WO2024048981A1 - 이상 배터리 검출 장치 및 방법 - Google Patents
이상 배터리 검출 장치 및 방법 Download PDFInfo
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- WO2024048981A1 WO2024048981A1 PCT/KR2023/009914 KR2023009914W WO2024048981A1 WO 2024048981 A1 WO2024048981 A1 WO 2024048981A1 KR 2023009914 W KR2023009914 W KR 2023009914W WO 2024048981 A1 WO2024048981 A1 WO 2024048981A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- 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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- 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
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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
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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 an apparatus and method for detecting a defective battery, and more specifically, to an apparatus and method for detecting a defective battery among a plurality of batteries using correlation analysis.
- Secondary batteries are batteries that can be reused by charging even after discharge, and can be used as an energy source for small devices such as portable phones, tablet PCs, and vacuum cleaners, and as an energy source for medium to large devices such as automobiles and ESS (Energy Storage System) for smart grids. It is also used as a
- Secondary batteries are applied to the system in the form of an assembly such as a battery module in which multiple battery cells are connected in series or parallel, or a battery pack in which battery modules are connected in series or parallel, depending on the requirements of the system.
- a high-capacity battery system with multiple battery packs connected in parallel can be applied to meet the required capacity of the device.
- the purpose of the present invention to solve the above problems is to provide an abnormal battery detection device with improved detection accuracy.
- Another object of the present invention to solve the above problems is to provide a method for detecting a defective battery using such a defective battery detection device.
- a faulty battery detection device for achieving the above object is a faulty battery detection device that detects a faulty battery among a plurality of batteries, and includes at least one processor; It includes a memory that stores at least one instruction executed through the at least one processor.
- the at least one command includes: a command to collect status data for each of a plurality of batteries; A command for performing correlation analysis between battery states based on the collected state data and calculating a correlation coefficient for each of the batteries; and a command for detecting an abnormal battery among a plurality of batteries based on the calculated correlation coefficient.
- the command for calculating the correlation coefficient for each of the batteries includes a command for calculating the correlation coefficient for each of the batteries using a correlation analysis model defined based on the standard deviation and covariance of the battery state value. It can be included.
- the command for calculating the correlation coefficient for each of the batteries is a command for calculating the correlation coefficient in which the influence of the sensing noise of the condition measurement sensor is removed using a correlation analysis model reflecting a predefined noise constant. It can be included.
- the noise constant may be defined based on the measurement error value of the state measurement sensor.
- the command for calculating the correlation coefficient for each of the batteries includes a first correlation analysis model defined based on the standard deviation and covariance of the battery state value, and the first correlation analysis model, and sensing of the state measurement sensor. It may include a command for calculating a correlation coefficient for each of the batteries using one of the second correlation analysis models reflecting a noise constant to remove the influence of noise.
- the command for calculating the correlation coefficient for each of the batteries includes a command for checking the operation mode of the batteries; And when in charge/discharge mode, the correlation coefficient may be calculated using the first correlation analysis model, and when in rest mode, the correlation coefficient may be calculated using the second correlation analysis model.
- the command for calculating the correlation coefficient for each of the batteries includes: a command for calculating the covariance of the battery state value and the covariance of the noise component value; and if the covariance of the battery state value exceeds the covariance of the noise component value, a correlation coefficient is calculated using the first correlation analysis model, and if the covariance of the battery state value is less than or equal to the covariance of the noise component value, A command for calculating a correlation coefficient using a second correlation analysis model may be included.
- the command for detecting an abnormal battery among the plurality of batteries may include a command for determining a battery with a correlation coefficient less than or equal to a predefined threshold as an abnormal battery.
- the command for collecting the status data may include a command for collecting one or more of a voltage value and a current value for each of the batteries per unit time.
- a faulty battery detection method for achieving the above other object is a faulty battery detection method by a faulty battery detection device that detects a faulty battery among a plurality of batteries, and detects a faulty battery for each of the plurality of batteries. collecting status data; Based on the collected state data, performing correlation analysis between battery states to calculate a correlation coefficient for each of the batteries; and detecting an abnormal battery among the plurality of batteries based on the calculated correlation coefficient.
- the step of calculating the correlation coefficient for each of the batteries includes calculating the correlation coefficient for each of the batteries using a correlation analysis model defined based on the standard deviation and covariance of the battery state value. It can be included.
