WO2024232510A1 - 배터리 관리 장치 및 그것의 동작 방법 - Google Patents
배터리 관리 장치 및 그것의 동작 방법 Download PDFInfo
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- WO2024232510A1 WO2024232510A1 PCT/KR2024/001613 KR2024001613W WO2024232510A1 WO 2024232510 A1 WO2024232510 A1 WO 2024232510A1 KR 2024001613 W KR2024001613 W KR 2024001613W WO 2024232510 A1 WO2024232510 A1 WO 2024232510A1
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- battery cells
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/003—Measuring mean values of current or voltage during a given time interval
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/30—Measuring the maximum or the minimum value of current or voltage reached in a time interval
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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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
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
- H02J7/84—Control of state of health [SOH]
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
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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
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- Embodiments disclosed in this document relate to a battery management device and a method of operating the same.
- Electric vehicles receive electricity from the outside to charge battery cells, and then drive a motor with the voltage charged in the battery cells to obtain power.
- Battery cells undergo internal deformation and transformation through various charging and discharging during the production and use stages, and their physical and chemical properties change, which can cause internal short circuits, external short circuits, venting due to lithium deposition, or undervoltage defects in which the voltage of the battery cell decreases below a certain level.
- a defect occurs inside a battery cell, the performance of the battery cell may deteriorate, and direct problems may occur in the battery cell, such as an increased risk of ignition due to electrolyte leakage. Therefore, a technology to determine whether a battery cell is abnormal is required.
- One purpose of the embodiments disclosed in this document is to provide a battery management device and an operating method thereof capable of accurately diagnosing an abnormal battery cell by removing noise of deviations between a long-term moving average value and a short-term moving average value of a battery cell's voltage.
- one purpose of the embodiments disclosed in this document is to provide a battery management device and an operating method thereof capable of preventing over-detection due to a voltage inflection point (an inflection point of open circuit voltage) in the process of detecting abnormal voltage behavior.
- a battery management device may include a voltage measuring unit which measures the voltage of each of a plurality of battery cells, and a controller which calculates a first deviation which is a deviation between a long-term moving average value and a short-term moving average value of battery cell voltages for each of the plurality of battery cells, calculates a second deviation which is a deviation between the long-term moving average value and the short-term moving average value of average voltages of the plurality of battery cells, calculates a first diagnostic deviation which is a difference between the first deviation and the second deviation for each of the plurality of battery cells, diagnoses at least one battery cell among the plurality of battery cells based on the first diagnostic deviation of each of the plurality of battery cells to set a diagnostic battery cell, and compares the first diagnostic deviation of a battery cell having a maximum value among first diagnostic deviations of battery cells different from the diagnostic battery cell with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell has been diagnosed normally.
- the controller may determine that the diagnostic battery cell is diagnosed normally if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by the set value exceeds the first diagnostic deviation of the battery cell having the maximum value, and may determine that the diagnostic battery cell is diagnosed incorrectly if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by the set value is less than or equal to the first diagnostic deviation of the battery cell having the maximum value.
- the controller may calculate a first diagnostic deviation of each of the plurality of battery cells at each reference time, and update a first diagnostic deviation of a battery cell having a maximum value among the first diagnostic deviations of battery cells different from the diagnostic battery cell at each reference time.
- the controller can calculate a first diagnostic deviation of the diagnostic battery cell at each reference time, and update a maximum value of the first diagnostic deviation of the diagnostic battery cell at each reference time.
- the controller may determine that the diagnostic battery cell is diagnosed normally if a minimum value among the voltages of the plurality of battery cells is higher than a voltage at the time of diagnosis of the diagnostic battery cell and the diagnosis of the diagnostic battery cell is not determined to be a misdiagnosis.
- the controller can update a maximum value of a first diagnostic deviation of a battery cell different from the diagnostic battery cell at each reference time, and compare the updated maximum value with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell has been diagnosed normally.
- the controller calculates a second diagnostic deviation of each of the plurality of battery cells based on a reference value obtained by multiplying the second deviation among the first diagnostic deviations of each of the plurality of battery cells by a critical constant, and diagnoses at least one battery cell among the plurality of battery cells based on the second diagnostic deviation of each of the plurality of battery cells to set the diagnostic battery cell.
- the controller sets a maximum value among a value obtained by multiplying the second deviation by a first threshold constant and the second threshold constant as the reference value, calculates a second diagnostic deviation of each of the plurality of battery cells by excluding a first diagnostic deviation less than or equal to the reference value among the first diagnostic deviations of each of the plurality of battery cells, normalizes the second diagnostic deviation of each of the plurality of battery cells by a value obtained by multiplying the second deviation by a third threshold constant and a maximum value among the fourth threshold constants, calculates a third diagnostic deviation of each of the plurality of battery cells by normalizing the same, calculates a value obtained by adding a minimum value of the third diagnostic deviation of each of the plurality of battery cells to the third diagnostic deviation of each of the plurality of battery cells and dividing the value by the third diagnostic deviation, calculates a bias of each of the plurality of battery cells, calculates a fourth diagnostic deviation of each of the plurality of battery cells by multiplying the third diagnostic deviation of each of the plurality of battery cells by the bias,
- An operating method of a battery management device may include an operation of measuring the voltage of each of a plurality of battery cells, an operation of calculating a first deviation, which is a deviation between a long-term moving average value and a short-term moving average value of battery cell voltages, for each of the plurality of battery cells, an operation of calculating a second deviation, which is a deviation between the long-term moving average value and the short-term moving average value of average voltages of the plurality of battery cells, and an operation of calculating a first diagnostic deviation, which is a difference between the first deviation and the second deviation, for each of the plurality of battery cells, an operation of diagnosing at least one battery cell among the plurality of battery cells based on the first diagnostic deviation of each of the plurality of battery cells to set a diagnostic battery cell, and an operation of comparing the first diagnostic deviation of a battery cell having a maximum value among first diagnostic deviations of battery cells different from the diagnostic battery cell with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic
- the operation of comparing the first diagnostic deviation of a battery cell having a maximum value among first diagnostic deviations of battery cells different from the diagnostic battery cell and the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell has been diagnosed normally may include determining that the diagnostic battery cell has been diagnosed normally if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by a set value exceeds the first diagnostic deviation of the battery cell having the maximum value, and determining that the diagnostic battery cell has been misdiagnosed if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by a set value is equal to or less than the first diagnostic deviation of the battery cell having the maximum value.
- the method may further include calculating a first diagnostic deviation of each of the plurality of battery cells at each reference time, and updating a first diagnostic deviation of a battery cell having a maximum value among first diagnostic deviations of battery cells different from the diagnostic battery cell at each reference time.
- the method may further include calculating a first diagnostic deviation of the diagnostic battery cell at each reference time and updating a maximum value of the first diagnostic deviation of the diagnostic battery cell at each reference time.
- the operation of comparing the first diagnostic deviation of a battery cell having a maximum value among the first diagnostic deviations of battery cells different from the diagnostic battery cell and the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell has been diagnosed normally may include the operation of updating the maximum value among the first diagnostic deviations of battery cells different from the diagnostic battery cell at each reference time, and the operation of comparing the first diagnostic deviation of the diagnostic battery cell with the updated maximum value to determine whether the diagnostic battery cell has been diagnosed normally.
- the operation of diagnosing at least one battery cell among the plurality of battery cells and setting the diagnostic battery cell based on the first diagnostic deviation of each of the plurality of battery cells may include the operation of calculating a second diagnostic deviation of each of the plurality of battery cells based on a reference value obtained by multiplying the second deviation of the first diagnostic deviations of each of the plurality of battery cells by a threshold constant, and the operation of diagnosing at least one battery cell among the plurality of battery cells and setting the diagnostic battery cell based on the second diagnostic deviation of each of the plurality of battery cells.
