KR20220105379A - Energy storage system and operation method thereof - Google Patents

Abstract

The present invention relates to an energy storage system (ESS) and an operating method thereof. The ESS comprises: a plurality of battery packs; a plurality of power converters individually managing charging and discharging of the plurality of battery packs; and a system control device controlling the plurality of power converters to differently manage charge/discharge of each of the plurality of battery packs based on battery state data of each of the plurality of battery packs.

Description

ENERGY STORAGE SYSTEM AND OPERATION METHOD THEREOF

The present invention relates to an energy storage system (ENERGY STORAGE SYSTEM, ESS) and an operating method thereof, and more particularly, to a technology for managing a plurality of batteries having different lifespans.

Recently, with the rapid increase in the use of machines using large-capacity batteries, such as electric vehicles, the problem of disposing of batteries after use is gradually occurring. Batteries that are discarded in this way are not discarded because they cannot function as batteries, but are disposed of below the standard battery performance (60 to 70%) required by the machine in which the batteries are used. Therefore, a technology for efficiently recycling such a battery is required from an environmental and economic point of view.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a technology for differently managing the amount of charge/discharge power according to the performance of a battery.

It is also an object of the present invention to provide a technology for recycling a plurality of batteries that have already been used and discarded.

Another object of the present invention is to provide a technology for differently managing the amount of charge/discharge power in consideration of a difference in deterioration between batteries.

According to an aspect of the present invention, a plurality of battery packs; a plurality of power converters, each of which manages charging and discharging of a plurality of battery packs; and a system control device for controlling the plurality of power converters to differently manage charging and discharging of each of the plurality of battery packs based on battery state data of each of the plurality of battery packs.

In an embodiment, the battery state data includes state of health (SOH) information of each of the plurality of battery packs, and the system controller determines that the charge/discharge amounts of the plurality of battery packs are different according to the SOH information of each of the plurality of battery packs. A plurality of power converters can be controlled to be managed.

In one embodiment, the system control apparatus, based on the SOH information of each of the plurality of battery packs, the charge/discharge amount determiner for determining the amount of charge/discharge power of each of the plurality of battery packs; and a charge/discharge control unit configured to generate a control signal for controlling the plurality of power converters to differently manage charge/discharge of each of the plurality of battery packs according to the determined amount of charge/discharge power.

In an embodiment, the charge/discharge amount determining unit may determine the charge/discharge amount of power of each of the plurality of battery packs by differently distributing the total amount of power to be charged and discharged by the energy storage system according to the SOH ratio of each of the plurality of battery packs.

In an embodiment, the charge/discharge amount determiner may determine the amount of charge/discharge power of each of the plurality of battery packs by differently determining the C-Rate of each of the plurality of battery packs according to the SOH ratio of each of the plurality of battery packs during charging and discharging. .

In an embodiment, the battery state data may further include at least one of state of charge (SOC) information, voltage information, current information, and temperature information.

In an embodiment, the system control device further includes an SOH correction unit for correcting SOH information based on at least one of SOC information, voltage information, current information, and temperature information, and the charge/discharge wattage determining unit includes a plurality of units based on the corrected SOH. It is possible to determine the amount of charge/discharge power of each of the battery packs.

In an embodiment, the charge/discharge control unit generates a control signal for controlling the plurality of power converters to differently manage C-rates during charging and discharging of the plurality of battery packs so that the determined amount of charge/discharge power is charged in each of the plurality of battery packs and the plurality of power converters may control the inflow/outflow C-rate during charging and discharging of each of the plurality of battery packs according to the control signal.

In an embodiment, the system control apparatus may further include a communication unit that receives battery state data from each of the plurality of battery packs and transmits a control signal to each of the plurality of power converters.

In one embodiment, each of the plurality of battery packs includes a plurality of battery modules for charging and discharging power; and a BMS module that generates battery state information for a plurality of battery modules and transmits the battery state information to the system control device.

