WO2014103705A1 - 蓄電デバイスの寿命予測装置及び蓄電デバイスの寿命予測方法 - Google Patents
蓄電デバイスの寿命予測装置及び蓄電デバイスの寿命予測方法 Download PDFInfo
- Publication number
- WO2014103705A1 WO2014103705A1 PCT/JP2013/083107 JP2013083107W WO2014103705A1 WO 2014103705 A1 WO2014103705 A1 WO 2014103705A1 JP 2013083107 W JP2013083107 W JP 2013083107W WO 2014103705 A1 WO2014103705 A1 WO 2014103705A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- storage device
- life prediction
- unit
- life
- lifetime
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- 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
-
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a device for predicting the life of a power storage device capable of predicting the life of a power storage device with higher accuracy under an arbitrary operation condition, in consideration of the type and operation conditions of the power storage device that affects the life of the power storage device.
- the present invention relates to a method for predicting the lifetime of an electricity storage device.
- the types of power storage devices such as nickel metal hydride batteries, lithium ion batteries, and electric double layer capacitors are diversifying.
- the application fields of power storage devices such as home appliances, backup power supplies, EVs (Electronic Vehicles), HEVs (Hybrids Electric Vehicles), and smart grids are also expanding. Applications are expanding.
- the lifetime of the electricity storage device is greatly affected by the material, structure, etc. of the electricity storage device (hereinafter referred to as the type of electricity storage device), temperature, end-of-charge / end-of-discharge voltage, etc. (hereinafter referred to as the operating conditions of the electricity storage device). Affected. Therefore, it is important to predict the life of the electricity storage device in consideration of the type of the electricity storage device and the operating conditions.
- the life of a power storage device is predicted by discharging the power storage device periodically during use, and comparing and diagnosing the pulsation amplitude value of the output current and the voltage between the terminals with the basic data at the time of shipment.
- a method for example, refer patent document 1.
- the life of the electricity storage device is predicted by creating an approximate expression of the internal resistance of the electricity storage device and the elapsed years.
- the internal resistance of the electricity storage device is greatly influenced by the type of the electricity storage device and the operating conditions.
- the present invention has been made in order to solve the above-described problems, and in consideration of the type and operating conditions of the power storage device that affects the life of the power storage device, the life of the power storage device can be reduced under any operating condition. It is an object of the present invention to obtain an electricity storage device life prediction apparatus and an electricity storage device life prediction method capable of predicting with higher accuracy.
- An apparatus for predicting the life of an electricity storage device is collected by an actual operation control unit that controls operation of the electricity storage device, an actual operation data collection unit that collects measurement data of the electricity storage device in operation, and an actual operation data collection unit
- An electrical storage device lifetime prediction apparatus comprising a degradation state determination unit that determines a degradation state of an electrical storage device based on the measured data and a lifetime prediction unit that predicts the lifetime of the electrical storage device, wherein the lifetime prediction unit
- a life prediction operation control unit that individually controls the power storage device for a plurality of different operating conditions based on a plurality of operating conditions that are set in advance with respect to a plurality of factors that affect the evaluation characteristics used for the device life calculation.
- the method for predicting the life of an electricity storage device is a method for predicting the life of an electricity storage device used in the device for predicting the life of an electricity storage device according to the present invention.
- An operation control step for individually controlling the power storage device for a plurality of different operation conditions based on operation conditions set in advance with respect to a plurality of affecting factors, and an operation control by the operation control step using a plurality of different operation conditions
- To collect measurement data for each of a plurality of operating conditions calculate evaluation characteristics based on the collected measurement data, and sequentially accumulate in the storage unit as time-varying data, and a data collection step
- Each time-varying data related to evaluation characteristics stored in the storage Based on the regression formula created in the regression formula creation step and the regression formula created in the regression formula creation step that creates a regression formula that shows the relationship between the evaluation characteristics and the running time for each of multiple operating conditions by curve fitting with a function
- a life prediction step for calculating a predicted value of evaluation characteristics when operating conditions arbitrarily set as a plurality of factors
- a life prediction formula that can predict evaluation characteristics used for life calculation of an electricity storage device under an arbitrary operation condition by statistical processing based on actually measured data under a plurality of operation conditions set in advance according to the type of electricity storage device.
