KR101635544B1 - Energy operating system - Google Patents

Abstract

An energy operating system of the present invention includes: an energy storage device which collects battery information from a battery cell connected to external power supply to charge a direct current (DC), a module consisting of a plurality of battery cells, and a sub rack consisting of a plurality of modules, and transmits the same; and an energy management device which receives state information of the battery cell and commands charging or discharging of the battery cell according to a constant control, manages data received from the energy storage device in real time, and provides an output screen of a user interface method to a user.

Description

[0001] ENERGY OPERATING SYSTEM [0002]

The present invention relates to an energy management system, and more particularly, to an energy management system in which battery information from a battery cell that is connected to an external power source to charge a DC current, a module that includes a plurality of battery cells, (RACK) unit, as well as real-time monitoring by cell unit and real-time monitoring up to module unit in which 10 cells are connected in series, The present invention relates to an energy management system capable of solving the problem of replacing the entire battery cell because it is impossible to measure status information between each cell when a certain cell fails.

Typically, a battery is charged into one unit. That is, a single battery charger charges all cells of a connected configuration, which is simple to implement but not efficient.

Typically, cells in a multi-cell battery do not have the same charge state before and after charging.

For example, if a cell has a higher charge state before charging, the cell can be overcharged by pulling the other cells to a full charge state, and even if the cell can be fully charged, It can not be fully charged, which is undesirable in any case.

When a plurality of battery cells are connected and used as one battery module, a voltage difference is generated between each single battery cell due to a chemical difference, a physical property difference, a difference in usage period, etc. of single battery cells constituting the battery module, Therefore, when a battery module is continuously used, a cell having a lower voltage among the battery cells becomes lower in voltage.

Thus, the life of the battery module is shortened due to the voltage difference between the battery cells, and at the same time, the entire battery packed in the packaged battery module must be replaced with a new battery module.

 Meanwhile, a battery management system has been proposed to more efficiently and stably manage a battery module having a battery cell such as a fuel cell. The battery management system is connected to a plurality of battery cells, reads voltage values of the battery cells, and determines and controls charging / discharging of the battery cells through an A / D converter and analysis.

 However, in the conventional battery management system, a single battery management system controls a plurality of battery cells, so that a delay occurs in managing each of the battery cells, and it is difficult .

As a result, the efficient management of each battery cell and the processing of charging / discharging are not fast, and it is difficult to grasp the defects such as defects and damages of each battery cell, so that the whole system may be deteriorated.

Korean Patent Publication No. 10-2014-0072965

According to an aspect of the present invention, there is provided a battery pack for a battery pack, which collects battery information from a battery cell that is connected with an external power source to charge a DC current, a module including a plurality of battery cells, Real-time monitoring can be performed not only on a rack basis but also on a per-cell basis real-time monitoring and a module unit in which 10 cells are connected in series, thereby performing only monitoring in a conventional rack unit The present invention provides an energy management system capable of solving the problem of replacing the entire battery cell because the state information between each cell can not be measured when some cells fail.

According to an aspect of the present invention, there is provided an energy management system including a battery cell for charging a DC current in association with an external power source, a module including the plurality of battery cells, and a sub- An energy storage device for collecting and transmitting battery information; And a controller for receiving the status information of the battery cell and commanding charging or discharging of the battery cell according to a predetermined control, managing data transmitted from the energy storage device in real time, and providing an output screen of a user interface And a management device.

The present invention not only improves the efficiency of the battery and deteriorates the performance of the battery, but also enables the optimal energy management, the maintenance and the failure prevention by the cell balancing function of the cell unit and the load balancing function of the module unit load source There is a technical effect that remote monitoring is possible.

FIG. 1 is a schematic view showing an energy management system using energy storage and management technology according to the present invention and a peripheral connection structure.
2A schematically shows a configuration of an energy operation system according to the present invention.
FIG. 2B shows a first embodiment of an energy management system using the energy storage and management technology according to the present invention.
Fig. 3A shows a configuration of a rack for an energy operating system according to the present invention in a first embodiment.
Fig. 3B shows a detailed configuration of the second sub rack of the configuration of Fig. 3A in the first embodiment.
4A shows a screen of a user interface scheme of the energy management system according to the present invention in a first embodiment.
4B shows a screen of a user interface scheme of the energy management system according to the present invention in a second embodiment.

