A new solar hybrid power generation system

Abstract

The application discloses a novel solar composite power generation system, which comprises a photovoltaic-thermal PV / T subsystem and a thermal regenerative electrochemical cycle TREC subsystem; the PV / T subsystem and the TREC subsystem jointly form a PV / T-TREC system, the PV / T-TREC system can utilize full-spectrum solar energy to generate power; the PV / T subsystem comprises photovoltaic cells, heat absorption plates and an insulation layer, and the photovoltaic cells, the heat absorption plates and the insulation layer are sequentially connected from top to bottom; the TREC subsystem comprises TREC cells. Compared with a conventional PV / T whose power generation efficiency is limited to the utilization of only short-wave light, the PV / T-TREC system can utilize full-spectrum solar energy to generate power, thereby improving the comprehensive power generation efficiency of solar energy. In view of a combination mode that is more easily thought of in the PV / T-TREC system, i.e. a combination mode in which a pipe type water flow heat exchange in the PV / T is used to supply TREC electrolyte, the application innovatively designs the TREC cells as a primary heat exchange of the heat exchange fluid in the PV / T. On the one hand, the device cost is greatly reduced; on the other hand, the primary heat exchange greatly reduces heat exchange loss compared with secondary heat exchange driven by water.

Description

Technical Field

[0001] This invention belongs to the field of solar energy utilization and electrochemical thermoelectric conversion, specifically a novel solar composite power generation system. Background Technology

[0002] With breakthroughs in technology and reductions in costs, abundant solar energy resources have become a core driving force for global energy technology transformation amidst a host of challenges, including abnormal climate warming and fossil fuel shortages.

[0003] The emergence and large-scale development of photovoltaic (PV) cell technology have led to the generation of electricity. It outputs electrical energy by receiving sunlight and exciting the flow of free electrons to form an electric current. However, limited by the bandgap characteristics of materials, PV cells can only utilize the short-wavelength portion of the solar spectrum, while long-wavelength light is lost as heat. Photovoltaic / Thermal (PV / T) technology, which utilizes the full spectrum of solar energy, adds a heat-absorbing plate to PV cells, enabling the utilization of long-wavelength light as heat, thus improving the overall efficiency of solar energy utilization. However, for electricity, a high-quality energy source, PV / T technology has not improved upon PV cells; a technological gap still exists in full-spectrum thermoelectric conversion. Summary of the Invention

[0004] To further improve solar power generation efficiency based on PV / T systems, this invention provides a novel solar hybrid power generation system. It proposes combining a thermally regenerative electrochemical cycle (TREC) technology—which uses thermal energy to drive electrochemical reactions and efficiently converts the chemical energy generated by these reactions into electrical energy—with PV / T. Specifically, it proposes a hybrid system combining TREC and PV / T (PV / T-TREC), which has inherent advantages in full-spectrum solar power generation efficiency. Therefore, while generating electricity, the photovoltaic and solar thermal systems absorb heat energy and deliver it as hot water to the thermally regenerative electrochemical cycle as its heat source, thereby achieving heat-to-electricity conversion, efficiently outputting additional electrical energy, and improving the overall heat-to-electricity conversion efficiency. Although using water as a medium for secondary heat exchange is a relatively easy technology to conceive for this hybrid system, the energy loss during the process greatly limits the further development and practical application of this hybrid system. In order to reduce the heat exchange loss of PV / T-TREC, this invention has made an innovative design to directly use the electrolyte of TREC battery to replace the heat exchange fluid of PV / T, thereby achieving primary heat exchange and further improving the power generation efficiency of solar energy.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A novel solar-powered composite system includes a photovoltaic / thermal (PV / T) subsystem and a thermal regeneration electrochemical cycle (TREC) subsystem. The PV / T and TREC subsystems together form a PV / T-TREC system, which can utilize the full spectrum of solar energy for power generation. The PV / T subsystem includes photovoltaic cells, a heat absorber, and an insulation layer, which are sequentially bonded together from top to bottom. The TREC subsystem includes a TREC cell, which consists of a positive electrode, a negative electrode, and a positive electrode electrode. The system consists of an electrolyte, a negative electrode electrolyte, and an ion exchange membrane. The photovoltaic cell faces upwards to receive sunlight. A thermally conductive adhesive is applied to the lower surface of the photovoltaic cell, which is then laid on the upper surface of the heat absorber to absorb the waste heat generated by the photovoltaic cell. The lower surface of the heat absorber is attached to the upper surface of the TREC cell to achieve primary heat exchange between the PV / T and TREC subsystems, reducing heat loss. An insulation layer is wrapped around the outer surface of the TREC cell by adhesive or mechanical fastening, and the upper surface of the insulation layer is attached to the exposed portion of the lower surface of the heat absorber to prevent heat loss from the back of the heat absorber.

