energy storage battery 101 and the energy storage inverter 102 at the same time. When the fourth mode is turned on, the energy storage temperature control system can use the power pump 62 to cool the energy storage inverter 102 alone. The energy storage temperature control system also has a sixth mode, which is a heating mode. In this mode, the energy storage battery 101 can be heated. When the temperature of the energy storage battery 101 is uneven, the fifth mode can be turned on to use the power pump 62 to eliminate the temperature difference of the energy storage battery 101. The energy storage temperature control system is rich in functions and has high energy efficiency.

[0103] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage temperature control system, comprising a heat supply module and a heat transfer module, characterized in that: The heat transfer module comprises a first heat transfer component (11) for performing heat exchange with an energy storage battery (101), and a second heat transfer component (12) for performing heat exchange with an energy storage converter (102), wherein the first heat transfer component (11) and the second heat transfer component (12) both have a first port, a second port, and a fluid channel connecting the first port and the second port; The heat supply module comprises a gas compressor (2), a first heat exchanger (41), an electronic expansion valve (61) and a power pump (62); the outlet of the gas compressor (2) is connected to the first heat exchanger (41) through a pipeline, the first heat exchanger (41) is connected to the electronic expansion valve (61) through a pipeline, the electronic expansion valve (61) is connected to the first port of the first heat transfer component (11) through a pipeline, the second port of the first heat transfer component (11) is connected to the first port of the second heat transfer component (12) through a pipeline, and the second port of the second heat transfer component (12) is connected to the inlet of the gas compressor (2) through a pipeline; the first heat exchanger (41) is connected to the inlet of the power pump (62) through a pipeline, the outlet of the power pump (62) is connected to the first port of the first heat transfer component (11) through a pipeline, and the second port of the second heat transfer component (12) is connected to the first heat exchanger (41) through a pipeline; The energy storage temperature control system has a first mode and a second mode. In the first mode, the gas compressor (2), the first heat exchanger (41), the electronic expansion valve (61), the fluid channel of the first heat transfer component (11), and the fluid channel of the second heat transfer component (12) are connected in sequence through pipelines to form a circulation loop; in the second mode, the power pump (62), the fluid channel of the first heat transfer component (11), the fluid channel of the second heat transfer component (12), and the first heat exchanger (41) are connected in sequence through pipelines to form a circulation loop; The energy storage temperature control system also includes a controller and a valve assembly for controlling the opening and closing of a pipeline. The heat supply module is connected to and controlled by the controller. The valve assembly is electrically connected to and controlled by the controller.

2. The energy storage temperature control system according to claim 1, characterized in that: The heat supply module comprises a first parallel branch and a second parallel branch, the first parallel branch comprises a first end and a second end respectively arranged at two ends, the first end is connected to the pipeline between the electronic expansion valve (61) and the first heat exchanger (41), the second end is connected to the pipeline between the electronic expansion valve (61) and the first heat transfer component (11), and the power pump (62) is arranged on the first parallel branch; the second parallel branch comprises a third end and a fourth end respectively arranged at two ends, the third end is connected to the pipeline between the second heat transfer component (12) and the inlet of the gas compressor (2), and the fourth end is connected to the pipeline at the outlet of the gas compressor (2); the valve assembly comprises a first solenoid valve (711) arranged on the pipeline between the inlet of the gas compressor (2) and the third end, or the first solenoid valve (711) is arranged between the outlet of the gas compressor (2) and the fourth end; When the power pump (62) is turned off, the electronic expansion valve (61) is turned on, and the first solenoid valve (711) is turned on, the first mode is turned on; when the power pump (62) is turned on, the electronic expansion valve (61) is turned off, and the first solenoid valve (711) is turned off, the second mode is turned on.