- the life prediction of the electricity storage device that can predict the life of the electricity storage device with higher accuracy under any operating condition, taking into account the type and operation conditions of the electricity storage device that affects the life of the electricity storage device. It is possible to obtain a life prediction method for an apparatus and a power storage device.
- Embodiment 1 of this invention It is a block diagram of the lifetime prediction apparatus of the electrical storage device in Embodiment 1 of this invention. It is a block diagram of the lifetime prediction part in the lifetime prediction apparatus of the electrical storage device in Embodiment 2 of this invention. It is an illustration figure of the candidate of the evaluation characteristic and factor in Embodiment 2 of this invention. It is an illustration figure of the evaluation characteristic, factor, and level in Embodiment 2 of this invention. It is a 2-level L12 orthogonal array table used in the orthogonal array experiment. It is an orthogonal arrangement
- FIG. It is an example which showed the specific set value regarding six factors as arbitrary driving conditions concerning Embodiment 2 of the present invention. It is a figure which shows the error of the estimated value of the capacity
- FIG. FIG. 1 is a configuration diagram of a storage device lifetime prediction apparatus according to Embodiment 1 of the present invention.
- the life prediction device for an electricity storage device shown in FIG. 1 includes an actual operation data collection unit 1, a deterioration state determination unit 2, a life prediction unit 3, an actual operation control unit 4, and a display unit 5.
- FIG. 1 is a life prediction target in the present invention.
- a cylindrical lithium ion battery is assumed as the power storage device, but the power storage device in the present invention is not limited to the cylindrical lithium ion battery.
- a storage battery such as a lead storage battery, a nickel cadmium battery, a nickel hydrogen battery, a sodium sulfur battery, or a redox flow battery, or a storage device such as an electric double layer capacitor can be used as the storage device.
- a primary battery may be sufficient.
- it may be composed of a plurality of primary batteries / secondary batteries connected in series / parallel.
- the actual operation data collection unit 1 corresponds to a CMU (Cell Monitoring Unit) or a BMU (Battery Management Unit). That is, the actual operation data collection unit 1 measures data such as the temperature, current, and voltage of the power storage device that is under operation control under a certain operation condition at predetermined time intervals, and determines the deterioration state determination unit 2 and the life prediction unit 3. Output to.
- CMU Cell Monitoring Unit
- BMU Battery Management Unit
- Degradation state determination unit 2 is the measurement data such as temperature, current and voltage of the storage device (hereinafter simply referred to as “measurement data based on operation conditions”) input from actual operation data collection unit 1 under certain operation conditions. Based on this, the deterioration state of the electricity storage device is determined. For example, the internal resistance of the electricity storage device is calculated from the current and voltage, and the deterioration state of the electricity storage device is determined from the internal resistance ratio, which is a ratio to the initial internal resistance value, and the actual operating conditions. Alternatively, the deterioration state of the power storage device is determined by calculating the discharge capacity by integrating the current and obtaining a capacity ratio that is a ratio to the initial discharge capacity.
- the life prediction unit 3 always accumulates measurement data based on the operation conditions output by the actual operation data collection unit 1, and predicts the life of the electricity storage device based on the measurement data based on the accumulated operation conditions. In addition, by collecting and accumulating measurement data based on operating conditions in advance, it is possible to predict the lifetime of the electricity storage device under any operating condition. A method for collecting measurement data based on the operating conditions in advance will be described in detail in the second embodiment.
- the actual operation control unit 4 feeds back and inputs the calculation results of the deterioration state determination unit 2 and the life prediction unit 3, and predicts within a range that matches the use condition of the power storage device according to the deterioration state of the power storage device. By optimizing operating conditions such as current and voltage so that the lifetime value is maximized, operation control is performed so that the power storage device has a longer lifetime.
- the actual operation control unit 4 is a controller having a function of controlling the operation of the power storage device, and is an xEMS ((HEMS (Home)) that is an energy management system (energy management system) such as electric power or gas utilizing IT (Information Technology). Energy Management System), BEMS (Building Energy Management System), FEMS (Fucture Energy Management System), and PCU (PowerUrS) for electric vehicles and hybrid electric vehicles. (Programmable ogic controller) is an entire or part of the function.
- the actual operation control unit 4 controls the actual operation of the power storage device using the operation conditions suitable for the actual operation, and uses the storage device usage conditions based on the measurement data collected during the actual operation and the life prediction formula.