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

FIG. 1 is a schematic view showing an energy management system using energy storage and management technology according to the present invention and a peripheral connection structure.

Referring to FIG. 1, an energy management system 100 using an energy storage and management technology according to the present invention is connected to a nearby DC renewable energy source 10 to be charged in an energy storage device, 20, and is charged into the energy management apparatus. The specific structure and functions thereof will be described later with reference to FIGS. 2A to 3B.

In this case, the DC renewable energy source 10 is a new energy source that replaces fossil fuels such as petroleum, coal, nuclear power, and natural gas. For example, solar energy, wind power, bio energy, waste energy, geothermal power, And renewable energy such as hydrogen energy, fuel cells, and coal liquefied gasification.

2A schematically shows a configuration of an energy operation system according to the present invention.

Referring to FIG. 2A, an energy management system 100 according to the present invention includes an energy storage device 110 and an energy management device 120. FIG.

The energy storage device 110 includes an M_BMU (Master Battery Management Unit) 111, a S_BMU (Slave Battery Management Unit) 112, and a battery cell 113.

The M_BMU 111 transmits and receives the battery information collected by the S_BMU 112 to the power management unit (PMU) 122, which is a so-called master battery management unit having a main type relationship with the slave battery management unit (S_BMU) And transfers some data (such as log data, etc.) directly to the energy management unit (EMS) 121.

The S_BMU 112 is a so-called slave battery management unit that has a master relationship with the master battery management unit (M_BMU) 111 and is capable of real-time transmission from a battery module composed of a battery cell 113 and a plurality of battery cells 113 Collects data (e.g., voltage, current, temperature, etc.) and transmits the collected data to M_BMU 111.

In this case, the BMU includes an S_BMU capable of cell unit management and an M_BMU (Master BMU) capable of collecting data of S_BMU, and one M_BMU 111 collects data of a plurality of S_BMUs 112.

The battery cell 113 is a space in which energy is stored. For example, the battery cell 113 is connected to the nearby DC renewable energy source 10 to charge the DC voltage and current, or the AC system power source 20 And charges the AC / DC converted voltage and current through the power management unit (PMU) 122.

A plurality of battery cells are assembled to form one module and a plurality of modules are assembled into one rack (Cell → Module → Rack) 3B.

The energy management apparatus 120 includes an energy management system (EMS) 121 and a power management unit (PMU) 122.

The energy management unit (EMS) 121 manages various data transmitted from the energy storage unit 110 and the power management unit (PMU) 122 in real time and provides a user interface (UI) A detailed description thereof will be described later with reference to Figs. 4A and 4B.

The power management unit (PMU) 122 is connected to the surrounding AC power source 20 and controls the energy management unit (PMU) 122 according to information on the AC system state (such as active power, reactive power, power factor, etc.) EMS 121 to charge or discharge the battery cell 113. The charge /

FIG. 2B shows a first embodiment of an energy management system using the energy storage and management technology according to the present invention.

Referring to FIG. 2B, an energy management system 100 using an energy storage and management technology according to the present invention includes an energy storage device 110 and an energy management device 120, (1) and a mobile terminal (2).

The energy storage device 110 includes the M_BMU 111 and the first module M-1 to the N-th module M-N.

The M_BMU 111 communicates with the first S_BMU 112-1 through the N_S_BMU 112-N via a communication interface such as a CAN (Controller Area Network) or an RS-485.

The first module M-1 includes first to fourth battery cells C1 to C4 managed by the first S_BMU 112-1 and the first S_BMU 112-1, Similarly, the N-th module MN includes a first to fourth battery cells C1 to C4 managed by the N-th S-BMU 112-N and the N-th S-BMU 112-N, respectively However, the present invention is not limited thereto, and can be implemented in various forms such as a connection method and a number as shown in FIG. 3B.

