KR101538232B1 - Battery Conditioning System and Battery Energy Storage System Including That Battery Conditioning System - Google Patents

Abstract

A battery management apparatus according to one aspect of the present invention that can stably supply control power of a battery management apparatus without power supply from a system includes a battery management apparatus for storing surplus energy provided in the system, A plurality of battery modules for storing the surplus energy at the time of charging and providing the stored energy to the system at the time of discharging; A first management module for monitoring a state of the battery module and controlling a charge / discharge operation of the battery module; an initial charge module for preventing an inrush current by initially charging the battery module; And a power supply for supplying the output voltage to the first management module and the initial charge module as control power through an output terminal by transforming an input voltage input from the plurality of battery modules through an input terminal and generating an output voltage, And a module.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery management system and a battery energy storage system including the battery management system.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery energy storage system, and more particularly, to a power supply of a battery management apparatus included in a battery energy storage system.

With the development of the industry, electric power demand is gradually increasing, and the gap between day and night, season, and day is widening.

Recently, many techniques for reducing the peak load by utilizing surplus power of the system have been developed rapidly. For example, among these technologies, a battery which stores surplus power of the system in the battery, It is a battery energy storage system.

The battery energy storage system stores surplus electric power generated at night, surplus electric power generated from renewable energy such as wind power and solar light in the battery, and supplies power stored in the battery to the system when a peak load or a system accident occurs. This will stabilize the system power unstably fluctuating by the renewable energy source and achieve maximum load reduction and load leveling.

In particular, such a battery energy storage system can be used in an electric vehicle as well as in an intelligent grid (Smart Grid) which has recently been emerging due to the emergence of various renewable energy sources.

Hereinafter, the configuration of such a battery energy storage system will be briefly described with reference to FIG.

1 is a block diagram schematically illustrating the configuration of a general battery energy storage system. 1, the battery energy storage system 100 includes a battery conditioning system (BCS) 110 and a power conditioning system (PCS) 120.

The battery management apparatus 110 includes a battery system 112 composed of a plurality of batteries so that the surplus energy provided from the system 130 is stored in the battery system 112, And supplies energy stored in the battery system 112 to the system at the time of occurrence. The battery management device 110 includes a battery system 112 for storing energy, a HVAC 114 for battery constant temperature and humidity and a fire suppression module 116 for preparing for a fire do.

The power management apparatus 120 plays a role of linking the system (not shown) with the battery management apparatus 110. More specifically, the power management apparatus 120 plays a role of charging surplus energy of the system to one or more batteries included in the battery management apparatus 110 or providing energy stored in one or more battery racks to the system. At this time, the power management apparatus 120 includes a switchgear (SWGR) 122 for interrupting power to the system and inputting power supplied from the system, a transformer (TR) 124 for boosting / , A power conversion unit (PCU) 126 for converting DC into AC, and a cooling system 128. [

In the case of the battery management apparatus 110 of the battery energy storage system 100 having the above-described configuration, the control power source for the operation of the battery management apparatus 110 is a system And is supplied through at least one of the switchboard 220 and the uninterruptible power supply (UPS) 230. At this time, a control power source for driving the battery system 112 and the fire fighting module 116 of the battery management device 110 is supplied from the system 210 through the switchboard 220 and the uninterruptible power supply device 230, The control power for driving the power supply 114 is supplied from the system 210 through the switchboard 220. [

Therefore, in the case of a general battery management apparatus having a structure as shown in FIG. 2, there is a problem in that it can not be installed in a place where power supply from the system is impossible, and a backup time of an uninterruptible power supply It is impossible to supply the control power to the battery management apparatus, which makes it impossible to use the battery management apparatus, and the battery energy storage system can not be used.

The present invention has been made to solve the above-mentioned problems, and it is a technical object of the present invention to provide a battery management apparatus capable of stably supplying control power of a battery management apparatus without power supply from the system, and a battery energy storage system including the same .

The present invention also provides a battery management apparatus capable of supplying control power of the battery management apparatus using an internal battery included in the battery management apparatus, and a battery energy storage system including the same.

