KR20150135843A - Hybrid energy storage system and method of contolling the same - Google Patents

Abstract

The present invention relates to a hybrid energy storage system and a control method thereof. According to an embodiment of the present invention, the hybrid energy storage system includes: an energy control battery system including multiple battery racks; a power control battery system including the battery racks; a battery management system for managing the energy control battery system and the power control battery system; an electricity conversion system controlling charge and discharge of the energy control battery system and the power control battery system, converting a DC electricity in the energy control battery system and the power control battery system into an AC electricity, and converting the AC electricity of the outside to the DC electricity; and an energy management system controlling an operation of the battery management system and the electricity conversion system. Therefore, the hybrid energy storage system has a wide usable voltage area, since high power can be charged or discharged, and the life of a battery can be extended. The hybrid energy storage system also can be easily maintained and repaired, and can be operated when one battery system malfunctions. Moreover, the hybrid energy storage system can maintain the battery in an optimal operation state since the charge and discharge between the battery systems are possible without influencing an AC system.

Description

[0001] The present invention relates to a hybrid energy storage system and a method of controlling the hybrid energy storage system,

The present invention relates to a hybrid energy storage system and a control method thereof.

Energy Storage System (ESS) is a system that can store generated power and supply power in a stable manner according to demand pattern. It is a system that stores excess power generated by a power plant and temporarily supplies power when the power is insufficient. It says.

An energy storage system is a "power reservoir" that stores electricity on a large scale and is used when necessary. It is a technology that stores electric power in an energy storage means to supply the remaining power and energy to the required time and place. The energy storage system stores energy in an energy storage means such as a large secondary battery instead of directly transmitting the power generated by a power plant to a home or a factory, generates power at the time and place where the power is most needed, .

The energy storage system includes a battery system including a plurality of battery racks, a battery management system (BMS), a power conversion system (PCS), and an energy management system (EMS) .

The battery management system is for managing the battery system. The power conversion system is connected to a grid, which is a power grid, to convert a direct current into an alternating current, or alternatively, For controlling the charge and discharge of the battery, and the energy management system is for controlling the battery management system and the power conversion system in consideration of the load, the battery condition, and the like.

Generally, the voltage of a battery included in a battery system rises when charged and falls when discharged. Particularly, even if the battery is charged at a high C-rate (C-rate) even if the battery is in the same voltage (SOC) state, the voltage rise becomes larger than when the battery is charged at a low charge / discharge rate. In addition, even if the same voltage state is discharged, when the battery is discharged at a high charge / discharge rate, the voltage drop width becomes larger than when discharging at a low charge / discharge rate.

Therefore, an energy storage system operated with a large power such as new and renewable energy and frequency adjustment, that is, a high charge / discharge ratio, can not be charged at a high charge / discharge rate at a high voltage and discharged at a high charge / I can not.

The patent literature described in the following prior art documents discloses a hybrid energy storage device and method that enables energy flow between various multiple energy stores as a single bi-directional DC / DC converter. However, the following patent documents are not easy to maintain the system, can not be operated if one battery system fails, and can not charge / discharge between battery systems without affecting the AC system.

Therefore, it is possible to charge or discharge a high power so that a usable voltage range can be widened, the life of the battery can be extended, the maintenance of the system is easy, the operation can be performed even when one battery system fails, There is a need for an energy storage system capable of charging / discharging the battery system without affecting the battery system to maintain the battery in an optimal operating state.

KR 10-1373566 B1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery charger that can charge or discharge a high power so that a usable voltage range can be widened and the life of the battery can be extended and the maintenance of the system is easy, And to provide a hybrid energy storage system capable of charging / discharging between battery systems without affecting the AC system so as to maintain the battery in an optimal operating state.

Another problem to be solved by the present invention is to provide a battery pack capable of charging or discharging a high power so that a usable voltage range can be widened, the life of the battery can be extended, the maintenance of the system is easy, The present invention also provides a control method of a hybrid energy storage system capable of charging / discharging between battery systems without affecting the AC system, thereby maintaining the battery in an optimal operating state.