[0007] The inner surface of the positive electrode of the TREC battery is immersed in the positive electrolyte, and the inner surface of the negative electrode is immersed in the negative electrolyte. The positive electrolyte and the negative electrolyte are separated by an ion exchange membrane.

[0008] The TREC battery also includes a battery casing, a first wire, a second wire, a load, and a power source. One end of the first wire is connected to the positive terminal of the battery, and one end of the second wire is connected to the negative terminal of the battery. When the TREC battery is discharging, the other ends of the first and second wires are connected to the load. When the battery is charging, the other ends of the first and second wires are connected to the power source.

[0009] The positive and negative electrolytes are used to absorb the heat energy generated by the photovoltaic thermal module, directly realizing a heat exchange of the TREC battery to obtain solar thermal energy and reduce heat transfer loss.

[0010] The photovoltaic cells are made of silicon-based or thin-film materials, and the heat absorption plates are made of copper, aluminum and composite materials with good heat transfer efficiency. The insulation layer is made of polyurethane foam or glass fiber.

[0011] The positive electrode of the battery uses a Prussian blue analogue as the main structure and carbon cloth as its substrate and current collector. The negative electrode of the battery uses copper or zinc as the main structure and the negative electrode itself as the current collector.

[0012] The positive electrode electrolyte is a high-concentration electrolyte that forms a redox couple with a large temperature coefficient with the positive electrode of the battery, and the negative electrode electrolyte is a high-concentration electrolyte that forms a redox couple with a large temperature coefficient with the negative electrode of the battery and has the opposite sign to the redox couple on the positive electrode side.

[0013] Based on the ion transport type and pH environment conditions of the TREC battery, an ion exchange membrane with high ion conductivity, good chemical and thermal stability, and sufficient mechanical strength is selected.

[0014] The battery casing uses an electrically insulating material with high thermal conductivity and electrochemical stability, thereby improving the efficiency of heat exchange between the positive and negative electrolytes in the PV / T-TREC and enhancing the overall energy efficiency of the PV / T-TREC in generating electricity from solar energy.

[0015] When the temperature coefficient of the TREC cell is negative, under illumination, the photovoltaic modules in the PV / T-TREC system are responsible for generating electricity to supply the power consumption side and the TREC cell. At the same time, the TREC cell absorbs heat to charge and store chemical energy at a relatively low potential. Under non-illumination conditions, the photovoltaic stops generating electricity, and the TREC subsystem releases the stored energy in the form of electrical energy at a relatively high potential to supply the power consumption side.

