CN114824374B - Temperature control device for all-vanadium redox flow battery - Google Patents
Temperature control device for all-vanadium redox flow battery Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
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- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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Abstract
The invention relates to a temperature control device for an all-vanadium redox flow battery, which comprises an external controller for controlling the working condition of the all-vanadium redox flow battery, and is characterized in that the external controller carries out rotation type heat exchange adjustment on the all-vanadium redox flow battery under different working conditions according to heat generation quantity, and the external controller determines the starting time and the temperature adjustment mode required by a battery system by comparing the temperature values of positive and negative electrolyte and the difference of the proper starting temperature of the battery system. The external controller starts corresponding heat exchange equipment according to heat to conduct targeted heat adjustment and recycling on the flow batteries under different reaction working conditions. According to the invention, the temperature control device is used for enabling the all-vanadium redox flow battery to be suitable for various temperatures and various loads, so that the application range of the all-vanadium redox flow battery is wider, and the use periodicity is longer.
Description
The original basis of the divisional application is application number 202110116179.7, application date 2021, 1 month and 27, and the patent application with the name of "a voltage balance control method for an energy storage module device of an all-vanadium redox flow battery" claims priority of application number 202011532890.2, and priority date 2020, 12 months and 21 days.
Technical Field
The invention relates to the technical field of flow batteries, in particular to a temperature control device for an all-vanadium flow battery.
Background
The all-vanadium redox flow battery is a redox battery taking vanadium as an active material and presenting a circulating flow dynamic state. The electric energy of the vanadium battery is stored in sulfuric acid electrolyte of vanadium ions with different valence states in a chemical energy mode, the electrolyte is pressed into a battery reactor through an external pump, the electrolyte circularly flows in closed loops of different liquid storage tanks and half batteries under the action of mechanical force, a proton exchange membrane is adopted as a diaphragm of a battery pack, electrolyte solution parallelly flows through the surfaces of electrodes and generates electrochemical reaction, and electric current is collected and conducted through double electrode plates, so that the chemical energy stored in the solution is converted into electric energy.
The temperature of the electrolyte is increased due to heat generated by chemical change in the process of charging and discharging the existing all-vanadium redox flow battery, the solution is evaporated and increased due to the fact that the temperature is too high, the service performance of the battery is affected due to environmental deterioration and energy consumption increase, the permeability of the battery is reduced if the temperature is too low, the internal resistance of the electrolyte is increased, the diffusion procedure is reduced, and the electrochemical reaction is slowed down, so that the battery capacity is reduced.
CN109841927a discloses an electric automobile power battery thermal management device suitable for alpine regions, which comprises an insulation box body, a cooling device, a battery temperature detection element and a control processor module: when the battery box is used, the battery is arranged on the battery placing part in the heat preservation box body, so that the heat absorbing part of the cooling device and the battery temperature detecting element are attached to the battery; when the temperature of the battery is higher than a preset value during operation, the battery temperature detection element transmits a signal to the control processor module, then the control processor module controls the cooling device to start cooling operation, the heat absorption part of the cooling device absorbs heat and transmits waste heat to the heat dissipation part, and then the heat dissipation part volatilizes the waste heat to the outside of the heat preservation box body; when the temperature of the battery is lower than a preset value, the battery temperature detection element transmits a signal to the control processor module, and then the control processor module controls the cooling device to stop cooling, so that heat generated by continuous heating of the battery is accumulated in the heat preservation box body.
The design of this patent still suffers from at least one of several technical problems:
1. the mode realizes the control of the temperature of the electrolyte and carries out simple heat recovery, but the heat utilization way is single;
2. The temperature is not adjusted and controlled in a targeted manner according to the actual operation condition and the operation environment of the battery in the charge and discharge stage, so that unnecessary regulation and control processes and more resource waste can be caused;
3. under some special regions or large temperature difference environment conditions, the electric quantity is not correspondingly adjusted according to the heat change in the reaction process of the energy storage battery system so as to meet the proper electric quantity requirement under each working condition.
Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present invention was made, the text is not limited to details and contents of all that are listed, but it is by no means the present invention does not have these prior art features, the present invention has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.
Disclosure of Invention
The invention provides an energy storage module device for an all-vanadium redox flow battery and a voltage balance control method thereof, which are used for overcoming the defects of the prior art, wherein vanadium redox flow can be selectively connected to a reactor on-off, and the specific device of the method comprises a detection device, a heat management device for performing temperature adjustment on electrolyte and performing heat management, and a controller for adjusting the operation mode of the whole system besides a reaction device. The battery reaction device is characterized in that the charging and discharging states of the battery reaction device are detected through the detection device, information acquired by the detection device is transmitted to the external controller, the external controller controls the starting and stopping of the heat management device based on charging and discharging signals provided by the detection device, a heat storage tank for storing and utilizing electrolyte heat is arranged in the heat management device, a liquid heat storage medium for exchanging heat in an indirect contact and non-mutual dissolution mode with the electrolyte is preset in the heat storage tank, the heat storage tank for containing the liquid heat storage medium for storing the electrolyte heat is in physical contact in a non-liquid flow mixing mode to realize centralized management and multi-directional utilization of the heat acquired from the electrolyte, and meanwhile, the external controller determines proper electric quantity under all working conditions according to the nonlinear relation between the heat and the electric quantity, so that the energy storage system is guaranteed to operate efficiently and independently.
The invention also relates to a voltage balance control method for the energy storage device of the all-vanadium redox flow battery. Preferably, the method is capable of controlling the operating condition of the all vanadium redox flow battery energy storage device by an external controller, wherein the controller is programmed to perform at least the following steps:
s1, determining the temperature of electrolyte at least on one side in a positive and negative electrode reaction area of a battery in real time by means of a temperature measuring device of the battery energy storage device by an external controller for controlling the working condition of the all-vanadium redox flow battery energy storage device;
s2, the external controller for controlling the working condition of the energy storage device of the all-vanadium redox flow battery judges the external environment temperature of the energy storage device in real time by means of a temperature measuring device of the controller;
s3, the external controller for controlling the working condition of the energy storage device of the all-vanadium redox flow battery is used for judging the power load of the system by combining the real-time current and/or voltage values;
the external controller for controlling the working condition of the energy storage device of the all-vanadium redox flow battery determines the real-time power generation amount of the system according to the steps, calculates the synchronous system power generation amount according to the obtained power generation amount, carries out rotation type heat exchange adjustment on the energy storage device under different working conditions according to the power generation amount, plans heat management in advance, and utilizes a negative feedback mechanism to adjust the temperature to establish the proper electric quantity under the corresponding working conditions by referring to the nonlinear relation between the heat and the electric quantity.
The technical proposal has the advantages that: according to the invention, the external controller carries out rotation type heat exchange adjustment on the energy storage device under different working conditions according to the generated heat, so that the waste of extra resources is reduced to a certain extent, the cost is saved, the adjustment mode can ensure the stable output of the self power function while maintaining the rest electronic power equipment for controlling the stable operation of the whole energy storage power station and/or the peak shaving base station, and ensure the stable operation of the all-vanadium redox flow battery reaction device serving as a main energy source in the whole energy storage system, thereby realizing the utilization of multiple ways of heat generated by the whole energy storage system.