- the step of calculating the correlation coefficient for each of the batteries may include calculating a correlation coefficient in which the influence of the sensing noise of the condition measurement sensor is removed using a correlation analysis model reflecting a predefined noise constant. there is.
- the noise constant may be defined based on the measurement error value of the state measurement sensor.
- the step of calculating the correlation coefficient for each of the batteries includes: a first correlation analysis model defined based on the standard deviation and covariance of the battery state value, and sensing of the state measurement sensor in the first correlation analysis model. It may include calculating a correlation coefficient for each of the batteries using one of a second correlation analysis model reflecting a noise constant to remove the influence of noise.
- Calculating the correlation coefficient for each of the batteries includes checking the operation mode of the batteries; And when in charge/discharge mode, calculating a correlation coefficient using the first correlation analysis model, and when in rest mode, calculating a correlation coefficient using the second correlation analysis model.
- Calculating a correlation coefficient for each of the batteries includes calculating a covariance of a battery state value and a covariance of a noise component value; and if the covariance of the battery state value exceeds the covariance of the noise component value, a correlation coefficient is calculated using the first correlation analysis model, and if the covariance of the battery state value is less than or equal to the covariance of the noise component value, It may include calculating a correlation coefficient using a second correlation analysis model.
- Detecting an abnormal battery among the plurality of batteries may include determining a battery having a correlation coefficient less than or equal to a predefined threshold as an abnormal battery.
- Collecting the status data may include collecting one or more of a voltage value and a current value for each of the batteries per unit time.
- a defective battery can be detected more accurately by detecting a defective battery based on a correlation coefficient derived using a correlation analysis model.
- 1 is an operation flowchart of a method for detecting a defective battery according to the prior art.
- Figure 2 is an example of misdiagnosis by a defective battery detection method according to the prior art.
- Figure 3 is a block diagram showing a defective battery detection system according to an embodiment of the present invention.
- Figure 4 is an operation flowchart of a method for detecting a defective battery according to an embodiment of the present invention.
- Figure 5 is an operation flowchart of a method for deriving a correlation coefficient according to an embodiment of the present invention.
- Figure 6 is an operation flowchart of a method for deriving a correlation coefficient according to an embodiment of the present invention.
- Figure 6 is an operation flowchart of a method for deriving a correlation coefficient according to another embodiment of the present invention.
- Figure 11 is a block diagram of an abnormal battery detection device according to an embodiment of the present invention.
- first, second, A, B, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.
- a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention.
- the term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.
- a battery cell is the smallest unit that stores power, and a battery module refers to an assembly of multiple battery cells electrically connected.
- a battery pack or battery rack refers to a system with a minimal single structure that electrically connects module units set by the battery manufacturer and can be monitored and controlled through a BMS, including multiple battery modules and one BPU or protection device. It can be configured.
- a battery bank may refer to a large-scale battery rack system set by connecting a plurality of battery racks in parallel. Monitoring and control of the rack BMS (RBMS) at the battery rack level can be performed through the BMS at the battery bank level.
- RBMS rack BMS
- a battery assembly refers to an assembly that includes a plurality of electrically connected battery cells and is applied to a specific system or device to function as a power source.
- the battery assembly may mean a battery module, battery pack, battery rack, or battery bank, but the scope of the present invention is not limited to these entities.
- 1 is an operation flowchart of a method for detecting a defective battery according to the prior art.
- a method for detecting a faulty battery is a method of detecting a faulty battery among a plurality of batteries by using deviations in state values of the batteries. More specifically, the abnormal battery detection device collects status data on batteries included in the battery assembly (S110). Thereafter, the abnormal battery detection device derives the deviation of the state value for each battery based on the collected state data (S120). Thereafter, the abnormal battery detection device detects a battery in which the deviation of the derived state value exceeds a predefined threshold as an abnormal battery (S130).
- Figure 2 is an example of misdiagnosis by a defective battery detection method according to the prior art.
- FIG. 2(A) shows voltage values of batteries measured per unit time
- FIG. 2(B) shows abnormality diagnosis results based on voltage differences between battery cells.
- the present invention was made to solve the problems caused by the prior art, and relates to an apparatus and method for detecting a defective battery that can improve the detection accuracy of a defective battery by preventing misdiagnosis due to factors other than failure. .
