WO2014065614A1 - 배터리 잔존 용량 추정 장치 및 방법 - Google Patents
배터리 잔존 용량 추정 장치 및 방법 Download PDFInfo
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- WO2014065614A1 WO2014065614A1 PCT/KR2013/009534 KR2013009534W WO2014065614A1 WO 2014065614 A1 WO2014065614 A1 WO 2014065614A1 KR 2013009534 W KR2013009534 W KR 2013009534W WO 2014065614 A1 WO2014065614 A1 WO 2014065614A1
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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]
- G01R31/3644—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
- 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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/40—Data acquisition and logging
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Definitions
- the present invention relates to an apparatus and method for estimating battery remaining capacity, wherein an input / output power pattern of a battery is analyzed for a predetermined time to determine a current application state of a battery and a remaining capacity corresponding to a current application state of a battery;
- the SOC estimation error of the battery can be minimized by actively applying the estimation algorithm appropriate to the situation in estimating the SOC of the battery, thereby obtaining a more accurate SOC estimate of the battery.
- the secondary battery having high applicationability and high electrical density, etc. according to the product range is not only portable device but also electric vehicle (EV), hybrid vehicle (HV, hybrid vehicle) or household or BACKGROUND ART It is commonly applied to energy storage systems (ESSs) and uninterruptible power supply (UPS) systems using medium and large batteries used for industrial purposes.
- EV electric vehicle
- HV hybrid vehicle
- UPS uninterruptible power supply
- the secondary battery is attracting attention as a new energy source for improving eco-friendliness and energy efficiency in that not only the primary advantage of significantly reducing the use of fossil fuels is generated, but also no by-products of energy use are generated.
- the secondary battery When the secondary battery is implemented as a battery such as a mobile terminal, this may not necessarily be the case. However, as described above, a battery applied to an electric vehicle or an energy storage source is generally used in the form of a plurality of unit secondary battery cells. This makes it suitable for high capacity environments.
- a battery management system for managing the state and performance of the battery.
- the BMS measures the current, voltage, and temperature of the battery, estimates the battery's state of charging (SOC), and controls the SOC for the best fuel consumption efficiency.
- SOC state of charging
- the battery voltage is measured during charging and discharging of the battery, and the open loop voltage (OCV) of the no-load state is estimated from the measured voltage, and the SOC corresponding to the estimated open voltage is obtained by referring to the SOC table for each open voltage.
- OCV open loop voltage
- the measured voltage is very different from the actual voltage. For example, when the battery is connected to the load and the discharge starts, the voltage of the battery drops sharply, and when the battery starts charging from an external power source, the voltage of the battery rises sharply. Therefore, there is a problem in that the accuracy of the SOC is lowered due to an error between the measured voltage and the actual voltage during charging and discharging of the battery.
- An object of the present invention is to analyze the input and output power pattern of the battery for a predetermined time to determine the current application state of the battery and to calculate the SOC of the battery by using the SOC estimation algorithm corresponding to the current application state of the battery,
- the present invention provides an apparatus and method for estimating remaining battery capacity by actively applying an estimation algorithm appropriate to a situation to minimize SOC estimation error of a battery, thereby obtaining a more accurate SOC estimate of a battery.
- An apparatus for estimating battery remaining capacity may include an input / output power pattern analyzer configured to analyze input / output power of a battery for a preset time to obtain an input / output power pattern of the battery; An application state determination unit which analyzes an input / output power pattern of the battery to determine a current application state of the battery; And an SOC calculator configured to calculate an SOC of the battery using a state of charging (SOC) estimation algorithm corresponding to a current application state of the battery.
- SOC state of charging
- the input / output power pattern may include a short term input / output power pattern and a long term input / output power pattern.
- the input / output power pattern unit may include a short-term input / output power pattern analyzer configured to analyze the input / output power of the battery for a first set time to obtain a short-term input / output power pattern of the battery; And a long term input / output power pattern analyzer configured to analyze the input / output power of the battery during the second set time longer than the first set time to obtain a long term input / output power pattern of the battery.