- the operation of diagnosing at least one battery cell among the plurality of battery cells based on the second diagnostic deviation of each of the plurality of battery cells and setting the diagnostic battery cell comprises: an operation of setting a maximum value between a value obtained by multiplying the second deviation by a first threshold constant and the second threshold constant as the reference value; an operation of calculating the second diagnostic deviation of each of the plurality of battery cells by excluding a first diagnostic deviation less than or equal to the reference value among the first diagnostic deviations of each of the plurality of battery cells; an operation of normalizing the second diagnostic deviation of each of the plurality of battery cells by a value obtained by multiplying the second deviation by a third threshold constant and the maximum value between a fourth threshold constant to calculate a third diagnostic deviation of each of the plurality of battery cells; an operation of calculating a bias of each of the plurality of battery cells by dividing a value obtained by adding a minimum value of the third diagnostic deviation of each of the plurality of battery cells to the third diagnostic deviation of each of the plurality of battery cells by the third diagnostic deviation
- a battery management device and its operating method can accurately diagnose an abnormal battery cell by removing noise of deviations between a long-term moving average value and a short-term moving average value of voltage of a battery cell.
- the battery management device and its operating method according to one embodiment disclosed in the present document can prevent over-detection based on voltage inflection points of a plurality of battery cells, detect minute signals by lowering thresholds, and filter out noise to increase detection rates and reduce over-detection rates.
- the battery management device and its operating method according to one embodiment disclosed in this document can prevent over-inspection and increase the diagnosis rate by distinguishing between a voltage inflection point that commonly appears depending on the characteristics of a cell and a voltage inflection point due to a defect.
- FIG. 1 is a drawing showing a battery cell pack according to one embodiment disclosed in this document.
- FIG. 2 is a block diagram showing the configuration of a battery management device according to one embodiment disclosed in this document.
- FIG. 3 is a graph showing the voltage of a battery cell according to one embodiment disclosed in this document.
- FIG. 4 is a flowchart showing a method for diagnosing a battery cell of a controller according to one embodiment disclosed in this document.
- FIG. 5a is a graph showing a first diagnostic deviation of a battery cell according to one embodiment disclosed in the present document.
- FIG. 5b is a graph showing a third diagnostic deviation of a battery cell according to one embodiment disclosed in the present document.
- FIG. 5c is a graph showing the bias of a third diagnostic deviation of a battery cell according to one embodiment disclosed in the present document.
- FIG. 5d is a graph showing a fourth diagnostic deviation of a battery cell according to one embodiment disclosed in the present document.
- FIG. 6 is a flowchart illustrating a battery management device according to another embodiment disclosed in this document.
- FIG. 7 is a drawing for explaining the difference in voltage inflection points between multiple battery cells according to another embodiment disclosed in this document.
- FIGS. 8A and 8B are diagrams for explaining the difference in the first diagnostic deviation according to the difference in the voltage inflection point of the battery cell according to another embodiment disclosed in the present document.
- FIGS. 9 and 10 are drawings for explaining a method for detecting a misdiagnosis of a battery management device according to another embodiment disclosed in this document.
- FIG. 11 is a drawing for explaining an operation method of a battery management device according to another embodiment disclosed in this document.
- FIG. 12 is a drawing specifically explaining an operation method of a battery management device according to another embodiment disclosed in this document.
- FIG. 13 is a block diagram showing the hardware configuration of a computing system that implements an operating method of a battery management device according to one embodiment disclosed in this document.
- FIG. 1 is a drawing showing a battery cell pack according to one embodiment disclosed in this document.
- a battery cell pack (1000) may include a battery cell module (100), a battery management device (200), and a relay (300).
- the battery cell module (100) may be a battery cell, and in this case, the battery cell pack (1000) may have a cell to pack structure.
- a single battery cell module (100) is illustrated, but depending on the embodiment, the battery cell module (100) may be configured with a plurality of battery cell modules, and the battery cell pack (1000) may have a stacked structure of a plurality of battery cell modules.
- the battery cell module (100) may include a plurality of battery cells (110, 120, 130, 140).
- the plurality of battery cells is illustrated as being four, but this is not limited thereto, and the battery cell module (100) may be configured to include n (n is a natural number greater than or equal to 2) battery cells.
- the battery cell module (100) can supply power to a target device (not shown).
- the battery cell module (100) can be electrically connected to the target device.
- the target device can include an electrical, electronic, or mechanical device that operates by receiving power from a battery cell pack (1000) including a plurality of battery cells (110, 120, 130, 140), and for example, the target device can be, but is not limited to, an electric vehicle (EV) or an energy storage system (ESS).
- EV electric vehicle
- ESS energy storage system
- a plurality of battery cells (110, 120, 130, 140) are basic units of battery cells that can be used by charging and discharging electric energy, and may be, but are not limited to, lithium-ion (Li-ion) batteries, lithium-ion polymer (Li-ion polymer) batteries, nickel-cadmium (Ni-Cd) batteries, nickel-metal hydride (Ni-MH) batteries, etc. Meanwhile, in FIG. 1, a single battery cell module (100) is illustrated, but depending on the embodiment, the battery cell module (100) may be configured in multiples.
- a battery management system (BMS) (200) can manage and/or control the status and/or operation of a battery cell module (100).
- the battery management device (200) can manage and/or control the status and/or operation of a plurality of battery cells (110, 120, 130, 140) included in the battery cell module (100).
- the battery management device (200) can manage charging and/or discharging of the battery cell module (100).
- the battery management device (200) can control the operation of the relay (300). For example, the battery management device (200) can short-circuit the relay (300) to supply power to the target device. Additionally, the battery management device (200) can short-circuit the relay (300) when a charging device is connected to the battery cell pack (1000).
- the battery management device (200) can monitor the voltage, current, temperature, etc. of the battery cell module (100) and/or each of the plurality of battery cells (110, 120, 130, 140) included in the battery cell module (100).
- sensors or various measurement modules not shown may be additionally installed at any location of the battery cell module (100), the charging/discharging path, or the battery cell module (100).
- the battery management device (200) can calculate parameters indicating the state of the battery cell module (100), for example, SOC (State of Charge) or SOH (State of Health), based on the measured values of the monitored voltage, current, temperature, etc.
- the battery management device (200) may diagnose abnormal phenomena inside the plurality of battery cells (110, 120, 130, 140) based on data of various factors that change as the battery cells deteriorate.
- Battery cells may experience faster and greater voltage changes than normal battery cells when they are defective due to various causes, such as defects during the production stage, internal deformation and transformation through multiple charging and discharging, or external impact.
- the battery management device (200) utilizes the phenomenon that battery cells with internal defects experience faster and greater voltage changes than normal battery cells during the idle period, and compares voltage data of the idle periods of each of a plurality of battery cells (110, 120, 130, 140) with statistical normal voltage data of the idle periods of normal battery cells, thereby diagnosing abnormal battery cells among the plurality of battery cells (110, 120, 130, 140).
- the battery management device (200) can determine whether an abnormal battery cell exists among a plurality of battery cells (110, 120, 130, 140) by utilizing the characteristics of a large deviation and a large bias of an abnormal battery cell compared to a normal battery cell.
- the battery management device (200) can determine whether an abnormal battery cell exists based on voltage deviations of a plurality of battery cells (110, 120, 130, 140) during charging. In this case, the battery management device (200) can determine whether an abnormal battery cell exists by comprehensively considering voltage deviations of a plurality of battery cells (110, 120, 130, 140) and whether a voltage inflection point has been passed, and can determine a misdiagnosis if a battery cell that has been incorrectly diagnosed as passing a voltage inflection point exists.