The energy management device 120 includes an EMS 121, a PMU 122, a power source 123, a sensing unit 124, a communication unit 125, and a display unit 126.

EMS 121 is a function that acts as a server for the energy management system 100 and may for example integrate battery cell information, BMU information, and data of PMU 122 and energy management device 120 via M_BMU 111 Performs data analysis and predefined policies, performs protocol conversion to perform user commands, and so on.

The PMU 122 measures the amount of charge power and the amount of discharge power on the same day by measuring the power information received through the communication interface such as Ethernet or RS-485 with the M_BMU 111 of the energy storage device 110, By performing power management such as charging or discharging of the energy management apparatus 120 according to a defined policy, battery efficiency and power efficiency are improved.

The power supply unit 123 receives power from AC 220V (single phase) or AC 380V (three phases) from the outside to allow the EMS 121, the PMU 122 and the communication unit 125 to operate.

The sensing unit 124 is connected to an external AC power supply 20 to measure active power and reactive power in three phases (R phase, S phase, and T phase) of the AC power source, To maintain balancing, measure the RS phase, ST phase, and TR phase voltage, and measure current amount, active power, reactive power and power factor for each phase.

The communication unit 125 has a function of linking the communication interface between the energy management apparatus 120 and the energy storage apparatus 110. For example, the communication between the energy management apparatus 120 and the energy storage apparatus 110 may be performed by RS- And the EMS 121 and the PMU 122 of the energy management apparatus 120 perform Ethernet communication using an Ethernet transceiver.

The display unit 126 displays the result of the processing performed by the EMS 121 on a screen. For example, a display device such as a user interface (UI) type LCD or an LED can be used.

The PC 1 is installed outside the energy management apparatus 120 and transmits and receives mutual data to and from the energy management apparatus 120 through an Ethernet or Wi-Fi communication interface.

The mobile terminal 2 remotely communicates with the energy management device 120 to transmit and receive data via a communication interface such as Wi-Fi or LTE.

FIG. 3A shows a configuration of a rack for an energy management system according to the present invention in a first embodiment, and FIG. 3B shows a detailed configuration of a second sub-rack in the configuration of FIG. 3A as a first embodiment .

3A, the energy management system 100 according to the present invention includes an energy storage device 110 including first to fourth sub racks R1 to R4, a PMU 122 First and second warning lamps 5 and 6 for indicating alarms of the energy storage device 110 and the energy management device 120 at an external upper end thereof, And a rack formed of first and second heaters 3 and 4 for raising the temperature when the temperature drops below a predetermined temperature.

The first sub rack R1 is provided with an M_BMU 111, an AC / DC converter (not shown), a DC / AC inverter (not shown), a secondary battery (not shown) and a current transformer .

In this case, the CT sensor for current measurement can be provided for each of the sub racks R1 to R4. However, since the current values flowing through the respective racks are the same, they are installed in the first sub rack R1, N, and R, S, and T in the case of three phases.

 On the other hand, as shown in FIG. 3B, the second to fourth sub racks R2 to R4 are connected to the first module M-1 to the fourth module M-4, And a peripheral sensing unit 30 to a fourth peripheral sensing unit 40.

The first module M-1 has a configuration in which the first S_BMU 112-1 and the first battery cell C1 through the tenth battery cell C10 are connected in series and the second module M- The fourth module (M-4) has the same manner as the first module (M-1).

In this case, each of the first battery cell C1 to the tenth battery cell C10 has a nominal voltage of 3.7 V, and a total of 37 V due to the serial connection of 10 of the first battery cell C1 to the tenth battery cell C10 is connected to each of the first module M- M-4), and a voltage of 148 V is formed across the four modules, and all the current flows at 75 Ah.

Here, it is preferable that the first to tenth battery cells C10 to C10 are connected in parallel for increasing the current capacity of the battery cells, but in order to be compatible with the voltage capacity of the PMU 120 using several hundreds of V- It is connected in series.

