CN102110829A - System and method for allowing flow battery energy storage system to safely operate - Google Patents
System and method for allowing flow battery energy storage system to safely operate Download PDFInfo
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- CN102110829A CN102110829A CN2010106067844A CN201010606784A CN102110829A CN 102110829 A CN102110829 A CN 102110829A CN 2010106067844 A CN2010106067844 A CN 2010106067844A CN 201010606784 A CN201010606784 A CN 201010606784A CN 102110829 A CN102110829 A CN 102110829A
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Abstract
The invention discloses a system (400) and a method (500) for allowing an all-vanadium redox flow battery energy storage system (10) to safely operate at low temperature. By detecting electrolyte temperature, the all-vanadium redox flow battery energy storage system (10) is forced to charge and discharge at low temperature, so that the all-vanadium redox flow battery energy storage system (10) protects various pipes of the all-vanadium redox flow battery energy storage system (10) by utilizing heat generated in the charging and discharging process so as to prevent the all-vanadium redox flow battery energy storage system (10) from being damaged at low temperature.
Description
Technical field
Present invention relates in general to the energy storage system, relate in particular to the system and method that makes flow battery energy storage system safety operation at low temperatures.
Background technology
Flow battery energy storage system such as vanadium redox battery energy storage system (VRB-ESS) has been subjected to widely and has paid close attention to, because their promise expenses are cheap and have many advantages such as life-span length, flexible design, stability height and a lower operation and maintenance cost.VRB-ESS comprises having by the anode of membrane separation and a plurality of monocells of catholyte.
Adopt electrolyte the same as the flow battery energy storage system that transports medium of energy storage with great majority, VRB-ESS depends on the pump streaming system so that anode and catholyte flow through pile.In the flow battery energy storage system of operation as VRB-ESS, the charging of vanadium cell or battery and discharge can produce heat, and these heat can be used to safeguard the temperature of energy storage system.Yet for the wind turbine generating and the solar power plant that are furnished with flow battery energy storage system such as VRB-ESS, flow battery energy storage system such as VRB-ESS are to be in idle state at part-time.On the other hand, because wind turbine power plant and solar power plant can be positioned at comparatively cold place, when the energy storage system did not work, cold weather tended to the pipeline that is used for conveying electrolyte of freezing this system, thereby energy storage system was lost efficacy.Therefore, provide that to make the system and method that flow battery energy storage system such as VRB-ESS can safe operation in the area of cold climate will be that one of prior art is improved greatly.
Summary of the invention
According to an aspect of the present invention, a kind of system of safe operation at low temperatures of flow battery energy storage system that makes is provided, described system comprises: the charging circuit with at least two circuit pathways that can be electrically connected to external power source, have a circuit pathways of under having the situation of at least two different external power sources, guaranteeing to have only in the same time in the charging circuit and be communicated with, be used for described flow battery energy storage system is charged only to connect an external power source function; Discharge circuit is used for the electric energy of described flow battery energy storage system is carried to load; The electrolyte temperature transducer is used to detect the temperature of anode and catholyte; Controller; it is connected with the electrolyte temperature sensor electrical to gather and the relevant service data of described energy storage system by the monitor communication interface; and by control communication interface and charging circuit; discharge circuit and described energy storage system are electrically connected; controller control and when monitoring the operation of described energy storage system and judging that according to the data of electrolyte temperature sensor acquisition electrolyte temperature is lower than first predetermined temperature threshold; described controller makes described flow battery energy storage system utilize external power source and load to discharge and recharge, thereby the heat that the utilization of described energy storage system is produced in charge and discharge process is protected each pipeline of its conveying electrolyte.
According to another aspect of the present invention, a kind of system of safe operation at low temperatures of flow battery energy storage system that makes is provided, described system comprises: the charging circuit with at least two circuit pathways that can be electrically connected to external power source, have a circuit pathways of under having the situation of at least two different external power sources, guaranteeing to have only in the same time in the charging circuit and be communicated with, be used for described flow battery energy storage system is charged only to connect an external power source function; Discharge circuit is used for the electric energy of described flow battery energy storage system is carried to load; The electrolyte temperature transducer is used to detect the temperature of anode and catholyte; Environment temperature sensor is used for the temperature of testing environment; Controller; it is electrically connected to gather and the relevant service data of described energy storage system with electrolyte temperature transducer and environment temperature sensor by the monitor communication interface; and by control communication interface and charging circuit; discharge circuit and described energy storage system are electrically connected; controller control and monitor the operation of described energy storage system and judge that according to the data of electrolyte temperature sensor acquisition electrolyte temperature is lower than first predetermined temperature threshold; and when judging that according to the data of environment temperature sensor collection ambient temperature is lower than the ambient temperature threshold value; described controller makes described flow battery energy storage system utilize external power source and load to discharge and recharge, thereby the heat that the utilization of described energy storage system is produced in charge and discharge process is protected each pipeline of its conveying electrolyte.
Wherein, described flow battery energy storage system is a vanadium redox battery energy storage system.
Wherein, described flow battery energy storage system comprises two or more subsystems, when described charging circuit charged for a flow battery energy storage subsystem, described discharge circuit was used for the electric energy of another flow battery energy storage subsystem is carried to described load.
Wherein, described charging circuit comprises: commutation circuit, have at least two circuits that can be electrically connected to external power source, have and under the situation that has two external power sources, guarantee that its inner circuit has only a circuit to be communicated with to connect the function of an external power source in the same time at least; Be electrically connected to the charger of commutation circuit, alternating current is converted to direct current so that vanadium redox battery energy storage system is charged; Mains switch is used to be electrically connected charger and vanadium redox battery energy storage system.
Wherein, described commutation circuit comprises: first circuit is electrically connected to the signal of controller with reception control first relay by the first set of connections terminal, thereby controls switching on and off of first circuit pathways; Second circuit, be electrically connected to controller to receive the signal of control second relay by the second set of connections terminal, thereby switching on and off of control second circuit path, wherein, first circuit pathways be from first circuit of commutation circuit through commutation circuit, charger, mains switch, to the circuit of vanadium redox battery energy storage system, the second circuit path is through commutation circuit, charger, mains switch, to the circuit of vanadium redox battery energy storage system from second circuit of commutation circuit.
Wherein, described discharge circuit comprises: the DC/AC transducer, be connected to load, and will be converted to alternating current from the direct current of vanadium redox battery energy storage system; Load switch is used to connect vanadium redox battery energy storage system and DC/AC transducer.
Wherein, described charger and described DC/AC transducer are integrated into two way convertor.
Wherein, described external power source comprises first power supply and second source, first circuit pathways of described charging circuit is connected to first power supply, and its second circuit path is connected to second source, when described controller judges that according to the data of electrolyte temperature sensor acquisition electrolyte temperature is lower than first predetermined threshold, making flow battery energy storage system utilize external power source and load to discharge and recharge comprises: controller judges whether to use first power supply to charge for vanadium redox battery energy storage system, if can, the controller signal that first coil that makes first relay in the commutation circuit powers up that transmits control signal is connected thereby make from the circuit of first power supply to the first circuit pathways; If cannot, the controller signal that second coil of second relay that makes commutation circuit powers up that transmits control signal, thus the circuit from second source to the second circuit path is connected; Controller judges whether the capacitance of having stored of vanadium redox battery energy storage system has reached predetermined capacitance threshold values, if, controller makes not conducting of commutation circuit, and the disconnecting power switch and make the load switch closure of transmitting control signal makes vanadium redox battery energy storage system by DC/AC transducer powering load.
