WO2025151007A1 - 배터리 관리 장치 및 방법 - Google Patents
배터리 관리 장치 및 방법Info
- Publication number
- WO2025151007A1 WO2025151007A1 PCT/KR2025/000679 KR2025000679W WO2025151007A1 WO 2025151007 A1 WO2025151007 A1 WO 2025151007A1 KR 2025000679 W KR2025000679 W KR 2025000679W WO 2025151007 A1 WO2025151007 A1 WO 2025151007A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- profile
- value
- capacity
- battery
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- 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
- H01M10/42—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
-
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- Batteries are used in various fields, and in fields where batteries are being widely used recently, such as electric vehicles or smart grid systems, large-capacity batteries are often required.
- a battery pack In order to increase the capacity of a battery pack, there may be a method of increasing the capacity of the secondary battery, that is, the battery cell itself.
- the effect of increasing the capacity is not great, and there is a physical limitation on the size expansion of the secondary battery, and it is inconvenient to manage. Therefore, battery packs in which a number of battery cells are connected in series and parallel are usually widely used.
- FIG. 13 is a schematic drawing of a vehicle according to another embodiment of the present invention.
- FIG. 15 is a diagram schematically illustrating a condition judgment step and a status diagnosis step of a battery management method according to another embodiment of the present invention.
- the present invention provides a technology capable of diagnosing a deterioration imbalance state between a plurality of batteries included in a battery pack.
- FIG. 1 is a diagram schematically illustrating a battery management device (100) according to one embodiment of the present invention.
- the battery management device (100) may include a profile acquisition unit (110) and a diagnostic unit (120).
- the horizontal axis (X-axis) represents capacity (Ah)
- the vertical axis (Y-axis) represents voltage (V).
- the profile acquisition unit (110) may acquire a battery profile (BP) indicating a relationship between the voltage and capacity of a battery, and adjust a preset reference positive profile (Rp) and a reference negative profile (Rn) to correspond to the battery profile (BP) to acquire a positive profile (PP) and a positive participation end point (pf).
- BP battery profile
- Rp preset reference positive profile
- Rn reference negative profile
- PP positive profile
- pf positive participation end point
- the battery profile (BP) may be a profile representing the relationship between the voltage (V) and the capacity (Q) when the battery is charged.
- the battery profile (BP) may be a profile representing the relationship between the voltage (V) and the capacity (Q) when the battery is discharged.
- the reference capacity can be set based on the positive profile (PP).
- the reference capacity can be set as the positive capacity (Qp), which is the difference between the maximum capacity and the minimum capacity of the positive profile (PP).
- the reference capacity can be set as the negative capacity (Qn), which is the difference between the maximum capacity and the minimum capacity of the negative profile (NP).
- the reference capacity can be set as the battery capacity (Qb), which is the difference between the maximum capacity and the minimum capacity of the battery profile (BP).
- the reference capacity is a value representing the state of the battery, various values can be applied, not limited to the positive capacity (Qp), the negative capacity (Qn), and the battery capacity (Qb).
- the diagnostic unit (120) can calculate the SOC (State of Charge) of the first target point based on the ratio of the capacity value of the first target point to the reference capacity, and determine the calculated SOC as the target value. Specifically, the diagnostic unit (120) can calculate the SOC of the first target point by dividing the capacity value of the first target point by the reference capacity, and determine the calculated SOC as the target value.
- the capacity value of the first target point means a capacity value corresponding to the first target point on the first profile.
- the capacity value of the first target point can be the difference between the start capacity (0 [Ah] of FIG. 2) of the first profile (PP) and the capacity (50 [Ah] of FIG. 2) of the first target point (pf of FIG. 2).
- the diagnosis unit (120) may calculate the ratio between the first value (b2-b1) and the second value (b3-b2), "(b2-b1) ⁇ (b3-b2)” or "(b3-b2) ⁇ (b2-b1)", and may determine whether the distribution profile satisfies a predetermined condition based on the calculation result.
- the first value is 1.8% (11.9-10.1) and the second value is 17.3% (29.2-11.9).
- the ratio between the first value and the second value is 9.61 (17.3 ⁇ 1.8) or 0.10 (1.8 ⁇ 17.3).
- the diagnostic unit (120) can determine that the distribution profile satisfies a predetermined condition. Alternatively, if the calculated ratio does not fall within the critical ratio range, the diagnostic unit (120) can be configured to determine that the distribution profile satisfies a predetermined condition.
