KR20140068564A - Method and System for Battery Management - Google Patents

Abstract

The present invention relates to a method and a system for managing a battery, and more specifically, to a method and a system for managing a battery using an energy storage device of a kind different from a flow battery and storing the energy generated during a discharge of the flow battery in the energy storage device of a different kind for reuse, thereby improving an energy usage efficiency. In order to accomplish the objective, the method for managing a battery according to an embodiment of the present invention relates to a battery management method of an energy storage system including the flow battery and comprises the steps of: acknowledging a remaining capacity of the flow battery, determining whether an additional discharge is required for the flow battery, transferring the energy generated in the flow battery to the energy storage device, and charging the energy storage device with the transferred energy.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a battery management method and system, and more particularly, to a battery management method and system, and more particularly, to a battery management method and system, To a battery management method and system for increasing the efficiency of use.

In general, a type of device called an energy storage system (ESS) includes a battery capable of charging and discharging, and an ultracapacitor capable of simply storing energy. There are various types of batteries that can be charged and discharged, such as flow batteries and lithium-ion batteries.

Here, a flow battery is a chargeable / dischargeable battery capable of storing electrical energy in two electrolyte tanks, storing a mixture of an electrolyte and an energy storage material in a large tank, and operating them by pumping them to a current generator. However, the operating temperature range is not large, and its use has been limited due to its low energy density.

However, flow batteries use water-based electrolytes and energy storage materials, such as iron and zinc, which are abundant in the materials, which can offset some of the initial costs.

In addition, PNNL researchers have solved this disadvantage by using two different vanadium ions, while conventional flow-battery technology has been dependent on sulfuric acid, but PNNL researchers have achieved a 70% storage capacity increase with hydrochloric acid, Lt; RTI ID = 0.0 > temperature. ≪ / RTI > This results in less space, more energy storage, and no additional equipment for temperature control.

In addition, a flow battery has the ability to store intermittent energy supply and demand like the other batteries, but it does not change its capacity to store energy over time and can react directly when needed to produce electricity.

Such a flow battery is advantageous in that it can be easily mass-produced, can be used for a long time, and has a long life. However, it has a drawback in that it needs to be continuously discharged for a long time compared to other secondary batteries in order to maintain the efficiency and life of the battery. Flow batteries can be irregularly charged due to their characteristics, but discharges must be performed periodically to a certain voltage or less.

On the other hand, a secondary battery such as a commonly used lithium-ion battery uses lithium-cobalt oxide on one side and graphite on the other side, both of which have a layered structure in which lithium ions enter the interlayer, The discharge continues. At this time, lithium-cobalt oxide is relatively stable to this movement of lithium, whereas graphite degrades layer structure when this movement is repeated many times. The result is a shortened battery life. Most cell phones use lithium-ion batteries, which is why the battery life time is reduced later.

The secondary battery such as a general lithium-ion battery also exhibits a shortened life span when the charge and discharge are repeated. However, compared with the flow battery, the charge / discharge is free and the charge / It has the advantage of being reusable as long as the chemical properties are maintained.

Korean Patent No. 10-0906249 entitled " Control Method of Battery System for Improving Safety "discloses a method of controlling a battery system in which an abnormal operating state of a battery module is discharged when a plurality of batteries or battery modules are electrically connected to constitute a high- Thereby improving the safety of the entire battery system.

The above prior art is derived from the object of improving the safety of the entire ESS system by coping with a battery module in an abnormal operating state. The abnormal battery module is discharged and the storage and supply of energy is controlled using the remaining normal battery module Technology. However, since the foregoing prior art deals with a plurality of cells or battery modules only in the same kind, it is difficult to apply various kinds of batteries. In other words, in the case of ESS combined with various renewable energy systems, there is a high possibility of constructing a system together with various types of battery devices. Thus, existing prior art including the above prior arts is considering various renewable energy systems And there is a low possibility that it can be applied to various renewable energy systems.

Therefore, a technology for improving the efficiency of energy use is required considering the characteristics of various energy storage devices.

Korean Patent No. 10-0906249

The present invention aims at efficiently managing energy in an extended system including various renewable energy systems in consideration of characteristics of an energy storage device that can be combined with various renewable energy systems.

It is another object of the present invention to provide an energy management method and system that can increase energy utilization efficiency without deteriorating performance of various kinds of energy storage devices such as a flow battery.

It is another object of the present invention to provide a separate energy storage device for storing energy generated during an additional discharge of a flow battery, and then recycle waste energy by using it when necessary.