Wherein, described controller makes flow battery energy storage system carry out at low temperatures in the charging and discharging process further judging whether ambient temperature has risen reaches second predetermined temperature threshold and above preset time, if controller sends and finishes discharging and recharging of vanadium redox battery energy storage system at low temperatures.
Wherein, described external power source only comprises second source, first circuit pathways of described charging circuit is not attached to any power source, and its second circuit path is connected to second source, when described controller judges that according to the data of electrolyte temperature sensor acquisition electrolyte temperature is lower than first predetermined threshold, making flow battery energy storage system utilize external power source and load to discharge and recharge comprises: the controller signal that second coil of second relay that makes commutation circuit powers up that transmits control signal, thus the circuit from second source to the second circuit path is connected; Controller judges whether the capacitance of having stored of vanadium redox battery energy storage system has reached predetermined capacitance threshold value, if, controller makes not conducting of commutation circuit, and the disconnecting power switch and make the load switch closure of transmitting control signal makes vanadium redox battery energy storage system by DC/AC transducer powering load.
Wherein, described load is the electrolyte heater.
According to another aspect of the present invention, a kind of flow battery energy storage system method of safe operation at low temperatures that makes is provided, described method comprises: utilize electrolyte temperature sensor electrolyte temperature and send the data to controller, controller judges whether electrolyte temperature is lower than first temperature threshold; Be lower than first temperature threshold if determine electrolyte temperature, force described flow battery energy storage system to utilize external power source and load to discharge and recharge; System utilizes external power source and load to carry out in the charge and discharge process in the described flow battery energy storage of pressure, judge whether to receive the instruction that end forced fluid flow battery power storage system discharges and recharges, if, finishing flow battery energy storage system utilizes external power source and load to carry out charging and discharging process, if not, continue forced fluid flow battery power storage system and utilize external power source and load to discharge and recharge.
Wherein, if determine that electrolyte temperature is lower than first temperature threshold, forcing described flow battery energy storage system to utilize before external power source and load discharge and recharge, described method further comprises: described controller judges further whether ambient temperature is lower than the ambient temperature threshold value; When ambient temperature is lower than the ambient temperature threshold value, carries out the described flow battery energy storage of pressure system and utilize external power source and load to discharge and recharge.
Wherein, described flow battery energy storage system is an all-vanadium flow battery energy storage system.
Wherein, described flow battery energy storage system comprises two or more subsystems, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise: when described charging circuit charged for a flow battery energy storage subsystem, described discharge circuit was used for the electric energy of another flow battery energy storage subsystem is carried to described load.
Wherein, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise: charging circuit is connected, utilized external power source that all-vanadium flow battery energy storage system is charged; B) judge whether the electric energy stored in the all-vanadium flow battery energy storage system has reached the first predetermined capacitance threshold value, if electric energy stored does not reach the first predetermined capacitance threshold value, continue to utilize external power source that all-vanadium flow battery energy storage system is charged; C) if electric energy stored has reached the first predetermined capacitance threshold value, the disconnection charging circuit that transmits control signal, and the connection discharge circuit that transmits control signal externally discharge all-vanadium flow battery energy storage system; D) judge whether electric energy stored has dropped to the second predetermined capacitance threshold value in the all-vanadium flow battery energy storage system; E) if electric energy stored has dropped to the second predetermined capacitance threshold value, transmitting control signal disconnects the discharge circuit and the connection charging circuit that transmits control signal, and utilizes external power source that all-vanadium flow battery energy storage system is charged; F) if electric energy stored does not drop to the second predetermined capacitance threshold value, continue to make all-vanadium flow battery energy storage system externally to discharge.
Wherein, charging circuit is connected, the step of utilizing external power source that all-vanadium flow battery energy storage system is charged comprises: judge whether to use first power supply to charge for all-vanadium flow battery energy storage system; If of course, controller transmits control signal to make from first power supply and connects through commutation circuit, charger, mains switch, to the circuit of all-vanadium flow battery energy storage system; If cannot, controller transmits control signal to make from second source and connects through commutation circuit, charger, mains switch, to the circuit of all-vanadium flow battery energy storage system.
Wherein, described external power source only comprises second source, charging circuit is connected, and the step of utilizing external power source that all-vanadium flow battery energy storage system is charged comprises: controller transmits control signal to make from second source and connects through commutation circuit, charger, mains switch, to the circuit of all-vanadium flow battery energy storage system.
Wherein, make the charging circuit connection, before utilizing external power source that all-vanadium flow battery energy storage system is charged, further comprise step: judge whether the electric energy stored in the all-vanadium flow battery energy storage system has reached the first predetermined capacitance threshold value, if electric energy stored does not reach the first predetermined capacitance threshold value, proceed to step a),, proceed to step c) if electric energy stored has reached the first predetermined capacitance threshold value.
Wherein, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise: two way convertor will be converted to direct current from the alternating current of described external power source so that described flow battery energy storage system is charged; Described two way convertor will be converted to alternating current to offer described load from the direct current of described flow battery energy storage system.
Wherein, described load is the electrolyte heater.
According to a further aspect of the invention, a kind of flow battery energy storage system method of safe operation at low temperatures that makes is provided, described method comprises: utilize electrolyte temperature detector detection electrolyte temperature and send the data to controller, controller judges whether electrolyte temperature is lower than first temperature threshold; If determine that electrolyte temperature is lower than first temperature threshold, forced fluid flow battery power storage system utilizes external power source to charge; Judge whether to receive the instruction that end forced fluid flow battery power storage system is charged, if, finish the process that flow battery energy storage system utilizes external power source to charge, if not, continue forced fluid flow battery power storage system and utilize external power source to charge.
Wherein, described flow battery energy storage system is a vanadium redox battery energy storage system.
Wherein, described flow battery energy storage system comprises two or more subsystems, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise: when described charging circuit charged for a flow battery energy storage subsystem, described discharge circuit was used for the electric energy of another flow battery energy storage subsystem is carried to described load.
Wherein, described forced fluid flow battery power storage system is utilized external power source to charge to comprise: charging circuit is connected, utilized external power source that flow battery energy storage system is charged; Whether the charging of judging vanadium redox battery energy storage system has continued predetermined time value, if not, continue to utilize external power source that vanadium redox battery energy storage system is charged, if the disconnection charging circuit transmits control signal; Whether each ducted electrolyte temperature of judging vanadium redox battery energy storage system is lower than predetermined temperature value; If each ducted electrolyte temperature of vanadium redox battery energy storage system is lower than predetermined temperature value, the connection charging circuit that transmits control signal utilizes external power source that vanadium redox battery energy storage system is charged; If each ducted electrolyte temperature of vanadium redox battery energy storage system is not lower than predetermined temperature value, continue each ducted electrolyte temperature of monitoring vanadium redox battery energy storage system, each ducted electrolyte temperature up to vanadium redox battery energy storage system is lower than predetermined temperature value, the connection charging circuit that transmits control signal utilizes external power source that vanadium redox battery energy storage system is charged.