The first peripheral sensing unit 30 includes a first environmental sensor 31 and a first heat dissipating fan 32.

The first environmental sensor 31 senses the state of the surrounding environment such as the temperature and humidity of the first module M-1. When the first heat-dissipating fan 32 generates heat at a predetermined temperature or higher, To cool the heat, thereby protecting the battery cells (C1 to C10) of the first module (M-1).

Similarly, the second to fourth peripheral sensing units 40 to 40 may have the same configuration as that of the first peripheral sensing unit 30, And protects each battery cell (C1 to C10).

Referring now to Figures 2a-3b, each feature of the energy management process using the energy management system of the present invention will be described.

First, the energy management system 100 of the present invention basically collects data. When the EMS 121 requests information from the PMU 122 in a polling manner, the PMU 122 responds to the EMS 121 Critical data and event data on the site are notified to the EMS 121 regardless of the polling period.

Accordingly, when the energy management system 100 of the present invention requests the PMU ID, the PMU 122 transmits time information, operation status, charge / discharge status information, and battery voltage / current / active power information to the EMS 121 do.

(1) PMU and battery protection function

The PMU 122 transmits to the EMS 121 whether it is in a stop state or a run state which is an operation state. For example, when the operation state of the battery is checked and the preparation for conversion from DC to AC is completed, And transmits the operation state of the stop at the time of the reference state or less to the EMS 121.

In this case, when the PMU 122 transmits the operation state of the stop to the EMS 121, the PMU 122 does not operate when the state information of the battery is abnormal or the state information of the PMU 122 is abnormal, Thereby protecting the battery 122 and the battery.

(2) Charge / discharge level status measurement and automatic charge / discharge control function

The charging / discharging state of the battery cells is divided into four steps of charging and discharging.

For example, level 1 to 3 discharge can be set in advance by 5 kW discharge, 10 kW discharge, 15 kW discharge, etc., and level 4 indicates the end of discharge in the state that discharge is impossible.

The charging stage is also set to 5 kW charging, 10 kW charging, 15 kW charging, etc. for charging levels 1 to 3, and level 4 indicates the end of charging in a non-charging state.

Thus, the present invention is directed to a method of directly decreasing a command by charging 10 kW, discharging 15 kW, or the like in a user operation screen when determining charging or discharging of a conventional PMU, or by improving the problem caused by a risk that the charging and discharging amount is changed according to the operating environment .

In addition, since the charging and discharging disabled states of the present invention can improve the disadvantages that the operator must directly determine due to the usage amount values, the charging and discharging states can be stopped automatically at the level stage according to the preset level value It has the advantage of being able to operate.

Meanwhile, in the present invention, it is preferable that the capacity of the PMU is regularly unified so that the capacity can be directly inputted when charging / discharging is to be performed.

(3) Fault diagnosis function of AC power system status

The PMU 122 measures the voltage, current, frequency, and phase temperature of the AC system power supply 20 in real time, and sets each measured value as a constant section to perform a fault diagnosis.

For example, the minimum voltage Min and the maximum voltage Max are set so that an under voltage is determined to be equal to or less than the minimum value Min and an over voltage is determined to be equal to or greater than the maximum value Max. , And it is determined that the voltage between the minimum value (Min) and the maximum value (Max) is a normal voltage.

Since the current is not meaningful for the minimum current, only the maximum current is set, and when the maximum value is exceeded, the overcurrent is determined to be overcurrent.

The frequency can be set to the minimum value (Min) and the maximum value (Max), so that the diagnosis can be made in the same form as the voltage. In this case, the minimum value (Min) and the maximum value (Max) can be set to 50 Hz and 60 Hz, respectively.

Likewise, the minimum value (Min) and the maximum value (Max) of the temperature and phase between the PMU (122) are set to diagnose the fault data.

(4) Battery status information measurement function through BMU of energy storage device

3B, state information, module status information, and rack status information of the battery cells C1 to C10 can be measured through the respective S_BMUs 112-1 to 112-4, Hereinafter, the measurement and advantage of each state information will be described.

