KR102547633B1 - Battery management system for managing ess composed of lithium-ion reusable battery - Google Patents

Abstract

According to some embodiments of the present invention, disclosed is a battery management system. The battery management system of the present invention comprises: at least one battery rack that performs monitoring of each cell contained in a battery module consisting of reusable batteries; a server that receives first voltage information for the cell from the at least one battery rack; and a user terminal that receives from the server whether there is an abnormality in the battery module or each cell, wherein the server determines a plurality of voltage values for each cell based on the first voltage information, determines the average voltage value for all cells based on the plurality of the voltage values, and compares the plurality of the voltage values with the average voltage value to determine whether there is an abnormality in each cell.

Description

Battery management system for managing ESS (Energy Storage System) composed of lithium-ion reuse batteries

The present disclosure relates to a battery management system, and more specifically, to a battery management system for managing an energy storage system (ESS) built by recycling lithium ion batteries used and collected in electric buses and electric vehicles.

An energy storage system (ESS) may be a device that stores energy produced in a power plant and supplies the stored power to a place where it is needed. An ESS may include a plurality of batteries for storing electricity. The ESS may include components such as a power conditioning system (PCS), an energy management system (EMS), or a battery management system (BMS) for managing a plurality of batteries.

As demand for electricity increases year by year due to industrial development, the amount of electricity used by consumers also tends to increase. However, even if the amount of power is increasing, it may be difficult to immediately increase power production facilities. To solve this problem, ESSs can be deployed in residential complexes or factory facilities to supply power.

Meanwhile, for the reasons described above, an ESS disposed at a consumer may have a different tendency from a general power supply facility. While general power supply facilities continuously supply power to consumers, ESS can temporarily supply power only when needed. For example, when a temporary problem occurs in a power supply facility supplying power to consumers and there is a disruption in power supply, the ESS may be operated to supply power. Against this background, ESS can exhibit sufficient performance even if it is composed of a lithium ion reuse battery.

Specifically, even if the battery ages, power supplied through discharging may not decrease. Depending on the aging, the battery may be discarded or users may prefer to use a new battery because the maximum charge capacity is reduced compared to the capacity of the new battery. However, as described above, the ESS may be used to temporarily supply power only when necessary. In addition, the amount of power temporarily supplied can be sufficiently supplied through a lithium-ion reusable battery. Therefore, in the case of building an ESS using a lithium-ion reusable battery, it is possible to reduce the cost required to build the ESS. In addition, since discarded batteries are recycled, the environment can also be protected. However, compared to new batteries, reusable batteries may have a problem that it is difficult to find the cause. Therefore, there is a demand for a technology for selecting a defective module during operation of an ESS composed of a lithium ion reusable battery.

The present disclosure has been made in response to the above background art, and is intended to provide a system for selecting defective modules during operation of an ESS composed of a lithium ion reusable battery.

The technical problems of the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present disclosure for solving the above problems, a battery management system is disclosed. The battery management system includes at least one battery rack for monitoring each cell included in a battery module composed of a reusable battery; A server receiving first voltage information about the cell from the at least one battery rack; and a user terminal receiving whether the battery module or each cell has an abnormality from the server. The server determines a plurality of voltage values for each cell based on the first voltage information, determines an average voltage value for all cells based on the plurality of voltage values, and By comparing a plurality of voltage values and the average voltage value, it is possible to determine whether each cell has an abnormality.

In addition, the server determines whether a first voltage value having a difference of 20% or more from the average voltage value exists among the plurality of voltage values, and if the first voltage value exists, the first voltage value and A related first cell may be determined as a bad cell, and battery information related to the first cell may be transmitted to the user terminal.

In addition, the battery information, the first management number of the first cell, the second management number of the first battery module including the first cell, the third management of the first battery rack including the first battery module It may include a number and location information indicating the location of the first battery rack.

In addition, when the plurality of voltage values are determined, the server determines a highest voltage value having the highest value among the plurality of voltage values, and determines an upper voltage value having a difference of less than a preset value from the highest voltage value. determining a lowest voltage value having the lowest value among the plurality of voltage values, determining a lower voltage value having a difference of less than a preset value from the lowest voltage value, and determining the highest voltage value among the plurality of voltage values; The average voltage value may be determined based on normal voltage values excluding the voltage value, the upper voltage value, the lowest voltage value, and the lower voltage value.

