A thermal energy system for a flow battery

Abstract

The utility model provides a kind of thermal system of liquid flow battery, including electrolyte positive pole circulation system and electrolyte negative pole circulation system connected in the positive pole of reaction electric pile;Electrolyte positive pole circulation system is connected with heat exchange system;Heat exchange system includes heat exchange evaporator, regulating valve and condenser;Wherein, the outlet of condenser is connected with the inlet of regulating valve, the outlet of regulating valve is connected with the first inlet of heat exchange evaporator, the first outlet of heat exchange evaporator is connected with the inlet of condenser, regulating valve is electrically connected with auxiliary controller, and heat energy recovery system is connected on condenser;The second outlet of heat exchange evaporator is connected with electrolyte positive pole circulation system, and the second inlet of heat exchange evaporator is connected with the electrolyte positive pole outlet of reaction electric pile.The system realizes accurate control of electrolyte temperature and effective recovery of waste heat through the collaborative operation of heat exchange evaporator, regulating valve and condenser.

Description

Technical Field

[0001] This utility model belongs to the field of flow battery technology, specifically to a thermal energy system for a flow battery. Background Technology

[0002] Currently, the sustained and rapid growth of electricity demand in China has led to an imbalance between power supply and demand in some regions, especially during peak electricity demand periods, highlighting the limitations of the power grid's capacity and power generation capabilities. To alleviate this pressure and optimize power allocation, the installation of battery energy storage systems for refined load management can effectively reduce grid pressure. Flow batteries, due to their long cycle life, high safety, environmental friendliness, and high cost-effectiveness over their life cycle, have significant advantages in the context of large-scale integration of renewable energy. However, the temperature of flow batteries fluctuates during use. The conventional method involves pumping coolant into pipes inside the battery casing using a water pump, causing a rapid decrease in the temperature of the cooling plates and pipes. As the electrolyte passes through the cooling pipes, its temperature is lowered. When the electrolyte temperature inside the casing becomes too low, current is applied to the heating plate, causing it to heat up rapidly. As the electrolyte passes through the through-holes, its temperature rises, thus maintaining a constant electrolyte temperature. While this achieves temperature control, it does not effectively recover the heat generated by the electrolyte, resulting in energy waste. Utility Model Content

[0003] To address the problem that existing flow batteries cannot effectively recover the heat generated by the electrolyte during the cooling process by pumping it into the coolant, this invention provides a thermal energy management system for flow batteries.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This invention proposes a thermal energy system for a flow battery, comprising an electrolyte positive electrode circulation system connected to the positive electrode of the reactor stack and an electrolyte negative electrode circulation system connected to the negative electrode; the electrolyte positive electrode circulation system is connected to a heat exchange system; The heat exchange system includes a heat exchange evaporator, a control valve, and a condenser; wherein, the outlet of the condenser is connected to the inlet of the control valve, the outlet of the control valve is connected to the first inlet of the heat exchange evaporator, the first outlet of the heat exchange evaporator is connected to the inlet of the condenser, the control valve is electrically connected to an auxiliary controller, and a heat recovery system is connected to the condenser. The second outlet of the heat exchange evaporator is connected to the electrolyte positive electrode circulation system, and the second inlet of the heat exchange evaporator is connected to the electrolyte positive electrode outlet of the reactor.

[0005] Preferably, the electrolyte positive electrode circulation system includes a positive electrode storage tank and a first circulation pump. The inlet of the positive electrode storage tank is connected to the second outlet of the heat exchange evaporator, the outlet of the positive electrode storage tank is connected to the inlet of the first circulation pump, and the outlet of the first circulation pump is connected to the electrolyte positive electrode inlet of the reactor stack.

[0006] Preferably, the heat exchange evaporator includes a heat exchanger and an evaporator, wherein the first outlet and the first inlet are disposed on the heat exchanger, and the second inlet and the second outlet are disposed on the evaporator.

[0007] Preferably, a check valve is connected between the outlet of the condenser and the inlet of the control valve; A first flow-limiting valve and an expansion valve are connected in series between the second inlet of the evaporator and the outlet of the control valve.

[0008] Preferably, a compressor is provided between the second outlet of the evaporator and the inlet of the condenser, and a ventilator and an exhaust fan are provided between the compressor and the inlet of the condenser.

[0009] Preferably, a temperature sensor and a second flow limiting valve are provided between the outlet of the positive electrode storage tank and the inlet of the first circulation pump, and the temperature sensor is electrically connected to the auxiliary controller. The auxiliary controller is also electrically connected to an audible and visual alarm device installed on the positive electrode of the reactor stack.