Wherein, charging circuit is connected, utilized external power source that flow battery energy storage system is charged and comprise: judge whether to use first power supply to charge for vanadium redox battery energy storage system; If of course, controller transmits control signal to make from first power supply and connects through commutation circuit, charger, mains switch, to the circuit of vanadium redox battery energy storage system; If cannot, controller transmits control signal to make from second source and connects through commutation circuit, charger, mains switch, to the circuit of vanadium redox battery energy storage system.
Description of drawings
Fig. 1 is the block diagram of the vanadium cell energy storage system that uses with system and method for the present invention.
Fig. 2 is the block diagram according to the system of the VRB-ESS of making safe operation of the present invention.
Fig. 3 is the embodiment block diagram according to controller of the present invention.
Fig. 4 is the block diagram according to commutation circuit of the present invention.
Fig. 5 is the method according to the VRB-ESS of making safe operation of the present invention.
Fig. 6 is the flow chart of the concrete implementation step that discharges and recharges according to pressure according to the present invention VRB-ESS 10.
Embodiment
Various aspects of the present invention describe in conjunction with the drawings set forth clear.
Fig. 1 shows the block diagram of the VRB-ESS 10 that uses with the preferred embodiments of the present invention.Remote energy source system applies for photovoltaic array or wind turbine generator power supply requires to have suitable energy storage system.For these application, low-cost and operation simply is topmost requirement.Adopt electrolyte the same as the energy storage system of the medium that transmits electric energy with great majority, VRB-ESS 10 also can be used to store the electric energy that photovoltaic array or wind turbine generator etc. produce.
Can be according to United States Patent (USP) 4,786,567,6,143,443,6,468,688 and 6,562,514 instruction or other technologies known in the art are made anode and catholyte 22,24.Anolyte 22 refers to the electrolyte of the redox ion that includes regulation, these redox ions are in goes back ortho states and oxidized in the process of redox cell discharge, perhaps be in oxidation state and in the charging process of redox cell, be reduced, or the mixture of ions that are reduced after these and ion to be restored.Catholyte 24 refers to the electrolyte of the redox ion that includes regulation, these redox ions are in oxidation state and are reduced in the process of redox cell discharge, perhaps be in and go back ortho states and oxidized in the process of redox cell charging, or these already oxidised ions and the mixture for the treatment of the ion of oxidation.
Each monocell 12 comprises the ionic conduction separator 26 that places between anodal and the negative compartment 14,18, and ionic conduction separator 26 connects so that ion to be provided betwixt with anode and catholyte 22,24 contacts.Separator 26 is as amberplex.
Similarly, other catholyte 24 is retained in the negative electrode fluid reservoir 46, and the negative electrode fluid reservoir is by negative electrode supply line 48 and negative electrode return line 50 and positive compartment 18 circulations.Negative electrode supply line 48 and pump 54 and heat exchanger 56 UNICOMs.Variable speed pump 54 makes catholyte 24 can flow through negative electrode fluid reservoir 46, supply line 48, positive compartment 18 and return line 50.Supply line 48 comprises supply line valve 60, and return line 50 comprises return line valve 62.
Negative pole and anode electrode 16,20 are electrically connected with external power source 64 and user 66.Mains switch 68 places between external power source 64 and each negative electrode 16.Equally, load switch 70 places between user 66 and each negative electrode 16.Those of ordinary skills can expect that the structure of other replacement also is fine, and the example of Fig. 1 just is used to illustrate.
In charging process, mains switch 68 closures and load switch 70 disconnect.Pump 36 makes anolyte 22 flow through negative compartment 14 and anode fluid reservoir 28 through anode supply and return line 30,32.Simultaneously, pump 54 makes catholyte 24 flow through positive compartment 18 and negative electrode fluid reservoir 46 through negative electrode supply line and return line 48,50.By being delivered to negative pole and anode electrode 16,20 from power supply 64, electric energy makes each monocell charging.Divalent vanadium ion in the electric energy driving anolyte 22 and the pentavalent vanadium ion in the catholyte 24.
By closed load switch 70 and disconnecting power switch 68, power taking from monocell 12.This makes and the user 66 of negative pole and anode electrode 16,20 electrical connections obtains electric energy.Although do not illustrate, can comprise power conversion system is AC power supplies with the DC power source conversion.
According to the present invention, mains switch 68 and load switch 70 are parts independently.But, alternatively, mains switch 68 and load switch 70 also as required design and installation be the part of system 10.
The present invention is not limited to VRB-ESS.In fact, for any type of flow battery energy storage system, can use system and method for the present invention.Hereinafter, for ease of explanation, preferred embodiment provides the system and method in conjunction with VRB-ESS.
Fig. 2 shows the system 400 that makes flow battery energy storage system (preferably VRB-ESS) safe operation of the present invention.System 400 comprises commutation circuit 300 and charger 302.Commutation circuit 300 and charger 302 use the electric energy of external power source that VRB-ESS 10 is charged under the control of controller 200.In this manual, external power source refers to (but being not limited to) power plant 308 or electrical network 310, and the power plant can be the wind turbine generating, photovoltaic array, solar power generation etc.Among the present invention, the power plant is called first power supply, and electrical network is called second source.Replacedly, if use other power supply to replace power plant of the present invention, then these other power supply is also referred to as first power supply.Charger 302 can be transformed into the AC power supplies of power plant or electrical network the DC power supply.When giving VRB-ESS 10 chargings, commutation circuit 300 has interlock function, can guarantee only can connect to charge from a circuit in power plant 308 and the electrical network 310.According to the present invention, commutation circuit 300, charger 302 and mains switch 68 constitute charging circuit, and this charging circuit has at least two circuit pathways, to connect at least two external power sources respectively.As mentioned below, in this charging circuit can be guaranteed at one time, have only one tunnel circuit pathways to connect the interlock function of external power source.Those of ordinary skills can understand, and charging circuit is not limited to the foregoing circuit structure, and the charging circuit of other topological structure also is to be applied to the present invention.Be provided with switch 306 between power plant 308 and electrical network, can't be with the power storage of power plant 308 in VRB-ESS 10 or the electric energy in power plant 308 directly need be supplied with electrical network 310 time, controller 200 sends a signal to switch 306 and makes its closure.Alternatively, power plant 308 also can only be connected to commutation circuit, and is not connected with electrical network 310, thereby does not also need switch 306.
System 400 also comprises DC/AC transducer 304.VRB-ESS 10 powers to electrical network 310 power supplies or to load 312 by DC/AC transducer 304.According to the present invention, load can be any type of load, for example, can be power consumption equipment, various types of energy storage devices, and electrical network 310 also can be used as the load of flow battery energy storage system; The electrolyte heater also can be used as the load of flow battery energy storage system, and the electrolyte heater is adopted in load, makes that the energy in the input VRB-ESS106 is used for the electrolyte heating, thus the total output demand of reduction system 400.In this manual, load switch 70 and DC/AC transducer 304 constitute discharge circuit.Those of ordinary skills can understand, and discharge circuit is not limited to the foregoing circuit structure, and the discharge circuit of other topological structure also is to be applied to the present invention.Switch 68 is arranged between charger 302 and the VRB-ESS 10, and switch 70 is arranged between VRB-ESS 10 and the DC/AC transducer 304.