In addition, when the average voltage value is determined, the server determines a predetermined previous average voltage value based on the second voltage information received prior to the first voltage information, and compares the average voltage value and the previous average voltage value. Thus, it is possible to determine whether the average voltage value is abnormal.

In addition, the at least one battery rack may determine whether the battery module is being charged and discharged, and when it is determined that the battery module is being charged and discharged, it may perform monitoring for each cell.

The technical solutions obtainable in the present disclosure are not limited to the above-mentioned solutions, and other solutions not mentioned will become clear to those skilled in the art from the description below. You will be able to understand.

According to some embodiments of the present disclosure, it is possible to provide a system capable of selecting defective modules during operation of an ESS composed of a lithium ion reusable battery.

Effects obtainable in the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. .

Various aspects are now described with reference to the drawings, wherein like reference numbers are used to collectively refer to like elements. In the following embodiments, for explanation purposes, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it will be apparent that such aspect(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more aspects.
1 is a diagram for explaining an example of a battery management system according to some embodiments of the present disclosure.
2 is a flowchart illustrating an example of a method in which a server determines whether each cell included in a battery module has an abnormality, according to some embodiments of the present disclosure.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure.

Terms such as first, second, A, B, etc. may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, 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. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In the present disclosure, the battery management system may be composed of at least one battery rack, a server, and a user terminal. At least one battery rack may perform monitoring for each cell included in a battery module composed of reusable batteries. At least one battery rack may monitor voltage, current, temperature, and SOC for each cell. The server may receive information monitored by at least one battery rack from at least one battery rack. For example, the server may receive voltage, current, temperature, and SOC for each cell. Through this, the server can determine whether or not there is an abnormality for each cell. If an abnormality in at least one cell is detected, the server may transmit whether or not there is an abnormality in the cell to the user terminal. Accordingly, the user of the user terminal can replace a cell in which a problem occurs. Hereinafter, a battery management system according to the present disclosure will be described with reference to FIGS. 1 and 2 .

1 is a diagram for explaining an example of a battery management system according to some embodiments of the present disclosure.

Referring to FIG. 1 , the battery management system 1000 may include a server 100 , at least one battery rack 200 and a user terminal 300 . However, since the above-described components are not essential to implement the battery management system 1000, the battery management system 1000 may have more or fewer components than the above-listed components.

Server 100 may include any type of computer system or computer device, such as, for example, a microprocessor, mainframe computer, digital processor, portable device or device controller, and the like.

Server 100 may include typical computer hardware (e.g., computer processors, memory, storage, input and output devices, and other devices that may include components of conventional computing devices; electronic communications devices such as routers, switches, etc.; network attachments). A combination of storage (electronic information storage systems, such as network-attached storage (NAS) and storage area networks (SAN)) and computer software (ie, instructions that cause a computing device to function in a particular way). may be used to achieve desired system performance.

The control unit 110 may typically handle overall operations of the server 100 . The control unit 110 provides or processes appropriate information or functions to the user by processing signals, data, information, etc. input or output through the components of the server 100 or by running an application program stored in the storage unit 120. can do.

The control unit 110 may be composed of one or more cores, such as a central processing unit (CPU), a general purpose graphics processing unit (GPGPU), a tensor processing unit (TPU), and the like. It may include a processor for data analysis of.

The storage unit 120 may include a memory and/or a permanent storage medium. Memory is a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (eg SD or XD memory, etc.), RAM (Random Access Memory, RAM), SRAM (Static Random Access Memory), ROM (Read-Only Memory, ROM), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory), magnetic memory, magnetic disk, optical disk At least one type of storage medium may be included.

The storage unit 120 may store a database built by the control unit 110 . For example, at least one battery rack 200, a battery module provided in each of the at least one battery rack 200, and a plurality of cells included in the battery module may be numbered under a certain rule. The control unit 110 may receive monitoring information for monitoring a plurality of cells from at least one battery rack 200 through the communication unit 130 . The controller 110 may build a database using monitoring information and management numbers for a plurality of cells. The storage unit 120 may store a database built by the control unit 110 .

Communication unit 130 is between the server 100 and the communication system, between the server 100 and at least one battery rack 200, between the server 100 and the user terminal 300 or between the server 100 and the network 400 It may include one or more modules enabling communication between The communication unit 130 may receive monitoring information performed for each cell from at least one battery rack 200 .