It is another object of the present invention to provide a renewable energy management system capable of driving a battery management system (BMS) as an internal energy source in an environment where additional energy is not additionally supplied from the outside.

In addition, the present invention aims at reusing energy generated from a flow battery, so that it is possible to drive a battery management system in an environment where it is difficult to receive separate energy from the outside.

According to another aspect of the present invention, there is provided a method of managing a battery in an energy storage system including a flow battery, comprising the steps of: checking a remaining capacity of the flow battery; Determining whether a process is required, transferring energy generated from the flow battery to an energy storage device, and charging the transferred energy to the energy storage device.

At this time, the battery management method of the present invention further includes the step of controlling and managing the operation of the flow battery using the energy stored in the energy storage device. The step of controlling and managing the operation of the flow battery may drive the battery management system of the flow battery and the power source (pump, etc.) of the flow battery.

The step of transferring the energy generated from the flow battery to the energy storage device may include converting the voltage of energy generated in the additional discharge process of the flow battery using the first voltage conversion means and storing the converted energy in the energy storage device, The energy stored in the energy storing means is converted into a voltage using the second voltage converting means, and then the voltage is transferred to the energy storing device.

Meanwhile, the battery management system according to the present invention includes a controller for determining a remaining capacity of a flow battery and controlling an operation of the flow battery, an energy storage device of a different type from the flow battery, And an energy conversion unit for converting the energy to the energy storage device.

The control unit may include a monitoring unit for monitoring the remaining capacity of the flow battery, a strip control unit for performing additional discharging of the flow battery according to the remaining capacity of the flow battery, and a control unit for controlling the driving of the power source And the control unit may drive the energy stored in the energy storage device.

The present invention has an effect of efficiently managing energy in an extended system including various renewable energy systems, considering characteristics of an energy storage device that can be combined with various renewable energy systems.

In addition, the present invention has the effect of increasing energy utilization efficiency without deteriorating performance of various kinds of energy storage devices such as a flow battery.

In addition, the present invention has the effect of recycling waste energy by storing the energy generated during the additional discharge of the flow battery with a separate energy storage device and using it when necessary.

In addition, since the energy generated during operation of the flow battery is stored in a separate battery and reused, the energy stored in the battery can be used to drive the power source of the battery management system and the flow battery. It is possible to provide a renewable energy management system capable of driving a battery management system (BMS) as a self-energy source in an environment where additional supply is difficult.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram showing a battery management system according to the present invention; FIG.
2 is a diagram showing the overall configuration of the battery management system of the present invention.
3 is a block diagram showing a control unit of the battery management system of the present invention.
4 is a diagram illustrating an overall flow chart of the present invention.
5 is a diagram illustrating a process of transferring energy generated in the additional discharge of the flow battery of the present invention to an energy storage device.
6 is a table showing characteristics according to metal ions according to an embodiment of the flow battery.
7 is a view showing a principle diagram according to an embodiment of a flow battery.
FIG. 8 is a table showing characteristics according to the embodiments of the secondary battery. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the following description of the embodiments of the present invention, specific values are only examples.

The present invention is based on an ESS (Energy Storage System) of a power system. The ESS is an energy storage device that stores electrical energy and uses it when needed to improve energy efficiency, improve the utilization of renewable energy, and stabilize the power supply system. ESS consists of PCS (Power Conditioning System), BMS (Battery Management System) and EMS (Energy Management System) for converting and managing the generated power.

The PCS is a power conversion device that converts between AC and DC, and converts voltage, current, and frequency. The PCS can be used to: 1) supply energy from a power plant to a load or charge it into a battery; 2) supply renewable energy such as sunlight and wind power to a load or charge the battery; 3) And supplies power to the bus and the power grid to perform power management.

The BMS is a battery management system that senses the voltage, current, and temperature of a battery to control the charge / discharge amount of the battery to an appropriate level, perform cell balancing of the battery, and determine the remaining capacity of the battery. In addition, the BMS protects the battery from emergency operation when a hazard is detected. In the present invention, as a battery management method, a technique of managing the total energy by recharging energy generated in discharging in a flow battery to an energy storage device such as a secondary battery and using the energy when necessary.

EMS is an energy management system that controls and monitors the production / conversion / consumption of electric power.

In addition, a battery management method and system based on a secondary battery using a flow battery and an energy storage device according to an embodiment of the present invention will be described with reference to the accompanying drawings. And the like. Accordingly, the secondary battery 162 of FIG. 1 and the energy storage 162 of FIG. 2 of the present invention correspond to each other.