According to an aspect of the present invention, there is provided a battery management apparatus including a plurality of battery racks for storing surplus energy provided from a system and supplying stored energy to the system, The battery rack includes a plurality of battery modules that store the surplus energy upon charging and provide the stored energy to the system during discharging; A first management module for monitoring a state of the battery module and controlling a charge / discharge operation of the battery module; an initial charge module for preventing an inrush current by initially charging the battery module; And a power supply for supplying the output voltage to the first management module and the initial charge module as control power through an output terminal by transforming an input voltage input from the plurality of battery modules through an input terminal and generating an output voltage, And a module.

According to another aspect of the present invention, there is provided a battery energy storage system including: a battery management device that stores surplus energy provided from a system and supplies stored energy to the system; And a power management device for charging the surplus energy to the battery management device or providing the system with the energy stored in the battery management device, wherein the surplus energy is charged or the stored energy is discharged A first management module for monitoring a state of the plurality of battery modules and controlling a charging and discharging operation of the plurality of battery modules, and a control module for controlling an input voltage inputted from the plurality of battery modules through an input terminal, And a power supply module for generating an output voltage to supply the output voltage to the first management module via the output terminal to the control power supply; And an air conditioning module that operates by using a voltage provided from the system through a distribution board as a control power source and controls temperature and humidity of the plurality of battery modules.

According to the present invention, since the control power of the battery management apparatus is supplied using the internal battery included in the battery management apparatus, the battery management apparatus can be stably operated without power supply from the system.

Further, according to the present invention, since the control power of the battery management apparatus can be supplied without power supply from the system, the battery energy storage system can be installed even at a place where power supply from the system is impossible, There is an effect that the constraint can be minimized.

Further, according to the present invention, since the control power supply of the battery management apparatus can be supplied without power supply from the system, the system power outage time becomes longer and the battery management apparatus can be stably operated even if external power supply is impossible. The reliability of the energy storage system can be improved.

Further, according to the present invention, since the control power source of the battery management apparatus is not supplied from the system, the uninterruptible power source apparatus for transmitting the voltage provided from the system to the battery management apparatus is not required or can be miniaturized, The design of the battery energy storage system can be simplified, and the battery energy storage system can be miniaturized.

1 is a block diagram schematically illustrating the configuration of a conventional battery energy storage system;
FIG. 2 is a block diagram schematically showing a configuration for supplying control power to the battery management apparatus shown in FIG. 1. FIG.
3 is a block diagram schematically illustrating a configuration for controlling power supply of a battery management apparatus according to an embodiment of the present invention;
FIG. 4 is a block diagram showing the configuration of the battery management apparatus shown in FIG. 3 in more detail; FIG.
5 is a graph showing charge / discharge characteristics of a battery.
6 is a block diagram specifically showing a configuration of the power supply module shown in FIG.
7 is a block diagram schematically showing the configuration of the power management apparatus shown in FIG.

The meaning of the terms described herein should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

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

3 is a block diagram illustrating a configuration of a battery energy storage system according to an embodiment of the present invention.

As shown in FIG. 3, the battery energy storage system 300 according to an embodiment of the present invention includes a renewable energy source such as wind power, sunlight, or the like, or an energy source (Hereinafter, referred to as " source ") to charge the battery included in the battery energy storage system 300 and to discharge the power charged in the battery during a peak load or system failure to the system to supply power to the system Function.

The battery energy storage system 300 mainly includes a battery management device 310 and a power management device 320. In addition, the battery energy storage system 300 may further include an electrical switchboard 330 and an uninterruptible power supply (UPS) 340. In FIG. 3, the battery energy storage system 300 includes one battery management apparatus 310 for convenience of explanation. However, in the modified embodiment, the battery energy storage system 300 is a single example. And may include a plurality of battery management apparatuses 310.

First, a battery management system (BCS) 310 stores surplus power supplied from the system 350 in a plurality of batteries, and when a peak load or a system fault occurs, a plurality of batteries The stored energy is supplied to the system.

Hereinafter, the configuration of the battery management apparatus 310 will be described in more detail with reference to FIGS. 3 and 4. FIG.

4 is a circuit diagram showing the configuration of the battery management apparatus 310 in more detail.

3 and 4, the battery management device 310 includes one or more battery racks 360, a control device 370 for controlling one or more battery racks, a fire protection module 380, And an air conditioning module 390.

In FIG. 3, a solid line indicates a power supply relationship between the modules, and a dotted line indicates a report signal or a control signal including monitoring results transmitted and received between the modules.

