36 results about "Cryogenic energy storage" patented technology

The invention provides a stepped energy storage system which comprises a power cycle unit, a high-temperature energy storage unit, a low-temperature energy storage unit, a high-temperature heater, a low-temperature heater and a control unit and is divided into two operation stages including an energy storage mode and an energy release mode. According to the system, the low-temperature energy storage system and the high-temperature energy storage system are combined to achieve stepped energy storage, and through cooperation with the intelligent control unit and the power circulation unit, the system can be flexibly switched between an energy storage mode and an energy release mode, so that the power requirements under different working conditions are accurately responded, and the power supply efficiency is improved. And the # imgabs0 # loss of the high-grade heat energy in the transfer process is reduced.

The invention belongs to the technical field of building energy management and energy storage, and provides a building load transfer system and method based on graded phase change heat storage, in an energy storage stage, high-temperature hot water prepared by an electric heating device enters a graded phase change energy storage subsystem through a pipeline; in the heat supply stage, building return water is heated by the high-temperature energy storage unit and the low-temperature energy storage unit and then fed into the heat supply tail end; in the refrigeration stage, hot water output by the high-temperature energy storage unit drives the ammonia water absorption refrigerator to generate chilled water, then cooling is conducted through the heat supply tail end, and the high-temperature energy storage unit and the low-temperature energy storage unit are innovatively arranged in series; during energy storage, hot water sequentially releases heat according to the temperature from high to low, and return water sequentially absorbs heat according to the temperature from low to high during energy release and heat supply, so that temperature alignment and gradient utilization of heat energy are realized, loss in the heat transfer process is greatly reduced, and the overall energy utilization efficiency is remarkably higher than that of a traditional single-stage heat storage system; and the application of the phase change energy storage technology in building energy storage and energy utilization is promoted.

The utility model relates to a vehicle low-temperature energy storage management system which is in communication connection with an external temperature sensor of a vehicle and comprises a heating device, an electronic water pump, a first flow control valve, an electric control three-way valve, an engine air inlet air filter and an engine. The electronic water pump is connected with the first flow control valve, the first flow control valve is connected with an inlet of the electric control three-way valve and connected with an air inlet of the engine air inlet air filter through a first outlet of the electric control three-way valve, and an air outlet of the engine air inlet air filter is connected with a water jacket water inlet of an engine to form an air inlet system heating loop. A second outlet of the electric control three-way valve is connected with a water jacket water inlet of the engine, a water jacket water outlet of the engine is connected with a first water inlet of the heating device to form an engine heat engine heating loop, heat is provided for the engine and an engine air inlet air filter, the engine and the engine air inlet air filter are heated, and then a vehicle is started rapidly and timely.

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

A method for exhaust aftertreatment of an internal combustion engine (10) with an exhaust system (20) in which a NOx storage catalyst (28) with a low-temperature storage component (48) made of cerium oxide and a high-temperature storage component (52) made of barium carbonate as well as an SCR catalyst (34) and / or particulate filter (30) with an SCR coating (32) arranged downstream of the NOx storage catalyst (28) in the flow direction of an exhaust gas of the internal combustion engine (10), comprising the following steps: - Modeling the loading state of the NOx storage catalyst (28), wherein - the charging of the low-temperature storage component (48) is determined by a first model for the charging of the low-temperature storage component (48), and - the loading of the high-temperature storage component (52) is determined by a second model for the loading of the high-temperature storage component (52), - Regenerating the NOx storage catalyst (28) by introducing unburned hydrocarbons into the exhaust system (20) of the combustion engine (10) when the high-temperature storage component (48) has reached a defined loading level and the SCR catalyst (34) or the particulate filter (30) with the SCR coating (32) has an operating temperature at which selective catalytic reduction of nitrogen oxides is possible, wherein - depending on whether the SCR catalyst (34) or the particulate filter (30) with the SCR coating (32) has an operating temperature at which selective catalytic reduction of nitrogen oxides is possible, at least two threshold values ​​are used, wherein - a first threshold value is provided at which a regeneration of the NOx storage catalyst (28) is carried out when the SCR catalyst (34) or the particulate filter (30) with the SCR coating (32) has reached its operating temperature and wherein - a second threshold is provided at which regeneration of the NOx storage catalyst (28) takes place independently of the temperature of the SCR catalyst (34) or the particulate filter (30) with SCR coating (32).