The operation principle according to one embodiment of the flow battery is shown in Fig.

The flow battery includes two electrolyte tanks capable of storing electrical energy. Electrolyte tanks operate by storing a mixture of electrolyte and energy storage material and then pumping them into a current generating device. The power source (pump) serves to circulate the substance in the pump by external physical energy (for example, rotational kinetic energy, etc.).

The flow battery shown in FIG. 7 will be described in more detail. A flow battery includes a free-floating charged metal ion (a substance having free floating ions that conduct electricity) It is transferred from an external tank to an electrochemical cell to convert chemical energy into electricity. The difference in the characteristics of the flow battery according to the metal ions constituting the flow battery is shown in FIG. 6, and in the embodiment of the present invention, various kinds of batteries shown in FIG. 6 are all possible as the flow battery 161.

FIG. 6 shows an example of an iron-tin, iron-titanium, iron-chromium, vanadium-vanadium, sodium / bromine sulfur, Zinc-Bromine ) Zinc-cerium (Zinc-Cerium) is used as a component of a flow battery.

In addition, the flow battery is quickly charged / discharged by converting the opponent of the electrolyte, and further, the electroactive material can be continuously used repeatedly. To date, flow batteries are known to have a charge / discharge life of more than 14,000 times. The number of charge / discharge cycles of 14,000 times corresponds to a lifetime of 20 years or more in terms of time, and this lifetime is difficult to attain through general lithium-ion batteries.

As an embodiment of the energy storage device 162 of the present invention, a lithium-ion battery may be used as a secondary battery.

The life span of the energy storage device 162 of the present invention is shortened as the charging and discharging are repeated. However, when the flow battery is frequently charged and discharged, the performance deteriorates more rapidly. In a flow battery, kinetic energy transferred from a power source (pump, etc.) is converted into electrical energy through a chemical reaction. Therefore, when the battery is once charged, it is charged to the maximum capacity as much as possible. . ≪ / RTI > Also, in the case of a flow battery, when discharging to the lowest available capacity for the sake of operational efficiency, a so-called strip operation is performed in which the amount of charge is completely discharged to zero to remove residual metal ions deposited on the electrode. This strip operation is preferable for maintaining the efficiency and lifetime of the flow battery. Since the strip operation is energy consumed by the operation of the flow battery itself, rather than consuming energy from the load connected to the flow battery, It is called discharge.

Thus, it is an object of the present invention to provide a secondary battery which can be used for a long time and has a long life span and is required to be continuously charged for a considerable time at a time as compared with a secondary battery, and is capable of charge / discharge of the secondary battery, And the difference in the performance degradation due to differences in charging and discharging operations such as the characteristic that the battery can be reused as long as the electrochemical characteristics of the battery can be maintained.

1 is a block diagram of a battery management system according to an embodiment of the present invention. The EMS 110 includes a gateway 120, a PCS 130, a Master BMS 140, a Sub BMS 151, A BMS 152, a flow battery 161, and a secondary battery 162.

The Master BMS 140 manages the energy of an energy storage device such as the flow battery 161 and the secondary battery 162. At this time, the present invention recharges the secondary battery 162 with energy generated when an additional discharge is made in the flow battery 161. As one example of the embodiment of the present invention shown in Fig. 1, there is shown a case where battery management systems manage different types of batteries. For example, the energy of the battery can be managed by using the Sub BMS 151 that manages the flow battery 161 and the Sub BMS 152 that manages the secondary battery 162. At this time, a Master BMS 140 may be added to manage the respective sub BMSs 151 and 152 for managing the two batteries.

However, the spirit of the present invention is not limited to the embodiment shown in Fig. For example, although not shown in FIG. 1, an embodiment in which the flow battery 161 and the secondary battery 162 are managed in one BMS is also possible.

Some energy of the Master BMS 140 is supplied to the system after power conversion through the PCS 130. Also, the Master BMS 140 manages the energy supplied from the outside, and in an environment where it is difficult to receive extra energy from the outside, the Master BMS 140 itself operates as an energy source. The EMS 110 controls and monitors power generation / conversion / consumption with the outside. GateWay 120 serves as an intermediary in energy conversion and migration.

Hereinafter, a battery management system according to the present invention will be schematically described with reference to a block diagram showing the overall configuration of the present invention shown in Fig. 2 and the control unit of the present invention shown in Fig.