According to an aspect of the present invention, there is provided a hybrid energy storage system,

An energy control battery system including a plurality of battery racks;

A power control battery system including a plurality of battery racks;

A battery management system for managing the energy control battery system and the power control battery system;

Controlling the charging and discharging of the energy control battery system and the power control battery system to convert the DC power of the energy control battery system and the power control battery system to AC power and the external AC power to DC power, system; And

And an energy management system for controlling operations of the power conversion system and the battery management system.

In a hybrid energy storage system according to an embodiment of the present invention, battery cells included in a plurality of battery racks of the energy control battery system include battery cells having high energy density, and a plurality of batteries The battery cells included in the rack may include battery cells with high power density.

Further, in the hybrid energy storage system according to an embodiment of the present invention, the power control battery system may further include a DC-DC converter for converting a DC voltage of the plurality of racks to a predetermined DC voltage.

In addition, in the hybrid energy storage system according to an embodiment of the present invention, when the operation of a high charge / discharge ratio is required at a predetermined charge-discharge rate or more, operation of the DC-DC converter and the power conversion system Discharging is performed by using the power control battery system, and when operation below the predetermined charge / discharge rate is required, the operation of the power conversion system is controlled to perform charge / discharge using the energy control battery system .

Also, in the hybrid energy storage system according to an embodiment of the present invention, the energy management system may control the operation of the power conversion system when a high charge / DC converter and the power conversion system so that power over the first reference level is used to charge and discharge the battery using the power control battery system. Discharging operation using the energy control battery system by controlling the operation of the power conversion system when operation less than the predetermined charge and discharge rate is required.

In addition, in the hybrid energy storage system according to an embodiment of the present invention, in order to maintain the energy control battery system and the power control battery system in an optimal state, The charge and discharge can be performed between the energy control battery system and the power control battery system by controlling the operation of the power conversion system and the DC-DC converter based on the state information of the control battery system and the power control battery system.

In a hybrid energy storage system according to an embodiment of the present invention,

An energy control battery system including a plurality of battery racks;

A power control battery system including a plurality of battery racks;

A battery management system for managing the energy control battery system and the power control battery system;

A first power conversion system for controlling charging and discharging of the energy control battery system, converting a DC power of the energy control battery system to AC power and an external AC power to DC power;

A second power conversion system for controlling charging and discharging of the power control battery system, converting a DC power of the power control battery system to AC power and an external AC power to DC power; And

And an energy management system for controlling operations of the first power conversion system, the second power conversion system, and the battery management system.

In a hybrid energy storage system according to an embodiment of the present invention, battery cells included in a plurality of battery racks of the energy control battery system include battery cells having high energy density, and a plurality of batteries The battery cells included in the rack may include battery cells with high power density.

In addition, in the hybrid energy storage system according to an embodiment of the present invention, the energy management system may control the operation of the second power conversion system when a high charge / Discharging is performed using the control battery system, and when operation below the predetermined charge / discharge rate is required, the operation of the first power conversion system is controlled to perform charge / discharge using the energy control battery system .

Further, in the hybrid energy storage system according to an embodiment of the present invention, the energy management system may control the operation of the first power conversion system when a high charge / The power less than the reference power is charged / discharged by using the energy control battery system, and the operation of the second power conversion system is controlled so that the power more than the first reference is charged / discharged by using the power control battery system , And if operation below the predetermined charge / discharge rate is required, the operation of the first power conversion system may be controlled to perform charge / discharge using the energy control battery system.

In addition, in the hybrid energy storage system according to an embodiment of the present invention, in order to maintain the energy control battery system and the power control battery system in an optimal state, Control is performed between the energy control battery system and the power control battery system by controlling the operation of the first power conversion system and the second power conversion system based on the state information of the control battery system and the power control battery system .