Charger 302 and DC/AC transducer 304 can independently be provided with, and also can be integrated into a two way convertor, make system structurally more compact.
System 400 comprises controller 200, and it controls communication interface 214 and each parts of system 10 and the switch 306 of system 400 by one, commutation circuit 300, and charger 302 is electrically connected, and interface 214 can utilize and use the RS485 of MODBUS agreement to realize.Controller 200 is anode and cathode temperature transducer 220a by monitor communication interface 218 with environment temperature sensor 222, electrolyte temperature transducer also, 220b is electrically connected, gather and described energy storage system's relevant service data, especially electrolyte temperature and ambient temperature data to receive.According to the present invention, environment temperature sensor 222 is optional.Under the situation that only data by the electrolyte temperature sensor acquisition determine whether VRB-ESS 10 is discharged and recharged in the present invention, can save environment temperature sensor.According to system 400 of the present invention, under the control of controller 200, can under low temperature condition, utilize the power supply of second source (electrical network) or first power supply (power plant) to force to make VRB-ESS10 work, the heat that produces when utilizing system 10 itself to move is kept the temperature of system 10, thereby has avoided the pipeline bursting by freezing at low temperatures of system 10.
Further, flow battery energy storage system can also adopt the mode of two or more subsystems to realize, charging circuit charges to each flow battery energy storage subsystem respectively, and discharge circuit is used for respectively the electric energy of each flow battery energy storage subsystem being carried to load.Preferably, when charging circuit charged for a flow battery energy storage subsystem, discharge circuit was used for the electric energy of another flow battery energy storage subsystem is carried to load.Owing to can charge simultaneously and discharge, thereby produce more heat, can on the other hand, also can protect better so that system becomes warmer on the one hand each pipeline of conveying electrolyte; And can reduce the required amount of power of second source and load.
One of ordinary skill in the art will appreciate that the configuration of Fig. 2 only is exemplary.Charging circuit of the present invention (commutation circuit) can be connected to the external power source more than 2.Just, be that first power supply and electrical network are the second source except being connected to the power plant, charging circuit can also be connected to other power supply simultaneously.On the other hand, also can only to connect second source be electrical network and not being connected with any other power supply to charging circuit.
Fig. 3 shows the block diagram according to controller 200 of the present invention.As mentioned above, controller 200 is electrically connected with each parts of system 10 by a control communication interface 214, and interface 214 can utilize and use the RS485 of MODBUS agreement to realize.The parts that are electrically connected with control system 200 comprise pump 36,54, heat exchanger 38,56, and supply valve 40,60 returns valve 44,62, mains switch 68 and load switch 68.Controller 200 also with balanced fluid reservoir 28,46 in anode and the equilibrium/mixture control 215 of catholyte 22,24 be electrically connected.As requested, the electrolyte content in 215 increases of equilibrium/mixture control or the reduction fluid reservoir 28,46 is to keep the roughly balanced of anode and catholyte 22,24.Equilibrium/mixture control 215 can provide extra anode and catholyte 22,24 from auxiliary fluid reservoir (not shown), perhaps reduces electrolyte 22,24 by the discharging tube (not shown).
Fig. 4 shows the block diagram according to commutation circuit 300 of the present invention.As shown in the figure, commutation circuit 300 comprises first circuit 316 of the first coil J10 power on/off of controlling first relay 328 and the second circuit 318 of the second coil J20 power on/off of control second relay 330.The binding post 320 and 322 of first circuit 316 is connected to controller 200 by interface 214 respectively, between binding post 320 and 322, be connected with resistance R 1, resistance R 1 is connected to an end of the base stage and the capacitor C 1 of transistor T 1, and the other end of capacitor C 1 is connected to binding post 322.The collector electrode of transistor T 1 is connected to binding post 320.The emitter of transistor T 1 is connected to the base stage of transistor T 2.The end of the first coil J10 of the backward end D1 of the collector electrode of transistor T 1 and diode and relay 328 links together.The other end of the forward end of diode D1 and coil J10 is connected to the collector electrode of transistor T 2 together.The emitter of transistor T 2 is connected to the other end of capacitor C 1.The binding post 324 and 326 of second circuit 318 is connected to controller 200 by interface 214 respectively, between binding post 324 and 326, be connected with resistance R 2, resistance R 2 is connected to an end of the base stage and the capacitor C 2 of transistor T 3, and the other end of capacitor C 2 is connected to binding post 326.The collector electrode of transistor T 3 is connected to binding post 324.The emitter of transistor T 3 is connected to the base stage of transistor T 4.The end of the second coil J20 of the backward end of the collector electrode of transistor T 3 and diode D2 and relay 330 links together.The other end of the forward end of diode D2 and coil J20 is connected to the collector electrode of transistor T 4 together.The emitter of transistor T 4 is connected to the other end of capacitor C 1.
According to the present invention, whether monitoring control devices exists needs forced system 10 operations under the low temperature situation.According to the present invention, in the process of monitoring low temperature situation with forced system 10 operations, the data that controller can only transmit according to the electrolyte temperature transducer, whether the interior electrolyte temperature of the pipeline that transports electrolyte of judging system 10 is lower than the first predetermined temperature threshold, if controller 200 judges whether and need still charge to system 10 from electrical network from the power plant.Charge for from the power plant if desired VRB-ESS 10, then controller 200 is given the first set of connections terminal 320 by interface 214,322 send connection signal, the then transistor T 1 of circuit 316 and T2 conducting, thereby power on for coil J10, make the normally-closed contact K102 of relay 328 disconnect, guarantee and to charge for VRB-ESS 10 from electrical network; Simultaneously, the normally opened contact K101 closure of relay 328 makes the electric energy in power plant enough by interface 332, and normally-closed contact K202 charges for VRB-ESS 10 to the circuit of interface 332.The circuit that normally opened contact K101 and normally-closed contact K202 constitute becomes first circuit.The circuit that normally opened contact K201 and normally-closed contact K102 constitute is called second circuit.Normally opened contact K101, normally-closed contact 102, normally opened contact K201 and normally-closed contact K202 have constituted the interlock function of commutation circuit.Utilize the power supply of electrical network to charge for VRB-ESS 10 if desired, then controller 200 is given the second set of connections terminal 324 by interface 214,326 send connection signal, the then transistor T 3 of circuit 318 and T4 conducting, thereby power on for coil J20, make the normally-closed contact K202 of relay 330 disconnect, guarantee and to charge for VRB-ESS 10 from the power plant; Simultaneously, the normally opened contact K201 closure of relay 330 makes the electric energy of electrical network enough by interface 336, and normally-closed contact K102 charges for VRB-ESS 10 to the circuit of interface 338.
Replacedly, having only one tunnel circuit pathways to be connected to first power supply in charging circuit is under the unsettled situation of power plant and another road circuit, when under monitoring the low temperature situation, needing forced system 10 operations, controller 200 is given the first set of connections terminal 320 by interface 214,322 send connection signal, the then transistor T 1 of circuit 316 and T2 conducting, thereby power on for coil J10, make the normally opened contact K101 closure of relay 328, make the electric energy in power plant enough by interface 332, normally-closed contact K202 charges for VRB-ESS 10 to the circuit of interface 332.Equally, in charging circuit, have only one tunnel circuit pathways to be connected under the situation that second source is an electrical network, controller 200 is given the second set of connections terminal 324 by interface 214,326 send connection signal, the then transistor T 3 of circuit 318 and T4 conducting, thus power on for coil J20, make the normally opened contact K201 closure of relay 330, make the electric energy of electrical network enough by interface 336, normally-closed contact K102 charges for VRB-ESS 10 to the circuit of interface 338.