- the operating conditions are updated by obtaining the values of the plurality of factors that maximize the predicted life value within the range of the above.
- the actual operation control unit 4 can realize a longer life of the electricity storage device by performing actual operation control of the electricity storage device based on the updated operation condition.
- the display unit 5 displays the deterioration state and life prediction value of the power storage device output from the deterioration state determination unit 2 and the life prediction unit 3.
- the display unit 5 also has a function of displaying the operation conditions and SOC of the power storage device in real time.
- the lifetime prediction device for an electricity storage device is configured as shown in FIG. 1 to predict the lifetime of the electricity storage device based on the measurement data based on the accumulated operating conditions.
- the life prediction apparatus includes, for example, a grid-linked power storage system such as a wind / solar power generation system, a home power storage system used in smart houses, a backup power supply, an electric vehicle, a hybrid electric vehicle, a train It can be applied to vehicles such as buses, and industrial machines / construction machines such as harbor cranes / forklifts. Moreover, the lifetime prediction apparatus in Embodiment 1 of this invention exhibits the effect more in the system which has connected many electrical storage devices in series and parallel.
- the deterioration state determination unit 2 determines the deterioration state of each unit, and controls input / output to each unit according to the result Therefore, it is possible to equalize the deterioration between the units connected in parallel and suppress the deterioration of the entire system. That is, by suppressing input / output for a unit with a large amount of deterioration and increasing input / output of a unit with a small amount of deterioration, deterioration of a unit with a large amount of deterioration is suppressed, and deterioration of a unit with a small amount of deterioration is suppressed. Since it increases, the degradation of the entire system can be suppressed.
- FIG. 1 The second embodiment of the present invention embodies the life prediction unit 3 in the first embodiment.
- FIG. 2 is a configuration diagram of the lifetime predicting unit 3 in the lifetime predicting device for an electricity storage device according to the second embodiment of the present invention. 2 includes an evaluation characteristic determination unit 31, a factor extraction unit 32, a life prediction operation control unit 33, a data collection unit 34, a data analysis unit 35, and a life prediction formula creation unit 36. Composed.
- FIG. 3 is an exemplary diagram of evaluation characteristics and factor candidates according to the second embodiment of the present invention.
- the evaluation characteristic is an evaluation physical quantity used for calculation of the lifetime of the power storage device to be a lifetime prediction target
- the factor is an operating condition that affects the evaluation characteristic.
- the life prediction of various power storage devices for example, the one shown in FIG. 3 is used as the evaluation characteristics and factors.
- Information on the evaluation characteristics suitable for each type of power storage device subject to life prediction and the main factors affecting the evaluation characteristics are stored in advance in a storage unit (not shown) in the life prediction unit 3. Then, the evaluation characteristic determination unit 31 and the factor extraction unit 32 determine and extract evaluation characteristics and factors suitable for the life prediction based on the information stored in advance, in consideration of the type of power storage device to be a life prediction target. To do.
- FIG. 4 is an illustration of evaluation characteristics, factors, and levels in Embodiment 2 of the present invention.
- FIG. 4 shows, as an example, conditions (levels) for controlling evaluation characteristics, factors, and factors when a cylindrical lithium ion battery is used as an electricity storage device.
- discharge capacity is determined as an evaluation characteristic suitable for the lifetime prediction of the cylindrical lithium ion battery from the evaluation characteristic candidates shown in FIG. Further, from the candidate factors shown in FIG. 3, as factors affecting the “discharge capacity”, “temperature”, “charge current”, “discharge current”, “charge end voltage”, “discharge end voltage”, and “( Six factors of “constant voltage holding time during charging” are extracted. The level is set to 2, and two levels are set for each of the six factors.
- the life prediction operation control unit 33 collects measurement data based on the operation conditions of the power storage device, and selects a plurality of combinations (orthogonal to be described later) by selecting one of the two levels for each of the six factors shown in FIG. Based on the operation conditions at the time of life prediction based on the array experiment).
- FIG. 5 is a two-level L12 orthogonal array table used in the orthogonal array experiment.
- a two-level L12 orthogonal array table is used.
- the orthogonal array table used in the present invention is not limited to a two-level L12 orthogonal array table. The optimum one may be selected in consideration of the balance between the required measurement accuracy and the required number of measurements. For example, L9 or L27 orthogonal array table of three level factors can be used. In the orthogonal array table, factors having different levels may be mixed.