3. The energy storage temperature control system according to claim 1, characterized in that: The electronic expansion valve (61) is connected to the first port of the second heat transfer component (12) via a pipeline, and the energy storage temperature control system has a third mode. In the third mode, the fluid channels of the gas compressor (2), the first heat exchanger (41), the electronic expansion valve (61), and the second heat transfer component (12) are connected in sequence via the pipeline to form a circulation loop; And / or, the outlet of the power pump (62) is connected to the first port of the second heat transfer component (12) through a pipeline, and the energy storage temperature control system has a fourth mode. In the fourth mode, the power pump (62), the fluid channel of the second heat transfer component (12), and the first heat exchanger (41) are connected in sequence through the pipeline to form a circulation loop; And / or, the second port of the first heat transfer component (11) is connected to the inlet of the power pump (62) through a pipeline, and the energy storage temperature control system has a fifth mode. In the fifth mode, the fluid channels of the power pump (62) and the first heat transfer component (11) are connected through the pipeline to form a circulation loop; And / or, the heat supply module has a second heat exchanger (42), the second port of the first heat transfer component (11) is connected to the second heat exchanger (42) via a pipeline, the second heat exchanger (42) is connected to the inlet of the gas compressor (2) via a pipeline, the heat supply module includes a third branch pipeline (93), the third branch pipeline (93) has a first interface and a second interface respectively arranged at two ends, the first interface is connected to the pipeline between the gas compressor (2) and the second heat exchanger (42), and the second interface is connected to the pipeline between the second heat exchanger (42) and the second port of the first heat transfer component (11); The energy storage temperature control system has a sixth mode. In the sixth mode, the gas compressor (2), the second heat exchanger (42) / the third branch pipeline (93), the fluid channel in the first heat transfer component (11), the electronic expansion valve (61), and the first heat exchanger (41) are connected through pipelines to form a circulation loop.

4. The energy storage temperature control system according to claim 3, characterized in that: The energy storage temperature control system has a third mode, the heat supply module has a first branch pipeline (91), the first branch pipeline (91) has a first connecting end and a second connecting end respectively arranged at two ends, the first connecting end is connected to the pipeline between the electronic expansion valve (61) and the first heat transfer component (11), and the second connecting end is connected to the pipeline between the first heat transfer component (11) and the second heat transfer component (12); the valve assembly comprises a second solenoid valve (712) arranged on the first branch pipeline (91), and a third solenoid valve (713) arranged on the pipeline between the first connecting end and the first heat transfer component (11), or the third solenoid valve (713) is arranged on the pipeline between the second connecting end and the first heat transfer component (11); When the second solenoid valve (712) is closed and the third solenoid valve (713) is opened, the first mode is turned on; when the second solenoid valve (712) is opened and the third solenoid valve (713) is closed, the third mode is turned on.

5. The energy storage temperature control system according to claim 3, characterized in that: The energy storage temperature control system has a fifth mode, the heat supply module comprises a second branch pipeline (92), one end of the second branch pipeline (92) is connected to the pipeline between the first heat exchanger (41) and the power pump (62), and the other end of the second branch pipeline (92) is connected to the pipeline between the first heat transfer component (11) and the second heat transfer component (12); the valve assembly comprises a fourth solenoid valve (714) arranged on the second branch pipeline (92), and when the fourth solenoid valve (714) is opened, the power pump (62) is opened, and the electronic expansion valve is closed, the fifth mode is turned on.

6. The energy storage temperature control system according to claim 3, characterized in that: The energy storage temperature control system has a sixth mode, the valve assembly comprises a fifth solenoid valve (715) arranged between the first interface and the second heat exchanger (42), The second interface is connected to the second port of the second heat transfer component (12) via a pipeline, the heat supply module comprises a third parallel branch, the third parallel branch has a fifth end and a sixth end respectively arranged at two ends, the fifth end is connected to the pipeline between the second interface and the second heat transfer component (12), and the sixth end is connected to the pipeline between the first port of the second heat transfer component (12) and the second port of the first heat transfer component (11); When the energy storage temperature control system is in the first mode, the second mode, the third mode or the fourth mode, the fifth solenoid valve (715) is closed and the third parallel branch is closed; in the sixth mode, the fifth solenoid valve (715) can be opened and the third parallel branch is opened.