- the battery management device (200) can calculate an average value of voltages of a plurality of battery cells (110, 120, 130, 140) and a voltage deviation (dV) of each of the plurality of battery cells (110, 120, 130, 140).
- the battery management device (200) can use the voltage deviation of each of the plurality of battery cells (110, 120, 130, 140) to determine an abnormal voltage behavior of at least one battery cell among the plurality of battery cells (110, 120, 130, 140) and diagnose the corresponding battery cell.
- the battery management device (200) can diagnose the battery cell by using the voltage deviation data of each of the plurality of battery cells (110, 120, 130, 140) excluding noise voltage data suspected of being noise data from among the voltage deviations of each of the plurality of battery cells (110, 120, 130, 140).
- the battery management device (200) can amplify the voltage deviation data of each of the plurality of battery cells (110, 120, 130, 140) after excluding the noise voltage data from among the voltage deviations of each of the plurality of battery cells (110, 120, 130, 140).
- the battery management device (200) can diagnose an abnormal battery cell suspected of having an abnormal voltage by using the amplified voltage deviation data of each of the plurality of battery cells (110, 120, 130, 140).
- the operation of the battery management device (200) below can be performed in various devices such as a server, cloud, charger, or charger/discharger connected to the battery management device (200) or a vehicle equipped with the battery management device (200).
- FIG. 2 is a block diagram showing the configuration of a battery management device according to one embodiment disclosed in this document.
- the battery management device (200) may include a voltage measurement unit (210) and a controller (220).
- the voltage measuring unit (210) can calculate the voltage of each of the plurality of battery cells (110, 120, 130, 140).
- the voltage measuring unit (210) can calculate the voltage of each of the plurality of battery cells (110, 120, 130, 140) per unit time to calculate time-series data of the voltage of each of the plurality of battery cells (110, 120, 130, 140).
- the voltage measuring unit (210) can continuously calculate voltage rise and fall data during charging, a rest period after charging, a rest period after discharging, and a rest period after discharging, and long-term stabilization (Relaxation) data of the plurality of battery cells (110, 120, 130, 140).
- FIG. 3 is a graph showing the voltage of a battery cell according to one embodiment disclosed in this document.
- the voltage measurement unit (210) can measure the voltages of the plurality of battery cells (110, 120, 130, 140) during charging, a rest period after charging, a discharge period, and a rest period after discharging, and can produce time series data of the voltages of each of the plurality of battery cells (110, 120, 130, 140).
- the voltage measurement unit (210) can measure the voltages of each of the plurality of battery cells (110, 120, 130, 140) per unit time and generate a graph representing the voltage change of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can calculate the moving average of the voltage of each of the plurality of battery cells (110, 120, 130, 140).
- the moving average is an average of some data extracted while moving a window of a specific size (Size) among the entire data.
- the window is a reference section from which some of the entire data can be extracted to determine data to be used.
- the start point of the window is a point in time before the reference time from the present point in time, and the end point of the window is the present point in time. For example, if the window is one week, the controller (220) can extract data acquired during the last one week from the present point in time from the entire data.
- the controller (220) can calculate a moving average value of the voltage of each of the plurality of battery cells (110, 120, 130, 140) by using voltage data extracted while moving a window among the total voltage data of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can calculate a continuous moving average value of the voltage of each of the plurality of battery cells (110, 120, 130, 140) by using voltage data continuously extracted while moving a window among the total voltage data of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) may apply one of a simple moving average, a weighted moving average, or an exponential moving average (EMA) to the overall voltage data of each of the plurality of battery cells (110, 120, 130, 140) to calculate a moving average value of the voltage of each of the plurality of battery cells (110, 120, 130, 140).
- a simple moving average a weighted moving average
- EMA exponential moving average
- the controller (220) may apply an exponential moving average (EMA) to the total voltage data of each of the plurality of battery cells (110, 120, 130, 140) to calculate an exponential moving average of the voltages of each of the plurality of battery cells (110, 120, 130, 140).
- EMA exponential moving average
- the exponential moving average is a type of weighted moving average method that uses data from all past periods while giving a higher weight to recent data.
- the controller (220) may calculate a plurality of moving averages having different window sizes using voltage data of each of the plurality of battery cells (110, 120, 130, 140). According to one embodiment, the controller (220) may calculate a long-term moving average having a relatively long window length (Long) and a short-term moving average having a relatively short window length (Short) using total voltage data of each of the plurality of battery cells (110, 120, 130, 140).
- the window size of the long-term moving average may include 100 seconds
- the window size of the short-term moving average may include 10 seconds.
- the controller (220) may calculate a long-term moving average value of each of the plurality of battery cells (110, 120, 130, 140) using voltage data acquired over the past 100 seconds from the time of calculation using voltage data of each of the plurality of battery cells (110, 120, 130, 140), and may calculate a short-term moving average value of each of the plurality of battery cells (110, 120, 130, 140) using voltage data acquired over the past 10 seconds from the time of calculation.
- the controller (220) can analyze the long-term voltage change trend (Trend) and the short-term voltage change trend of each of the plurality of battery cells (110, 120, 130, 140) by using the continuous long-term moving average value (V_LMA) and the short-term moving average value (V_SMA) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can diagnose whether the voltage of each of the plurality of battery cells is abnormal by using the long-term moving average value (V_LMA) and the short-term moving average value (V_SMA) of the voltage of each of the plurality of battery cells (110, 120, 130, 140).
- FIG. 4 is a flowchart showing a method for diagnosing a battery cell of a controller according to one embodiment disclosed in this document.
- the controller (220) can calculate a plurality of first deviations (V_LMA - V_SMA), which are deviations of a long-term moving average value (V_LMA) and a short-term moving average value (V_SMA) of voltages of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can continuously calculate the first deviations (V_LMA - V_SMA) of each of the plurality of battery cells (110, 120, 130, 140) calculated for a unit time.
- the controller (220) can continuously calculate deviations of long-term behavior and short-term behavior of voltages of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) calculates a long-term moving average of the average voltage (V_avg) of multiple battery cells (110, 120, 130, 140). and short term moving average can be produced.
- the average voltage (V_avg) of the plurality of battery cells (110, 120, 130, 140) may include the average value (Mean) or median value (Median) of the voltages of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) continuously calculates the average voltage (V_avg) of the plurality of battery cells (110, 120, 130, 140) per unit time, and uses the average voltage (V_avg) of the plurality of battery cells (110, 120, 130, 140) to obtain a long-term moving average value of the average voltage (V_avg) of the plurality of battery cells (110, 120, 130, 140). and short term moving average can be calculated.
- the size of the window may be the same as the size of the window of the long-term moving average value (V_LMA) of the voltage of each of the plurality of battery cells (110, 120, 130, 140).
- the size of the window may be equal to the size of the window of the short-term moving average (V_SMA) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) calculates a long-term moving average of the average voltage (V_avg) of multiple battery cells (110, 120, 130, 140). and short term moving average The second deviation is the deviation of
- the controller (220) can calculate the second deviation of a plurality of battery cells (110, 120, 130, 140) per unit time. can be continuously produced. That is, the controller (220) can produce the deviation between the long-term behavior and the short-term behavior of the average voltage (V_avg) of multiple battery cells (110, 120, 130, 140).
- the controller (220) detects a plurality of first deviations (V_LMA - V_SMA) and second deviations
- the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140) can be calculated.
- the controller (220) can calculate the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140) based on [Mathematical Formula 1].