Preferably, a temperature measuring device in the reaction area of the negative half cell is arranged in the reactor of the negative half cell or the storage tank of the negative electrolyte or the circulation pipeline of the negative electrolyte to directly measure the temperature of the negative electrolyte, and a temperature measuring device in the reaction area of the positive half cell is arranged in the reactor of the positive half cell or the storage tank of the positive electrolyte or the circulation pipeline of the positive electrolyte to directly measure the temperature of the positive electrolyte and/or calculate according to the measured temperature value of the negative electrolyte by a formula.
The advantages are that: the measurement results of the positive electrode and the negative electrode at the two sides of the battery are independent, but the nonlinear relevance in the mathematical relationship is maintained, so that the temperature change range at the other side can be directly and/or indirectly reflected through the real-time temperature change value at one side, and the controller can adjust the temperature of the energy storage system in time. Particularly, as a temperature measuring device such as a temperature sensor is easy to mismeasure due to the fact that electrolyte is precipitated or precipitated and used with time, the aging condition of the electrolyte can be predicted through nonlinear correlation calculation, and the prediction of the replacement time of the electrolyte is facilitated; in addition, the independent measurement results of the positive electrode and the negative electrode on the two sides of the battery can be used for periodically checking the temperature measuring device, at least two predictive fault results can be calculated according to the nonlinear relevance when the single-side temperature measuring device fails, maintenance personnel can conveniently make a decision on a maintenance strategy, and particularly extreme operation conditions can be avoided.
Preferably, the external environment temperature is directly measured by a temperature measuring device of the external controller, and the external controller determines the starting time and the temperature regulation mode required by the battery system by comparing the temperature values of the positive and negative electrolytes with the difference of the proper starting temperature of the battery system.
The advantages are that: the external controller starts corresponding heat exchange equipment to convey heat recovered by a heat storage medium stored in the heat storage tank to the outer side of the device in the form of heat exchange fluid under the condition of not entering the reaction device of the all-vanadium redox flow battery, so that the whole reaction device is subjected to temperature regulation and stepwise adjustable heating, the temperature rise regulation rate and time of each stage can be adaptively adjusted according to real-time temperature change conditions, when the temperature value of the reaction device of the all-vanadium redox flow battery reaches a temperature value required by the stable operation of the reaction device, the heat storage device is turned off through the external controller, and a heat circulation pipeline connected with the reaction device of the all-vanadium redox flow battery is cut off so as to stop the sustainable adjustable heating process of the device, the heat recovered by the heat management system is selectively utilized while the normal start and stable operation of the energy storage system are ensured, the further waste of resources is reduced, and the operation efficiency of the whole energy storage system is improved.
Preferably, the external controller calculates the nonlinear variable power load value according to the current and/or voltage value output by the energy storage system in real time, and corresponds to the parameters such as the electrolyte temperature, the external environment temperature and the like related to the nonlinear variable power load value and forms a data set.
The advantages are that: the relation among the parameters in the data set is one-to-one correspondence, so that the subsequent calculation of heat and electric quantity is facilitated, and the calculation is taken as the basis of the result.
Preferably, according to the data set, the external controller calculates the power generation amount of the system under each working condition through a formula, and simultaneously obtains the heat under the corresponding working condition to establish the nonlinear relation between the heat and the power and form an empirical numerical table, wherein the empirical numerical table can be obtained through limited times of experiments in combination with the prior knowledge in the field, and even can be subjected to data simulation or fitting through an editing program, so that the accuracy of the empirical numerical table is further improved.
The advantages are that: by establishing a nonlinear relation between heat and electric quantity and forming a specific empirical value table, the complex relation between heat and electric quantity in the operation process of the energy storage system can be simplified and qualitatively described, namely, the relation between heat and electric quantity can be intuitively represented according to a relatively simple empirical value curve and/or formula, and the relation is used as a basis for adjusting the electric quantity in the same period by utilizing the heat generated by the energy storage system, so that the operability of maintaining the operation of the energy storage system can be remarkably improved, and the workload of maintenance personnel can be reduced.
Preferably, the external controller starts the corresponding heat exchange equipment according to the heat to perform targeted heat adjustment and recycling on the flow batteries under different reaction working conditions, and establishes the appropriate electric quantity of the energy storage system under the corresponding heat production working conditions according to the empirical numerical table.
Preferably, if the external controller determines that the all-vanadium redox flow battery is in a low-temperature and/or low-load working state according to the parameters, the corresponding heat exchange equipment is started to perform a self-heat exchange circulation process of the electrolyte in the positive half-battery reaction area and the electrolyte in the negative half-battery reaction area in the reaction system, heat recovery is not performed, and meanwhile, the appropriate electric quantity is determined according to the nonlinear relation between the calculated heat and the electric quantity at the stage and by combining an empirical numerical table.
The advantages are that: because the external environment temperature is lower, the running environment of each heat exchange device on the heat circulation pipeline in the whole heat management system is poorer at the moment, if the corresponding heat exchange device is difficult to start at the moment, the power consumption after the device is started is larger, the heat exchange and heat recovery efficiency is relatively poorer, the power generation condition after the device is started is also optimistic, the external heat exchange medium does not need to be introduced to participate in the heat exchange process in the heat exchange mode, the self-heating utilization of electrolyte can be realized without starting all the heat exchange devices in the heat circulation pipeline, the heat recovery is not carried out, the energy consumption of the system is further increased, the economic value significance of the heat recovery is realized, and in addition, the power output efficiency of the energy storage system is further improved while the resource utilization rate is improved.
Preferably, if the external controller determines that the all-vanadium redox flow battery is in a high-temperature and/or high-load working state according to the parameters, the corresponding heat exchange equipment is started to perform cooling circulation and heat management on the electrolyte in at least a part of the positive half-battery reaction area and/or the negative half-battery reaction area, and meanwhile, the proper electric quantity is determined by combining an empirical numerical table according to the nonlinear relation between the calculated heat and the electric quantity at the stage.
The advantages are that: because the energy storage system is in a high-temperature high-load working state at this moment, the energy consumption is larger during operation, high energy generation quantity is generated simultaneously, and meanwhile, the energy storage system is accompanied with higher heat generation, so that proper temperature adjustment and heat recovery processes are needed, the rotation type heat exchange adjustment can meet proper operation temperature conditions required by the energy storage system under the high-temperature high-load condition, at least one side of the rotation type heat exchange adjustment can be selectively subjected to temperature adjustment according to different temperature change conditions of a positive electrode and a negative electrode, the heat generated in the adjustment process is subjected to specific heat recovery and subsequent utilization, and the heat loss is avoided and meanwhile, the rotation type heat exchange adjustment can be provided for a proper operation environment of the energy storage system, so that the power output efficiency of the energy storage system is improved.
Preferably, if the external controller determines that the all-vanadium redox flow battery is in a normal temperature medium-low load and/or normal load working state according to the parameters, at least one heat exchange device in the heat pump unit is started or a natural cooling mode is adopted without starting to meet the operation conditions required by the all-vanadium redox flow battery reaction device and heat recovery is not performed, and meanwhile, the proper electric quantity is determined by combining an empirical numerical table according to the nonlinear relation between the calculated heat and the electric quantity at the stage.