In an embodiment, the plurality of battery packs may be connected in parallel to an input/output terminal of the energy storage system.

In addition, according to another aspect of the present invention, there is provided an operating method of an energy storage system including a plurality of battery packs, a plurality of power converters, and a system control device, wherein the system control device is generating a control signal for controlling the plurality of power converters to manage charging and discharging of each of the plurality of battery packs differently; and managing, by the plurality of power converters, charging/discharging of each of the plurality of battery packs according to the control signal.

According to an embodiment of the present invention, it is possible to differently manage the amount of charge/discharge power according to the performance of the battery.

Further, according to another embodiment of the present invention, it becomes possible to recycle a plurality of batteries that have already been used and discarded.

In addition, according to another embodiment of the present invention, it is possible to differently manage the amount of charge/discharge power in consideration of a difference in deterioration between batteries.

1 is a view for explaining an energy storage system according to an embodiment of the present invention.
2 is a block diagram of a system control apparatus according to an embodiment of the present invention;
3 is a flowchart of a method of operating an energy storage system according to an embodiment of the present invention;
4 is a flowchart of a method of operating an energy storage system according to another embodiment of the present invention.
5 is a flowchart of a method of operating an energy storage system according to another embodiment of the present invention;
6 is a layout view of a plurality of battery packs and a plurality of power converters according to another embodiment of the present invention;
7 is a layout view of a plurality of battery packs and a plurality of power converters according to another embodiment of the present invention;
8 is a block diagram of a plurality of battery packs, blocks of a plurality of power converters, and a system control apparatus according to another embodiment of the present invention;

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail through the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that all modifications, equivalents and substitutes included in the spirit and scope of the present invention are included. In describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Also, as used herein and in the claims, the terms "a" and "a" and "a" are generally to be construed to mean "one or more" unless stated otherwise.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. do it with

1 is a diagram for explaining an energy storage system according to an embodiment of the present invention.

Referring to FIG. 1 , an energy storage system (ESS) 1000 manages charging and discharging of a plurality of battery packs 1100 and a plurality of battery packs 1100 capable of respectively charging and discharging power. It may include a plurality of power converters 1200 and a system control device 1300 for controlling the plurality of power converters 1200 .

The battery pack 1100 includes a plurality of battery modules (or battery cells) connected in series or parallel to charge and discharge power, and a Battery Management System (BMS) module that monitors the plurality of battery modules to generate battery status data. can do. Here, the battery state data may include information such as current, voltage, temperature, humidity, battery state of charge (SOC), and battery deterioration state (SOH) of the battery module. Here, since the BMS module is generally widely known and used, a detailed structure and operation thereof will be omitted.

In an embodiment, the plurality of battery modules include a lead-acid battery (Lead_Acid), a nickel-cadmium (Ni-Cd) battery, a nickel-hydrogen (Ni-MH) battery, a lithium ion (Li-ion) battery, and a lithium for charging and discharging power. It may be a secondary battery such as a polymer (Li-Polymer) battery.

In an embodiment, each of the plurality of battery packs 1100 may transmit battery state data to each of the plurality of power converters 1200 . For example, the BMS module of each battery pack 1100 transmits the battery state data of each battery pack 1100 to each of the plurality of power converters 1200 through wired/wireless communication means (eg, controller area network (CAN) communication). can be sent to

In an embodiment, the plurality of battery packs 1100 may be connected in parallel to the power input/output terminal 1400 (eg, the grid GRID) of the energy storage system 1000 .

In one embodiment, the charging and discharging power (or discharging rate (C-rate)) of each of the plurality of battery packs 1100 is the power input/output terminal 1400 of each of the plurality of battery packs 1100 and the energy storage system 1000 . ) may be managed differently by each of the plurality of power converters 1200 disposed between. For example, when the energy storage system 1000 charges 100 kW of power, the first battery pack 1100 is charged with 70 kW of power, which is disposed between the first battery pack 1100 and the power input/output terminal 1400 . The first power converter 1200 manages, and the second power converter disposed between the second battery pack 1100 and the power input/output terminal 1400 can manage the second battery pack 1100 so that 30 kW of power is charged. have.