- the controller (220) has a plurality of first deviations (V_LMA - V_SMA) and second deviations
- the deviation can be calculated as the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140).
- FIG. 5a is a graph showing a first diagnostic deviation of a battery cell according to one embodiment disclosed in the present document.
- the controller (220) can continuously calculate the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140) per unit time, and generate a graph showing the change in the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) calculates a first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140) and compares the deviation of the long-term behavior and short-term behavior of the voltage of each of the plurality of battery cells (110, 120, 130, 140) with the deviation of the long-term behavior and short-term behavior of the average voltage (V_avg) of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can remove noise data from the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140) to calculate the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can set a reference value for determining whether the first diagnostic deviation (D1) of each of the plurality of battery cells (110, 120, 130, 140) is noise based on [Mathematical Formula 2] below.
- the controller (220) detects the second deviation The value obtained by multiplying the absolute value of by the first critical constant (C1)
- the maximum value (Max) of the first and second critical constants (C1 and C2) can be set as a reference value for each of the plurality of battery cells (110, 120, 130, and 140).
- the first critical constant (C1) can include '0.1'
- the second critical constant (C2) can include '0.4'.
- the first critical constant (C1) and the second critical constant (C2) can be changed according to the size and characteristics of the voltage data of each of the plurality of battery cells (110, 120, 130, and 140).
- the controller (220) may determine a first diagnostic deviation (D1) lower than a reference value among the first diagnostic deviations (D1) of each of the plurality of battery cells (110, 120, 130, 140) as noise data.
- the controller (220) may calculate a second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) by excluding the first diagnostic deviation (D1) lower than a reference value among the first diagnostic deviations (D1) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can normalize the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) to produce a third diagnostic deviation (D3).
- the controller (220) can normalize the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) based on [Mathematical Formula 3] below to calculate the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) determines the absolute value of the second deviation The value obtained by multiplying the third critical constant (C3)
- the controller (220) can calculate the maximum value (Max) among the third critical constant (C4) and the fourth critical constant (C4).
- the controller (220) calculates the value obtained by multiplying the absolute value of the second deviation by the third critical constant and the maximum value among the fourth critical constant (C4).
- the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) can be normalized using the third critical constant (C3) and the fourth critical constant (C4).
- the third critical constant (C3) can include '0.1' and the fourth critical constant (C4) can include '0.1', and the third critical constant (C3) and the fourth critical constant (C4) can be changed according to the size and characteristics of the voltage data of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) determines the second diagnostic deviation (D2) representing the behavior of the average voltage (V_avg) of the plurality of battery cells (110, 120, 130, 140). Using this, the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) can be normalized to produce a third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) may normalize the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) through a logarithmic operation. That is, the controller (220) may calculate the normalized value of the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) through a logarithmic operation as the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) may set the average value (D2_avg) of the second diagnostic deviations (D2) of each of the plurality of battery cells (110, 120, 130, 140) as a normalization reference value.
- the controller (220) may use the average value (D2_avg) of the second diagnostic deviations as a normalization reference value, and normalize the second diagnostic deviations (D2) of each of the plurality of battery cells (110, 120, 130, 140) by dividing the average value (D2_avg) of the second diagnostic deviations (D2).
- the controller (220) can calculate the normalized value by dividing the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) by the average value (D2_avg) of the second diagnostic deviations as the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- FIG. 5b is a graph showing a third diagnostic deviation (D3) of a battery cell according to one embodiment disclosed in the present document.
- the controller (220) may normalize the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) according to various embodiments to calculate the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can continuously calculate the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140) per unit time, and generate a graph showing the change in the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) may be configured to generate a second deviation that represents the behavior of the average voltage (V_avg) of a plurality of battery cells (110, 120, 130, 140).
- the second diagnostic deviation (D2) of each of the plurality of battery cells (110, 120, 130, 140) can be normalized using .
- the controller (220) can calculate the skewness of the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can calculate the skewness of the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140) based on [Mathematical Formula 4] below.
- the controller (220) adds the minimum value (Min[third diagnostic deviation (D3)]) of the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140) to the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140), and divides the obtained value by the third diagnostic deviation (D3) to calculate the deflection of each of the plurality of battery cells (110, 120, 130, 140).
- FIG. 5c is a graph showing the bias of a third diagnostic deviation of a battery cell according to one embodiment disclosed in this document.
- the controller (220) can continuously calculate the deflection of the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140) per unit time, and generate a graph showing the change in the deflection of the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can calculate a fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140) by reflecting the bias in the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140). Specifically, the controller (220) can calculate the fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140) based on [Mathematical Formula 5] below.
- the controller (220) can multiply the third diagnostic deviation (D3) of each of the plurality of battery cells (110, 120, 130, 140) by a bias to calculate the fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140).
- FIG. 5d is a graph showing a fourth diagnostic deviation of a battery cell according to one embodiment disclosed in the present document.
- the controller (220) can continuously calculate the fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140) per unit time, and generate a graph showing the change in the fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140).
- the controller (220) can determine whether the fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140) exceeds a threshold value.
- the threshold value can be defined as a reference value that can be determined as ‘abnormal’ if an extreme result occurs.
- the threshold value can be defined as a criterion that indicates how much data contradicts a specific statistical model.
- the controller (220) can determine that a battery cell among the plurality of battery cells (110, 120, 130, 140) in which the fourth diagnostic deviation (D4) exceeds the threshold value is a battery cell in which an abnormal voltage behavior has occurred.
- the controller (220) can diagnose at least one battery cell among the plurality of battery cells (110, 120, 130, 140) based on whether the fourth diagnostic deviation (D4) of each of the plurality of battery cells (110, 120, 130, 140) exceeds the threshold value. In operation S108, the controller (220) can diagnose at least one battery cell among the plurality of battery cells (110, 120, 130, 140) if the fourth diagnostic deviation (D4) of the corresponding battery cell exceeds the threshold value.
- the controller (220) may increase a diagnostic count value of at least one battery cell when a fourth diagnostic deviation (D4) of at least one battery cell among the plurality of battery cells (110, 120, 130, 140) exceeds a threshold value.
- D4 fourth diagnostic deviation
- the controller (220) can diagnose at least one battery cell if the diagnostic count value of at least one battery cell among the plurality of battery cells (110, 120, 130, 140) is greater than or equal to a threshold count value.
- the controller (220) can diagnose at least one battery cell among a plurality of battery cells (110, 120, 130, 140), and then track and monitor whether there is a defect, such as whether an internal short circuit occurs, whether an external short circuit occurs, or whether lithium is precipitated, within the battery cell.
- the controller (220) determines that an internal defect has occurred in a battery cell as a result of the diagnosis, it can provide information about the corresponding battery cell to the user. For example, the controller (220) can provide information about a battery cell in which an internal short circuit has occurred to a user terminal through a communication unit (not shown), and can also provide information about the corresponding battery cell through a display equipped in a vehicle or charger.
- noise of deviations between long-term moving average values and short-term moving average values of voltages of battery cells can be removed to accurately diagnose abnormal battery cells.
- the battery management device (200) minimizes the distortion of the voltage of the battery cell, removes noise data, and reflects the bias of the voltage of the battery cell to amplify the abnormal voltage behavior of the battery cell, thereby improving the accuracy of the diagnosis.
- the battery management device (200) can diagnose a battery cell in which abnormal voltage behavior has occurred early by using the deviation of the long-term moving average value and the short-term moving average value of the voltage of the battery cell, thereby ensuring the safety and reliability of the battery cell energy.
- the battery management device (200) can diagnose a battery cell in which abnormal voltage behavior has occurred while the battery cell is mounted in a vehicle, thereby making it possible to diagnose the battery cell quickly and easily without the need for separate separation of the battery cell.