Having only one tunnel circuit pathways to be connected to first power supply in charging circuit is that those of ordinary skills can think that this situation is equivalent to the situation that charging circuit only comprises one tunnel circuit pathways under the unsettled situation of power plant and another road circuit.
According to a preferred embodiment of the invention, circuit 318 is the same with 316 circuit structure, and the concrete parameter of circuit element can be adjusted according to concrete condition.Yet as well known to those of ordinary skill in the art, circuit 316 and 318 circuit structure also can be different, and can adopt other circuit topological structure to finish the function of commutation circuit 300.
In the above-described embodiments, have two circuits, and in can guaranteeing that commutation circuit at one time, have only a route road to connect external power source according to the said structure of commutation circuit 300 of the present invention.Those of ordinary skills can understand, can further expand commutation circuit based on above-mentioned principle, it is had more than the circuit more than two to connect more external power source, guarantee that simultaneously circuit that this commutation circuit only allows to connect in it at one time connects an external power source.
According to the foregoing description, be called first circuit pathways through charger (302), mains switch (68) to the path of VRB-ESS 10 from first circuit of commutation circuit; Be called the second circuit path from second circuit of commutation circuit through charger (302), mains switch (68) to the path of VRB-ESS 10.That is to say that charging circuit has two circuit pathways.Should be noted that when commutation circuit has plural circuit charging circuit has the circuit pathways more than two.
According to the present invention, for each pipeline that is used for conveying electrolyte that makes energy storage system is unlikely to be frozen to break under low temperature condition, after controller 200 is forced VRB-ESS 10 operation as required and VRB-ESS 10 is charged, if detecting the charging of VRB-ESS 10, controller 200 reached the first predetermined capacitance threshold value, then give the first set of connections terminal 320 by interface 214,322 or the second set of connections terminal 324,326 transmit control signal, make the first coil J10 or the second not conducting of coil J20, thereby disconnection power plant or electrical network are to the charging of VRB-ESS 10.Simultaneously, controller 200 transmits control signal for load switch 70 by interface 214, makes load switch 70 conductings, and VRB-ESS 10 is powered to the user by the DC/AC transducer.In this manual, the user refers to electrical network 310 or load.When the VRB-ESS10 electric energy stored drops to the second predetermined capacitance threshold value, controller 200 disconnecting consumers switches 70, simultaneously by the first set of connections terminal 320,322 or the second set of connections terminal 324,326 transmit control signal, make the first coil J10 or the second coil J20 conducting, utilize the power supply of power plant or electrical network to give VRB-ESS 10 chargings.Under low temperature condition, controller 200 repeats above-mentioned control repeatedly, makes VRB-ESS10 forced service at low temperatures, utilizes system 10 itself to move the heat that produces and guarantee that each pipeline that is used for conveying electrolyte of system 10 does not break under low temperature condition.As an alternative, when VRB-ESS 10 electric energy stored reach the predetermined second capacitance threshold value, controller 200 is when the charging that finishes VRB-ESS (10), also can not transmit control signal discharge circuit is connected, but when each the ducted electrolyte temperature that detects VRB-ESS (10) is lower than predetermined temperature value, controller transmits control signal and recloses charging circuit, utilizes external power source that VRB-ESS (10) is charged.In the process of controller 200 operation low temperature controlling application programs, reached the second environment temperature threshold and surpassed preset time if detect ambient temperature, then controller 200 finishes the low temperature controlling application program.According to the present invention, this preset time can be 30 minutes, 60 minutes etc.It should be understood by one skilled in the art that this preset time can be according to the value that specifically should be used for being set at other of VRB-ESS 10.
Replacedly, according to the present invention, in the process of monitoring low temperature situation with forced system 10 operations, the data that controller also can be not only transmits according to the electrolyte temperature transducer judge that whether the electrolyte temperature in the pipeline that transports electrolyte of system 10 is lower than the first predetermined temperature threshold, also judges according to the data of environment temperature sensor transmission whether ambient temperature is lower than the first environment temperature threshold simultaneously.If the two condition all satisfies, then carry out the above-mentioned operation that discharges and recharges.
Fig. 5 shows the flow chart according to the method for the VRB-ESS of making safe operation of the present invention.As shown in Figure 5, controller 200 is by electrolyte temperature sensor monitoring electrolyte temperature, step 501.It is anode and cathode temperature transducer 220a that controller 200 receives the electrolyte temperature transducer, the data-signal that 220b sends, antianode and catholyte liquid temp detect (step 500), judge whether the male or female electrolyte temperature is lower than first predetermined temperature threshold (step 502).For example, this first predetermined temperature threshold can be 5 ℃, or other Temperature numerical of setting as required.Replacedly, in step 502, judge whether the male or female electrolyte temperature is lower than first predetermined temperature threshold or first scheduled time of first predetermined temperature threshold.This preset time can be 30 minutes or the time numerical value set as required.If determine that the male or female electrolyte temperature is not lower than first predetermined temperature threshold, then continue electrolyte temperature is detected.If determining anode or catholyte liquid temp has been lower than first predetermined temperature threshold or has been lower than first scheduled time of first predetermined temperature threshold, then controller 200 startup low temperature controlling application programs are controlled system 400, force VRB-ESS 10 to discharge and recharge, the heat that utilizes VRB-ESS 10 operation to produce keeps VRB-ESS 10, and each is used for the temperature of the pipeline of conveying electrolyte, thereby avoids the damage (step 504) of VRB-ESS 10 under low temperature environment.In the process of forcing VRB-ESS 10 operations, controller 200 judges whether to receive the conditional order that finishes the low temperature controlling application program.If VRB-ESS 10 is in service forcing, the male or female electrolyte temperature has been higher than second predetermined temperature threshold or has been higher than second predetermined temperature threshold, second preset time, perhaps receive the order that finishes the low temperature control program, then controller 200 finishes low temperature controlling application program (step 508), starts conventional controlling application program system 400 is controlled.
According to the present invention, after step 502, before controller 200 startup low temperature controlling application programs are controlled system 400, the signal that controller 200 further reception environment temperature sensors 222 send, ambient temperature is detected, judge whether ambient temperature is lower than the first environment temperature threshold.If ambient temperature has been lower than the first environment temperature threshold, then proceed to step 504, if ambient temperature is not lower than the first environment temperature threshold, then return step 500.It should be understood by one skilled in the art that for the present invention this additional step is not necessary.
According to the present invention,, then might cause electrolyte precipitation or viscosity too high and cause the energy storage system normally not move because if electrolyte temperature is low excessively.For example, for vanadium redox battery, normal operating temperature range is 5-40 ℃, and preferred working temperature is about 30 ℃.Therefore, first temperature threshold can be 5 ℃, 10 ℃ or any one temperature value in 5-10 ℃.Equally, the first environment temperature threshold can or be lower than 5 ℃ slightly for 5 ℃.Usually, the second environment temperature threshold is higher than the first environment temperature threshold, can for example be 10 ℃, 15 ℃ or the like.It should be understood by one skilled in the art that this first environment temperature threshold, this second environment temperature threshold can be according to the value that specifically should be used for being set at other of VRB-ESS 10.