- the SOC estimation algorithm may include an Extended Kalman Filter (EKF) SOC estimation algorithm or a Smart SOC Moving Estimation (SSME) algorithm.
- EKF Extended Kalman Filter
- SSME Smart SOC Moving Estimation
- the current application state of the battery may include one or more of a constant current (CC) state, a photovoltaic (PV) state, a frequency regulation (FR) state, and a peak shaving (PS) state. It may include.
- CC constant current
- PV photovoltaic
- FR frequency regulation
- PS peak shaving
- the SOC calculator may calculate the SOC of the battery using the EKF SOC estimation algorithm when the current application state of the battery is the CC state or the PV state.
- the SOC calculator may calculate the SOC of the battery using the SSME algorithm when the current application state of the battery is the FR state or the PS state.
- the SOC calculator may calculate the SOC of the battery using the EKF SOC estimation algorithm when a depth of disc (DOD) of the input / output power pattern of the battery is equal to or greater than a predetermined reference value.
- DOD depth of disc
- the SOC calculator may calculate the SOC of the battery using the SSME algorithm when the DOD of the input / output power pattern of the battery is less than a predetermined reference value.
- the battery remaining capacity estimating apparatus may further include a current sensor checking unit for checking whether there is a current sensor or an abnormality of the current sensor for measuring the value of the current input / output to the battery.
- the SOC calculator may calculate the SOC of the battery by using the SSME algorithm when it is determined that there is no current sensor or an abnormality in the current sensor.
- a method of estimating battery remaining capacity including: analyzing an input / output power of a battery for a preset time to obtain an input / output power pattern of the battery; Analyzing an input / output power pattern of the battery to determine a current application state of the battery; And calculating an SOC of the battery by using an SOC estimation algorithm corresponding to a current application state of the battery.
- the input / output power pattern may include a short term input / output power pattern and a long term input / output power pattern.
- the acquiring the input / output power pattern of the battery may include obtaining the short-term input / output power pattern of the battery by analyzing the input / output power of the battery for a first set time; And analyzing the input / output power of the battery during the second setting time longer than the first setting time to obtain a long-term input / output power pattern of the battery.
- the SOC estimation algorithm may include an EKF SOC estimation algorithm or an SSME algorithm.
- the current application state of the battery may include one or more of a constant current (CC) state, a photovoltaic (PV) state, a frequency regulation (FR) state, and a peak shaving (PS) state. It may include.
- CC constant current
- PV photovoltaic
- FR frequency regulation
- PS peak shaving
- the calculating of the SOC of the battery may include calculating the SOC of the battery using the EKF SOC estimation algorithm when the current application state of the battery is the CC state or the PV state.
- the calculating of the SOC of the battery may include calculating the SOC of the battery using the SSME algorithm when the current application state of the battery is the FR state or the PS state.
- the calculating of the SOC of the battery may include calculating the SOC of the battery using the EKF SOC estimation algorithm when the depth of disc (DOD) of the battery input / output power pattern is greater than or equal to a predetermined reference value. It may include.
- the calculating of the SOC of the battery may include calculating the SOC of the battery using the SSME algorithm when the DOD of the input / output power pattern of the battery is less than a predetermined reference value.
- the method for estimating the remaining battery capacity may further include determining whether there is a current sensor or an abnormality of the current sensor for measuring a value of the current inputted and outputted to the battery.
- the calculating of the SOC of the battery may include calculating the SOC of the battery using the SSME algorithm when it is determined that there is no current sensor or an abnormality in the current sensor in the step of confirming the presence or absence of the current sensor. .
- an apparatus and method for estimating remaining battery capacity of the battery can be provided by minimizing an SOC estimation error of a battery by actively applying an estimation algorithm suitable for a situation.
- FIG. 1 is a diagram schematically illustrating an electric vehicle to which an apparatus for estimating battery remaining capacity according to an embodiment of the present invention may be applied.