- FIG. 6 is a flowchart for explaining a battery management device according to another embodiment disclosed in this document. The operations illustrated in FIG. 6 can be performed through the battery management device (200) of FIG. 2.
- the voltage measuring unit (210) can measure the voltage of each of a plurality of battery cells.
- the controller (220) can calculate a first deviation, which is a deviation between a long-term moving average value and a short-term moving average value of battery cell voltages for each of the plurality of battery cells.
- a first deviation which is a deviation between a long-term moving average value and a short-term moving average value of battery cell voltages for each of the plurality of battery cells.
- operation S202 can be substantially the same as operation S102 of FIG. 4.
- the controller (220) can calculate a second deviation, which is a deviation between a long-term moving average value and a short-term moving average value of the average voltage of a plurality of battery cells.
- a second deviation which is a deviation between a long-term moving average value and a short-term moving average value of the average voltage of a plurality of battery cells.
- operation S203 can be substantially the same as operation S103 of FIG. 4.
- the controller (220) can calculate a first diagnostic deviation, which is a difference between the first deviation and the second deviation, for each of the plurality of battery cells.
- operation S204 can be substantially the same as operation S104 of FIG. 4.
- the controller (220) can diagnose at least one battery cell among the plurality of battery cells based on the first diagnostic deviation of each of the plurality of battery cells to set the diagnostic battery cell. For example, the controller (220) can set a battery cell in which the first diagnostic deviation increases above a predetermined value as the diagnostic battery cell.
- the controller (220) may calculate a second past deviation of each of the plurality of battery cells based on a reference value obtained by multiplying a second deviation among the first diagnostic deviations of each of the plurality of battery cells by a critical constant, and may diagnose at least one battery cell among the plurality of battery cells based on the second diagnostic deviation of each of the plurality of battery cells to set a diagnostic battery cell.
- the controller (220) may set a maximum value among the second threshold constant and a value obtained by multiplying the second deviation by the first threshold constant as a reference value, and may calculate the second diagnostic deviation of each of the plurality of battery cells by excluding a first diagnostic deviation that is lower than the reference value among the first diagnostic deviations of each of the plurality of battery cells.
- the controller (220) may normalize the second diagnostic deviation of each of the plurality of battery cells by dividing the value obtained by multiplying the second deviation by the third threshold constant and the maximum value among the fourth threshold constant, and may calculate the third diagnostic deviation of each of the plurality of battery cells.
- the controller (220) may calculate the bias of each of the plurality of battery cells by dividing the value obtained by adding a minimum value of the third diagnostic deviation of each of the plurality of battery cells to the third diagnostic deviation of each of the plurality of battery cells by the third diagnostic deviation, and may calculate the fourth diagnostic deviation of each of the plurality of battery cells by multiplying the third diagnostic deviation of each of the plurality of battery cells by the bias, and may diagnose at least one battery cell among the plurality of battery cells based on whether the fourth diagnostic deviation of each of the plurality of battery cells exceeds a threshold value to set the diagnostic battery cell.
- the controller (220) can diagnose a plurality of battery cells based on any one of the first diagnostic deviation, the second diagnostic deviation based on the first diagnostic deviation, the third diagnostic deviation, or the fourth diagnostic deviation, and set the diagnostic battery cell.
- the controller (220) may compare the first diagnostic deviation of a battery cell having a maximum value among the first diagnostic deviations of different battery cells from the diagnostic battery cell with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell is diagnosed normally. For example, the controller (220) may determine that the diagnostic battery cell is diagnosed normally if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by a set value exceeds the first diagnostic deviation of the battery cell having the maximum value. For another example, the controller (220) may determine that the diagnostic battery cell is misdiagnosed if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by a set value is less than or equal to the first diagnostic deviation of the battery cell having the maximum value.
- the controller (220) can update the maximum value among the first diagnostic deviations of the battery cells different from the diagnostic battery cell at each reference time. For example, the controller (220) can calculate the first diagnostic deviation of each of the plurality of battery cells at each reference time, and update the first diagnostic deviation of the battery cell having the maximum value among the first diagnostic deviations of the battery cells different from the diagnostic battery cell at each reference time. That is, the controller (220) can update the first diagnostic deviation of the battery cell having the maximum value among the first diagnostic deviations with the maximum value among the previously stored maximum value and the newly calculated first diagnostic deviation.
- the controller (220) may store together with the voltage of the battery cell having the maximum value among the first diagnostic deviations of the battery cells different from the diagnostic battery cell. For example, if the first battery cell is different from the diagnostic battery cell and the first diagnostic deviation of the first battery cell has the maximum value, the controller (220) may store the first diagnostic deviation of the first battery cell and the voltage of the first battery cell in correspondence. In addition, the controller (220) may store further identification information of the first battery cell in correspondence.
- the controller (220) may initialize the stored value when the voltage of the stored first battery cell becomes lower than the voltage of the battery cell having the minimum voltage among the plurality of battery cells. For example, when the voltage of the stored first battery cell becomes lower than the voltage of the battery cell having the minimum voltage among the plurality of battery cells, it means that all the battery cells have passed the voltage inflection point, and therefore, the controller (220) may initialize the stored value at the voltage inflection point and store the maximum value of the new first diagnostic deviation.
- the controller (220) may calculate a first diagnostic deviation of the diagnostic battery cell at each reference time, and update a maximum value of the first diagnostic deviation of the diagnostic battery cell at each reference time. For example, the controller (220) may update a maximum value of the first diagnostic deviation of the diagnostic battery cell at each reference time in order to update a maximum value of the first diagnostic deviation calculated in relation to the diagnostic battery cell. According to an embodiment, the controller (220) may store the maximum value of the first diagnostic deviation of the diagnostic battery cell and the voltage of the diagnostic battery cell at the corresponding time in correspondence. In addition, the controller (220) may further store identification information of the diagnostic battery cell in correspondence.
- the controller (220) may determine that the diagnostic battery cell is diagnosed normally if the minimum value among the voltages of the plurality of battery cells is higher than the voltage at the time of diagnosis of the diagnostic battery cell and the diagnosis of the diagnostic battery cell is not determined to be a misdiagnosis.
- the controller (220) updates the maximum value of the first diagnostic deviation of a different battery cell from the diagnostic battery cell at each reference time, and compares the updated maximum value with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell has been diagnosed normally.
- FIG. 7 is a drawing for explaining the difference in voltage inflection points between multiple battery cells according to another embodiment disclosed in this document.
- multiple battery cells may have different voltages during charging.
- the multiple battery cells may have different times at which they have the same voltage during charging. Accordingly, the times at which each of the multiple battery cells passes the voltage inflection point may be different, and a battery management device (200) that diagnoses based on the deviation may misdiagnose the battery at the time of passing the voltage inflection point.
- FIGS. 8A and 8B are diagrams for explaining the difference in the first diagnostic deviation according to the difference in the voltage inflection point of the battery cell according to another embodiment disclosed in the present document.
- a voltage difference may occur between the battery cell (805) with the highest voltage and the remaining battery cells (810).
- the battery cell (805) having the highest voltage may have a high first diagnostic deviation (815).
- the remaining battery cells (810) may not reach the voltage inflection point and thus may have lower first diagnostic deviations (820). Accordingly, the battery management device (200) diagnosing the battery cells based on the first diagnostic deviation may diagnose that the battery cell (805) having the highest voltage is abnormal.
- the remaining battery cells (810) also have a first diagnostic deviation similar to the high first diagnostic deviation (815) when they pass the voltage inflection point as time passes. That is, the battery management device (200) according to another embodiment disclosed in this document is intended to provide a diagnostic method capable of preventing misdiagnosis due to the voltage inflection point.