Fig. 6 shows the concrete implementation step that pressure VRB-ESS 10 according to the present invention discharges and recharges.As shown in Figure 6, in step 510, controller 200 judges whether that the power supply that can use the power plant to send is that first power supply charges for VRB-ESS 10.If controller 200 detects power plant 308 and generating electricity, then continue step 512.In step 512, controller 200 transmissions add the signal of telecommunication makes its closure to switch 68.Simultaneously, controller sends and adds the binding post 320,322 (step 514) of electric control signal to commutation circuit 300.As mentioned above, when the first set of connections terminal 320,322 when receiving control signal, and 308 connect through the circuit of commutation circuit 300, charger 302 and switch 68 to VRB-ESS 10 from the power plant, thereby the electric energy that utilizes the power plant is to VRB-ESS 10 charge (step 516).In the process that VRB-ESS 10 is charged, whether the electric energy that controller 200 detects VRB-ESS 10 reaches the first predetermined capacitance threshold value, for example be the maximum storage capacitance of VRB-ESS 10 or 99%, 98% grade (step 518) of maximum storage capacitance.It should be understood by one skilled in the art that the first predetermined capacitance threshold value can be according to the value that specifically should be used for being set at other of VRB-ESS 10.If do not reach the first predetermined capacitance threshold value, then flow process proceeds to step 520, continues to keep the electric control signal that adds that controller 200 is given binding post 320,322.If reached the first predetermined capacitance threshold value, then controller 200 is cancelled the electric control signal that adds that imposes on binding post 320,322, and relay switch K101 is disconnected; Simultaneously, controller sends a signal to switch 68, cut-off switch 68 (step 522).In step 524, controller 200 sends a signal to switch 70, with its closure, thereby makes VRB-ESS 10 give electrical network 310 power supplies (step 526) by the DC/AC transducer.Replacedly, also can make VRB-ESS 10 by DC/AC transducer powering load.In step 528, controller 200 is judged VRB-ESS 10 in the process of giving electrical network or electric, and whether its remaining electric energy has dropped to the second predetermined capacitance threshold value, for example can be 90%, 95% etc. of VRB-ESS 10 maximum capacitances.It should be understood by one skilled in the art that the second predetermined capacitance threshold value can be according to the value that specifically should be used for being set at other of VRB-ESS 10.If, controller 200 cut-off switch 70 (step 530) then, flow process turns back to step 512.If not, then flow process turns back to step 526.
According to the present invention, alternatively, before step 510, controller 200 judges that whether the storage of electrical energy of VRB-ESS 10 has surpassed the first predetermined capacitance threshold value, for example is 99% of the maximum storage capacitance of VRB-ESS 10 or maximum storage capacitance.If then flow process proceeds to step 522.If not, then flow process proceeds to step 510.
If under the electrolyte low temperature condition, controller 200 judges that power plant (first power supply) does not have power supply or can't use the power supply in power plant to make VRB-ESS 10 operations, and then controller 200 sends a signal to switch 70 with its connection (step 532).In step 534, controller 200 sends and adds the signal of telecommunication to binding post 324,326.As mentioned above, when binding post 324,326 when receiving control signal, is that second source is connected through the circuit of commutation circuit 300, charger 302 and switch 68 to VRB-ESS 10 from electrical network 310, thereby the electric energy that utilizes the power plant is to VRB-ESS 10 charge (step 536).Afterwards, proceed to step 518.Under the situation of utilizing electrical network to the VRB-ESS charging, as the electric energy that detects VRB-ESS 10 does not reach the first predetermined capacitance threshold value as yet, then flow process proceeds to step 520, continue to keep controller 200 and give binding post 324,326 add electric control signal, thereby continue VRB-ESS 10 is charged.Reach the first predetermined capacitance threshold value if detect the electric energy of VRB-ESS 10, then flow process proceeds to step 522.In this case, after step 530, flow process turns back to step 532 (not shown).
According to the present invention, under the enough big situation of VRB-ESS 10 memory capacity, the low temperature controlling application program also can not comprise step 518 to step 530.As an alternative, after the power supply that utilizes power plant or electrical network charges to VRB-ESS 10, controller 200 every preset time length as 1 hour, disconnecting power switch 68, when the electrolyte temperature in each pipeline that detects VRB-ESS (10) is lower than predetermined temperature value, and then energized switch 68, control so repeatedly.According to the present invention, the temperature of electrolyte is by the anode and the temperature of anode transducer 220a that are arranged on a lot of positions among the VRB- ESS 10, and 220b gathers and sends controller 200 to through communication interface 214, is judged by controller.
According to the present invention, replacedly, in charging circuit, have only one tunnel circuit pathways to be connected under the situation that first power supply is the power plant, when needing forced system 10 operations under monitoring the low temperature situation, then controller 200 does not need execution in step 532-536.In other words, in this case, method of the present invention does not need step 532-536.Equally replacedly, in charging circuit, have only one tunnel circuit pathways to be connected under the situation as the electrical network of second source, when under monitoring the low temperature situation, needing forced system 10 operations, controller not execution in step 510 to step 516, is execution in step 532 but directly send a signal to switch 70 with its connection, carries out corresponding steps then as mentioned above.In other words, in this case, method of the present invention does not comprise step 510-516.
To those skilled in the art, under the situation that does not deviate from basic principle of the present invention, can carry out various variations to the concrete steps of the foregoing description.
Claims (24)
1. one kind makes the system of safe operation (400) at low temperatures of flow battery energy storage system, and described system (400) comprising:
Charging circuit with at least two circuit pathways that can be electrically connected to external power source, have a circuit pathways of under having the situation of at least two different external power sources, guaranteeing to have only in the same time in the charging circuit and be communicated with, be used for described flow battery energy storage system is charged only to connect an external power source function;
Discharge circuit is used for the electric energy of described flow battery energy storage system is carried to load;
The electrolyte temperature transducer is used to detect the temperature of anode and catholyte;
Controller (200); it is connected with the electrolyte temperature sensor electrical to gather and the relevant service data of described energy storage system by monitor communication interface (218); and by control communication interface (214) and charging circuit; discharge circuit and described energy storage system are electrically connected; when controller (200) is controlled and is monitored the operation of described energy storage system and judges that according to the data of electrolyte temperature sensor acquisition electrolyte temperature is lower than first predetermined temperature threshold; described controller (200) makes described flow battery energy storage system utilize external power source and load to discharge and recharge, thereby the heat that the utilization of described energy storage system is produced in charge and discharge process is protected each pipeline of its conveying electrolyte.