- FIG. 2 is a diagram schematically illustrating an apparatus for estimating battery remaining capacity according to an embodiment of the present invention.
- 3 to 5 are diagrams for explaining the SSME algorithm used in the battery remaining capacity estimation apparatus according to an embodiment of the present invention.
- FIG. 6 is a flowchart illustrating a method of estimating battery remaining capacity according to an embodiment of the present invention.
- ... unit described in the specification means a unit for processing one or more functions or operations, which may be implemented in hardware or software or a combination of hardware and software.
- the electric vehicle described below refers to a vehicle including one or more electric motors as propulsion force.
- the energy used to propel electric vehicles includes electrical sources such as rechargeable batteries and / or fuel cells.
- the electric vehicle may be a hybrid electric vehicle that uses a combustion engine as another power source.
- FIG. 1 is a diagram schematically illustrating an electric vehicle to which an apparatus for estimating battery remaining capacity according to an embodiment of the present invention may be applied.
- the battery remaining capacity estimating apparatus is a household or industrial energy storage system in addition to an electric vehicle. Any technical field may be applied as long as the secondary battery may be applied, such as an Energy Storage System (ESS) or an Uninterruptible Power Supply (UPS) system.
- ESS Energy Storage System
- UPS Uninterruptible Power Supply
- the electric vehicle 1 may include a battery 10, a battery management system (BMS) 20, an electronic control unit (ECU) 30, an inverter 40, and a motor 50.
- BMS battery management system
- ECU electronice control unit
- inverter 40 inverter 40
- motor 50 a motor 50.
- the battery 10 is an electric energy source for driving the electric vehicle 1 by providing a driving force to the motor 50.
- the battery 10 may be charged or discharged by the inverter 40 according to the driving of the motor 50 and / or the internal combustion engine (not shown).
- the type of the battery 10 is not particularly limited, and the battery 10 may be, for example, a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, or the like.
- the battery 10 is formed of a battery pack in which a plurality of battery cells are connected in series and / or in parallel.
- one or more such battery packs may be provided to form the battery 10.
- the BMS 20 estimates the state of the battery 10 and manages the battery 10 using the estimated state information.
- the battery 10 state information such as state of charging (SOC), state of health (SOH), maximum input / output power allowance, and output voltage of the battery 10 is estimated and managed.
- the charging or discharging of the battery 10 is controlled using the state information, and the replacement time of the battery 10 may be estimated.
- the BMS 20 may include a battery remaining capacity estimating apparatus (100 of FIG. 2) described later.
- the battery remaining capacity estimating apparatus can further improve the accuracy and reliability of SOC estimation of the battery 10.
- the ECU 30 is an electronic control device for controlling the state of the electric vehicle 1.
- the torque degree is determined based on information such as an accelerator, a break, a speed, and the like, and the output of the motor 50 is controlled to match the torque information.
- the ECU 30 transmits a control signal to the inverter 40 so that the battery 10 can be charged or discharged based on state information such as SOC and SOH of the battery 10 received by the BMS 20. .
- the inverter 40 causes the battery 10 to be charged or discharged based on the control signal of the ECU 30.
- the motor 50 drives the electric vehicle 1 based on the control information (for example, torque information) transmitted from the ECU 30 using the electric energy of the battery 10.
- control information for example, torque information
- FIG. 2 is a diagram schematically illustrating an apparatus for estimating battery remaining capacity according to an embodiment of the present invention.
- the battery remaining capacity estimation apparatus 100 is connected to the battery 10 to estimate the SOC of the battery 10.
- the apparatus 100 for estimating battery remaining capacity may include a battery management system (BMS) connected to the battery 10, a power monitoring system (eg, a supervisory control and data collection system). Data Acquisition (SCADA)], a user using the terminal and the charger or battery, or may be implemented in the form of a BMS, power monitoring system, a user using the terminal and the charger.
- BMS battery management system
- SCADA Data Acquisition
- the apparatus 100 for estimating battery remaining capacity includes an input / output power pattern analyzer 110, an application state determiner 120, an SOC calculator 130, and a current sensor checker 140. Can be configured.