- the diagnostic unit (120) can determine that the calculated ratio belongs to the critical ratio interval. Then, the diagnostic unit (120) can determine that the distribution profile satisfies a predetermined condition. Conversely, if the ratio between the first value and the second value is less than the lower limit or exceeds the upper limit, the diagnostic unit (120) can determine that the ratio does not belong to the critical ratio interval. Then, the diagnostic unit (120) can determine that the distribution profile does not satisfy a predetermined condition.
- the lower limit of the critical ratio interval is set to 3 ⁇ 7, and the upper limit is preset to 7 ⁇ 3.
- the diagnosis unit (120) can determine that the first distribution profile (p1) satisfies a predetermined condition.
- the diagnostic unit (120) calculates the anode loss rate based on the SOC of the first target point and determines the anode loss rate as the target value.
- the diagnostic unit (120) can calculate the bipolar loss rate through the following calculation process.
- the diagnostic unit (120) can calculate the first difference, which is the difference between the first reference value and the second reference value.
- the diagnostic unit (120) can calculate the second difference, which is the difference between the SOC of the first target point and the first reference value.
- the diagnostic unit (120) can calculate the bipolar loss rate by calculating the ratio of the second difference to the first difference.
- the first reference value can be preset as the SOC of the reference participation end point.
- the SOC of the reference participation end point can be calculated by dividing the capacity value of the reference participation end point by the reference capacity for the battery in the BOL state.
- the second reference value can be preset as the SOC of the reference participation start point. That is, the SOC of the reference participation start point can be preset as the capacity value of the reference participation start point divided by the reference capacity for the battery in the BOL state.
- the diagnostic unit (120) can calculate the bipolar loss rate using Equation 1 below.
- L P is the anode loss ratio
- pf MOL represents the SOC of the first target point
- pi BOL represents the SOC of the anode participation start point of the anode profile obtained for the battery in the BOL state
- pf BOL represents the SOC of the anode participation end point of the anode profile obtained for the battery in the BOL state.
- MOL Middle of Life
- the reference engagement endpoint may include the positive engagement onset point of the positive profile obtained for the battery in the BOL state and the negative engagement endpoint of the negative profile obtained for the battery in the BOL state.
- the reference engagement onset point may be the negative engagement onset point of the negative profile obtained for the battery in the BOL state.
- the diagnostic unit (120) can calculate the bipolar loss rate using Equation 2 below.
- the diagnostic unit (120) calculates a capacity loss rate based on the SOC of the first target point and the SOC of the second target point, and determines the capacity loss rate as a target value.
- the diagnostic unit (120) may be configured to determine a target value based on a reference capacity set for each of a plurality of batteries, a first target point, and a second target point included in each of a plurality of first profiles.
- the reference capacity can be set as the positive electrode capacity (Qp), the negative electrode capacity (Qn), or the battery capacity (Qb).
- the reference capacity is a value representing the state of the battery, various values can be applied, and are not limited to the positive electrode capacity (Qp), the negative electrode capacity (Qn), and the battery capacity (Qb).
- the diagnostic unit (120) may be configured to calculate the SOC of the first target point based on the ratio of the capacity value of the first target point to the reference capacity, calculate the SOC of the second target point based on the ratio of the capacity value of the second target point to the reference capacity, calculate the capacity loss rate based on the first reference value and the second reference value preset for each of a plurality of batteries and the SOC of the first target point and the SOC of the second target point, and determine the calculated capacity loss rate as the target value.
- the capacity loss rate means the capacity of the battery at the time of diagnosis compared to the capacity of the battery in the BOL state.
- the reference engagement end point may be the positive engagement end point of the positive profile obtained for the battery in the BOL state
- the reference engagement start point may be the positive engagement start point of the positive profile obtained for the battery in the BOL state
- the diagnostic unit (120) can calculate the capacity loss rate using Equation 3 below.
- L Q is the capacity loss rate
- pf MOL represents the SOC of the first target point
- pi MOL represents the SOC of the second target point
- pi BOL represents the SOC of the positive engagement start point of the positive profile obtained for the battery in the BOL state
- pf BOL represents the SOC of the positive engagement end point of the positive profile obtained for the battery in the BOL state.
- L Q is the capacity loss rate
- pf MOL represents the SOC of the first target point
- pi MOL represents the SOC of the second target point
- nf BOL represents the SOC of the negative participation end point of the negative profile obtained for the battery in the BOL state
- ni BOL represents the SOC of the negative participation start point of the negative profile obtained for the battery in the BOL state.