The utility model discloses a kind of based on liquid air energy storage's cogeneration unit start-stop peak shaving system, including the coal-fired generating unit for producing electric energy, the electric energy of the coal-fired generating unit for consumption is changed into heat and liquid air storage unit and the civil heating unit for carrying out external heating using the heating extraction steam provided by the coal-fired generating unit and the surplus compressed heat provided by liquid air energy storage unit, the high-pressure equipment of liquid air energy storage unit is connected at the power generation end of the coal-fired generating unit, and the civil heating unit is connected with liquid air energy storage unit and the coal-fired generating unit respectively.The utility model is based on guaranteeing the maximum heating load of external network of cogeneration unit, to configure minimum capacity liquid air energy storage system to realize start-stop peak shaving, both can guarantee heating, and can realize start-stop peak shaving function, simultaneously with minimum capacity configuration, reduce system redundancy, reduce initial investment.

The utility model provides a liquid nitrogen and liquid neon combined cold storage system applied to liquid hydrogen energy storage and a cold storage method, and particularly relates to the technical field of low-temperature energy storage, the liquid nitrogen and liquid neon combined cold storage system applied to liquid hydrogen energy storage comprises a cold storage unit, the cold storage unit comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, when the hydrogen is liquefied again, the high-pressure liquid neon, the normal-pressure liquid neon and the normal-pressure liquid nitrogen of the cold storage unit are used for providing pre-cooling cold for the hydrogen, the high-pressure liquid neon, the normal-pressure liquid neon and the normal-pressure liquid nitrogen of the cold storage unit are used as cold storage working media, the high-pressure liquid neon, the normal-pressure liquid neon and the normal-pressure liquid nitrogen of the cold storage unit are used for providing pre-cooling cold for the hydrogen when the hydrogen is liquefied again. And gradient heat exchange is used for cold release and cold storage, so that a cold release temperature area of liquid hydrogen can be matched to the maximum extent, high-quality cold energy of 27K, 40K and 77K low-temperature areas is recycled, the heat exchange temperature difference is reduced, and the low-temperature high-quality cold energy recycling rate is increased.

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

The invention provides a modularized cold storage system and method capable of monitoring a thermocline, relates to the technical field of low-temperature energy storage, and solves the problems that a low-temperature storage tank cannot monitor distribution of the thermocline in the tank, and the low-temperature storage tank cannot realize modularized design to meet various cold energy application requirements. According to the invention, the first-stage cold storage units composed of the second-stage cold storage units and the monitoring units are arranged, and the parallel path combination of the plurality of first-stage cold storage units and the main pipeline is realized by controlling the opening and closing of the bypass pipeline switch valves so as to adapt to different cold energy requirements; and meanwhile, a thermocline temperature distribution formula is corrected in real time by using data acquired by a multidirectional temperature sensor in the monitoring unit. Various cold energy requirements are met through the modular assembly, the monitoring unit is combined with the thermocline temperature distribution formula to monitor thermocline temperature field distribution in the low-temperature storage tank in real time, visualization of the temperature field in the storage tank in the cold storage / cold release process is achieved, meanwhile, the cold storage / cold release efficiency and the operation stability are improved, and the energy consumption and the site adaptation threshold are reduced.

The present application relates to the technical field of cable, and discloses a brittle prevention high-elasticity low-temperature-resistant energy storage system cable, aiming to solve the problems of low-temperature brittle prevention of the protective sleeve of traditional integrated cable, stress superposition and easy fracture of the bending part, the cable comprises a conductor and a cable protective layer, the protective layer is formed by interval arrangement of a first supporting assembly and a flexible assembly, the flexible assembly is coaxially fixed with a second supporting assembly outside, the second supporting assembly is in clearance fit with the first supporting assembly, when the cable is bent, the adjacent first supporting assemblies extrude the flexible assembly, and the overall bending is realized through the deformation of the flexible assembly, meanwhile, the first and second supporting assemblies can limit the bending amplitude of a single position, and the deformation is evenly distributed to stress by the multiple flexible assemblies, the scheme realizes the complement of pressure resistance, wear resistance, low-temperature flexibility, can disperse stress, reduce the risk of low-temperature brittle fracture, and guarantee the structural integrity and service life of the cable in harsh environment.