First, one or more battery racks 360 include a battery module 362, a fan 363, an initial charging module 364, a first management module 366, and a power supply module 368.

4, a plurality of batteries 410 connected in series are packed. In the battery rack 360, a plurality of battery modules 362 are stacked do.

This battery module 362 stores the surplus energy of the system upon charging and provides the stored energy in the system upon discharge.

The fan 363 is for controlling the temperature of the battery module 362. The fan 363 may be provided for each of the plurality of battery modules 362 or separately for each battery module 362. [

The initial charging module 364 may be configured such that when the battery rack 360 or the battery module 362 is newly connected to the battery management device 310 or a voltage unbalance occurs between the battery racks 360 during operation of the battery management device 310 Thereby preventing an inrush current that may be generated due to a voltage difference between the battery racks 360. [

Here, the inrush current is generated due to the voltage unbalance between the battery racks 360 connected in parallel. As a result, current exceeding the capacity of the device flows to the device due to the inrush current, have.

Particularly, when the battery is implemented as a lithium ion battery, since the dynamic voltage and the open circuit voltage (OCV) in the charging and discharging state are different from each other, the battery rack 360 is connected in parallel In case of connection, inrush current must be generated.

In order to prevent such an inrush current, the battery racks 360 to be connected in parallel may be individually charged so that the voltages of all the battery racks 360 are equalized. However, It takes a considerable amount of time to replace the battery, and in the case of the terrestrial battery energy storage system, the system downtime may be prolonged, resulting in a large economic loss.

Accordingly, the present invention is characterized in that the initial charging module 364 initializes each battery 410 included in the plurality of battery modules 362 during a time period before the battery energy storage system 300 reaches a normal state, (Pre-Charging) to minimize the voltage difference between the battery racks 360, thereby preventing the occurrence of an inrush current.

This initial charging module 364 includes a main switch 422, a first resistor 424, and a charging switch 426, as shown in FIG.

The main switch 422 is for connecting a plurality of battery modules 362 to the power management apparatus 320 and is off during a time period before the battery energy storage system 300 reaches a normal state. ), And when the battery energy storage system 300 reaches a normal state, it is turned on to connect the plurality of battery modules 362 to the power management apparatus 320.

The plurality of battery modules 362 connected to the power management device 320 through the main switch 422 are charged and discharged by the power management device 320.

Next, the first resistor 424 and the charging switch 426, which are connected in series with each other, are connected in parallel to the main switch 422. At this time, the charging switch 426 connects the first resistor 424 and the plurality of battery modules 362.

Specifically, the charging switch 426 is kept on for a time period before the battery energy storage system 300 reaches a steady state, and is connected to the plurality of battery modules 362 And the power management unit 320 are connected to each other to allow the batteries 410 included in the plurality of battery modules 362 to be initially charged.

Then, when the battery energy storage system 300 reaches a normal state, the charging switch 426 is turned off.

When the battery rack 360 is connected to the power management apparatus 320, the battery rack 360 having the lowest open circuit voltage (OCV) among the battery racks 360 is connected to the power management apparatus 320 ). ≪ / RTI >

In the above-described embodiment, it has been described that the inrush current is prevented by using an analog method of adding a circuit configuration to the battery rack 360. [

However, in the modified embodiment, in order to prevent the generation of the inrush current in a digital manner, the voltage of each battery rack 360 connecting the N battery racks 360 in parallel is supplied to each battery rack 360 The voltage may be sequentially connected to the power management unit 320 starting from the battery rack 360 having the lowest voltage after monitoring through the first management module 366.

In this case, since the voltage of the battery rack 360 becomes the dynamic voltage DV and the open circuit voltage (OCV) according to the priority, it is possible to prevent the voltage deviation between the dynamic voltage and the open circuit voltage It should be measured and controlled.

For example, when a first battery rack having an SOC of 70% -3.8 V and a second battery rack having an SOC of 55% -3.2 V are connected in parallel, an inrush current is generated according to a voltage unbalance. To prevent this, the second battery rack is first connected to the power management device 320 and then charged with energy. At this time, when the voltage of the first battery rack and the voltage of the second battery rack are equal to each other as a result of monitoring the voltages of the first battery rack and the second battery rack, the voltage deviation between the dynamic voltage and the open circuit voltage Thereby connecting the first battery rack to the power management device 320. [

In the above-described embodiment, it has been described that the inrush current is prevented by using any one of the digital system and the analog system. However, in a modified embodiment, it is possible to prevent the inrush current by applying both of these two methods.