A method of controlling a hybrid energy storage system according to an embodiment of the present invention includes:

(A) determining, in an energy management system, whether an operation with a high charge / discharge rate higher than a predetermined charge / discharge rate is required;

(B) when it is determined in step (A) that a high charge / discharge rate operation is required at a predetermined charge / discharge rate, the power below the first reference charge / discharge cycle is performed using the energy control battery system, The power being charged / discharged using a power control battery system; And

(C) performing charging and discharging using the energy control battery system when it is determined in the step (A) that an operation of a predetermined charge-discharge rate or more is not required.

In a control method of a hybrid energy storage system according to an embodiment of the present invention, battery cells included in a plurality of battery racks of the energy control battery system include battery cells having high energy density, The battery cells included in the plurality of battery racks may include battery cells with high power density.

According to another aspect of the present invention, there is provided a method of controlling a hybrid energy storage system,

(D) After the step (B) or step (C), in the battery management system, the energy control battery system and the power control battery system Determining whether charge / discharge of the system is necessary;

(E) if it is determined in the step (D) that charging and discharging of the energy control battery system and the power control battery system are necessary, the battery management system, in the battery management system, Determining whether an optimal state can be maintained without the assistance of the controller;

(F) if it is determined in the step (E) that the optimum state maintenance is possible without the help of the AC system, the energy management system may determine the state information of the energy control battery system and the power control battery system from the battery management system Performing charging and discharging between the energy control battery system and the power control battery system by controlling operation of a power conversion system and a DC-DC converter included in the power control battery system; And

(G) if it is determined in step (E) that the optimal state maintenance is not possible without the assistance of the AC system, the energy management system is configured to determine status information of the energy control battery system and the power control battery system from the battery management system And performing charge and discharge of the energy control battery system and the power control battery system through the AC system by controlling the operation of the power conversion system and the DC-DC converter included in the power control battery system can do.

According to another aspect of the present invention, there is provided a method of controlling a hybrid energy storage system,

(D) After the step (B) or step (C), in the battery management system, the energy control battery system and the power control battery system Determining whether charge / discharge of the system is necessary;

(E) if it is determined in the step (D) that charging and discharging of the energy control battery system and the power control battery system are necessary, the battery management system, in the battery management system, Determining whether an optimal state can be maintained without the assistance of the controller;

(F) if it is determined in the step (E) that the optimum state maintenance is possible without the help of the AC system, the energy management system may determine the state information of the energy control battery system and the power control battery system from the battery management system Controlling the operation of the first power conversion system connected to the energy control battery system and the operation of the second power conversion system connected to the power control battery system to perform charge and discharge between the energy control battery system and the power control battery system ; And

(G) if it is determined in step (E) that the optimal state maintenance is not possible without the assistance of the AC system, the energy management system is configured to determine status information of the energy control battery system and the power control battery system from the battery management system Control system for controlling the operation of the first power conversion system connected to the energy control battery system and the operation of the second power conversion system connected to the power control battery system, And performing charging and discharging of the battery.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may appropriately define the concept of a term in order to best describe its invention The present invention should be construed in accordance with the spirit and scope of the present invention.

According to the embodiment of the present invention, it is possible to charge or discharge a high power, thereby widening the usable voltage range, extending the service life of the battery, facilitating maintenance of the system, It is possible to charge and discharge between battery systems without affecting the AC system, so that the battery can be kept in optimal operating condition.

1 is a block diagram of a hybrid energy storage system according to a first embodiment of the present invention;
2 is a block diagram of a hybrid energy storage system according to a second embodiment of the present invention;
3 is a graph for explaining the operation of the hybrid energy storage system according to the first embodiment of the present invention.
4 is a flowchart of a method of controlling a hybrid energy storage system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings.

Also, the terms "first", "second", "once", "other end", and the like are used to distinguish one component from another, and the fact that the component is limited by the terms no.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

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

1 is a block diagram of a hybrid energy storage system according to a first embodiment of the present invention.

A hybrid energy storage system according to a first embodiment of the present invention will now be described with reference to FIG.

