WO2024136269A1 - 배터리 관리 장치 및 그것의 동작 방법 - Google Patents
배터리 관리 장치 및 그것의 동작 방법 Download PDFInfo
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- WO2024136269A1 WO2024136269A1 PCT/KR2023/020464 KR2023020464W WO2024136269A1 WO 2024136269 A1 WO2024136269 A1 WO 2024136269A1 KR 2023020464 W KR2023020464 W KR 2023020464W WO 2024136269 A1 WO2024136269 A1 WO 2024136269A1
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- battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
Definitions
- Embodiments disclosed herein relate to a battery management device, a method of operating the same, and a storage device.
- Electric vehicles receive electricity from outside, charge the battery, and then use the voltage charged in the battery to drive the motor to obtain power.
- Batteries undergo internal transformation and denaturation through various charging and discharging during the production and use stages, and their physical and chemical properties change, which can lead to defects in which lithium ions from the battery's positive electrode are not reduced into the negative electrode but are deposited on the negative electrode surface.
- One purpose of the embodiments disclosed in this document is to provide a battery management device and a method of operating the same that can accurately diagnose a defective battery bank using the voltage behavior of the battery banks during their idle period.
- a battery management device includes a voltage measurement unit that measures the voltage of each of a plurality of battery banks; and a controller, wherein the controller is capable of communicating with the voltage measurement unit, and sets a first value that is the amount of change in voltage during a certain period of each of the plurality of battery banks and a standard amount of voltage change per unit time of each of the plurality of battery banks.
- a first value of each of the plurality of battery banks is selected based on a second value that is a deviation, and a ratio of the selected first value of each of the plurality of battery banks to the average value of the selected first value of each of the plurality of battery banks is calculated.
- the first value of at least one battery bank among the plurality of battery banks is less than the second value of the at least one battery bank multiplied by a lower threshold value
- the first value Initialize without using it to diagnose problems with the battery bank.
- the first Select when the first value of at least one battery bank among the plurality of battery banks exceeds a value obtained by multiplying the second value of the at least one battery bank by an upper threshold value, the first Select a value and use it to diagnose battery bank abnormalities.
- the controller determines that the first value of at least one battery bank among the plurality of battery banks is equal to or greater than the second value of the at least one battery bank multiplied by a lower threshold value, and the second value is If the value is less than or equal to the value multiplied by the upper limit threshold, the first value of the at least one battery bank is accumulated to diagnose an abnormality in the battery bank.
- the controller determines the average value of the selected first value of each of the plurality of battery banks and the maximum value of the second value of each of the plurality of battery banks multiplied by the upper threshold value for each of the plurality of battery banks.
- the ratio of the selected first value is calculated as the first reference value for each of the plurality of battery banks.
- the controller sets the ranking of the plurality of battery banks according to the order in which the first reference value is higher, and the first battery bank is ranked first among the plurality of battery banks, and the second battery bank is ranked second. 2 battery bank and the third battery bank, which is ranked last.
- the controller calculates a first deviation that is the difference between the first reference value of the first battery bank and the first reference value of the second battery bank, and calculates the first reference value of the second battery bank and the first reference value of the second battery bank.
- a second deviation which is the difference between the first reference value of the battery bank, and diagnose whether there is an abnormality in the first battery bank at the specific time based on the second reference value, which is a ratio of the first deviation to the second deviation. do.
- the controller controls the first battery when the first reference value of the first battery bank exceeds the first threshold and the second reference value of the first battery bank exceeds the second threshold. Diagnose the bank as a defective battery bank.
- a method of operating a battery management device includes measuring the voltage of each of a plurality of battery banks; calculating a first value, which is the amount of change in voltage of each of the plurality of battery banks during a certain period; calculating a second value that is a standard deviation of the amount of voltage change per unit time for each of the plurality of battery banks; selecting a first value for each of the plurality of battery banks based on a first value and a second value for each of the plurality of battery banks; setting a ranking of each of the plurality of battery banks based on a first reference value that is a ratio of the selected first value of each of the plurality of battery banks to an average value of the selected first values of the plurality of battery banks; and diagnosing that there is a problem with at least one battery bank among the plurality of battery banks based on the ranking of each of the plurality of battery banks at the specific time.
- the step of selecting a first value for each of the plurality of battery banks by comparing the first value and the second value calculated at the predetermined time interval includes selecting at least one battery bank among the plurality of battery banks. If the first value of is less than the value obtained by multiplying the second value of the at least one battery bank by the lower limit threshold, the first value is initialized without being used to diagnose an abnormality in the battery bank.
- the step of selecting a first value of each of the plurality of battery banks based on the first value and the second value of each of the plurality of battery banks includes the selection of at least one battery bank among the plurality of battery banks. If the first value exceeds a value obtained by multiplying the second value of the at least one battery bank by an upper threshold value, the first value is maintained and used to diagnose a problem in the battery bank.
- the step of selecting a first value of each of the plurality of battery banks based on the first value and the second value of each of the plurality of battery banks includes the selection of at least one battery bank among the plurality of battery banks. If the first value is greater than or equal to the value obtained by multiplying the second value of the at least one battery bank by the lower limit threshold and less than or equal to the value obtained by multiplying the second value by the upper limit threshold, the first value is accumulated to detect an abnormality in the battery bank. Diagnose.
- each of the plurality of battery banks is based on a first reference value that is a ratio of the selected first value of each of the plurality of battery banks to the average value of the selected (corrected) first values of each of the plurality of battery banks.
- the step of setting the rank is the average value of the selected first value of each of the plurality of battery banks and the maximum value of the second value of each of the plurality of battery banks multiplied by the upper threshold value compared to the maximum value of the selected first value of each of the plurality of battery banks.
- the ratio of the first value is calculated as the first reference value for each of the plurality of battery banks.
- the plurality of battery banks are based on a first reference value that is a ratio of the selected (corrected) first value of each of the plurality of battery banks to the average value of the selected (corrected) first values of the plurality of battery banks.
- the step of setting the ranking of each battery bank is to set the ranking according to the order in which the plurality of battery banks are listed in order of highest first reference value, and among the plurality of battery banks, the first battery bank is ranked first and the second battery bank is ranked second. 2 battery bank, and the third battery bank, which is ranked last, are judged.
- the step of diagnosing the presence or absence of an abnormality in at least one battery bank among the plurality of battery banks based on the ranking of each of the plurality of battery banks at the specific point in time includes a first reference value of the first battery bank.
