Energy storage temperature control system and control method thereof

Abstract

The present application relates to a kind of energy storage temperature control system and its control method, energy storage temperature control system includes heat supply module and heat transfer module, the heat transfer module includes the first heat transfer component of heat exchange with energy storage battery, the second heat transfer component of heat exchange with energy storage converter;The heat supply module includes gas compressor, first heat exchanger, electronic expansion valve and power pump connected by pipeline, the energy storage temperature control system has first mode and second mode, in the first mode, the gas compressor, first heat exchanger, electronic expansion valve, first heat transfer component, second heat transfer component are sequentially connected by pipeline and form circulation loop;In the second mode, the power pump, first heat transfer component, second heat transfer component, first heat exchanger are sequentially connected by pipeline and form circulation loop;Temperature control system can simultaneously cool energy storage battery and energy storage converter, and energy efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to an energy storage temperature control system, in particular to an integrated temperature control system of a cooling system of an energy storage battery and a cooling system of an energy storage converter, and a control method of an energy storage temperature control system. BACKGROUND

[0002] An energy storage system is a device or system capable of storing energy, which can store excess energy and use it when needed. Energy storage systems are commonly used to improve energy utilization efficiency, reduce energy waste, improve power grid stability, etc. Energy storage systems can include batteries, supercapacitors, flywheels, hydraulic systems, etc. Among them, the battery is one of the most commonly used energy storage methods. Energy storage systems can be used in various application scenarios, such as power grid peak shaving, renewable energy grid connection, electric vehicle charging, home energy storage, etc.

[0003] When the energy storage system is running, the battery will generate a lot of heat, and if the heat cannot be removed in time, it will cause the temperature of the device to rise, which will cause 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 at a suitable stable temperature to play a role in energy storage, so it also needs to be heated when the ambient temperature is low. The power conversion system (PCS) is also a key control device in the energy storage system, and the power conversion system (PCS) is the second largest heat generating device after the battery, so the power conversion system (PCS) also needs to be temperature controlled to ensure the normal operation of the power conversion system (PCS) and the system.

[0004] In the existing thermal management system, the cooling system adopts air cooling, liquid cooling and direct cooling. Most battery cooling systems and energy storage converter cooling systems are independent of each other. Some cooling systems that use liquid cooling can integrate battery cooling and energy storage converter cooling functions, but the cooling system that uses liquid cooling needs to be twice heat exchanged when running, which has low thermal efficiency. At the same time, the cooling system that uses liquid cooling needs to set up a water pump to circulate the cooling liquid, which increases power consumption. SUMMARY

[0005] The problem to be solved by the present application is to provide a new energy storage temperature control system for an energy storage system, which can simultaneously cool the energy storage battery and the energy storage converter through a set of systems, and the temperature control system uses direct cooling, which has higher energy efficiency than liquid cooling and air cooling, and can save energy consumption.

[0006] To achieve the above object, the technical scheme adopted by the present application 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 heat exchange with an energy storage battery and a second heat transfer component for heat exchange with an energy storage converter, the first heat transfer component and the second heat transfer component each having a first port, a second port and a fluid channel connecting the first port and the second port;

[0007] The heat supply module comprises a gas compressor, a first heat exchanger, an electronic expansion valve and a power pump, the outlet of the gas compressor being connected to the first heat exchanger through a pipeline, the first heat exchanger being connected to the electronic expansion valve through a pipeline, the electronic expansion valve being connected to the first port of the first heat transfer component through a pipeline, the second port of the first heat transfer component being connected to the first port of the second heat transfer component through a pipeline, the second port of the second heat transfer component being connected to the inlet of the gas compressor through a pipeline; the first heat exchanger being connected to the inlet of the power pump through a pipeline, the outlet of the power pump being connected to the first port of the first heat transfer component through a pipeline, the second port of the second heat transfer component being 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 sequentially connected through pipelines and 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 sequentially connected through pipelines and form a circulation loop;

[0009] The energy storage temperature control system further comprises a controller and a valve assembly for controlling the opening and closing of the pipelines, the heat supply module being connected to the controller and being controlled by the controller, the valve assembly being electrically connected to the controller and being 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 arranged at two ends, the first end is connected to a pipeline between the electronic expansion valve and the first heat exchanger, the second end is connected to a pipeline between the electronic expansion valve and the first heat transfer component, the power pump is arranged on the first parallel branch; the second parallel branch has a third end and a fourth end arranged at two ends, the third end is connected to a pipeline between the second heat transfer component and the gas compressor inlet, the fourth end is connected to a pipeline at the gas compressor outlet; the valve assembly includes a first electromagnetic valve arranged on a pipeline between the inlet of the gas compressor and the third end, or the first electromagnetic valve is arranged between the outlet of the gas compressor and the fourth end.

