KR20220014766A - Battery management system and control method thereof for protecting battery system - Google Patents

Abstract

According to an embodiment of the present invention, a battery management system comprises: a power supply unit that supplies power to the battery management system; a sensor unit that detects a state of a battery rack; a communication unit for performing communication for each of devices of a battery system including the battery rack and various devices for controlling power of the battery rack; a control unit for monitoring the state of the battery rack; an abnormality detection unit that detects whether the battery rack is abnormal and transmits a power cut-off signal when it is detected that an abnormality has occurred in the battery rack; and a power control unit that cuts off driving power of the communication unit based on the power cut-off signal.

Description

BATTERY MANAGEMENT SYSTEM AND CONTROL METHOD THEREOF FOR PROTECTING BATTERY SYSTEM

The present invention relates to a battery management system for protecting a battery system by autonomously generating a loss of communication (LOC), which is one of the functions of the battery system, and a control method therefor.

Recently, research and development on secondary batteries has been actively carried out. Here, the secondary battery is a battery capable of charging and discharging, and includes all of the conventional Ni/Cd batteries, Ni/MH batteries, and the latest lithium ion batteries. Among secondary batteries, lithium ion batteries have an advantage in that their energy density is much higher than that of conventional Ni/Cd batteries and Ni/MH batteries. In addition, lithium ion batteries can be manufactured in a small size and light weight, so they are used as power sources for mobile devices. . In addition, the lithium ion battery is receiving attention as a next-generation energy storage medium as the range of use has been expanded as a power source for electric vehicles.

In addition, the secondary battery is generally used as a battery pack including a battery module in which a plurality of battery cells are connected in series and/or in parallel. In addition, the state and operation of the battery pack are managed and controlled by the battery management system.

In particular, in the battery system of the ESS (Energy Storage System), when a hazard condition (eg, overcharge, overdischarge, etc.) of the secondary battery occurs, the software diagnostic function of the Battery Management System (BMS) is implemented. After judging the state by using the .

However, when disconnection from the DC-Link of the battery system fails due to burnout or malfunction of protective devices such as relays and circuit breakers, or when an error in the diagnostic operation to determine the abnormal state of the secondary battery occurs, the deterioration of the abnormal state of the secondary battery Accordingly, the ESS battery system may be damaged or even lead to a fire.

In this case, the battery management system of the ESS can transmit and receive information on emergency situations through communication with the power conversion device or the upper system, the Energy Management System (EMS), but the communication speed, communication calibration failure, and communication The ESS battery system may not be removed from DC-Link in time due to limitations such as protocol inconsistency, cooperative control by power conversion devices or energy management systems.

The present invention is devised to solve the above problem, and by using the principle that all systems are shut down in the LOC situation, by generating the LOC state autonomously, an error occurs in the diagnostic operation of the battery management system. An object of the present invention is to provide a battery management system for protecting a battery system and related systems (PCS, EMS, etc.) and a control method therefor.

The battery management system according to an embodiment of the present invention includes a power supply unit for supplying power to the battery management system, a sensor unit for detecting the state of the battery rack, and various devices for controlling the power of the battery rack and the battery rack A communication unit that communicates with each of the devices of the battery system, a control unit that monitors the state of the battery rack, detects whether the battery rack is abnormal, and cuts off power when it is detected that an abnormality has occurred in the battery rack It may include an abnormality detection unit for transmitting a signal and a power control unit for cutting off the driving power of the communication unit based on the power cut-off signal.

A battery system according to an embodiment of the present invention includes a battery rack including a plurality of battery modules, a blocking device for blocking current when an abnormality occurs to protect the battery system, a battery management system for performing state monitoring for the battery rack, A power conversion device for converting power transmitted and received with the battery rack and an energy management system for controlling the battery management system and the power conversion device to manage the entire power of the battery system, the battery management system, battery management A power supply unit for supplying power to the system, a sensor unit for detecting the state of the battery rack, a communication unit for performing communication for each of the devices of the battery system including various devices for controlling the power of the battery rack and the battery rack, A control unit that monitors the state of the battery rack, detects whether the battery rack is abnormal, and an abnormality detection unit that transmits a power cut-off signal when it is detected that an abnormality has occurred in the battery rack, and based on the power cut-off signal It may include a power control unit that cuts off the driving power of the communication unit.