For example, the battery racks 360 having a voltage difference smaller than the reference value are controlled using a digital method, and a battery rack having a voltage difference larger than a reference value among the battery racks 360 is controlled in an analog manner .

That is, the battery racks 360 having a voltage difference larger than the reference value among the battery racks 360 are connected to the power management device 320 at the same time, the initial charging module 364 is connected first to minimize the inrush current, The battery racks 360 having the voltage difference smaller than the reference value are connected to the power management unit 320 sequentially from the battery rack 360 having a small voltage, and the SOC (State of Charge) The voltage deviation between the circuit voltages is measured and reflected in the control.

The initial charging module 364 may be used to newly connect the battery rack 360 or the battery module 362 to the battery management device 310 or to connect the battery rack 360 during operation of the battery management device 310. [ The battery rack 360 can prevent an inrush current that may be generated due to a voltage difference between the battery racks 360. [ However, the present invention is not limited thereto. The initial charging module 364 may prevent an inrush current generated when the battery management device 310 is connected to the power management device 320 for the first time.

The first management module 366 is included in each of the battery racks 360 to monitor the status of the plurality of battery modules 326 included in the battery rack 360, The first management module 366 monitors at least one of voltage, current, SOC, and temperature of each battery 410 included in the plurality of battery modules 326 The status of the plurality of battery modules 326 can be monitored.

Next, the power supply module 368 receives the output voltage from the plurality of stacked battery modules 326, and supplies the output voltage to the control power source for the operation of the battery management device 310.

Specifically, the power supply module 368 converts an input voltage input from a plurality of battery modules 326 through an input terminal to generate an output voltage, and outputs the output voltage to the fan 363, the initial charge module 364 And the first management module 368 as control power.

In one embodiment, the power supply module 368 supplies the DC voltage output from the plurality of battery modules 362 to the fan 363, the initial charge module 364, and the first management module 368 And a DC-DC converter (convertor) for transforming and outputting a DC voltage.

That is, in the case of the conventional battery management apparatus, the control power for driving the lower components included in the battery management apparatus is supplied through the system, the uninterruptible power supply (UPS), and the switching mode power supply (SMPS) The control power for driving the lower components is transmitted to the plurality of battery racks 360 through a power supply module 368 included in each battery rack 360. In this case, Are directly supplied from the battery modules 362.

Hereinafter, the configuration of the power supply module 368 will be described in more detail with reference to FIG.

6 is a block diagram illustrating an electrical configuration of a power supply module 368 according to an embodiment of the present invention.

6, a power supply module 368 according to an embodiment of the present invention includes an input terminal 610, a filter 620, a power device 630, a transformer 640, a rectifier 650, And an output terminal 660.

First, the input terminal 610 is connected to positive (P) and negative (N) ends of a plurality of stacked battery modules 362 and directly receives a direct current voltage from the plurality of battery modules 362. The input terminal 610 may receive a DC voltage ranging from a minimum of 500 V to a maximum of 1300 V so as to cover a DC voltage (for example, 600 V to 1000 V) output from the plurality of battery modules 362 .

Next, the filter 620 filters the input voltage input through the input terminal 610 to remove the surge voltage, the inrush current, and the EMI (Electro Magnetic Interference).

Next, the power device 630 is turned on and off according to a PWM (Pulse Width Modulation) control signal so that the voltage filtered by the filter 620 is selectively applied to the transformer 640. The power device 630 may be implemented as a switching device such as a MOSFET (Metal Oxide Silicon Field Effect Transistor). In one embodiment, the power supply module 368 may further include a PWM controller 670 that generates a PWM signal to supply a PWM control signal to the power device 630.

Next, the transformer 640 reduces the voltage filtered by the filter 620 according to a predetermined winding ratio, and outputs the reduced voltage.

In one embodiment, the transformer 640 is constituted by a three-winding transformer as shown in FIG. 6 to reduce the filtered voltage applied to the primary winding 642 to a first secondary winding 644, and reduces the filtered voltage applied to the primary winding 642 to the second secondary winding 646 according to the second winding ratio.