In one embodiment, each of the plurality of battery packs 1100 may be an already used and discarded battery pack 1100 . Specifically, the plurality of battery packs 1100 included in the energy storage system 1000 according to an embodiment of the present invention are discarded after being used in an electric vehicle, etc. (1100). This is because one object of the present invention is to provide a technology for recycling a discarded battery. However, since the energy storage system 1000 according to the present invention can be applied even when the battery performance is unevenly deteriorated due to the use of the new battery pack 1100, the technical scope of the present invention is limited to recycling of an already used battery. it is not

The power converter 1200 is disposed between each battery module and the power input/output terminal 1400 of the energy storage system 1000, and the current (charge) flowing into each battery module according to the control signal of the system control device 1300 and Current (discharge) flowing from each battery module can be managed, and for this purpose, a switch configuration such as an open/close relay for connecting and disconnecting the battery module and the power input/output terminal 1400 may be included.

In one embodiment, the power converter 1200 may include a communication module for receiving a control signal from the system control device 1300, the communication module is a system control device (eg, CAN communication) in a wired/wireless communication (eg, CAN communication) method 1300) may receive a control signal.

In one embodiment, each of the plurality of power converters 1200 is charged at a C-rate according to a control signal received from the system control device 1300 at a C-rate during charging and discharging of each of the corresponding plurality of battery packs 1100 . In and out currents of each of the plurality of battery packs 1100 may be differently controlled to be discharged.

In one embodiment, each of the plurality of power converters 1200 is charged/discharged with the amount of charge/discharge power of each of the corresponding plurality of battery packs 1100 to the amount of power according to the control signal received from the system control device 1300 , Each of the battery packs 1100 may control the input and output currents differently.

In an embodiment, the power converter 1200 may step-up or step-down the voltage of the battery pack 1100 . For example, when the energy storage system 1000 intends to discharge power, if the voltage of some or all of the plurality of battery packs 1100 is lower than the reference voltage to be discharged of the energy storage system 1000 , the reference voltage Voltages of lower battery packs 1100 may be boosted.

In one embodiment, the power converter 1200 may include a bi-directional buck-boost converter circuit.

In an embodiment, the control signal may include current and voltage information of each of the plurality of battery modules during charging and discharging of the energy storage system 1000 .

The system control apparatus 1300 may control the overall operation of the energy storage system 1000 , such as controlling the plurality of battery packs 1100 and the plurality of power converters 1200 . A detailed description thereof will be described later with reference to FIG. 2 .

2 is a block diagram of a system control apparatus according to an embodiment of the present invention.

Referring to FIG. 2 , the system control apparatus 1300 may include a communication unit 2100 , an SOH correction unit 2200 , a charge/discharge amount determiner 2300 , and a charge/discharge control unit 2400 .

The communication unit 2100 may perform data communication with the plurality of battery packs 1100 and the plurality of power converters 1200 in a wired/wireless (eg, CAN communication) method. Specifically, the communication unit 2100 may receive battery state data from the plurality of battery packs 1100 and transmit a control signal to the plurality of power converters 1200 .

The SOH corrector 2200 may correct the SOH included in the battery state data received from each of the plurality of battery packs 1100 based on information such as voltage and current included in the state data. This is because the SOH measured by the BMS module included in each of the plurality of battery packs 1100 may be unreliable, particularly when the already used and discarded batteries are reused.

In an embodiment, the SOH corrector 2200 may include an SOC variation included in the state data, a voltage deviation between a plurality of battery modules (or battery cells), an internal temperature of the battery pack 1100 , and an internal temperature of the battery pack 1100 . SOH can be transformed by performing a sum operation with SOH again on the result of multiplying each of the deviations and the like by individual transform coefficients.