- the capacity loss rate (L Q ) calculated using Equation 3 and the capacity loss rate (L Q ) calculated using Equation 4 are the same.
- “pf BOL -pi BOL” and "nf BOL -ni BOL” have the same value.
- the difference between pf BOL and pi BOL and the difference between nf BOL and nf BOL correspond to the capacity (Qb) of the battery, so the capacity loss rates (L Q ) calculated using Equations 3 and 4 are the same.
- the battery management device (100) can diagnose whether a battery pack is deteriorated or not in terms of the degree of capacity loss by calculating a capacity loss rate, which indicates the state of deterioration of the battery, as a target value.
- the profile acquisition unit (110) determines a bipolar profile (PP) is described.
- FIG. 5 is a diagram schematically illustrating a reference anode profile (Rp) and a reference cathode profile (Rn) according to one embodiment of the present invention.
- the horizontal axis (X-axis) represents capacity (Ah) and the vertical axis (Y-axis) represents voltage (V).
- FIGS. 6 to 8 are drawings for reference in explaining an example of a procedure for generating a comparison profile (S) used for comparison with a battery profile (BP) according to one embodiment of the present invention.
- the generation procedure of the comparison profile (S) to be described with reference to FIGS. 6 to 8 is performed in the order of a first routine (see FIG. 6) for setting four points (positive participation start point (pi), positive participation end point (pf), negative participation start point (ni), and negative participation end point (nf)) to correspond to a voltage range of interest, a second routine (see FIG. 7) for performing profile shifting, and a third routine (see FIG. 8) for performing capacity scaling. That is, the generation procedure of the comparison profile (S) according to one embodiment of the present invention includes the first to third routines.
- the positive electrode participation initiation point (pi) refers to the positive electrode point where the reaction starts during the charging process or the positive electrode point where the reaction ends during the discharging process.
- the positive electrode participation end point (pf) refers to the positive electrode point where the reaction ends during the charging process or the positive electrode point where the reaction starts during the discharging process.
- the negative electrode participation initiation point (ni) refers to the negative electrode point where the reaction starts during the charging process or the negative electrode point where the reaction ends during the discharging process.
- the negative electrode participation end point (nf) refers to the negative electrode point where the reaction ends during the charging process or the negative electrode point where the reaction starts during the discharging process.
- the reference anode profile (Rp) and the reference cathode profile (Rn) are the same as those shown in Fig. 5.
- the profile acquisition unit (110) determines the positive participation start point (pi), the positive participation end point (pf), the negative participation start point (ni), and the negative participation end point (nf) on the reference positive profile (Rp) and the reference negative profile (Rn).
- the difference between the voltage of the positive engagement initiation point (pi) and the voltage of the negative engagement initiation point (ni) can be set equal to the starting voltage (lowest voltage) of the battery profile (BP).
- the profile acquisition unit (110) may divide the negative voltage range from the start point to the end point of the reference negative profile (Rn) into a plurality of micro-voltage sections of a predetermined size, and then set the boundary point of two adjacent micro-voltage sections among the plurality of micro-voltage sections as the negative participation start point (ni). Then, the profile acquisition unit (110) may set a point that exists on the reference positive profile (Rp) and is greater than the voltage of the negative participation start point (ni) by a first set voltage as the positive participation start point (pi).
- the profile acquisition unit (110) may divide the anode voltage range from the second set voltage to the end point of the reference anode profile (Rp) into a plurality of micro-voltage sections of a predetermined size, and then set the boundary point of two adjacent micro-voltage sections among the plurality of micro-voltage sections as the anode participation end point (pf). Then, the profile acquisition unit (110) may set the point that exists on the reference cathode profile (Rn) and is smaller than the voltage of the anode participation end point (pf) by the second set voltage (e.g., 4 V) as the cathode participation end point (nf).
- the second set voltage e.g., 4 V
- the profile acquisition unit (110) shifts at least one of the reference positive profile (Rp) and the reference negative profile (Rn) to the left or right along the horizontal axis.
- the profile acquisition unit (110) may shift the reference anode profile (Rp) to the left (low capacity side), shift the reference cathode profile (Rn) to the right (high capacity side), or perform both, so that the capacity values of the anode participation start point (pi) and the cathode participation start point (ni) match.
- Fig. 7 illustrates a situation in which the capacity value of the positive participation start point (pi') matches the capacity value of the negative participation start point (ni) as a result of generating an adjusted positive participation profile (Rp') by shifting only the reference positive participation profile (Rp) to the left.