[0011] When the power pump is closed, the electronic expansion valve is opened, and the first electromagnetic valve is opened, the first mode is started; when the power pump is opened, the electronic expansion valve is closed, and the first electromagnetic valve is closed, the second mode is started.

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

[0013] In some embodiments, the outlet of the power pump and the first port of the second heat transfer component are connected by a pipeline, the energy storage temperature control system has a fourth mode, in the fourth mode, the power pump, the fluid passage of the second heat transfer component, and the first heat exchanger are sequentially connected by pipelines and form a circulating loop.

[0014] In some embodiments, the second port of the first heat transfer component and the inlet of the power pump are connected by a pipeline, the energy storage temperature control system has a fifth mode, in the fifth mode, the power pump and the fluid passage of the first heat transfer component are connected by a pipeline and form a circulating loop.

[0015] In some embodiments, the heat supply module has a second heat exchanger, the second port of the first heat transfer component and the second heat exchanger are connected by a pipeline, the second heat exchanger and the inlet of the gas compressor are connected by a pipeline, the heat supply module includes a third branch pipeline, the third branch pipeline has a first interface and a second interface arranged at two ends, the first interface is connected to a pipeline between the gas compressor and the second heat exchanger, and the second interface is connected to a 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 which the gas compressor, the second heat exchanger / third branch pipeline, the fluid passage in the first heat transfer component, the electronic expansion valve, and the first heat exchanger are connected through pipelines and 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 having a first connection end and a second connection end arranged at two ends, the first connection end is connected to a pipeline between the electronic expansion valve and the first heat transfer component, and the second connection end is connected to a pipeline between the first heat transfer component and a second heat transfer component; the valve assembly includes a second electromagnetic valve arranged on the first branch pipeline, and a third electromagnetic valve arranged on a pipeline between the first connection end and the first heat transfer component, or the third electromagnetic valve is arranged on a pipeline between the second connection end and the first heat transfer component.

[0018] When the second electromagnetic valve is closed and the third electromagnetic valve is opened, the first mode is started; when the second electromagnetic valve is opened and the third electromagnetic valve is closed, the third mode is started.

[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 a pipeline between the first heat exchanger and the power pump, and the other end of the second branch pipeline is connected to a pipeline between the first heat transfer component and the second heat transfer component; the valve assembly includes a fourth electromagnetic valve arranged on the second branch pipeline, and when the fourth electromagnetic valve is opened, the power pump is opened, and the electronic expansion valve is closed, the fifth mode is started.

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

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

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

[0023] Another object of the present application is to provide a control method of an energy storage temperature control system. To achieve the above object, the present application adopts the technical solution of: a control method of 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 starts 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 starts the second mode;

[0025] t1 and t2 are both predetermined temperature thresholds, wherein 30℃≤t1≤35℃ and 0℃≤t2≤5℃.

[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 starts the third mode; wherein t3 is a predetermined temperature threshold, 15℃≤t3≤30℃.

[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 starts 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 starts the fifth mode, wherein δt is a predetermined temperature threshold, 3℃≤δt≤5℃.

[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 starts the sixth mode; t4 is a predetermined temperature threshold, t4

[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 saturated temperature Tp1 of the refrigerant corresponding to the pressure value P1 is compared with T1,

[0031] When Tp1

[0032] When Tp1

[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 acquired. The saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1.

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

[0035] When Tp1 > T1, increase 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 acquired. The saturation temperature Tp2 corresponding to the refrigerant when the pressure value is P2 is compared with T1'.

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

[0038] When Tp2 > T1', reduce the speed of the gas compressor.