The control method of the battery management system according to an embodiment of the present invention includes the steps of detecting whether the battery rack is abnormal, when it is detected that the battery rack has an abnormality, transmitting a power cutoff signal to the power control unit of the battery management system and cutting off driving power of a communication unit of the battery management system based on the power cut-off signal.

According to the battery protection apparatus and method of the present invention, by generating the LOC state autonomously using the principle that all systems are shut down in the LOC situation, even when an error occurs in the diagnostic operation of the battery management system, the battery system and the associated system (PCS, EMS, etc.) can be protected.

1 is a view showing the configuration of a general battery rack.
2 is a block diagram illustrating a configuration of a battery management system according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating the disconnection of DC-Link by detecting an abnormal state in the conventional ESS battery system.
FIG. 4 is a diagram showing that DC-Link is dropped by detecting an abnormal state in the ESS battery system according to an embodiment of the present invention.
FIG. 5 is a view showing that DC-Link is dropped by detecting an abnormal state in the ESS battery system according to another exemplary embodiment of the present invention.
6 is a flowchart illustrating a battery protection method according to an embodiment of the present invention.
7 is a diagram illustrating a hardware configuration of a battery management system according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this document, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

For various embodiments of the present invention disclosed in this document, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and various embodiments of the present invention may be implemented in various forms. and should not be construed as being limited to the embodiments described in this document.

Expressions such as "first", "second", "first", or "second" used in various embodiments may modify various components regardless of order and/or importance, do not limit For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

Terms used in this document are only used to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise.

All terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art of the present invention. Terms defined in general used in the dictionary may be interpreted as having the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in this document, are not interpreted in an ideal or excessively formal meaning . In some cases, even terms defined in this document cannot be construed to exclude embodiments of the present invention.

1 is a view showing the configuration of a general battery rack.

Referring to Figure 1, it schematically shows a battery control system including a battery rack (1) and the upper controller (2) included in the upper system according to an embodiment of the present invention.

As shown in Figure 1, the battery rack (1) is made of one or more battery cells, and a plurality of battery modules 10 capable of charging and discharging, the (+) terminal side of the plurality of battery modules 10 or (- ) connected in series to the terminal side to monitor the voltage, current, temperature, etc. of the switching unit 14 for controlling the charge/discharge current flow of the plurality of battery modules 10, and the battery rack 1, overcharge and overdischarge It includes a battery management system 20 that controls and manages to prevent light.

Here, the switching unit 14 is a semiconductor switching device for controlling the current flow for charging or discharging of the plurality of battery modules 10, for example, according to the specification of the battery rack (1) at least one MOSFET or Relays, magnetic contactors, etc. may be used.

In addition, the BMS (20), in order to monitor the voltage, current, temperature, etc. of the battery rack (1), the gate, source and drain of the semiconductor switching element, such as voltage and current can be measured or calculated. In addition, the BMS 20 can measure the current, voltage, temperature, etc. of the battery rack 1 using the sensor 12 provided adjacent to the semiconductor switching element. The BMS 20 is an interface for receiving the measured values of the various parameters described above, and may include a plurality of terminals and a circuit connected to these terminals to process the received values.

In addition, the BMS 20, the switching unit 14, for example, may control ON/OFF of the MOSFET, is connected to the plurality of battery modules 10 to monitor the state of each of the plurality of battery modules (10) can

The host controller 2 may transmit control signals for the plurality of battery modules 10 to the BMS 20 . Accordingly, the operation of the BMS 20 may be controlled based on a signal applied from the upper controller. The battery cell of the present invention may be a configuration included in a battery rack used in an ESS (Energy Storage System). And in this case, the host controller 2 may be an ESS controller or a vehicle controller. However, the battery rack (1) is not limited to this use.