A plurality of battery modules may be provided in each of the at least one battery rack 200 . Each of the plurality of battery modules may include a plurality of cells. At least one battery rack 200 may perform monitoring for each of a plurality of cells. For example, at least one battery rack 200 may perform monitoring for voltage, current, temperature and SOC (State Of Charge) of each of a plurality of cells. Here, the SOC may represent a quantitative value indicating the degree of charging of the battery, a quantitative value indicating the degree of current consumption of the battery, or a quantitative value indicating the current remaining charge amount of the battery. At least one battery rack 200 may transmit a monitoring result to the server 100 in real time.

At least one battery rack 200 may include a sensing unit, a control unit, and a communication unit for monitoring each of a plurality of cells. At least one battery rack may be understood as a power conditioning system (PCS), an energy management system (EMS), or a battery management system (BMS) for managing a battery module or each cell included in the battery module.

In the present disclosure, at least one battery rack 200 may determine whether charging and discharging of the battery module is being performed. When it is determined that charging and discharging of the battery module is being performed, at least one battery rack 200 may perform monitoring for each cell. In other words, at least one battery rack 200 may not perform monitoring for each cell when charging and discharging of the battery module is not being performed.

The user terminal 300 may include typical computer hardware (e.g., a computer processor, memory, storage, input and output devices, and other devices that may include components of conventional computing devices; electronic communication devices such as routers, switches, etc.; networks; A combination of electronic information storage systems, such as network-attached storage (NAS) and storage area networks (SAN), and computer software (ie, instructions that cause a computing device to function in a particular way). may be used to achieve desired system performance. The user terminal 300 may include a PC (Personal Computer), a notebook (note book), a mobile terminal, a smart phone (smart phone), a tablet PC (tablet pc), etc. owned by the user, It may include all types of terminals capable of accessing wired/wireless networks.

The user terminal 300 may receive information on whether the battery module or each cell has an abnormality from the server 100 . Accordingly, the user of the user terminal 300 may replace a cell in which a problem occurs.

The network 400 may be a closed network such as a local area network (LAN) and a wide area network (WAN) or an open network such as the Internet. Internet consists of the TCP/IP protocol and several services that exist on its upper layer, namely HTTP (Hyper Text Transfer Protocol), Telnet, FTP (File Transfer Protocol), DNS (Domain Name System), SMTP (Simple Mail Transfer Protocol), SNMP (Simple Network Management Protocol), Network File Service (NFS), and Network Information Service (NIS).

Hereinafter, a method for the server 100 to determine whether or not each cell included in the battery module is abnormal will be described.

2 is a flowchart illustrating an example of a method in which a server determines whether each cell included in a battery module has an abnormality, according to some embodiments of the present disclosure.

Referring to FIG. 2 , the communication unit 130 of the server 100 may receive first voltage information about a cell from at least one battery rack 200 (S110).

The first voltage information may be information obtained by sensing at least one battery rack 200 the voltage value of each cell included in the battery module at preset time intervals. Specifically, at least one battery rack 200 may determine whether charging and discharging of the battery module is being performed. When it is determined that charging and discharging of the battery module is being performed, at least one battery rack 200 may obtain a voltage value of each cell at preset time intervals. For example, at least one battery rack 200 may acquire the voltage value of each cell at intervals of 1 second. At least one battery rack 200 may transmit the first voltage information generated using the voltage value of each cell obtained at intervals of 1 second to the server 100 in real time. Alternatively, at least one battery rack 200 may acquire the voltage value of each cell for a preset time period. For example, at least one battery rack 200 may acquire the voltage value of each cell for 5 minutes at intervals of 1 second. At least one battery rack 200 may transmit the first voltage information generated using the voltage value of each cell obtained for 5 minutes to the server 100.

Upon receiving the first voltage information, the control unit 110 may build a database using the first voltage information.

For example, at least one battery rack 200, a battery module provided in each of the at least one battery rack 200, and a plurality of cells included in the battery module may be numbered under a certain rule. The control unit 110 may build a database by mapping the numbered management number and first voltage information to each of at least one battery rack 200, a battery module, and a plurality of cells.