Next, the rectifier 650 smoothes the voltage reduced by the transformer 640 to generate the output voltage, and outputs the output voltage to the output terminal 660.

In one embodiment, the rectifier 650 includes a first rectifier 652 coupled to the first secondary winding 642 and smoothing the voltage output to the first secondary winding 642 to produce a first output voltage, And a second rectifier 654 connected to the second secondary winding 646 and smoothing the voltage output to the second secondary winding 646 to generate a second output voltage.

At this time, the first output voltage and the second output voltage may be different levels, but may be the same level.

The output terminal 660 is then connected to the fan 363, the initial charge module 364 and the first management module 366 to provide the output voltage generated by the rectifier 650 to the fan 363, Module 364, and first management module 366 as control power.

The output terminal 660 is connected to the first rectifier 652 and is connected to the first output terminal 662 for outputting the first output voltage and the second rectifier 654 to output the second output voltage And a second output terminal 664 for outputting.

The first output terminal 662 is connected to the initial charge module 364 and the first management module 366 to provide the first output voltage to the initial charge module 364 and the first management module 366. A second output terminal 664 is coupled to the fan 363 to provide a second output voltage to the fan 363. [

The reason why the present invention separates the output stage 660 into the first output terminal 662 and the second output terminal 664 is that the noise generated by the fan 363 is reduced by the first management module 366).

In the above-described embodiment, the output terminal 660 is described as being composed of the first output terminal 662 and the second output terminal 664. However, in a modified embodiment, the output terminal 660 is connected to the first output The terminal 662 and the second output terminal 664 may be configured as one single port. According to this embodiment, the rectifier 650 also comprises only one of the first rectifier 652 and the second rectifier 654.

Meanwhile, the value of the capacitance included in the output terminal 660 according to the present invention is the value of the hold-up time (when the power is not supplied through the input terminal 610, the output voltage is maintained at the output terminal 600) Is to be designed to cover the time for reporting failure information from the first management module 366 to the second management module 372. [

In one embodiment, the power supply module 368 described above may further include a relay 680 as shown in FIG.

The relay 680 includes an input voltage input through the input terminal 610, a first output voltage output through the first output terminal 662, a second output voltage output through the second output terminal 664, Converts the temperature of the power device 630 into a digital value, and feeds back the digital value to the first management module 366.

In accordance with this embodiment, the first management module 366 monitors the state of the power supply module 368 using the input voltage, the output voltage, and the temperature of the power device 630 delivered from the relay 680, If it is determined that an abnormality has occurred in the power supply module 368 as a result of the monitoring, the operation of the power supply module 368 can be stopped.

In one embodiment, the relay 680 may communicate the first output voltage, the second output voltage, and the digital value for the temperature of the power device 630 to the first management module 366 in the form of a contact.

The battery management system 310 may further include a control switch 690 located between the power supply module 368 and the plurality of battery modules 362 for controlling the operation of the power supply module 368.

The control switch 690 is turned off under the control of the first management module 366. The plurality of battery modules 362 and the power supply module 368 are connected through the control switch 690 when the control switch 690 is on so that the output voltage of the plurality of battery modules 362 is supplied to the power supply module 368 When the control switch 690 is turned off under the control of the first management module 366, the connection between the plurality of battery modules 362 and the power supply module 368 is cut off, The output voltage of the battery modules 362 is not applied to the power supply module 368. [

Particularly, when the maintenance of the battery rack 360 and the control device 370 is required, the control switch 690 is turned off through the first management module 366 so that the output voltage of the plurality of battery modules 362 The control power supply to the battery rack 360 and the control device 370 can be cut off by not being applied to the power supply module 368.

3 and 4, the controller 370 includes a second management module 372 and a controller 374, and the second management module 372 includes a plurality of battery racks 360, And the controller 374 controls the operation of the second management module 372, the fire prevention module 380, and the air conditioning module 390 Thereby controlling the overall operation of the battery management device 320. [

The second management module 372 and the controller 374 included in this control device 370 can also be controlled by a plurality of battery modules 362 included in the control device 370 without being supplied with control power from the system 350 As shown in FIG. To this end, the control device 370 receives control power from a power supply module 368 included in a battery rack 360 disposed at a position closest to the control device 370 among the plurality of battery racks 360 . The control device 370 may be connected to the first output terminal 662 of the power supply module 368 to receive the first output voltage from the first output terminal 662 as the control power.