Since the configuration of the battery rack 1 and the configuration of the BMS 20 are known configurations, a more detailed description will be omitted.

2 is a block diagram illustrating a configuration of a battery management system according to an embodiment of the present invention.

Referring to FIG. 2 , the battery management system 200 according to an embodiment of the present invention includes a power supply unit 210 , a sensor unit 220 , a communication unit 230 , a control unit 240 , an abnormality detection unit 250 , and a power control unit. (260).

The power supply unit 210 may supply power to each component of the battery management system 200 . For example, the power supply unit 210 may supply power to each of the sensor unit 220 , the communication unit 230 , the control unit 240 , the abnormality detection unit 250 , and the power control unit 260 of the battery management system 200 . have. In addition, the power supply unit 210 may receive power from a battery rack including a plurality of battery modules or an external power source.

The sensor unit 220 may detect the state of the battery rack. That is, the sensor unit 220 collects data related to various states of the battery rack through at least one measurement circuit, for example, voltage, current, temperature, pressure, etc. of the battery module and transmits it to the control unit 240 . By doing so, it is possible to perform a diagnostic operation of a typical battery rack.

The communication unit 230 may communicate with each device included in the battery system. Specifically, the communication unit 230 may transmit/receive various data or commands to a battery rack, a power conversion device (PCS), an energy management system (EMS), and the like included in the battery system. For example, the communication unit 230 may be a transceiver of the battery management system 200 .

The control unit 240 may perform monitoring of the state of the battery rack. Specifically, the control unit 240 may perform various functions such as lifetime management of the battery rack, capacity control of the battery rack, and battery balancing. In addition, the control unit 240 may receive information about the state of the battery rack from the sensor unit 220 may perform a battery diagnosis operation. For example, the controller 240 may be an MCU of the battery management system 200 .

Abnormality detection unit 250 may detect whether the battery rack is abnormal. For example, the abnormality detection unit 250 may detect whether the battery is abnormal (eg, overcharge, overdischarge, etc.) as a secondary protection function for a case where a diagnosis operation by the battery management system is not properly performed. have. At this time, the abnormality detection unit 250 may detect the abnormal state by monitoring the state of the voltage, current, temperature, pressure, etc. of the battery, including a circuit for measuring voltage, current, temperature, pressure, and the like.

The abnormality detection unit 250 may generate a power cutoff signal when it is detected that an abnormality has occurred in the battery system. In this case, the power cut-off signal may be a signal for cutting off power for driving a communication module (eg, the communication unit 230 of the battery management system 200 ) inside the battery system. The abnormality detection unit 250 may transmit the generated power cut-off signal to the power control unit 260 .

In addition, based on the state information received from the sensor unit 220 in the control unit 240, the reference range (first reference range) for detecting the abnormal state of the battery rack and the abnormality of the battery rack in the abnormal detection unit 250 The reference range for detection (the second reference range) may be set differently.

In this case, the reference range of the abnormality detection unit 250 is narrower than the reference range of the control unit so that the abnormality of the battery rack can be detected when the diagnosis operation of the battery rack is not normally performed by the reference range of the control unit 240 . can be set. For example, if the reference voltage range for overvoltage detection of the control unit 240 is 4.3V, the reference voltage range of the abnormal detection unit 250 is set to 4.6V higher than that, by the control unit 240 overvoltage of the battery rack When the voltage is continuously increased because the detection is not performed normally, the abnormality detection unit 250 may determine whether the overvoltage is present. As such, the abnormality detection unit 250 detects an abnormality in a case where the software diagnostic operation by the control unit 240 of the battery management system 200 is not performed, thereby causing the power control unit 260 to drive the communication unit 230 . You can turn the power off.

Meanwhile, when it is detected that an abnormality has occurred in the battery system, the abnormality detection unit 250 may generate a signal for allowing each device of the battery system to recognize that a current loss of communication (LOC) state has occurred. The LOC protection function is a function commonly included in a battery management system, a power conversion device, and an energy management system inside the battery system, and all systems may be shut down when a situation occurs.