The controller 110 may determine a plurality of voltage values for each cell based on the received first voltage information (S120). The controller 110 may determine an average voltage value for all cells based on a plurality of voltage values (S130). The controller 110 may compare a plurality of voltage values and an average voltage value for each cell (S140).

If there is a first voltage value having a difference of 20% or more from the average voltage value among the plurality of voltage values (S150, Yes), the controller 110 may determine the first cell related to the first voltage value as a defective cell (S150, Yes). S160).

For example, an average voltage value determined based on a plurality of voltage values for each cell may be 3.9V. The controller 110 may compare an average voltage value and a plurality of voltage values. The controller 110 may determine whether a first voltage value having a magnitude of 4.68V or more exists among a plurality of voltage values. The controller 110 may determine a first cell related to the first voltage value as a defective cell when a first voltage value having a magnitude of 4.68 V or more exists. Alternatively, the controller 110 may determine whether a first voltage value having a magnitude of 3.12V or less exists among a plurality of voltage values. When a first voltage value having a magnitude of 3.12 V or less exists, the controller 110 may determine a first cell related to the first voltage value as a defective cell.

If there is no first voltage value having a difference of 20% or more from the average voltage value among the plurality of voltage values (S150, No), the controller 110 may determine that no defective cell exists.

When the first cell is determined to be a bad cell, the communication unit 130 may transmit battery information related to the first cell to the user terminal under the control of the controller 110 (S170). Here, the battery information includes the first management number of the first cell, the second management number of the first battery module including the first cell, the third management number of the first battery rack including the first battery module, and the first battery. Location information representing the location of the rack may be included. Accordingly, when battery information related to the first cell is received through the user terminal 300, the user can easily find the first cell among a plurality of cells.

According to some embodiments of the present disclosure, the controller 110 may determine a defective candidate cell based on the first voltage information. For example, when a first voltage value having a difference of 10% or more from an average voltage value exists among a plurality of voltage values, the controller 110 may determine a cell related to the first voltage value as a defective candidate cell. When a bad candidate cell is determined, the controller 110 may intensively monitor a voltage related to the bad candidate cell.

Specifically, at least one battery rack 200 may acquire the voltage value of each cell for a preset time period. For example, at least one battery rack 200 may acquire the voltage value of each cell for 5 minutes at intervals of 1 second. At least one battery rack 200 may transmit the first voltage information generated using the voltage value of each cell obtained for 5 minutes to the server 100. In other words, at least one battery rack 200 may transmit the first voltage information to the server 100 at intervals of 5 minutes. Based on the first voltage information, the controller 110 may determine whether there is a first voltage value having a difference of 10% or more from the average voltage value among the plurality of voltage values. When the first voltage value exists, the controller 110 may determine a cell related to the first voltage value as a defective candidate cell. When the bad candidate cell is determined, the controller 110 may transmit a signal for receiving voltage information related to the bad candidate cell in real time to at least one battery rack 200 . In this case, at least one battery rack 200 may transmit voltage information related to a defective candidate cell in real time. For example, at least one battery rack 200 may transmit voltage information related to a defective candidate cell to the server 100 at intervals of 1 second. Further, the controller 110 may determine the defective candidate cell as a defective cell when a voltage value related to the defective candidate cell shows a difference of 20% or more from the average voltage value.

According to some embodiments of the present disclosure, when a plurality of voltage values are determined, the controller 110 may determine a highest voltage value having the highest value among the plurality of voltage values. When the highest voltage value is determined, the controller 110 may determine an upper voltage value having a difference of less than a preset value from the highest voltage value. For example, the controller 110 may determine a voltage value having a difference of less than 10% from the highest voltage value as the upper voltage value. The controller 110 may determine the lowest voltage value having the lowest value among the plurality of voltage values. When the lowest voltage value is determined, the controller 110 may determine a lower voltage value having a difference less than a preset value from the lowest voltage value. For example, the controller 110 may determine a voltage value having a difference of less than 10% from the lowest voltage value as the lower voltage value. When the highest voltage value, the upper voltage value, the lowest voltage value, and the lower voltage value are determined, the controller 110 determines the normal voltage value excluding the highest voltage value, the upper voltage value, the lowest voltage value, and the lower voltage value among the plurality of voltage values. can decide The controller 110 may determine the average voltage value based on the normal voltage value. Also, the controller 110 may compare the average voltage value determined based on the normal voltage value and the plurality of first voltage values.