According to such a configuration, the control device included in the conventional battery management device is required to receive the control power through the system, the uninterruptible power supply (UPS), and the SMPS. However, in the case of the control device 370 according to the present invention, Since the control power is directly supplied through the power supply module 368 included in the controller 360, it is possible to omit a separate configuration such as the SMPS and the uninterruptible power supply for supplying the control power.

The second management module 372 and the controller 374 included in the control device 370 in the foregoing embodiment are arranged in the vicinity of the battery rack 360 disposed nearest to the control device 370 among the plurality of battery racks 360. [ The control power is supplied from the power supply module 368 included in the power supply unit 360. In a modified embodiment, the control device 370 further includes a separate power supply module (not shown) having a configuration as shown in Fig. 6, and can receive control power from the power supply module. At this time, the power supply module included in the controller 370 may be provided with input power from a plurality of battery modules 362 disposed at the positions closest to the controller 370 among the plurality of battery racks 360.

Referring again to FIGS. 3 and 4, the fire control module 380 operates under the control of the controller 374 to control the occurrence of fire inside the battery management device 310. FIG. In one embodiment, such a fire fighting module 380 is operated by receiving control power from the system 350 via the switchboard 330 and the UPS device 340, as shown in FIGS. 3 and 4 .

The fire control module 380 receives control power from the system 350 through the switchboard 330 and the uninterruptible power supply 340 in the above embodiment. However, in the modified embodiment, when the battery management apparatus 310 supplies the control power to the fire prevention module 380 only during the time period during which the battery management apparatus 310 performs the charge / discharge operation, the fire prevention module 380 is connected to the system The control power can be directly supplied from the control unit 350. Therefore, according to this embodiment, the battery management apparatus 310 can omit the UPS device 340 entirely, thereby simplifying the system design as well as downsizing.

The air conditioning module 390 controls the temperature and humidity of the plurality of battery modules 362 included in the battery management device 310 under the control of the controller 374. [ 3 and 4, the air conditioning module 390 operates by receiving control power from the system 350 through the switchboard 330.

As described above, the battery management apparatus 310 according to the present invention is configured such that the control power of the lower facilities is not supplied from the outside through the system 350 but is supplied to the plurality of battery modules 362 included in the battery module 362 The following effects can be obtained as compared with a general battery management apparatus.

First, since the control power of the battery management apparatus is supplied through the system, the uninterruptible power supply apparatus, and the SMPS in the case of a general battery management apparatus, the design for power supply of the battery management apparatus is complicated. However, Since the power supply module 368 transforms the voltage output from the plurality of battery modules 362 included in the power supply module 310 and directly supplies power to the respective facilities as the control power supply, Can be simplified.

Second, since the battery management apparatus according to the present invention is not structured to receive the power supply of the battery management apparatus from the outside, its structure is simplified, and at the same time, the influence from the outside is eliminated, thereby improving reliability and efficiency.

Thirdly, the wiring for receiving the control power from the outside based on the battery rack is not required, and only the communication wiring is left, so that the internal wiring of the battery management device can be simplified.

Fourth, since the control power of the battery management device is directly supplied from a plurality of batteries included therein, the size of the UPS is minimized or may be omitted altogether, thereby miniaturizing the battery energy storage system. Particularly, It is possible to supply the control power to the battery management apparatus even in a situation where the supply is not possible, so that the battery condition can be monitored.

Referring again to FIG. 3, the power management apparatus 320 plays a role of linking the battery management apparatus 310 and the system 350. More specifically, the power management apparatus 320 may charge one or more battery racks 360 included in the battery management apparatus 310 with surplus energy of the system 350 or store the energy stored in one or more battery racks 360 System 350, as shown in FIG.

Hereinafter, a power management apparatus according to the present invention will be briefly described with reference to FIG.

7 is a diagram illustrating an electrical configuration of a power management apparatus according to an embodiment of the present invention.

7, the power management apparatus 320 according to the present invention includes a first circuit breaker 710, a transformer 720, and one or more power conversion units (PCUs) 730 .

First, the first circuit breaker 710 functions to prevent a fault current from flowing into the system 350 or into the power conversion module 730 when an accident occurs. The first circuit breaker 710 also serves to connect or disconnect the battery energy storage system 300 to the system 350.