The advantages are that: because the energy storage system is in a normal temperature medium-low load working state at this moment, excessive equipment is not required to be started to perform excessive intervention on cooling and heat recovery of the energy storage system, and the external equipment such as a fan or a natural cooling mode is utilized to meet the normal operation conditions required by the all-vanadium redox flow battery reaction device, so that the input power and energy loss of the whole energy storage system can be reduced, and the power output efficiency of the energy storage system is improved.
Preferably, the system comprises a flow battery reaction device, a detection device, a heat management device for regulating the temperature of electrolyte and performing heat management, and a control device for regulating the operation mode of the whole system,
Preferably, the heat management device further comprises at least one electrolyte circulating pump, one end of the at least one electrolyte circulating pump is connected with the reactor in a flange manner, correspondingly, the other end of the at least one electrolyte circulating pump is respectively connected with the positive electrolyte storage tank or the negative electrolyte storage tank in respective circulating pipelines, and the heat management device is used for circulating and conveying electrolyte in the positive electrolyte storage chamber and the negative electrolyte storage chamber and the reactor in the oxidation-reduction reaction process of the whole vanadium redox flow battery system.
Preferably, the heat management device further comprises a condenser, wherein the downstream end of the condenser is connected with one side of a check valve in the flowing direction of the heat transfer fluid to the evaporator through a pipeline, the upstream end of the condenser is connected with a compressor pipeline controlled by the control device and is used for providing heat acquired from saturated liquid to a heat storage tank in the heat storage system, and the recovery management of the heat of the electrolyte is realized through a non-direct contact mode between a liquid heat storage medium pre-loaded in the heat storage tank and the heat of the electrolyte.
Preferably, the heat management device further comprises a heat exchanger, an output end of the heat exchanger located downstream of the electrolyte circulation flow from the reactor is connected with the positive electrolyte storage tank along the direction of the electrolyte circulation flow back to the storage tank, and an input end of the heat exchanger located upstream of the heat transfer fluid circulation flow is connected with the reactor, wherein a first heat exchange process in the electrolyte cooling process will occur in the heat exchanger, and the heat will be transferred to an evaporator of the heat transfer pipeline for further treatment through the form of the heat transfer fluid.
Preferably, the heat management device further comprises an evaporator, an output end of the evaporator located at a position downstream of circulating flow of the heat transfer fluid released from the heat exchanger is connected with the compressor controlled by the control device, an input end of the evaporator located at an upstream of circulating flow of the hot fluid is connected with the heat exchanger, a first electrolyte circulation pipeline of the positive electrolyte storage tank and a second electrolyte circulation pipeline of the negative electrolyte storage tank are parallel at the evaporator, and the evaporator is mainly used for absorbing heat released from the heat exchanger during the cooling circulation of the electrolyte and transmitting the heat to the compressor in a form of low-pressure steam for further treatment.
Preferably, the heat management device further comprises a compressor arranged on a circulating pipeline connected with the evaporator and the condenser, wherein an input end of the compressor, which is positioned at the upstream of a heat transfer fluid circulating pipeline released from the evaporator, is connected with the evaporator, an output end of the compressor, which is positioned at the downstream of the heat transfer fluid circulating pipeline, is connected with the condenser, the compressor is used as a power core of a refrigerating device in a heat storage system, is comprehensively started in a charging stage of the vanadium redox flow battery, the temperature and pressure of the low-temperature and/or low-pressure refrigerant vapor conveyed by the evaporator are increased by compressing the high-temperature vapor, the high-temperature vapor is conveyed into the condenser, the purpose of heat-work conversion is achieved, and the compressor is stopped after the vanadium redox flow battery enters a discharging stage.
Preferably, the control device further comprises a control valve arranged on a circulating pipeline connected with the evaporator and the condenser, wherein an input end of the control valve, which is positioned at the upstream of circulating flow of the heat transfer fluid released from the condenser, is connected with the non-return valve, and an output end of the control valve, which is positioned at the downstream of circulating flow, is connected with the expansion valve, and is used for controlling starting and stopping of the electrolyte heat exchanger and regulating the output power of the electrolyte heat exchanger according to the whole operation condition so as to realize cooling of the electrolyte and subsequent storage and utilization of the generated heat in the whole heat exchange process.
Preferably, the control device further comprises an expansion valve arranged between the evaporator and the control valve, wherein an input end of the expansion valve, which is positioned at the upstream of the circulating flow of the heat transfer fluid released from the condenser, is connected with the control valve, and an output end of the expansion valve, which is positioned at the downstream of the circulating flow, is connected with the evaporator, and is used for regulating the flow of the refrigerant entering the evaporator from the refrigerant inlet valve along the pipeline according to the change condition of the actual electric load after the pressure and the temperature of the saturated fluid or the supercooled fluid under the condensation pressure in the condenser or the liquid storage are reduced to the evaporation pressure and the evaporation temperature required under the corresponding working condition, thereby achieving the purpose of throttling.
Preferably, the control device further comprises a check valve arranged between the condenser and the control valve, wherein an input end of the check valve, which is positioned at the upstream of the circulating flow of the heat transfer fluid released from the condenser, is connected with the condenser, and an output end of the check valve, which is positioned at the downstream of the circulating flow, is connected with the control valve, and is mainly used for preventing the backflow of the refrigerating medium in the operation process of the cooling system and preventing the reverse rotation of the compressor driving motor.
Preferably, the control valve arranged between the evaporator and the condenser circulation pipeline in the heat management system is connected with a controller circuit outside the vanadium redox flow battery system, and the controller is used for controlling the start and stop of the control valve according to the temperature signal uploaded by the detection device, so that the circulation of the heat transfer fluid in the circulation pipeline is realized.
Preferably, the detecting device comprises a temperature measuring device, wherein the temperature measuring device is fixedly connected between a circulating pipeline at the outlet of the positive electrolyte storage tank and the inlet of the electrolyte circulating pump and is connected with an external controller circuit, and the temperature measuring device is responsible for collecting temperature change data of circulating electrolyte flowing through the device from the electrolyte storage tank to the inside of the reactor, and takes the data as a basis for controlling the starting of related equipment in the heat management device by the external controller.
Drawings
Fig. 1 is a schematic diagram of a system connection of a voltage equalization control method for an all-vanadium redox flow battery energy storage module device.
List of reference numerals
1. Reactor 2, positive electrode electrolyte storage tank
3. Negative electrode electrolyte storage tank 4 and electrolyte circulation pump
5. Heat pump unit 6 and heat exchanger
7. Temperature measuring device 8, control valve
9. Check valve 10 and evaporator
11. Condenser 12, compressor
13. Expansion valve 14 and heat storage device
15. External controller
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention relates to an energy storage module device for an all-vanadium redox flow battery and a voltage balance control method thereof, wherein the specific device of the method comprises the following steps of: the device comprises a detection device for detecting the charge and discharge states of the all-vanadium redox flow battery, a heat management device for performing temperature regulation on electrolyte and performing heat management, and an external controller for regulating the operation mode of the whole system. Specifically, the system comprises a reactor 1, a positive electrolyte storage tank 2, a negative electrolyte storage tank 3, an electrolyte circulating pump 4, a temperature measuring device 7, a heat pump unit 5, a heat storage device 14, necessary valves and pipelines and the like.
