WO2022092827A1 - 배터리 관리 장치 및 방법 - Google Patents
배터리 관리 장치 및 방법 Download PDFInfo
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- WO2022092827A1 WO2022092827A1 PCT/KR2021/015261 KR2021015261W WO2022092827A1 WO 2022092827 A1 WO2022092827 A1 WO 2022092827A1 KR 2021015261 W KR2021015261 W KR 2021015261W WO 2022092827 A1 WO2022092827 A1 WO 2022092827A1
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- Prior art keywords
- side reaction
- battery cell
- voltage
- capacity
- soc
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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
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current 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]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
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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
- G01R19/10—Measuring sum, difference or ratio
-
- 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
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- 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
-
- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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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- 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
-
- 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
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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
- the present invention relates to a battery management apparatus and method, and more particularly, to a battery management apparatus and method capable of determining a type of a side reaction occurring in a battery cell and setting operating conditions of the battery cell.
- the present invention has been devised to solve the above problems, and determines the type of side reaction generated in the battery based on the voltage deviation and capacity deviation of the battery at different time points, and sets the operating conditions of the battery appropriately.
- An object of the present invention is to provide an apparatus and method for managing a battery capable of being used.
- a battery management apparatus is configured to measure a first voltage of a battery cell at a first time point, and measure a second voltage and a second capacity of the battery cell at a second time point after the first time point measuring unit; and calculating a voltage deviation between the first voltage and the second voltage, calculating a capacity deviation between the first capacity corresponding to the first voltage and the second capacity, and based on the voltage deviation and the capacity deviation, the and a control unit configured to determine a positive side reaction factor and a negative side reaction factor for the battery cell, and to determine a type of side reaction of the battery cell based on the positive side reaction factor and the negative side reaction factor.
- the controller is configured to calculate a voltage-based capacity corresponding to the voltage deviation based on a battery profile indicating a correspondence relationship between the SOC of the battery cell and a voltage, and according to the first voltage, the voltage-based capacity or the voltage-based capacity; and determine the anode side reaction factor based on the capacity deviation.
- the control unit may be configured to estimate a first SOC corresponding to the first voltage, compare the estimated first SOC with a preset reference SOC, and determine a positive negative reaction factor of the battery cell to correspond to the comparison result. there is.
- the controller may be configured to determine the anode side reaction factor based on the voltage-based capacity when the first SOC is equal to or greater than the reference SOC.
- the controller may be configured to determine the anode side reaction factor based on a difference between the voltage-based capacity and the calculated capacity deviation when the first SOC is less than the reference SOC.
- the controller may be configured to set, as the reference SOC, an SOC at a point where a negative electrode flattening period starts in a differential profile representing a correspondence relationship between the SOC of the battery cell and a differential voltage with respect to the SOC.
- the controller may be configured to determine a target peak included in a predetermined SOC section in the differential profile, and set an SOC corresponding to the determined target peak as the reference SOC.
- the control unit may be configured to determine a negative side reaction factor for the battery cell based on the capacity deviation.
- the control unit calculates a side reaction reference value based on the positive side reaction factor and the negative side reaction factor, compares the calculated side reaction reference value with a preset side reaction reference value, and determines the type of side reaction of the battery cell according to the comparison result. Or it may be configured to determine the negative side reaction.
- the controller may be configured to set an operating condition for the battery cell based on the type of side reaction determined for the battery cell.
- the controller may be configured to decrease at least one of an upper limit SOC and an upper limit voltage for the battery cell when it is determined that the type of the side reaction of the battery cell is the positive side reaction.
- the controller may be configured to decrease an upper limit temperature of the battery cell when it is determined that the type of the side reaction of the battery cell is the negative side reaction.
- the battery management apparatus may further include a discharge unit configured to discharge the battery cell at the second time point.
- the measuring unit may be configured to measure the second capacity by measuring an amount of discharge current of the battery cell while the battery cell is discharged at the second time point.
- the battery cell may be configured to maintain a predetermined temperature or more from the first time point to the second time point.
- a battery pack according to another aspect of the present invention may include the battery management apparatus according to an aspect of the present invention.
- a battery management method includes a first measuring step of measuring a first voltage of a battery cell at a first time point; a second measurement step of measuring a second voltage and a second capacity of the battery cell at a second time point after the first time point; a voltage deviation and capacity deviation calculating step of calculating a voltage deviation between the first voltage and the second voltage and calculating a capacity deviation between the first capacitance corresponding to the first voltage and the second capacity; a side reaction factor determining step of determining a positive side reaction factor and a negative side reaction factor for the battery cell based on the voltage deviation and the capacity deviation; and a side reaction type determination step of determining a type of a side reaction of the battery cell based on the positive side reaction factor and the negative side reaction factor.
- the type of side reaction generated in the battery cell can be determined based on the voltage deviation of the battery cell and the capacity deviation of the battery cell at both time points.
- an optimal operating condition for the battery cell can be set to correspond to the type of side reaction determined for the battery cell.
- FIG. 1 is a diagram schematically illustrating a battery management apparatus according to an embodiment of the present invention.
- FIG. 2 is a diagram schematically illustrating a battery profile according to an embodiment of the present invention.
- FIG. 3 is a diagram schematically illustrating a change in the capacity of a battery cell at each time point according to an embodiment of the present invention.
- FIG. 4 is a diagram schematically illustrating a differential profile according to an embodiment of the present invention.
- FIG. 5 is a diagram schematically illustrating side reactions that may occur in a battery cell according to an embodiment of the present invention.
- FIG. 6 is a diagram schematically illustrating a battery pack according to another embodiment of the present invention.
- FIG. 7 is a diagram schematically illustrating a battery management method according to another embodiment of the present invention.
- a term such as a control unit described in the specification means a unit for processing at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.
- FIG. 1 is a diagram schematically illustrating a battery management apparatus 100 according to an embodiment of the present invention.
- the battery management apparatus 100 may include a measurement unit 110 and a control unit 120 .