The hybrid energy storage system according to the first embodiment of the present invention shown in FIG. 1 includes an energy control battery system 100 including a first rack ER1 to an nth rack ERn, a first rack PR1, A battery management system (BMS) 108 for managing the energy control battery system 100 and the power control battery system 102, and a battery management system Controls the charging and discharging of the energy control battery system 100 and the power control battery system 102 and converts the DC power of the energy control battery system 100 and the power control battery system 102 to AC power, A power conversion system (PCS) 104 that converts the AC power of the power conversion system 104 to DC power and an energy management system 106 that controls the operation of the power conversion system 104 and the battery management system 108. In the above, n and m include positive integers of 1 or more.

The operation of the hybrid energy storage system according to the first embodiment of the present invention will now be described.

The hybrid energy storage system according to the first embodiment of the present invention is a battery system including an energy control battery system 100 and a power control battery system 102. [

The battery cells included in the first rack ER1 to the nth rack ERn of the energy control battery system 100 include battery cells having high energy density, The battery cells included in the PR1 to the m-th rack PRm include battery cells having high power density.

In the hybrid energy storage system according to the first embodiment of the present invention, the power control battery system 102 includes DC (direct current) power supplies for converting the DC voltages of the first rack PR1 to the m- DC converter < RTI ID = 0.0 > 110 < / RTI >

The DC-DC converter 110 is designed to prevent battery systems having different voltages, capacities, or characteristics from adversely affecting each other when the battery system of different voltage, capacity, or characteristics is connected in parallel .

In the hybrid energy storage system according to the first embodiment of the present invention, when the energy management system 106 is required to operate at a high charging / discharging rate higher than a predetermined charge / discharge rate, the DC-DC converter 110 and the electric power The power control battery system 102 and the energy control battery system 100 are controlled by controlling the operation of the conversion system 104. When operation below the predetermined charge and discharge rate is required, And controls the operation of the conversion system 104 to perform charging and discharging using the energy control battery system 100.

3 is a graph for explaining the operation of the hybrid energy storage system according to the first embodiment of the present invention. In FIG. 3, reference symbol a denotes a charging / discharging operation of the energy control battery system 100, reference character b denotes a charging / discharging operation of the power control battery system 102, Charge / discharge operation.

As shown in FIG. 3, the hybrid energy storage system according to the first embodiment of the present invention performs charge / discharge by mainly using the energy control battery system 100 when operating at a low charge / discharge rate, When the battery is to be operated at a charge / discharge rate, the power control battery system 102 is used to perform charging / discharging with respect to a certain level of reference power, and charge / discharge is performed with a power less than a predetermined reference level using the energy control battery system 100 do.

More specifically, the energy management system 106 controls the operation of the power conversion system 104 when a high charging / discharging rate operation at a predetermined charge / discharge rate is required, DC converter 110 and the power conversion system 104 so that power over the first reference level is supplied to the power control battery system 102 Charge / discharge is performed. The energy management system 106 controls the operation of the power conversion system 104 to perform charging and discharging using the energy control battery system 100 when operation below the predetermined charge and discharge rate is required do.

In the first embodiment of the present invention, when operating at a high charge / discharge rate, the power control battery system 102 is used to take charge of a predetermined reference or more, and the energy control battery system 100 is used However, the present invention is not limited to this, and charge / discharge may be performed by mainly utilizing the power control battery system 102 when operating at a high charge / discharge rate.

Therefore, according to the hybrid energy storage system according to the first embodiment of the present invention, when a high power operation is required, it is possible to use a power control battery system 102 including battery cells having high power density, It is possible to charge or discharge a high power, so that a usable voltage range is wide, and the life of the battery can be prolonged.

In addition, since the hybrid energy storage system according to the first embodiment of the present invention includes two battery systems: an energy control battery system and a power control battery system, even when one battery system fails, System can be operated and maintenance of system is easy.

In addition, in order to keep the energy control battery system 100 and the power control battery system 102 in an optimal state, the energy management system 106 may control the energy control battery system 102 from the battery management system 108, By controlling the operation of the power conversion system 104 and the DC-DC converter 110 based on status information of the power control battery system 102 and the power control battery system 102, Charge / discharge between the control battery system 102 can be performed.