Next, the transformer 720 reduces the AC voltage of the system 350 to a predetermined value and supplies it to the power conversion module 730, or boosts the AC voltage output from the power conversion module 730 to a predetermined value System 350, as shown in FIG.

Next, the power conversion module 730 converts the alternating current into direct current and supplies it to the battery management device 310, or converts the direct current supplied from the battery management device 310 into alternating current and outputs the alternating current to the transformer 720.

This power conversion module 730 includes a second circuit breaker 731, a filter 733, an inverter 735, a smoothing capacitor 737, and a third switch 739.

First, the second circuit breaker 731 functions to prevent a fault current from flowing into the system 350 or into the power conversion module 730 when an accident occurs. The second circuit breaker 731 also serves to connect or disconnect the power conversion module 370 to the system 350.

The filter 733 serves to reduce the harmonics of the reduced AC voltage through the transformer 720 or to reduce the harmonics of the AC voltage output from the inverter 735.

In Fig. 7, this filter 733 is shown as being of the LCL type, but this is only an example, and other types of configurations are possible.

The inverter 735 converts the AC voltage output from the filter 733 into a DC voltage or converts a DC voltage supplied from the battery management device 310 into an AC voltage.

The smoothing capacitor 737 performs a role of smoothing the DC voltage input from the battery management device 310 to the inverter 735 or the DC voltage output from the inverter 735. The voltage of the smoothing capacitor 737 must be charged in advance to prevent an inrush current from being generated when the battery management apparatus 310 is connected to the power management apparatus 320. [

If the smoothing capacitor 737 is not charged when the battery management apparatus 310 is connected to the power management apparatus 320, an inrush current may be generated and the element may be destroyed or a fire may occur.

In order to prevent this, the power management apparatus 320 according to the present invention further includes an initial charge module (not shown), thereby preventing an inrush current from being generated when the smoothing capacitor 737 is charged.

The third switch 739 serves to connect the battery management device 310 to the power management device 320.

3, the switchboard 330 is connected to the system 350 to supply the power provided from the system 350 to the uninterruptible power supply 340 and the air conditioning module 390, and the uninterruptible power supply 340, Provides power to the fire fighting module 380 via the switchboard 330. In one embodiment, since the fire suppression module 380 can receive control power directly through the switchboard 330, the uninterruptible power supply 340 in this case can be omitted.

3, the battery energy storage system 300 determines whether a plurality of battery modules 362 included in the battery management device 310 are charged or discharged, 310) and an integrated controller (not shown) for controlling the operation of the power management device 320. [

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

For example, in the above-described embodiment, the power supply module 368 supplies control power only to each sub-facility in the battery management device 310. However, in a modified embodiment, It may be possible to supply the control power of each sub equipment included in the power management device 320 by using the DC voltage provided from the battery management device 310 by including it in the management device 320 as well.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

300: battery energy storage system 310: battery management device
320: power management device 330: switchboard
340: Uninterruptible power supply 350: System
360: Battery rack 370: Control device
390: air conditioning module 380: fire fighting module

Claims (13)