[0010] Preferably, the electrolyte negative electrode circulation system includes a negative electrode storage tank and a second circulation pump. The inlet of the negative electrode storage tank is connected to the electrolyte negative electrode outlet of the reactor, the outlet of the negative electrode storage tank is connected to the inlet of the second circulation pump, and the outlet of the second circulation pump is connected to the electrolyte negative electrode inlet of the reactor.

[0011] Preferably, a third flow limiting valve is provided between the outlet of the negative electrode storage tank and the inlet of the second circulation pump, and the auxiliary controller is also electrically connected to a concentration sensor disposed on the negative electrode of the reactor stack.

[0012] Preferably, the system further includes a preheating system, which includes a first preheater, a second preheater, and a preheating controller, wherein the preheating controller is electrically connected to the first preheater and the second preheater; The first preheater is located between the inlet of the negative electrode storage tank and the negative electrode outlet of the electrolyte of the reactor, and the second preheater is located between the second inlet of the heat exchange evaporator and the positive electrode outlet of the electrolyte of the reactor.

[0013] Preferably, the heat recovery system includes a heat storage tank, a heat exchanger, and a generator, with the inlet of the heat storage tank directly connected to the outlet of the condenser; The heat exchanger and the generator are connected in series to form a heat energy loop branch, which is connected between the inlet of the heat storage tank and the outlet of the condenser.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: This invention proposes a thermal energy system for a flow battery. Through the coordinated operation of a heat exchange evaporator, a control valve, and a condenser, this system achieves precise temperature control of the electrolyte and effective waste heat recovery. Specifically, when the high-temperature positive electrode electrolyte flows from the positive electrode outlet of the reactor stack into the second inlet of the heat exchange evaporator, the heat it carries is exchanged within the evaporator, thereby rapidly and directly reducing the temperature of the positive electrode electrolyte to a preset temperature. The electrolyte is then input into the reactor stack for reuse, effectively avoiding side reactions caused by overheating of the positive electrode electrolyte. The system effectively mitigates the degradation of materials and battery performance, ensuring the stability and long lifespan of the fuel cell stack. Simultaneously, the vaporized refrigerant from the heat exchange evaporator is fed into the condenser for condensation. During condensation, the waste heat absorbed by the positive electrolyte is released and effectively collected and utilized by the heat recovery system on the condenser. This improves the energy efficiency of the flow battery, enhancing the system's economy and environmental friendliness, strengthening its adaptability and energy efficiency. It achieves highly efficient synergistic production and utilization of electrical and thermal energy, significantly reducing overall operating costs and extending equipment lifespan.

[0015] Furthermore, in the positive electrode circulation system of this system, the cooperation between the positive electrode storage tank and the first circulation pump, and the cooperation between the negative electrode storage tank and the second circulation pump, ensure the stability of the temperature and flow rate of the positive electrode electrolyte and the stability of the flow rate of the negative electrode electrolyte.

[0016] Furthermore, the heat exchange evaporator of this system achieves the initial heat exchange between the electrolyte and the refrigerant through the heat exchanger, and then completes the phase change heat absorption of the refrigerant through the evaporator, which not only prevents pollution and improves safety, but also avoids excessive load on a single device.

[0017] Furthermore, this system connects a check valve between the condenser and the control valve to prevent refrigerant from flowing back into the condenser and affecting the system's heat exchange. An expansion valve between the evaporator and the control valve reduces the pressure and temperature of the refrigerant supplied to the first flow-limiting valve, ensuring that the refrigerant input to the evaporator is a low-temperature and low-pressure liquid. The first flow-limiting valve further controls the flow rate of the refrigerant in the evaporator, preventing excessive or insufficient flow that could lead to low heat exchange efficiency.

[0018] Furthermore, this system incorporates a compressor between the evaporator and the condenser. The compressor heats and pressurizes the refrigerant, which is vaporized at low temperature and pressure, before feeding it into the condenser for heat exchange. After heat exchange, the refrigerant is cooled and depressurized through an expansion valve to ensure the stability of heat exchange in the evaporator. Attached Figure Description