- the measurement unit 110 measures a first voltage of the battery cell at a first time point T1 and measures a second voltage and a second capacity of the battery cell at a second time point T2 after the first time point T1 can be configured to
- the battery includes a negative terminal and a positive terminal, and refers to one physically separable independent cell.
- a lithium ion battery or a lithium polymer battery may be considered a battery.
- the second time point T2 is different from the first time point T1 , and may be a time point after a predetermined time has elapsed from the first time point T1 . That is, the measuring unit 110 measures the voltage (first voltage) of the battery cell at the first time point T1, and then the voltage (second voltage) and capacity (second voltage) of the battery cell at the second time point T2. capacity) can be measured.
- the first time point T1 may be a time point at which the storage of the battery cells is started
- the second time point T2 may be a time point at which the storage of the battery cells is finished.
- the measurement unit 110 may measure the voltage of the battery cell at the storage start time and the storage end time of the battery cell, and measure the remaining capacity of the battery cell at the storage end time point.
- the measurement unit 110 may measure an open circuit voltage (OCV) of the battery cell at the first time point T1 and the second time point T2 .
- OCV open circuit voltage
- the battery profile BP may include a full cell profile FP, a positive electrode profile PP, and a negative electrode profile NP for the battery cell.
- the full cell profile FP is a profile indicating the correspondence between the voltage of the battery cell and the SOC.
- the positive electrode profile PP is a profile representing the correspondence between the positive electrode voltage of the battery cell and the SOC of the battery cell.
- the negative electrode profile NP is a profile representing the correspondence between the negative voltage of the battery cell and the SOC of the battery cell.
- B1 may be a battery cell at a first time point T1
- B2 may be a battery cell at a second time point T2
- the measurement unit 110 measures the first voltage of the battery cell B1 at the first time point T1 as 4.1 [V], and sets the second voltage of the battery cell B2 at the second time point T2 to 4.0 [V]. V] can be measured.
- the controller 120 may be configured to calculate a voltage deviation between the first voltage and the second voltage.
- control unit 120 may be connected to the measurement unit 110 so as to be able to communicate through wired and/or wireless.
- the controller 120 may receive the first voltage and the second voltage from the measurement unit 110 , and may calculate a voltage deviation between the received first voltage and the second voltage.
- the controller 120 may calculate a voltage deviation by calculating an expression of “first voltage-second voltage”.
- the controller 120 may calculate the equation of “4.1 [V]-4.0 [V]” to calculate the voltage deviation as 0.1 [V].
- the controller 120 may be configured to calculate a capacity deviation between the first capacity and the second capacity corresponding to the first voltage.
- the controller 120 may calculate a capacity deviation by calculating a formula of “first capacity-second capacity”.
- the controller 120 may estimate the first SOC corresponding to the first voltage using the battery profile BP. Then, the controller 120 calculates the first capacity corresponding to the first voltage by using the capacity (eg, the rated capacity of the battery cell) and the estimated first SOC of the battery cell in the beginning of life (BOL) state. can do. For example, when the capacity of the BOL battery cell is Q0 and the estimated first SOC is 90%, the controller 120 may calculate “Q0 ⁇ 0.9” as the first capacity.
- the capacity eg, the rated capacity of the battery cell
- BOL beginning of life
- the second capacity of the battery cell may be the remaining capacity of the battery cell at the second time point T2 .
- the battery management apparatus 100 may further include a discharge unit 130 .
- the discharge unit 130 may be provided in the battery management apparatus 100 , and an operating state may be controlled by the control unit 120 .
- the discharging unit 130 may be configured to form a discharging path capable of discharging the battery cells when receiving a discharging command for the battery cells from the control unit 120 .
- the discharge unit 130 includes a resistor (not shown) and a switching element (not shown), and when the switching element is controlled to be turned on by the controller 120 , the battery cell may be discharged. Thereafter, when the switching element is controlled to be turned off by the controller 120 , discharge of the battery cells may be terminated.
- the switching element is an element whose operating state can be controlled by the controller 120, it may be applied without limitation.
- a contactor, a relay, a field effect transistor (FET), or a metal oxide semiconductor field effect transistor (MOSFET) may be applied to the switching device.
- FET field effect transistor
- MOSFET metal oxide semiconductor field effect transistor
- the measurement unit 110 may be configured to measure the second capacity by measuring the amount of discharge current of the battery cell while the battery cell is being discharged at the second time point T2 .
- the measurement unit 110 may measure the second capacity of the battery cell by accumulating the amount of discharge current output from the battery cell while the battery cell is being discharged.
- FIG. 3 is a diagram schematically illustrating a change in the capacity of a battery cell at each time point according to an embodiment of the present invention.
- B0 may be a battery cell in the BOL state, and Q0 may be the maximum capacity of the battery cell B0 in the BOL state.
- B1 may be a battery cell at the first time point T1
- Q1 may be the capacity of the battery cell B1 at the first time point T1 .
- B2 may be a battery cell at the second time point T2, and Q2 may be the capacity of the battery cell B2 at the second time point T2.
- the first capacity preset for the battery cell may be Q0
- the second capacity of the battery cell may be Q3.
- the units of Q0, Q1, and Q2 may be [mAh].
- the controller 120 may be configured to calculate the capacity deviation Qi based on a difference between the first capacity and the second capacity of the battery cell. Specifically, the controller 120 may calculate the capacity deviation Qi of the battery cell by calculating the formula of “first capacity-second capacity”.
- the controller 120 calculates the formula “Q1-Q2” to calculate the capacity deviation Qi of the battery cells.
- the controller 120 may be configured to determine a positive side reaction factor and a negative side reaction factor for the battery cell based on the voltage deviation and the capacity deviation.
- the positive side reaction factor may be a numerical value of the positive side reaction generated in the battery cell
- the negative side reaction factor may be a value obtained by quantifying the negative side reaction generated in the battery cell.