And a plurality of battery racks for storing surplus energy provided from the system and supplying the stored energy to the system,
Wherein the battery rack includes:
A plurality of battery modules for storing the surplus energy at the time of charging and providing the stored energy to the system at the time of discharging;
A first management module for monitoring a state of the battery module and controlling charge / discharge operations of the battery module;
An initial charging module for initially charging the battery module to prevent an inrush current; And
A power supply module that transforms an input voltage input from the plurality of battery modules through an input terminal to generate an output voltage and supplies the output voltage to the first management module and the initial charge module through the output terminal, / RTI >
Wherein the initial charging module comprises:
A main switch for connecting the plurality of battery modules to a power conditioning system (PCS); And
And a charging switch connected in series to the resistor, wherein the plurality of battery modules are connected to the power management apparatus in parallel before being connected to the main switch, And an initial charging unit for charging the battery. The method according to claim 1,
The battery management device includes:
A second management module for controlling a first battery management module included in the plurality of battery racks; And
Further comprising a controller for controlling an operation of the second management module,
Wherein the second management module and the controller receive the output voltage from the power supply module included in the battery rack closest to the second management module and the controller among the plurality of battery racks to the control power supply. Management device. The method according to claim 1,
Wherein the plurality of battery racks further include a fan for temperature control of the battery module,
Wherein the power supply module supplies the output voltage to the fan as a control power via the output terminal. The method of claim 3,
Wherein the output voltage comprises a first output voltage and a second output voltage,
Wherein the output terminal includes a first output terminal coupled to the first management module and the initial charge module, and a second output terminal coupled to the fan,
Wherein the power supply module provides the first output voltage to the first management module and the initial charge module via the first output terminal and provides the second output voltage to the fan through the second output terminal The battery management apparatus comprising: delete The method according to claim 1,
The power supply module includes:
A filter for filtering the input voltage inputted through the input terminal to remove surge voltage and EMI;
A transformer for reducing the voltage filtered by the filter according to a predetermined winding ratio and outputting the reduced voltage;
A power device for selectively applying a voltage filtered by the filter to the transformer, the power device being turned on and off according to a PWM control signal; And
And a rectifier for smoothing the voltage reduced by the transformer to generate the output voltage and outputting the output voltage through the output terminal. The method according to claim 6,
The transformer is constituted by a three-winding transformer, so that the filtered voltage applied to the primary winding is reduced in accordance with the first winding ratio to output to the first secondary winding, and the filtered voltage is reduced according to the second winding ratio, Side winding,
The rectifier includes:
A first rectifier connected to the first secondary winding for generating a first output voltage by smoothing the voltage output to the first secondary winding and outputting the first output voltage through a first output terminal; And
And a second rectifier connected to the second secondary winding for generating a second output voltage by smoothing the voltage output to the second secondary winding and outputting the second output voltage through a second output terminal The battery management apparatus comprising: The method according to claim 1,
The battery management device includes:
Further comprising a control switch for turning on / off the connection between the input terminal of the power supply module and the plurality of battery modules. The method according to claim 1,
The power supply module includes:
And a relay for converting the input voltage, the output voltage, and the temperature of the power device included in the power supply module into a digital value and feeding back the digital value to the first management module,
Wherein the first management module monitors the state of the power supply module or the plurality of battery states using the input voltage, the output voltage, and the power device temperature of the power supply module transmitted from the relay Management device. A battery management device that stores surplus energy provided from the system and supplies stored energy to the system; And
And a power management device for charging the battery management device with the surplus energy or providing energy stored in the battery management device to the system,
The battery management device includes:
A plurality of battery modules for charging the surplus energy or discharging the stored energy, a first management module for monitoring the states of the plurality of battery modules and controlling the charging and discharging operations of the plurality of battery modules, One or more battery racks including a power supply module that transforms an input voltage input from a plurality of battery modules to generate an output voltage, and supplies the output voltage to the first management module via the output terminal; And
And an air conditioning module that operates by using a voltage provided from the system through a switchboard as a control power source and controls temperature and humidity of the plurality of battery modules,
Wherein the battery rack includes:
A main switch for connecting the plurality of battery modules to the power management device; And a charging switch connected in series to the resistor and connected in parallel to the main switch to connect the plurality of battery modules to the power management device before the main switch is turned on, Further comprising an initial charging module including an initial charging section for charging the battery. 11. The method of claim 10,
The battery management device includes:
Further comprising a fire control module for controlling fire occurrence in the battery management device,
Wherein the fire suppression module is operated by directly supplying a voltage provided from the system through the switchboard for a period of time during which the plurality of battery modules perform charge and discharge operations. 11. The method of claim 10,
The battery management device includes:
A second management module for controlling the first management modules included in the one or more battery racks; And
Further comprising a controller for controlling operations of the second management module and the air conditioning module,
Wherein the second management module and the controller receive the output voltage from the power supply module included in the battery rack closest to the second management module and the controller among the one or more battery racks to the control power supply. Energy storage system. 11. The method of claim 10,
Wherein the at least one battery rack further comprises a fan for temperature control of the battery module,
Wherein the output voltage comprises a first output voltage and a second output voltage,
Wherein the output terminal includes a first output terminal coupled to the first management module and a second output terminal coupled to the fan,
Wherein the power supply module provides the first output voltage to the first management module via the first output terminal and provides the second output voltage to the fan through the second output terminal. Energy storage system.

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