[0016] When the temperature coefficient of the TREC cell is positive, the TREC cell in the PV / T-TREC system is charged at a relatively low potential under non-sunlight conditions. Under sunlight conditions, the photovoltaic module is responsible for generating electricity and providing power. At the same time, the TREC cell absorbs heat and releases the energy stored at night at a relatively high potential to provide power.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) Compared with the traditional PV / T whose power generation efficiency is limited to only short-wavelength light waves, the PV / T-TREC system proposed in this application can utilize solar energy for power generation across the entire spectrum, thus improving the overall power generation efficiency of solar energy. Regarding the commonly conceivable combination of PV / T and TREC systems using tubular water flow heat exchange to supply TREC electrolyte, this invention innovatively designs TREC cells as the primary heat exchange fluid in the PV / T. On the one hand, this significantly reduces the cost of devices such as pipes and water tanks; on the other hand, primary heat exchange greatly reduces heat loss compared to water-driven secondary heat exchange, further improving the thermal-to-electric efficiency of TREC, thereby enhancing the overall solar power generation efficiency of the PV / T-TREC system. The absorption of heat by the TREC electrolyte balances the heat absorption of the PV panel, thus suppressing the impact of PV temperature rise on PV power generation and ensuring the electrical efficiency of the photovoltaic cells. From the traditional PV / T system to the PV / T-TREC system with primary electrolyte heat exchange designed in this invention, the solar power generation efficiency can be increased from 18% to 21%.

[0019] (2) The PV / T-TREC negative temperature coefficient system can realize the continuous power supply of the whole day by generating photovoltaic power during the day and storing TREC energy at night, and generating power from TREC at night. It can flexibly supplement the grid and enhance its resilience. In addition, the photovoltaic power generation supports the charging of TREC batteries, which facilitates the self-driven, portable PV / T-TREC low-cost and high-efficiency solar power generation system without the need for additional power input. The PV / T-TREC positive temperature coefficient system can realize the synergistic power generation of photovoltaic and TREC during the day, with strong power supply reliability and balance the grid during the high demand period during the day. In addition, the system charges TREC during the off-peak period of the grid at night, which significantly reduces costs.

[0020] (3) This system can replace daytime electricity consumption with its low cost advantage; in addition, it can flexibly match actual electricity consumption and economic needs by changing the TRA C battery material, making it versatile and highly adaptable. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the PV / T-TREC system for discharging TREC batteries according to the present invention;

[0022] Figure 2 This is a structural diagram of the PV / T-TREC system for charging TREC batteries according to the present invention;

[0023] Figure 3 This is a structural diagram of the TREC battery involved in the PV / T-TREC system of the present invention.

[0024] The correspondence between the labels and component names in the attached figures is as follows:

[0025] 1. Photovoltaic cell; 2. Absorber plate; 3. TREC cell; 3-1. Positive electrode; 3-2. Negative electrode; 3-3. Positive electrolyte; 3-4. Negative electrolyte; 3-5. Ion exchange membrane; 3-6. Battery casing; 4. Insulation layer; 5-1. First conductor; 5-2. Second conductor; 6-1. Load; 6-2. Power supply. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0029] See Figure 1-3 This is an overall structural diagram of the novel solar composite power generation system of the present invention. This application includes a photovoltaic / thermal (PV / T) subsystem and a thermal regeneration electrochemical cycle (TREC) subsystem. The PV / T subsystem and the TREC subsystem together constitute the PV / T-TREC system, which can utilize solar energy to generate electricity across the entire spectrum. The PV / T subsystem includes a photovoltaic cell 1, a heat absorber 2, and a heat insulation layer 4, which are sequentially attached and connected from top to bottom. The TREC subsystem includes a TREC battery 3, which consists of a positive electrode 3-1, a negative electrode 3-2, a positive electrolyte 3-3, a negative electrolyte 3-4, an ion exchange membrane 3-5, a battery casing 3-6, a first wire 5-1, a second wire 5-2, a load 6-1, and a power supply 6-2. One end of the first wire 5-1 is connected to the positive electrode 3-1, and one end of the second wire 5-2 is connected to the negative electrode 3-2.

[0030] The photovoltaic / thermal (PV / T) subsystem used in the above technology generates electricity and heat energy simultaneously based on the photovoltaic effect and heat collection effect: the incident sunlight excites electrons in the photovoltaic cell to jump from the valence band to the conduction band, forming free electrons and holes to generate current, thus realizing thermal power generation; the waste heat generated by sunlight irradiating the photovoltaic panel is utilized through heat exchange mechanisms, such as cooling fluids and cooling air; the thermal regeneration electrochemical cycle (TREC) subsystem employs a highly efficient energy conversion technology. Based on the temperature dependence of electrode potential, characterized by a temperature coefficient, this thermoelectric effect, matched with a suitable thermodynamic cycle, utilizes the high and low temperature difference to drive the formation of a potential difference between charging and discharging, thereby realizing the conversion of heat energy into electrical energy. According to the characteristics of the redox reaction entropy change, the temperature coefficient value of the TREC battery is positive or negative, corresponding to high-temperature discharge, low-temperature charging, and high-temperature charging, low-temperature discharge conditions, respectively.