- Figure 3 is a block diagram showing a defective battery detection system according to an embodiment of the present invention.
- the defective battery detection system includes a battery assembly 100 including a plurality of batteries 10 and a defective battery detection device 200.
- a plurality of batteries 10 may be electrically connected to form a battery assembly 100 .
- the abnormal battery detection system according to an embodiment of the present invention may be included and implemented in an electric vehicle, but the scope of the present invention is not limited to these entities. That is, the defective battery detection system according to the present invention can be applied to a device equipped with a plurality of batteries and operate to detect a defective battery by performing the defective battery detection method described below.
- the abnormal battery detection device 200 may be implemented by being included in a BMS located inside the battery system.
- the abnormal battery detection device 200 may collect status data for each of a plurality of batteries.
- the state data may correspond to data about one or more state values of the voltage value and current value of the battery.
- the abnormal battery detection device 200 may receive state data from a state measurement sensor that measures state values for each battery.
- the abnormal battery detection device 200 may receive status data from a voltage measurement sensor that senses the voltage value of each of the batteries, or a current measurement sensor that senses the current value flowing through each of the batteries.
- the abnormal battery detection device 200 may collect status data at each predefined unit time.
- the abnormal battery detection device 200 may be configured to receive status data for each battery every second.
- the abnormal battery detection apparatus 200 may perform correlation analysis between battery states based on the collected state data and calculate a correlation coefficient for each of the batteries. Thereafter, the abnormal battery detection device 200 may detect a faulty battery among the plurality of batteries based on the calculated correlation coefficient. Here, the abnormal battery detection device 200 may determine a battery with a correlation coefficient less than or equal to a predefined threshold as an abnormal battery.
- the defective battery detection device can detect a defective battery based on the state values of batteries operating under the same conditions.
- a method for detecting a defective battery based on the voltage values of batteries connected in parallel in a battery assembly will be described as an example, but the scope of the present invention is not limited thereto.
- Figure 4 is an operation flowchart of a method for detecting a defective battery according to an embodiment of the present invention.
- the abnormal battery detection device 200 may collect status data for each of the plurality of batteries (S410).
- the abnormal battery detection device 200 may collect status data on one or more of the voltage value and current value for each battery per unit time.
- the abnormal battery detection apparatus 200 may perform correlation analysis between battery states based on the collected state data and calculate a correlation coefficient (r) for each of the batteries (S420).
- the abnormal battery detection apparatus 200 may calculate a correlation coefficient for each battery using a predefined correlation analysis model.
- the correlation analysis model may be defined so that when state data for a plurality of batteries is input, a correlation coefficient for each of the batteries is output.
- the correlation analysis model (hereinafter, first correlation analysis model) according to the first embodiment of the present invention may be defined based on the standard deviation and covariance of the battery state value.
- the first correlation analysis model may be defined based on Equation 1 below.
- r _ means the standard deviation of the state value of battery Y.
- x is the state value of battery X
- ⁇ x is the average value of the state value of battery It means the average value for the value.
- the state data for the battery (Cell_1) is input as x, and the state data for other batteries are input to the correlation analysis model. It can be entered as y.
- y may correspond to the average value or median value of the state values of other batteries.
- the abnormal battery detection device 200 corrects the median value of the state values of other batteries according to a predefined process, and enters the corrected median value as y in the correlation analysis model. You can enter it.
- the correlation coefficient when the change in voltage value ( ⁇ , the correlation coefficient can be calculated as the same value as the correlation coefficient according to equation 1, as shown in equation 2 below.
- the abnormal battery detection device 200 calculates a correlation coefficient using a first correlation analysis model defined based on Equation 1, and detects a faulty battery using the calculated correlation coefficient, thereby detecting the open circuit voltage (OCV) or Misdiagnosis due to the influence of internal resistance (IR) can be prevented.
- OCV open circuit voltage
- IR internal resistance
- the abnormal battery detection device 200 may calculate a correlation coefficient for each of the batteries using a correlation analysis model (hereinafter, second correlation analysis model) according to the second embodiment of the present invention.
- the second correlation analysis model may be defined based on the standard deviation, covariance, and noise constant of the battery state value.
- the correlation analysis model can be defined based on Equation 3 below.
- N refers to the noise constant and can be defined as Equation 4 below.