The invention relates to the technical field of cables, discloses an anti-embrittlement high-elasticity low-temperature-resistant cable for an energy storage system, and aims at solving the problems that a traditional integrated cable protection sleeve is prone to embrittlement at low temperature and prone to breakage due to stress superposition of a bending part. The protection layer is formed by arranging first supporting assemblies and flexible assemblies at intervals, second supporting assemblies are coaxially and fixedly connected outside the flexible assemblies, the second supporting assemblies and the first supporting assemblies are in clearance fit, when the cable is bent, the adjacent first supporting assemblies extrude the flexible assemblies, and overall bending is achieved through deformation of the flexible assemblies; meanwhile, the first supporting assembly and the second supporting assembly are matched so that the bending amplitude of a single position can be limited, the stress of deformation can be equally divided by the multiple flexible assemblies, the scheme achieves complementation of compression resistance, abrasion resistance and low-temperature flexibility, stress can be dispersed, the low-temperature brittle failure risk can be reduced, and the structural integrity and the service life of the cable in a severe environment are guaranteed.

The present invention discloses a deep cryogenic energy storage and oxy-fuel combustion carbon capture system for compressed air in a thermal power plant, which includes a low-pressure compressor, a high-pressure compressor, a solid particle heat storage system and a molten rock heat storage system. The low-pressure compressor and the high-pressure compressor are driven by an electric motor or a steam turbine. When the power consumption load of the power grid is small or the power plant has surplus electricity, the surplus electric energy drives the low-pressure compressor and the high-pressure compressor to compress the air inhaled from the atmosphere. Compression causes the air temperature to rise, and the heat generated during the compression process is stored through the molten rock heat storage system and the solid particle heat storage system. The present invention solves the problems of low efficiency of existing compressed air energy storage and large loss of exhaust residual energy, effectively utilizes the internal energy of the exhaust gas, increases the concentration of carbon dioxide in the exhaust gas, and effectively reduces the operating cost of carbon capture.

The application discloses a multi-supply system and method integrating Carnot cell energy storage and liquid hydrogen cold energy, comprising a vapor compression refrigeration cycle charging system, a Rankine cycle discharging system, a low-temperature energy storage system, a high-temperature energy storage system, a liquid hydrogen cold energy utilization system, a fuel cell waste heat utilization system and a liquid hydrogen pipeline; the charging system comprises a first compressor, a first condenser, a second compressor, a second condenser, a first throttling valve and a first evaporator which are sequentially connected in a circulation mode; the high-temperature energy storage system is in heat exchange with the discharging system through a second evaporator and a third evaporator; the low-temperature energy storage system is in heat exchange with the charging and discharging systems through a first evaporator and a third condenser respectively; and the liquid hydrogen cold energy utilization system realizes a liquid hydrogen gasification cold energy power generation process. The application utilizes liquid hydrogen cold energy and fuel cell waste heat to construct a high-efficiency comprehensive energy system.

The invention discloses a novel energy-storage 18-DEG C phase change material and a preparation method thereof, and belongs to the technical field of novel phase change materials. The material is prepared from a modified anhydrous calcium chloride-magnesium nitrate hexahydrate compound, a phase change temperature micro-adjusting agent, nano modified ammonium carbonate, a sodium silicate reinforcing agent, a polymer network structure thickening agent, graphene oxide nanosheets, a low-temperature stabilizer and the like. Stable phase change and high latent heat energy storage capacity near-18 DEG C are achieved, meanwhile, the material has excellent stability and durability and is suitable for various low-temperature energy storage applications, the preparation method is simple and efficient, the steps of ultrasonic dispersion, high-speed shearing, microwave treatment, secondary ultrasonic treatment and the like are adopted, and uniform dispersion and rapid curing of the material are achieved; the material also has good environmental protection performance and sustainability, and is widely applied to a freezer, a freezer car and other places needing cold storage.