As such, in the battery management system 200 according to an embodiment of the present invention, when a diagnosis operation by the battery management system is not normally performed, it is determined that each system in the battery system is in the LOC state by generating the LOC state by itself. can make it

The abnormality detection unit 250 may transmit information about the generated LOC state to the control unit 240 , a power conversion system (PCS) of a battery system, an energy management system (EMS), and the like. Accordingly, each system of the battery system may digitally determine that the LOC has occurred.

In addition, when the control unit 240 , the power conversion device, or the energy management system receives a signal related to the LOC state, the blocking device inside the battery system may be operated. For example, the breaking device in the battery system may include a battery protection unit (BPU), a distribution board, a relay and a circuit breaker (CB), etc. on the side of the power converter. At this time, the battery protection unit and the distribution board may be controlled by the control unit 240 (eg, MCU) of the battery management system, and the power conversion device-side relay and circuit breaker may be directly controlled by the power conversion device. .

The power control unit 260 may cut off the driving power of the communication unit 230 of the battery system based on the power cutoff signal received from the abnormality detection unit 250 . In addition, the power control unit 260, in addition to the communication unit 230 of the battery management system 200, to generate the LOC state by cutting off the power of the communication module of other linked systems of the battery system, such as a power conversion device or an energy management system. can As such, the power control unit 260 may automatically generate the LOC by controlling the power of the communication module of each system inside the battery system to artificially cut off the power.

Meanwhile, in FIG. 2 , the battery management system 200 according to an embodiment of the present invention has been described as including the abnormality detection unit 250 and the power control unit 260 , but the present invention is not limited thereto, and the abnormality detection unit 250 and the power control unit 260 may be included separately from each system of the battery system, or may be provided in a linkage system such as a power conversion device and an energy management system.

As described above, according to the battery management system according to an embodiment of the present invention, when an error occurs in the diagnosis operation of the battery management system by autonomously generating the LOC state using the principle that all systems are shut down in the LOC situation It can also protect the battery system and related systems (PCS, EMS, etc.).

FIG. 3 is a diagram showing that DC-Link is removed by detecting an abnormal state in the conventional ESS battery system.

Referring to FIG. 3 , in the conventional ESS battery management system, it is possible to determine an abnormal state (eg, overcharge, overdischarge, etc.) of the battery rack in the battery management system. In this case, the battery management system may detect state information such as voltage, current, and temperature of the battery through the measurement circuit and determine whether there is an abnormality according to a set diagnosis operation.

If the battery management system determines that an abnormality has occurred inside the battery rack, the battery rack is removed from DC-Link by controlling the relay (eg, battery protection unit, distribution board, etc.) and circuit breaker included in the battery rack. can do it In addition, as shown in FIG. 3 , the conventional battery management system may communicate with a power conversion device or an energy management system, and may transmit/receive various state data or commands of the battery.

As described above, in the conventional battery system, the battery management system collectively controls the battery state diagnosis and cut-off device, and when an error occurs in the diagnosis operation of the battery management system, accurate diagnosis of the abnormal state becomes impossible. may cause damage to

FIG. 4 is a diagram showing that DC-Link is dropped by detecting an abnormal state in the ESS battery system according to an embodiment of the present invention.

Referring to FIG. 4 , the ESS battery system according to an embodiment of the present invention includes a battery protection unit 402 , a distribution board 404 , a relay/circuit breaker 406 , a battery management system 410 , and a power conversion device 420 . ) may be included. In addition, the battery management system 410 may include a detector 412 , a measurement circuit 414 , an MCU 416 , and a communication module 418 .

The battery protection unit 402, the distribution board 404 and the relay/circuit breaker 406 include a switch, and the battery module can be disconnected from the DC-Link through on/off control of the switch to protect the battery system. have.

The detector 412 may detect the state of the battery. For example, the detector 412 may detect a voltage, current, temperature, etc. of the battery and determine that an abnormality has occurred when these data are out of a reference range. In this case, the detector 412 may function as a secondary measurement circuit with respect to the existing measurement circuit 414 of the battery management system. In FIG. 4 , the detector 412 may correspond to the abnormality detection unit 250 of FIG. 2 .