In an embodiment, the SOH corrector 2200 may calculate the SOH based on information on current, voltage, SOC, etc. included in the state data. At this time, since the calculation method used is already known and used, a detailed description thereof will be omitted.

In an embodiment, after the first charge/discharge of the energy storage system 1000 is finished, the SOH may be calibrated again before the second charge/discharge, or the SOH may be calculated again. This is because the SOH of each of the plurality of battery packs 1100 may be changed (eg, battery performance deterioration occurs) whenever the energy storage system 1000 is charged and discharged.

The charge/discharge amount determining unit 2300 may determine the charge/discharge amount based on the SOH. Specifically, the battery charge/discharge amount determiner 2300 may determine the amount of charge/discharge power of each of the plurality of battery packs 1100 based on the SOH or the corrected SOH included in the state data.

In an embodiment, the charge/discharge amount determining unit 2300 may determine the charge/discharge amount of power of each of the plurality of battery packs 1100 according to Equation (1).

)은 n 번째 배터리 팩(1100)의 SOH(

)를 복수의 배터리 팩(1100) t개의 총 SOH(

)로 나눈 값에 에너지 저장 장치가 충방전할 총 전력량(

)을 곱함으로써 결정될 수 있다. That is, the amount of power to be charged and discharged in the n-th battery pack 1100 (

) is the SOH(

) for a plurality of battery packs 1100 t total SOH(

) divided by the total amount of power to be charged and discharged by the energy storage device (

) can be determined by multiplying

In one embodiment, the charge/discharge amount determining unit 2300 determines the C-Rate during charging and discharging of each of the plurality of battery packs 1100 according to Equation 2, thereby determining the amount of charge/discharge power of each of the plurality of battery packs 1100 can decide

)는 n 번째 배터리 팩(1100)의 SOH(

)를 복수의 배터리 팩(1100) t개의 총 SOH(

)로 나눈 값에 에너지 저장 장치의 총 유출입 전류(

)를 곱합으로써 결정될 수 있다. That is, during charging and discharging, the C-Rate (

) is the SOH(

) for a plurality of battery packs 1100 t total SOH(

) divided by the total inflow and outflow current of the energy storage device (

) can be determined by multiplying

The charge/discharge controller 2400 may control the plurality of power converters 1200 so that the plurality of power converters 1200 manage the amount of charge/discharge power of each of the plurality of battery packs 1100 . Specifically, the charging/discharging control unit 2400 may charge and discharge each of the plurality of battery packs 1100 according to the charging/discharging power amount (or C-Rate) of each of the plurality of battery packs 1100 determined by the charging/discharging amount determining unit 2300 . A control signal for allowing each of the plurality of power converters 1200 to manage the inflow and outflow currents during discharge may be generated.

3 is a flowchart of a method of operating an energy storage system according to an embodiment of the present invention.

Hereinafter, the method of FIG. 3 will be described using the energy storage system 1000 shown in FIGS. 1 and 2 as an example, and thus the descriptions related to FIGS. 1 and 2 may also be applied to the method of FIG. 3 .

In step S3100, battery state data is received. Specifically, each of the plurality of battery packs 1100 may transmit battery state data to the system control device 1300 . The system control device 1300 may receive battery state data from a plurality of batteries.

In step S3200 , a charge/discharge amount of each of the plurality of battery packs 1100 is determined. Specifically, the system control device 1300 may determine the amount of power to be charged and discharged in each of the plurality of battery packs 1100 during charging and discharging of the energy storage device based on the battery state data.