The present invention specifically relates to a sodium-cooled fast reactor (SFR) power-industrial high-temperature steam peak-shaving cogeneration system, comprising a sodium-cooled fast reactor (SFR), a first pump, a sodium heat exchanger, a high-temperature energy storage tank, a low-temperature energy storage tank, a second pump, a third pump, a water heat exchanger, a feed water tank, a steam turbine, a power grid, and an electrically heated superheater. The SFR is immersed in an intermediate heat exchanger. The SFR is connected to the tube side of the intermediate heat exchanger, forming a primary circuit. The shell side of the intermediate exchanger, the tube side of the sodium heat exchanger, and the first pump together form a secondary circuit. The shell side of the sodium heat exchanger, the low-temperature energy storage tank, the high-temperature energy storage tank, the second pump, the third pump, and the tube side of the water heat exchanger together form a tertiary circuit. The shell side outlet of the water heat exchanger, the steam turbine, and the electrically heated superheater together form side A of the fourth circuit. The SFR power-industrial high-temperature steam peak-shaving cogeneration system of the present invention enables the rapid switching of the SFR from power grid peak-shaving to high-temperature industrial steam production mode, while simultaneously improving the safety and economic efficiency of the SFR.

The invention provides an energy recovery subsystem (10) for a cryogenic energy storage system (1), comprising: an evaporator (14); a first heat exchanger (21) for transferring thermal energy from the heat transfer fluid (6) to the working fluid (5); one or more expansion stages (30) for extracting work from the working fluid (5); a regenerator (40) for transferring thermal energy from the working fluid (5) to the working fluid (5); a first conduit arrangement (100) for conveying a working fluid (5); a second conduit arrangement (200) connectable to the thermal energy storage device (TESD) (3) and to the first heat exchanger (21) for conveying a heat transfer fluid (6); the first piping arrangement (100) sequentially connects the evaporator (14), the regenerator (40), the first heat exchanger (21), and reconnects the regenerator (40) and the one or more expansion stages (30).

A power recovery sub-system for a cryogenic energy storage system, the sub-system comprising: a first and a second thermal energy storage device (TESD); a first, a second and a fourth heat exchanger (HEX); a first, a second and a fourth expansion stage; a first arrangement of conduits, having an upstream end and a downstream end, and configured to pass a working fluid through the first HEX, the first expansion stage, the second HEX, and the second expansion stage; a second arrangement of conduits configured to pass a first heat transfer fluid from the first TESD, through the first and the second HEX; and a third arrangement of conduits configured to pass a second heat transfer fluid from the second TESD, through the fourth HEX, wherein the first arrangement of conduits is configured to pass the working fluid through the fourth HEX and the fourth expansion stage.

A gas heat supplement and heat storage power generation system comprises a low-temperature energy storage system, a high-temperature energy storage system, a molten salt energy storage device, a counterflow heat exchanger, a compressor, an expander, a generator, a boiler combustion heating system and connecting pipelines therebetween; the boiler combustion heating system comprises a combustion chamber and a boiler heating system in communication with the combustion chamber; the boiler heating system mainly comprises a heating module, and a heat absorption pipeline is arranged in the heating module; the expander and the heat absorption pipeline are connected in series and are connected in parallel with the compressor branch between one end of a steam passage of the counterflow heat exchanger and a port A of the low-temperature energy storage system; the other end of the steam passage of the counterflow heat exchanger is in communication with a port B of the high-temperature energy storage system; and both ends of a molten salt passage of the counterflow heat exchanger are in communication with the molten salt energy storage device. The design of the boiler heating system is added, the power generation efficiency is improved, and the commercial implementation is easy.

The application provides a control method for improving the steam temperature control effect of a coal-fired unit by coupling a medium-low temperature energy storage system; a load cooperative matching control method is designed, so that the medium-low temperature energy storage system and a boiler-turbine coordination system of the coal-fired unit jointly bear the whole unit load; in the process of load reduction, the work amount of high-pressure cylinder exhaust steam is obtained by an equivalent enthalpy drop method, the load instruction of the medium-low temperature energy storage system is calculated, the load instruction of the boiler-turbine coordination system of the coal-fired unit is obtained by using parameters such as the originally set load change rate, the initial load and the target load of the coal-fired unit, and the reheated steam temperature regulation mode is corrected; in the process of load increase, the load instruction of the medium-low temperature energy storage system is obtained by the energy storage capacity of the medium-low temperature system, the load instruction of the boiler-turbine coordination system of the coal-fired unit is obtained by using parameters such as the originally set load change rate, the initial load and the target load of the coal-fired unit, the load change pressure of the coal-fired unit is relieved, the parameter fluctuation range of the coal-fired unit is reduced, and the load change performance of the coal-fired unit is improved.