- the battery remaining capacity estimating apparatus 100 shown in FIG. 2 is according to an embodiment, and its components are not limited to the embodiment shown in FIG. 2, and some components may be added, changed, or deleted as necessary. Can be.
- the input / output power pattern analyzer 110 analyzes the input / output power of the battery 10 for a preset time to obtain the input / output power pattern of the battery 10. For example, the input / output power pattern is charged above a certain level, discharged below a certain level continuously, and thus a pattern having a high depth of discharge (DOD), which crosses up and down in a specific SOC. The process may occur and there may be a pattern having a low discharge depth.
- DOD depth of discharge
- the input / output power pattern may include a short term input / output power pattern and a long term input / output power pattern.
- the input / output power pattern analyzer 110 may include a short term input / output power pattern analyzer 111 and a long term input / output power pattern analyzer 112.
- the short term input / output power pattern analyzer 111 analyzes the input / output power of the battery 10 during the first set time to obtain a short term input / output power pattern of the battery 10, and the long term input / output power pattern analyzer 112 determines the The input / output power of the battery 10 during the second setting time longer than the first setting time is analyzed to obtain a long-term input / output power pattern of the battery 10.
- the first set time and the second set time may be preset to a fixed value in the battery remaining capacity estimating apparatus 100 according to an embodiment of the present invention, or may be set in response to a user input.
- the first setting time may be 1 minute
- the second setting time may be 60 minutes.
- the application state determination unit 120 analyzes an input / output power pattern of the battery 10 to determine a current application state of the battery 10.
- the current application state of the battery 10 indicates how the battery 10 is currently applied, and includes a constant current (CC) state, a photovoltaic (PV) state, and a frequency regulation (FR) state. And a peak shaving (PS) state.
- the CC state is a state in which a constant current flows in the battery 10, and the battery 10 is charged or discharged with a constant current.
- the PV state is a state in which power is generated in the battery 10 due to photovoltaic power generation.
- the FR state is a state in which the battery 10 is used to adjust the frequency in order to maintain the frequency when the load changes.
- the PS state is a state in which the battery 10 is used to supply emergency power to reduce the peak load during the system peak load period.
- the application state determination unit 120 may determine the current application state of the battery 10 as a CC state or a PV state.
- a process in which the input / output power pattern of the battery 10 crosses up or down in a specific SOC is repeated to show a low pattern of discharge depth.
- 120 may determine a current application state of the battery 10 as a FR state or a PS state.
- the SOC calculator 130 calculates an SOC of the battery 10 by using an SOC estimation algorithm corresponding to a current application state of the battery 10.
- the SOC estimation algorithm may include an Extended Kalman Filter (EKF) SOC estimation algorithm or a Smart SOC Moving Estimation (SSME) algorithm.
- EKF Extended Kalman Filter
- SSME Smart SOC Moving Estimation
- the EKF SOC estimation algorithm is an electrical model of the battery and compares the theoretical and actual outputs of the battery model to estimate the SOC through active calibration.
- the inputs of the EKF SOC estimation algorithm are voltage, current and temperature, and the output is SOC. Since the EKF SOC estimation algorithm is well known through a large number of known data, a detailed description of how the SOC estimation is performed in the EKF SOC estimation algorithm will be omitted.
- the EKF SOC estimation algorithm has the advantage of low SOC maximum error of 3% at room temperature and stable SOC estimation regardless of the power pattern. However, it is sensitive to the parameters of the battery model and requires a current sensor. In addition, there is a disadvantage in that the battery is sensitive to changes in the state of health (SOH) of the battery.
- SOH state of health
- the SSME algorithm is a method of estimating the change of the open circuit voltage (OCV) based on the change of the previous value and the current value of the termination measurement voltage without using the current value and estimating the SOC based on the estimated OCV.
- the inputs of the EKF SOC estimation algorithm are voltage and temperature, and the outputs are SOC.
- the SSME algorithm will be described with reference to FIGS. 3 to 5.