[0031] See Figure 1This is a schematic diagram of the battery discharge structure in the PV / T-TREC system of the present invention. In this application, the light-receiving surface of the photovoltaic cell 1 faces upward to receive sunlight. The lower surface of the photovoltaic cell 1 is coated with thermally conductive adhesive and laid on the upper surface of the heat absorber plate 2 to absorb the waste heat generated by the photovoltaic cell 1. The lower surface of the heat absorber plate 2 is attached to the upper surface of the TREC cell 3 to realize a single heat exchange between the PV / T and TREC subsystems to reduce heat loss. The insulation layer 4 is wrapped around the outer surface of the TREC cell 3 by bonding or mechanical fastening, and the upper surface of the insulation layer 4 is attached to the exposed part of the lower surface of the heat absorber plate 2 to prevent heat loss from the back of the heat absorber plate 2. When the TREC cell 3 discharges, the other ends of the first wire 5-1 and the second wire 5-2 are connected to an external load 6-1.

[0032] See Figure 2 This is a schematic diagram of the battery charging structure in the PV / T-TREC system of the present invention. In this application, the inner surface of the positive electrode 3-1 of the TREC battery 3 is immersed in the positive electrolyte 3-3, and the inner surface of the negative electrode 3-2 is immersed in the negative electrolyte 3-4. The positive electrolyte 3-3 and the negative electrolyte 3-4 are separated by an ion exchange membrane 3-5. During battery charging, the other end of the first wire 5-1 and the second wire 5-2 is connected to an external power supply 6-2. The positive electrolyte 3-3 and the negative electrolyte 3-4 are used to absorb the heat energy generated by the photovoltaic thermal module. The electrolyte replaces the heat exchange fluids such as water and air used in traditional photovoltaic thermal systems, and replaces the heat exchange fluids such as water used to heat the TREC battery in the easily conceivable combination of PV / T-TREC systems. It directly realizes a single heat exchange of the TREC battery 3 to obtain solar thermal energy and reduce heat transfer loss.

[0033] See Figure 1-3The structural diagram of the hybrid power generation system is shown in this application. To further enhance the working efficiency of the hybrid power generation system, certain selections are made in the raw materials of the devices participating in the power generation system. Specifically: the photovoltaic cell 1 is made of silicon-based or thin-film materials, and the heat absorber 2 is made of copper with high thermal conductivity, lightweight and low-cost aluminum, or a composite material that balances heat transfer efficiency, cost, and weight. The insulation layer 4 is made of polyurethane foam or glass fiber with low thermal conductivity and good thermal stability. The positive electrode 3-1 of the battery uses Prussian blue analogues, which are currently common and have superior performance in the TREC field, as the main structure, with carbon cloth as its substrate and current collector. The negative electrode 3-2 of the battery uses copper or zinc with high specific capacity and good conductivity as the main structure, with the negative electrode 3-2 itself as the current collector. The positive electrode electrolyte 3-3 is selected to form a large temperature coefficient with the positive electrode 3-1. The high-concentration electrolyte with multiple redox couples is used in the negative electrode electrolyte 3-4, which forms a redox couple with a large temperature coefficient and opposite sign to the positive electrode side. The ion exchange membrane 3-5 is selected according to the ion transport type and pH environment conditions of the TREC battery 3, with corresponding high ionic conductivity, good chemical and thermal stability, and sufficient mechanical strength, such as Nafion membrane, or anion exchange membrane AEM, such as DSV membrane. The battery casing 3-6 uses an electrically insulating material with high thermal conductivity and electrochemical stability, such as a metal casing with an insulating coating or a similar aluminum casing with a ceramic coating, thereby improving the efficiency of heat exchange between the positive electrode electrolyte 3-3 and the negative electrode electrolyte 3-4 in the PV / T-TREC and improving the overall energy efficiency of the PV / T-TREC in generating electricity using solar energy.

