613results about "Electrolyte stream management" patented technology

The invention discloses a flow battery system and a temperature control method thereof. A positive electrode heater and a positive electrode cooler which are used as a positive electrode temperature control assembly are arranged in a positive electrode electrolyte conveying and temperature management unit, and a negative electrode heater and a negative electrode cooler which are used as a negative electrode temperature control assembly are arranged in a negative electrode electrolyte conveying and temperature management unit. Closed-loop or open-loop management is carried out on the positive electrode temperature control assembly and the positive electrode in-pile or out-pile temperature or the temperature adjusting rate of the positive electrode in-pile or out-pile temperature, and closed-loop or open-loop management is carried out on the negative electrode temperature control assembly and the negative electrode in-pile or out-pile temperature or the temperature adjusting rate of the negative electrode in-pile or out-pile temperature, so that the temperature and the temperature change rate can be effectively controlled. Through the implementation of the invention, the system temperature management can be finer, the adaptability of the system under different conditions is improved, the battery performance and the system efficiency can be improved, the operation mode can be adjusted according to requirements in the operation process, and the application is more flexible; the system operation reliability can be enhanced, the system life is prolonged, and the system efficiency is improved.

The invention discloses a short-process preparation method and application of a vanadyl sulfate electrolyte based on vanadium slag valence regulation and control, and belongs to the technical field of vanadium electrolytes. The method comprises the following steps: leaching the vanadium slag by using sulfuric acid to obtain a leaching solution containing low-valence vanadium; extracting vanadium and chromium in the leachate by adopting an amine organic extraction agent; carrying out reverse extraction by using sulfuric acid; the method comprises the following steps of: firstly, extracting and separating vanadium by using a phosphoric acid extracting agent, and finally, carrying out reverse extraction by using sulfuric acid to obtain the vanadium electrolyte which can be used for constructing a VFB-5kW / 10kWh vanadium battery energy storage system. The traditional established thinking that pentavalent vanadium is extracted through vanadium slag oxidation to serve as a vanadium source to prepare the vanadium electrolyte is broken through, the novel technology for extracting the low-valence vanadium solution from the vanadium slag to directly prepare the vanadium electrolyte is provided, the short-process and green novel technology for preparing the vanadium electrolyte from the vanadium slag is constructed, the efficiency of the vanadium electrolyte preparation technology is improved, and the preparation cost is reduced.

This invention discloses an iron-chromium redox flow battery system and a capacity recovery method including a rebalancing device, belonging to the field of flow battery technology. It includes an iron-chromium redox flow battery module, a rebalancing device, and an electrolyte readjustment module. The rebalancing device is used to electrolyze and reduce the ferric ions in the positive electrode electrolyte of the iron-chromium redox flow battery module to ferrous ions. The electrolyte readjustment module is used to correct the concentration of the reduced positive electrode electrolyte in the rebalancing device. The rebalancing device of this invention uses water electrolysis to reduce the Fe in the positive electrode electrolyte of the iron-chromium redox flow battery. 3+ Reduced to Fe 2+ This avoids the emission of electrolysis byproducts and cross-contamination of impurity ions across the membrane, making the entire rebalancing process clean and simple to operate. The electrolyte readjustment module optimizes the concentration and volume of the electrolyte after activity recovery, making it closer to the initial electrolyte composition and avoiding the problem of deteriorated flow battery performance caused by differences in electrolyte volume and concentration after capacity recovery.

The invention relates to the technical field of energy power, in particular to a fuel cell system based on a solid hydrogen pool and a hydrogen-electricity conversion efficiency determination method. The fuel cell system comprises a solid hydrogen pool module, a fuel cell module and a coupling module which are integrally assembled, the solid hydrogen pool module comprises a hydrolysis hydrogen releasing pool and a solid hydrogen storage component, the fuel cell module comprises an electrolytic tank and a proton exchange membrane, and the coupling module comprises a hydrogen conveying unit and a water circulation unit. The hydrogen conveying unit is used for conveying hydrogen released by the solid hydrogen storage component into the electrolytic tank for electrochemical reaction, and the water circulation unit is used for extracting an aqueous solution containing unelectrolyzed hydrogen in the electrolytic tank into the hydrolysis hydrogen release tank for hydrolysis hydrogen release reaction. The hydrogen element in the aqueous solution can be recycled for the second time in the hydrolysis hydrogen release tank and the electrolytic tank, so that the double hydrogen production effect is achieved, and the energy storage and hydrogen-electricity conversion efficiency is greatly improved.