According to a preferred embodiment, the reaction device in the heat management system comprises, besides the vanadium redox flow battery reactor 1 mainly performing oxidation-reduction reaction, a positive electrode electrolyte storage tank 2 welded with an electrolyte circulation pump by utilizing a flange pipeline structure in the middle section of a positive electrode electrolyte circulation pipeline and a negative electrode electrolyte storage tank 3 welded with an electrolyte circulation pump by utilizing a flange pipeline structure in the middle section of a negative electrode electrolyte circulation pipeline, wherein the reaction device is connected to two sides of the vanadium redox flow battery reactor 1 through a circulation pipeline made of composite materials, and the positive electrode electrolyte storage tank 2 and the negative electrode electrolyte storage tank 3 are used for respectively holding positive electrode electrolyte and negative electrode electrolyte which participate in the oxidation-reduction reaction of the vanadium redox flow battery in advance.
In the operation process of the vanadium redox flow battery, an electrolyte circulating pump 4 which is connected with an electrolyte storage tank in a welding mode through a circulating pipeline is respectively arranged in the middle section of the circulating pipeline which is used for containing electrolyte and is used as a heat source of the electrolyte, wherein the positive electrode electrolyte storage tank 2 and the negative electrode electrolyte storage tank 3 are connected with the vanadium redox flow battery reactor 1 in a flange pipeline connection mode, and the electrolyte circulating pump is used for circulating and conveying electrolyte in the positive electrode electrolyte storage chamber and the negative electrode electrolyte storage chamber which are positioned at two sides of the vanadium redox flow battery reactor 1 and the vanadium redox flow battery reactor 1 in the oxidation-reduction reaction process of the whole vanadium redox flow battery system.
The temperature measuring device 7 which is used for containing the positive electrolyte and is used as a heat source is fixedly arranged on a circulating pipeline which is connected between an inlet of an electrolyte circulating pump and the positive electrolyte storage tank and is close to one side of the positive electrolyte storage tank at the downstream of a reaction area of the positive half-cell and is connected with an external controller circuit in a welding mode, and the temperature measuring device is used for measuring the temperature change condition of the electrolyte flowing through a circulating conveying pipeline of the device in the oxidation-reduction reaction process of the whole vanadium redox flow battery system in real time and is used as a basis for carrying out power regulation and heat management utilization on a core component of a cooling device in a subsequent heat storage system.
In the heat management system, a heat exchanger 6 as a core component of the cooling device is fixedly arranged on a circulating pipeline connected between a positive electrode electrolyte storage tank 2 and a vanadium redox flow battery reactor 1 at the upstream of a positive electrode half-battery reaction region by pipeline welding, and the type of the heat exchanger is preferably a shell-and-tube heat exchanger. The shell part liquid of the shell-and-tube heat exchanger is an electrolyte component to be treated, the inner tube part liquid is a refrigerant, and a plurality of groups of heat exchanger inner tubes containing the refrigerant are connected in parallel. The heat exchanger serves as a main heat treatment unit of the cooling device in the whole heat management system, which is mainly used for cooling the electrolyte, i.e. releasing heat absorbed from the electrolyte circulation cooling process to be supplied to the evaporator 10 in the whole heat pump unit 5.
Further, a heat exchanger 6 on the connection pipeline between the positive electrode electrolyte storage tank 2 and the vanadium redox flow battery reactor 1 at the upstream of the positive electrode half-battery reaction area is fixedly connected with an evaporator 10 of a heat pump system component in the heat pump unit 5 through a circulation pipeline, and the evaporator is mainly used for absorbing heat released from the heat exchanger 6 in the cooling circulation process of the electrolyte.
In the specific embodiment of the invention, besides the reaction mechanism necessary for the vanadium redox flow battery, the heat treatment in the whole redox reaction process of the vanadium redox flow battery mainly depends on two parts of the heat pump unit 5 and the heat storage device 14, and the continuous and effective management and utilization of the heat of the electrolyte of the vanadium redox flow battery system are realized through the heat exchange process between the heat pump unit 5 and the heat storage device 14.
The heat pump unit 5 specifically includes: an evaporator 10, an expansion valve 13, a control valve 8, a non-return valve 9, a condenser 11 and a compressor 12.
The evaporator 10 for absorbing heat released from the heat exchanger 6 during the electrolyte cooling cycle is in welded communication with a condenser 11 located in the heat pump system assembly for providing heat in a heat exchange manner to the heat storage device 14 via a circulation line.
On the one hand, when the cooling system in the heat management system is in an operating condition, a compressor 12 controlled by the control device is disposed on a circulation pipe, which connects the evaporator 10 and the condenser 11 at a position upstream of the cooling circulation system and is located on a side close to the condenser 11, by a structure such as a flange pipe. Specifically, the compressor is used as a power core of a refrigerating system, the compressor is fully started in the charging stage of the vanadium redox flow battery, the low-temperature low-pressure refrigerant vapor and/or low-pressure refrigerant vapor is compressed by the compressor to improve the temperature and the pressure of the low-temperature low-pressure refrigerant vapor, so that the heat-power conversion is realized, the purpose of refrigeration is achieved, and the compressor stops running after the vanadium redox flow battery enters the discharging stage.
On the other hand, a plurality of (for example, three) valves of different structures and functions are correspondingly arranged on the circulation pipeline connected between the evaporator 10 and the condenser 11 at the downstream of the whole cooling system, and the valves together form a control component of the heat pump unit, and the system control component is used for controlling the start and stop and output of each core component in the whole heat management process, correspondingly adjusting the specific operation conditions, and the like.
According to a preferred embodiment, a control valve 8 connected to an external controller circuit is provided in the cooling system control unit in the middle of a circulation pipe to which the evaporator 10 and the condenser 11 are connected by means of a flange pipe structure, and is connected to the refrigerant side of the heat exchanger and the heating refrigerant side of the condenser through the circulation pipe, respectively. The control valve is used for controlling the starting and stopping of the electrolyte heat exchanger and adjusting the output power of the electrolyte heat exchanger according to the whole operation condition, so as to realize the cooling of the electrolyte and the treatment and utilization of the generated heat in the whole heat exchange process.
In addition, an expansion valve 13 is disposed between the evaporator 10 and the circulation pipeline connected to the control valve 8, for example, by means of a flange pipeline structure, and the expansion valve adjusts the flow of the refrigerant flowing from the refrigerant inlet valve into the evaporator along the pipeline according to the change of the actual electric load after reducing the pressure and temperature of the saturated fluid or supercooled fluid in the condenser or the accumulator under the condensation pressure to the evaporation pressure and evaporation temperature required under the corresponding working condition, thereby achieving the purpose of throttling.
Further, a check valve 9 is provided in the cooling system control unit between the condenser 11 and the circulation pipe to which the control valve 8 is connected by means such as a flange pipe structure, and this check valve mainly prevents the reverse flow of the refrigerant medium during the operation of the cooling system and prevents the reverse rotation of the compressor driving motor.