- a first deviation is calculated as the difference between the first reference value of the second battery bank and the first reference value of the second battery bank
- a second deviation is calculated as the difference between the first reference value of the second battery bank and the first reference value of the third battery bank
- the step of diagnosing at least one battery bank among the plurality of battery banks based on the ranking of each of the plurality of battery banks at the specific point in time is performed when the first reference value of the first battery bank is the first If the threshold value is exceeded, and the second reference value of the first battery bank is greater than the second threshold value, the first battery bank is diagnosed as a defective battery bank.
- the controller includes: memory; and a processing unit coupled to the memory and configured to execute an operation method of the battery management device.
- a non-transitory computer-readable storage medium includes measuring the voltage of each of a plurality of battery banks; calculating a first value, which is the amount of change in voltage of each of the plurality of battery banks during a certain period; calculating a second value that is a standard deviation of the amount of voltage change per unit time for each of the plurality of battery banks; selecting a first value for each of the plurality of battery banks based on a first value and a second value for each of the plurality of battery banks; setting a ranking of each of the plurality of battery banks based on a first reference value that is a ratio value of the selected first value of each of the plurality of battery banks to an average value of the selected first values of the plurality of battery banks; and storing a program for executing the step of diagnosing that there is a problem with at least one battery bank among the plurality of battery banks based on the ranking of each of the plurality of battery banks at the specific time.
- the step of diagnosing the presence or absence of an abnormality in at least one battery bank among the plurality of battery banks based on the ranking of each of the plurality of battery banks at the specific point in time includes a first reference value of the first battery bank.
- a first deviation is calculated as the difference between the first reference value of the second battery bank and the first reference value of the second battery bank
- a second deviation is calculated as the difference between the first reference value of the second battery bank and the first reference value of the third battery bank
- the first battery bank when the first reference value of the first battery bank exceeds the first threshold and the second reference value of the first battery bank exceeds the second threshold, the first battery bank is detected as having an abnormality. Diagnose with battery bank.
- FIG. 1 is a diagram showing a battery pack according to an embodiment disclosed in this document.
- FIG. 2 is a block diagram showing the configuration of a battery management device according to an embodiment disclosed in this document.
- FIG. 3 is a flowchart showing a method of operating a battery management device according to an embodiment disclosed in this document.
- FIG. 4 is a flowchart showing a method of operating a battery management device according to another embodiment disclosed in this document.
- FIG. 5 is a graph showing voltage changes at regular time intervals during an idle period of a battery bank according to an embodiment disclosed in this document.
- FIG. 6 is a graph showing a change in the first value of a battery bank at regular time intervals according to an embodiment disclosed in this document.
- FIG. 7 is a graph showing a change in a second value of a battery bank at regular time intervals according to an embodiment disclosed in this document.
- FIG. 8 is a graph showing a change in a first reference value of a battery bank at regular time intervals according to an embodiment disclosed in this document.
- Figure 9 is a block diagram showing the hardware configuration of a computing system that implements a method of operating a battery management device according to an embodiment disclosed in this document.
- the battery pack 1000 may include a battery module 100, a battery management device 200, and a relay 300.
- the battery module 100 may be a battery cell, and in this case, the battery pack 1000 omits the module and inserts the cells directly into the pack, unlike existing batteries where a plurality of cells form a module and the module forms a package. It can have a cell to pack structure that is assembled.
- the battery pack 1000 may have a stacked structure of multiple battery modules.
- the battery module 100 may include a plurality of battery banks 110, 120, 130, 140, 150, 160, and 170. Although it is shown in FIG. 1 that there are seven battery banks, the battery module 100 is not limited thereto, and the battery module 100 may be configured to include n (n is a natural number of 1 or more) battery banks.
- the battery module 100 may supply power to a target device (not shown). To this end, the battery module 100 may be electrically connected to the target device.
- the target device may include an electrical, electronic, or mechanical device that operates by receiving power from the battery pack 1000 including the battery module 100.
- the target device may include an electric vehicle (EV). , Electric Vehicle) or an energy storage system (ESS), but is not limited thereto.
- EV electric vehicle
- ESS energy storage system
- Each of the plurality of battery banks 110 to 170 included in the battery module 100 may be composed of a single cell or may be composed of a plurality of battery cells arranged in series or parallel.
- each battery bank may have the same number of cells connected in series or parallel.
- the plurality of battery banks 110 to 170 may be electrically connected to each other in series or parallel within the battery module 100 to form a cell module assembly (CMA).
- CMA cell module assembly
- a plurality of battery cells included in each of the plurality of battery banks 110-170 are the basic units of batteries that can be used by charging and discharging electrical energy, and include lithium-ion (Li-ion) batteries and lithium-ion polymer (Li- ion polymer) battery, nickel cadmium (Ni-Cd) battery, nickel hydrogen (Ni-MH) battery, etc., but is not limited thereto.
- the battery management system (BMS, Battery Management System) 200 may manage and/or control the status and/or operation of the battery module 100.
- the battery management device 200 may manage the charging and/or discharging of a plurality of battery banks 110-170 included in the battery module 100, and may manage the status and/or Manage and/or control operations.
- the battery management device 200 can control the operation of the relay 300.
- the battery management device 200 may short-circuit the relay 300 to supply power to the target device, and may short-circuit the relay 300 when a charging device is connected to the battery pack 1000. .
- the battery management device 200 may monitor the voltage, current, temperature, etc. of the battery module 100 and/or each of the plurality of battery banks 110 to 170 included in the battery module 100. Additionally, for monitoring by the battery management device 200, sensors or various measurement modules, not shown, may be additionally installed at arbitrary locations such as the battery module 100 or the charging/discharging path. The battery management device 200 calculates parameters indicating the state of the battery module 100, for example, SOC (State of Charge) or SOH (State of Health), based on monitored measured values such as voltage, current, and temperature. can do.
- SOC State of Charge
- SOH State of Health
- the battery management device 200 can diagnose abnormalities within the plurality of battery banks 110 to 170 based on data on various factors that change as the battery banks deteriorate.
- the battery management device 200 uses the voltage data of each of the plurality of battery banks 110-17 to detect a disconnection of an electrode tab or a battery cell in which an electrode tab of the plurality of battery banks 110-170 is disconnected.