The present invention discloses a modular iron-chromium liquid flow long-term energy storage system and a configuration method thereof, wherein the system includes a power module and a capacity module, wherein the power module and the capacity module are independently arranged, wherein the power module includes a battery stack unit, a power equipment unit, a monitoring and control unit and an auxiliary equipment unit, wherein the power equipment unit is connected to the battery stack unit, the monitoring and control unit is respectively connected to the battery stack unit and the power equipment unit, and the auxiliary equipment unit is independently arranged and integrated with the battery stack unit, the power equipment unit and the monitoring and control unit in a container body. The present invention realizes product standardization, generalization and customization by disassembling the product functions of the iron-chromium liquid energy storage system to form independent modules, and realizes the simplification of the floor space through the reasonable configuration between the modules, improves the flexibility of the configuration of the iron-chromium liquid flow energy storage, and reduces the cost of construction and operation and maintenance.

The invention discloses a flow battery system and a temperature management method thereof, the flow battery system has indirect cyclic heating and cooling functions by arranging a two-stage heat exchange component and an auxiliary component, and the temperature of the flow battery system can be controlled by interlocking the indirect heating component or the cooling component and the auxiliary component with a pre-stack or post-stack temperature value. The preheating, heat dissipation and low-temperature protection of the positive or negative electrolyte in the standby process, the operation process and the long-time shutdown process of the flow battery system are realized; the heating component, the cooling component and the pre-stack temperature or the post-stack temperature can be subjected to double-closed-loop interlocking control, so that the heating rate or the cooling rate can be controlled. Through the implementation of the method, the uniformity of a temperature field in the electrolyte heat exchange process of the system is improved, the problems of decomposition or precipitation of active reaction substances and the like caused by overlarge local temperature difference of the electrolyte are avoided, and the adaptive capacity of the system when the load is greatly changed and the environment temperature is changed in a wide range can be enhanced; and the operation stability and reliability of the flow battery system are improved.

The invention discloses a flowing type vanadium-based electric fuel energy storage and supply system which comprises an electric pile reaction module, an electrolyte driving module and a medium storage module, and the electric pile reaction module comprises an oxygen evolution reaction flowing unit, a vanadium electrolyte flowing unit and an oxygen reduction reaction flowing unit which are arranged adjacently in pairs; a first flow field plate in the oxygen evolution reaction flow unit is provided with a bionic dendritic interdigital first flow channel; a second flow field plate in the vanadium electrolyte flowing unit is provided with a bidirectional spiral interdigital second flow channel; a third flow field plate in the oxygen reduction reaction flow unit is provided with a third multi-stage fractal interdigital flow channel; the medium storage module comprises a vanadium electrolyte storage tank and a reaction medium storage tank, the vanadium electrolyte storage tank and the reaction medium storage tank are arranged on the two opposite sides of the galvanic pile reaction module, the vanadium electrolyte storage tank is connected with the second flow field plate, and the reaction medium storage tank is connected with the second flow field plate and the third flow field plate. According to the system, the integration level of the system is improved on the basis of reducing the cost.

The utility model provides a tubular flow battery liquid storage tank which comprises an electrolyte liquid storage tank body, a turbulent flow mixing part is arranged at the bottom of the electrolyte liquid storage tank body, the liquid outlet end of the turbulent flow mixing part is connected to a liquid outlet pipe, the electrolyte liquid storage tank body is filled with electrolyte, and the electrolyte flows to the liquid outlet pipe through the turbulent flow mixing part. And a plurality of inlet ends are arranged on the turbulent flow mixing part, and the multiple inlet ends are used for carrying out turbulent flow mixing on the electrolyte filled in the electrolyte storage tank body. According to the tubular liquid storage tank for the flow battery disclosed by the utility model, a plurality of inlet ends are arranged aiming at a square groove liquid storage tank which is most commonly used by a prefabricated cabin type flow battery, so that an electrolyte can form vortexes in a plurality of areas in a flowing process in the tank, and the electrolyte can be fully mixed to reduce flowing dead zones; the mixing degree and turbulence degree of liquid in the tank are improved, a flowing dead zone is avoided, and the utilization rate of electrolyte is improved.