Preferably, a shut-off valve is correspondingly arranged between the circulation pipeline connected with the check valve 9 and the control valve 8 through a flange pipeline structure, and it should be specially noted that although the control valve arranged between the circulation pipeline connected with the evaporator 10 and the condenser 11 can play a role in controlling the shut-off of the circulation pipeline, the shut-off valve can assist the control valve to start or stop a heat exchanger in a cooling system due to limited shut-off effect, so as to ensure the safety of the system and achieve the purposes of throttling and energy saving.
According to a preferred embodiment, the condenser 11, which is connected to the compressor 12 by means of a pipeline, upstream of the cooling system is connected by welding to a hot storage tank containing a heat storage medium, which is the main unit of the heat storage system in the heat management system, and the heat released in the condenser can be collected intensively by means of the heat storage medium, so that heat management is achieved for subsequent use.
The specific operation process of the system is described, specifically, when the reaction device in the whole system starts to work, namely, after the electrolyte circulating pump which is arranged on the electrolyte circulating pipeline which is used for containing electrolyte and is used as a heat source and is connected with the vanadium redox flow battery reactor by the welding mode is started, the reaction electrolyte in the positive electrode electrolyte storage tank and the negative electrode electrolyte storage tank is slowly conveyed into the circulating pipeline through the electrolyte circulating pump and enters the vanadium redox flow battery reactor along the pipeline, and the whole reaction device is communicated to start to normally operate.
Further, the detection device in the system detects the working state of the all-vanadium redox flow battery in real time, wherein the detection device is a battery management system BMS commonly used in battery systems in the field, when the detection device judges that the whole vanadium redox flow battery reaction device is in a charged state, the temperature measurement device 7 which is arranged on a circulating pipeline connected with an electrolyte circulating pump through a positive electrolyte storage tank in a pipeline welding mode and is positioned at the downstream of the positive half-battery reaction region will collect temperature information of electrolyte flowing through the temperature measurement device and flowing to the inside of the reactor from the positive electrolyte storage tank through a circulating pipeline, and the collected temperature information of the electrolyte is transmitted to an external controller connected in an electric connection mode, and the external controller starts a corresponding cooling device to cool the electrolyte in a charging stage according to the collected temperature information. In contrast, when the detection device determines that the vanadium redox flow battery reaction device is in a discharge state, the external controller will control the compressor to stop operating to interrupt the cooling action of the electrolyte.
When the external controller receives temperature data acquired by the temperature measuring device, a heat exchanger control valve which is arranged in the middle section of a circulating pipeline welded and connected with the electrolyte heat exchanger and the condenser through a flange pipeline structure and is connected with the external controller through a circuit in the heat pump unit is started, the control valve further starts the electrolyte heat exchanger which is positioned at the downstream of the circulating pipeline in the cooling device, particularly, shell side fluid of the electrolyte heat exchanger is electrolyte, tube side fluid is refrigerant, and the refrigerant is input to the tube side through a refrigerant inlet close to one side of the heat exchanger control valve, so that the cooling effect on the shell side electrolyte is realized in a heat exchange mode. In addition, the electrolyte heat exchanger is connected with an evaporator positioned at the downstream of the circulating pipeline of the heat pump unit, and the evaporator is mainly used for absorbing heat released from the heat exchanger in the process of cooling the electrolyte and transmitting the heat to a compressor positioned at the upstream of the circulating pipeline in a low-temperature and/or low-pressure steam mode for heating and/or boosting treatment.
In the charging state of the vanadium redox flow battery, a compression pump which is arranged at the upstream of a heat circulation pipeline through a flange pipeline structure is arranged at the middle section of the circulation pipeline which is connected with an electrolyte heat exchanger and a condenser in a welding way and is close to one side of the condenser is started through an external control device, specifically, the low-temperature and/or low-pressure refrigerant vapor conveyed by an evaporator is compressed by the compressor to improve the temperature and the pressure of the low-temperature and/or low-pressure refrigerant vapor, the low-temperature and/or low-pressure vapor is converted into relatively high-temperature and/or high-pressure vapor after being heated and/or boosted and enters the condenser along the heat circulation pipeline, low-temperature fluid in the condenser and the high-temperature vapor are subjected to indirect contact heat exchange, heat generated in the process is transferred into a heat storage tank of a heat storage device in a vapor mode, and a liquid heat storage medium in the heat storage tank is subjected to further heat management through physical contact of a non-liquid mixed flow mode.
According to the voltage balance control method for the energy storage module device of the all-vanadium redox flow battery, heat generated after electrolyte is cooled in the operation process of the redox flow battery is recovered, meanwhile, the main cooling stage is adjusted from the discharge state of the redox flow battery to the charge state, so that peak regulation load of the battery occupied by the discharge cooling stage of the redox flow battery is reduced, and the peak regulation load is transferred to grid valley electricity more, so that the peak regulation capacity of the energy storage system of the redox flow battery is improved. In the system, after primary heat exchange is carried out between the cooling device and the electrolyte, the generated heat is further stored in a heat storage tank containing a liquid heat storage medium in a heat storage device in a heat transfer fluid mode through a series of heat treatment units such as an evaporator, a compressor and a condenser, so that concentrated storage and conversion of the heat of the electrolyte are realized, and the proper electric quantity of the energy storage battery system under the corresponding working condition is determined by calculating the heat and combining the nonlinear relation between the heat and the electric quantity.
Preferably, the voltage balance control method for the energy storage module device of the all-vanadium redox flow battery provided by the invention can be applied to power systems such as an energy storage power station, a UPS (uninterrupted power supply) and the like which are built in occasions such as special geographic positions, peculiar terrains, large four-season temperature differences and large day-night temperature differences, and the like.
Furthermore, the heat storage device in the system can also recover the heat generated by other electronic power devices which are used for controlling the whole energy storage power station and/or the peak regulation base station to operate steadily in cooperation with the heat pump unit except the heat generated by the electrolyte circulation cooling stage in the heat pump unit by configuring the heat exchange device which is the same as the heat circulation pipeline of the all-vanadium redox flow battery reaction device and/or has a similar function, and the heat generated by the electronic power devices can be utilized by the same or similar application mode with the heat generated by the electrolyte circulation cooling stage, namely, the heat storage device in the heat management system can recover the heat generated by at least one other than the heat generated by the electrolyte in the whole all-vanadium redox flow battery energy storage system and/or a plurality of logic control units which are connected with the all-vanadium redox flow battery reaction device in a circuit and are used for controlling, outputting, regulating and the like of the energy storage system, so that the recovered heat is used for controlling the temperature of the whole all-vanadium redox flow battery energy storage system and external control, regulating, inputting and/or outputting devices.