- the positive side reaction factor and the negative side reaction factor are values related to the capacity of the battery cell, and the unit may be the same [mAh] as the capacity unit of the battery cell.
- controller 120 determines the positive side reaction factor and the negative side reaction factor for the battery cell based on the voltage deviation and the capacity deviation will be described later.
- control unit 120 may be configured to determine the type of side reaction of the battery cell based on the positive side reaction factor and the negative side reaction factor.
- control unit 120 may determine the type of side reaction that occurs more frequently in the battery cell in consideration of the positive side reaction factor and the negative side reaction factor.
- control unit 120 may specifically classify and diagnose the type of side reaction that occurs more in the battery cell.
- the controller 120 may be configured to calculate a side reaction reference value based on the positive side reaction factor and the negative side reaction factor.
- the controller 120 may calculate a formula of “positive side reaction factor ⁇ negative side reaction factor” to calculate a side reaction reference value.
- control unit 120 may compare the calculated side reaction reference value with a preset side reaction reference value.
- the side reaction reference value is a preset value, and may be a value indicating a criterion for classifying a side reaction type of a battery cell into a positive side reaction or a negative side reaction according to the side reaction reference value.
- the side reaction reference value may be preset to 0.5.
- control unit 120 may be configured to determine the type of the side reaction of the battery cell as a positive side reaction or a negative side reaction according to the comparison result of the side reaction reference value and the side reaction reference value.
- the controller 120 may determine the type of side reaction of the battery cell as a positive side reaction. As another example, when the side reaction reference value is less than the reference value, the controller 120 may determine the type of side reaction of the battery cell as a negative side reaction.
- control unit 120 determines the type of side reaction of the battery cell using the ratio of the positive side reaction factor to the negative side reaction factor, but the control unit 120 controls the positive side reaction factor and the negative side reaction factor.
- the type of side reaction of the battery cell may be determined based on the comparison between the difference value and another preset reference value.
- the cause of the anode side reaction and the cathode side reaction generated in the battery cell may be different, and operating conditions for preventing further side reactions from occurring may be different. Accordingly, in the battery management apparatus 100 according to an embodiment of the present invention, the voltage deviation of the battery cells and the capacity deviation Qi of the battery cells at both time points (the first time point T1 and the second time point T2) Based on this, there is an advantage in that the type of side reaction generated in the battery cell can be specifically determined.
- control unit 120 provided in the battery management apparatus 100 is a processor, an application-specific integrated circuit (ASIC), other chipsets, logic circuits, and registers known in the art to execute various control logics performed in the present invention.
- ASIC application-specific integrated circuit
- the controller 120 may be implemented as a set of program modules.
- the program module may be stored in the memory and executed by the controller 120 .
- the memory may be inside or outside the control unit 120 , and may be connected to the control unit 120 by various well-known means.
- the battery management apparatus 100 may further include a storage unit 140 .
- the storage unit 140 may store data necessary for each component of the battery management apparatus 100 to perform an operation and function, a program or data generated while an operation and a function are performed.
- the storage unit 140 is not particularly limited in its type as long as it is a known information storage means capable of writing, erasing, updating and reading data.
- the information storage means may include RAM, flash memory, ROM, EEPROM, registers, and the like.
- the storage unit 140 may store program codes in which processes executable by the control unit 120 are defined.
- the storage 140 may store the battery profile BP according to the embodiment of FIG. 2 in advance.
- the storage unit 140 stores the BOL capacity Q0 of the battery cell B0 in the BOL state according to the embodiment of FIG. 3 , the voltage and capacity Q1 of the battery cell B1 at the first time point T1 , and The voltage and capacity Q2 of the battery cell B2 at the second time point T2 may be stored.
- controller 120 calculates the voltage-based capacity from the voltage difference between the voltage of the battery cell B1 at the first time point T1 and the voltage of the battery cell B2 at the second time point T2 explain about
- the controller 120 may be configured to calculate a voltage-based capacity corresponding to a voltage deviation based on a battery profile BP indicating a correspondence relationship between an SOC of a battery cell and a voltage.
- the control unit 120 controls the first SOC corresponding to the voltage of the battery cell B1 at the first time point T1 and the battery cell B2 at the second time point T2.
- a second SOC corresponding to the voltage may be estimated.
- the controller 120 may estimate the first SOC corresponding to the first voltage 4.1 [V] of the battery cell B1 at the first time point T1 as 90%.
- the controller 120 may estimate the second SOC corresponding to the second voltage 4.0 [V] of the battery cell B2 at the second time point T2 as 80%.
- the controller 120 controls between the first SOC corresponding to the voltage of the battery cell B1 at the first time point T1 and the second SOC corresponding to the voltage of the battery cell B2 at the second time point T2.
- the SOC deviation can be calculated.
- the controller 120 may calculate the SOC deviation between the first SOC (90%) and the second SOC (80%) as 10%.
- the controller 120 may calculate the voltage-based capacity corresponding to the SOC deviation based on the BOL capacity Q0 of the BOL battery cell B0. For example, in the embodiment of FIG. 2 , the controller 120 may calculate the voltage-based capacity corresponding to the SOC deviation (10%) based on the BOL capacity Q0 of the BOL battery cell B0.
- the controller 120 controls the capacity corresponding to the first SOC of the battery cell B1 at the first time point T1 and the capacity corresponding to the second SOC of the battery cell B2 at the second time point T2. can be calculated individually. Also, the controller 120 may calculate a voltage-based capacity by calculating a difference between the capacity corresponding to the first SOC and the capacity corresponding to the second SOC.
- controller 120 determines the anode side reaction factor
- the control unit 120 may be configured to determine the anode side reaction factor based on the voltage-based capacity or the voltage-based capacity and the capacity deviation Qi according to the first voltage.
- the controller 120 may estimate the first SOC corresponding to the first voltage.
- the first voltage may be a voltage value measured by the measurement unit 110 as the voltage of the battery cell B1 at the first time point T1 .