- N a * RMS(Noise)
- RMS Noise
- RMS Root Mean Square
- the second correlation analysis model is a model in which a noise constant (N) to remove the influence of sensing noise of the state measurement sensor is reflected in the first correlation analysis model.
- Equation 1 can be expressed as follows.
- N means the noise component of x
- M means the noise component of y
- cas1 is a case where the amount of change in the intrinsic state value is greater than the noise component, and may correspond, for example, to the charging/discharging section of the battery.
- Case 1 since the amount of change in the intrinsic state value is larger than the noise component, the influence of the sensing noise of the state measurement sensor is small, and even if the correlation coefficient is calculated using the first correlation analysis model, the detection accuracy is not significantly reduced.
- Case 2 is a case where the amount of change in the eigenstate value is less than or equal to the noise component, and may correspond, for example, to the idle period of the battery.
- the noise component since the noise component is larger than the change in the eigenstate value, when calculating the correlation coefficient using the first correlation analysis model, misdiagnosis may occur due to the influence of sensing noise.
- Equation 6 Equation 6
- the noise constant N can be defined as RMS (Noise) multiplied by the weighting coefficient a, according to Equation 4.
- the noise constant N can be defined as the RMS value of 5 mV, which is the measurement error value of the voltage sensor, multiplied by a weighting factor of 0.8.
- the weighting coefficient a is a value for adjusting detection accuracy and can be defined as a specific value between 0.2 and 1.1, and preferably, a specific value between 0.8 and 1.0.
- the abnormal battery detection device 200 may calculate the correlation coefficient using a second correlation analysis model defined based on Equation 3 in case 2 (e.g., idle mode), but in case 1 (e.g., idle mode) , charge/discharge mode), the correlation coefficient may be calculated using a second correlation analysis model in order to achieve higher detection accuracy.
- a second correlation analysis model defined based on Equation 3 in case 2 (e.g., idle mode), but in case 1 (e.g., idle mode) , charge/discharge mode)
- the correlation coefficient may be calculated using a second correlation analysis model in order to achieve higher detection accuracy.
- the abnormal battery detection apparatus 200 may compare the correlation coefficient (r) for each battery calculated in step S420 with a predefined threshold (r_th) (S430).
- the correlation coefficient (r) indicates the degree to which the state of a specific battery is correlated with the state of other batteries, and can be calculated as a specific value between -1 and 1.
- a battery with a correlation coefficient (r) close to 1 can be considered to have high correlation with other batteries, and a battery with a correlation coefficient (r) close to 0 can be viewed as having low correlation with other batteries. there is.
- the abnormal battery detection apparatus 200 may determine a battery having a correlation coefficient less than or equal to the threshold value (r_th) as an abnormal battery (S440). For example, when the threshold (r_th) is defined as 0.5, the abnormal battery detection device 200 may determine a battery with a correlation coefficient of 0.5 or less among a plurality of batteries as an abnormal battery. Meanwhile, the threshold value (r_th) may be determined as an appropriate value as needed and may be defined as a specific value between 0.4 and 0.8.
- Figure 5 is an operation flowchart of a method for deriving a correlation coefficient according to an embodiment of the present invention.
- the abnormal battery detection device 200 can check the operation mode of the batteries (S510).
- the operation mode may include charge/discharge mode and rest mode.
- the abnormal battery detection device 200 may determine an operation mode based on output current values or input current values for the batteries. For example, if the output or input current value of the batteries is 0, the idle mode may be determined, and if it is not 0, the charge/discharge mode may be determined.
- the abnormal battery detection device 200 may determine the operation mode based on a battery operating state signal received from an external device. For example, a battery operation state signal may be received from a battery charge/discharge control device to determine whether the battery is in a charge/discharge state or an idle state.
- the abnormal battery detection device 200 may determine a first correlation analysis model defined based on Equation 1 as a model for calculating the correlation coefficient. There is (S530).
- the abnormal battery detection device 200 may determine a second correlation analysis model defined based on Equation 3 as a model for calculating the correlation coefficient. (S540).
- the abnormal battery detection apparatus 200 may derive a correlation coefficient (r) for each of the batteries using a correlation analysis model determined according to the operation mode of the battery (S550).
- Figure 6 is an operation flowchart of a method for deriving a correlation coefficient according to another embodiment of the present invention.
- the abnormal battery detection device 200 may calculate COV X,Y and COV N,M based on the state data of the batteries (S610).