- a battery bank containing battery cells with lithium dendrite can be diagnosed as an abnormal bank.
- lithium precipitation is a phenomenon in which lithium ions from the positive electrode cannot chemically bond to the negative electrode during battery cell charging, and the lithium ions exist in metal form on the surface of the negative electrode.
- lithium ions from the positive electrode of the battery cell are reduced to the negative electrode when charging, but in the case of a defective battery cell, some lithium ions may precipitate in the form of lithium metal on the surface of the negative electrode.
- lithium by-products grow due to repeated lithium precipitation, they may contact the anode or anode collector, causing an internal short between the cathode and anode of the battery cell.
- voltage deviation from a normal battery bank may occur due to self-discharge over time.
- battery cells may have a disconnection at the positive or negative tab due to various reasons, such as defects in the production stage, internal deformation and degeneration through multiple charging and discharging, or external shock.
- the electrode of the disconnected battery cell and the electrode of the normal battery cell may be connected to each other by lithium deposits.
- the negative electrode of the disconnected battery cell has a higher charge (SOC) than the negative electrode of the normal battery, the negative electrode of the two battery cells will come into contact with lithium precipitates, causing charging to occur from the negative electrode of the disconnected battery cell to the negative electrode of the normal battery. You can. Therefore, battery cells with both lithium precipitation and electrode tab disconnection problems may experience faster and larger voltage changes than normal battery cells.
- the battery management device 200 utilizes the phenomenon that a battery cell in which electrode tab disconnection and lithium precipitation occur simultaneously has a faster and larger voltage change than a normal battery cell in the resting state, By comparing the voltage data in the resting period of a battery bank with the statistical normal voltage data in the resting period of a normal battery bank, a battery bank containing a battery cell in which electrode tab disconnection and lithium precipitation has occurred can be diagnosed as a problem bank.
- the idle period of a battery cell or module means a state in which the battery cell or module is not being charged or discharged, or is not electrically connected to a load.
- the battery management device 200 may detect whether a battery module or cell is in an idle state by monitoring cell voltage values or charge/discharge current values of the battery module.
- the operation of the battery management device 200 below is performed by receiving wired or wireless signals from various devices such as a server, cloud, charger, or charger or charger connected to the battery management device 200 or a vehicle equipped with the battery management device 200. It can be performed through various devices such as a server, cloud, charger, or charger or charger connected to the battery management device 200 or a vehicle equipped with the battery management device 200. It can be performed through various devices such as a server, cloud, charger, or charger or charger connected to the battery management device 200 or a vehicle equipped with the battery management device 200. It can be performed through
- FIG. 2 is a block diagram showing the configuration of a battery management device 200 according to an embodiment disclosed in this document.
- the configuration of the battery management device 200 may vary depending on the usage environment and purpose of the battery pack 1000 including the battery module 100, and may include various different operating components.
- the battery management device 200 may include a voltage measurement unit 210 and a controller 220.
- the controller 220 may include a calculation unit 230, a diagnosis unit 240, and a control unit 250.
- the battery management device 200 may additionally include a current measurement unit and/or a temperature measurement unit in addition to the voltage measurement unit 210.
- the voltage measuring unit 210 is composed of a measuring device capable of measuring the voltage of a battery bank and/or cell, including a voltage meter, etc., and measures the voltage of each of the plurality of battery banks 110-170 for a certain period of time. By measuring at intervals, time-series voltage data for each of the plurality of battery banks 110-170 can be calculated. Specifically, the voltage measurement unit 210 can calculate voltage rise and fall in charging, discharging, and rest periods, and long-term stabilization (relaxation) data.
- the calculation unit 230 uses the voltage data measured by the voltage measurement unit 210 to perform various calculations for diagnosing an abnormal battery bank, which will be described below, and the diagnosis unit 240 uses the calculation results to determine the conditions described below.
- the presence or absence of an abnormality in the battery bank is diagnosed by checking the following, and the control unit 250 can use the diagnosis results to take appropriate measures for the battery bank, such as monitoring the abnormal battery bank or notifying the user of the abnormality.
- FIG. 3 is a flowchart showing a method of operating a battery management device according to an embodiment disclosed in this document.
- the operating method of the battery management device may include steps S11 to S16. According to an embodiment, the operating method of the battery management device may be performed by the battery management device 200.
- the battery management device 200 may measure the voltage of each of the plurality of battery banks. In step S12, the battery management device 200 may calculate a first value, which is the amount of change in voltage during a certain period of each of the plurality of battery banks. In step S13, the battery management device 200 may calculate a second value that is the standard deviation of the amount of voltage change per unit time for each of the plurality of battery banks.
- the battery management device 200 may select a first value for each of the plurality of battery banks based on the first value and the second value for each of the plurality of battery banks.
- the battery management device 200 manages each of the plurality of battery banks based on a first reference value that is a ratio of the selected first value of each of the plurality of battery banks to the average value of the selected first values of the plurality of battery banks. You can set the ranking.
- the battery management device 200 may diagnose at least one battery bank among the plurality of battery banks based on the ranking of each of the plurality of battery banks at a specific point in time.
- FIG. 4 is a flowchart showing a method of operating the battery management device 200 according to an embodiment disclosed in this document.
- the method of operating the battery management device includes measuring the first voltage of each of the plurality of battery banks at regular time intervals (S110), and measuring the first voltage of each of the plurality of battery banks measured at regular time intervals. Calculating a first value, which is the amount of voltage change, using the first voltage at regular time intervals (S120), measuring the second voltage per unit time during a constant time interval for each of the plurality of battery banks, and measuring the second voltage per unit time for each of the plurality of battery banks.
- Calculating a second value which is the standard deviation of the voltage change amount of the second voltage measured per unit time at the constant time interval, at regular time intervals using the second voltage (S130), and the first value calculated at regular time intervals
- step S110 the voltage measurement unit 210 measures the voltage of each of the plurality of battery banks 110-170 at regular time intervals, and the controller 220 measures the voltage of each of the plurality of battery banks 110-170. You can create a graph showing change.
- Figure 5 is a graph recorded by measuring the voltage of each battery bank (110-170) at time points (t1-t12) set at intervals of 600 seconds after the time point (t0) when the dormant period starts according to an embodiment disclosed in this document. . That is, in the example of FIG. 5, the t0 mark on the horizontal axis represents the point at which the resting period begins, and the t12 mark represents the point at which 7,200 seconds have passed since the resting period began.