- FIG. 6 is an orthogonal array table according to Embodiment 2 of the present invention. 6 is obtained by applying the evaluation characteristics, factors, and levels shown in FIG. 4 to the two-level L12 orthogonal array table shown in FIG. Specifically, discharge capacity is applied as an evaluation characteristic, and temperature, charge current, discharge current, end-of-charge voltage, end-of-discharge voltage, and constant voltage holding time (when charging) are applied as factors A to F, respectively. Yes.
- the discharge capacity is used as the evaluation characteristic, but the evaluation characteristic used in the present invention is not limited to the capacity ratio of the discharge capacity.
- a physical quantity that changes with time such as an internal resistance or an amount of lithium in the electrode, can be used.
- a plurality of these evaluation characteristics may be selected and used in combination.
- the adopted evaluation characteristic is preferably normalized as a ratio with respect to the initial value, and the threshold value of this ratio is used as the life.
- the factors used in the present invention are not limited to the combinations shown in the orthogonal array table of FIG. Other factors may be used as long as they are the main factors affecting the evaluation characteristics.
- each factor to be stored in the storage unit in the life prediction unit 3 is selected in advance, it is effective to extract a factor by a characteristic factor diagram or why analysis.
- the life prediction operation control unit 33 individually controls the operation environment of the electricity storage device for each of the 12 operating conditions according to the orthogonal array table shown in FIG.
- the data collection unit 34 collects and accumulates measurement data based on the operation conditions, and also accumulates evaluation characteristics calculated from the measurement data.
- the data analysis unit 35 performs measurement data and evaluation based on the accumulated operation conditions. Analyze the characteristics.
- FIG. 7 shows the contribution ratio of each factor measured under the operating conditions of FIG. 6 in Embodiment 2 of the present invention.
- the analysis of variance was performed to calculate the contribution ratio of each factor.
- the factor contribution ratio is a value indicating the relative influence of each factor on the evaluation characteristic, and is a known technique used in Patent Document 3 and the like.
- the error in FIG. 7 includes the effect of the interaction between factors. Since this error is small, it can be seen that the interaction between factors is small in the orthogonal array table shown in FIG. Here, the interaction is an effect in which a change in the level of a factor affects another factor. When the interaction is large, a combination between factors having an interaction must be added to the factor.
- FIG. 8 is measurement data showing the relationship between the capacity ratio of the electricity storage device and the operation time measured under the operation conditions of FIG. 6 in the second embodiment of the present invention. As shown in FIG. 8, it can be seen that the capacity ratio of the electricity storage device is greatly influenced by the operating conditions. It can also be seen that a proportional relationship does not necessarily hold between the capacity ratio of the electricity storage device and the operation time.
- the horizontal axis represents the operation time of the power storage device.
- the horizontal axis may be the charge / discharge frequency.
- FIG. 9 shows a regression equation obtained by curve fitting the measurement data of FIG. 8 in the second embodiment of the present invention.
- Regression equations y 1 to y 12 shown in FIG. 9 are obtained by calculating measurement data based on the operating conditions in the operating conditions 1 to 12 in FIG. It was created by curve fitting using a curve.
- y i ax + b
- Polynomial approximation: y i ax 4 + bx 3 + cx 2 + dx + e
- y i ax 1/2 + b
- the data analysis unit 35 creates regression equations y 1 to y 12 by curve fitting the measured data indicating the relationship between the measured capacity ratio of the power storage device and the operation time with an appropriate approximation function.
- the formula is created by applying the approximate formula based on the regression formulas y 1 to y 12 in FIG.
- an orthogonal polynomial shown in the following expression (1) can be used.
- orthogonal polynomials to be approximated include Laguerre's polynomial, Hermit's polynomial, Jacobi's polynomial, etc. in addition to the above-mentioned Chebyshev's equation.
- the average value y ( ⁇ ) of the evaluation characteristic y, the average value A ( ⁇ ) of the level, and the coefficient a 1 are respectively expressed by the following equations (3) to (3) using the regression equations y 1 to y 12. It is expressed as 5).
- the notation “( ⁇ )” means that a bar is added on the character before (), and represents an average value.
- life prediction formula creating unit 36 can be applied under general operating conditions other than the 12 types of operating conditions shown in FIG. 6 as shown in the above formulas (2) to (5).