- COV X,Y and COV N,M can be calculated based on the equation below.
- the abnormal battery detection device 200 may compare COV X,Y and COV N,M (S620).
- the abnormal battery detection apparatus 200 may derive a correlation coefficient (r) for each of the batteries using a correlation analysis model determined according to the operation mode of the battery (S650).
- Figure 7 shows voltage measurement values for each of eight batteries (Cells 1 to 8) connected in parallel. Referring to FIG. 7, it can be seen that an abnormal voltage phenomenon occurs in Cell 1 and Cell 2 at approximately 1375 sec.
- FIG. 8 to 10 show correlation coefficients for each battery cell calculated by applying a correlation analysis model according to an embodiment of the present invention.
- FIG. 8 is a graph showing the results of applying the first correlation analysis model
- FIG. 9 is a graph showing the results of applying the second correlation analysis model where the weighting coefficient a is defined as 0.1 and the RMS (Noise) is defined as an RMS value of 0.5 mV
- FIG. 10 is a graph showing the results of applying the first correlation analysis model.
- This is a graph of the results of applying the second correlation analysis model, where the weighting coefficient a is 1.0 and the RMS (Noise) is defined as an RMS value of 0.5 mV.
- the threshold (r_th) for detecting an abnormal battery was set to 0.5.
- Figure 11 is a block diagram of an abnormal battery detection device according to an embodiment of the present invention.
- the abnormal battery detection device 200 includes at least one processor 210, a memory 220 that stores at least one command executed through the processor, and is connected to a network to perform communication. It may include a transmitting and receiving device 230.
- the at least one command may include a command to collect status data for each of a plurality of batteries; A command for performing correlation analysis between battery states based on the collected state data and calculating a correlation coefficient for each of the batteries; and a command for detecting an abnormal battery among a plurality of batteries based on the calculated correlation coefficient.
- the command for calculating the correlation coefficient for each of the batteries includes a command for calculating the correlation coefficient for each of the batteries using a correlation analysis model defined based on the standard deviation and covariance of the battery state value. It can be included.
- the command for calculating the correlation coefficient for each of the batteries is a command for calculating the correlation coefficient in which the influence of the sensing noise of the condition measurement sensor is removed using a correlation analysis model reflecting a predefined noise constant. It can be included.
- the noise constant may be defined based on the measurement error value of the state measurement sensor.
- the command for calculating the correlation coefficient for each of the batteries includes a first correlation analysis model defined based on the standard deviation and covariance of the battery state value, and the first correlation analysis model, and sensing of the state measurement sensor. It may include a command for calculating a correlation coefficient for each of the batteries using one of the second correlation analysis models reflecting a noise constant to remove the influence of noise.
- the command for calculating the correlation coefficient for each of the batteries includes a command for checking the operation mode of the batteries; And when in charge/discharge mode, the correlation coefficient may be calculated using the first correlation analysis model, and when in rest mode, the correlation coefficient may be calculated using the second correlation analysis model.
- the command for calculating the correlation coefficient for each of the batteries includes: a command for calculating the covariance of the battery state value and the covariance of the noise component value; and if the covariance of the battery state value exceeds the covariance of the noise component value, a correlation coefficient is calculated using the first correlation analysis model, and if the covariance of the battery state value is less than or equal to the covariance of the noise component value, A command for calculating a correlation coefficient using a second correlation analysis model may be included.
- the command for detecting an abnormal battery among the plurality of batteries may include a command for determining a battery with a correlation coefficient less than or equal to a predefined threshold as an abnormal battery.
- the command for collecting the status data may include a command for collecting one or more of a voltage value and a current value for each of the batteries per unit time.
- the abnormal battery detection device 200 may further include an input interface device 240, an output interface device 250, a storage device 260, etc. Each component included in the abnormal battery detection device 200 is connected by a bus 270 and can communicate with each other.
- the processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed.
- Memory or storage device may be comprised of at least one of a volatile storage medium and a non-volatile storage medium.
- the memory may consist of at least one of read only memory (ROM) and random access memory (RAM).
- Computer-readable recording media include all types of recording devices that store data that can be read by a computer system. Additionally, computer-readable recording media can be distributed across networked computer systems so that computer-readable programs or codes can be stored and executed in a distributed manner.
- a block or device corresponds to a method step or feature of a method step.