Prior to the description, the flow battery is a device that can store a lot of energy from a wind turbine, which converts the fluctuating output of the wind turbine and the unpredictable wind energy into a continuous and stable system.

That is, the flow battery 161 stores energy received from the power source 240 using the wind power transmission system 241, and in addition, various types of renewable and reusable systems such as a tidal power transmission system 242, And can store energy transmitted from the power source 240 using energy.

The controller 200 for controlling the operation of the flow battery includes a monitoring unit 300 for monitoring the remaining capacity of the flow battery 161 and a strip controller 310 for performing the additional discharge according to the remaining capacity of the flow battery 161 And a power source control unit 320 for controlling the driving of the power source of the flow battery 161.

When the additional discharge is performed in accordance with the remaining capacity of the flow battery 161, the controller 200 controls the energy storage unit 230 to store the energy generated during the additional discharge, Lt; / RTI >

In this case, according to the embodiment of the present invention, the energy conversion unit 230 may be implemented by one DC / DC converter. The voltage of one cell of the flow battery 161 is several volts (see FIG. 6, for example, for an ion-bromine flow battery, the voltage of one cell is 1.85 V), typically 40 to 60 cells are connected in series Type module, the voltage of the modularized flow battery 161 can generate a DC voltage of 0 to several tens of volts. Accordingly, the energy conversion unit 230 can transfer the energy of the flow battery 161 by lowering or boosting the voltage of the flow battery 161 to match the input voltage of the energy storage unit 162.

Alternatively, according to another embodiment of the present invention, the energy conversion unit 230 may include a first voltage conversion unit 231, an energy storage unit 232, and a second voltage conversion unit 233, as shown in FIG. 2 . The energy conversion unit 230 does not always transmit the energy of the flow battery 161 to the energy storage unit 162 but mainly transmits the energy discharged during the strip operation of the flow battery 161. [ In the strip operation, the voltage range of the flow battery 161 is maintained within a predetermined range, so that the energy conversion unit 230 may operate without any difficulty. However, when the strip operation is sufficiently advanced, the voltage of the flow battery 161 The operation efficiency of the normal DC / DC conversion circuit may be significantly lowered. In the case where the voltage of either one of the DC / DC conversion circuits is lowered to 0 V, there is a possibility that an unexpected overcurrent suddenly occurs. Therefore, the flow battery 161 and the energy storage device 162 are directly connected to one DC / It is possible to protect the charging operation of the energy storage device 162 from a sudden voltage / current change by providing an energy storing means 232 which serves as a buffer in the middle.

At this time, the energy storage means 232 may be implemented as one supercapacitor, for example, and the energy storage means 232 may be precharged to maintain the voltage level of the condition under which the strip operation is started. The second voltage converting means 233 can perform the step-up or step-down operation at a relatively constant voltage condition to maintain a high voltage conversion efficiency. The first voltage converting means 231 increases or decreases the voltage of the energy storage means 232 from the variable voltage of the flow battery 161 to transfer energy and when the voltage of the flow battery 161 approaches 0V The operation can be stopped and the energy storage means 232 and the energy storage device 162 can be electrically separated from the energy storage means 232. [

On the other hand, the energy generated during discharging rather than the additional discharge of the flow battery 161 is power-converted through the PCS 250 and then supplied to the power system 260.

The battery management system further includes a first control unit 210 for controlling and managing the operation of the flow battery 161 and a second control unit 220 for controlling and managing the operation of the energy storage unit 162, The battery 161 can be controlled and managed using the energy stored in the energy storage device 162 due to the additional discharge.

The battery management system can manage not only the flow battery 161 using only the energy received from the power source 240 but also using the energy supplied from the power system 260. [ Accordingly, when the energy is not supplied from the power system 260, the present invention manages the battery management system itself to be driven as an energy source.

Hereinafter, the present invention will be described in detail with reference to the entire flowchart of Fig.

First, in step S400, the monitoring unit 300 determines the remaining capacity of the flow battery 161. It is possible to determine whether an additional discharge process is necessary by observing the remaining capacity of the flow battery 161 in which charge / discharge is performed by the energy obtained from the power source 240 and the power system 260.

Step S410 determines whether or not the remaining capacity of the flow battery 161 has reached a preset lower limit. For convenience of explanation, the predetermined lower limit is a case where the remaining capacity of the flow battery 161 is 20% of the total capacity.