7. A control method for an energy storage temperature control system, based on the energy storage temperature control system according to claim 1, characterized in that: When the temperature of the energy storage battery (101) is higher than t1, and the ambient temperature of the energy storage system is higher than t2, the energy storage temperature control system turns on the first mode; When the temperature of the energy storage battery (101) is higher than t1 and the ambient temperature of the energy storage system is lower than t2, the energy storage temperature control system turns on the second mode; Both t1 and t2 are predetermined temperature thresholds, wherein 30°C≤t1≤35°C, and 0°C≤t2≤5°C.

8. The control method of the energy storage temperature control system according to claim 7, characterized in that: The electronic expansion valve (61) is connected to the first port of the second heat transfer component (12) via a pipeline. The energy storage temperature control system has a third mode. In the third mode, the fluid channels of the compressor (2), the first heat exchanger (41), the electronic expansion valve (61), and the second heat transfer component (12) are connected in sequence via the pipeline to form a circulation loop. When the temperature of the energy storage battery (101) is higher than t3 but lower than t1, and the ambient temperature of the energy storage system is higher than t2, the energy storage temperature control system turns on the third mode; wherein t3 is a predetermined temperature threshold, 15°C≤t3≤30°C.

9. The control method of the energy storage temperature control system according to claim 8, characterized in that: The outlet of the power pump (62) is connected to the first port of the second heat transfer component (12) via a pipeline, and the energy storage temperature control system has a fourth mode. In the fourth mode, the power pump (62), the fluid channel of the second heat transfer component (12), and the first heat exchanger (41) are connected in sequence via the pipeline to form a circulation loop. When the temperature of the energy storage battery (101) is higher than t3 but lower than t1, and the ambient temperature of the energy storage system is lower than t2, the energy storage temperature control system starts the fourth mode.

10. The control method of the energy storage temperature control system according to claim 9, characterized in that: The second port of the first heat transfer component (11) is connected to the inlet of the power pump (62) through a pipeline, and the energy storage temperature control system has a fifth mode. In the fifth mode, the fluid channels of the power pump (62) and the first heat transfer component (11) are connected through the pipeline to form a circulation loop. When the temperature difference of the energy storage battery (101) is greater than δt, the energy storage temperature control system turns on the fifth mode, wherein δt is a predetermined temperature threshold, 3°C≤δt≤5°C.

11. The control method of the energy storage temperature control system according to claim 10, characterized in that: The heat supply module comprises a second heat exchanger (42), the second port of the first heat transfer component (11) is connected to the second heat exchanger (42) via a pipeline, the second heat exchanger (42) is connected to the inlet of the gas compressor (2) via a pipeline, a third branch pipeline (93) is connected between the two pipelines, and the energy storage temperature control system has a sixth mode. In the sixth mode, the gas compressor (2), the second heat exchanger (42) / the third branch pipeline (93), the fluid channel in the first heat transfer component (11), the electronic expansion valve (61), and the first heat exchanger (41) are connected via pipelines to form a circulation loop. When the temperature of the energy storage battery (101) is lower than t4, the energy storage temperature control system starts the sixth mode; t4 is a predetermined temperature threshold, t4<t3, and 10°C≤t4≤15°C.

12. The control method of the energy storage temperature control system according to claim 11, characterized in that: When the energy storage temperature control system is in the first mode or the third mode, the pressure value P1 at the inlet of the gas compressor and the temperature value T1 at the second port of the second heat transfer component are obtained, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1. When Tp1<T1, reducing the rotation speed of the gas compressor; When Tp1>T1, increasing the speed of the gas compressor; When the energy storage temperature control system is in the second mode or the fourth mode, the pressure value P1 at the inlet of the gas compressor and the temperature value T1 at the second port of the second heat transfer component are obtained, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1. When Tp1<T1, reducing the delivery speed of the power pump; When Tp1>T1, increasing the delivery speed of the power pump; When the energy storage temperature control system is in the sixth mode, the pressure value P2 at the outlet of the gas compressor and the temperature T1' at the second port of the first heat transfer component are obtained, and the saturation temperature Tp2 corresponding to the refrigerant when the pressure value is P2 is compared with T1'. When Tp2<T1', increasing the speed of the gas compressor; When Tp2>T1', the rotation speed of the gas compressor is reduced.

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