The invention discloses an all-vanadium redox flow battery positive and negative electrode storage tank liquid level automatic balance control device which comprises a positive electrode electrolyte storage tank, a negative electrode electrolyte storage tank and a galvanic pile, a first circulation loop is formed between the positive electrode electrolyte storage tank and the galvanic pile, and a second circulation loop is formed between the negative electrode electrolyte storage tank and the galvanic pile. Venturi tubes are arranged on the positive electrode electrolyte return pipeline and the negative electrode electrolyte return pipeline, liquid pumping holes of the Venturi tubes are communicated with the negative electrode electrolyte storage tank and the positive electrode electrolyte storage tank through an electrolyte pumping pipeline, and a liquid level monitoring device is arranged on the electrolyte pumping pipeline. The venturi tube is communicated with the electrolyte suction pipeline, and redundant electrolyte in one electrolyte storage tank is sucked into the other electrolyte storage tank by means of pressure difference generated by the venturi tube, so that the design of the positive and negative electrolyte storage tanks is not limited by the relative height of the electrolyte level, and the space of the storage tanks can be fully utilized; the integration level of the battery system is improved, and the occupied area is reduced.

The invention provides a method and a system for controlling a flow battery, electronic equipment and a storage medium. The flow battery comprises an electric pile for accommodating electrolyte and a circulating pump for driving the electrolyte. According to the method, the first pressure difference between the inlet and the outlet of the galvanic pile is determined, whether the flow of the electrolyte reaches the target flow or not is determined by using a first model based on the first pressure difference, and the first model comprises the corresponding relation between the pressure difference between the inlet and the outlet of the galvanic pile and the target flow; in response to the fact that the flow of the electrolyte does not reach the target flow, the rotating speed of the circulating pump is adjusted to increase the first pressure difference, and therefore the flow of the flow battery is controlled by adjusting the first pressure difference without using a flow meter.

The invention discloses a vanadium electrolyte online repairing system, and relates to the technical field of all-vanadium battery operation and maintenance. The device comprises a box body, a sulfuric acid tank and a galvanic pile are arranged in the box body, a horizontal mounting table is mounted in the box body, the galvanic pile is placed on the mounting table, the sulfuric acid tank is arranged below the mounting table, and the sulfuric acid tank is communicated with an anode chamber of the galvanic pile through a first circulating system; a liquid inlet end and a liquid outlet end of a cathode chamber of the electric pile are respectively communicated with a feeding pipe and a discharging pipe, the feeding pipe and the discharging pipe extend out of the box body and are communicated with a vanadium battery electrolyte system, the top surface of the sulfuric acid tank is communicated with an exhaust pipe, and the exhaust pipe extends out of the box body; therefore, the purpose of repairing the electrolyte of the all-vanadium battery on line without stopping the all-vanadium battery is achieved.

The present disclosure relates to an assembly for thermal management of a fuel cell. A fuel cell assembly is provided that includes a plate assembly having an anode inlet, a cathode inlet, a first coolant inlet, and a second coolant inlet. The first coolant inlet is positioned adjacent to the anode inlet on the first plate side. The second coolant inlet is positioned adjacent to the cathode inlet on the second plate side. The inlet is arranged so that the coolant affects the reactant temperature at the anode inlet and the cathode inlet to promote a uniform hydration distribution of the membrane formed during fuel cell operation. The fuel cell assembly may include a hydrogen channel, an oxygen channel, and a coolant channel. The coolant channel may extend between the hydrogen channel and the oxygen channel to extract heat from the hydrogen and oxygen flowing through the hydrogen channel and the oxygen channel, and to allow the hydrogen and oxygen to be close enough to each other for a chemical reaction between them.

The invention discloses an efficient vanadium-hydrogen integrated system based on thermal cycle and a control method thereof, and relates to the technical field of electric energy storage. Comprising an all-vanadium redox flow energy storage system and a hydrogen production system, the all-vanadium redox flow energy storage system comprises an electric pile, a first liquid storage tank, a second liquid storage tank, a positive electrode electrolyte arranged in the first liquid storage tank, a negative electrode electrolyte arranged in the second liquid storage tank, a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, the first heat exchanger and the second heat exchanger are located in the first liquid storage tank and the second liquid storage tank respectively, and the third heat exchanger and the fourth heat exchanger are located outside the first liquid storage tank and the second liquid storage tank respectively. The first heat exchanger and the second heat exchanger are connected with the heating source and the waste heat utilization unit through pipelines; and the third heat exchanger and the fourth heat exchanger are connected with the heat utilization unit through pipelines. The energy consumption of the integrated system is effectively reduced, and the overall operation efficiency of the system is improved.