- a battery bank or cell shows a relatively rapid decrease in voltage for a relatively short period of time (for example, about 600 seconds) from the start of the dormant period, and then shows a gradual decrease.
- a relatively rapid decrease in voltage for a relatively short period of time for example, about 600 seconds
- the voltage of each battery bank shows a value of around 3.98 Volt at point t0, where the dormant period begins, but rapidly decreases to around 3.92 Volt at 600 seconds (t1) from point t0. is giving Referring to FIG. 5, the voltage measurement unit 210 may measure the voltage of each of the plurality of battery banks 110 to 170 at a time point (t1) 600 seconds after the rest period starts (t0). Next, if the predetermined time interval is 600 seconds, the voltage measurement unit 210 measures the voltage of each of the plurality of battery banks 110 to 170 at time t2, 600 seconds after t1.
- the voltage measurement unit 210 measures the voltage of each of the plurality of battery banks 110-170 at time t3, which is 600 seconds from time t2 (i.e., 1,200 seconds from time t1). do.
- the voltage measurement unit 210 may repeatedly measure the voltage of each of the plurality of battery banks 110 - 170 at each time point t4 - t12 and generate a graph as shown in FIG. 5 .
- step S120 the calculation unit 230 uses the voltage data measured in step S110 to calculate a first value that is the amount of change in voltage at a certain time interval (for example, 600 seconds) for each of the plurality of battery banks 110-170.
- ( ⁇ V) can be calculated.
- FIG. 6 which is a graph showing the first value ( ⁇ V) of each battery bank according to an embodiment disclosed in this document
- the calculation unit 230 calculates the first value from time t1 to time t2. 1
- the reference value ( ⁇ V) can be calculated, for example, by subtracting the voltage value at time t2 from the voltage value at time t1.
- the calculation unit 230 calculates the voltage measured at a time point (t1) 600 seconds after the rest period of each of the plurality of battery banks 110-170 and the voltage measured at a time point (t0) when the rest period starts. Compare the voltage measured at point t2 to calculate a first value ( ⁇ V), which is the amount of change in voltage of each of the plurality of battery banks 110-170 for 600 seconds, and calculate the first value ( ⁇ V) at point t2. can be displayed. The calculation unit 230 may repeat this process to calculate and display the first value ( ⁇ V) of each of the plurality of battery banks 110-170 at each point of the remaining time points (t3-t12). In the graph of FIG.
- the first value ( ⁇ V) of the battery bank 170 appears higher than that of other battery banks in the section between time t11 and time t12, so the battery bank 170 is an abnormal battery. It may be a bank. In another embodiment, the amount of voltage change may be calculated by setting the constant time interval to 200 seconds instead of 600 seconds.
- step S130 the voltage measurement unit 210 and the calculation unit 230 measure the amount of voltage change per unit time (e.g., 1 second) at a constant time interval for each of the plurality of battery banks 110-170, and determine the standard amount of these voltage changes.
- the second value ( ⁇ dv ), which is standard deviation ( ⁇ ) can be calculated.
- the voltage measuring unit 210 separately from step S110 described above, measures a plurality of batteries at 1 second intervals within 600 seconds, which is a certain time interval (e.g., starting from each point of t2-t12 to the next time point).
- the voltage of each of the banks 110-170 is measured, and based on the voltage value measured per unit time, the calculation unit 230 calculates the voltage change amount and a second value ( ⁇ dv ) which is the standard deviation ( ⁇ ) of the voltage change amount for 1 second. ) can be calculated.
- FIG. 7 is a graph showing the change in the second value ( ⁇ dv ) repeatedly calculated at each point of t2-t12 for each of the plurality of battery banks 110-170, according to an embodiment disclosed in this document.
- the calculation unit 230 starts from the time point t1 (e.g., 600 seconds after the rest period) to the time point t2 (e.g., 1,200 seconds after the rest period) every 1 second within 600 seconds.
- the voltage can be measured each time, the amount of voltage change per unit time and the standard deviation ( ⁇ ) between time point (t1) and time (t2) can be calculated and recorded at time t2.
- the calculation unit 230 measures the voltage every 1 second within 600 seconds starting from time t2 to time t3 (e.g., 1,800 seconds after the rest period), and calculates the voltage change per unit time and the time point.
- the standard deviation ( ⁇ ) between (t2) and time point (t3) can be calculated and recorded at time point (t3).
- the calculation unit 230 measures the voltage every 1 second within 600 seconds starting from time t3 to time t4 (e.g., 2,400 seconds after the rest period), and calculates the amount of voltage change per unit time and the time point (
- the standard deviation ( ⁇ ) between t3) and time point (t4) can be calculated and recorded at time point (t4).
- This measurement, calculation, and recording process can be repeated until a time point t12 (e.g., a time point 7,200 seconds after the rest period) to generate a graph as shown in FIG. 7.
- the second value may be calculated by measuring the hourly voltage at 200 second intervals rather than at 600 second intervals.
- the step of calculating the second value ( ⁇ dv ) may be performed in a separate process from the step of calculating the first value ( ⁇ V) described above, so the order of calculating the first value ( ⁇ V) is also, for example, It can also be executed before the step.
- step S140 the calculation unit 230 compares the first value ( ⁇ V) and the second value ( ⁇ dv ) calculated at each point (t2-t12) of each of the plurality of battery banks 110-170 to determine the first value.
- ( ⁇ V) can be selected.
- selecting the first value ( ⁇ V) refers to determining whether the calculated first value ( ⁇ V) is a valid value that can be used to diagnose a faulty battery bank according to the size of the second value ( ⁇ dv ).
- the second value ⁇ dv of each of the plurality of battery banks 110-170 determines whether the first value ⁇ V of each of the plurality of battery banks 110-170 is a valid value or noise data.
- the calculation unit 230 compares the first value ( ⁇ V) with the second value ( ⁇ dv ) at each time point (t2-t12) of the plurality of battery banks 110-170 and calculates each first value. When ( ⁇ V) is determined to be less than the value calculated using the second value, it may be determined to be noise data that cannot be used for battery bank diagnosis. In this case, the calculation unit 230 may initialize the first value ( ⁇ V).