- the controller 120 may estimate the first SOC corresponding to the first voltage by using the battery profile BP.
- the controller 120 may compare the estimated first SOC with a preset reference SOC.
- the reference SOC may be preset to an SOC that starts not being affected by the negative electrode of the battery cell.
- SOC 58% may be preset as the reference SOC. Details of the control unit 120 setting the reference SOC will be described later.
- the control unit 120 may be configured to determine the positive side reaction factor of the battery cell to correspond to the comparison result of the first SOC and the reference SOC.
- control unit 120 may be configured to determine the anode side reaction factor based on the voltage-based capacity corresponding to the voltage deviation.
- the control unit 120 determines the anode side reaction factor as a voltage-based capacity corresponding to the voltage deviation between the first voltage and the second voltage. can decide
- the controller 120 may determine the positive side reaction factor based on a difference between the voltage-based capacity corresponding to the voltage deviation and the negative side reaction factor.
- the control unit 120 may be configured to determine the anode side reaction factor based on a difference between the voltage-based capacity corresponding to the voltage deviation and the calculated capacity deviation Qi.
- the controller 120 determines the anode side reaction factor based on the voltage affected by the anode side reaction.
- a value obtained by subtracting the capacity deviation (Qi) affected by the negative side reaction from the capacity may be determined as the positive side reaction factor.
- the controller 120 may determine the positive side reaction factor by calculating the formula of “voltage-based capacity-capacity deviation Qi”.
- the controller 120 subtracts the capacity deviation Qi due to the negative side reaction from the voltage-based capacity calculated based on the voltage difference between the first time point T1 and the second time point T2 as the positive side reaction factor. can decide
- the battery management apparatus 100 uses the SOC of the battery cell B1 at the first time point T1 in the process of determining the anode side reaction factor, thereby more accurately representing the anode side reaction. It has the advantage of being able to determine side-response factors. Accordingly, the battery management apparatus 100 has the advantage of more accurately determining the type of side reaction of the battery cell based on the comparison result of the positive side reaction factor and the negative side reaction factor.
- the controller 120 may be configured to acquire a battery profile BP indicating a correspondence relationship between the SOC of the battery cell and the voltage of the battery cell.
- the controller 120 may acquire the battery profile BP stored in the storage 140 .
- the controller 120 may store the battery profile BP in an internal memory, and may receive the battery profile BP from the outside.
- the controller 120 may be configured to set the SOC of the point where the negative electrode flattening period F of the battery cell starts in the obtained battery profile BP as the reference SOC.
- the negative electrode flattening period F may mean a period in which the negative electrode voltage of the battery cell is the same or changes within a predetermined range even if the SOC of the battery cell increases in the negative electrode profile NP of the battery cell. That is, the negative electrode flattening section F means a section in which the negative electrode voltage does not change or hardly changes even when the SOC of the battery cell is increased. Such a cathode flat section F may appear at an SOC of 50% or more.
- the negative electrode flat section F may be 58% to 100% SOC. Accordingly, the controller 120 may set SOC 58%, which is the point where the cathode flattening section F starts, as the reference SOC.
- the controller 120 may more accurately set the reference SOC based on the differential profile indicating the correspondence between the SOC of the battery cell and the differential voltage.
- the differential voltage may be an instantaneous rate of change of the voltage with respect to the SOC. That is, the differential voltage is a differential value of the voltage with respect to the SOC, and may be expressed as dV/dSOC.
- the differential profile may be expressed as an X-Y graph when X is set as SOC and Y is set as differential voltage (dV/dSOC).
- FIG. 4 is a diagram schematically illustrating a differential profile (DP) according to an embodiment of the present invention. Specifically, FIG. 4 may be a differential profile DP corresponding to the battery profile BP of FIG. 2 .
- the controller 120 may generate the differential profile DP indicating the correspondence between the SOC and the differential voltage based on the battery profile BP.
- the differential profile DP may be previously stored in the storage 140 , and the controller 120 may access the storage 140 to obtain the differential profile DP.
- the controller 120 may acquire the differential profile DP by receiving the differential profile DP from the outside.
- the controller 120 may be configured to determine a target peak TP included in a predetermined SOC section from the obtained differential profile DP.
- the differential profile DP may include a plurality of peaks.
- the peak is a point at which the instantaneous rate of change of the differential voltage with respect to the SOC in the differential profile DP is 0, and may be a point at which the instantaneous rate of change changes from positive to negative with respect to the peak. That is, the peak may be a point having an upward convex opening in the differential profile DP.
- the controller 120 may determine a peak included in a predetermined SOC section among a plurality of peaks included in the differential profile DP as the target peak TP.
- the predetermined SOC interval may be preset to include the SOC at which the negative electrode flattening interval F starts in the negative electrode profile NP of the battery cell.
- a predetermined SOC section may be preset to a section of 50% SOC to 60% SOC.
- the controller 120 may determine a peak located at 58% SOC among a plurality of peaks included in the differential profile DP as the target peak TP.
- controller 120 may be configured to set the SOC corresponding to the determined target peak TP as the reference SOC.
- the controller 120 may set SOC 58% corresponding to the target peak TP as the reference SOC. That is, the target peak TP may be a peak corresponding to a point where the negative electrode flattening period F starts in the negative electrode profile NP of the battery cell.
- the controller 120 may set the reference SOC in consideration of both the battery profile BP and the differential profile DP.
- the controller 120 may determine the SOC of the point where the negative electrode flattening period F starts in the negative electrode profile NP of the battery cell, and determine the SOC corresponding to the target peak TP in the differential profile DP. there is. And, when the two determined SOCs are the same, the controller 120 may set the determined SOC as the reference SOC. If the two SOCs determined by the control unit 120 are not the same, the control unit 120 may set the SOC determined based on the differential profile DP as the reference SOC.
- controller 120 determines the negative side reaction factor
- the controller 120 may be configured to determine a negative side reaction factor for the battery cell based on the capacity deviation.