The invention provides an energy storage power station, application of the energy storage power station and a liquid flow energy storage tank box. The liquid flow energy storage tank box comprises a frame, a liquid storage tank, a liquid inlet pipe and a liquid outlet pipe. The liquid storage tank is fixed in the frame, the corner fittings are arranged at the top and the bottom of the frame so that the liquid storage tank can be fixed to a transport vehicle and can be mutually fixed and stacked, and transportation and installation of the liquid flow energy storage tank box are facilitated. The liquid storage tank is used for containing electrolyte, the electrolyte can be transported along with the liquid flow energy storage tank box, and the electrolyte does not need to be transported independently. And the electrolyte does not need to be transferred for multiple times, so that the probability of electrolyte leakage is effectively reduced, and the safety is high. Meanwhile, the pollution to the environment is reduced. The liquid flow energy storage tanks can be stacked through the corner fittings, and the occupied area of the energy storage power station is reduced. According to the structure of the energy storage power station, by adding the liquid flow energy storage tanks and stacking the liquid flow energy storage tanks, the energy storage capacity of the energy storage power station can be expanded, the construction efficiency of the energy storage power station is improved, the cost is reduced, and convenient transportation and installation of the large liquid flow energy storage power station are achieved.

The invention relates to a liquid flow battery electrolyte storage device, and relates to the technical field of liquid flow battery electrolytes.The liquid flow battery electrolyte storage device comprises a tank shell and a heat exchange pipe, a spiral storage pipe barrel arranged in the vertical direction is arranged in the tank shell, electrolyte is arranged in the storage pipe barrel, the storage pipe barrel is connected with a liquid pump, the heat exchange pipe is spiral, and the heat exchange pipe is connected with the liquid pump. The storage pipe barrel is arranged vertically in a spiral mode and arranged outside the storage pipe barrel in a sleeving mode, heat exchange liquid is arranged in the heat exchange pipe, the heat exchange pipe is connected with a liquid supply circulating device, the flowing direction of the electrolyte is opposite to that of the heat exchange liquid, the storage pipe barrel is vertically arranged in a spiral mode, the electrolyte in the storage pipe barrel can form ordered layering in the storage pipe barrel, and therefore the heat exchange effect is improved. According to the utility model, the generation of a flowing dead zone is avoided, the occurrence of a side reaction, namely a hydrogen evolution reaction, caused by the mixing of two different ions is also reduced, the heat exchange area is increased, countercurrent flow heat exchange is realized, and the heat exchange efficiency of the device is further ensured.

The invention belongs to the technical field of redox flow batteries, and discloses an all-vanadium redox flow battery system for realizing thermal management by utilizing a heat pump technology and a control method, an electrolyte heat exchange system consists of an electrolyte storage tank, a motor and an electrolyte heat exchanger which form a closed loop, the electrolyte storage tank is filled with an electrolyte, and the motor is filled with an electrolyte heat exchanger; the refrigerant heat exchange system is composed of a heat exchange medium, a motor and a refrigerant heat exchanger which form a closed loop, an adjusting valve is arranged on a pipeline between the electrolyte heat exchange system and the refrigerant heat exchange system, the electrolyte storage tank is provided with a temperature sensor, and the control system is electrically connected with the reversing valve, the adjusting valve and the temperature sensor. One end of the reversing valve is connected with an inlet and an outlet of the compressor, and the other end of the reversing valve is connected with internal pipeline inlets of the electrolyte heat exchanger and the refrigerant heat exchanger. And heating and refrigeration are integrated into one system, so that the problem of high heat exchange energy consumption of the current all-vanadium redox flow battery system is solved, and the efficiency of the all-vanadium redox flow battery system can be effectively improved.