- the first value ( ⁇ V) at a specific point in time (eg, t3) of the specific battery bank 110 is 0.2 mV
- the second value ( ⁇ dv ) is 0.3 mV
- the calculation unit 230 determines that the first value ( ⁇ V) of at least one battery bank among the plurality of battery banks 110-170 is equal to the upper threshold (Upper Threshold) of the second value ( ⁇ dv ) of at least one battery bank. , UT), the first value ( ⁇ V) is determined to be a value that can be used for diagnosis of the battery bank, and this can be maintained as valid data for diagnosis. For example, at a specific point in time (eg, t3), the first value ( ⁇ V) of the battery bank 110 is 0.7 mV, the second value ( ⁇ dv ) is 0.3 mV, and the upper threshold (Upper Threshold, UT) is 0.7 mV.
- the first value ( ⁇ V) at a specific point in time, 0.7 mV is greater than the second value ( ⁇ dv ), 0.3 mV, multiplied by the upper threshold (UT) 2, which is 0.6 mV. Therefore, 0.7 mV, which is the first value ( ⁇ V) at this point, is determined to be valid data and is used to diagnose abnormalities in the battery bank. That is, for example, the calculation unit 230 divides 0.7 mV, which is the first value ( ⁇ V) at the corresponding point (eg, t3) of the battery bank (eg, 110), into the second value ( ⁇ dv ) selected by the second value ( ⁇ dv ). It can be confirmed as 1 value ( ⁇ V). According to one embodiment, the selected first value ( ⁇ V) may be distinguished from the first value ( ⁇ V) before selection and may be displayed as, for example, dV.
- the calculation unit 230 determines that the first value ( ⁇ V) of at least one battery bank among the plurality of battery banks 110-170 is equal to the lower limit threshold (LT) to the second value ( ⁇ dv ) of the at least one battery bank. If it is greater than the value multiplied by , and is less than the value multiplied by the second value ⁇ dv by the upper threshold value UT, the first value ⁇ V of the battery bank can be accumulated and used for later diagnosis of the battery bank.
- the calculation unit 230 determines that the first value ( ⁇ V) of the battery bank is greater than or equal to the second value ( ⁇ dv ) multiplied by the lower limit threshold (LT) (eg, 0.3 mV), and the second value If it is less than the value (eg, 0.6mV) multiplied by the upper limit threshold (UT), the first value ( ⁇ V) of the battery bank is not judged as noise data, but the size of the first value ( ⁇ V) is sufficient to diagnose the battery bank. If it is determined that this is not enough, the first value ( ⁇ V) of the battery bank can be accumulated, and the battery bank can be diagnosed later using the accumulated amount of the first value ( ⁇ V) over several cycles.
- LT lower limit threshold
- the calculation unit 230 recalculates the voltage of each of the plurality of battery banks 110-170 and adds the newly calculated first value ( ⁇ V) to the previously stored first value ( ⁇ V) to obtain a cumulative calculated first value. ( ⁇ V) can be compared again with the second value ( ⁇ dv ).
- the calculation unit 230 compares the first value ( ⁇ V) of each of the plurality of battery banks 110-170 with the second value ( ⁇ dv ) to determine the first value ( ⁇ V) determined to be noise data. It can be initialized or the first value ( ⁇ V) can be accumulated for several cycles. Accordingly, unnecessary diagnosis due to reflection of noise data can be avoided, thereby preventing over-testing of the battery bank.
- the first value ( ⁇ V) selected by comparing the first value ( ⁇ V) and the second value may be represented in a graph similar to that of FIG. 6.
- the calculation unit 230 may calculate the average value (AVG_ ⁇ V) of the selected first values ( ⁇ V) of each of the plurality of battery banks 110-170. In addition, the calculation unit 230 sets an upper limit to the average value (AVG_ ⁇ V) of the selected first values ( ⁇ V) of the plurality of battery banks 110-170 and the second value ⁇ dv of each of the plurality of battery banks 110-170.
- the maximum value (Max) can be calculated among the values multiplied by the threshold value (UT) (eg, 2).
- the calculation unit 230 sets an upper limit threshold ( The ratio (Ratio) of the selected first value ( ⁇ V) of each of the plurality of battery banks to the maximum value of the value multiplied by UT) is a first reference value (Ratio) at a constant time interval for each of the plurality of battery banks (110-170) It can be calculated as R1).
- the calculation unit 230 may calculate the first reference value (R1) of each of the plurality of battery banks 110-170 based on [Equation 1] below.
- the calculation unit 230 may use the Max function as the denominator of [Equation 1] for calculating the first reference value (R1). Specifically, the calculation unit 230 uses the Max function to calculate the average value (AVG_ ⁇ V) of the selected first values of the plurality of battery banks 110-170 and the second value ( ⁇ dv ) of each of the plurality of battery banks 110-170. The maximum value among the values multiplied by the upper limit threshold (UT) can be entered into the denominator of [Equation 1].
- the calculation unit 230 uses the Max function in the denominator of [Equation 1] to set the upper limit threshold (UT) to the second value ( ⁇ dv ), where the size of the selected first value ( ⁇ V) of the battery bank is the noise level.
- the battery bank can be diagnosed using the first reference value (R1) only when it is above a certain level compared to the multiplied value, thereby reducing unnecessary diagnosis.
- FIG. 8 is a graph showing a change in the first reference value of a battery bank according to an embodiment disclosed in this document.
- the first reference value R1 of each of the plurality of battery banks 110 to 170 calculated by the calculation unit 230 is displayed at each point from t2 to t12 (eg, 600 seconds).
- Each of these first reference values (R1) is, for example, the selected first value ( ⁇ V) and the first value ( ⁇ V) of each of the plurality of battery banks 110-170 calculated at intervals of 600 seconds (or 200 seconds) by the calculation unit 230. 2 These are values calculated by inputting the value ( ⁇ dv ) into Equation 1 above.
- Other aspects of FIG. 8 including calculation of the second reference value (R2) will be described later.
- the calculation unit 230 ranks each of the plurality of battery banks 110-170 based on the calculated first reference value (R1) of each of the plurality of battery banks 110-170 at each time interval t2-t12. It can be set by or at a specific point in time.
- the calculation unit 230 recognizes the battery bank 170 with the largest first reference value (R1) at a specific time point (t12) as the battery bank listed first, using the time point (t12) as the diagnosis time point. It is designated as the first battery bank (B1), and at a specific point in time (t12), the battery bank 160 with the next largest first reference value (R1) is recognized as the second-ranked battery bank and designated as the second battery bank (B2). And, at a specific point in time (t12), the battery bank 110 with the smallest first reference value (R1) may be recognized as the last ranked battery bank and designated as the third battery bank (B3).