In an embodiment, the system controller 1300 may determine the amount of power to be charged and discharged in each of the plurality of battery modules based on the SOH included in the battery state data. For example, the system controller 1300 may determine the total amount of power to be charged and discharged in the energy storage device according to the SOH ratio of each of the plurality of battery modules, and the amount of charge/discharge power of each of the plurality of battery modules. In addition, the system control device 1300 determines the total amount of power to be charged and discharged in the energy storage device according to the SOH ratio of each of the plurality of battery modules, and the C-Rate of each of the plurality of battery modules during charging and discharging of the energy storage system 1000 . By determining, it is possible to determine the amount of charge/discharge power of each of the plurality of battery modules.

In step S3300, the plurality of battery packs 1100 are charged and discharged. Specifically, the system control device 1300 controls the plurality of power converters 1200 to control the plurality of power converters 1200 so that each of the plurality of battery packs 1100 is charged and discharged with the determined amount of charge/discharge power. may be generated, and the generated control signal may be transmitted to the plurality of power converters 1200 . Each of the plurality of power converters 1200 may receive a control signal from the system control device 1300 , and may manage current during charging and discharging of each of the plurality of battery packs 1100 according to the received control signal. Each of the plurality of battery packs 1100 may perform charging/discharging according to the current managed by the plurality of power converters 1200 .

4 is a flowchart of a method of operating an energy storage system according to another embodiment of the present invention.

Hereinafter, the method of FIG. 4 will be described using the energy storage system 1000 shown in FIGS. 1 and 2 as an example, and thus the descriptions with respect to FIGS. 1 and 2 may also be applied to the method of FIG. 4 .

In operation S4100 , the system control device 1300 may receive battery state data including information such as SOH, current, voltage, and SOC from each of the plurality of battery packs 1100 .

In operation S4200, the system control device 1300 may correct the SOH included in the battery state data based on information on voltage, current, SOH, etc. included in the battery state data.

In operation S4300 , the system controller 1300 may determine the amount of charge/discharge power of each of the plurality of battery packs 1100 based on the corrected SOH.

In an embodiment, the system control device 1300 may determine the amount of power to be charged and discharged in each of the plurality of battery packs 1100 differently according to the corrected SOH of each of the plurality of battery packs 1100 .

In one embodiment, the system control device 1300 determines the C-Rate of each of the plurality of battery packs 1100 during charging and discharging based on the corrected SOH of each of the plurality of battery packs 1100, It is possible to determine the amount of power to be charged and discharged in each of (1100).

In operation S4400 , the system control device 1300 may manage the plurality of battery packs 1100 by controlling the plurality of power converters 1200 so that the plurality of power converters 1200 are charged and discharged with a determined amount of power. The plurality of battery packs 1100 may charge/discharge an amount of power determined according to the current managed by the plurality of power converters 1200 .

5 is a flowchart of a method of operating an energy storage system according to another embodiment of the present invention.

Hereinafter, the method of FIG. 4 will be described using the energy storage system 1000 shown in FIGS. 1 and 2 as an example, so that the description of FIGS. 1 and 2 may also be applied to the method of FIG. 5 .

In operation S5100 , the energy storage system 1000 may perform a primary charging/discharging operation in which each of the plurality of battery packs 1100 charges/discharges the determined charging/discharging power based on the corrected SOH.

In step S5200, battery state information is received. Specifically, the system control device 1300 may receive battery state data for each of the plurality of battery packs 1100 monitored during the first charge/discharge operation from each of the plurality of battery packs 1100 . The system control device 1300 may re-correct the pre-calibrated SOH based on battery state data for each of the plurality of battery packs 1100 monitored during the first charge/discharge operation.

In step S5300, the system control device 1300 determines the amount of power to be charged and discharged by each of the plurality of battery packs 1100 based on the corrected SOH again, and each of the plurality of battery packs 1100 charges and discharges the determined amount of power A control signal for controlling the plurality of managed power converters 1200 may be generated, and the generated control signal may be transmitted to the plurality of power converters 1200 . The plurality of power converters 1200 may control the current of each of the plurality of battery packs 1100 so that each of the plurality of battery packs 1100 charges and discharges the determined power. The plurality of battery packs 1100 may be charged and discharged according to currents controlled by the plurality of power converters 1200 .