- a prediction formula is created based on the regression formulas y 1 to y 12 .
- FIG. 10 is a diagram showing an estimated value, an actual measurement value, and an error of the estimated value of the capacity ratio of the electricity storage device after operating for 6000 hours under the operating condition of FIG. 6 in the second embodiment of the present invention.
- the estimated value shown in FIG. 10 is calculated by substituting the values of the respective factors in the operating conditions 1 to 12 shown in FIG. 6 into the above equation (6). Calculation was performed using Equation (7).
- the error of the estimated value is as small as less than 5%
- the life prediction formula according to the above equation (2) is that after operating for 6000 hours. It can be seen that the capacity ratio of the electricity storage device can be estimated with high accuracy.
- FIG. 11 shows the estimated value, the actual measurement value, and the capacity ratio of the electricity storage device after 6000 hours of operation under the operating conditions of FIG. 6 when the regression equation is created by linear approximation in the second embodiment of the present invention. It is a figure which shows the error of an estimated value.
- the estimated value shown in FIG. 11 was obtained using the above equation (6), and the error of the estimated value was obtained using the above equation (7).
- the estimated values are compared with the method of the present invention in which the regression equations y 1 to y 12 are created by curve fitting. It can be seen that the error of is large.
- the error of the estimated value in the operating condition 11 shown in FIG. 6 is as large as 21.24% in the case of linear approximation, compared with 3.57% in the case of curve fitting.
- creating the regression equations y 1 to y 12 by curve fitting is effective in estimating the evaluation characteristics with higher accuracy.
- the operation time when the capacity ratio y of the electricity storage device is 0.5 or less is defined as the life of the electricity storage device, the operation time when y in the above equation (2) is 0.5 or less is obtained by back calculation. do it.
- the current total operation time of the electricity storage device can be estimated by using the above equation (2). For this purpose, first, the capacity ratio of the current power storage device is measured, and then the operation time that is the value of the measured capacity ratio is obtained by back calculation. Furthermore, the remaining life of the electricity storage device can also be calculated by calculating the difference between the life of the electricity storage device and the current total operation time of the electricity storage device.
- the condition of the factor that maximizes the predicted lifetime value within the range that meets the usage conditions of the electricity storage device can be obtained.
- the condition of the factor that maximizes the life after 6000 hours may be determined so that the values of A to D are minimized and the values of E and F are maximized in Equation (6).
- FIG. 12 is an example showing specific set values for six factors as arbitrary operating conditions according to the second embodiment of the present invention.
- the values of the factors in these operating conditions 13 to 15 are not a combination of level 1 and level 2 shown in FIG. 4 above, but more general values are used.
- FIG. 13 is a diagram showing an estimated value, an actual measurement value, and an error of the estimated value of the capacity ratio of the electricity storage device after operating for 6000 hours under the operating conditions of FIG. 12 in the second embodiment of the present invention.
- the estimated value shown in FIG. 13 was obtained using the above equation (6)
- the error of the estimated value was obtained using the above equation (7).
- the life prediction formula according to the above equation (2) can accurately estimate the capacity ratio of the electricity storage device after 6000 hours of operation. I understand.
- a plurality of power storage devices are classified based on operating conditions set in advance according to the orthogonal array table with respect to a plurality of factors that affect the evaluation characteristics used for calculating the lifetime of the power storage device.
- the operation is controlled individually for the operating conditions.
- the life prediction operation control unit by performing operation control by the life prediction operation control unit using a plurality of different operation conditions according to the orthogonal arrangement table, the measurement data for each of the plurality of operation conditions is collected, and based on the collected measurement data Evaluation characteristics are calculated and sequentially stored in the storage unit as time-varying data.
- each of a plurality of operation conditions controlled according to the orthogonal array table is evaluated by curve fitting each of the time-varying data regarding the evaluation characteristics accumulated in the storage unit by the data collection unit with an appropriate approximation function.
- a regression equation showing the relationship between characteristics and operation time is created.
- a life prediction formula for calculating the predicted value of the evaluation characteristics when operating conditions arbitrarily set as a plurality of factors is created.
- Chebyshev's orthogonal polynomial as an approximate expression used in the life prediction formula (2), orthogonality is ensured even when there are a plurality of factor levels, and the life of the electricity storage device can be made more accurate under any operating condition. Can be predicted.
- two levels are set for six factors.