The invention provides a flue gas dust removal and waste heat recovery system. The flue gas dust removal and waste heat recovery system comprises a combustion settling chamber, a Carnot cell device and a dust remover which are sequentially arranged in the flue gas flowing direction; the Carnot battery device comprises a heat exchanger, a charging unit, an energy storage unit and a discharging unit; the heat exchanger is arranged on a pipeline between the combustion settling chamber and the dust remover; the charging unit is connected with the heat exchanger; the energy storage unit is connected with the charging unit and comprises a high-temperature energy storage module and a low-temperature energy storage module; the discharging unit is connected with the energy storage unit. The charging unit and the discharging unit are connected with a power grid. Wherein when the power grid is in a low load state, the charging unit can store heat transferred to the charging unit by the heat exchanger into the high-temperature energy storage module by utilizing redundant power; when the power grid is in a high load state, the discharge unit can use heat stored in the high-temperature energy storage module for power generation and supply to the power grid. The problem that an existing electric furnace dust removal flue gas cooling system does not recover flue gas waste heat or recovery is incomplete can be solved.

The invention discloses a sodium ion battery capacity recovery method and device, a medium and a sodium ion battery, and relates to the technical field of batteries. In the scheme, a capacity recovery operation is introduced in a cyclic charge-discharge process under a low-temperature condition, that is, the battery is discharged to a discharge cut-off voltage, and then is charged to a charge cut-off voltage by adopting a pulse charging mode, so that inactive components such as a metal sodium coating and dendritic crystals generated on the surface of a negative electrode in a long-cycle process are re-excited to be in an ionic state; therefore, the polarization effect and irreversible capacity loss under the low-temperature condition are relieved, the energy density is recovered, and the cycle life is prolonged. The method does not need to pause a low-temperature environment, does not need extra hardware support, is simple in process and short in time, and can be popularized and applied in a large scale in a low-temperature energy storage scene.

The invention relates to the technical field of positive lead paste of lead-acid storage batteries, and particularly discloses positive lead paste of a valve-regulated sealed lead-acid storage battery and a preparation method of the positive lead paste. Functional components such as stannous sulfate, antimonous oxide, graphite, a silicon dioxide dispersion liquid and hydroxylamine sulfate are added, the weight ratio of all the components is precisely regulated and controlled, all the additive components have a synergistic effect, graphite constructs a low-resistance conductive network, nano-silicon dioxide inhibits softening of lead plaster, short fibers reinforce structural stability, and hydroxylamine sulfate reduces vulcanization of a polar plate. According to the invention, the core problems of poor low-temperature charge-discharge performance, easy falling of active substances, short cycle life and the like of the valve-regulated sealed lead-acid storage battery in a low-temperature energy storage scene are solved, and meanwhile, the valve-regulated sealed lead-acid storage battery is compatible with the existing industrial production process and has remarkable technical advantages and application value.

The invention provides a cryogenic air separation device and a low-temperature liquid nitrogen energy storage coupling system. The cryogenic air separation device comprises a cryogenic air separation unit and a low-temperature liquid nitrogen energy storage coupling system, the low-temperature liquid nitrogen energy storage unit is provided with a normal-pressure liquid nitrogen storage tank and a medium-pressure liquid nitrogen storage tank which are connected, a first liquid nitrogen pressure pump is arranged on a pipeline between the normal-pressure liquid nitrogen storage tank and the medium-pressure liquid nitrogen storage tank, and the deep cooling air separation unit is connected with the low-temperature liquid nitrogen energy storage unit; the low-temperature liquid nitrogen energy release power generation unit is provided with a liquid nitrogen expansion generator set connected with a medium-pressure liquid nitrogen storage tank, and a second liquid nitrogen pressure pump is arranged on a pipeline between the medium-pressure liquid nitrogen storage tank and the liquid nitrogen expansion generator set; the low-temperature liquid nitrogen energy release power generation unit is connected with the deep cooling air separation unit so that the nitrogen source passing through the liquid nitrogen expansion power generation unit can be used for air cooling. The problems of cold energy recovery and matching of an existing deep cooling air separation device and a low-temperature energy storage system are solved, flexible energy adjustment and storage capacity is provided, the investment cost is reduced, and the material and energy utilization rate is increased.