- the adjusted positive participation profile (Rp') is the result of applying an adjustment procedure for shifting to the left the amount of the difference in capacity between the positive participation start point (pi) and the negative participation start point (ni) to the reference positive participation profile (Rp). Therefore, the two points (pi, pi') differ only in capacity value, and have the same voltage.
- the two points (pf, pf') differ only in capacity value, and have the same voltage.
- the profile acquisition unit (110) scales the capacity range of at least one of the adjustment result profiles (Rp', Rn).
- the profile acquisition unit (110) can generate the adjusted positive electrode profile (Rp') by shrinking or expanding the adjusted positive electrode profile (Rp') so that the capacity range between the two points (pi', pf') of the adjusted positive electrode profile (Rp') matches the capacity range of the battery profile (BP).
- the capacity range between the two points (pi', pf'') of the adjusted positive electrode profile (Rp'') can match the capacity range of the battery profile (BP).
- the positive participation end point (pf'') on the adjusted positive profile (Rp'') corresponds to the positive participation end point (pf') on the adjusted positive profile (Rp').
- the negative participation end point (nf') on the adjusted negative profile (Rn') corresponds to the negative participation end point (nf) on the reference negative profile (Rn).
- the capacity range between the positive participation start point (pi') and the positive participation end point (pf'') of the regulated positive profile (Rp'') matches the capacity range of the battery profile (BP).
- the capacity range between the negative participation start point (ni) and the negative participation end point (nf') of the regulated negative profile (Rn') matches the capacity range of the battery profile (BP).
- the profile acquisition unit (110) can calculate the error (profile error) between the comparison profile (S) and the battery profile (BP).
- the profile acquisition unit (110) can record in the storage unit (130) at least two of the adjusted positive profile (Rp''), the adjusted negative profile (Rn'), the positive participation start point (pi'), the positive participation end point (pf''), the negative participation start point (ni), the negative participation end point (nf'), the first scale factor, the second scale factor, the comparison profile (S), and the profile error by mutually mapping them.
- the first scale factor can represent the ratio of the capacity difference between the two points (pi', pf'') to the capacity difference between the two points (pi0, pf0).
- the second scale factor can represent the ratio of the capacity difference between the two points (ni, nf') to the capacity difference between the two points (ni0, nf0).
- the profile acquisition unit (110) can determine the first scale factor as the positive change rate (ps) and the second scale factor as the negative change rate (ns).
- the adjusted reference positive electrode profile (Rp'') can be used as the positive electrode profile (PP).
- the profile acquisition unit (110) may set a point on the adjusted negative profile (Rn') that has a capacity value that is smaller by the size of the capacity range of the battery profile (BP) than the capacity value of the negative participation end point (nf') as the negative participation start point (ni').
- the profile acquisition unit (110) may search for a point that is higher by a second set voltage than the voltage of the negative participation end point (nf') from the adjusted positive profile (Rp') and set the searched point as the positive participation end point (pf').
- the profile acquisition unit (110) may set a point on the adjusted positive profile (Rp') that has a capacity value that is smaller by the size of the capacity range of the battery profile (BP) than the capacity value of the positive participation end point (pf') as the positive participation start point (pi').
- the profile acquisition unit (110) can shift at least one of the adjusted positive profile (Rp') and the adjusted negative profile (Rn') to the left or right along the horizontal axis so that the capacity values of the positive participation start point (pi') and the negative participation start point (ni') match, or so that the capacity values of the positive participation end point (pf') and the negative participation end point (nf') match.
- the profile acquisition unit (110) can calculate the error (profile error) between the comparison profile (U) and the battery profile (BP).
- the profile acquisition unit (110) can mutually map at least two of the adjusted positive profile (Rp'), the adjusted negative profile (Rn''), the positive participation start point (pi'), the positive participation end point (pf'), the negative participation start point (ni''), the negative participation end point (nf''), the first scale factor, the second scale factor, the comparison profile (U), and the profile error, and record them in the storage unit (130).
- the profile acquisition unit (110) can calculate an anode change ratio (ps) based on the reference anode profile (Rp) and the adjusted anode profile (Rp').
- the anode change ratio (ps) means a ratio by which the adjusted anode profile is changed with respect to the reference anode profile.
- the profile acquisition unit (110) can calculate an anode change ratio (ns) based on the reference cathode profile (Rn) and the adjusted anode profile (Rn'').
- the cathode change ratio (ns) means a ratio by which the adjusted cathode profile is changed with respect to the reference cathode profile.
- the adjusted reference positive electrode profile (Rp') can be used as the positive electrode profile (PP).