[0034] It should be noted that the materials used in TREC Battery 3 should be selected based on the principle of high temperature coefficient and good stability of the whole cell.

[0035] In summary, to further improve solar power generation efficiency based on PV / T systems, this invention provides a novel solar composite power generation system. It proposes combining TREC (Thermal Regeneration Electrochemical Cycle) technology—which uses thermal energy to drive electrochemical reactions in the field of low-grade thermal energy utilization and efficiently converts the chemical energy generated by these reactions into electrical energy—with PV / T. To reduce heat exchange losses in the PV / T-TREC system, this invention innovatively designs a method where the electrolyte of the TREC battery is directly used to replace the heat exchange fluid in the PV / T system, achieving primary heat exchange and further improving solar power generation efficiency. When the system is operating, if the temperature coefficient of TREC battery 3 is negative, under illumination, the photovoltaic modules in the PV / T-TREC system are responsible for generating electricity to supply the power consumption side and TREC battery 3. Simultaneously, TREC battery 3 absorbs heat to charge and store chemical energy at a relatively low potential. Under non-illumination conditions, the photovoltaic system stops generating electricity, and the TREC subsystem releases the stored energy as electrical energy at a relatively high potential to supply the power consumption side. If the temperature coefficient of TREC battery 3 is positive, under non-illumination conditions, the TREC battery in the PV / T-TREC system... C-cell 3 is charged at a relatively low potential. Under sunlight, the photovoltaic module is responsible for generating electricity. At the same time, TREC cell 3 absorbs heat and releases the stored energy at night at a relatively high potential to provide electricity.

[0036] To further illustrate the working process of the system in this application, the following embodiments are provided for detailed process description.

[0037] Example 1: TREC battery with negative temperature coefficient

[0038] In a TREC battery: the positive electrode can be copper ferricyanide coated on carbon cloth, and the positive electrode electrolyte can be 6M sodium nitrate; the ion exchange membrane can be DSV; the negative electrode can be a copper sheet, and the negative electrode electrolyte can be 3M copper nitrate; the temperature coefficient of the redox couple on the positive electrode side (copper ferricyanide / sodium ions) is -0.36mV / K, and the temperature coefficient of the redox couple on the negative electrode side (copper / copper ions) is 0.83mV / K; therefore, the temperature coefficient of the entire cell is -1.19mV / K.

[0039] During periods of ample sunlight, solar radiation strikes the PV / T subsystem. A portion is directly used for photovoltaic (PV) cell power generation, while the remaining heat is absorbed by the absorber and transferred to the electrolyte of the adjacent TREC cell via primary heat exchange, causing it to heat up and inducing a decrease in its potential as temperature rises. During this process, the PV module charges and stores chemical energy in the TREC cell until the heat is depleted. Furthermore, the heat absorbed by the TREC cell's electrolyte balances the heat simultaneously received by the PV / T from the external environment, suppressing the temperature rise of the PV cell and ensuring its electrical efficiency. Ultimately, this achieves continuous power generation from the PV module during daytime hours, while the TREC cell efficiently stores energy, thus fully utilizing solar energy resources for power generation.

[0040] During the night when there is a lack of heat sources, the ambient temperature gradually decreases, and the TREC battery is passively cooled through the PV panel side, causing its potential to rise. During this process, the TREC battery discharges, releasing the chemical energy stored as heat during the day at a higher potential, thus achieving efficient thermal power generation driven by the diurnal temperature difference. At night, this system overcomes the problem of power generation interruption in pure PV / T systems due to the lack of solar radiation, achieving continuous power generation throughout the day.