- the controller 120 may estimate the first SOC from the first voltage of the battery cell B1 at the first time point T1 using the battery profile BP. In addition, the controller 120 may calculate the first capacity corresponding to the first SOC based on the BOL capacity Q0 of the BOL battery cell B0.
- the capacity of the battery cell B1 at the first time point T1 may be calculated as Q1 [mAh].
- the controller 120 may control the discharge unit 130 to discharge the battery cell B2 at the second time point T2 . While the battery cell B2 is discharged by the discharge unit 130 , the measurement unit 110 may measure the discharge current of the battery cell B2 to calculate the discharge amount. Here, the discharge amount is the remaining capacity of the battery cell B2 at the second time point T2.
- the measurement unit 110 may calculate the capacity of the battery cell B1 at the second time point T2 as Q2 [mAh].
- the controller 120 may calculate a difference between the first capacity Q1 and the second capacity Q2 to calculate the capacity deviation Qi. That is, the capacity deviation Qi may be the amount of change in the capacity of the battery cell from the first time point T1 to the second time point T2. More specifically, the capacity deviation Qi may be the amount of self-discharge of the battery cell from the first time point T1 to the second time point T2.
- the controller 120 may determine the calculated capacity deviation Qi as a negative side reaction factor for the battery cell.
- FIG. 5 is a diagram schematically illustrating side reactions that may occur in a battery cell according to an embodiment of the present invention.
- a Solid Electrolyte Interphase (SEI) S1 may be generated. Thereafter, when lithium ions (Li+) are further supplied to the negative electrode N from the electrolyte, SEI(S2) may be further generated on the surface of the generated SEI(S1). That is, when a side reaction occurs in the negative electrode N of the battery cell, since lithium ions (Li+) and electrons (e-) included in the battery cell may be irreversibly reduced, the controller 120 controls the calculated capacity A negative side reaction factor may be determined based on the deviation (Qi).
- the controller 120 controls the capacity deviation Qi according to the difference between the capacity Q1 of the battery cell B1 at the first time point T1 and the capacity Q2 of the battery cell B2 at the second time point T2. ) may be calculated, and the calculated capacity deviation (Qi) may be determined as a negative negative reaction factor.
- the controller 120 determines the voltage difference between the battery cells at the first time point T1 and the second time point T2. Voltage-based capacity can be determined as an anode side reaction factor.
- the controller 120 may determine a value obtained by subtracting the capacity deviation Qi from the voltage-based capacity as the anode side reaction factor.
- the battery management apparatus 100 determines the positive side reaction factor in consideration of the voltage of the battery cell B1 at the first time point T1 when the battery cell starts to be stored, and the battery cell is stored.
- the negative side reaction factor may be determined in consideration of the amount of capacity change (eg, self-discharge amount) during operation. Accordingly, the battery management apparatus 100 has the advantage of being able to specifically determine the positive side reaction factor for the positive side reaction of the battery cell and the negative side reaction factor for the negative side reaction of the battery cell.
- the controller 120 may be configured to set an operating condition for the battery cell based on the type of side reaction determined for the battery cell.
- the controller 120 may set different operating conditions for the battery cell according to the type of side reaction of the battery cell. That is, in order to effectively prevent further deterioration of the battery cell, the controller 120 may appropriately set the operating condition of the battery cell according to the type of side reaction of the battery cell.
- the control unit 120 when it is determined that the type of side reaction of the battery cell is a positive side reaction, the control unit 120 reduces at least one of an upper limit SOC (maximum allowable SOC) and an upper limit voltage (maximum allowable voltage) for the battery cell. can be configured.
- an upper limit SOC maximum allowable SOC
- an upper limit voltage maximum allowable voltage
- control unit 120 may be configured to decrease the upper limit temperature (maximum allowable temperature) for the battery cell.
- the controller 120 may set an optimal operating condition for the battery cell to correspond to the determined type of side reaction of the battery cell.
- the operating conditions set in this way may be stored in the storage unit 140 and/or the control unit 120 and may be considered in the driving process of the corresponding battery cell. That is, the corresponding battery cell is operated according to the operating condition set by the controller 120 , so that an unexpected side reaction is additionally generated in the battery cell, and thus the rapid deterioration of the battery cell can be prevented.
- the operating conditions set by the controller 120 may be stored in an external server.
- Such an external server may induce the corresponding battery cell to be operated according to the set operating condition by transmitting the operating condition set to the device or system in which the corresponding battery cell is provided.
- the battery cell may be configured to maintain a predetermined temperature or more from the first time point T1 to the second time point T2 .
- the predetermined temperature may be a temperature of 40° C. or higher.
- the electrolyte included in the battery cell may be decomposed, and lithium ions (Li+) included in the electrolyte may be supplied to the positive electrode and/or the negative electrode.
- the high potential side (high SOC side) capacity of the positive electrode supplied with lithium ions (Li+) from the electrolyte may not be used.
- SEI (S2) described with reference to FIG. 5 may be further generated in the negative electrode supplied with lithium ions (Li+) from the electrolyte.
- the battery management apparatus 100 when a condition (eg, a predetermined temperature maintenance condition) in which a side reaction may occur in the storage process of a battery cell is satisfied, the battery management apparatus 100 according to an embodiment of the present invention provides a positive electrode side reaction to the battery cell. It can be specifically determined whether the occurrence is predominant or whether the occurrence of the cathodic side reaction is predominant. In addition, the battery management apparatus 100 may appropriately set operating conditions for a battery cell that satisfies the temperature maintenance condition.
- a condition eg, a predetermined temperature maintenance condition
- the battery management apparatus 100 may be applied to a Battery Management System (BMS). That is, the BMS according to the present invention may include the above-described battery management apparatus 100 . In this configuration, at least some of each component of the battery management apparatus 100 may be implemented by supplementing or adding functions of the configuration included in the conventional BMS. For example, the measurement unit 110 , the control unit 120 , the discharge unit 130 , and the storage unit 140 of the battery management apparatus 100 may be implemented as components of the BMS.