The energy management system 106 controls the operation of the power conversion system 104 to perform the charging and discharging operations between the energy control battery system 100 and the power control battery system 102, The energy control battery system 100 and the power control battery system 102 can be charged and discharged without affecting the AC system by performing charging and discharging between the energy control battery system 100 and the power control battery system 102, And charge / discharge between the battery system 102 can be performed.

Thus, the energy management system 106 can control the charging and discharging between the energy control battery system 100 and the power control battery system 102 without affecting the AC system to balance between the battery systems. Therefore, the battery can be kept in an optimal operating condition without affecting the AC system.

2 is a block diagram of a hybrid energy storage system according to a second embodiment of the present invention.

The hybrid energy storage system according to the second embodiment of the present invention shown in FIG. 2 includes an energy control battery system 200 including a first rack ER1 to an nth rack ERn, a first rack PR1, A battery management system (BMS) 210 for managing the energy control battery system 200 and the power control battery system 202, and a battery management system A first power conversion system 204 for controlling the charging and discharging of the energy control battery system 200, for converting the DC power of the energy control battery system 200 to AC power and the external AC power to DC power, A second power conversion system 206 for controlling the charging and discharging of the power control battery system 202, for converting the DC power of the power control battery system 202 to AC power and the external AC power to DC power, , And the first power conversion system (2 04), an energy management system (208) for controlling the operation of the second power conversion system (206) and the battery management system (210). In the above, n and m include positive integers of 1 or more.

The operation of the hybrid energy storage system according to the second embodiment of the present invention will now be described.

The hybrid energy storage system according to the second embodiment of the present invention includes an energy control battery system 200 and a power control battery system 202 as a battery system.

The battery cells included in the first rack ER1 to the nth rack ERn of the energy control battery system 200 include battery cells having high energy density, The battery cells included in the PR1 to the m-th rack PRm include battery cells having high power density.

In the hybrid energy storage system according to the second embodiment of the present invention, one power conversion system is installed in each of the battery systems to control charging and discharging of each battery system.

The first power conversion system 204 controls the charging and discharging of the energy control battery system 200 and the second power conversion system 206 not only controls the charging and discharging of the power control battery system 202, , The first power conversion system 204 and the second power conversion system 206 prevent adverse effects between the energy battery system 200 and the power control battery system 202.

The energy management system (208) controls the operation of the first power conversion system (204) when a high charge / discharge rate operation over a predetermined charge / discharge rate is required, so that power below the first reference power is supplied to the energy control battery system 200 and controls the operation of the second power conversion system 206 so that the power more than the first reference charge / discharge operation is performed using the power control battery system 202. Also, the energy management system 208 may control the operation of the first power conversion system 204 to perform the charge / discharge operation using the energy control battery system 200 when operation below the predetermined charge / .

In the second embodiment of the present invention, when the battery is operated at a high charge / discharge rate, the power control battery system 202 is used to perform charging and discharging for a power greater than a predetermined reference level, The present invention is not limited to this, but it is also possible to charge / discharge by mainly using only the power control battery system 202 when operating at a high charge / discharge rate have.

Therefore, according to the hybrid energy storage system according to the second embodiment of the present invention, when a high power operation is required, the power control battery system 202 including battery cells having high power density is used to mainly charge / It is possible to charge or discharge a high power, so that a usable voltage range is wide, and the life of the battery can be prolonged.

In order to keep the energy control battery system 200 and the power control battery system 202 in an optimal state, the energy management system 208 may control the energy control battery system 200 from the battery management system 210, (200) by controlling operation of the first power conversion system (204) and the second power conversion system (206) based on status information of the power control battery system (200) And the power control battery system 202 may be charged or discharged.

Although not shown in the figure, a power interrupter (not shown) may be further provided at the rear of the first power conversion system 204 and the second power conversion system 206, Control is performed to control the operation of the intermittent device (not shown) to shut off the power supply to the AC system and to perform charge and discharge operations between the energy control battery system 200 and the power control battery system 202 without affecting the AC system .