In step S420, when the remaining capacity is 20%, that is, when the remaining capacity of the flow battery 161 reaches a predetermined lower limit (S410-Y), the strip control unit 310 determines whether the additional discharge of the flow battery 161 . The additional discharge is an operation of completely discharging the amount of charge remaining in the flow battery 161 to zero, which is otherwise referred to as a strip operation. The strip operation is an operation for avoiding the shortening of the lifetime in consideration of the characteristics of the flow battery 161.

In step S430, the energy generated when the additional discharge of the flow battery 161 is performed is not wasted, but is transferred to the secondary battery, that is, the energy storage device 162. [ Step S440 charges the energy storage device 162 with the transferred energy. Since the flow battery 161 and the energy storage device 162 have different operating voltages and characteristics, it is very dangerous to directly transfer the energy. Therefore, the present invention can reduce the energy generated during the discharge of the flow battery 161 And a conversion unit 230 serving as a buffer for safely transmitting the energy to the energy storage device 162. This will be described in more detail with reference to Fig.

Step S430 may be performed by the operation of the energy conversion unit 230 as described above. In this case, according to an embodiment of the present invention, step S430 may be performed by one DC / DC converter. For example, referring to FIG. 6, in the case of an ion-bromine flow battery, when one cell has a voltage of 1.85 V and 40 to 60 cells are connected in series to form one modular flow battery 161, The voltage of the transistor 161 reaches 0 V to several tens V. The voltage of the flow battery 161 can be increased or decreased by the DC / DC converter to transfer energy to the energy storage device 162 as described in the description of FIG.

According to another embodiment of the present invention, the energy conversion unit 230 may include an energy storage unit 232 serving as a buffer in the middle, and two voltage conversion units (231, 233). If the energy conversion unit 230 includes the additional voltage conversion units 231 and 233 and the energy storage unit 232, step S430 may be subdivided into steps S431 to S434.

In step S431, the energy generated in the additional discharge is converted into a voltage by using the first voltage converting unit 231. [

In step S432, the voltage converted in step S431 is stored in the energy storage unit 232. [

The energy storage means 232 may be, for example, a supercapacitor. Compared to lithium-ion batteries, super-capacitors produce electricity through chemical reactions such as oxidation and reduction of cathode materials and anode materials, while super-capacitors generate electricity by physical adsorption and desorption on the surface of activated carbon. Therefore, supercapacitors have a much longer lifetime than lithium-ion batteries. Supercapacitors are safer than Li-ion batteries in that the anode and cathode materials are activated carbon. However, the super capacitor has a low energy density and low capacity. However, since the resistance is low and the output density is high and the response time is not long as 5-10 msec, a large amount of current can be stored in a short time.

In other words, the supercapacitor functions as an electrically rechargeable battery and collects the power and discharges it as needed. It is one of the essential parts for stable operation of the electronic circuit. Supercapacitors operate stably even after a long period of time in repeated charging and discharging environments. They are usually used to supply small power when the power is disconnected from the AC power supply.

Step S433 converts the energy stored in the energy storage means 232, i.e., the supercapacitor, by using the second voltage conversion means 233. Step S434 transfers the energy converted in step S433 to the energy storage device 162. [

For example, in the case of the ion-bromine flow battery 161 of the present invention, the cell voltage is 1.85 V in FIG. 6, and in the case of the energy storage device 161, In the case of the battery, it can be seen that the cell voltage is 3.06V. This is very dangerous in the case of direct energy transfer between the two batteries, so that the energy generated by the additional discharge of the flow battery 161 is securely transferred to the energy storage device 162 by buffering the difference voltage using the energy storage means 232 .

As shown in FIG. 8, since the voltage generated according to the type of the rechargeable battery (the type of the compound to be formed) varies from 1.2 V to 3.7 V, the voltage difference between the different types of batteries Additional energy storing means 232 for buffering and voltage converting means 231 and 233 for assisting the energy storing means 232 are frequently required to be introduced.

Step S440 charges the energy storage device 162 with the energy transferred in step S434. This has the effect of recycling wasted energy by not storing the energy generated during discharge of the flow battery 161 but storing it in the energy storage unit 162 and using it when necessary.

Step S450 controls and manages the operation of the flow battery 161 using the energy stored in the energy storage device 162 in step S440.

The second controller 220 for controlling the operation of the energy storage device 162 controls the energy storage device 162 using energy generated during the additional discharge of the flow battery 161. The second controller 220 controls the energy storage device 162 to maintain the remaining capacity at an appropriate level so as to supply electric power by discharging the energy storage device 162 when the energy storage device 162 is in an emergency And operation of the flow battery 161 can be minimized so that the operating efficiency of the flow battery 161 can be increased.