The present invention provides a dendrite-free zinc-based flow battery. The flow battery includes an anode integrated with a first collector, a cathode integrated with a second collector, a first storage tank comprising catholyte, a first pump connects the cathode and the first storage tank, a second storage tank comprising anolyte and liquid eutectic alloys, a second pump connects the anode and the second storage tank, and a separator to prevent direct contact between the anolyte and the catholyte. The room-temperature gallium-based liquid metals (Ga-LM) alloys enable zinc-based flow batteries (Zn-FBs) to achieve unparalleled areal capacity and exceptionally long cycle life.

Redox flow battery (1) comprising a cell arrangement (2), a control device (5) and two electrolyte circuits, each electrolyte circuit comprising a tank (3) for storing electrolyte fluid, a piping system and a pump (4) for circulating electrolyte fluid in the electrolyte circuit, and wherein the piping system includes a supply line (6.1) from the tank to the cell arrangement and a return line (6.2) from the cell arrangement to the tank, wherein the pump (4) is arranged in the supply line, and wherein each electrolyte circuit comprises an additional pipeline (7) and a shut-off valve (8), wherein the shut-off valve is arranged in the additional pipeline, and wherein the additional pipeline branches off at a first end from the pipeline system in the direction of flow of the electrolyte fluid downstream of the pump and opens at a second end into the return line or the tank, and wherein the control device is configured to control the closing states of the shut-off valves in order to improve the mixing of the electrolyte fluid stored in the tanks in predetermined operating conditions.

The invention discloses a flow battery stack structure based on multi-channel and multi-layer cross flow channels and a control method thereof, the flow battery stack structure comprises single stack assemblies which are connected in series, two collector plates are respectively arranged on two sides of the plurality of single stack assemblies, two end plates are respectively arranged on the outer sides of the two collector plates, and the two end plates are respectively arranged on the outer sides of the two collector plates. Each single electric pile assembly comprises an electrode frame, bipolar plates, an electrode plate and an ion exchange membrane, and a multi-channel and multi-layer cross flow channel for uniform circulation of an electrolyte is formed between the bipolar plates and the electrode plates. The first bipolar plate, the second bipolar plate and the third bipolar plate are provided with transverse flow channels, longitudinal flow channels and cross flow channels; the electrode plates are mutually overlapped to form a multi-channel and multi-layer cross flow channel, so that the electrolyte is fully mixed and circulated in the multi-channel and multi-layer cross flow channel, and the concentric-square-shaped flow channels and the flow guide cavities on the electrode plates generate a concentric-square-shaped turbulent flow effect, so that the electrolyte and active substances are fully mixed and reacted, the electrolyte can be uniformly distributed, the concentration of the electrolyte is stable, and the reaction efficiency of the flow battery is improved.

The invention provides a method and system for controlling a flow battery, electronic equipment and a storage medium, and the method comprises the steps: obtaining at least one temperature value of at least one temperature sensor, responding to the at least one temperature value meeting a first condition, and opening a circulating pump of the flow battery to drive an electrolyte in a liquid storage tank of the flow battery to circulate; and in response to the condition that at least one temperature value meets a second condition, opening a valve and a circulating pump of the flow battery to drive the electrolyte to circulate between a galvanic pile and a liquid storage tank of the flow battery, thereby optimizing a heating strategy of the flow battery in an electrolyte circulating manner, reducing the temperature gradient of the electrolyte and further prolonging the service life of the electrolyte.

A redox flow battery comprises: a battery cell; a tank with an electrolyte stored therein; a pipe that interconnects the tank and the battery cell; and a pump provided at the pipe, wherein the battery cell and the pump are disposed at a level higher than the tank, the redox flow battery has a supply port for introducing a gas into the pipe, and the pipe is provided such that the electrolyte is held in a suction port of the pump when the pump is stopped.

The utility model discloses an all-vanadium redox flow battery system and a non-stop capacity recovery device, and belongs to the field of redox flow batteries. The bypass pipeline is added on the basis of an existing all-vanadium redox flow battery system, a non-stop capacity recovery device for controlling the improved all-vanadium redox flow battery system is designed in a matched mode, and the capacity recovery capacity of the improved all-vanadium redox flow battery system is improved by setting battery system charging, an electrolyte temperature threshold value interval and a discharging energy threshold value and controlling a positive and negative pole loop and a liquid return bypass. And transferring the one-pole electrolyte with the high electrolyte liquid level into the one-pole electrolyte with the low electrolyte liquid level, so that the volume of the two-pole electrolyte is recovered to the initial state. According to the invention, adjustment can be rapidly completed in the process of not stopping the pump and charging and discharging, and capacity recovery is realized.