6 is a layout view of a plurality of battery packs and a plurality of power converters according to another embodiment of the present invention.

Referring to FIG. 6 , a plurality of power converters 1200 may be connected in series to each other in the energy storage system 1000 according to the present invention, but even in this case, the plurality of battery packs 1100 may be used in the energy storage system 1000 . are connected in parallel to each other with respect to the input/output terminal 1400 of the .

7 is a layout view of a plurality of battery packs and a plurality of power converters according to another embodiment of the present invention.

Referring to FIG. 7 , in the energy storage system 1000 according to the present invention, the plurality of power converters 1200 may be disposed in a combination of series and parallel with each other, but even in this case, the plurality of battery packs 1100 They are connected in parallel to the input/output terminal 1400 of the energy storage system 1000 .

8 is a block diagram of a plurality of battery packs 1100, blocks of a plurality of power converters 1200, and a system control apparatus 1300 according to another embodiment of the present invention.

As shown in FIG. 8 , the plurality of battery packs 1100 , the blocks of the plurality of power converters 1200 , and the system control device 1300 include a processor 810 , a memory 820 , a storage unit 830 , and a user At least one element of the interface input unit 840 and the user interface output unit 850 may be included, and they may communicate with each other through the bus 860 . In addition, the plurality of battery packs 1100 , the blocks of the plurality of power converters 1200 , and the system control device 1300 may also include a network interface 870 for connecting to a network. The processor 810 may be a CPU or a semiconductor device that executes processing instructions stored in the memory 820 and/or the storage 830 . The memory 820 and the storage 830 may include various types of volatile/nonvolatile storage media. For example, the memory may include ROM 824 and RAM 825 .

Up to now, the present invention has been looked at focusing on the embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

1000: energy storage system
1100 : battery pack
1200 : power converter
1300: system control unit
1400: input/output terminal
2100: communication department
2200: SOH correction unit
2300: charge/discharge amount determining unit
2400: charge/discharge control unit

Claims (20)

a plurality of battery packs;
a plurality of power converters respectively managing charging and discharging of the plurality of battery packs; and
A system control device for controlling the plurality of power converters to differently manage charging and discharging of each of the plurality of battery packs based on battery state data of each of the plurality of battery packs
An energy storage system comprising a.
According to claim 1,
The battery state data includes SOH (State of Health) information of each of the plurality of battery packs,
The system control device,
An energy storage system for controlling the plurality of power converters so that charging and discharging amounts of the plurality of battery packs are managed differently according to SOH information of each of the plurality of battery packs.
3. The method of claim 2,
The system control device,
a charge/discharge amount determiner configured to determine an amount of charge/discharge power of each of the plurality of battery packs based on the SOH information of each of the plurality of battery packs; and
A charging/discharging control unit generating a control signal for controlling the plurality of power converters to differently manage charging/discharging of each of the plurality of battery packs according to the determined amount of charging/discharging power
comprising, an energy storage system.
4. The method of claim 3,
The charge/discharge amount determining unit,
By distributing a total amount of electric power to be charged and discharged by the energy storage system differently according to an SOH ratio of each of the plurality of battery packs, the amount of charge/discharge electric power of each of the plurality of battery packs is determined.
4. The method of claim 3,
The charge/discharge amount determining unit,
An energy storage system for determining the amount of charge/discharge power of each of the plurality of battery packs by differently determining the C-Rate of each of the plurality of battery packs according to the SOH ratio of each of the plurality of battery packs during charging and discharging.
6. The method of claim 4 or 5,
The battery state data further includes at least one of SOC (State of Charge) information, voltage information, current information, and temperature information,
The system control device,
Further comprising an SOH correction unit for correcting the SOH information based on at least one of the SOC information, voltage information, current information, and temperature information,
The charge/discharge power amount determining unit,
An energy storage system for determining the amount of charge/discharge power of each of the plurality of battery packs based on the corrected SOH.
4. The method of claim 3,
The charge/discharge control unit,
generating the control signal for controlling the plurality of power converters to differently manage a C-rate during charging and discharging of each of the plurality of battery packs so that the determined amount of charge/discharge power is charged in each of the plurality of battery packs;
The plurality of power converters control an inflow/outflow C-rate during charging and discharging of each of the plurality of battery packs according to the control signal.
4. The method of claim 3,
The system control device,
The energy storage system of claim 1, further comprising a communication unit receiving the battery state data from each of the plurality of battery packs and transmitting the control signal to each of the plurality of power converters.
According to claim 1,
Each of the plurality of battery packs,
a plurality of battery modules for charging and discharging power; and
BMS module for generating the battery state information for the plurality of battery modules, and transmitting the battery state information to the system control device
comprising, an energy storage system.
According to claim 1,
The plurality of battery packs,
An energy storage system connected in parallel with each other to input and output terminals of the energy storage system.