The present invention provides an energy recovery subsystem (10) for a cryogenic energy storage system (1), the subsystem comprising: an evaporator; a first heat exchanger (21) for transferring thermal energy from a heat conduction fluid (6) to a working fluid (5); one or more expansion stages (30) for extracting work from the working fluid (5); a recuperator (40) for transferring thermal energy from one working fluid (5) to another; and the working fluid The conduit (100) of the first configuration for passing through (5) and the conduit (200) of the second configuration which is connectable to the thermal energy storage device (TESD) (3) and connected to the first heat exchanger (21) for passing the heat conduction fluid (6) through the first heat exchanger (21), the conduit (100) of the first configuration sequentially connects the evaporator (14), the recuperator (40), the first heat exchanger (21), the second recuperator (40), and one or more expansion stages (30).

An energy recovery subsystem (10) for a cryogenic energy storage system (1) comprising: an evaporator (14); a first heat exchanger (21) for passing heat energy from a heat transfer fluid (6) to a work

This invention belongs to the field of electrochemical energy storage technology, specifically disclosing an aqueous zinc-ion battery electrolyte, battery, and preparation method suitable for low-temperature environments. The electrolyte composition includes a solvent, a zinc salt, and tetraethylene glycol dimethyl ether (TEGDME) as a multifunctional regulating molecule. TEGDME disrupts the hydrogen bond network between water molecules, significantly lowering the electrolyte's freezing point and ensuring ion transport at low temperatures. Simultaneously, it reconstructs the solvation structure of zinc ions, reducing the number of solvated water molecules and suppressing water-induced side reactions. TEGDME forms a stable solid electrolyte interface (SEI) in situ on the zinc anode surface, effectively inhibiting dendrite growth and interface corrosion. This electrolyte exhibits good low-temperature fluidity, high interface stability, and excellent coulombic efficiency, significantly improving the cycle stability and lifespan of aqueous zinc-ion batteries in low-temperature environments. It is suitable for low-temperature energy storage, outdoor special power supplies, and large-scale energy storage systems.

The invention provides an industrial-grade fuel cell bidirectional temperature control heat transfer method and device, the industrial-grade fuel cell is a bipolar plate fuel cell, and the method comprises the following steps: when a bipolar plate fuel cell stack needs to be cooled, a fluid working medium in a low-temperature energy storage tank is used for absorbing heat in the bipolar plate fuel cell; the heated fluid working medium transfers heat to the high-temperature energy storage tank for storage, and the cooled fluid working medium returns to the low-temperature energy storage tank; when the bipolar plate fuel cell needs to be heated, the fluid working medium in the low-temperature energy storage tank is used for absorbing heat in the high-temperature energy storage tank, the heated fluid working medium transmits the heat to the bipolar plate fuel cell to add powder into the bipolar plate fuel cell, and the cooled fluid working medium returns to the low-temperature energy storage tank; excess heat is instantly absorbed under the high-heat-yield working condition, reverse heat supply is conducted in the cold start or low-temperature environment, the service life of the battery is prolonged, and an auxiliary heater and a matched electric power system thereof are omitted.

The application discloses a kind of photothermal heat supplement heat storage power generation systems, including low temperature energy storage system, high temperature energy storage system, fused salt energy storage device, first counterflow heat exchanger, compressor, expander, generator, photothermal heat supplement system and the connecting pipeline between them;The inlet of the compressor and the outlet of expander are communicated with the port A of low temperature energy storage system;The photothermal heat supplement system is installed between the inlet of the expander and the steam passage of first counterflow heat exchanger, and the outlet of the compressor is also communicated with the end of the steam passage of first counterflow heat exchanger;The other end of first counterflow heat exchanger steam passage is communicated with the port B of high temperature energy storage system;Two ends of the fused salt passage of the first counterflow heat exchanger are communicated with fused salt energy storage device.The application improves the power generation efficiency by adding the design of photothermal heat supplement system, and is easy to commercial implementation.