Thus, the energy management system 208 can control the charging and discharging between the energy control battery system 200 and the power control battery system 202 without affecting the AC system to balance between the battery systems. Therefore, the battery can be kept in an optimal operating condition without affecting the AC system.

4 is a flowchart illustrating a method of controlling a hybrid energy storage system according to an embodiment of the present invention.

The method for controlling the hybrid energy storage system according to an embodiment of the present invention shown in FIG. 4 includes a step S400 of determining in the energy management system 106 whether a high charge / If it is determined in step S400 that a high charge / discharge rate operation is required, the power below the first reference charge / discharge is performed using the energy control battery system 100, (S402) of performing charging / discharging using the energy control battery system (102), performing charging / discharging using the energy control battery system (100) when it is determined that the high charge / S404), after step S402 or step S404, in the battery management system 108, the energy control battery system 100 and the power control battery 100 (S406) to determine whether the energy control battery system 100 and the power control battery system 102 need to be charged or discharged in order to maintain the stem 102 in an optimal state. In step S406, The battery management system 108 can determine whether or not the AC system 100 needs to charge and discharge the power control battery system 102 based on the AC system information from the energy management system 106 (S408). If it is determined in step S408 that the optimum state can be maintained without the help of the AC system, the energy management system 106 determines whether the energy management system 106 can maintain the optimal state Based on the state information of the energy control battery system 100 and the power control battery system 102, the power conversion system 104 and the power Performing (S410) charging / discharging between the energy control battery system 100 and the power control battery system 102 by controlling the operation of the DC-DC converter 110 included in the control battery system 102, and If it is determined in step S408 that the optimum state can not be maintained without the assistance of the AC system, the energy management system 106 may control the energy control battery system 100 and the power control battery system 100 from the battery management system 108, DC converter 110 included in the power conversion system 104 and the power control battery system 102 based on status information of the system 102, (S412) charging and discharging of the power control battery system (102) and the battery (100).

The operation of the hybrid energy storage system control method according to an embodiment of the present invention will now be described.

In step S400, the energy management system 106 determines whether an operation with a high charge / discharge rate higher than a predetermined charge / discharge rate is required.

In step S402, when it is determined in step S400 that a high charge / discharge rate operation is required, the power below the first reference charge / discharge is performed using the energy control battery system 100, And performs charge and discharge using the control battery system 102. [

In step S404, if it is determined in step S400 that a high charge / discharge rate operation is not required, charge / discharge is performed using the energy control battery system 100. [

In step S406, after step S402 or step S404, the battery management system 108 controls the energy control battery system 100 and the power control battery system 102 to maintain the optimal state, It is determined whether charging and discharging of the system 100 and the power control battery system 102 is necessary.

If it is determined in step S406 that the charging and discharging of the energy control battery system 100 and the power control battery system 102 is necessary, in step S408, the energy management system 106, in the battery management system 108, Based on the AC system information from the AC system.

If it is determined in step S408 that the optimum state can be maintained without the assistance of the AC system, the energy management system 106 determines in step S410 whether the energy management system 106 has received the energy control battery system 100 from the battery management system 108, By controlling the operation of the power conversion system 104 and the DC-DC converter 110 included in the power control battery system 102 based on the state information of the power control battery system 102, ) And the power control battery system (102).

If it is determined in step S408 that the optimal state can not be maintained without the help of the AC system, the energy management system 106 is controlled by the energy control battery system 100 from the battery management system 108 By controlling the operation of the DC-DC converter 110 included in the power conversion system 104 and the power control battery system 102 based on status information of the power control battery system 102, And performs charging and discharging of the energy control battery system 100 and the power control battery system 102.

4, step S406, step S408, step S410, and step S412 are performed by the energy control battery system 100 to maintain the energy control battery system 100 and the power control battery system 102 in an optimal state, And balancing between the energy control battery system 100 and the power control battery system 102 by performing charging and discharging between the power control battery system 102 and the power control battery system 102.