The energy stored in the energy storage device 162 not only controls the first control unit 210 that controls the operation of the flow battery but also controls the driving of the power source 240 of the flow battery 161.

In step S460, when the remaining capacity of the flow battery 161 has not reached the preset lower limit (S410-N), the general discharge of the flow battery 161 is progressed rather than the additional discharge of the flow battery 161 The PCS 250 converts the energy generated during the discharge into power.

Step S470 supplies the converted power through the PCS 250 to the system in step S460.

Accordingly, the present invention proposes a method of operating a battery management system using energy supplied from an external source (such as a power source and a system). In particular, The present invention proposes a battery management method of charging energy storage device 162 for reuse without wasting energy generated during discharge of flow battery 161 by providing a battery.

The battery management method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

161: Flow battery 162: Energy storage device
200:
210: first control unit 220: second control unit
230: energy conversion unit 231: first voltage conversion means
232: Energy storage means 233: Second voltage converting means
240: Power source
250: PCS 260: Power system

Claims (13)

A battery management method for an energy storage system including a flow battery,
Confirming a remaining capacity of the flow battery;
Determining whether an additional discharging process is required according to the remaining capacity of the flow battery;
If the additional discharging process is required, proceeding with the additional discharging process, acquiring energy from the flow battery in the additional discharging process, and transferring the energy to the energy storing device; And
Charging the transferred energy to the energy storage device;
Lt; / RTI > The method according to claim 1,
Controlling and managing the operation of the flow battery using energy charged in the energy storage device;
Further comprising the steps of: 3. The method of claim 2,
The step of controlling and managing the operation of the flow battery
And driving the battery management system of the flow battery using energy charged in the energy storage device
A battery management method characterized by 3. The method of claim 2,
The step of controlling and managing the operation of the flow battery
Driving the power source of the flow battery using energy charged in the energy storage device;
Further comprising the steps of: The method according to claim 1,
Transferring energy discharged from the flow battery to a power system through a power converter according to a remaining capacity of the flow battery;
Further comprising the steps of: The method according to claim 1,
The step of transferring the energy generated from the flow battery to the energy storage device
Using energy storage means disposed between the flow battery and the energy storage device
Wherein the battery management method comprises the steps of: The method of claim 6, wherein
The step of transferring the energy generated from the flow battery to the energy storage device
Converting a voltage of energy generated in an additional discharge process of the flow battery using first voltage conversion means disposed between the flow battery and the energy storage means and storing the converted energy in the energy storage means;
Further comprising:
And transferring the energy stored in the energy storage means to the energy storage device using the second voltage conversion means disposed between the energy storage means and the energy storage device
Wherein the battery management method comprises the steps of: A controller for determining the remaining capacity of the flow battery and controlling the operation of the flow battery;
An energy storage device of a different type from the flow battery; And
An energy conversion unit for converting energy generated in the additional discharge of the flow battery and delivering the converted energy to the energy storage device;
Lt; / RTI >
Wherein the control unit is driven using energy stored in the energy storage device. 9. The method of claim 8,
The control unit
A monitoring unit for monitoring the remaining capacity of the flow battery;
A strip controller for performing an additional discharge of the flow battery according to a remaining capacity of the flow battery; And
A power source control unit for controlling driving of a power source (pump) of the flow battery;
The battery management system comprising: 9. The method of claim 8,
The energy conversion unit
First voltage converting means for converting a voltage to store the energy generated in the additional discharge of the flow battery in the energy storing means;
Energy storing means for storing the energy converted by the first voltage converting means; And
Second voltage converting means for converting a voltage to transfer the energy stored in the energy storing means to the energy storing device;
And a battery management system. 10. The method of claim 9,
The strip control unit
And controlling the flow battery so that additional discharge of the flow battery is performed when the remaining capacity of the flow battery detected by the monitoring unit reaches a predetermined lower limit
The battery management system comprising: 10. The method of claim 9,
The control unit
The operation of the flow battery is controlled so that the energy generated during the discharge, rather than the additional discharge of the flow battery, is transferred to the power system using the power converter
The battery management system comprising: Confirming the remaining capacity of the flow battery;
Determining whether an additional discharging process is required according to the remaining capacity of the flow battery;
If the additional discharging process is required, proceeding with the additional discharging process, acquiring energy from the flow battery in the additional discharging process, and transferring the energy to the energy storing device; And
Charging the transferred energy to the energy storage device;
And a program for executing the battery management method including the program.

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