[0041] The PV / T-TREC system enables photovoltaic power generation during the day while TREC stores energy, and TREC generates electricity at night, providing a continuous power supply throughout the day. This can flexibly supplement the grid and enhance its resilience. In addition, photovoltaic power generation supports TREC battery charging, which facilitates the creation of a self-powered, portable PV / T-TREC system that requires no additional power input. This is a low-cost and high-efficiency solar power generation system.

[0042] Example 2: TREC battery with positive temperature coefficient

[0043] In TREC batteries: the positive electrode can be lithium manganese oxide coated on carbon cloth; a membrane-free system is used; the mixed electrolyte consists of 3M lithium nitrate and 1M potassium nitrate; the negative electrode can be copper ferricyanide coated on carbon cloth; the temperature coefficient of the redox couple on the positive electrode side (lithium manganese oxide / lithium ion) is 0.617 mV / K, and the temperature coefficient of the redox couple on the negative electrode side (copper ferricyanide / potassium ion) is -0.444 mV / K; therefore, the temperature coefficient of the entire cell is 1.061 mV / K.

[0044] During the night when there is no heat source, the ambient temperature gradually decreases, and the TREC battery is passively cooled by the PV plate side, and its potential decreases accordingly; during this process, the TREC battery is charged during the off-peak period of the power grid to store chemical energy.

[0045] During periods of abundant sunlight, solar radiation strikes the PV / T subsystem. A portion of this radiation is directly used for photovoltaic (PV) cell power generation, while the remaining heat is absorbed by the absorber and transferred to the electrolyte of the TREC cell adjacent to it via primary heat exchange, causing it to heat up and inducing its potential to rise with increasing temperature. During this process, the cell discharges, releasing the chemical energy stored overnight at a higher potential until the heat is exhausted. Furthermore, the TREC cell balances the heat absorbed by the electrolyte with the heat simultaneously received by the PV / T from the outside environment, suppressing the temperature rise of the PV cell and ensuring its electrical efficiency. The PV / T-TREC system enables PV and TREC to generate electricity collaboratively during the day, providing high power supply reliability and balancing the grid during peak daytime demand periods. In addition, the system charges the TREC during off-peak hours at night, significantly reducing costs.

[0046] As can be seen from the above embodiments, after completing these processes, the PV / T-TREC system can achieve high-efficiency full-spectrum solar power generation for various application scenarios; from the traditional PV / T system to the PV / T-TREC system with single-stage electrolyte heat exchange proposed in this invention, the power generation efficiency can be increased from 18% to 21%.