[0019] Figure 1 This is a connection diagram of a thermal energy management system for a flow battery proposed in this utility model. In the attached diagram: 1. Heat storage tank; 2. Heat exchanger; 3. Generator; 4. Condenser; 5. Exhaust fan; 6. Ventilator; 7. Check valve; 8. Control valve; 9. Controller; 10. Compressor; 11. Heat exchange evaporator; 12. First flow limiting valve; 13. Expansion valve; 14. Preheat controller; 15. First preheater; 16. Concentration sensor; 17. Negative electrode storage tank; 18. Positive electrode storage tank; 19. Second preheater; 20. Audible and visual alarm; 21. Second flow limiting valve; 22. Temperature sensor; 23. First circulation pump; 24. Reactor stack; 25. Second circulation pump; 26. Third flow limiting valve; 27. Auxiliary controller. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] This invention proposes a thermal energy system for a flow battery, such as... Figure 1As shown, the reactor includes a flow battery redox reaction reactor 24. An electrolyte positive electrode circulation system is connected between the positive electrode outlet and the positive electrode inlet of the reactor 24, and an electrolyte negative electrode circulation system is connected between the negative electrode outlet and the negative electrode inlet of the reactor 24. The electrolyte positive electrode circulation system is connected to a heat exchange system. Positive electrolyte is supplied to the positive electrode of the reactor 24 through the positive electrode circulation system, and negative electrolyte is supplied to the negative electrode of the reactor 24 through the negative electrode circulation system. The positive and negative electrolytes undergo a chemical reaction in the reactor 24, converting chemical energy into electrical energy. The positive electrolyte after the chemical reaction is then fed into the heat exchange system for heat exchange, reducing the temperature of the positive electrolyte to a preset level. After heat exchange, the refrigerant is fed back into the reactor 24. The heat exchange system includes a heat exchange evaporator 11, a control valve 8, and a condenser 4. The outlet of the condenser 4 is connected to the inlet of the control valve 8, the outlet of the control valve 8 is connected to the first inlet of the heat exchange evaporator 11, and the first outlet of the heat exchange evaporator 11 is connected to the inlet of the condenser 4. A controller 9 is installed on the control valve 8, which is electrically connected to an auxiliary controller 27. The auxiliary controller 27 controls the opening of the control valve 8 by controlling the controller 9, thereby adjusting the refrigerant flow rate in the heat exchange system. A heat recovery system is connected to the condenser 4. The second outlet of the heat exchange evaporator 11 is connected to the positive electrode circulation system of the electrolyte, and the second inlet of the heat exchange evaporator 11 is connected to the positive electrode outlet of the electrolyte of the reactor 24. Within this system, the positive electrode electrolyte, after participating in the chemical reaction in the reactor 24, is input into the heat exchange evaporator 11 of the heat exchange system, where it exchanges heat energy with the refrigerant input into the condenser 4, causing the refrigerant to vaporize. The vaporized refrigerant is then input into the condenser 4 for further heat exchange, recovering heat energy for use by other thermal energy equipment. This achieves effective heat energy recovery from the flow battery and enables the use of vaporized refrigerant for power generation, improving the utilization rate of thermal energy. The vaporized refrigerant condenses into a liquid state in the condenser 4 and is reused, further improving energy utilization efficiency.

[0027] like Figure 1 As shown, the positive electrode circulation system includes a positive electrode storage tank 18 and a first circulation pump 23. The inlet of the positive electrode storage tank 18 is connected to the second outlet of the heat exchange evaporator 11, and the outlet of the positive electrode storage tank 18 is connected to the inlet of the first circulation pump 23. The outlet of the first circulation pump 23 is connected to the positive electrode inlet of the reactor 24. The cooperative use of the positive electrode storage tank 18 and the first circulation pump 23 ensures the stability of the temperature and flow rate of the positive electrode electrolyte.

[0028] like Figure 1As shown, the heat exchange evaporator 11 includes a heat exchanger and an evaporator. A first outlet and a first inlet are located on the heat exchanger, and a second inlet and a second outlet are located on the evaporator. In the heat exchange evaporator 11, the electrolyte and refrigerant undergo initial heat exchange through the heat exchanger, and the evaporator completes the phase change heat absorption of the refrigerant. Through the heat exchanger and the evaporator, the positive electrolyte can be prevented from directly contacting the compressor 10, which prevents contamination and improves safety. The above configuration can optimize efficiency. The heat exchanger initially heats the positive electrolyte, and then the evaporator deeply absorbs heat, which can avoid excessive load on a single device.

[0029] like Figure 1 As shown, a check valve 7 is connected between the outlet of the condenser 4 and the inlet of the control valve 8. The check valve 7 can prevent refrigerant from flowing back into the condenser 4, protecting the compressor 10 and preventing it from affecting the heat exchange of the system. A first flow limiting valve 12 and an expansion valve 13 are connected in series between the second inlet of the evaporator and the outlet of the control valve 8. The expansion valve 13 reduces the pressure and temperature of the refrigerant delivered to the first flow limiting valve 12, so that the refrigerant input to the evaporator is a low-temperature and low-pressure liquid. The first flow limiting valve 12 controls the flow rate of the refrigerant input to the evaporator, avoiding excessive or insufficient flow, which would lead to low heat exchange efficiency.