A method of operating an energy storage system comprising a plurality of battery packs, a plurality of power converters and a system control device, the method comprising:
generating, by the system control device, a control signal for controlling the plurality of power converters to differently manage charging and discharging of each of the plurality of battery packs based on battery state data of each of the plurality of battery packs; and
managing, by the plurality of power converters, charging and discharging of each of the plurality of battery packs according to the control signal
How to include.
12. The method of claim 11,
The battery state data includes SOH (State of Health) information of each of the plurality of battery packs,
The step of generating the control signal comprises:
Controlling the plurality of power converters so that the charging and discharging amounts of the plurality of battery packs are managed differently according to SOH information of each of the plurality of battery packs.
13. The method of claim 12,
The step of generating the control signal comprises:
determining the amount of charge/discharge power of each of the plurality of battery packs based on the SOH information of each of the plurality of battery packs;
and generating a control signal for controlling the plurality of power converters to differently manage charging and discharging of each of the plurality of battery packs according to the determined amount of charging/discharging power.
14. The method of claim 13,
The step of generating the control signal comprises:
The method of claim 1, wherein the energy storage system determines the amount of charge/discharge power of each of the plurality of battery packs by differently distributing the total amount of power to be charged/discharged according to the SOH ratio of each of the plurality of battery packs.
14. The method of claim 13,
The step of generating the control signal comprises:
A method of determining the amount of charge/discharge power of each of the plurality of battery packs by differently determining the C-Rate of each of the plurality of battery packs according to the SOH ratio of each of the plurality of battery packs during charging and discharging.
16. The method of claim 14 or 15,
The battery state data further includes at least one of SOC (State of Charge) information, voltage information, current information, and temperature information,
The step of generating the control signal comprises:
correcting the SOH information based on at least one of the SOC information, voltage information, current information, and temperature information,
A method of determining the amount of charge/discharge power of each of the plurality of battery packs based on the corrected SOH.
14. The method of claim 13,
The step of generating the control signal comprises:
generating the control signal for controlling the plurality of power converters to differently manage a C-rate during charging and discharging of each of the plurality of battery packs so that the determined amount of charge/discharge power is charged in each of the plurality of battery packs;
The step of managing the charging and discharging of each of the plurality of battery packs,
Controlling an inflow and outflow C-rate during charging and discharging of each of the plurality of battery packs according to the control signal.
14. The method of claim 13,
receiving the battery state data from each of the plurality of battery packs; and
and transmitting the control signal to each of the plurality of power converters.
12. The method of claim 11,
Each of the plurality of battery packs,
a plurality of battery modules for charging and discharging power; and
BMS module for generating the battery state information for the plurality of battery modules, and transmitting the battery state information to the system control device
A method comprising
12. The method of claim 11,
The plurality of battery packs,
connected in parallel to each other to input and output terminals of an energy storage system.

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