<Measurement of rack status information>

Each of the S_BMUs 112-1 to 112-4 stores RACK status information measured in real time by predetermined sensors (not shown) for each RACK ID (same as M_BMU ID), such as RACK Fault data of voltage, current, temperature, overcharge and overdischarge, door open state of rack, and rack cable state.

On the other hand, when an event such as a cable damage of the rack occurs after the status information of the rack is measured, the DC power switch supplied to the rack can be shut off to protect the rack. It is desirable to reduce the maintenance time and cost by remotely turning on the DC switch of the rack in case of trouble after the cause of damage of the rack cable is identified.

<Module status information measurement>

Each of the S_BMUs 112-1 to 112-4 includes module status information, temperature information, and heat dissipation fan status information together with RACK ID (same as M_BMU ID) and Module ID (same as S_BMU ID) To the M_BMU (111).

In this case, if the temperature is within a predetermined range based on the temperature information of the module, it is recognized as a normal state. If the temperature exceeds the predetermined temperature, the heat dissipating fans 32 - The battery cells C1 to C10 can be protected by releasing heat by lowering the temperature.

&Lt; Measurement of battery cell status information >

Each of the S_BMUs 112-1 to 112-4 includes a battery cell cell voltage, temperature information, and status information together with a RACK ID (same as M_BMU ID), a Module ID (same as S_BMU ID) , State of Charge (SOC), and State of Health (SOH) information to the M_BMU 111.

In this case, by measuring the voltage of the battery cell unit, the voltage is set to 3.2V and 4.2V, for example, based on the nominal voltage of 3.7V, and the voltage is measured in real time for each battery cell. And it is possible to prevent the total efficiency of the battery from being lowered at a certain temperature or lower.

Thus, the present invention can be applied not only to a rack unit but also to real-time monitoring up to a module unit in which 10 cells are connected in series and real-time monitoring per cell, Since it is possible to systematically manage the energy storage device 110 up to the rack unit, only the monitoring in the conventional rack (RACK) unit can be performed, so that the status information between each cell can be measured There is no need to replace the entire battery cell.

(5) Implement cell balancing and load balancing

Cell balancing refers to the function of setting the highest and lowest voltage of each cell as a reference voltage and finely controlling the voltage so that the voltage difference of each cell does not exceed the reference voltage to realize cell balancing. Load balancing refers to the ability to monitor the current of each module in real time, not per cell, and implement the balancing of the loads of each module by the current control of each module when the current of each module exceeds the reference current.

Cell balancing measures the number of cells in a module and, when it exceeds the allowable voltage range of a particular cell, drives a buck / boost circuit that adjusts the voltage level, For example, when a certain cell exceeds the allowable voltage range (eg, DC 4.2V), the buck circuit is driven to lower the voltage. Conversely, when the voltage falls below a certain level (eg, , DC 3.2V), and Booster circuit to increase the voltage, so that the optimal cell management in one module is possible.

Load balancing measures the status of multiple modules in a rack and distributes the current of each module in EMS (121) when the reference current of the specific module exceeds the reference current according to load usage. For the purpose of not exceeding the reference value, a buck / booster circuit is driven at the current stage to protect a number of modules present in one rack.

As a result, the present invention prevents cell efficiency improvement and performance degradation through a cell balancing function in a cell unit and a load balancing function in accordance with a load source on a module basis, as well as an optimal energy management, It has the advantage of remote monitoring.

(6) Characteristics of SOC and SOH measurement methods

1) Characteristics of SOC measurement method

The SOC (State of Charge) is a value indicative of the charged amount or the remaining capacity of the battery cell. The SOC measurement method will be described below.

First, there is a first step of initially setting the SOC value to 100% through the no-load voltage measurement in a fully charged state.

Next, a second step of firstly calculating the SOC value by real-time measuring the voltage of the battery according to the discharge time period according to the consumption of the constant load.