The above description relates to a control method of a hybrid energy storage system based on a hybrid energy storage system according to the first embodiment of the present invention shown in FIG.

The control method of the hybrid energy storage system based on the hybrid energy storage system according to the second embodiment of the present invention shown in FIG. 2 is the same as the description of steps S400 to S408. However, only steps S410 and S412 are slightly different from the above description.

In this case, if it is determined in step S408 that the optimum state maintenance is possible without the help of the AC system, the energy management system 208 may determine whether the energy control battery system 200 ) Coupled to the power control battery system (202) and a first power conversion system (204) connected to the energy control battery system (200) based on status information of the power control battery system And performs charge / discharge operations between the energy control battery system 200 and the power control battery system 202 by controlling the operation of the conversion system 206.

Although not shown in the drawings, a power interrupter (not shown) may further be provided at the rear of the first power conversion system 204 and the second power conversion system 206, and in step S410, (Not shown) to shut off the power supply to the AC system and then to disconnect the power supply from the energy control battery system 200 and the power control battery system 202 without affecting the AC system Charge and discharge can be performed.

If it is determined in step S408 that the optimal state can not be maintained without the assistance of the AC system, the energy management system 208 may be controlled by the energy control battery system 200 The operation of the first power conversion system 204 coupled to the energy control battery system 200 based on status information of the power control battery system 202 and the operation of the second power conversion system 204 connected to the power control battery system 202. [ And controls the operation of the energy control battery system 200 and the power control battery system 202 through the AC system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be modified or improved.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100: Energy control battery system
102: Power control battery system
104: Power conversion system
106: Energy management system
108: Battery management system
110: DC-DC converter
ER1, ..., ERn: first rack to nth rack
PR1, ..., PRm: the first rack to the m-th rack

Claims (15)