- step S170 the calculation unit 230 calculates the second reference value (R2) using the first reference value (R1) shown in FIG. 8 and Equation 2 below.
- the calculation unit 230 is the diagnostic target of the potential problem battery bank with the largest amount of voltage change based on the first reference value (R1) at the diagnosis time (t12), as shown in FIG. 8. 1
- the first deviation (D1) which is the difference between the first reference value (R1 B1 ) of the battery bank (B1) and the first reference value (R1 B2 ) of the second battery bank (B2), and based on the first reference value (R1)
- the second deviation (D2) is the difference between the first reference value (R1 B2 ) of the second battery bank (B2) with the second voltage change amount and the first reference value (R1 B3 ) of the third battery bank (B3) with the smallest voltage change amount.
- the contrast ratio can be calculated as the second reference value (R2).
- the diagnostic unit 240 additionally checks the conditions described below and determines the first battery bank showing the largest value based on the first reference value (R1). (B1) It is finally determined whether the battery bank 170 (e.g., battery bank 170) is a defective battery bank.
- the battery bank 170 e.g., battery bank 170
- step S180 the diagnosis unit 240 determines whether the first battery bank (e.g., battery bank 170) determined in S160 shows the largest first reference value (R1) within the battery module 100 at a specific point in time (e.g., t12). (1st condition).
- the battery bank 170 which was determined to be the first battery bank (B1), was determined to have the largest first reference value (R1) within the battery module 100.
- step S190 the diagnosis unit 240 determines whether the first reference value (R1) of the first battery bank (e.g., battery bank 170) is greater than or equal to the first predetermined threshold value (R1_threshold) at a specific time point (t12). In the example of FIG. 8, it is determined that the first reference value of the battery bank 170 is greater than 1.5, which is a predetermined first threshold value (second condition).
- R1_threshold the first predetermined threshold value
- step S200 the diagnostic unit 240 checks whether the second reference value R2 calculated above is greater than the predetermined second threshold R2_threshold at a specific time point t12 (third condition).
- the first reference value (R1) of the battery bank 170 is 1.75
- the first reference value (R1) of the battery bank 160 is 1.05
- the first reference value (R1) of the battery bank 110 is 1.05. 1 Since the reference value (R1) indicates 0.7
- the second reference value is 2 (0.7/0.35), which is greater than the predetermined second threshold (R2_threshold) of 1.
- step S210 all three conditions above are confirmed, and the diagnostic unit 240 determines that the battery bank 170, which is determined to be the first battery bank B1, satisfies all three conditions at the time of diagnosis (t12), so there is no problem. Diagnose with battery bank. That is, according to one embodiment, the diagnostic unit 240 diagnoses the battery bank 170 as a battery bank including a battery cell in which an electrode tab disconnection occurred or a battery bank including a battery cell in which an electrode tab disconnection and lithium precipitation occurred. can do.
- control unit 250 can track and monitor whether an internal short circuit occurs in the battery bank 170, which has been diagnosed as a defective battery bank, and also provide information about the battery bank 170 to the user.
- control unit 250 can provide information about the electrode tab disconnection or the battery bank 170 in which electrode tab disconnection and lithium precipitation occurred to the user terminal through a communication unit (not shown), as well as to the vehicle or charger, etc.
- Information about the battery bank 170 may be provided through the provided display.
- step S110 At a specific point in time (t12), if any of the conditions in steps S180, S190, and S200 are not met, the process returns to step S110 and continues measurement and calculation. In another embodiment, rather than returning to step S110, processing may return to one of the previous steps and continue performing diagnostics.
- a battery bank including a battery cell in which an electrode tab disconnection occurs or an electrode tab disconnection and lithium A battery bank containing battery cells in which precipitation has occurred can be diagnosed.
- the conventional method of diagnosing lithium precipitation phenomenon used the voltage data of the rest period after charging of the battery in which large amounts of lithium precipitation occurred. However, this method only used the method to determine whether the voltage was abnormal because the effect of lithium precipitation on the measured voltage of the battery was minimal. There is a problem that is difficult to solve.
- the battery management device 200 of the present invention compares the voltage change amount of each of the plurality of battery banks based on the amount of voltage change in the idle state of the plurality of battery banks, for example, and ranks each battery bank according to the amount of voltage change. By setting , abnormal battery banks can be accurately diagnosed and both the short-term and long-term voltage behavior of the battery banks can be analyzed.
- the battery management device 200 of the present invention can secure the safety and reliability of battery energy by early diagnosing battery banks in which electrode tab disconnection and lithium precipitation have occurred using the amount of voltage change in the battery banks.
- the battery management device 200 has the advantage of diagnosing a battery bank in which electrode tab disconnection and lithium precipitation has occurred while the battery is installed in the vehicle, so that separate separation of the battery is not necessary, allowing the battery bank to be diagnosed quickly and easily. .
- Figure 9 is a block diagram showing the hardware configuration of a computing system that implements a method of operating a battery management device according to an embodiment disclosed in this document.
- the computing system 2000 may include an MCU 2100, a memory 2200, an input/output I/F 2300, and a communication I/F 2400. there is.
- the MCU 2100 is a processor that executes various programs stored in the memory 2200, processes various data used in these programs, and performs the functions of the battery management device 200 shown in FIG. 1 described above. It can be.
- the memory 2200 may store various programs related to the operation of the battery management device 200 and operation data of the battery management device 200 for diagnosing the battery bank. A plurality of such memories 2200 may be provided as needed.
- the memory 2200 may be a volatile memory or a non-volatile memory. As volatile memory, the memory 2200 may use RAM, DRAM, SRAM, etc. As a non-volatile memory, the memory 2200 may be ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc.
- the examples of memories 2200 listed above are merely examples and are not limited to these examples.
- the input/output I/F 2300 is an interface that connects input devices such as a keyboard, mouse, and touch panel (not shown) and output devices such as a display (not shown) and the MCU 2100 to transmit and receive data. can be provided.
- the communication I/F 2400 is a component that can transmit and receive various data with a server, and may be various devices that can support wired or wireless communication. For example, through the communication I/F 2400, programs or various data for voltage measurement and abnormality diagnosis can be transmitted and received wired or wirelessly from a separately prepared external server.