Meanwhile, as described above, a reference range for detecting whether the detector 412 is abnormal may be set to be different from a reference range for determining whether or not there is an abnormality in the MCU 416 . For example, when the voltage reference value for detecting the overvoltage in the MCU 416 is 4.3V, the voltage reference value of the detector 412 may be set to 4.6V. As such, the detector 412 may be configured to detect whether the battery is abnormal in hardware.

The measurement circuit 414 may monitor the state of the battery. That is, the measurement circuit 414 may collect data on various states of the battery and transmit it to the MCU 416 to perform a normal battery diagnosis operation. For example, the measurement circuit 414 is a battery monitoring IC (BMIC), and may be the sensor unit 220 of FIG. 2 .

The MCU 416 may perform an overall control operation of the battery management system 410 . For example, the MCU 416 may perform various functions such as battery life management, battery capacity control, and battery balancing. Also, the MCU 416 may communicate with the measurement circuit 414 to receive data regarding the battery state from the measurement circuit 414 to perform a battery diagnosis operation. In this case, the MCU 416 may be the controller 240 of FIG. 2 .

The communication module 418 may perform communication such as transmitting various data of the battery management system 410 to a peripheral system such as the power conversion device 420 or an energy management system (not shown), or receiving commands from them. . For example, the communication module 418 may be a communication transceiver, and may correspond to the communication unit 230 of FIG. 2 .

The power conversion device 420 may convert the form of power used in the battery system according to its purpose. For example, the power conversion device 420 may convert power into direct current when storing power in a battery, and convert power into alternating current when discharging power to the outside.

As shown in FIG. 4 , in the ESS battery system according to an embodiment of the present invention, the measurement circuit 414 of the battery management system 410 does not normally detect the state information or an error occurs in the diagnostic program of the MCU 416 . When an error occurs in the software-based diagnostic operation of the battery management system 410 , the detector 412 may secondarily detect an abnormality.

In addition, when a battery abnormality is detected, a power cut-off signal may be generated to cut off the driving power of the communication module 418 of the battery management system 410 . In addition, the battery system itself generates a signal regarding the LOC state, and the information about the LOC state is transmitted to the MCU 416 of the battery management system 410, the power conversion device 420, and the energy management system (not shown). You can make the system digitally aware that it is in a LOC state. In this case, the power cut-off signal and LOC state information may be generated by the detector 412 .

Next, when it is recognized that the system as a whole is in the LOC state, the power control unit (not shown) of the battery management system 410 or the blocking function of the power conversion device 420 (eg, relays or circuit breakers 402, 404, 406) control) to disengage the battery rack from DC-Link.

FIG. 5 is a diagram showing that DC-Link is dropped by detecting an abnormal state in the ESS battery system according to another exemplary embodiment of the present invention.

Referring to FIG. 5 , in the ESS battery system according to another exemplary embodiment of the present invention, the communication (CAN, RS-485, etc.) circuit of the battery management system is non-isolated. As shown in FIG. 5 , when the communication circuit of the battery management system is non-isolated, the ground of the battery management system 510 and the power conversion device 520 match, for example, corresponding to the battery management system of a vehicle. can do. In this case, similarly to FIG. 4 , the relay and circuit breakers 502 , 504 , and 506 may be opened in the power conversion device 520 by cutting off the driving power of the communication module 518 and generating an artificial LOC state.

In the case of FIG. 5 , the components and the actual operation method of FIG. 4 are the same as those of FIG. 4 except that an isolated power source is not provided in the communication module 518 , and thus a detailed description thereof will be omitted.

6 is a flowchart illustrating a battery protection method according to an embodiment of the present invention.

Referring to FIG. 6 , first, the abnormality of the battery rack is detected through the abnormality detection unit (S610). At this time, in step S610, it is possible to detect whether the battery rack is abnormal as a secondary protection function in case the diagnosis operation by the battery management system is not properly performed. In this case, the abnormal state can be detected by monitoring the state of the voltage, current, temperature, pressure, etc. of the battery including a circuit for measuring voltage, current, temperature, pressure, and the like.