An energy control battery system including a plurality of battery racks;
A power control battery system including a plurality of battery racks;
A battery management system for managing the energy control battery system and the power control battery system;
Controlling the charging and discharging of the energy control battery system and the power control battery system to convert the DC power of the energy control battery system and the power control battery system to AC power and the external AC power to DC power, system; And
And an energy management system that controls operation of the power conversion system and the battery management system. The method according to claim 1,
Wherein the battery cells included in the plurality of battery racks of the energy control battery system include battery cells having high energy density,
Wherein the battery cells included in the plurality of battery racks of the power control battery system include battery cells of high power density. The method of claim 2,
Wherein the power control battery system further comprises a DC-DC converter for converting the DC voltage of the plurality of racks to a predetermined DC voltage. The method of claim 3,
The energy management system controls the operation of the DC-DC converter and the power conversion system to perform charge / discharge using the power control battery system when a high charge / Wherein the operation of the power conversion system is controlled to perform charging and discharging using the energy control battery system when an operation less than a predetermined charge and discharge rate is required. The method of claim 3,
The energy management system controls the operation of the power conversion system when a high charge / discharge rate operation is required, which is higher than a predetermined charge / discharge rate, so that the power below the first reference charge / Wherein the controller controls the operation of the DC-DC converter and the power conversion system to perform charge / discharge using the power control battery system, and when the operation is less than the predetermined charge / discharge rate, And controlling the operation of the conversion system to perform charging and discharging using the energy control battery system. The method of claim 3,
Wherein the energy management system is operable to maintain the energy control battery system and the power control battery system in an optimal state based on state information of the energy control battery system and the power control battery system from the battery management system, A hybrid energy storage system that performs charge / discharge between the energy control battery system and the power control battery system by controlling the operation of the conversion system and the DC-DC converter. An energy control battery system including a plurality of battery racks;
A power control battery system including a plurality of battery racks;
A battery management system for managing the energy control battery system and the power control battery system;
A first power conversion system for controlling charging and discharging of the energy control battery system, converting a DC power of the energy control battery system to AC power and an external AC power to DC power;
A second power conversion system for controlling charging and discharging of the power control battery system, converting a DC power of the power control battery system to AC power and an external AC power to DC power; And
And an energy management system for controlling operations of the first power conversion system, the second power conversion system, and the battery management system. The method of claim 7,
Wherein the battery cells included in the plurality of battery racks of the energy control battery system include battery cells having high energy density,
Wherein the battery cells included in the plurality of battery racks of the power control battery system include battery cells of high power density. The method of claim 8,
The energy management system controls the operation of the second power conversion system to perform charge / discharge using the power control battery system when a high charge / discharge rate operation with a predetermined charge / discharge rate is required, Wherein the controller controls the operation of the first power conversion system to perform charging and discharging using the energy control battery system. The method of claim 8,
The energy management system controls the operation of the first power conversion system when a high charge / discharge rate operation is required at a predetermined charge / discharge rate, so that the power below the first reference charge / Wherein the power control unit controls the operation of the second power conversion system so that the power more than the first reference is charged / discharged by using the power control battery system, and when operation below the predetermined charge / And controlling the operation of the conversion system to perform charging and discharging using the energy control battery system. The method of claim 8,
Wherein the energy management system is further configured to control the energy control battery system and the power control battery system based on state information of the energy control battery system and the power control battery system from the battery management system, 1 power conversion system and the second power conversion system to perform charge / discharge between the energy control battery system and the power control battery system. (A) determining, in an energy management system, whether an operation with a high charge / discharge rate higher than a predetermined charge / discharge rate is required;
(B) when it is determined in step (A) that a high charge / discharge rate operation is required at a predetermined charge / discharge rate, the power below the first reference charge / discharge cycle is performed using the energy control battery system, The power being charged / discharged using a power control battery system; And
(C) performing charging and discharging using the energy control battery system when it is determined in the step (A) that an operation of a predetermined charge-discharge rate or more is not required. The method of claim 12,
Wherein the battery cells included in the plurality of battery racks of the energy control battery system include battery cells having high energy density,
Wherein the battery cells included in the plurality of battery racks of the power control battery system include battery cells of high power density. 14. The method of claim 13,
(D) After the step (B) or step (C), in the battery management system, the energy control battery system and the power control battery system Determining whether charge / discharge of the system is necessary;
(E) if it is determined in the step (D) that charging and discharging of the energy control battery system and the power control battery system are necessary, the battery management system, in the battery management system, Determining whether an optimal state can be maintained without the assistance of the controller;
(F) if it is determined in the step (E) that the optimum state maintenance is possible without the help of the AC system, the energy management system may determine the state information of the energy control battery system and the power control battery system from the battery management system Performing charging and discharging between the energy control battery system and the power control battery system by controlling operation of a power conversion system and a DC-DC converter included in the power control battery system; And
(G) if it is determined in step (E) that the optimal state maintenance is not possible without the assistance of the AC system, the energy management system is configured to determine status information of the energy control battery system and the power control battery system from the battery management system And performing charge and discharge of the energy control battery system and the power control battery system through the AC system by controlling the operation of the power conversion system and the DC-DC converter included in the power control battery system Of the hybrid energy storage system. 14. The method of claim 13,
(D) After the step (B) or step (C), in the battery management system, the energy control battery system and the power control battery system Determining whether charge / discharge of the system is necessary;
(E) if it is determined in the step (D) that charging and discharging of the energy control battery system and the power control battery system are necessary, the battery management system, in the battery management system, Determining whether an optimal state can be maintained without the assistance of the controller;
(F) if it is determined in the step (E) that the optimum state maintenance is possible without the help of the AC system, the energy management system may determine the state information of the energy control battery system and the power control battery system from the battery management system Controlling the operation of the first power conversion system connected to the energy control battery system and the operation of the second power conversion system connected to the power control battery system to perform charge and discharge between the energy control battery system and the power control battery system ; And
(G) if it is determined in step (E) that the optimal state maintenance is not possible without the assistance of the AC system, the energy management system is configured to determine status information of the energy control battery system and the power control battery system from the battery management system Control system for controlling the operation of the first power conversion system connected to the energy control battery system and the operation of the second power conversion system connected to the power control battery system, And performing charging and discharging of the hybrid energy storage system.

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