- measurement data based on each condition using two types of orthogonal tables for one evaluation characteristic is divided into cases where charging / discharging is not performed and cases where it is performed.
- Embodiment 3 In the third embodiment of the present invention, there is no function to control the operation of the electricity storage device by using the life prediction formula created based on the measurement data based on the accumulated operation conditions in the previous embodiment 2, but any The case where the life prediction for the operating conditions is performed offline will be described.
- FIG. 14 is a configuration diagram of the lifetime prediction apparatus for the electricity storage device according to the third embodiment of the present invention.
- the life prediction apparatus of FIG. 14 includes an offline life prediction unit 3a, a display unit 5, and an operation condition input unit 6.
- the life prediction formula calculation processing as shown in the second embodiment has already been performed, and there is no function for controlling the operation of the power storage device.
- life prediction for operating conditions can be performed offline. Therefore, the storage device life prediction apparatus shown in FIG. 14 includes the minimum components necessary for the storage device life prediction, excluding the components for driving the storage device.
- the storage device lifetime prediction apparatus shown in FIG. 14 includes only the offline lifetime prediction unit 3a and the display unit 5 among the components of the storage device lifetime prediction apparatus shown in FIG.
- An operation condition input unit 6 is provided for inputting the operation time, type, and operation condition of the target power storage device.
- a life prediction formula is created in advance in the offline life prediction unit 3a, and the operation time, type and operation condition of the power storage device to be measured are input from the operation condition input unit 6 to thereby store the power corresponding to the input content.
- the lifetime of the device is predicted and displayed on the display unit 5.
- the offline life prediction unit 3a uses the life prediction formula to obtain a time during which the capacity ratio of the power storage device is equal to or less than a predetermined capacity ratio, and uses this time as the life of the power storage device. Is displayed on the display unit 5.
- the remaining life of the power storage device can be displayed by obtaining the difference between the life of the power storage device and the operation time of the power storage device. Furthermore, it is possible to display the optimum operating conditions by inputting the set life.
- the life prediction for an arbitrary operation condition is performed offline by setting a life prediction formula calculated in advance.
- a storage device life prediction apparatus and a storage device lifetime prediction method that can be obtained can be obtained.