Next, the SOC value can be calculated as 100% at full charge and 0% at full charge based on the voltage, but in order to prevent battery protection and performance degradation, % Calculation, 80% charge ---> SOC 100%.

Next, the fourth step of finally transmitting the calculated SOC value to the EMS 121 is finally performed.

Next, the SOC estimation is performed at a cycle of 1 second and a fifth step of updating.

Accordingly, the present invention can calculate the SOC using only the voltage data, and uses the SOC second estimated value for protecting the battery performance due to the full charge and the full discharge of the battery. For example, the second calculated SOC is 100% or 0% The EMS 121 automatically turns on / off the switch in the battery cell to charge / discharge the battery, thereby physically preventing the user from intervening.

In the SOC calculation, only the voltage data is used in consideration of the fact that even if the data of the current and temperature sensors are applied, it may ultimately cause a voltage fluctuation. Therefore, the existing SOC calculation method such as the current integration method, It has an advantage that the SOC calculation can be more stably compared to the SOC calculation method using the current / temperature.

On the other hand, it is desirable that the user can directly operate the charging / discharging of the battery from the operational aspect, except for the SOC 100% and the SOC 0%.

2) Characteristics of SOH measurement method

The SOH (State of Health) is a value indicating the remaining life of the battery cell. The SOH can be used to notify the replacement time of the battery in advance through the SOH measurement. Hereinafter, the SOH measurement method will be described.

Firstly, there is a first step of discharging the fully charged battery cell to the end and measuring the capacity of the battery to set the SOH.

Next, a second step of calculating a relative value of the battery capacity measured according to charge / discharge based on the SOH set on the basis of the initial capacity of the battery to the first SOH.

Next, there is a third step of measuring the internal impedance and the temperature value in the environment where the actual battery is installed, and correcting the primary SOH value and updating it to the secondary SOH.

Next, the fourth step of finally transmitting the SOH value, which is calculated secondarily, to the EMS 121.

Next, the SOH estimating step has a fifth step of measuring and updating at a cycle of 1 second.

In this case, the SOH value is measured and transmitted using only the value of one day from 00:00 to 24:00 every day since the SOH value and the arithmetic mean can be generated. Therefore, when the SOH value is reset after 1 day, .

Thus, the present invention measures SOH in units of cells rather than in units of racks or modules, and when a battery cell is replaced, it is replaced by a specific cell in a cell-by-cell SOH calculation. It is possible to solve the inconvenience of increase in cost and maintenance caused by replacing the battery for each module in the conventional case.

(7) Measurement and utilization of impedance of battery cell

Impedance of the battery cell is calculated according to Ohm's law through real-time current and voltage monitoring, and the calculated impedance value is used to update the SOH.

In addition, according to the present invention, by measuring the impedance of the battery cell, it is possible to protect the battery cell by a power protection function when detecting a sudden change in internal resistance in the battery cell.

4A shows a screen of a user interface scheme of the energy management system according to the present invention in a first embodiment.

Referring to FIG. 4A, when a voltage, a current, a temperature, and the like are selected in a chart on a screen of a user interface method of the energy management system according to the present invention, they can be represented by a chart for each selected item.

For example, when the user clicks on the voltage item for a long time, the voltage data is not displayed, and when the temperature item is clicked long, the temperature information is not displayed.

Likewise, when the user clicks the voltage item again, the voltage information is displayed again, allowing the user to freely display the information to be displayed.

On the other hand, when the icon is selected, it can be expressed in the form of a tachometer shown in the upper part of FIG. 4A.

 For example, in case of voltage, select the tachometer icon, map the name / unit of the property, set the input point to import data, output point to export, set data max / min range and item When the tachometer is set after storing the tachometer (for example, 10, 20, etc.), the tachometer shown in the top leftmost figure of FIG. 4A is formed. In this case, The resolution is automatically adjusted.

As with the method of forming the tachometer icon of the voltage, the tachometer icon can be formed with respect to the current, the remaining amount, and the temperature. In this case, the size and coordinates of the tachometer icon can be changed in detail setting of the attribute.