According to a preferred embodiment, the start-stop and operation of the all-vanadium redox flow battery reaction device need a certain suitable external environment temperature to ensure the stable operation of the whole all-vanadium redox flow battery reaction device, the heat storage device in the all-vanadium redox flow battery energy storage system can carry out adaptive temperature adjustment on the all-vanadium redox flow battery reaction device in a dormant state through an external control device connected with the heat storage device in a circuit to meet the necessary starting condition allowed by the all-vanadium redox flow battery, specifically, the external controller measures an initial external environment temperature through an external environment temperature measuring device such as a thermometer and combines the internal working condition of the all-vanadium redox flow battery reaction device to establish the operation state of the all-vanadium redox flow battery reaction device, and if the all-vanadium redox flow battery reaction device is judged to be at a low temperature or an abnormal starting temperature, the external controller selectively decides whether to start the heat storage device and communicates with a heat circulation pipeline connected with the all-vanadium redox flow battery reaction device to implement the temperature adjustment on the all-vanadium redox flow battery reaction device to meet the adaptive starting condition.
Further, the temperature rise adjusting process is to perform stepwise adjustable heating according to the real-time variation value of the internal temperature and the external environment temperature of the all-vanadium redox flow battery reaction device and in combination with the current voltage and/or the power value in the electric power operation state, namely, when the all-vanadium redox flow battery reaction device is started and is in the normal operation state, the heat storage device conveys the heat recovered by the heat storage medium stored in the heat storage tank to the outer side of the device in the form of heat exchange fluid through the heat circulation pipeline, the temperature of the whole reaction device is adjusted in the form of not entering the all-vanadium redox flow battery reaction device, according to the real-time temperature variation condition, the temperature rise or the temperature regulation rate and time of each stage are obviously different, namely, when the all-vanadium redox flow battery reaction device is started for the first time in the low temperature state, the heating process of the reaction device is required to be performed for a long time by utilizing the heat fluid from the heat storage tank with larger flow, when the temperature of the reaction device is detected to reach a certain value, the heat storage device is combined with the working temperature adapted to the all-vanadium redox flow battery, the flow battery flow is adaptively reduced, the flow of the heat storage device is conveyed by the heat exchange fluid in the form of heat exchange fluid, and accordingly, the temperature of the heat storage device is regulated when the temperature of the all-vanadium redox flow battery is cut off from the whole vanadium redox flow battery reaction device reaches the required to the heat circulation device and the required to be connected with the heat circulation device when the all-vanadium redox flow battery device is connected to the heat storage device in the heat circulation device to the heat device and stable state when the temperature is controlled to the whole device and reaches the external device and stable to the temperature valve device.
According to a preferred embodiment, the energy storage module device for the all-vanadium redox flow battery and the voltage balance control method thereof provided by the invention can conduct targeted heat exchange adjustment according to the real-time reaction temperature of the positive electrode area at the side of the positive electrode half-battery area and the temperature difference change condition between the real-time reaction temperature of the negative electrode area measured by the temperature measuring device arranged in the negative electrode electrolyte storage tank or the negative electrode reaction chamber or the electrolyte circulation pipeline in the negative electrode half-battery area, calculate the heat generated in the heat exchange process and adjust the temperature by negative feedback, thereby obtaining proper electric quantity, and simultaneously realize the recycling of the heat generated in the positive electrode half-battery reaction area and the negative electrode half-battery reaction area under the condition that the input power of external electronic power equipment and/or the loss power of each power equipment in the actual power operation condition are as low as possible, and realize selective recycling of the heat while avoiding the low heat recycling efficiency of the whole energy storage system under the high-power high-load operation condition, and further realize selective recycling of the heat, thereby realizing great economic significance in terms of energy input and output.
Further, as the reaction depth in the positive half-cell reaction chamber is increased, insoluble precipitate generated by side reaction in the positive half-cell reaction chamber is continuously accumulated, and electrolyte stored in the positive electrolyte storage tank is gradually attached to the vicinity of a circulation pipeline and/or in the positive half-cell reaction chamber along with the circulation flow between the electrolyte storage tank and the positive half-cell reaction chamber of the reactor, as the temperature change condition of the accumulated positive half-cell reaction region of the precipitate in the actual reaction process is not easily determined, a larger deviation can exist by carrying out heat exchange adjustment on the fluctuation temperature; on the other hand, because similar precipitate is not generated in the reaction area of the cathode half-cell along with the continuous progress of the reaction, the temperature measuring device can be arranged in the cathode electrolyte storage tank or the cathode reaction chamber or the electrolyte circulation pipeline of the reaction area of the cathode half-cell to pre-measure a more visual and accurate reaction temperature value compared with the reaction area of the anode half-cell, and then, according to the measured actual temperature value of the reaction area of the cathode half-cell, the real-time measured power operation load of the reaction system of the all-vanadium redox flow battery, the current and/or voltage value of the charge-discharge circulation stage, the relevant necessary parameters such as the volume and specific heat of the electrolyte in the reaction system which participate in the redox reaction and pass through the electrolyte circulation cooling stage, and the like, the actual reaction temperature value of the reaction area of the anode half-cell can be obtained through an empirical formula obtained through a limited number of experiments and/or a comparison experiment data curve, the mathematical relationship between heat and temperature can be judged through the empirical formula and/or a comparison experiment data curve, and finally, the temperature of the whole all-vanadium flow battery reaction device can be subjected to specific temperature adjustment and heat recovery.
According to a preferred embodiment, due to objective reasons such as regional environmental temperature and/or equipment factors, subjective reasons such as manual operation control, and the like, multiple working conditions may exist in the all-vanadium redox flow battery reaction device during actual operation, it is obviously necessary to obtain a proper electric quantity value by performing targeted heat exchange adjustment according to different operation working conditions, specifically, the actual reaction temperature value of the positive electrode half-battery reaction region is obtained by calculation according to the actual measured temperature value of the negative electrode half-battery reaction region, the actual operation load condition of the all-vanadium redox flow battery reaction system is determined by combining the current and/or voltage values of the all-vanadium redox flow battery reaction system during operation, the external controller determines the operation state of the all-vanadium redox flow battery reaction device according to the electrolyte temperature, the external environmental temperature, the power and/or the load condition, performs temperature adjustment on the reaction device in the energy storage system through the related heat exchange equipment in the heat pump unit 5, and determines the proper electric quantity according to the nonlinear relation between heat and electric quantity through the external controller. Therefore, in the present invention, it is necessary to provide a necessary empirical numerical table in advance, and control is performed based on the empirical numerical table.
According to a preferred embodiment, when the external controller receives the real-time temperature information of the external environment and the electrolyte and combines the real-time current voltage and/or power and load value to determine that the vanadium redox flow battery reaction device is in a low-temperature low-load operation state, because the external environment temperature is lower, the operation environment of each heat exchange device on the heat circulation pipeline in the whole heat management system is poorer, if the corresponding heat exchange device is difficult to start at this time, the power consumption after the device is started is larger, the heat exchange and heat recovery efficiency is relatively poorer, the power generation condition after the device is also optimistic, and the starting of the control valve 8 positioned in the heat circulation pipeline can be controlled by the external controller in consideration of the fact that the temperature difference range of the positive half battery reaction area and the negative half battery reaction area under the low load condition is smaller, the heat exchanger 6 is further started and electrolyte circulation pipelines which are positioned at two sides of the heat exchanger and respectively connected with the positive electrolyte storage tank and the negative electrolyte storage tank in an on-off manner are communicated, so that the mutual cooling heat exchange of the positive electrolyte storage chamber and the electrolyte in the negative electrolyte storage chamber in the reaction system of the all-vanadium redox flow battery is realized, namely, one of the positive electrolyte and the negative electrolyte with relatively higher temperature enters the shell side, the other one with lower temperature enters the tube side, and after the heat exchange is finished, the other one returns to the respective electrolyte storage tank through the respective circulation pipeline to continuously participate in the electrolyte circulation process required by redox reaction of the redox flow battery, the heat exchange mode does not need to introduce external heat exchange media to participate in the heat exchange process, the self-heating utilization of the electrolyte can be realized without starting all heat exchange equipment in the heat circulation pipeline, the situation that the electrolyte is not coated and further resource waste is caused is avoided, meanwhile, heat is calculated according to parameters such as electrolyte temperature, power and running time, and proper generated energy under the working condition is determined by utilizing the heat.