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Abstract
Description
Claims (20)
- 복수의 배터리 뱅크 각각의 전압을 측정하는 전압 측정부; 및컨트롤러를 포함하고,상기 컨트롤러는 상기 전압 측정부와 통신 가능하고,상기 복수의 배터리 뱅크 각각의 일정 주기 동안의 전압의 변화량인 제1 값과 상기 복수의 배터리 뱅크 각각의 단위 시간당 전압 변화량의 표준편차인 제2 값을 기초로 상기 복수의 배터리 뱅크 각각의 제1 값을 선택하고,상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 평균값 대비 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 비율을 나타내는 제1 기준값을 기초로 상기 복수의 배터리 뱅크 각각의 순위를 설정하고,특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크에 대해 이상이 있음을 진단하도록 구성되는, 배터리 관리 장치.
- 제1항에 있어서,상기 컨트롤러는 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 제1 값이 상기 적어도 하나의 배터리 뱅크의 제2 값에 하한 임계값을 곱한 값 보다 작은 경우, 상기 제1 값을 배터리 뱅크의 이상 진단에 사용하지 않고 초기화하는 것을 특징으로 하는 배터리 관리 장치.
- 제2항에 있어서,상기 컨트롤러는 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 제1 값이 상기 적어도 하나의 배터리 뱅크의 제2 값에 상한 임계값을 곱한 값을 초과하는 경우, 상기 제1 값을 선택하여 배터리 뱅크의 이상 진단에 사용하는 것을 특징으로 하는 배터리 관리 장치.
- 제3항에 있어서,상기 컨트롤러는 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 제1 값이 상기 적어도 하나의 배터리 뱅크의 제2 값에 하한 임계값을 곱한 값 이상이고, 상기 제2 값에 상한 임계값을 곱한 값 이하인 경우, 상기 적어도 하나의 배터리 뱅크의 상기 제1 값을 누적하여 배터리 뱅크의 이상을 진단하는 것을 특징으로 하는 배터리 관리 장치.
- 제4항에 있어서,상기 컨트롤러는 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 평균값과 상기 복수의 배터리 뱅크 각각의 제2 값에 상한 임계값을 곱한 값 중 최대값 대비 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 비율을 상기 복수의 배터리 뱅크 각각의 제1 기준값으로 산출하는 것을 특징으로 하는 배터리 관리 장치.
- 제5항에 있어서,상기 컨트롤러는 상기 복수의 배터리 뱅크를 상기 제1 기준값이 높은 순서로 나열한 순서에 따라 순위를 설정하고, 상기 복수의 배터리 뱅크 중 1순위인 제1 배터리 뱅크, 2순위인 제2 배터리 뱅크 및 마지막 순위인 제3 배터리 뱅크를 판단하는 것을 특징으로 하는 배터리 관리 장치.
- 제6항에 있어서,상기 컨트롤러는 상기 제1 배터리 뱅크의 제1 기준값과 상기 제2 배터리 뱅크의 제1 기준값의 차이인 제1 편차를 산출하고,상기 제2 배터리 뱅크의 제1 기준값과 상기 제3 배터리 뱅크의 제1 기준값의 차이인 제2 편차를 산출하고,상기 제2 편차 대비 상기 제1 편차의 비율인 제2 기준값에 기초하여 상기 특정 시점에 있어서 상기 제1 배터리 뱅크의 이상 유무를 진단하는 것을 특징으로 하는 배터리 관리 장치.
- 제7항에 있어서,상기 컨트롤러는 상기 제1 배터리 뱅크의 제1 기준값이 제1 임계값을 초과하고, 상기 제1 배터리 뱅크의 제2 기준값이 제2 임계값을 초과하는 경우, 상기 제1 배터리 뱅크를 이상이 있는 배터리 뱅크로 진단하는 것을 특징으로 하는 배터리 관리 장치.
- 복수의 배터리 뱅크 각각의 전압을 측정하는 단계;상기 복수의 배터리 뱅크 각각의 일정 주기 동안의 전압의 변화량인 제1 값을 산출하는 단계;상기 복수의 배터리 뱅크 각각의 단위 시간당 전압 변화량의 표준편차인 제2 값을 산출하는 단계;상기 복수의 배터리 뱅크 각각의 제1 값과 제2 값을 기초로 상기 복수의 배터리 뱅크 각각의 제1 값을 선택하는 단계;상기 복수의 배터리 뱅크들의 선택된 제1 값의 평균값 대비 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 비율인 제1 기준값을 기초로 상기 복수의 배터리 뱅크 각각의 순위를 설정하는 단계; 및상기 특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크에 대해 이상이 있음을 진단하는 단계를 포함하는 배터리 관리 장치의 동작 방법.