 Thus, the present invention has an advantage that, when the entire information is displayed on the screen, the information to be compared and the change in the trend are easily compared.

4B shows a screen of a user interface scheme of the energy management system according to the present invention in a second embodiment.

Referring to FIG. 4B, when information such as a voltage per unit cell, a current, and the like is selected as data in a screen of a user interface method of the energy management system according to the present invention, the data is filled in a coordinate space (blank) , The numeric data information updated by the polling period is updated.

In this case, the size of the item-specific data is mapped to the size set in the dictionary text, and if the size of the data information is changed, the size of the data is automatically changed when the size of the predefined text is changed.

As shown in FIG. 4B, in the output screen, the magnitudes of the voltages of the cells 01 to 10 according to the respective modules 01 to 13 are displayed in the respective blanks, and the minimum value, the maximum value, the average value, Information was provided with.

Thus, according to the present invention, all data items to be transmitted / received can be classified into icons, charts, data, and status information, and library information can be displayed to display consistent information on all data. The display screen can be changed and operated according to the situation.

In addition, the present invention increases the readability of data by adjusting the position and size of the coordinate space, and can operate like a different system by displaying different data for each site in spite of one identical system, Deletion / modification of the data.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

100: Energy operating system
110: Energy storage device
111: M_BMU
112: S_BMU
113: Battery cell
120: Energy management device
121: Energy Management Department (EMS)
122: Power Management Unit (PMU)
123:
124:
125:
126:
10: DC renewable energy source
20: AC grid power

Claims (9)

An energy storage device for collecting and transmitting battery information from a battery cell that is connected to an external power source to charge a direct current (DC) current, a module in which a plurality of battery cells are gathered, and a sub rack in which a plurality of modules are gathered; And
An energy management unit for receiving status information of the battery cell and instructing charge or discharge of the battery cell according to a predetermined control, managing data transmitted from the energy storage unit in real time, Device,
The energy storage device includes:
A plurality of battery cells in which a direct current (DC) current is charged or discharged according to a constant control;
A plurality of slave battery management units (S_BMU) collecting and transmitting battery information from the plurality of battery cells in real time; And
And a master battery management unit (M_BMU) that has a master relationship with the slave battery management unit (S_BMU) and transmits battery information collected by the slave battery management units (S_BMU) to the energy management apparatus,
The sub-
Wherein the modules comprise a slave battery management unit (S_BMU) and battery cells connected in series,
The battery information includes:
Battery cell status information, module status information, and sub-rack status information,
The battery cell status information includes:
(SOC) and state of health (SOH) information of a battery cell and is transmitted together with a RACK ID, a Module ID, and a Cell ID information,
The battery module status information includes:
Module status, temperature, and heat dissipation fan status information, transmitted with RACK ID and Module ID information,
The sub rack status information includes:
(RACK) voltage, current, temperature, overcharge and overdischarge fault data, door open status of a rack and a rack cable status, together with RACK ID information Lt; / RTI &
Wherein the output screen comprises:
And a tachometer icon for voltage, current, remaining amount, and temperature.
delete The system according to claim 1, wherein the plurality of slave battery management units (S_BMU)
A plurality of battery cells are connected in series to form a module,
Further comprising an ambient sensing unit installed adjacent to the module for sensing a state of the surrounding environment and then discharging the heat to the outside when the sensed temperature exceeds a preset reference value. 4. The apparatus of claim 3,
An environmental sensor for sensing temperature and humidity of the module; And
And a heat dissipation fan for cooling the heat by operating a fan when the temperature sensed by the environment sensor exceeds a preset reference value. 2. The energy management system according to claim 1,
A power management unit (PMU) for receiving battery status information from the energy storage device and commanding charging or discharging of the battery cells according to a certain control;
And transmits a control signal instructing the PMU to charge or discharge the battery cells, and provides an output screen of a user interface scheme to the user Energy Management Department (EMS); And
And a communication unit for providing a communication interface between the energy management device and the energy storage device. delete delete delete delete

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