2. one kind makes the system of safe operation (400) at low temperatures of flow battery energy storage system, and described system (400) comprising:
Charging circuit with at least two circuit pathways that can be electrically connected to external power source, have a circuit pathways of under having the situation of at least two different external power sources, guaranteeing to have only in the same time in the charging circuit and be communicated with, be used for described flow battery energy storage system is charged only to connect an external power source function;
Discharge circuit is used for the electric energy of described flow battery energy storage system is carried to load;
The electrolyte temperature transducer is used to detect the temperature of anode and catholyte;
Environment temperature sensor is used for the temperature of testing environment;
Controller (200); it is electrically connected to gather and the relevant service data of described energy storage system with electrolyte temperature transducer and environment temperature sensor by monitor communication interface (218); and by control communication interface (214) and charging circuit; discharge circuit and described energy storage system are electrically connected; controller (200) is controlled and is monitored the operation of described energy storage system and judges that according to the data of electrolyte temperature sensor acquisition electrolyte temperature is lower than first predetermined temperature threshold; and when judging that according to the data of environment temperature sensor collection ambient temperature is lower than the first environment temperature threshold; described controller (200) makes described flow battery energy storage system utilize external power source and load to discharge and recharge, thereby the heat that the utilization of described energy storage system is produced in charge and discharge process is protected each pipeline of its conveying electrolyte.
3. as system (400) as described in claim 1 or 2, wherein, described flow battery energy storage system comprises two or more subsystems, when described charging circuit charged for a flow battery energy storage subsystem, described discharge circuit was used for the electric energy of another flow battery energy storage subsystem is carried to described load.
As in the claim 1 to 3 each as described in system (400), wherein, described flow battery energy storage system is a vanadium redox battery energy storage system.
5. described system as claimed in claim 4 (400), wherein, described charging circuit comprises:
Commutation circuit (300) has at least two circuits that can be electrically connected to external power source, has to guarantee that its inner circuit has only a circuit to be communicated with to connect the function of an external power source in the same time at least under the situation that has two external power sources;
Be electrically connected to the charger (302) of commutation circuit, alternating current is converted to direct current so that vanadium redox battery energy storage system (10) is charged;
Mains switch (68) is used to be electrically connected charger (302) and vanadium redox battery energy storage system (10).
6. described system as claimed in claim 5 (400), wherein, described commutation circuit comprises:
First circuit is electrically connected to the signal of controller (200) with reception control first relay by the first set of connections terminal (320,322), thereby controls switching on and off of first circuit pathways;
Second circuit is electrically connected to controller (200) receiving the signal of control second relay by the second set of connections terminal (324,326), thus control second circuit path switch on and off,
Wherein, first circuit pathways be from first circuit of commutation circuit through charger (302), mains switch (68), to the circuit of vanadium redox battery energy storage system (10), the second circuit path is through charger (302), mains switch (68), to the circuit of vanadium redox battery energy storage system (10) from second circuit of commutation circuit.
7. described system as claimed in claim 6 (400), wherein, described discharge circuit comprises:
DC/AC transducer (304) is connected to load, will be converted to alternating current from the direct current of vanadium redox battery energy storage system (10);
Load switch (70) is used to connect vanadium redox battery energy storage system (10) and DC/AC transducer (304).
8. described system as claimed in claim 7 (400), wherein, described charger (302) and described DC/AC transducer (304) are integrated into two way convertor.
9. as system (400) as described in claim 7 or 8, wherein, described external power source comprises first power supply and second source, first circuit pathways of described charging circuit is connected to first power supply, and its second circuit path is connected to second source, and described controller (200) makes flow battery energy storage system (10) utilize external power source and load to discharge and recharge to comprise:
Controller (200) judges whether to use first power supply to charge for vanadium redox battery energy storage system (10), if can, controller (200) signal that first coil that makes first relay in the commutation circuit powers up that transmits control signal is connected thereby make from the circuit of first power supply to the first circuit pathways; If cannot, controller (200) signal that second coil of second relay that makes commutation circuit powers up that transmits control signal, thus the circuit from second source to the second circuit path is connected;
Controller (200) judges whether the capacitance of having stored of vanadium redox battery energy storage system (10) has reached predetermined capacitance threshold value, if, controller (200) makes not conducting of commutation circuit (300), and the disconnecting power switch that transmits control signal (68) and make load switch closure (70) makes vanadium redox battery energy storage system (10) by DC/AC transducer (304) powering load.
10. as system (400) as described in claim 7 or 8, wherein said controller (200) makes flow battery energy storage system (10) carry out at low temperatures in the charging and discharging process further judging whether ambient temperature has risen reaches the second environment temperature threshold and above preset time, if controller (200) sends and finishes discharging and recharging of vanadium redox battery energy storage system (10) at low temperatures.
11. as system (400) as described in claim 7 or 8, wherein, described external power source only comprises second source, first circuit pathways of described charging circuit is not attached to any power source, and its second circuit path is connected to second source, and described controller (200) makes flow battery energy storage system (10) utilize external power source and load to discharge and recharge to comprise:
Controller (200) signal that second coil of second relay that makes commutation circuit powers up that transmits control signal, thus the circuit from second source to the second circuit path is connected;
Controller (200) judges whether the capacitance of having stored of vanadium redox battery energy storage system (10) has reached predetermined capacitance threshold value, if, controller (200) makes not conducting of commutation circuit (300), and the disconnecting power switch that transmits control signal (68) and make load switch closure (70) makes vanadium redox battery energy storage system (10) by DC/AC transducer (304) powering load.
12. as in the claim 1 to 11 each as described in system (400), wherein, described load is the electrolyte heater.
13. one kind makes the flow battery energy storage system method of safe operation at low temperatures, described method comprises:
Utilize electrolyte temperature sensor electrolyte temperature and send the data to controller, controller judges whether electrolyte temperature is lower than first temperature threshold;
Be lower than first temperature threshold if determine electrolyte temperature, then force described flow battery energy storage system to utilize external power source and load to discharge and recharge;
System utilizes external power source and load to carry out in the charge and discharge process in the described flow battery energy storage of pressure, judge whether to receive the instruction that end forced fluid flow battery power storage system discharges and recharges, if, then finishing flow battery energy storage system utilizes external power source and load to carry out charging and discharging process, if not, then continue forced fluid flow battery power storage system and utilize external power source and load to discharge and recharge.
14., wherein, be lower than first temperature threshold if determine electrolyte temperature as the method for claim 13, forcing described flow battery energy storage system to utilize before external power source and load discharge and recharge, described method further comprises:
Described controller judges further whether ambient temperature is lower than the ambient temperature threshold value;
When ambient temperature is lower than the ambient temperature threshold value, carries out the described flow battery energy storage of pressure system and utilize external power source and load to discharge and recharge.
15. one kind makes the flow battery energy storage system method of safe operation at low temperatures, described method comprises:
Utilize electrolyte temperature detector detection electrolyte temperature and send the data to controller, controller judges whether electrolyte temperature is lower than first temperature threshold;
If determine that electrolyte temperature is lower than first temperature threshold, then forced fluid flow battery power storage system utilizes external power source to charge;
Judge whether to receive the instruction that end forced fluid flow battery power storage system is charged, if, then finish the process that flow battery energy storage system utilizes external power source to charge, if not, then continue forced fluid flow battery power storage system and utilize external power source to charge.
16. as each method in the claim 13 to 15, wherein, described flow battery energy storage system comprises two or more subsystems, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise:
When described charging circuit charged for a flow battery energy storage subsystem, described discharge circuit was used for the electric energy of another flow battery energy storage subsystem is carried to described load.
17. as each method in the claim 13 to 16, wherein, described flow battery energy storage system is an all-vanadium flow battery energy storage system.