[0030] like Figure 1 As shown, a compressor 10 is installed between the second outlet of the evaporator and the inlet of the condenser 4. The compressor 10 compresses the low-temperature and low-pressure vaporized refrigerant, increasing the temperature and pressure of the vaporized refrigerant, and delivers it to the condenser 4 to further improve the energy recovery efficiency. A ventilator 6 and an exhaust fan 5 are installed between the compressor 10 and the inlet of the condenser 4. The ventilator 6 and the exhaust fan 5 dissipate heat in emergencies. If heat exchange is not timely, the vaporized refrigerant may experience ultra-high temperature or ultra-high pressure.

[0031] like Figure 1 As shown, a temperature sensor 22 and a second flow-limiting valve 21 are installed between the outlet of the positive electrode storage tank 18 and the inlet of the first circulation pump 23. The temperature sensor 22 acquires the temperature data of the positive electrode electrolyte input to the reactor stack 24. If the temperature data exceeds the preset temperature, the second flow-limiting valve 21 reduces the input flow rate. The temperature sensor 22 is electrically connected to an auxiliary controller 27. The auxiliary controller 27 is also electrically connected to an audible and visual alarm 20 installed on the positive electrode of the reactor stack 24. If the temperature of the positive electrode electrolyte exceeds the preset temperature data, the auxiliary controller 27 controls the audible and visual alarm 20 to issue a warning, so that the staff can inspect the system circuit and avoid serious accidents caused by untimely inspection.

[0032] like Figure 1As shown, the electrolyte negative electrode circulation system includes a negative electrode storage tank 17 and a second circulation pump 25. The inlet of the negative electrode storage tank 17 is connected to the electrolyte negative electrode outlet of the reactor 24, and the outlet of the negative electrode storage tank 17 is connected to the inlet of the second circulation pump 25. The outlet of the second circulation pump 25 is connected to the electrolyte negative electrode inlet of the reactor 24. The cooperative use of the negative electrode storage tank 17 and the second circulation pump 25 ensures the stability of the temperature and flow rate of the negative electrode electrolyte.

[0033] like Figure 1 As shown, a third flow limiting valve 26 is installed between the outlet of the negative electrode storage tank 17 and the inlet of the second circulation pump 25. The auxiliary controller 27 is also electrically connected to a concentration sensor 16 installed on the negative electrode of the reactor stack 24. The concentration sensor 16 acquires the concentration data of the negative electrode electrolyte on the negative electrode of the reactor stack 24. If the concentration is lower or higher than the preset concentration, the third flow limiting valve 26 is controlled to adjust the flow rate of the negative electrode electrolyte input to the negative electrode of the reactor stack 24, thereby ensuring that the volume ratio of the positive electrode electrolyte to the negative electrode electrolyte in the reactor stack 24 is kept within an appropriate range, and ensuring the stability of the chemical reaction in the reactor stack 24.

[0034] like Figure 1 As shown, the system also includes a preheating system, which includes a first preheater 15, a second preheater 19, and a preheating controller 14. The preheating controller 14 is electrically connected to the first preheater 15 and the second preheater 19. Simultaneously, the preheating controller 14 is also electrically connected to an auxiliary controller 27. When the temperature sensor 22 detects that the temperature is lower than the expected temperature, the first preheater 15 is positioned between the inlet of the negative electrode storage tank 17 and the negative electrode outlet of the electrolyte in the reactor 24, and the second preheater 19 is positioned between the second inlet of the heat exchange evaporator 11 and the positive electrode outlet of the electrolyte in the reactor 24. By controlling the preheating controller 14, the second preheater 19 is activated to preheat the positive electrode electrolyte. In low-temperature environments, the first preheater 15 is also controlled to heat the negative electrode electrolyte, allowing the electrolyte input to the reactor 24 to quickly reach the optimal reaction temperature in low-temperature environments. This avoids a decrease in ionic conductivity and an increase in polarization loss, significantly improving low-temperature performance and start-up efficiency.