- 3 to 5 are diagrams for explaining the SSME algorithm used in the battery remaining capacity estimation apparatus according to an embodiment of the present invention.
- 3 and 4 are diagrams for describing a method of estimating OCV change according to two voltage patterns.
- the curve of the measured voltage value 201 shows hunting as time passes. At this time, since the actual OCV is likely to be a converging voltage value, the SSME algorithm quickly approaches the estimated OCV value 202 to the measured voltage value 201.
- the curve of the measured voltage value 301 diverges as the slope increases with time. In this case, since there is a high probability that the voltage bounces due to the transient large current, it is possible to follow the estimated OCV value 302 as slowly as possible.
- FIG. 5 is a diagram for describing a solution of an SSME algorithm for a problem that may occur in the case of OCV estimation based on two voltage patterns described with reference to FIGS. 3 and 4.
- the SSME algorithm uses a correction factor according to the moving average. That is, when the moving average value and the estimated OCV value are increased by a predetermined level or more, a curve 403 is generated by using the correction factor so that the estimated OCV value follows the measured voltage value 401 regardless of the voltage pattern.
- SSME algorithm has the advantage that the current sensor is unnecessary, there is no accumulation of error, but the accuracy is poor in the linear power pattern, the maximum error of the SOC at room temperature is about 5% compared to the EKF SOC estimation algorithm is somewhat larger.
- the SOC estimation algorithm described above has certain advantages and disadvantages, and it is difficult to conclude that something is definitely good.
- SOC accuracy may vary according to the input / output power pattern of the battery 10.
- the SOC calculator 130 may increase the accuracy of the SOC by calculating the SOC of the battery 10 by using an appropriate SOC estimation algorithm corresponding to the current application state of the battery 10.
- the SOC calculator 130 may calculate the SOC of the battery 10 by using the EKF SOC estimation algorithm. If the current application state of the battery 10 is a CC state or a PV state, since a constant current flows in the battery 10, the linear power pattern will be represented. Therefore, a more accurate SOC may be calculated by using the EKF SOC estimation algorithm rather than the SSME algorithm. could be. Since the application state of the battery 10 shows most linear power patterns except for the FR state or the PS state, the EKF SOC estimation algorithm can be applied in the current application state of most batteries 10.
- the SOC calculator 130 may calculate the SOC of the battery 10 by using the SSME algorithm. If the current application state of the battery 10 is a FR state or a PS state, since the current in the battery 10 is repeated by crossing the up and down, it will represent a non-linear power pattern, so using the SSME algorithm rather than the EKF SOC estimation algorithm It will be possible to calculate more accurate SOC.
- the SOC calculator 130 uses the EKF SOC estimation algorithm to determine whether the battery 10 SOC can be calculated.
- the high DOD of the battery 10 indicates that the battery is charged above a certain level and discharged below a certain level continuously, thus indicating a linear power pattern. Therefore, the EKF SOC estimation algorithm can be used to calculate more accurate SOC than the SSME algorithm.
- the preset reference value may be preset to a value fixed to the SOC calculator 130 or may be set in response to a user input.
- the SOC calculator 130 may calculate the SOC of the battery 10 using the SSME algorithm when the DOD of the input / output power pattern of the battery 10 is less than a preset reference value.
- the low DOD of the battery 10 will indicate a non-linear power pattern because the power pattern repeats up and down in a particular SOC. Therefore, using the SSME algorithm rather than the EKF SOC estimation algorithm will be able to calculate a more accurate SOC.
- the current sensor checking unit 104 checks the presence or absence of the current sensor 11 or the abnormality of the current sensor 11 that measures the value of the current inputted to the battery 10.
- the SOC calculating unit 103 immediately uses the SSME algorithm to determine the battery 10. Calculate the SOC. This is because the SSME algorithm does not require a current value, so that the current sensor 11 may be omitted.
- FIG. 6 is a flowchart illustrating a method of estimating battery remaining capacity according to an embodiment of the present invention.