- FIGS. 9 and 10 are drawings for explaining a method for detecting a misdiagnosis of a battery management device according to another embodiment disclosed in this document.
- the controller (220) of the battery management device (200) may store the maximum value among the first diagnostic deviations of each of the plurality of battery cells.
- the controller (220) may store the maximum value among the first diagnostic deviations of each of the plurality of battery cells at each reference time.
- the controller (220) may store the maximum value among the first diagnostic deviations of each of the plurality of battery cells alternately in slot 1 and slot 2. That is, when a first diagnostic deviation higher than the values stored in slot 1 and slot 2 is calculated, the controller (220) may update a slot having a lower first diagnostic deviation among the first diagnostic deviations stored in slot 1 or slot 2.
- the controller (220) of the battery management device (200) can set a diagnostic battery cell.
- the controller (220) can store a first diagnostic deviation and a voltage of the diagnostic battery cell. Since the first diagnostic deviation of the diagnostic battery cell is greater than the first diagnostic deviation of another battery cell different from the diagnostic battery cell, the first diagnostic deviation of the diagnostic battery cell can be stored in one of the two slots, and the maximum value of the first diagnostic deviation of another battery cell different from the diagnostic battery cell can be stored in the remaining slot.
- the battery management device (200) can store the maximum value among the first diagnostic deviations of a plurality of battery cells at each reference time, and compare the stored maximum value with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell is misdiagnosed.
- FIG. 9 illustrates an example in which a diagnostic battery cell is determined to be misdiagnosed based on the maximum value of the first diagnostic deviation in the past from the time at which the diagnostic battery cell was diagnosed.
- the battery management device (200) can continuously calculate the first diagnostic deviations of multiple battery cells at each reference time and update the maximum value in order to preserve data.
- the controller (220) of the battery management device (200) can store the maximum value among the first diagnostic deviations of each of the plurality of battery cells.
- the controller (220) can compare the first diagnostic deviation of the diagnostic battery cell with the maximum value of the first diagnostic deviation of a battery cell different from the diagnostic battery cell to determine whether the diagnostic battery cell is diagnosed normally. In this case, the controller (220) can preferentially compare the maximum value of the first diagnostic deviation of the diagnostic battery cell with the first diagnostic deviation of the diagnostic battery cell in the past rather than at the time when the diagnostic battery cell was diagnosed, and if the diagnostic battery cell is not determined to be misdiagnosed, the controller can wait for the diagnostic judgment of the diagnostic battery cell in order to compare the maximum value of the first diagnostic deviation in the future rather than at the time when the diagnostic battery cell was diagnosed.
- the controller (220) may wait for the diagnosis determination of the diagnostic battery cell until the minimum value among the voltages of the plurality of battery cells becomes higher than the voltage at the time of diagnosis of the diagnostic battery cell. According to an embodiment, if the minimum value among the voltages of the plurality of battery cells becomes higher than the voltage at the time of diagnosis of the diagnostic battery cell and is not determined to be a misdiagnosis, the controller (220) may determine that the diagnostic battery cell is diagnosed normally. According to an embodiment, the controller (220) may wait for the diagnosis determination of the diagnostic battery cell until the minimum value among the voltages of the plurality of battery cells becomes higher than a set voltage value or more than the voltage at the time of diagnosis of the diagnostic battery cell.
- the controller (220) can store the maximum value among the first diagnostic deviations of a battery cell different from the diagnostic battery cell at each reference time when the voltage of the diagnostic battery cell at the time of diagnosis is higher than the minimum value among the voltages of a plurality of battery cells.
- the controller (220) can compare the maximum value of the first diagnostic deviations of the diagnostic battery cell and the different battery cells with the first diagnostic deviation of the diagnostic battery cell at each reference time to determine whether the diagnostic battery cell has been diagnosed normally. That is, in FIG. 10, since the minimum value (3.98 V) of the voltages of the plurality of battery cells is lower than the voltage (4.1 V) at the diagnostic time of the diagnostic battery cell, the maximum value (2.4) of the first diagnostic deviations of the different battery cell and the diagnostic battery cell, which is greater than the value obtained by multiplying the first diagnostic deviation (3.2) of the diagnostic battery cell by the set value (0.72), is calculated, and therefore, the controller (220) can determine that the diagnostic battery cell has been misdiagnosed.
- the battery management device (200) according to another embodiment disclosed in this document, over-inspection can be prevented and the diagnosis rate can be increased by distinguishing between a voltage inflection point that commonly appears depending on the characteristics of the cell and a voltage inflection point due to a defect.
- FIG. 11 is a drawing for explaining an operation method of a battery management device according to another embodiment disclosed in this document. The operations illustrated in FIG. 11 can be performed through the battery management device (200) of FIG. 2.
- the measuring unit (210) may measure the voltage of each of the plurality of battery cells. For example, when the plurality of battery cells are being charged, the measuring unit (210) may measure the voltage of each of the plurality of battery cells at each reference time.
- the controller (220) can calculate a first deviation, which is a deviation between a long-term moving average value and a short-term moving average value of battery voltage for each of a plurality of battery cells.
- the controller (220) can calculate a second deviation, which is a deviation between a long-term moving average and a short-term moving average of the average voltages of multiple batteries.
- the controller (220) can calculate a first diagnostic deviation, which is the difference between the first deviation and the second deviation, for each of the plurality of battery cells.
- the controller (220) can remove noise of the first diagnostic deviation of each of the plurality of battery cells to calculate the second diagnostic deviation of each of the plurality of battery cells.
- the controller (220) can normalize the second diagnostic deviation of each of the plurality of battery cells to produce a third diagnostic deviation of each of the plurality of battery cells.
- the controller (220) can multiply the third diagnostic deviation of each of the plurality of battery cells by the bias to calculate the fourth diagnostic deviation of each of the plurality of battery cells.
- the controller (220) can compare the fourth diagnostic deviation of each of the plurality of battery cells with a threshold value.
- operations S304 to S307 may not be performed and operation S308 may be performed.
- the controller (220) can set the diagnostic battery cell. According to an embodiment, the controller (220) can set the diagnostic battery cell based on the first diagnostic deviation. According to another embodiment, the controller (220) can set the diagnostic battery cell based on any one of the second diagnostic deviation to the fourth diagnostic deviation.
- the controller (220) may compare the first diagnostic deviation of the battery cell having the maximum value among the first diagnostic deviations of different battery cells from the diagnostic battery cell with the first diagnostic deviation of the diagnostic battery cell to determine whether the diagnostic battery cell is diagnosed normally. According to an embodiment, in operation S309, the controller (220) may determine that the diagnostic battery cell is diagnosed normally if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by the set value exceeds the first diagnostic deviation of the battery cell having the maximum value, and may determine that the diagnostic battery cell is misdiagnosed if the value obtained by multiplying the first diagnostic deviation of the diagnostic battery cell by the set value is equal to or less than the first diagnostic deviation of the battery cell having the maximum value.
- FIG. 12 is a drawing specifically explaining an operation method of a battery management device according to another embodiment disclosed in this document. The operations illustrated in FIG. 12 can be performed through the battery management device (200) of FIG. 2.
- the controller (220) can calculate the first diagnostic deviation of each of the plurality of battery cells for each reference time.
- the controller (220) can update the first diagnostic deviation of the battery cell having the maximum value among the first diagnostic deviations of the battery cell different from the diagnostic battery cell at each reference time. That is, the controller (220) can update and store the maximum value among the first diagnostic deviations of the battery cell different from the diagnostic battery cell in the past or future from the time when the diagnostic battery cell was diagnosed.