- the battery management device (100) according to the present invention can be applied to a BMS (Battery Management System). That is, the BMS according to the present invention can include the battery management device (100) described above. In this configuration, at least some of the components of the battery management device (100) can be implemented by supplementing or adding the functions of the components included in the conventional BMS. For example, the profile acquisition unit (110), the diagnosis unit (120), and the storage unit (130) of the battery management device (100) can be implemented as components of the BMS.
- the battery management device (100) according to the present invention may be equipped in a battery pack. That is, the battery pack according to the present invention may include the battery management device (100) described above and one or more batteries. In addition, the battery pack may further include electrical components (relays, fuses, etc.) and a case, etc.
- FIG. 12 is a drawing illustrating an exemplary configuration of a battery pack (10) according to another embodiment of the present invention.
- the first profile is a bipolar profile
- the first target point included in the first profile may be a bipolar participation end point included in the bipolar profile.
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Abstract
Description
Claims (20)
- 배터리 팩에 포함된 복수의 배터리 각각에 대한 제1 프로파일을 획득하도록 구성된 프로파일 획득부; 및복수의 제1 프로파일 각각에 포함된 제1 타겟점에 기반하여 상기 복수의 배터리 각각에 대해 용량값에 기반한 타겟값을 진단 인자로서 산출하고, 산출된 복수의 타겟값과 상기 복수의 타겟값 각각에 대한 개수 간의 대응 관계를 나타내는 분포 프로파일을 생성하며, 상기 분포 프로파일이 소정의 조건을 만족하는지 판정하고, 판정 결과에 따라 상기 배터리 팩의 상태를 진단하는 진단부를 포함하는 배터리 관리 장치.
- 제1항에 있어서,상기 제1 프로파일은 양극 프로파일이고,상기 제1 타겟점은 상기 양극 프로파일에서 충전 반응이 종료되거나 방전 반응이 시작되는 양극 지점을 나타내는 양극 참여 종료점인 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 분포 프로파일이 상기 소정의 조건을 만족하지 않는 경우, 상기 배터리 팩의 상태를 퇴화 불균형 상태로 진단하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 분포 프로파일이 상기 소정의 조건을 만족하는 경우, 상기 분포 프로파일의 특징값을 미리 설정된 임계값과 비교하고, 비교 결과에 기반하여 상기 배터리 팩의 상태를 진단하도록 구성된 배터리 관리 장치.
- 제4항에 있어서,상기 진단부는,상기 특징값이 상기 임계값을 초과하면, 상기 배터리 팩의 상태를 퇴화 불균형 상태로 진단하고,상기 특징값이 상기 임계값 이하이면, 상기 배터리 팩의 상태를 퇴화 균형 상태로 진단하도록 구성된 배터리 관리 장치.
- 제4항에 있어서,상기 진단부는,상기 배터리 팩의 퇴화도와 미리 설정된 참조 특징값에 기반하여 상기 임계값을 설정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 복수의 타겟값에 기반하여 제1 값 및 제2 값을 산출하고, 상기 제1 값과 상기 제2 값 간의 비율에 따라 상기 분포 프로파일이 상기 소정의 조건을 만족하는지를 판단하도록 구성된 배터리 관리 장치.
- 제7항에 있어서,상기 진단부는,상기 복수의 타겟값 중에서 최소값, 최대값 및 기준값을 결정하고, 상기 최소값과 상기 기준값 간의 차이를 상기 제1 값으로 산출하며, 상기 기준값과 상기 최대값 간의 차이를 상기 제2 값으로 산출하도록 구성된 배터리 관리 장치.
- 제8항에 있어서,상기 진단부는,상기 복수의 타겟값 중에서 대응되는 개수가 가장 큰 타겟값을 상기 기준값으로 결정하도록 구성된 배터리 관리 장치.
- 제7항에 있어서,상기 진단부는,상기 비율이 미리 설정된 임계 비율 구간에 속하는 경우, 상기 분포 프로파일이 상기 소정의 조건을 만족하는 것으로 판단하고,상기 비율이 상기 임계 비율 구간에 속하지 않는 경우, 상기 분포 프로파일이 상기 소정의 조건을 만족하는 것으로 판단하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 복수의 배터리 각각에 대해 설정된 기준 용량에 대한 상기 제1 타겟점의 용량값의 비율에 기반하여 상기 제1 타겟점의 SOC를 산출하고, 산출된 SOC를 상기 타겟값으로 결정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 복수의 배터리 각각에 대해 설정된 기준 용량에 대한 상기 제1 타겟점의 용량값의 비율에 기반하여 상기 제1 타겟점의 SOC를 산출하고, 상기 복수의 배터리마다 미리 설정된 제1 참조값 및 제2 참조값과 상기 산출된 SOC에 기반하여 양극 손실률을 산출하고, 산출된 양극 손실률을 상기 타겟값으로 결정하도록 구성된 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 복수의 배터리 각각에 대해 설정된 기준 용량, 상기 제1 타겟점 및 상기 복수의 제1 프로파일 각각에 포함된 제2 타겟점에 기반하여 상기 타겟값을 결정하도록 구성된 배터리 관리 장치.