- aspects described in the context of a method may also be represented by corresponding blocks or items or features of a corresponding device.
- Some or all of the method steps may be performed by (or using) a hardware device, such as a microprocessor, programmable computer, or electronic circuit, for example. In some embodiments, one or more of the most important method steps may be performed by such an apparatus.
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Abstract
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Claims (18)
- 복수의 배터리들 중 이상 배터리를 검출하는, 이상 배터리 검출 장치로서,적어도 하나의 프로세서;상기 적어도 하나의 프로세서를 통해 실행되는 적어도 하나의 명령을 저장하는 메모리;를 포함하고,상기 적어도 하나의 명령은,복수의 배터리들 각각에 대한 상태 데이터를 수집하는 명령;상기 수집된 상태 데이터를 기초로, 배터리 상태 간의 상관성 분석(correlation analysis)을 수행하여, 배터리들 각각에 대한 상관 계수(correlation coefficient)를 산출하는 명령; 및상기 산출된 상관 계수를 기초로, 복수의 배터리들 중 이상 배터리를 검출하는 명령;을 포함하는, 이상 배터리 검출 장치.
- 청구항 1에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 명령은,배터리 상태 값의 표준 편차 및 공분산(covariance)에 기초하여 정의되는 상관성 분석 모델을 이용하여, 상기 배터리들 각각에 대한 상관 계수를 산출하는 명령을 포함하는, 이상 배터리 검출 장치.
- 청구항 2에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 명령은,기정의된 노이즈 상수가 반영된 상관성 분석 모델을 이용하여, 상태 측정 센서의 센싱 노이즈에 의한 영향이 제거된 상관 계수를 산출하는 명령을 포함하는, 이상 배터리 검출 장치.
- 청구항 3에 있어서,상기 노이즈 상수는,상기 상태 측정 센서의 계측 오차값을 기초로 정의되는, 이상 배터리 검출 장치.
- 청구항 1에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 명령은,배터리 상태 값의 표준 편차 및 공분산(covariance)에 기초하여 정의되는 제1 상관성 분석 모델, 및 상기 제1 상관성 분석 모델에, 상태 측정 센서의 센싱 노이즈에 의한 영향을 제거하기 위한 노이즈 상수가 반영된 제2 상관성 분석 모델 중 어느 하나를 이용하여, 상기 배터리들 각각에 대한 상관 계수를 산출하는 명령을 포함하는, 이상 배터리 검출 장치.
- 청구항 5에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 명령은,상기 배터리들의 동작 모드를 확인하는 명령; 및충방전 모드인 경우, 상기 제1 상관성 분석 모델을 이용하여 상관 계수를 산출하고, 휴지 모드인 경우, 상기 제2 상관성 분석 모델을 이용하여 상관 계수를 산출하는 명령을 포함하는, 이상 배터리 검출 장치.
- 청구항 5에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 명령은,배터리 상태 값의 공분산 및 노이즈 성분 값의 공분산을 산출하는 명령; 및상기 배터리 상태 값의 공분산이 상기 노이즈 성분 값의 공분산을 초과하면, 상기 제1 상관성 분석 모델을 이용하여 상관 계수를 산출하고, 상기 배터리 상태 값의 공분산이 상기 노이즈 성분 값의 공분산 이하하면, 상기 제2 상관성 분석 모델을 이용하여 상관 계수를 산출하는 명령을 포함하는, 이상 배터리 검출 장치.
- 청구항 1에 있어서,상기 복수의 배터리들 중 이상 배터리를 검출하는 명령은,기정의된 임계 값 이하의 상관 계수를 갖는 배터리를 이상 배터리로 결정하는 명령을 포함하는, 이상 배터리 검출 장치.
- 청구항 1에 있어서,상기 상태 데이터를 수집하는 명령은,상기 배터리들 각각에 대한 전압 값 및 전류 값 중 하나 이상을 단위 시간마다 수집하는 명령을 포함하는, 이상 배터리 검출 장치.
- 복수의 배터리들 중 이상 배터리를 검출하는 이상 배터리 검출 장치에 의한, 이상 배터리 검출 방법으로서,복수의 배터리들 각각에 대한 상태 데이터를 수집하는 단계;상기 수집된 상태 데이터를 기초로, 배터리 상태 간의 상관성 분석(correlation analysis)을 수행하여, 배터리들 각각에 대한 상관 계수(correlation coefficient)를 산출하는 단계; 및상기 산출된 상관 계수를 기초로, 복수의 배터리들 중 이상 배터리를 검출하는 단계;를 포함하는, 이상 배터리 검출 방법.