- the controller (220) can calculate the first diagnostic deviation of the diagnostic battery cell at each reference time.
- the controller (220) can update the maximum value of the first diagnostic deviation of the diagnostic battery cell at each reference time.
- FIG. 13 is a block diagram showing the hardware configuration of a computing system that implements an operating method of a battery management device according to one embodiment disclosed in this document.
- a computing system (2000) may include an MCU (2100), a memory (2200), an input/output I/F (2300), and a communication I/F (2400).
- the MCU (2100) may be a processor that executes various programs (e.g., a battery cell voltage deviation analysis program) stored in the memory (2200), processes various data from these programs, and performs the functions of the battery management device (200) shown in FIG. 2 described above.
- programs e.g., a battery cell voltage deviation analysis program
- the memory (2200) can store various programs related to the operation of the battery management device (200). In addition, the memory (2200) can store operation data of the battery management device (200).
- the memories (2200) may be provided in multiple numbers as needed.
- the memories (2200) may be volatile memories or nonvolatile memories.
- volatile memories (2200) RAM, DRAM, SRAM, etc. may be used.
- nonvolatile memories (2200) ROM, PROM, EAROM, EPROM, EEPROM, flash memories, etc. may be used.
- the examples of the memories (2200) listed above are only examples and are not limited to these examples.
- the input/output I/F (2300) can provide an interface that enables data to be transmitted and received between an input device (not shown) such as a keyboard, mouse, or touch panel, and an output device (not shown) such as a display and the MCU (2100).
- an input device such as a keyboard, mouse, or touch panel
- an output device such as a display and the MCU (2100).
- the communication I/F (2400) is a configuration that can transmit and receive various data with the server, and may be various devices that can support wired or wireless communication. For example, programs for voltage deviation diagnosis, misdiagnosis judgment, and abnormality diagnosis, or various data, etc. can be transmitted and received from a separately provided external server through the communication I/F (2400).
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Abstract
Description
Claims (15)
- 복수의 배터리 셀 각각의 전압을 측정하는 전압 측정부; 및상기 복수의 배터리 셀 각각에 대해 배터리 셀 전압의 장기 이동 평균값 및 단기 이동 평균값 간의 편차인 제1 편차를 산출하고, 상기 복수의 배터리 셀의 평균 전압의 장기 이동 평균값 및 단기 이동 평균값 간의 편차인 제2 편차를 산출하고, 상기 복수의 배터리 셀 각각에 대해 상기 제1 편차와 상기 제2 편차 간의 차이인 제1 진단 편차를 산출하고,상기 복수의 배터리 셀 각각의 제1 진단 편차에 기반하여 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 진단 배터리 셀을 설정하고,상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갖는 배터리 셀의 제1 진단 편차와 상기 진단 배터리 셀의 제1 진단 편차를 비교하여 상기 진단 배터리 셀이 정상적으로 진단되었는지 여부를 판단하는 컨트롤러; 를 포함하는 배터리 관리 장치.
- 제 1 항에 있어서,상기 컨트롤러는,상기 진단 배터리 셀의 제1 진단 편차에 설정값을 곱한 값이 상기 최대값을 갖는 배터리 셀의 제1 진단 편차 초과인 경우 상기 진단 배터리 셀이 정상적으로 진단된 것으로 판단하고,상기 진단 배터리 셀의 제1 진단 편차에 설정값을 곱한 값이 상기 최대값을 갖는 배터리 셀의 제1 진단 편차 이하인 경우 상기 진단 배터리 셀이 오진단 된 것으로 판단하는, 배터리 관리 장치.
- 제 1 항에 있어서,상기 컨트롤러는,기준 시간마다 상기 복수의 배터리 셀 각각의 제1 진단 편차를 산출하고,상기 기준 시간마다 상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갖는 배터리 셀의 제1 진단 편차를 업데이트하는, 배터리 관리 장치.
- 제 1 항에 있어서,상기 컨트롤러는,기준 시간마다 상기 진단 배터리 셀의 제1 진단 편차를 산출하고,상기 기준 시간마다 상기 진단 배터리 셀의 제1 진단 편차의 최대값을 업데이트하는, 배터리 관리 장치.
- 제 1 항에 있어서,상기 컨트롤러는,상기 복수의 배터리 셀의 전압 중 최소값이 상기 진단 배터리 셀의 진단시 전압보다 높아지고 상기 진단 배터리 셀의 진단이 오진단으로 판단되지 않은 경우, 상기 진단 배터리 셀이 정상적으로 진단된 것으로 판단하는, 배터리 관리 장치.
- 제 1 항에 있어서,상기 컨트롤러는,기준 시간마다 상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갱신하고,갱신된 최대값과 상기 진단 배터리 셀의 제1 진단 편차를 비교하여 상기 진단 배터리 셀이 정상적으로 진단되었는지 여부를 판단하는, 배터리 관리 장치.
- 제 1 항에 있어서,상기 컨트롤러는,상기 복수의 배터리 셀 각각의 제1 진단 편차 중 상기 제2 편차에 임계 상수를 곱하여 얻어지는 기준값에 기초하여 상기 복수의 배터리 셀 각각의 제2 진단 편차를 산출하고,상기 복수의 배터리 셀 각각의 제2 진단 편차에 기초하여 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 상기 진단 배터리 셀을 설정하는, 배터리 관리 장치.
- 제 7 항에 있어서,상기 컨트롤러는,상기 제2 편차에 제1 임계 상수를 곱하여 얻어지는 값과 제2 임계 상수 중 최대값을 상기 기준값으로 설정하고,상기 복수의 배터리 셀 각각의 제1 진단 편차 중 상기 기준값 이하의 제1 진단 편차를 제외하여 상기 복수의 배터리 셀 각각의 제2 진단 편차를 산출하고,상기 복수의 배터리 셀 각각의 제2 진단 편차를 상기 제2 편차에 제3 임계 상수를 곱하여 얻어지는 값과 제4 임계 상수 중 최대값으로 나누어 정규화(Normalization)하여 상기 복수의 배터리 셀 각각의 제3 진단 편차를 산출하고,상기 복수의 배터리 셀 각각의 제3 진단 편차에 상기 복수의 배터리 셀 각각의 제3 진단 편차의 최소값을 더하여 얻어지는 값을 상기 제3 진단 편차로 나누어 상기 복수의 배터리 셀 각각의 편향도를 산출하고,상기 복수의 배터리 셀 각각의 제3 진단 편차에 상기 편향도를 곱하여 상기 복수의 배터리 셀 각각의 제4 진단 편차를 산출하고,상기 복수의 배터리 셀 각각의 제4 진단 편차의 임계값 초과 여부를 기초로 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 상기 진단 배터리 셀을 설정하는, 배터리 관리 장치.
- 복수의 배터리 셀 각각의 전압을 측정하는 동작;상기 복수의 배터리 셀 각각에 대해 배터리 셀 전압의 장기 이동 평균값 및 단기 이동 평균값 간의 편차인 제1 편차를 산출하고, 상기 복수의 배터리 셀의 평균 전압의 장기 이동 평균값 및 단기 이동 평균값 간의 편차인 제2 편차를 산출하고, 상기 복수의 배터리 셀 각각에 대해 상기 제1 편차와 상기 제2 편차 간의 차이인 제1 진단 편차를 산출하는 동작;상기 복수의 배터리 셀 각각의 제1 진단 편차에 기반하여 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 진단 배터리 셀을 설정하는 동작; 및상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갖는 배터리 셀의 제1 진단 편차와 상기 진단 배터리 셀의 제1 진단 편차를 비교하여 상기 진단 배터리 셀이 정상적으로 진단되었는지 여부를 판단하는 동작; 을 포함하는, 배터리 관리 장치의 동작 방법.