- 제13항에 있어서,상기 제1 프로파일은 양극 프로파일이고,상기 제2 타겟점은 상기 양극 프로파일에 포함된 양극 참여 개시점인 배터리 관리 장치.
- 제1항에 있어서,상기 진단부는,상기 배터리 팩의 상태가 퇴화 불균형 상태로 진단될 경우 퇴화 불균형을 해소하기 위한 기능을 작동시키거나, 알람을 출력하는 배터리 관리 장치.
- 제15항에 있어서,상기 퇴화 불균형을 해소하기 위한 기능은 팩 밸런싱(pack balancing) 기능인 배터리 관리 장치.
- 제1항 내지 제16항 중 어느 한 항에 따른 배터리 관리 장치를 포함하는 배터리 팩.
- 제1항 내지 제16항 중 어느 한 항에 따른 배터리 관리 장치를 포함하는 자동차.
- 배터리 팩에 포함된 복수의 배터리 각각에 대한 제1 프로파일을 획득하는 프로파일 획득 단계;복수의 제1 프로파일 각각에 포함된 제1 타겟점에 기반하여 상기 복수의 배터리 각각에 대해 용량값에 기반한 타겟값을 진단 인자로서 산출하는 타겟값 산출 단계;산출된 복수의 타겟값과 상기 복수의 타겟값 각각에 대해 개수 간의 대응 관계를 나타내는 분포 프로파일을 생성하는 프로파일 생성 단계;상기 분포 프로파일이 소정의 조건을 만족하는지 판정하는 조건 판정 단계; 및판정 결과에 따라 상기 배터리 팩의 상태를 진단하는 상태 진단 단계를 포함하는 배터리 관리 방법.
- 배터리 팩에 포함된 복수의 배터리 각각에 대한 제1 프로파일을 획득하는 프로파일 획득 단계;복수의 제1 프로파일 각각에 포함된 제1 타겟점에 기반하여 상기 복수의 배터리 각각에 대해 용량값에 기반한 타겟값을 진단 인자로서 산출하는 타겟값 산출 단계;산출된 복수의 타겟값과 상기 복수의 타겟값 각각에 대한 개수 간의 대응 관계를 나타내는 분포 프로파일을 생성하는 프로파일 생성 단계;상기 분포 프로파일이 소정의 조건을 만족하는지 판정하는 조건 판정 단계; 및판정 결과에 따라 상기 배터리 팩의 상태를 진단하는 상태 진단 단계를 포함하는 배터리 관리 방법을 실행하기 위한 프로그램이 저장된 비일시적 판독 가능한 저장 매체.
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| KR20220102472A (ko) * | 2021-01-13 | 2022-07-20 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20230136998A (ko) * | 2022-03-21 | 2023-10-04 | 한국에너지기술연구원 | 불균형도 기반 배터리 상태 판단 방법 및 전자 장치 |
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| KR102738216B1 (ko) * | 2020-11-13 | 2024-12-03 | 주식회사 엘지에너지솔루션 | 배터리 진단 장치 및 방법 |
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| KR20240005656A (ko) | 2016-01-22 | 2024-01-12 | 삼성디스플레이 주식회사 | 표시 장치 |
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| KR20220102472A (ko) * | 2021-01-13 | 2022-07-20 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20230136998A (ko) * | 2022-03-21 | 2023-10-04 | 한국에너지기술연구원 | 불균형도 기반 배터리 상태 판단 방법 및 전자 장치 |
| KR20230167249A (ko) * | 2022-05-31 | 2023-12-08 | 에스케이이노베이션 주식회사 | 배터리의 이상 감지 방법 및 이를 실행하는 배터리 관리 시스템 |
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| US20250231251A1 (en) | 2025-07-17 |
| MX2026002027A (es) | 2026-04-01 |
| KR102895834B1 (ko) | 2025-12-04 |
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