18. as the method for claim 17, wherein, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise:
A) charging circuit is connected, utilized external power source that all-vanadium flow battery energy storage system is charged;
B) judge whether the electric energy stored in the all-vanadium flow battery energy storage system has reached the first predetermined capacitance threshold value, if electric energy stored does not reach the first predetermined capacitance threshold value, continue to utilize external power source that all-vanadium flow battery energy storage system (10) is charged;
C) if electric energy stored has reached the first predetermined capacitance threshold value, the disconnection charging circuit that transmits control signal, and the connection discharge circuit that transmits control signal externally discharge all-vanadium flow battery energy storage system;
D) judge whether electric energy stored has dropped to the second predetermined capacitance threshold value in the all-vanadium flow battery energy storage system;
E) if electric energy stored has dropped to the second predetermined capacitance threshold value, transmitting control signal disconnects the discharge circuit and the connection charging circuit that transmits control signal, and utilizes external power source that all-vanadium flow battery energy storage system is charged;
F), continue to make externally discharge of all-vanadium flow battery energy storage system (10) if electric energy stored does not drop to the second predetermined capacitance threshold value.
19. as the method for claim 17, wherein, described forced fluid flow battery power storage system is utilized external power source to charge to comprise:
Charging circuit is connected, utilized external power source that flow battery energy storage system is charged;
Whether the charging of judging vanadium redox battery energy storage system has continued predetermined time value, if not, continue to utilize external power source that vanadium redox battery energy storage system is charged, if the disconnection charging circuit transmits control signal;
Whether each ducted electrolyte temperature of judging vanadium redox battery energy storage system is lower than predetermined temperature value;
If each ducted electrolyte temperature of vanadium redox battery energy storage system is lower than predetermined temperature value, the connection charging circuit that transmits control signal utilizes external power source that vanadium redox battery energy storage system is charged;
If each ducted electrolyte temperature of vanadium redox battery energy storage system is not lower than predetermined temperature value, continue each ducted electrolyte temperature of monitoring vanadium redox battery energy storage system, each ducted electrolyte temperature up to vanadium redox battery energy storage system is lower than predetermined temperature value, the connection charging circuit that transmits control signal utilizes external power source that vanadium redox battery energy storage system is charged.
20. as the method for claim 18 or 19, wherein, charging circuit is connected, the step of utilizing external power source that all-vanadium flow battery energy storage system is charged comprises:
Judge whether to use first power supply to charge for all-vanadium flow battery energy storage system;
If of course, controller transmits control signal to make from first power supply and connects through commutation circuit (300), charger (302), mains switch (68), to the circuit of all-vanadium flow battery energy storage system;
If cannot, controller transmits control signal to make from second source and connects through commutation circuit (300), charger (302), mains switch (68), to the circuit of all-vanadium flow battery energy storage system.
21. as the method for claim 17, wherein, described external power source only comprises second source, and charging circuit is connected, the step of utilizing external power source that all-vanadium flow battery energy storage system is charged comprises:
Controller transmits control signal to make from second source and connects through commutation circuit (300), charger (302), mains switch (68), to the circuit of all-vanadium flow battery energy storage system.
22., before charging circuit being connected, utilized external power source that all-vanadium flow battery energy storage system (10) is charged, further comprise step as the method for claim 17:
Judge whether the electric energy stored in the all-vanadium flow battery energy storage system has reached the first predetermined capacitance threshold value, if electric energy stored does not reach the first predetermined capacitance threshold value, proceed to step a), if electric energy stored has reached the first predetermined capacitance threshold value, proceed to step c).
23. as each method in the claim 13 to 22, wherein, described forced fluid flow battery power storage system is utilized external power source and load to discharge and recharge to comprise:
Two way convertor will be converted to direct current from the alternating current of described external power source so that described flow battery energy storage system is charged;
Described two way convertor will be converted to alternating current to offer described load from the direct current of described flow battery energy storage system.
24. as the method for claim 23, wherein, described load is the electrolyte heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010106067844A CN102110829A (en) | 2009-12-28 | 2010-12-27 | System and method for allowing flow battery energy storage system to safely operate |
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| CN200910260197 | 2009-12-28 | ||
| CN200910260197.1 | 2009-12-28 | ||
| CN2010106067844A CN102110829A (en) | 2009-12-28 | 2010-12-27 | System and method for allowing flow battery energy storage system to safely operate |
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| CN102110829A true CN102110829A (en) | 2011-06-29 |
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| CN2010106067844A Pending CN102110829A (en) | 2009-12-28 | 2010-12-27 | System and method for allowing flow battery energy storage system to safely operate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000925A (en) * | 2012-11-19 | 2013-03-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Mobile all-vanadium redox flow battery system for vanadium battery material and electric pile structure evaluation |
| CN104795584A (en) * | 2015-04-24 | 2015-07-22 | 大连融科储能技术发展有限公司 | Method and device for realizing low-temperature quick start of flow cell system and flow cell system |
| CN109375114A (en) * | 2018-11-15 | 2019-02-22 | 上海发电设备成套设计研究院有限责任公司 | A kind of siderochrome flow battery list pile test macro |
| CN114583206A (en) * | 2022-02-15 | 2022-06-03 | 中国长江三峡集团有限公司 | Low-temperature protection system, all-vanadium redox flow battery system and low-temperature protection method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173242A (en) * | 1994-11-28 | 1998-02-11 | 查特克实验室有限公司 | A method and an apparatus for controlling battery temp. during changing/dischanging |
| TW200635172A (en) * | 2005-01-10 | 2006-10-01 | Vrb Power Systems Inc | System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system |
| CN201349041Y (en) * | 2009-02-10 | 2009-11-18 | 铁岭宝众新能源汽车有限公司 | Heat insulation accumulator |
-
2010
- 2010-12-27 CN CN2010106067844A patent/CN102110829A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173242A (en) * | 1994-11-28 | 1998-02-11 | 查特克实验室有限公司 | A method and an apparatus for controlling battery temp. during changing/dischanging |
| TW200635172A (en) * | 2005-01-10 | 2006-10-01 | Vrb Power Systems Inc | System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system |
| CN201349041Y (en) * | 2009-02-10 | 2009-11-18 | 铁岭宝众新能源汽车有限公司 | Heat insulation accumulator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000925A (en) * | 2012-11-19 | 2013-03-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Mobile all-vanadium redox flow battery system for vanadium battery material and electric pile structure evaluation |
| CN103000925B (en) * | 2012-11-19 | 2015-03-25 | 国家电网公司 | Mobile all-vanadium redox flow battery system for vanadium battery material and electric pile structure evaluation |
| CN104795584A (en) * | 2015-04-24 | 2015-07-22 | 大连融科储能技术发展有限公司 | Method and device for realizing low-temperature quick start of flow cell system and flow cell system |
| CN109375114A (en) * | 2018-11-15 | 2019-02-22 | 上海发电设备成套设计研究院有限责任公司 | A kind of siderochrome flow battery list pile test macro |
| CN114583206A (en) * | 2022-02-15 | 2022-06-03 | 中国长江三峡集团有限公司 | Low-temperature protection system, all-vanadium redox flow battery system and low-temperature protection method thereof |
| CN114583206B (en) * | 2022-02-15 | 2023-10-20 | 中国长江三峡集团有限公司 | Low-temperature protection system, all-vanadium redox flow battery system and low-temperature protection method thereof |
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Application publication date: 20110629 |