- BMS Battery Management System
- the battery management apparatus 100 may be applied to a battery storage system as well as a BMS.
- the battery storage system may be a system capable of storing battery cells from a first time point T1 to a second time point T2.
- the manufactured battery cells may be loaded and shipped in a storage space such as a container.
- the battery management apparatus 100 may be applied to a battery storage system to diagnose the state of a battery cell stored in a no-load state from a first time point T1 to a second time point T2 .
- the battery management apparatus 100 may specifically determine the type of side reaction generated in the battery cells while the battery cells are stored in a no-load state, and set an operating condition suitable for each battery cell. Accordingly, the corresponding battery cell is operated according to the operating condition set by the battery management apparatus 100 , thereby effectively preventing an additional side reaction from occurring. As a result, deterioration of the battery cell is effectively prevented, and thus, the life expectancy of the battery cell may be remarkably increased.
- FIG. 6 is a diagram schematically illustrating a battery pack 1 according to another embodiment of the present invention.
- the battery management apparatus 100 may be provided in the battery pack 1 . That is, the battery pack 1 according to the present invention may include the battery management apparatus 100 and one or more battery cells B described above. In addition, the battery pack 1 may further include electrical equipment (relays, fuses, etc.) and a case. The battery pack 1 may be applied to a battery storage system, a vehicle, and an energy storage system (ESS).
- ESS energy storage system
- the measurement unit 110 may be connected to the first sensing line SL1 , the second sensing line SL2 , and the third sensing line SL3 .
- the measurement unit 110 may measure the positive voltage of the battery cell B through the first sensing line SL1 and measure the negative voltage of the battery cell B through the second sensing line SL2 .
- the measurement unit 110 may measure the voltage of the battery cell B by calculating a difference between the measured positive voltage and negative voltage.
- the measurement unit 110 may be connected to the current measurement unit A through the third sensing line SL3 .
- the current measuring unit (A) may be provided on the charging/discharging path of the battery cell (B).
- the current measuring unit A may be an ammeter or a shunt resistor.
- the charging/discharging path may be a high current path through which the charging current and the discharging current of the battery cell B flow. Accordingly, the measurement unit 110 measures the current of the battery cell B through the third sensing line SL3 connected to the current measurement unit A, and measures the capacity of the battery cell B based on the measured current. can be measured
- the discharge unit 130 may include a switching element and a discharge resistor constituting a discharge path of the battery cell (B). Both ends of the discharging unit 130 may be connected to the charging/discharging path of the battery cell (B).
- one end of the discharging unit 130 may be connected to the positive side of the battery cell B in the charging/discharging path.
- the other end of the discharge unit 130 may be connected to the negative side of the battery cell (B) in the charge/discharge path.
- the switching element included in the discharge unit 130 may open or close the discharge path for the battery cell B by controlling the operation state by the controller 120 .
- the discharge unit 130 may completely discharge the battery cell B2 at the second time point T2 to an SOC of 0%.
- the measurement unit 110 may measure the second capacity Q2 of the battery cell B.
- FIG. 7 is a diagram schematically illustrating a battery management method according to another embodiment of the present invention.
- each step of the battery management method may be performed by the battery management apparatus 100 .
- the content overlapping with the previously described content will be omitted or briefly described.
- the battery management method includes a first measurement step (S100), a second measurement step (S200), a voltage deviation and capacity deviation calculation step (S300), a side reaction factor determination step (S400), and a side reaction type determination step ( S500) may be included.
- the first measuring step S100 is a step of measuring the first voltage of the battery cell B1 at a first time point T1 , and may be performed by the measuring unit 110 .
- the first time point T1 may be a time point immediately before the battery cell B1 is stored. That is, the measurement unit 110 may measure the first voltage of the battery cell B1 at a first time point T1 when the battery cell B1 starts to be stored.
- the second measuring step S200 is a step of measuring a second voltage and a second capacity of the battery cell at a second time point T2 after the first time point T1 and may be performed by the measurement unit 110 . .
- the second time point T2 may be a time point at which the storage of the battery cell B2 is completed. Similar to the process of measuring the voltage of the battery cell B1 at the first time point T1 , the measurement unit 110 may measure the voltage of the battery cell B2 at the second time point T2 .
- the controller 120 may control the discharge unit 130 to discharge the battery cell B2 .
- the measuring unit 110 measures the discharge current of the battery cell B2, and accumulates the measured discharge current to determine the second capacity corresponding to the discharge amount of the battery cell B2. can be measured
- the voltage deviation and capacity deviation calculation step ( S300 ) is a step of calculating a voltage deviation between the first voltage and the second voltage and calculating a capacity deviation between the first capacity and the second capacity corresponding to the first voltage. ) can be done by
- the controller 120 may calculate a voltage deviation by calculating the difference between the first voltage of the battery cell B1 at the first time point T1 and the second voltage of the battery cell B2 at the second time point T2. .
- the controller 120 may calculate a voltage deviation by calculating an equation of "first voltage - second voltage".
- the controller 120 may calculate the capacity deviation by calculating the difference between the first capacity of the battery cell B1 at the first time point T1 and the second capacity of the battery cell B2 at the second time point T2. .
- the control unit 120 may calculate the capacity deviation by calculating a formula of “first capacity minus second capacity”.
- the controller 120 may calculate the first capacity based on the first voltage. Specifically, the controller 120 may estimate the first SOC corresponding to the first voltage using the battery profile BP. In addition, the controller 120 may calculate the first capacity corresponding to the first voltage by using the capacity Q0 of the BOL battery cell B0 and the estimated first SOC.
- the step of determining the side reaction factor ( S400 ) is a step of determining the positive side reaction factor and the negative side reaction factor for the battery cell based on the voltage deviation and the capacity deviation, and may be performed by the controller 120 .