The invention relates to the technical field of electrolyte repair, in particular to an online electrolyte repair device and method. The device is used for repairing the vanadium battery electrolyte with unbalanced valence state. The device comprises a first storage tank, a repairing electric pile and a flow direction adjusting assembly, the first storage tank is used for containing repair liquid; the repairing electric pile comprises a positive electrode side and a negative electrode side which are separated by a diaphragm; the positive electrode side is provided with a first interface and a second interface, and the first interface and the second interface are both connected to the first storage tank; the negative electrode side is connected to a second storage tank for containing the electrolyte to be repaired in the vanadium battery energy storage system; and the flow direction adjusting assembly is used for adjusting the flow direction of the repairing liquid in the positive electrode side. According to the device, the carbon felt structure and the repairing liquid circulation mode are optimized, so that the discharge of reaction gas in the repairing electric pile can be promoted, and the repairing efficiency of the vanadium battery electrolyte is further ensured.

The utility model relates to the technical field of chemical energy storage battery manufacturing, in particular to an electrolyte constant temperature device for an all-vanadium redox flow battery, which comprises a tank body and a sealing cover, the sealing cover is mounted at the upper end of the tank body, a constant temperature mechanism is arranged on the inner wall of the tank body, and the constant temperature mechanism comprises a mounting ring and an injection pipe. The upper end of the mounting ring is fixedly connected with the tank body, the outer wall of the injection pipe is fixedly connected with the tank body, and the inner wall of the mounting ring is in threaded connection with the fixing rod. After positive electrode electrolyte and negative electrode electrolyte of the all-vanadium redox flow battery enter the spiral liquid storage pipe from the upper end, stirring liquid on the round rod is electrically and regularly driven to rotate, so that the temperature in the tank body is absorbed by the spiral liquid storage pipe and is uniformly stirred again, and the temperature sensor also detects the temperature in real time; the water pump pumps out water at different temperatures at the two ends of the auxiliary tank body, the temperature in the tank body is adjusted in real time, the constant-temperature effect in the tank body is achieved, and the long-time constant-temperature effect can also be achieved.

The invention discloses a flow battery multi-stack cascade test system, and relates to the technical field of flow battery energy storage systems. The flow battery multi-stack cascade test system comprises a stack setting module which comprises a plurality of stack setting units, each stack setting unit comprises a plurality of stack setting groups, and each stack setting group comprises at least one stack setting mechanism; the galvanic pile arrangement structure is used for arranging a galvanic pile and comprises a galvanic pile positive electrode liquid inlet, a galvanic pile negative electrode liquid inlet, a galvanic pile positive electrode liquid outlet and a galvanic pile negative electrode liquid outlet; and the electrolyte circulating module comprises a positive electrode liquid storage tank, a negative electrode liquid storage tank, a positive electrode main liquid inlet pipeline, a positive electrode auxiliary liquid inlet pipeline, a positive electrode main liquid return pipeline, a negative electrode main liquid inlet pipeline, a negative electrode auxiliary liquid inlet pipeline, a negative electrode main liquid return pipeline and a plurality of control valves arranged in the pipelines. According to the technical scheme of the invention, multiple liquid supply modes in the flow battery multi-stack cascade test system can be realized, and the influence of different liquid supply modes on the charge and discharge efficiency of the flow battery energy storage system can be detected.

The invention provides an intelligent capacity management system for an all-vanadium redox flow battery, which comprises a control device and an electrolyte capacity recovery device, and is characterized in that the control device is used for acquiring the discharge capacity and charge-discharge cycle data of the all-vanadium redox flow battery after single discharge cycle; based on the charge-discharge cycle data, performing prediction through an electrolyte average valence state monitoring model to obtain an electrolyte average valence state of the current electrolyte; when the discharge capacity is smaller than a capacity threshold value, the electrolyte capacity recovery device is controlled to carry out liquid mixing operation; when the discharge capacity is larger than or equal to a capacity threshold value and the average valence state of the electrolyte is larger than an average valence state threshold value, the electrolyte capacity recovery device is controlled to carry out electroreduction capacity recovery operation; and automatic liquid mixing and electroreduction capacity recovery operations of the all-vanadium redox flow battery are realized.