Then, it is determined whether an abnormality of the battery rack is detected (S620). If no abnormality is detected in the battery rack (NO), it returns to step S610 again and continues to monitor the battery state.

If it is determined that an abnormality has occurred in the battery rack through the abnormality detection unit (YES), a power cutoff signal for the communication module is generated and transmitted to the power control unit (S630). In this case, the power cut-off signal may be a signal for shutting off the power for driving the communication module inside the battery system.

Upon receiving the power cut-off signal generated in step S630, the power control unit cuts off the driving power of the communication module (S640). For example, when the communication module operates in an isolated manner, the isolated power to the communication module may also be cut off. As such, by controlling the power of the communication module of each system inside the battery system to artificially cut off the power, the LOC can be generated autonomously.

Next, in step S630, a signal related to the LOC state may be generated together. Here, the signal regarding the LOC state may be a signal that allows the respective linked systems of the battery system to recognize that the current LOC has occurred. That is, in the control method of the battery management system according to an embodiment of the present invention, when a diagnosis operation by the battery management system is not normally performed, the LOC state is generated by itself, so that various systems (eg, BMS, PCS, EMS, etc.) can be determined to be in the LOC state.

Then, when it is recognized that the LOC has occurred in each of the battery systems, the blocking device inside the battery system is operated ( S660 ). For example, the blocking device inside the battery system may include a battery protection unit (BPU), a distribution board, a relay and a circuit breaker (CB) of the power conversion device, and the like. In this case, the battery protection unit and the distribution board may be controlled by the MICOM of the battery management system, and the relay and the circuit breaker on the power conversion device side may be directly controlled by the power conversion device.

Meanwhile, the control method of the battery system according to the present invention is not limited to the order of FIG. 6 , and the order of each step may be changed.

As described above, according to the battery management system according to an embodiment of the present invention, when an error occurs in the diagnosis operation of the battery management system by autonomously generating the LOC state using the principle that all systems are shut down in the LOC situation It can also protect the battery system and related systems (PCS, EMS, etc.).

7 is a diagram illustrating a hardware configuration of a battery management system according to an embodiment of the present invention.

Referring to FIG. 7 , the battery management system 700 according to an embodiment of the present invention may include an MCU 710 , a memory 720 , an input/output I/F 730 , and a communication I/F 740 . have.

The MCU 710 executes various programs (eg, a battery diagnosis program, a LOC generation signal generation program, a communication module power off program, etc.) stored in the memory 720 , and detects battery abnormalities and LOC through these programs. It may be a processor that processes various data for self-generation of a state, power control of a communication module, and the like, and performs the functions of FIG. 2 described above.

The memory 720 may store various programs related to battery abnormality diagnosis, LOC self-generation, power control, and the like. Also, the memory 720 may store various data for battery protection, such as battery state data.

A plurality of such memories 720 may be provided as needed. The memory 720 may be a volatile memory or a non-volatile memory. As the memory 720 as a volatile memory, RAM, DRAM, SRAM, or the like may be used. As the memory 720 as a non-volatile memory, ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. may be used. Examples of the above-listed memories 720 are merely examples and are not limited to these examples.

The input/output I/F 730 is an interface for transmitting and receiving data by connecting an input device (not shown) such as a keyboard, mouse, and touch panel and an output device such as a display (not shown) and the MCU 710 . can provide

The communication I/F 740 is a configuration capable of transmitting and receiving various data to and from the server, and may be various devices capable of supporting wired or wireless communication. For example, it is possible to transmit and receive a program or various data for detecting a battery abnormality and generating a LOC state from an external server provided separately through the communication I/F 740 .

In this way, the computer program according to an embodiment of the present invention is recorded in the memory 720 and processed by the MCU 710, so that, for example, it may be implemented as a module that performs each functional block illustrated in FIG. 2 . have.

In the above, even though it has been described that all components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more.