- the controller 120 controls the capacity deviation Qi according to the difference between the capacity Q1 of the battery cell B1 at the first time point T1 and the capacity Q2 of the battery cell B2 at the second time point T2. ) may be calculated, and the calculated capacity deviation (Qi) may be determined as a negative negative reaction factor.
- the controller 120 determines the voltage difference between the battery cells at the first time point T1 and the second time point T2.
- Voltage-based capacity can be determined as an anode side reaction factor.
- the voltage deviation means a deviation between the first voltage of the battery cell B1 at the first time point T1 and the second voltage of the battery cell B2 at the second time point T2.
- the controller 120 may calculate the voltage-based capacity by converting the voltage deviation into a capacity-related value using the battery profile BP.
- the controller 120 may determine a value obtained by subtracting the capacity deviation Qi from the voltage-based capacity as the anode side reaction factor.
- the capacity deviation Qi corresponding to the negative side reaction may be included in the voltage-based capacity. Accordingly, in order to accurately determine the anode side reaction factor, the controller 120 may determine a value obtained by subtracting the capacity deviation Qi from the voltage-based capacity as the anode side reaction factor.
- the step of determining the side reaction type ( S500 ) is a step of determining the type of the side reaction of the battery cell based on the positive side reaction factor and the negative side reaction factor, and may be performed by the controller 120 .
- the controller 120 may calculate a formula of “positive side reaction factor ⁇ negative side reaction factor” to calculate a side reaction reference value.
- the controller 120 may determine the type of side reaction of the battery cell as a positive side reaction.
- the controller 120 may determine the type of side reaction of the battery cell as a negative side reaction.
- the battery management method according to another embodiment of the present invention may further include an operating condition setting step (not shown).
- the operation condition setting step is a step of setting operating conditions for the battery cell based on the side reaction type determined for the battery cell after the side reaction type determination step S500 , and may be performed by the controller 120 .
- the controller 120 may set different operating conditions for the battery cell according to the type of side reaction of the battery cell. That is, in order to effectively prevent further deterioration of the battery cell, the controller 120 may appropriately set the operating condition of the battery cell according to the type of side reaction of the battery cell.
- the control unit 120 when it is determined that the type of side reaction of the battery cell is a positive side reaction, the control unit 120 reduces at least one of an upper limit SOC (maximum allowable SOC) and an upper limit voltage (maximum allowable voltage) for the battery cell. can be configured.
- an upper limit SOC maximum allowable SOC
- an upper limit voltage maximum allowable voltage
- control unit 120 may be configured to decrease the upper limit temperature (maximum allowable temperature) for the battery cell.
- the embodiment of the present invention described above is not implemented only through the apparatus and method, and may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded.
- the implementation can be easily implemented by those skilled in the art to which the present invention pertains from the description of the above-described embodiments.
- control unit 120 control unit
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Abstract
Description
Claims (14)
- 제1 시점에서 배터리 셀의 제1 전압을 측정하고, 상기 제1 시점 이후의 제2 시점에서 상기 배터리 셀의 제2 전압 및 제2 용량을 측정하도록 구성된 측정부; 및상기 제1 전압과 상기 제2 전압 간의 전압 편차를 산출하고, 상기 제1 전압에 대응되는 제1 용량과 상기 제2 용량 간의 용량 편차를 산출하며, 상기 전압 편차 및 상기 용량 편차에 기반하여 상기 배터리 셀에 대한 양극 부반응 인자와 음극 부반응 인자를 결정하고, 상기 양극 부반응 인자 및 상기 음극 부반응 인자에 기반하여 상기 배터리 셀의 부반응의 종류를 판단하도록 구성된 제어부를 포함하는 것을 특징으로 하는 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 배터리 셀의 SOC와 전압 간의 대응 관계를 나타내는 배터리 프로파일에 기반하여 상기 전압 편차에 대응되는 전압 기반 용량을 산출하고, 상기 제1 전압에 따라 상기 전압 기반 용량 또는 상기 전압 기반 용량 및 상기 용량 편차에 기반하여 상기 양극 부반응 인자를 결정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제2항에 있어서,상기 제어부는,상기 제1 전압에 대응되는 제1 SOC를 추정하고, 추정된 제1 SOC와 미리 설정된 기준 SOC를 비교하며, 비교 결과에 대응되도록 상기 배터리 셀의 양극 부반응 인자를 결정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제3항에 있어서,상기 제어부는,상기 제1 SOC가 상기 기준 SOC 이상인 경우, 상기 전압 기반 용량에 기반하여 상기 양극 부반응 인자를 결정하고,상기 제1 SOC가 상기 기준 SOC 미만인 경우, 상기 전압 기반 용량과 상기 산출된 용량 편차 간의 차이에 기반하여 상기 양극 부반응 인자를 결정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제3항에 있어서,상기 제어부는,상기 배터리 셀의 SOC와 상기 SOC에 대한 미분 전압 간의 대응 관계를 나타내는 미분 프로파일에서 음극 평탄 구간이 시작되는 지점의 SOC를 상기 기준 SOC로 설정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제5항에 있어서,상기 제어부는,상기 미분 프로파일에서 소정의 SOC 구간에 포함된 타겟 피크를 결정하며, 결정된 타겟 피크에 대응되는 SOC를 상기 기준 SOC로 설정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 용량 편차에 기반하여 상기 배터리 셀에 대한 음극 부반응 인자를 결정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 양극 부반응 인자와 상기 음극 부반응 인자에 기반하여 부반응 참조값을 산출하고, 산출된 부반응 참조값과 미리 설정된 부반응 기준값을 비교하며, 비교 결과에 따라 상기 배터리 셀의 부반응의 종류를 상기 양극 부반응 또는 상기 음극 부반응으로 판단하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제1항에 있어서,상기 제어부는,상기 배터리 셀에 대해 판단된 부반응의 종류에 기반하여, 상기 배터리 셀에 대한 운용 조건을 설정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제9항에 있어서,상기 제어부는,상기 배터리 셀의 부반응의 종류가 상기 양극 부반응으로 판단된 경우, 상기 배터리 셀에 대한 상한 SOC 및 상한 전압 중 적어도 하나를 감소시키고,상기 배터리 셀의 부반응의 종류가 상기 음극 부반응으로 판단된 경우, 상기 배터리 셀에 대한 상한 온도를 감소시키도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제1항에 있어서,상기 제2 시점에서 상기 배터리 셀을 방전시키도록 구성된 방전부를 더 포함하고,상기 측정부는,상기 제2 시점에서 상기 배터리 셀이 방전되는 동안 상기 배터리 셀의 방전 전류량을 측정함으로써, 상기 제2 용량을 측정하도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제1항에 있어서,상기 배터리 셀은,상기 제1 시점에서 상기 제2 시점까지 소정의 온도 이상으로 유지되도록 구성된 것을 특징으로 하는 배터리 관리 장치.