- a method for estimating battery remaining capacity when a method for estimating battery remaining capacity according to an embodiment of the present invention is started, first, a presence of a current sensor (S10) and an abnormality of a current sensor (S20) are checked. If it is determined that there is no current sensor or there is an error in the current sensor, the SOC is calculated immediately using the SSME algorithm S80 (S90).
- an input / output power pattern of the battery is obtained by analyzing the input / output power of the battery for a predetermined time.
- the input / output power pattern includes a short term input / output power pattern and a long term input / output power pattern.
- the obtaining of the input / output power pattern of the battery may be performed by analyzing the input / output power of the battery during a first setting time to obtain a short-term input / output power pattern of the battery (S30), and for a second setting time longer than the first setting time. Analyzing the input / output power of the battery may be performed to obtain a long-term input and output power pattern of the battery (S40).
- the SOC of the battery is calculated using an SOC estimation algorithm corresponding to the current application state of the battery (S60, S70, S80, and S90).
- the SOC of the battery is calculated using the EKF SOC estimation algorithm (S70) (S90), the current application state of the battery When S60 is in the FR state or the PS state, the SOC of the battery is calculated using the SSME algorithm S80 (S90).
Abstract
Description
Claims (20)
- 기설정된 시간 동안의 배터리의 입출력 전력을 분석하여 상기 배터리의 입출력 전력 패턴을 획득하는 입출력 전력 패턴 분석부;상기 배터리의 입출력 전력 패턴을 분석하여 상기 배터리의 현재 적용 상태를 판단하는 적용 상태 판단부; 및상기 배터리의 현재 적용 상태에 대응하는 잔존 용량(State Of Charging; SOC) 추정 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 SOC 산출부를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 1에 있어서,상기 입출력 전력 패턴은,단기 입출력 전력 패턴 및 장기 입출력 전력 패턴을 포함하고,상기 입출력 전력 패턴부는,제1 설정 시간 동안의 배터리의 입출력 전력을 분석하여 상기 배터리의 단기 입출력 전력 패턴을 획득하는 단기 입출력 전력 패턴 분석부; 및상기 제1 설정 시간보다 긴 제2 설정 시간 동안의 상기 배터리의 입출력 전력을 분석하여 상기 배터리의 장기 입출력 전력 패턴을 획득하는 장기 입출력 전력 패턴 분석부를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 1에 있어서,상기 SOC 추정 알고리즘은,EKF(Extended Kalman Filter) SOC 추정 알고리즘 또는 SSME(Smart SOC Moving Estimation) 알고리즘을 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 3에 있어서,상기 배터리의 현재 적용 상태는,정전류(Constant Current; CC) 상태, 광발전(PhotoVoltaic; PV) 상태, 주파수 조정(Frequency Regulation; FR) 상태 및 첨두부하 삭감(Peak Shaving; PS) 상태 중 하나 이상을 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 4에 있어서,상기 SOC 산출부는,상기 배터리의 현재 적용 상태가 CC 상태 또는 PV 상태인 경우, 상기 EKF SOC 추정 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 4에 있어서,상기 SOC 산출부는,상기 배터리의 현재 적용 상태가 FR 상태 또는 PS 상태인 경우, 상기 SSME 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 3에 있어서,상기 SOC 산출부는,상기 배터리의 입출력 전력 패턴의 방전심도(Depth Of Dischrge; DOD)가 기설정된 기준값 이상인 경우, 상기 EKF SOC 추정 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 3에 있어서,상기 SOC 산출부는,상기 배터리의 입출력 전력 패턴의 DOD가 기설정된 기준값 미만인 경우, 상기 SSME 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 3에 있어서,상기 배터리에 입출력되는 전류의 값을 측정하는 전류 센서의 유무 또는 전류 센서의 이상 유무를 확인하는 전류 센서 확인부를 더 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 청구항 9에 있어서,상기 SOC 산출부는,상기 전류 센서 확인부에서 전류 센서가 없거나 전류 센서에 이상이 있는 것으로 판단되는 경우, 상기 SSME 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 것을 특징으로 하는 배터리 잔존 용량 추정 장치.