[0039] Due to the application of the above technical solution, this invention has the following advantages compared with the prior art: This invention employs an energy storage temperature control system that can simultaneously exchange heat between the energy storage battery and the energy storage converter. Furthermore, the temperature control system uses direct cooling, which saves energy and improves efficiency compared to air cooling and liquid cooling. The energy storage temperature control system also has a first mode and a second mode. In the first mode, a gas compressor drives the refrigerant to flow in a circulation loop to achieve heat exchange between the energy storage battery and the energy storage converter. When the outdoor temperature is low, the energy storage temperature control system can switch to the second mode, in which a power pump drives the refrigerant to flow in the loop, resulting in even greater energy savings compared to the first mode. Compared with the prior art, this invention can be used for thermal management of high-energy-density energy storage boxes, and it has advantages over existing temperature control systems in at least one aspect, such as cost, energy efficiency, and stability. Attached Figure Description

[0040] Appendix Figure 1 This 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] Appendix Figure 2 This is a schematic diagram of the energy storage temperature control system in the second mode of this embodiment;

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

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

[0044] Figure 8 is a schematic diagram of the energy storage temperature control system in the fifth mode of the embodiment; Figure 5

[0045] Figure 9 is a schematic diagram of the energy storage temperature control system in the sixth mode of the embodiment; Figure 6

[0046] Figure 10 is a flowchart of the control method of the energy storage temperature control system of the embodiment; Figure 7

[0047] Wherein: 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 electromagnetic valve; 712, second electromagnetic valve; 713, third electromagnetic valve; 714, fourth electromagnetic valve; 715, fifth electromagnetic valve; 721, first check valve; 722, second check valve; 723, third check valve; 724, fourth check valve; 725, fifth check valve; 726, sixth check 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 with reference to the drawings, so that the advantages and features of the present application are easier for those skilled in the art to understand. Obviously, the embodiments described in the present application are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] Reference is made to Figure 1 ​​​The 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 the energy storage battery 101 and a second heat transfer component 12 for heat exchange with the energy storage converter 102. The first heat transfer component 11 and the second heat transfer component 12 each 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 a shape such that the pressure difference when the fluid flows from the first port to the second port through the fluid channel is less than a preset value, thereby controlling the pressure drop between the first port and the second port. After the refrigerant is introduced into the fluid channel of the first heat transfer component 11, the temperature difference between the first port and the second port can be controlled, the temperature of the refrigerant in the fluid channel is uniform, and the heat exchange effect of 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 sequentially connected by pipelines and 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 sequentially connected by pipelines and form a circulation loop. When the temperature of the energy storage battery 101 and the energy storage converter 102 is high and the ambient temperature is higher than a preset value, the energy storage temperature control system starts the first mode. In this mode, the refrigerant flows in the circulation loop under the drive of the gas compressor 2, and the heat supply module simultaneously cools the energy storage battery 101 and the energy storage converter 102. When the temperature of the energy storage battery 101 and the energy storage converter 102 is high and the ambient temperature is lower than a preset value, the energy storage temperature control system starts the second mode. In this mode, the refrigerant flows in the circulation loop under the drive of the power pump 62 and cools the energy storage battery 101 and the energy storage converter 102. In this embodiment, the power pump 62 is a fluorine pump, which has higher efficiency than the gas compressor 2. At the same time, the fluorine pump has higher energy efficiency ratio, can more effectively utilize electric energy, reduce energy consumption, and can 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 arranged 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 sequentially connected by pipelines and 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 sequentially connected by pipelines and form a circulation loop.

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

[0054] In the first mode, the gas compressor 2 discharges high-temperature and high-pressure gas state refrigerant, the first heat exchanger 41 cools the refrigerant flowing therethrough, the refrigerant continues to flow through the electronic expansion valve 61 and changes into a gas-liquid two-phase state, 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, and 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 changes into a gas state, the gas state refrigerant flows back to the gas compressor 2 after flowing through the gas-liquid separator 3.

[0055] In the embodiment, the energy storage battery 101 is provided in multiple groups, each group of the energy storage battery 101 is provided with one first heat transfer component 11, the first ports of the multiple first heat transfer components 11 are connected to each other, the second ports of the multiple first heat transfer components 11 are connected to each other, and the multiple first heat transfer components 11 are connected in parallel with each other. In some preferred embodiments, liquid distributors are arranged at the interfaces of the first ports of the multiple first heat transfer components 11 and the interfaces of the second ports of the multiple first heat transfer components 11, for uniformly distributing the refrigerant into each first heat transfer component 11. In another embodiment, a distribution valve is arranged on each parallel pipeline formed between the multiple first heat transfer components 11, for controlling the flow of the refrigerant, thereby ensuring uniform distribution of the refrigerant.