According to a preferred embodiment, when the external controller receives the real-time temperature information of the external environment and the electrolyte and combines the real-time current voltage and/or power and load value to determine that the vanadium redox flow battery reaction device is in a high-temperature high-load operation state, the temperature difference measured by the positive half-battery reaction area and the negative half-battery reaction area is larger, the external controller can drive corresponding heat exchange equipment in the heat pump unit according to the specific temperature difference value of the positive half-battery reaction area and the negative half-battery reaction area and the environment temperature to implement personalized cooling circulation heat exchange and heat recovery management process for the positive half-battery reaction area and the negative half-battery reaction area in the whole vanadium redox flow battery reaction device, when the reaction temperature of one of the positive half-battery reaction area and the negative half-battery reaction area is significantly higher than the other, the heat exchange equipment in the heat pump unit can be started by the external controller to carry out the cooling circulation heat exchange and heat recovery process for the high Wen Fang, meanwhile, the temperature value of the other party is detected in real time, before or when the real-time reaction temperature value of the high Wen Fang reaches the adaptive temperature range, whether the electrolyte circulation pipeline or the heat circulation pipeline which is positioned on the side of the heat exchanger 6 and is different from the high Wen Fang and is connected with the electrolyte storage tank is selectively determined by the external controller according to the real-time temperature value of the other party so as to implement the cooling circulation heat exchange and heat recovery process, the reaction temperature value which is adaptive to the all-vanadium redox flow battery is still used as a standard, if the temperature value of the other party is higher and has larger deviation from the adaptive temperature, the heat circulation pipeline is communicated and the same cooling circulation heat exchange and heat recovery process with the high Wen Fang is carried out, the electrolyte in at least one part of the positive half-cell reaction area and/or the negative half-cell reaction area can be subjected to cooling circulation and heat management, and meanwhile, heat is calculated according to parameters such as electrolyte temperature, power and running time, and the proper generated energy under the working condition is determined by utilizing the heat.
According to a preferred embodiment, when the external controller receives the ambient temperature and electrolyte temperature information and combines the real-time current voltage and/or power and load value to determine that the all-vanadium redox flow battery reaction device is in a normal temperature medium-low load or normal load operation state, the actual reaction state difference between the positive half-battery reaction region and the negative half-battery reaction region is not large, and the ambient operation environment temperature where the reaction device is located is still available, the external controller operates the start of the control valve 8 in the heat circulation pipeline to start the heat exchanger 6, and communicates the electrolyte circulation pipelines which are respectively connected with the positive electrolyte storage tank and the negative electrolyte storage tank on both sides of the heat exchanger, so as to realize the mutual cooling heat exchange of the electrolytes in the positive electrolyte storage chamber and the negative electrolyte storage tank in the all-vanadium redox flow battery reaction system, and in the subsequent heat recovery process, the normal operation conditions required by the all-vanadium redox flow battery reaction device can be met by using external equipment such as fans or natural cooling without starting other heat exchange equipment in the heat pump set, the input power and energy loss of the whole energy storage system can be reduced, the heat loss can be reduced, the temperature can be adjusted only by using the electrolyte circulation pipeline which is suitable for the heat recovery time, the heat recovery time and the temperature can be determined according to the heat recovery time, and the heat recovery parameters are not suitable.
According to a preferred embodiment, a method for calculating heat in a voltage balance control method for an energy storage module device of an all-vanadium redox flow battery is provided:
s1, before starting battery charging, determining an initial temperature T1 of electrolyte and an initial temperature T1 of a hot storage tank;
s2, before the battery is charged, the actual temperature t2 of the electrolyte is determined;
s3, determining the final temperature T3 of the electrolyte and the final temperature T3 of the hot storage tank when the battery is discharged;
s4, according to a heat calculation formula, respectively obtaining heat Q1 generated in the battery charging and discharging process, heat Q2 recovered in a heat storage tank and a final generated heat quantity difference delta Q, wherein the formula is as follows:
Q= CV△t ；
s5: judging the recovery efficiency of the heat storage system according to the heat difference DeltaQ, and regulating the power of each heat circulation device in the heat pump unit through the control device;
s6: and according to the nonlinear relation between the heat and the electric quantity, combining an empirical numerical table and referring to related parameters to determine the proper electric quantity under each working condition.
It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (6)
1. The heat control method for the all-vanadium redox flow battery is capable of controlling the working condition of the all-vanadium redox flow battery through an external controller, and is characterized in that the external controller carries out heat exchange adjustment on the all-vanadium redox flow battery under different working conditions according to the heat generation amount, and the heat generation amount is determined by the external controller according to the real-time power generation amount of an all-vanadium redox flow battery system;
if the external controller judges that the all-vanadium redox flow battery is in a low-temperature and/or low-load working state according to the data set, starting corresponding heat exchange equipment to perform a self-heat exchange circulation process of the electrolyte in the positive half-battery reaction area and the electrolyte in the negative half-battery reaction area in the reaction system without heat recovery;
if the external controller judges that the all-vanadium redox flow battery is in a high-temperature and/or high-load working state according to the parameters, corresponding heat exchange equipment is started to perform cooling circulation and heat recovery on the electrolyte in at least a part of the positive half-battery reaction area and/or the negative half-battery reaction area;
if the external controller judges that the all-vanadium redox flow battery is in a normal temperature medium-low load and/or normal load working state according to the parameters, at least one heat exchange device in the heat pump unit is started or a natural cooling mode is adopted without starting to meet the operation conditions required by the all-vanadium redox flow battery reaction device, and heat recovery is not performed.
2. A system for the heat control method of the all-vanadium redox flow battery of claim 1.
3. The system according to claim 2, characterized in that it comprises a heat exchanger (6), said heat exchanger (6) being fixedly arranged by means of pipe welding on a circulation line connected between a positive electrolyte storage tank (2) and a vanadium redox flow battery reactor (1) upstream of the positive half-cell reaction zone.
4. A system according to claim 3, characterized in that the system comprises a control valve (8) connected with an external controller circuit, the heat exchanger (6) is fixedly connected with an evaporator (10) of a heat pump system component in the heat pump unit (5) through a circulation pipeline, and the control valve (8) is arranged in the middle section of the circulation pipeline where the evaporator (10) and the condenser (11) are welded and connected with the refrigeration working medium side of the heat exchanger (6) and the heating working medium side of the condenser (11) through the circulation pipeline respectively.