- 기설정된 시간 동안의 배터리의 입출력 전력을 분석하여 상기 배터리의 입출력 전력 패턴을 획득하는 단계;상기 배터리의 입출력 전력 패턴을 분석하여 상기 배터리의 현재 적용 상태를 판단하는 단계; 및상기 배터리의 현재 적용 상태에 대응하는 잔존 용량(State Of Charging; SOC) 추정 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 11에 있어서,상기 입출력 전력 패턴은,단기 입출력 전력 패턴 및 장기 입출력 전력 패턴을 포함하고,상기 배터리의 입출력 전력 패턴을 획득하는 단계는,제1 설정 시간 동안의 배터리의 입출력 전력을 분석하여 상기 배터리의 단기 입출력 전력 패턴을 획득하는 단계; 및상기 제1 설정 시간보다 긴 제2 설정 시간 동안의 상기 배터리의 입출력 전력을 분석하여 상기 배터리의 장기 입출력 전력 패턴을 획득하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 11에 있어서,상기 SOC 추정 알고리즘은,EKF(Extended Kalman Filter) SOC 추정 알고리즘 또는 SSME(Smart SOC Moving Estimation) 알고리즘을 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 13에 있어서,상기 배터리의 현재 적용 상태는,정전류(Constant Current; CC) 상태, 광발전(PhotoVoltaic; PV) 상태, 주파수 조정(Frequency Regulation; FR) 상태 및 첨두부하 삭감(Peak Shaving; PS) 상태 중 하나 이상을 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 14에 있어서,상기 배터리의 SOC를 산출하는 단계는,상기 배터리의 현재 적용 상태가 CC 상태 또는 PV 상태인 경우, 상기 EKF SOC 추정 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 14에 있어서,상기 배터리의 SOC를 산출하는 단계는,상기 배터리의 현재 적용 상태가 FR 상태 또는 PS 상태인 경우, 상기 SSME 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 13에 있어서,상기 배터리의 SOC를 산출하는 단계는,상기 배터리의 입출력 전력 패턴의 방전심도(Depth Of Dischrge; DOD)가 기설정된 기준값 이상인 경우, 상기 EKF SOC 추정 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 13에 있어서,상기 배터리의 SOC를 산출하는 단계는,상기 배터리의 입출력 전력 패턴의 DOD가 기설정된 기준값 미만인 경우, 상기 SSME 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 13에 있어서,상기 배터리에 입출력되는 전류의 값을 측정하는 전류 센서의 유무 또는 전류 센서의 이상 유무를 확인하는 단계를 더 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
- 청구항 19에 있어서,상기 배터리의 SOC를 산출하는 단계는,상기 전류 센서의 유무를 확인하는 단계에서 전류 센서가 없거나 전류 센서에 이상이 있는 것으로 판단되는 경우, 상기 SSME 알고리즘을 이용하여 상기 배터리의 SOC를 산출하는 단계를 포함하는 것을 특징으로 하는 배터리 잔존 용량 추정 방법.
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KR20120079808A (ko) * | 2011-01-05 | 2012-07-13 | 주식회사 엘지화학 | 배터리 가용시간 추정 장치 및 방법 |
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EP2921870B1 (en) | 2019-12-04 |
EP2921870A4 (en) | 2016-04-06 |
JP2015505955A (ja) | 2015-02-26 |
KR20140053590A (ko) | 2014-05-08 |
US9310441B2 (en) | 2016-04-12 |
KR101547005B1 (ko) | 2015-08-24 |
CN104011554B (zh) | 2016-06-22 |
US20150046107A1 (en) | 2015-02-12 |
CN104011554A (zh) | 2014-08-27 |
JP5916024B2 (ja) | 2016-05-11 |
TWI510799B (zh) | 2015-12-01 |
EP2921870A1 (en) | 2015-09-23 |
TW201439567A (zh) | 2014-10-16 |
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