The invention relates to the technical field of flow batteries, and provides a liquid mixing control method and device, a flow battery system and a storage medium. The flow battery comprises a positive electrode electrolyte circulating pipeline, a negative electrode electrolyte circulating pipeline, an electric pile, an electrolyte tank and a partition plate for partitioning the electrolyte tank into a positive electrode electrolyte tank and a negative electrode electrolyte tank, and the positive electrode electrolyte tank and the negative electrode electrolyte tank share the electrolyte tank. The liquid mixing control method comprises the following steps: determining an electrolyte volume difference in a positive electrode electrolyte tank and a negative electrode electrolyte tank; determining a liquid mixing control strategy according to the volume difference of the electrolyte; and the separator is controlled to move according to the liquid mixing control strategy for liquid mixing, so that ions in the positive and negative electrolyte rapidly recover balance, the activity of the electrolyte is improved, the effective active couple concentration in the electrolyte is increased, the battery capacity is recovered, and the charging and discharging efficiency is improved.

The present invention relates to the technical field of iron-chromium liquid flow battery, and specifically discloses a quantitative rebalancing system and rebalancing method of an iron-chromium liquid flow battery with instant response, wherein the system comprises an iron-chromium liquid flow battery stack, a positive electrode storage tank, a negative electrode storage tank, a control system, a sieve plate tower, an acid storage tank, a gas generator, a booster pump, an absorption tank, a cyclone separator, a filter, a rebalancing electrolyte storage tank, a solid recovery tank and an air compressor. The sieve plate tower is the place where the rebalancing reaction occurs, and the gas generator is used to generate the rebalancing reactant, which is passed into the sieve plate tower through the booster pump; the electrolyte after the rebalancing is completed is separated by the cyclone separator and the filter, the absorption tank can remove the excess gas in the reaction process, and the absorption liquid can be passed into the air by the air compressor for regeneration and recycling. The system of the present invention can achieve instant response after feeding, start the rebalancing reaction at any time, and can achieve quantitative rebalancing of the excess trivalent iron ions in the positive electrode electrolyte, and the process flow is simple and safe.

The invention discloses a dynamic energy storage liquid flow circulation control system and method. The dynamic energy storage liquid flow circulation control system comprises an inverter, a control system, a liquid flow energy storage system, a liquid flow circulation system, a connecting pipeline and a valve set. The liquid flow energy storage system consists of a plurality of single battery systems and a public battery system, and is provided with an electric pile unit, an electrolyte storage tank and a circulating pump; the liquid flow circulation system comprises a lifting pump, a set of high-position storage tank and a set of low-position storage tank, liquid flow circulation is achieved through gravitational potential energy and the lifting pump, the control system conducts coordinated control on a circulation pump, the lifting pump and a valve set, and liquid flow circulation control of a conventional operation stage and an instruction response stage is achieved. Direct current generated by electrochemical reaction of the galvanic pile unit is converted into alternating current through the inverter to be supplied to a power grid for use, the state of the system is monitored in real time through the voltage sensor, the current sensor and the hydraulic sensor, and efficient and stable operation is ensured. Through the design, electric energy and chemical energy are efficiently converted, continuous charging and discharging are supported, and the overall efficiency and flexibility of the system are improved.

The invention provides a non-flat-layer arrangement flow battery and a control method and device thereof. The flow battery comprises a positive storage tank, a positive pump, a positive liquid supply pipe, an electric pile and a positive liquid return pipe which are communicated in sequence, the positive buffer tank is communicated to the positive liquid return pipe through a first liquid phase branch and is communicated to the upper gas space of the positive storage tank through a first gas phase branch, and a positive liquid level sensor is arranged on the positive buffer tank; the negative electrode storage tank, the negative electrode pump, the negative electrode liquid supply pipe, the electric pile and the negative electrode liquid return pipe are sequentially communicated, the negative electrode buffer tank is communicated to the negative electrode liquid return pipe through a second liquid phase branch and is communicated to the upper gas space of the negative electrode storage tank through a second gas phase branch, and a negative electrode liquid level sensor is arranged on the negative electrode buffer tank. The negative pressure of the galvanic pile is avoided, the safety of the redox flow battery is protected, and the stable operation of the redox flow battery is facilitated.