In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: Battery rack 2: Host controller
10: multiple battery modules 12: sensors
14: switching unit 20: BMS
200: battery management system 210: power unit
220: sensor unit 230: communication unit
240: control unit 250: abnormality detection unit
260: power control unit 402, 502: battery protection unit (BPU)
404, 504: distribution board 406, 506: relay/circuit breaker
410, 510: Battery Management System (BMS) 412, 512: Detector
414, 514: BMIC (ASIC) 416, 516: MCU
418, 518: communication transceivers 420, 520: power conversion unit (PCS)
700: battery management system 710: MCU
720: memory 730: input/output I/F
740: communication I/F

Claims (14)

a power supply unit for supplying power to the battery management system;
a sensor unit for detecting a state of a battery rack that is a management target of the battery management system;
a communication unit for performing communication for each of the devices of the battery system including various devices for controlling the power of the battery rack and the battery rack;
a control unit for monitoring the state of the battery rack;
an abnormality detection unit for detecting whether the battery rack is abnormal, and transmitting a power cut-off signal when it is detected that an abnormality has occurred in the battery rack; and
and a power control unit configured to cut off driving power of the communication unit based on the power cut-off signal. The method according to claim 1,
When the driving power of the communication unit is cut off, the control unit operates a blocking device inside the battery system. 3. The method according to claim 2,
The blocking device inside the battery system includes a battery protection unit (BPU) or a distribution board connected to the outside of the battery rack. The method according to claim 1,
The control unit is a battery management system that causes the power conversion device to operate a blocking device inside the battery system. 5. The method according to claim 4,
The battery management system including a circuit breaker (CB) or a relay or circuit breaker on the side of the power conversion device. The method according to claim 1,
The battery management system for transmitting the information about the state of the abnormality detection unit LOC (Loss of Communication) state when the abnormal detection of the battery rack to the control unit. The method according to claim 1,
The abnormality detection unit transmits information about the LOC state when an abnormality of the battery rack is detected to at least one of a power conversion system (PCS) and an energy management system (EMS) for controlling the power conversion device a battery management system. The method according to claim 1,
A first reference range for detecting the abnormal state of the battery rack in the control unit and the second reference range for detecting whether the abnormality of the battery rack in the abnormal detection unit is set to be different from the battery management system. 9. The method of claim 8,
The second reference range of the abnormality detection unit is the first reference range so as to detect the abnormality of the battery rack when the diagnostic operation of the battery rack according to the first reference range of the control unit is not normally performed. A more narrowly set battery management system. a battery rack comprising a plurality of battery modules;
a blocking device that cuts off current when an abnormality occurs to protect the battery system;
a battery management system for performing state monitoring for the battery rack;
a power conversion device for converting power transmitted and received with the battery rack; and
and an energy management system that controls the battery management system and the power conversion device to manage the entire power of the battery system,
The battery management system,
a power supply unit for supplying power to the battery management system;
Sensor unit for detecting the state of the battery rack;
a communication unit for performing communication for each of the devices of the battery system including various devices for controlling the power of the battery rack and the battery rack;
a control unit for monitoring the state of the battery rack;
an abnormality detection unit for detecting whether the battery rack is abnormal, and transmitting a power cut-off signal when it is detected that an abnormality has occurred in the battery rack; and
and a power control unit configured to cut off driving power of the communication unit based on the power cut-off signal. detecting whether the battery rack is abnormal;
transmitting a power cut-off signal to the power control unit of the battery management system when it is detected that an abnormality has occurred in the battery rack; and
and cutting off driving power of a communication unit of the battery management system based on the power cut-off signal. 12. The method of claim 11,
When the driving power of the communication unit is cut off, the control method of the battery management system further comprising the step of operating, by the controller of the battery management system, a blocking device inside the battery system. 12. The method of claim 11,
The method of controlling a battery management system further comprising the step of causing at least one of a power conversion device and an energy management system to operate a blocking device inside the battery system. 12. The method of claim 11,
The control method of the battery management system further comprising the step of transmitting information about the LOC state when the abnormal detection of the battery rack to at least one of a control unit, a power conversion device, and an energy management system of the battery management system.

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