- 제1항 내지 제12항 중 어느 한 항에 따른 배터리 관리 장치를 포함하는 배터리 팩.
- 제1 시점에서 배터리 셀의 제1 전압을 측정하는 제1 측정 단계;상기 제1 시점 이후의 제2 시점에서 상기 배터리 셀의 제2 전압 및 제2 용량을 측정하는 제2 측정 단계;상기 제1 전압과 상기 제2 전압 간의 전압 편차를 산출하고, 상기 제1 전압에 대응되는 제1 용량과 상기 제2 용량 간의 용량 편차를 산출하는 전압 편차 및 용량 편차 산출 단계;상기 전압 편차 및 상기 용량 편차에 기반하여 상기 배터리 셀에 대한 양극 부반응 인자와 음극 부반응 인자를 결정하는 부반응 인자 결정 단계; 및상기 양극 부반응 인자 및 상기 음극 부반응 인자에 기반하여 상기 배터리 셀의 부반응의 종류를 판단하는 부반응 종류 판단 단계를 포함하는 것을 특징으로 하는 배터리 관리 방법.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022559440A JP7400172B2 (ja) | 2020-10-27 | 2021-10-27 | バッテリー管理装置及び方法 |
| CN202180031055.7A CN115443416B (zh) | 2020-10-27 | 2021-10-27 | 电池管理设备、电池组和电池管理方法 |
| US17/918,443 US12117501B2 (en) | 2020-10-27 | 2021-10-27 | Battery management apparatus and method |
| EP21886821.4A EP4148444B1 (en) | 2020-10-27 | 2021-10-27 | Battery management apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
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| KR20200140726 | 2020-10-27 | ||
| KR10-2020-0140726 | 2020-10-27 |
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| CN (1) | CN115443416B (ko) |
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| KR102600139B1 (ko) | 2022-07-11 | 2023-11-08 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20240037583A (ko) * | 2022-09-15 | 2024-03-22 | 주식회사 엘지에너지솔루션 | 배터리 셀 퇴화도 진단 방법 및 이를 이용하는 배터리 시스템 |
| US12578395B2 (en) | 2022-09-21 | 2026-03-17 | Lg Energy Solution, Ltd. | Apparatus and method for diagnosing state of battery |
| KR102690387B1 (ko) * | 2022-09-22 | 2024-08-05 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 그것의 동작 방법 |
| CN119816743A (zh) * | 2022-09-22 | 2025-04-11 | 株式会社Lg新能源 | 电池管理装置及其操作方法 |
| KR102896093B1 (ko) * | 2022-10-31 | 2025-12-04 | 주식회사 에스앤에스 | 배터리 자기 방전량 예측 장치 및 방법 |
| JP2025539934A (ja) * | 2022-11-15 | 2025-12-10 | エルジー エナジー ソリューション リミテッド | 電池の劣化検査装置およびその動作方法 |
| CN120418669A (zh) * | 2022-12-22 | 2025-08-01 | 株式会社Lg新能源 | 电池气体产生量预测设备及其操作方法 |
| EP4517352A1 (en) * | 2023-08-31 | 2025-03-05 | LG Energy Solution, Ltd. | Apparatus and method for diagnosing battery |
| KR102896754B1 (ko) * | 2023-08-31 | 2025-12-04 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
| KR102839921B1 (ko) * | 2023-08-31 | 2025-07-28 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
| CN116879762B (zh) * | 2023-09-06 | 2024-01-26 | 宁德时代新能源科技股份有限公司 | 电池材料损失预测模型的建立方法、预测方法及装置 |
| KR20250106953A (ko) | 2024-01-04 | 2025-07-11 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR102735196B1 (ko) * | 2024-01-31 | 2024-11-26 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
| KR102757503B1 (ko) * | 2024-02-08 | 2025-01-21 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
| KR20250143489A (ko) * | 2024-03-25 | 2025-10-02 | 주식회사 엘지에너지솔루션 | 배터리 진단 방법 및 장치 |
| KR20250162217A (ko) * | 2024-05-10 | 2025-11-18 | 주식회사 엘지에너지솔루션 | 배터리 진단 방법 및 장치 |
| CN118254628B (zh) * | 2024-05-29 | 2024-07-26 | 山西建设投资集团有限公司 | 一种基于物联网的充电桩智能运维管理系统 |
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- 2021-10-27 EP EP21886821.4A patent/EP4148444B1/en active Active
- 2021-10-27 CN CN202180031055.7A patent/CN115443416B/zh active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7400172B2 (ja) | 2023-12-19 |
| JP2023519692A (ja) | 2023-05-12 |
| CN115443416B (zh) | 2025-09-23 |
| US12117501B2 (en) | 2024-10-15 |
| KR20220056150A (ko) | 2022-05-04 |
| US20230140094A1 (en) | 2023-05-04 |
| EP4148444B1 (en) | 2026-01-21 |
| EP4148444A1 (en) | 2023-03-15 |
| CN115443416A (zh) | 2022-12-06 |
| EP4148444A4 (en) | 2024-12-11 |
| KR102688015B1 (ko) | 2024-07-24 |
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