[0056] In the embodiment, the energy storage temperature control system further comprises 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, and the controller controls the switching of the energy storage temperature control system between different modes by controlling the valve assembly.

[0057] In the embodiment, the heat supply module has a first parallel branch and a second parallel branch. The first parallel branch has a first end portion and a second end portion arranged at two ends. The first end portion is connected to a pipeline between the electronic expansion valve 61 and the first heat exchanger 41, and the second end portion is connected to a 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 a pipeline between the first heat exchanger 41 and the first end portion. The second parallel branch has a third end portion and a fourth end portion arranged at two ends. The third end portion is connected to a pipeline between the second heat transfer component 12 and the inlet of the gas compressor 2, and the fourth end portion is connected to a pipeline at the outlet of the gas compressor 2. The gas-liquid separator 3 is arranged on a pipeline between the third end portion and the second heat transfer component 12. The valve assembly includes a first electromagnetic valve 711 arranged on a pipeline between the inlet of the gas compressor 2 and the third end portion, or the first electromagnetic valve 711 is arranged on a pipeline between the outlet of the gas compressor 2 and the fourth end portion. When the power pump 62 is closed, the electronic expansion valve 61 is opened, and the first electromagnetic valve 711 is opened, the first mode is started. When the power pump 62 is opened, the electronic expansion valve 61 is closed, and the first electromagnetic valve 711 is closed, the second mode is started.

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

[0059] In the 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 sequentially connected through a pipeline and 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 sequentially connected through a pipeline and form a circulation loop. When the energy storage battery 101 does not need to be cooled, the third mode is started, and in this mode, the energy storage inverter can be cooled alone. In the circulation loop of the third mode, the gas compressor 2 discharges the refrigerant in a high-temperature and high-pressure gas state, the first heat exchanger 41 cools the refrigerant flowing therethrough, the refrigerant continues to flow forward through the electronic expansion valve 61, 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 of the second port of the second heat transfer component 12 is converted into a gas state. After the gas-state refrigerant flows through the gas-liquid separator 3, it flows back to the gas compressor 2.

[0060] In the embodiment, the heat supply module has a first branch pipeline 91, the first branch pipeline 91 has a first connection end and a second connection end separately 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 electromagnetic valve 712 arranged on the first branch pipeline 91, and a third electromagnetic valve 713 arranged on the pipeline between the first connection end and the first heat transfer component 11, or the third electromagnetic valve 713 is arranged on the pipeline between the second connection end and the first heat transfer component 11. When the second electromagnetic valve 712 is closed and the third electromagnetic valve 713 is opened, the first mode is started; when the second electromagnetic valve 712 is opened and the third electromagnetic valve 713 is closed, the third mode is started.

[0061] In the 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 sequentially connected through pipelines and form a circulation loop. When the external environment 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 the embodiment, the third electromagnetic valve 713 is arranged on the pipeline between the second end of the first parallel pipeline and the first interface, or the third electromagnetic valve 713 is arranged 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 opened, the electronic expansion valve 61 is closed, the first electromagnetic valve 711 is closed, the second electromagnetic valve 712 is opened, and the third electromagnetic valve 713 is closed, the fourth mode is started.

[0062] In the 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 a pipeline and 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 a pipeline and form a circulation loop. When there is a temperature difference between the plurality of energy storage batteries 101, i.e., the temperatures of the plurality of energy storage batteries 101 are inconsistent, the fifth mode is started, and the refrigerant is circulated in the circulation loop by the power pump 62, so that the temperatures of the plurality of energy storage batteries 101 are balanced.

[0063] In the 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 electromagnetic valve 714 arranged on the second branch pipeline 92. When the fourth electromagnetic valve 714 is opened, the power pump 62 is opened, and the electronic expansion valve is closed, the fifth mode is started.