[0047] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A novel solar hybrid power generation system, comprising a photovoltaic-thermal (PV / T) subsystem and a thermal regenerative electrochemical cycle (TREC) subsystem, the PV / T subsystem and the TREC subsystem together forming a PV / T-TREC system, the PV / T-TREC system capable of full spectrum utilization of solar energy for power generation; the PV / T subsystem comprising a photovoltaic cell (1), a heat absorption plate (2), and a thermal insulation layer (4), and the photovoltaic cell (1), the heat absorption plate (2), and the thermal insulation layer (4) being sequentially connected from top to bottom; the TREC subsystem comprising a TREC cell (3), the TREC cell (3) being composed of a cell anode (3-1), a cell cathode (3-2), an anode electrolyte (3-3), a cathode electrolyte (3-4), and an ion exchange membrane (3-5); characterized in that the photovoltaic cell (1) having a light-receiving surface facing upward to receive light; the lower surface of the photovoltaic cell (1) being coated with a heat-conducting adhesive to be laid on the upper surface of the heat absorption plate (2) for absorbing waste heat generated by the photovoltaic cell (1); the lower surface of the heat absorption plate (2) being attached to the upper surface of the TREC cell (3) to realize one-time heat exchange between the PV / T and TREC subsystems and reduce heat loss; the thermal insulation layer (4) being wrapped around the outer surface of the TREC cell (3) by bonding or mechanical fastening, and the upper surface of the thermal insulation layer (4) being attached to the exposed part of the lower surface of the heat absorption plate (2) to prevent heat loss from the back of the heat absorption plate (2), the inner surface of the cell anode (3-1) being soaked in the anode electrolyte (3-3), the inner surface of the cell cathode (3-2) being soaked in the cathode electrolyte (3-4), and the anode electrolyte (3-3) and the cathode electrolyte (3-4) being separated by the ion exchange membrane (3-5); the anode electrolyte (3-3) being a high-concentration electrolyte forming a large-temperature-coefficient redox couple with the cell anode (3-1), and the cathode electrolyte (3-4) being a high-concentration electrolyte forming a large-temperature-coefficient redox couple with the cell cathode (3-2) and having a sign opposite to that of the anode side; when the temperature coefficient of the TREC cell (3) is negative, the photovoltaic assembly in the PV / T-TREC system is responsible for power generation to supply the TREC cell (3) under light conditions, and the TREC cell (3) absorbs heat to charge at a relatively low potential to store chemical energy; when there is no light, the photovoltaic assembly stops generating electricity, and the TREC subsystem releases the stored energy in the form of electrical energy at a relatively high potential to supply the power consumption side; when the temperature coefficient of the TREC cell (3) is positive, the TREC cell (3) charges at a relatively low potential in the PV / T-TREC system under non-light conditions, and the photovoltaic assembly is responsible for power generation to provide electrical energy under light conditions, while the TREC cell (3) absorbs heat to release the stored energy at a relatively high potential to provide electrical energy at night; the heat absorption plate (2) being used for absorbing waste heat generated by the photovoltaic cell (1) and actively capturing wide-spectrum solar energy that penetrates the photovoltaic cell (1) or is not absorbed by the photovoltaic cell (1). The TREC battery (3) can realize deep energy conversion by electrochemical cycle, adapt to complex operation strategy under different light conditions, and be configured to realize different day-night operation strategies according to its preset temperature coefficient sign.

2. The novel solar hybrid power generation system as claimed in claim 1, wherein: The TREC battery (3) further comprises a battery shell (3-6), a first wire (5-1), a second wire (5-2), a load (6-1), and a power supply (6-2), wherein one end of the first wire (5-1) is connected to the positive electrode (3-1), one end of the second wire (5-2) is connected to the negative electrode (3-2), when the TREC battery (3) discharges, the other end of the first wire (5-1) and the second wire (5-2) are commonly connected with the load (6-1), and when the battery charges, the other end of the first wire (5-1) and the second wire (5-2) are commonly connected with the power supply (6-2).

3. The novel solar hybrid power generation system as claimed in claim 1, wherein: The positive electrolyte (3-3) and the negative electrolyte (3-4) are used to absorb the heat generated by the photovoltaic-thermal module, directly realize the first heat exchange of the TREC battery (3) to obtain solar photothermal heat reduction heat loss.

4. The novel solar hybrid power generation system as claimed in claim 1, wherein: The photovoltaic cell (1) is made of silicon-based or thin-film materials, and the heat absorption plate (2) is made of copper, aluminum and composite materials with good heat transfer efficiency, and the insulation layer (4) is made of polyurethane foam or glass fiber as raw material.

5. The novel solar hybrid power generation system as claimed in claim 1, wherein: The battery positive electrode (3-1) selects Prussian blue analog as the main structure, and carbon cloth as the substrate and current collector, and the battery negative electrode (3-2) selects copper or zinc as the main structure, and the battery negative electrode (3-2) itself as the current collector.

6. The novel solar hybrid power generation system as claimed in claim 1, wherein: According to the ion transport type and pH environment condition of the TREC battery (3), the corresponding ion exchange membrane (3-5) is selected.

7. The novel solar hybrid power generation system as claimed in claim 2, wherein: The battery shell (3-6) uses high thermal conductivity and electrochemically stable electrically insulating material, thereby improving the efficiency of the PV / T-TREC using the positive electrolyte (3-3) and the negative electrolyte (3-4) for the first heat exchange, and improving the comprehensive energy efficiency of the PV / T-TREC using solar power generation.

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