- 청구항 10에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 단계는,배터리 상태 값의 표준 편차 및 공분산(covariance)에 기초하여 정의되는 상관성 분석 모델을 이용하여, 상기 배터리들 각각에 대한 상관 계수를 산출하는 단계를 포함하는, 이상 배터리 검출 방법.
- 청구항 11에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 단계는,기정의된 노이즈 상수가 반영된 상관성 분석 모델을 이용하여, 상태 측정 센서의 센싱 노이즈에 의한 영향이 제거된 상관 계수를 산출하는 단계를 포함하는, 이상 배터리 검출 방법.
- 청구항 12에 있어서,상기 노이즈 상수는,상기 상태 측정 센서의 계측 오차값을 기초로 정의되는, 이상 배터리 검출 방법.
- 청구항 10에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 단계는,배터리 상태 값의 표준 편차 및 공분산(covariance)에 기초하여 정의되는 제1 상관성 분석 모델, 및 상기 제1 상관성 분석 모델에, 상태 측정 센서의 센싱 노이즈에 의한 영향을 제거하기 위한 노이즈 상수가 반영된 제2 상관성 분석 모델 중 어느 하나를 이용하여, 상기 배터리들 각각에 대한 상관 계수를 산출하는 단계를 포함하는, 이상 배터리 검출 방법.
- 청구항 14에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 단계는,상기 배터리들의 동작 모드를 확인하는 단계; 및충방전 모드인 경우, 상기 제1 상관성 분석 모델을 이용하여 상관 계수를 산출하고, 휴지 모드인 경우, 상기 제2 상관성 분석 모델을 이용하여 상관 계수를 산출하는 단계를 포함하는, 이상 배터리 검출 방법.
- 청구항 14에 있어서,상기 배터리들 각각에 대한 상관 계수를 산출하는 단계는,배터리 상태 값의 공분산 및 노이즈 성분 값의 공분산을 산출하는 단계; 및상기 배터리 상태 값의 공분산이 상기 노이즈 성분 값의 공분산을 초과하면, 상기 제1 상관성 분석 모델을 이용하여 상관 계수를 산출하고, 상기 배터리 상태 값의 공분산이 상기 노이즈 성분 값의 공분산 이하하면, 상기 제2 상관성 분석 모델을 이용하여 상관 계수를 산출하는 단계를 포함하는, 이상 배터리 검출 방법.
- 청구항 10에 있어서,상기 복수의 배터리들 중 이상 배터리를 검출하는 단계는,기정의된 임계 값 이하의 상관 계수를 갖는 배터리를 이상 배터리로 결정하는 단계를 포함하는, 이상 배터리 검출 방법.
- 청구항 10에 있어서,상기 상태 데이터를 수집하는 단계는,상기 배터리들 각각에 대한 전압 값 및 전류 값 중 하나 이상을 단위 시간마다 수집하는 단계를 포함하는, 이상 배터리 검출 방법.
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| US18/836,417 US20250116707A1 (en) | 2022-08-31 | 2023-07-12 | Faulty Battery Detection Apparatus and Method |
| CN202380020966.9A CN118661107A (zh) | 2022-08-31 | 2023-07-12 | 故障电池检测设备和方法 |
| JP2024542963A JP7827252B2 (ja) | 2022-08-31 | 2023-07-12 | 異常電池検出装置及び方法 |
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| KR20220109748A (ko) | 2021-01-29 | 2022-08-05 | (주)케이시크 | 자율주행자동차 좌석장치 최적화 서비스 방법 및 시스템 |
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| CN110712528B (zh) * | 2019-10-25 | 2020-11-06 | 优必爱信息技术(北京)有限公司 | 一种动力电池组实时监控方法及设备 |
| CN112946522A (zh) * | 2021-02-05 | 2021-06-11 | 四川大学 | 低温工况导致电池储能系统内短路故障的在线监测方法 |
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| US20250116707A1 (en) | 2025-04-10 |
| EP4462141A4 (en) | 2025-09-03 |
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| KR20240030553A (ko) | 2024-03-07 |
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