[0035] like Figure 1As shown, the heat recovery system includes a heat storage tank 1, a heat exchanger 2, and a generator 3. The inlet of the heat storage tank 1 is directly connected to the outlet of the condenser 4, allowing some heat energy to be directly input into the heat storage tank 1 for storage and stable heat energy recovery. The heat exchanger 2 and the generator 3 are connected in series to form a heat energy loop branch, which is connected between the inlet of the heat storage tank 1 and the outlet of the condenser 4. The generator 3 is driven by the partially vaporized refrigeration unit in the condenser 4, converting low-grade waste heat into high-priced electrical energy and reducing the net energy consumption of the system. The heat exchanger 2 processes the waste heat from the generator 3, improving the system's effective recovery of heat generated by the flow battery.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A thermal energy system for a flow battery, characterized in that, It includes an electrolyte positive electrode circulation system connected to the positive electrode of the reactor (24) and an electrolyte negative electrode circulation system connected to the negative electrode; the electrolyte positive electrode circulation system is connected to a heat exchange system; The heat exchange system includes a heat exchange evaporator (11), a control valve (8), and a condenser (4); wherein the outlet of the condenser (4) is connected to the inlet of the control valve (8), the outlet of the control valve (8) is connected to the first inlet of the heat exchange evaporator (11), the first outlet of the heat exchange evaporator (11) is connected to the inlet of the condenser (4), the control valve (8) is electrically connected to an auxiliary controller (27), and a heat recovery system is connected to the condenser (4); The second outlet of the heat exchange evaporator (11) is connected to the electrolyte positive electrode circulation system, and the second inlet of the heat exchange evaporator (11) is connected to the electrolyte positive electrode outlet of the reactor (24).

2. The thermal energy system of a flow battery according to claim 1, characterized in that, The electrolyte positive electrode circulation system includes a positive electrode storage tank (18) and a first circulation pump (23). The inlet of the positive electrode storage tank (18) is connected to the second outlet of the heat exchange evaporator (11), the outlet of the positive electrode storage tank (18) is connected to the inlet of the first circulation pump (23), and the outlet of the first circulation pump (23) is connected to the electrolyte positive electrode inlet of the reactor (24).

3. The thermal energy system of a flow battery according to claim 2, characterized in that, The heat exchange evaporator (11) includes a heat exchanger and an evaporator, wherein the first outlet and the first inlet are disposed on the heat exchanger, and the second inlet and the second outlet are disposed on the evaporator.

4. The thermal energy system of a flow battery according to claim 3, characterized in that, A check valve (7) is connected between the outlet of the condenser (4) and the inlet of the control valve (8). A first flow limiting valve (12) and an expansion valve (13) are connected in series between the second inlet of the evaporator and the outlet of the control valve (8).

5. The thermal energy system of a flow battery according to claim 3, characterized in that, A compressor (10) is provided between the second outlet of the evaporator and the inlet of the condenser (4), and a ventilator (6) and an exhaust fan (5) are provided between the compressor (10) and the inlet of the condenser (4).

6. The thermal energy system of a flow battery according to claim 3, characterized in that, A temperature sensor (22) and a second flow limiting valve (21) are provided between the outlet of the positive electrode storage tank (18) and the inlet of the first circulation pump (23). The temperature sensor (22) is electrically connected to the auxiliary controller (27). The auxiliary controller (27) is also electrically connected to an audible and visual alarm (20) installed on the positive electrode of the reactor (24).

7. The thermal energy system of a flow battery according to claim 1, characterized in that, The electrolyte negative electrode circulation system includes a negative electrode storage tank (17) and a second circulation pump (25). The inlet of the negative electrode storage tank (17) is connected to the electrolyte negative electrode outlet of the reactor (24), and the outlet of the negative electrode storage tank (17) is connected to the inlet of the second circulation pump (25). The outlet of the second circulation pump (25) is connected to the electrolyte negative electrode inlet of the reactor (24).

8. The thermal energy system of a flow battery according to claim 7, characterized in that, A third flow limiting valve (26) is provided between the outlet of the negative electrode storage tank (17) and the inlet of the second circulation pump (25). The auxiliary controller (27) is also electrically connected to a concentration sensor (16) provided on the negative electrode of the reactor (24).

9. The thermal energy system of a flow battery according to claim 7, characterized in that, The system also includes a preheating system, which includes a first preheater (15), a second preheater (19) and a preheating controller (14), wherein the preheating controller (14) is electrically connected to the first preheater (15) and the second preheater (19). The first preheater (15) is located between the inlet of the negative electrode storage tank (17) and the negative electrode outlet of the electrolyte of the reactor (24), and the second preheater (19) is located between the second inlet of the heat exchange evaporator (11) and the positive electrode outlet of the electrolyte of the reactor (24).

10. The thermal energy system of a flow battery according to claim 1, characterized in that, The heat recovery system includes a heat storage tank (1), a heat exchanger (2), and a generator (3). The inlet of the heat storage tank (1) is directly connected to the outlet of the condenser (4). The heat exchanger (2) and the generator (3) are connected in series to form a heat energy loop branch, which is connected between the inlet of the heat storage tank (1) and the outlet of the condenser (4).

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