[0064] In the embodiment, the heat supply module has a second heat exchanger 42, the second port of the first heat transfer component 11 is connected with the second heat exchanger 42 through a pipeline, the second heat exchanger 42 is connected with the inlet of the gas compressor 2 through a pipeline, the heat supply module comprises a third branch pipeline 93, the third branch pipeline 93 has a first interface and a second interface separately arranged at two ends, the first interface is connected on the pipeline between the gas compressor 2 and the second heat exchanger 42, and the second interface is connected on 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 / 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 and form a circulating loop. Specifically, in the sixth mode, the gas compressor 2, the second heat exchanger 42 / 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 and form a circulating 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 the embodiment, the valve assembly comprises a fifth electromagnetic valve 715 arranged between the first interface and the second heat exchanger 42, in the first mode, the second mode, the third mode and the fourth mode of the energy storage temperature control system, the fifth electromagnetic valve 715 is closed; in the sixth mode, the fifth electromagnetic valve 715 can be opened. Specifically, in the sixth mode, the gas compressor 2 discharges high-temperature and high-pressure gaseous refrigerant, the fifth electromagnetic valve 715 can be opened, so that part of the refrigerant discharged from the gas compressor 2 can flow to the second interface directly through the third branch pipeline 93, and the other part of the refrigerant discharged from the gas compressor 2 can flow through the second heat exchanger 42 for heat exchange treatment, so as to be converted from gaseous state to liquid state, and then flow to the second interface. In the second interface, the two parts of the refrigerant are combined 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, so as to increase the temperature of the energy storage battery 101, the refrigerant flows out from the first port of the first heat transfer component 11, then flows through the first heat exchanger 41 for heat exchange treatment and is converted into gaseous state, and the gaseous refrigerant flows through the gas-liquid separator 3 and then flows to the gas compressor 2.

[0066] In the working of the energy storage system, the energy storage converter usually does not need to be heated. In the 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 arranged 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 allow the refrigerant to flow only in one direction from the second port of the second heat transfer component 12 to the third branch pipeline 93. In the first mode, the second mode, the third mode and the fourth mode, the refrigerant cooled by 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 prevented from flowing to the second heat transfer component 12 by the fourth one-way valve 724.

[0067] In the embodiment, the heat supply module includes a third parallel branch having a fifth end and a sixth end 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. In the first mode, the second mode, the third mode and the fourth mode of the energy storage temperature control system, the third parallel branch is closed; in the sixth mode, the third parallel branch is opened. Specifically, a fifth one-way valve 725 is arranged on the third parallel pipeline, and the fifth one-way valve 725 is configured to allow the refrigerant to flow only 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 / third branch pipeline 93, the third parallel pipeline, and the second port of the first heat transfer component 11 are connected through a pipeline, and the refrigerant flowing at the second interface flows to the second port of the first heat transfer component 11 through the third parallel pipeline.

[0068] In the embodiment, the management system also has a defrosting mode, which can be used to remove the frost condensed on the surface of the first heat exchanger 41 when the external environment is low. In the first mode, defrosting can also be performed, and the first heat exchanger 41 has a fan for performing heat exchange treatment. 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 the embodiment, the heat supply module further comprises a capillary tube 8, the capillary tube 8 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 arranged at two 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, and 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 adjustment 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 the embodiment, a sixth one-way valve 726 is arranged between the capillary tube 8 and the eighth end, and the sixth one-way valve 726 is only used for one-way flow of the refrigerant from the seventh end to the eighth end. In the first mode and the third mode, the capillary tube 8 can assist in adjusting the electronic expansion valve 61. In the second mode and the fourth mode, since the power pump 62 is opened, 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, and the flow of the refrigerant can be prevented by the sixth one-way valve 726, thereby preventing the refrigerant from flowing back from the capillary tube 8. In the sixth mode, since the sixth one-way valve 726 is arranged, the refrigerant also cannot flow through the capillary tube 8, and the capillary tube 8 does not play a role.

[0071] In the embodiment, the heat supply module comprises a four-way reversing valve 73, the four-way reversing valve 73 comprises four interfaces, that is, a first interface a, a second interface b, a third interface c and a fourth interface d, 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 the embodiment, the four-way reversing valve 73 is electrically connected or communicatively connected to the controller, and the controller can control the four-way reversing valve 73 to switch.

[0072] 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 opens the first mode, and the temperature control system simultaneously cools the energy storage battery 101 and the energy storage converter 102.