- 제 9 항에 있어서,상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갖는 배터리 셀의 제1 진단 편차와 상기 진단 배터리 셀의 제1 진단 편차를 비교하여 상기 진단 배터리 셀이 정상적으로 진단되었는지 여부를 판단하는 동작은,상기 진단 배터리 셀의 제1 진단 편차에 설정값을 곱한 값이 상기 최대값을 갖는 배터리 셀의 제1 진단 편차 초과인 경우 상기 진단 배터리 셀이 정상적으로 진단된 것으로 판단하고,상기 진단 배터리 셀의 제1 진단 편차에 설정값을 곱한 값이 상기 최대값을 갖는 배터리 셀의 제1 진단 편차 이하인 경우 상기 진단 배터리 셀이 오진단 된 것으로 판단하는, 배터리 관리 장치의 동작 방법.
- 제 9 항에 있어서,기준 시간마다 상기 복수의 배터리 셀 각각의 제1 진단 편차를 산출하는 동작; 및상기 기준 시간마다 상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갖는 배터리 셀의 제1 진단 편차를 업데이트하는 동작; 을 더 포함하는 배터리 관리 장치의 동작 방법.
- 제 9 항에 있어서,기준 시간마다 상기 진단 배터리 셀의 제1 진단 편차를 산출하는 동작; 및상기 기준 시간마다 상기 진단 배터리 셀의 제1 진단 편차의 최대값을 업데이트하는 동작; 을 더 포함하는, 배터리 관리 장치의 동작 방법.
- 제 9 항에 있어서,상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갖는 배터리 셀의 제1 진단 편차와 상기 진단 배터리 셀의 제1 진단 편차를 비교하여 상기 진단 배터리 셀이 정상적으로 진단되었는지 여부를 판단하는 동작은,기준 시간마다 상기 진단 배터리 셀과 상이한 배터리 셀의 제1 진단 편차 중 최대값을 갱신하는 동작; 및갱신된 최대값과 상기 진단 배터리 셀의 제1 진단 편차를 비교하여 상기 진단 배터리 셀이 정상적으로 진단되었는지 여부를 판단하는 동작; 을 포함하는, 배터리 관리 장치의 동작 방법.
- 제 9 항에 있어서,상기 복수의 배터리 셀 각각의 제1 진단 편차에 기반하여 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 진단 배터리 셀을 설정하는 동작은,상기 복수의 배터리 셀 각각의 제1 진단 편차 중 상기 제2 편차에 임계 상수를 곱하여 얻어지는 기준값에 기초하여 상기 복수의 배터리 셀 각각의 제2 진단 편차를 산출하는 동작; 및상기 복수의 배터리 셀 각각의 제2 진단 편차에 기초하여 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 상기 진단 배터리 셀을 설정하는 동작; 을 포함하는, 배터리 관리 장치의 동작 방법.
- 제 14 항에 있어서,상기 복수의 배터리 셀 각각의 제2 진단 편차에 기초하여 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 상기 진단 배터리 셀을 설정하는 동작은,상기 제2 편차에 제1 임계 상수를 곱하여 얻어지는 값과 제2 임계 상수 중 최대값을 상기 기준값으로 설정하는 동작;상기 복수의 배터리 셀 각각의 제1 진단 편차 중 상기 기준값 이하의 제1 진단 편차를 제외하여 상기 복수의 배터리 셀 각각의 제2 진단 편차를 산출하는 동작;상기 복수의 배터리 셀 각각의 제2 진단 편차를 상기 제2 편차에 제3 임계 상수를 곱하여 얻어지는 값과 제4 임계 상수 중 최대값으로 나누어 정규화(Normalization)하여 상기 복수의 배터리 셀 각각의 제3 진단 편차를 산출하는 동작;상기 복수의 배터리 셀 각각의 제3 진단 편차에 상기 복수의 배터리 셀 각각의 제3 진단 편차의 최소값을 더하여 얻어지는 값을 상기 제3 진단 편차로 나누어 상기 복수의 배터리 셀 각각의 편향도를 산출하는 동작;상기 복수의 배터리 셀 각각의 제3 진단 편차에 상기 편향도를 곱하여 상기 복수의 배터리 셀 각각의 제4 진단 편차를 산출하는 동작; 및상기 복수의 배터리 셀 각각의 제4 진단 편차의 임계값 초과 여부를 기초로 상기 복수의 배터리 셀 중 적어도 하나의 배터리 셀을 진단하여 상기 진단 배터리 셀을 설정하는 동작; 을 포함하는, 배터리 관리 장치의 동작 방법.
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| KR1020230059022A KR20240162236A (ko) | 2023-05-08 | 2023-05-08 | 배터리 관리 장치 및 그것의 동작 방법 |
| KR10-2023-0059022 | 2023-05-08 |
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| WO2024232510A1 true WO2024232510A1 (ko) | 2024-11-14 |
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| PCT/KR2024/001613 Ceased WO2024232510A1 (ko) | 2023-05-08 | 2024-02-02 | 배터리 관리 장치 및 그것의 동작 방법 |
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| Country | Link |
|---|---|
| EP (1) | EP4660650A4 (ko) |
| KR (1) | KR20240162236A (ko) |
| CN (1) | CN120898142A (ko) |
| WO (1) | WO2024232510A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002334722A (ja) * | 2001-05-09 | 2002-11-22 | Matsushita Electric Ind Co Ltd | 二次電池の検査方法 |
| KR20210022417A (ko) * | 2019-08-20 | 2021-03-03 | 주식회사 엘지화학 | 배터리 팩의 진단 방법, 배터리 관리 시스템 및 배터리 장치 |
| CN114518539A (zh) * | 2022-01-14 | 2022-05-20 | 北京交通大学 | 一种动力电池soc异常分析方法 |
| KR20220074797A (ko) * | 2020-11-27 | 2022-06-03 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치, 배터리 진단 방법, 배터리 팩 및 자동차 |
| KR20220146255A (ko) * | 2021-04-23 | 2022-11-01 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230059022A (ko) | 2021-10-25 | 2023-05-03 | 남춘환 | 면상 감지 레인 센서 장치 및 이를 구비한 프로젝트형 태양광 창문 시스템 |
-
2023
- 2023-05-08 KR KR1020230059022A patent/KR20240162236A/ko active Pending
-
2024
- 2024-02-02 CN CN202480020049.5A patent/CN120898142A/zh active Pending
- 2024-02-02 EP EP24803567.7A patent/EP4660650A4/en active Pending
- 2024-02-02 WO PCT/KR2024/001613 patent/WO2024232510A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002334722A (ja) * | 2001-05-09 | 2002-11-22 | Matsushita Electric Ind Co Ltd | 二次電池の検査方法 |
| KR20210022417A (ko) * | 2019-08-20 | 2021-03-03 | 주식회사 엘지화학 | 배터리 팩의 진단 방법, 배터리 관리 시스템 및 배터리 장치 |
| KR20220074797A (ko) * | 2020-11-27 | 2022-06-03 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치, 배터리 진단 방법, 배터리 팩 및 자동차 |
| KR20220146255A (ko) * | 2021-04-23 | 2022-11-01 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
| CN114518539A (zh) * | 2022-01-14 | 2022-05-20 | 北京交通大学 | 一种动力电池soc异常分析方法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4660650A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4660650A1 (en) | 2025-12-10 |
| CN120898142A (zh) | 2025-11-04 |
| EP4660650A4 (en) | 2026-04-01 |
| KR20240162236A (ko) | 2024-11-15 |
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