5. The system according to claim 4, wherein the external controller operates the start of the control valve (8) in the heat circulation pipeline, so as to start the heat exchanger (6) and communicate the electrolyte circulation pipelines which are positioned at two sides of the heat exchanger (6) and are respectively connected with the positive electrolyte storage tank (2) and the negative electrolyte storage tank (3) in an on-off manner, so as to realize the mutual cooling and heat exchange of the electrolyte in the positive electrolyte storage chamber and the negative electrolyte storage chamber inside the all-vanadium redox flow battery reaction system.
6. The system according to claim 5, wherein the heat exchanger (6) is a shell-and-tube heat exchanger, the shell portion liquid of the shell-and-tube heat exchanger is an electrolyte component to be treated, the inner tube portion liquid is a refrigerant, one of the positive electrolyte and the negative electrolyte, which has a relatively higher temperature, enters the shell side, the other one of the positive electrolyte and the negative electrolyte, which has a lower temperature, enters the tube side, and after heat exchange, the other one of the positive electrolyte and the negative electrolyte returns to the respective electrolyte storage tanks through the respective circulation pipelines to continue to participate in the electrolyte circulation process required by the redox reaction of the flow battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496184.XA CN114824374B (en) | 2020-12-21 | 2021-01-27 | Temperature control device for all-vanadium redox flow battery |
Applications Claiming Priority (4)
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| CN117497806B (en) * | 2024-01-02 | 2024-04-09 | 湖南省银峰新能源有限公司 | Temperature control method and device for energy storage system of all-vanadium redox flow battery |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007188730A (en) * | 2006-01-12 | 2007-07-26 | Kansai Electric Power Co Inc:The | Heat utilization system |
| CN203466259U (en) * | 2013-09-29 | 2014-03-05 | 中国科学院大连化学物理研究所 | All-vanadium redox flow battery system |
| CN107732269A (en) * | 2017-11-27 | 2018-02-23 | 大连热电新能源应用技术研究院有限公司 | The residual neat recovering system and all-vanadium flow battery cooling means of all-vanadium flow battery |
| CN107819140A (en) * | 2017-11-27 | 2018-03-20 | 大连热电新能源应用技术研究院有限公司 | All-vanadium redox flow battery system and its cooling means |
| CN207490019U (en) * | 2017-11-27 | 2018-06-12 | 大连热电新能源应用技术研究院有限公司 | The residual neat recovering system of all-vanadium flow battery |
| CN207637905U (en) * | 2017-11-27 | 2018-07-20 | 大连热电新能源应用技术研究院有限公司 | All-vanadium redox flow battery system |
| CN109509898A (en) * | 2017-09-14 | 2019-03-22 | 大连融慧能源科技有限公司 | Heat recovery system and recovery method suitable for flow battery |
| CN109841927A (en) * | 2019-03-01 | 2019-06-04 | 华南理工大学 | Electric automobile power battery heat management device suitable for extremely frigid zones |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8277964B2 (en) * | 2004-01-15 | 2012-10-02 | Jd Holding Inc. | System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system |
| CN202444018U (en) * | 2012-03-06 | 2012-09-19 | 北京百能汇通科技股份有限公司 | Liquid flow battery system with residual energy recycling device |
| US20130316199A1 (en) * | 2012-05-25 | 2013-11-28 | Deeya Energy, Inc. | Electrochemical balance in a vanadium flow battery |
| CN102983379B (en) * | 2012-12-04 | 2015-07-22 | 中国科学院金属研究所 | Method for preparing vanadium pentoxide from ineffective electrolyte for vanadium battery |
| CN106257725B (en) * | 2016-01-28 | 2018-05-22 | 中国科学院过程工程研究所 | A kind of system and method for preparing the specific valence state electrolyte of high activity all-vanadium flow battery |
| US11171350B2 (en) * | 2016-03-14 | 2021-11-09 | Dalian Rongkepower Co., Ltd | Flow battery control method, flow battery control system and flow battery |
| US10396375B2 (en) * | 2016-03-24 | 2019-08-27 | International Busniess Machines Corporation | System and method for condition monitoring of redox flow batteries using data analytics |
| CN107507994A (en) * | 2017-08-11 | 2017-12-22 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of all-vanadium flow battery energy-storage module device and its voltage balance control method |
| NL2019649B1 (en) * | 2017-09-29 | 2019-04-08 | Univ Delft Tech | Redox flow battery for heat to power conversion |
| CN108023107B (en) * | 2017-12-01 | 2019-11-12 | 大连融科储能装备有限公司 | A kind of flow battery system and its method of operation of automatic restorability |
| CN111261888A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Recycling method of all-vanadium redox flow battery electrode material |
| CN110429299A (en) * | 2019-08-09 | 2019-11-08 | 上海电气集团股份有限公司 | The control method and system of the electrolyte temperature of flow battery |
| CN111049136B (en) * | 2019-12-31 | 2023-11-24 | 青海能高新能源有限公司 | Electric/thermal/cold triple-storage comprehensive energy system and method |
| JP7039660B2 (en) * | 2020-07-22 | 2022-03-22 | ケーディー イノヴェイション リミテッド | Electrochemical system for direct power generation and thermal pumping |
-
2021
- 2021-01-27 CN CN202210496184.XA patent/CN114824374B/en active Active
- 2021-01-27 CN CN202110116179.7A patent/CN112952158B/en active Active
- 2021-01-27 CN CN202210496183.5A patent/CN114883612A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007188730A (en) * | 2006-01-12 | 2007-07-26 | Kansai Electric Power Co Inc:The | Heat utilization system |
| CN203466259U (en) * | 2013-09-29 | 2014-03-05 | 中国科学院大连化学物理研究所 | All-vanadium redox flow battery system |
| CN109509898A (en) * | 2017-09-14 | 2019-03-22 | 大连融慧能源科技有限公司 | Heat recovery system and recovery method suitable for flow battery |
| CN107732269A (en) * | 2017-11-27 | 2018-02-23 | 大连热电新能源应用技术研究院有限公司 | The residual neat recovering system and all-vanadium flow battery cooling means of all-vanadium flow battery |
| CN107819140A (en) * | 2017-11-27 | 2018-03-20 | 大连热电新能源应用技术研究院有限公司 | All-vanadium redox flow battery system and its cooling means |
| CN207490019U (en) * | 2017-11-27 | 2018-06-12 | 大连热电新能源应用技术研究院有限公司 | The residual neat recovering system of all-vanadium flow battery |
| CN207637905U (en) * | 2017-11-27 | 2018-07-20 | 大连热电新能源应用技术研究院有限公司 | All-vanadium redox flow battery system |
| CN109841927A (en) * | 2019-03-01 | 2019-06-04 | 华南理工大学 | Electric automobile power battery heat management device suitable for extremely frigid zones |
Non-Patent Citations (1)
| Title |
|---|
| 一种全钒液流电池组的SOC均衡控制方案;郑涛;桂少婷;李鑫;盛婷婷;魏达;;电源技术(01);全文 * |
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| CN114824374A (en) | 2022-07-29 |
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