[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 starts the second mode, and the temperature control system cools the energy storage battery 101 and the energy storage converter 102 at the same time by using the power pump 62;

[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 starts the third mode, and the temperature control system only cools 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 starts the fourth mode, and the temperature control system cools the energy storage converter 102 by using the power pump 62;

[0076] When the temperature of the energy storage battery 101 is lower than t4, the energy storage temperature control system starts the sixth mode, and the heat supply module heats the energy storage battery 101 by using the refrigerant;

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

[0078] The above-mentioned t1, t2, t3, t4 and δt are 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 the embodiment, the pipeline of the heat supply module is provided with a pressure sensor, which is electrically or signal connected with the controller. The pressure sensor includes a first pressure sensor arranged at the inlet of the gas compressor 2 and a second pressure sensor arranged at the outlet of the gas compressor 2. The controller is electrically or communicatively connected with the gas compressor 2, the power pump 62 and the electronic expansion valve 61, and can adjust the rotating speed of the gas compressor 2, the conveying speed of the power pump 62 and the opening degree 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 with the pressure value P1 is compared with T1,

[0081] When Tp1 < T1, the rotating speed of the gas compressor 2 is reduced;

[0082] When Tp1>T1, increase the rotational speed of the gas compressor 2.

[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 saturated temperature Tp1 of the refrigerant at the pressure value P1 is compared with T1,

[0084] When Tp1

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

[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] The saturated temperature Tp2 of the refrigerant at the pressure value P2 is compared with T1',

[0088] When Tp2

[0089] When Tp2>T1', decrease the rotational speed of the gas compressor 2.

[0090] In the embodiment, the pipeline of the heat supply module is provided with a temperature sensor, and the controller is electrically connected or communicatively connected with the temperature sensor. The controller can obtain and analyze the data of the temperature sensor and the pressure sensor, and adjust the opening degree of the electronic expansion valve 61 and the opening and closing of the fifth electromagnetic valve according to the analysis result, so as to adjust the temperature or state of the refrigerant.

[0091] Specifically, the temperature sensor includes a first temperature sensor arranged 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 with the second port of the first heat transfer component 11 through the pipeline, and no other mechanism is arranged between the pipeline, the temperature detected by the first temperature sensor is the temperature value T1'. In this way, two different temperature values in two modes can be detected by the first temperature sensor, the number of temperature sensors is reduced, resources are saved, and costs are saved.

[0092] In the embodiment, the temperature sensor includes a second temperature sensor arranged 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 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 is opened.

[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 a predetermined temperature threshold, and db is an empirical parameter;

[0097] In the sixth mode in the embodiment,

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

[0099] When T1'-Tp2

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

[0101] In the embodiment, the second heat exchanger 42 has a heat dissipation mechanism for heat exchange between the refrigerant and the ambient 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 waste of energy.

[0102] In summary, the temperature control system in the embodiment can simultaneously cool the energy storage battery 101 and the energy storage converter 102 in the first mode by controlling the opening and closing of the valves; can cool the energy storage converter 102 alone in the second mode. When the ambient temperature is low, the second mode is started, and the power pump 62 can be used to simultaneously cool the energy storage battery 101 and the energy storage converter 102. When the fourth mode is started, the energy storage temperature control system can use the power pump 62 to cool the energy storage converter 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 not balanced, the fifth mode can be started to use the power pump 62 to eliminate the temperature difference of the energy storage battery 101. The energy storage temperature control system has rich functions and high energy efficiency.

[0103] 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 shall be covered within the protection scope of the present application.

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 includes a first heat transfer component (11) for exchanging heat with the energy storage battery (101) and a second heat transfer component (12) for exchanging heat with the energy storage converter (102). The first heat transfer component (11) and the second heat transfer component (12) each have a first port, a second port and a fluid channel connecting the first port and the second port. 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) via a pipeline. The first heat exchanger (41) is connected to the electronic expansion valve (61) via a pipeline. The electronic expansion valve (61) is connected to the first port of the first heat transfer component (11) via 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) via a pipeline. The second port of the second heat transfer component (12) is connected to the inlet of the gas compressor (2) via a pipeline. The first heat exchanger (41) is connected to the inlet of the power pump (62) via a pipeline. The outlet of the power pump (62) is connected to the first port of the first heat transfer component (11) via a pipeline. The second port of the second heat transfer component (12) is connected to the first heat exchanger (41) via a pipeline. The energy storage temperature control system has a first mode and a second mode. In the first mode, the fluid channels of the gas compressor (2), the first heat exchanger (41), the electronic expansion valve (61), the first heat transfer component (11), and the second heat transfer component (12) are connected in sequence through pipelines to form a circulation loop. In the second mode, the fluid channels of the power pump (62), the first heat transfer component (11), 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 pipelines. The heat supply module is connected to and controlled by the controller, and 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 has a first parallel branch and a second parallel branch. The first parallel branch has a first end and a second end located at both ends. The first end is connected to the pipeline between the electronic expansion valve (61) and the first heat exchanger (41), and 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 located on the first parallel branch. The second parallel branch has a third end and a fourth end located at both 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 includes a first solenoid valve (711) located on the pipeline between the inlet of the gas compressor (2) and the third end, or the first solenoid valve (711) located between the outlet of the gas compressor (2) and the fourth end. When the power pump (62) is off, the electronic expansion valve (61) is on, and the first solenoid valve (711) is on, the first mode is activated; when the power pump (62) is on, the electronic expansion valve (61) is off, and the first solenoid valve (711) is off, the second mode is activated.