According to some embodiments of the present disclosure, when the average voltage value is determined, the controller 110 may determine a predetermined previous average voltage value based on the second voltage information received prior to the first voltage information. The controller 110 may compare the average voltage value and the previous average voltage value to determine whether the average voltage value is abnormal.

Specifically, the second voltage information may be obtained prior to the first voltage information. For example, the communication unit 130 generates a voltage value measured from at least one battery rack 200 from 13:00 on December 12, 2022 KST to 13:05 on December 12, 2022 KST. 1 Voltage information can be received. Prior to this, the communication unit 130 generates a voltage value measured from at least one battery rack 200 from KST December 12, 2022 12:55 to KST December 12, 2022 13:00. Voltage information may be received. A previous average voltage value determined using the second voltage information may be stored in the storage 120 . The controller 110 may compare the previous average voltage value and the average voltage value to determine whether the average voltage value is abnormal. For example, the controller 110 may determine that the average voltage value is abnormal when the average voltage value shows a difference of 20% or more from the previous average voltage value. For example, the previous average voltage value determined based on the second voltage information may be 3.9V. When the average voltage value is greater than 4.68V or less than 3.12V, the controller 110 may determine that the average voltage value is abnormal. In this case, the controller 110 may not determine a bad cell. In other words, the controller 110 may not determine whether there is a first voltage value having a difference of 20% or more from the average voltage value among the plurality of voltage values. Then, the controller 110 may transmit a signal for re-acquiring the first voltage information to at least one battery rack 200 through the communication unit 130 . Alternatively, the control unit 110 may generate abnormal information related to a plurality of battery racks 200 and transmit it to the user terminal 300 .

According to some embodiments of the present disclosure, when the first voltage information is received, the controller 110 may determine the third voltage information acquired prior to the first voltage information. The controller 110 may compare the previous average voltage value determined based on the third voltage information and the plurality of voltage values for each cell included in the first voltage information.

For example, the communication unit 130 generates a voltage value measured from at least one battery rack 200 from 13:00 on December 12, 2022 KST to 13:05 on December 12, 2022 KST. 1 Voltage information can be received. Prior to this, the communication unit 130 is a third generated using the voltage value measured from at least one battery rack 200 from KST December 11, 2022 0:00 to KST December 12, 2022 00:00 Voltage information may be received. A previous average voltage value determined using the third voltage information may be stored in the storage 120 . The controller 110 may compare a plurality of voltage values for each cell included in the first voltage information and a previous average voltage value determined using the third voltage information. When a first voltage value having a difference of 20% or more from a previous average voltage value exists among a plurality of voltage values, the controller 110 may determine a first cell related to the first voltage value as a defective cell.

According to some embodiments of the present disclosure, the communication unit 130 may receive first temperature information about cells from at least one battery rack 200 . The controller 110 may determine a plurality of temperature values for each cell based on the first temperature information. The controller 110 may determine an average temperature value for all cells based on a plurality of temperature values. The controller 110 may compare a plurality of temperature values and an average temperature value. The controller 110 may determine whether a first temperature value having a difference of 20% or more from an average temperature value exists among a plurality of temperature values. When the first temperature value exists, the controller 110 may determine the first cell related to the first temperature value as a bad cell.

According to some embodiments of the present disclosure, the controller 110 may determine a defective candidate cell based on the first voltage information. For example, when a first voltage value having a difference of 20% or more from an average voltage value exists among a plurality of voltage values, the controller 110 may determine a cell related to the first voltage value as a defective candidate cell. When the bad candidate cell is determined, the controller 110 may determine the temperature value and the average temperature value of the bad candidate cell. When it is determined that the temperature value of the defective candidate cell has a difference of 20% or more from the average temperature value, the controller 110 may determine the defective candidate cell as a defective cell.

According to some embodiments of the present disclosure, the communication unit 130 may receive first SOC information about a cell from at least one battery rack 200 . The controller 110 may determine a plurality of SOC values for each cell based on the first SOC information. The controller 110 may determine an average SOC value for all cells based on a plurality of SOC values. The controller 110 may compare a plurality of SOC values and an average SOC value. The controller 110 may determine whether there is a first SOC value having a difference of 20% or more from the average SOC value among the plurality of SOC values. When the first SOC value exists, the controller 110 may determine the first cell related to the first SOC value as a bad cell.