- 제9항에 있어서,상기 미리 정해진 시간 간격으로 산출된 제1 값과 제2 값을 비교하여 상기 복수의 배터리 뱅크 각각의 제1 값을 선택하는 단계는상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 제1 값이 상기 적어도 하나의 배터리 뱅크의 제2 값에 하한 임계값을 곱한 값 보다 작은 경우, 상기 제1 값을 배터리 뱅크의 이상 진단에 사용하지 않고 초기화하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제10항에 있어서,상기 복수의 배터리 뱅크 각각의 제1 값과 제2 값을 기초로 상기 복수의 배터리 뱅크 각각의 제1 값을 선택하는 단계는상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 제1 값이 상기 적어도 하나의 배터리 뱅크의 제2 값에 상한 임계값을 곱한 값을 초과하는 경우 상기 제1 값을 유지하여 배터리 뱅크의 이상 진단에 사용하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제11항에 있어서,상기 복수의 배터리 뱅크 각각의 제1 값과 제2 값을 기초로 상기 복수의 배터리 뱅크 각각의 제1 값을 선택하는 단계는상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 상기 제1 값이 상기 적어도 하나의 배터리 뱅크의 제2 값에 하한 임계값을 곱한 값 이상이고, 상기 제2 값에 상한 임계값을 곱한 값 이하인 경우, 상기 제1 값을 누적하여 배터리 뱅크의 이상을 진단하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제12항에 있어서,상기 복수의 배터리 뱅크 각각의 선택(보정)된 제1 값의 평균값 대비 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 비율인 제1 기준값을 기초로 상기 복수의 배터리 뱅크 각각의 순위를 설정하는 단계는상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 평균값과 상기 복수의 배터리 뱅크 각각의 제2 값에 상한 임계값을 곱한 값 중 최대값 대비 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 비율을 상기 복수의 배터리 뱅크 각각의 제1 기준값으로 산출하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제13항에 있어서,상기 복수의 배터리 뱅크들의 선택(보정)된 제1 값의 평균값 대비 상기 복수의 배터리 뱅크 각각의 선택(보정)된 제1 값의 비율인 제1 기준값을 기초로 상기 복수의 배터리 뱅크 각각의 순위를 설정하는 단계는상기 복수의 배터리 뱅크를 제1 기준값이 높은 순서로 나열한 순서에 따라 순위를 설정하고, 상기 복수의 배터리 뱅크 중 1순위인 제1 배터리 뱅크, 2순위인 제2 배터리 뱅크, 및 마지막 순위인 제3 배터리 뱅크를 판단하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제14항에 있어서,상기 특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 이상 유무를 진단하는 단계는상기 제1 배터리 뱅크의 제1 기준값과 상기 제2 배터리 뱅크의 제1 기준값의 차이인 제1 편차를 산출하고,상기 제2 배터리 뱅크의 제1 기준값과 상기 제3 배터리 뱅크의 제1 기준값의 차이인 제2 편차를 산출하고,상기 제2 편차 대비 상기 제1 편차의 비율인 제2 기준값에 기초하여 상기 특정 시점에서의 상기 제1 배터리 뱅크의 이상 유무를 진단하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 제15항에 있어서,상기 특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크를 진단하는 단계는상기 제1 배터리 뱅크의 제1 기준값이 제1 임계값 초과이고, 상기 제1 배터리 뱅크의 제2 기준값이 제2 임계값 초과인 경우, 상기 제1 배터리 뱅크를 이상이 있는 배터리 뱅크로 진단하는 것을 특징으로 하는 배터리 관리 장치의 동작 방법.
- 메모리와상기 메모리에 결합되고, 제9 항에 기재된 동작 방법을 실행하도록 구성되는 처리부를 포함하는 컨트롤러.
- 복수의 배터리 뱅크 각각의 전압을 측정하는 단계;상기 복수의 배터리 뱅크 각각의 일정 주기 동안의 전압의 변화량인 제1 값을 산출하는 단계;상기 복수의 배터리 뱅크 각각의 단위 시간당 전압 변화량의 표준편차인 제2 값을 산출하는 단계;상기 복수의 배터리 뱅크 각각의 제1 값과 제2 값을 기초로 상기 복수의 배터리 뱅크 각각의 제1 값을 선택하는 단계;상기 복수의 배터리 뱅크들의 선택된 제1 값의 평균값 대비 상기 복수의 배터리 뱅크 각각의 선택된 제1 값의 비율값인 제1 기준값을 기초로 상기 복수의 배터리 뱅크 각각의 순위를 설정하는 단계; 및상기 특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크에 대해 이상이 있음을 진단하는 단계를 실행하기 위한 프로그램이 저장된 비일시적 컴퓨터 판독 가능한 저장 매체.
- 제18항에 있어서,상기 특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 이상유무를 진단하는 단계는상기 제1 배터리 뱅크의 제1 기준값과 상기 제2 배터리 뱅크의 제1 기준값의 차이인 제1 편차를 산출하고,상기 제2 배터리 뱅크의 제1 기준값과 상기 제3 배터리 뱅크의 제1 기준값의 차이인 제2 편차를 산출하고,상기 제2 편차 대비 상기 제1 편차의 비율인 제2 기준값에 기초하여 상기 특정 시점에서의 상기 제1 배터리 뱅크의 이상 유무를 진단하는 것을 특징으로 하는 비일시적 컴퓨터 판독 가능한 저장 매체.
- 제19 항에 있어서,상기 특정 시점에 있어서의 복수의 배터리 뱅크 각각의 순위에 기초하여 상기 복수의 배터리 뱅크 중 적어도 하나의 배터리 뱅크의 이상유무를 진단하는 단계는상기 제1 배터리 뱅크의 제1 기준값이 제1 임계값 초과이고, 상기 제1 배터리 뱅크의 제2 기준값이 제2 임계값 초과인 경우, 상기 제1 배터리 뱅크를 이상이 있는 배터리 뱅크로 진단하는 것을 특징으로 하는 비일시적 컴퓨터 판독 가능한 저장 매체.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2025534296A JP2025540369A (ja) | 2022-12-22 | 2023-12-12 | 電池管理装置およびその動作方法 |
| CN202380088100.1A CN120418674A (zh) | 2022-12-22 | 2023-12-12 | 电池管理装置及其操作方法 |
| EP23907555.9A EP4621428A4 (en) | 2022-12-22 | 2023-12-12 | BATTERY MANAGEMENT DEVICE AND ITS OPERATING PROCESS |
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| KR20220182381 | 2022-12-22 | ||
| KR10-2022-0182381 | 2022-12-22 | ||
| KR1020230047829A KR20240100195A (ko) | 2022-12-22 | 2023-04-11 | 배터리 관리 장치 및 그것의 동작 방법 |
| KR10-2023-0047829 | 2023-04-11 | ||
| KR1020230172718A KR20240100239A (ko) | 2022-12-22 | 2023-12-01 | 배터리 관리 장치 및 그것의 동작 방법 |
| KR10-2023-0172718 | 2023-12-01 |
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| EP (1) | EP4621428A4 (ko) |
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| CN115461634B (zh) * | 2020-11-27 | 2025-10-28 | 株式会社Lg新能源 | 电池诊断装置、电池诊断方法、电池组及车辆 |
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- 2023-12-12 WO PCT/KR2023/020464 patent/WO2024136269A1/ko not_active Ceased
- 2023-12-12 JP JP2025534296A patent/JP2025540369A/ja active Pending
- 2023-12-12 CN CN202380088100.1A patent/CN120418674A/zh active Pending
- 2023-12-12 EP EP23907555.9A patent/EP4621428A4/en active Pending
- 2023-12-14 US US18/539,844 patent/US20240213553A1/en active Pending
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Also Published As
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| EP4621428A1 (en) | 2025-09-24 |
| CN120418674A (zh) | 2025-08-01 |
| EP4621428A4 (en) | 2026-03-11 |
| US20240213553A1 (en) | 2024-06-27 |
| JP2025540369A (ja) | 2025-12-11 |
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