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) through a pipeline. 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 through pipelines 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 pipelines 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 a 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) through a pipeline, the second heat exchanger (42) is connected to the inlet of the gas compressor (2) through 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 disposed 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 the sixth mode, the gas compressor (2), the second heat exchanger (42) / 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 pipe (91). The first branch pipe (91) has a first connection end and a second connection end located at both ends. The first connection end connects the pipe between the electronic expansion valve (61) and the first heat transfer component (11). The second connection end connects the pipe between the first heat transfer component (11) and the second heat transfer component (12). The valve assembly includes a second solenoid valve (712) disposed on the first branch pipe (91) and a third solenoid valve (713) disposed on the pipe between the first connection end and the first heat transfer component (11), or the third solenoid valve (713) is disposed on the pipe 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 activated; when the second solenoid valve (712) is opened, the third solenoid valve (713) is closed, and the third mode is activated.

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 includes a second branch pipe (92). One end of the second branch pipe (92) is connected to the pipe between the first heat exchanger (41) and the power pump (62). The other end of the second branch pipe (92) is connected to the pipe 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 pipe (92). When the fourth solenoid valve (714) is open, the power pump (62) is open, and the electronic expansion valve is closed, the fifth mode is activated.

6. The energy storage temperature control system according to claim 3, characterized in that, The energy storage temperature control system has a sixth mode, and the valve assembly includes a fifth solenoid valve (715) disposed 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) through a pipeline. The heat supply module includes a third parallel branch. The third parallel branch has a fifth end and a sixth end located at both ends. The fifth end is connected to the pipeline between the second interface and the second heat transfer component (12). 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, second mode, third mode or 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 of 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 activates 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 activates the second mode. t1 and t2 are both predetermined temperature thresholds, where 30℃≤t1≤35℃ and 0℃≤t2≤5℃.

8. The control method for 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 bulk compressor (2), the first heat exchanger (41), the electronic expansion valve (61), and the second heat transfer component (12) are sequentially connected via pipelines 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 activates the third mode; wherein, t3 is a predetermined temperature threshold, 15℃≤t3≤30℃.

9. The control method for 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. 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 sequentially connected via pipelines 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 activates the fourth mode.

10. The control method for 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. 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 a 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 activates the fifth mode, where δt is a predetermined temperature threshold, 3℃≤δt≤5℃.

11. The control method for the energy storage temperature control system according to claim 10, characterized in that, 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. A third branch pipeline (93) is connected between the two pipelines. The energy storage temperature control system has a sixth mode. In the sixth mode, the gas compressor (2), the second heat exchanger (42) / 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. When the temperature of the energy storage battery (101) is lower than t4, the energy storage temperature control system activates the sixth mode; t4 is a predetermined temperature threshold, t4 < t3, and 10℃ ≤ t4 ≤ 15℃.

12. The control method for 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 acquired, and the saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1. When Tp1 < T1, reduce the speed of the gas compressor; When Tp1 > T1, increase 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 acquired. The saturation temperature Tp1 corresponding to the refrigerant when the pressure value is P1 is compared with T1. When Tp1 < T1, reduce the delivery speed of the power pump; When Tp1 > T1, increase 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 acquired. The saturation temperature Tp2 corresponding to the refrigerant when the pressure value is P2 is compared with T1'. When Tp2 < T1', increase the speed of the gas compressor; When Tp2 > T1', reduce the speed of the gas compressor.

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