According to some embodiments of the present disclosure, the controller 110 may determine a defective candidate cell based on the first voltage information. For example, when a first voltage value having a difference of 20% or more from an average voltage value exists among a plurality of voltage values, the controller 110 may determine a cell related to the first voltage value as a defective candidate cell. When the bad candidate cell is determined, the controller 110 may determine the temperature value and the average temperature value of the bad candidate cell. When it is determined that the temperature value of the defective candidate cell has a difference of 20% or more from the average temperature value, the controller 110 may determine the SOC and the average SOC of the defective candidate cell. When it is determined that the SOC of the bad candidate cell has a difference of 20% or more from the average SOC, the controller 110 may determine the bad candidate cell as a bad cell.

According to the above configuration, the battery management system 1000 may be implemented by at least one battery rack 200 , the server 100 and the user terminal 300 . The server 100 may receive information on each cell included in a battery module composed of reusable batteries from at least one battery rack 200 in real time. The server 100 may determine a defective module or a defective cell based on the received information on each cell. When it is determined that a bad module or a bad cell exists, the server 100 may transmit location information and a management number of the corresponding module or cell to the user terminal 300 . Accordingly, the user can quickly replace or repair a module or a cell that is determined to be defective.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art of this disclosure, and the general principles defined herein may be applied to other embodiments without departing from the scope of this disclosure. Thus, the present disclosure is not to be limited to the embodiments presented herein, but is to be interpreted in the widest scope consistent with the principles and novel features presented herein.

Claims (6)

As a battery management system,
At least one battery rack for monitoring each cell included in the battery module composed of a reusable battery;
A server for receiving the first voltage information for the cell from the at least one battery rack; and
a user terminal receiving whether the battery module or each cell has an abnormality from the server;
including,
The server,
Determine a plurality of voltage values for each cell based on the first voltage information, determine an average voltage value for all cells based on the plurality of voltage values, and determine the plurality of voltage values and the average voltage Compare the values to determine whether each cell is abnormal,
Determine whether a first voltage value having a difference of 10% or more from the average voltage value among the plurality of voltage values exists, and if the first voltage value exists, a first voltage value related to the first voltage value determining a first cell as a first failure candidate cell and intensively monitoring a voltage associated with the first failure candidate cell by receiving voltage information associated with the first failure candidate cell in real time;
Based on the result of the intensive monitoring, it is determined whether the voltage value of the first defective candidate cell has a difference of 20% or more from the average voltage value, and the voltage value of the first defective candidate cell is 20% greater than the average voltage value. When it is determined that the difference is greater than or equal to, determining a temperature value of the first defective candidate cell and an average temperature value for each cell;
When it is determined that the temperature value of the first defective candidate cell has a difference of 20% or more from the average temperature value, determining an SOC value of the first defective candidate cell and an average SOC value for each cell; and
When it is determined that the SOC value of the first defective candidate cell has a difference of 20% or more from the average SOC value, the first defective candidate cell is determined as a defective cell, and battery information related to the defective cell is transmitted to the user terminal. transmitting,
battery management system.
delete According to claim 1,
The battery information,
The first management number of the first cell, the second management number of the first battery module including the first cell, the third management number of the first battery rack including the first battery module and the first battery rack Including location information indicating the location of
battery management system.
According to claim 1,
The server,
When the plurality of voltage values are determined, determining a highest voltage value having a highest value among the plurality of voltage values, determining an upper voltage value having a difference of less than a preset value from the highest voltage value, and determining the plurality of voltage values. determining a lowest voltage value having the lowest value among the voltage values, determining a lower voltage value having a difference of less than a preset value from the lowest voltage value, and determining the highest voltage value among the plurality of voltage values, the upper voltage value Determining the average voltage value based on a normal voltage value excluding the lowest voltage value and the lower voltage value,
battery management system.
According to claim 1,
The server,
When the average voltage value is determined, a predetermined previous average voltage value is determined based on second voltage information received prior to the first voltage information, and the average voltage value is compared with the previous average voltage value to determine the average voltage value. to determine whether the
battery management system.
According to claim 1,
The at least one battery rack,
Determining whether charging and discharging of the battery module is being performed, and performing monitoring for each cell when it is determined that charging and discharging of the battery module is being performed,
battery management system.

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