- the deterioration condition before the update is determined from the data such as the temperature, voltage, and current collected by the actual operation data collection unit 1, so that it depends on the updated operation condition. Deterioration can be predicted.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Medical Informatics (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
Description
特許文献1においては、出力電流及び端子間電圧の脈動振幅値を、出荷時の基本データと比較診断することにより、蓄電デバイスの寿命を予測している。しかしながら、蓄電デバイスの端子間電圧の脈動振幅は、電池の充電状態(以下、SOC:State Of Chargeと略す)に大きく影響される。このため、蓄電デバイスの端子間電圧の脈動振幅を正確に測定するためには、蓄電デバイスのSOCを正確に測定する必要がある。
図1は、本発明の実施の形態1における蓄電デバイスの寿命予測装置の構成図である。図1に示す蓄電デバイスの寿命予測装置は、実運転データ収集部1、劣化状態判定部2、寿命予測部3、実運転制御部4、及び表示部5を備えて構成される。
この実運転制御部4は蓄電デバイスの運転を制御する機能を有するコントローラであり、IT(Information Technoligy)を活用した電力やガス等のエネルギー管理システム(Energy Management System)であるxEMS((HEMS(Home Energy Management System)やBEMS(Building Energy Management System)やFEMS(Fuctory Energy Management System)など)や電気自動車やハイブリッド電気自動車のPCU(Power Control Unit)、PCS(Power Control Subsystem)、系統用蓄電池システムにおけるPLC(Programmable Logic controller)の全体若しくは一部の機能である。
また、本発明の実施の形態1における寿命予測装置は、多数の蓄電デバイスを直並列に接続しているシステムにおいてその効果をより発揮する。例えば複数の蓄電デバイスを直列に接続したユニットを並列接続しているシステムにおいては、劣化状態判定部2にてユニット毎の劣化状態を判定し、その結果に従って各ユニットへの入出力を制御することにより、並列接続されたユニット間の劣化を均等化し、システム全体としての劣化を抑制することができる。即ち、劣化量が大きいユニットに対しては入出力を抑制し、劣化量が小さいユニットの入出力を増加させることにより、劣化量が大きいユニットの劣化は抑制され、劣化量が小さいユニットの劣化が増えるため、全体のシステムとしての劣化を抑制することができる。
本発明の実施の形態2は、先の実施の形態1における寿命予測部3を具現化したものである。
採用された評価特性は、その初期値に対する比率として規格化し、この比率の閾値をもって寿命とすることが好ましい。複数の蓄電デバイスを評価する場合、運転開始前の初期の評価特性値が個体間にばらつきがあるため、個々の蓄電デバイスにおける劣化量を精度良く評価するために有効である。
運転条件1、2、3、5、6、8、9の場合
直線近似: yi=ax+b
運転条件7、11の場合
多項式近似: yi=ax4+bx3+cx2+dx+e
運転条件4、10、12の場合
平方根近似: yi=ax1/2+b
y=5.720417-0.0083914×A-5.177127×10-2×B-3.662888×10-2×C-0.858839×D+0.367459×E+1.070846×10-4×F (6)
実施の形態2においては6つの因子について2水準設定したが、充放電を行わない場合と行う場合に分け、一つの評価特性に対して2種類の直交表を用いて各々の条件に基づく測定データを収集して寿命予測を行うことができる。
即ち充放電を行わない場合の直交表の因子として、温度、保存SOCが考えられ、充放電を行う場合の直交表の因子としては例えば図4において時間のファクターである定電圧保持時間を除いた因子を設定する。
各々の直交表に基づき運転を行い、寿命予測式に基づいて充放電を行わない場合の劣化量(保存劣化量)、及び充放電を行う場合の劣化量(充放電劣化量)を求める。
充放電を行う時間と休止している時間に合わせて保存劣化量と充放電劣化量を積算することによりある一定期間における総劣化量を算出することにより、高精度な寿命予測が可能になる。
本発明の実施の形態3では、先の実施の形態2における蓄積された運転条件に基づく測定データを基に作成した寿命予測式を用いることによって、蓄電デバイスを運転制御する機能はないが、任意の運転条件に対する寿命予測をオフラインで実施する場合を説明する。
なお、運転期間中に運転条件が更新される場合は、実運転データ収集部1で収集した温度、電圧、電流等のデータから更新前の劣化状態を判定することにより、更新後の運転条件による劣化を予測することができる。
Claims (9)
- 蓄電デバイスの運転を制御する実運転制御部と、運転中の前記蓄電デバイスの測定データを収集する実運転データ収集部と、前記実運転データ収集部で収集した前記測定データを基に前記蓄電デバイスの劣化状態を判定する劣化状態判定部と、蓄電デバイスの寿命を予測する寿命予測部とを備えた蓄電デバイスの寿命予測装置であって、
前記寿命予測部は、
前記蓄電デバイスの寿命計算に用いる評価特性に影響を与える複数の因子に関してあらかじめ設定された運転条件に基づいて、前記蓄電デバイスを異なる複数の運転条件について個別に運転制御する寿命予測用運転制御部と、
前記異なる複数の運転条件を用いて前記寿命予測用運転制御部による運転制御を行うことで、前記複数の運転条件のそれぞれに対する測定データを収集し、収集した前記測定データに基づいて前記評価特性を算出して経時変化データとして記憶部に逐次蓄積するデータ収集部と、
前記データ収集部により前記記憶部に蓄積された前記評価特性に関する前記経時変化データのそれぞれを、適切な近似関数でカーブフィッティングすることにより、前記複数の運転条件のそれぞれについて、前記評価特性と運転時間との関係を示す回帰式を作成するデータ解析部と、
前記データ解析部により作成された前記回帰式を基に、前記複数の因子として任意設定された運転条件を用いた際の前記評価特性の予測値を算出する寿命予測式を作成する寿命予測式作成部と
を備える蓄電デバイスの寿命予測装置。 - 請求項1に記載の蓄電デバイスの寿命予測装置において、
前記寿命予測用運転制御部は、前記複数の運転条件として、前記複数の因子について直交配列表に基づいて設定されたそれぞれの運転条件を採用し、前記蓄電デバイスを運転制御し、
前記寿命予測式作成部は、前記直交配列表に従って運転制御された複数の前記運転条件において作成された複数の前記回帰式を基に、近似式に当てはめて前記寿命予測式を作成する
蓄電デバイスの寿命予測装置。 - 請求項2に記載の蓄電デバイスの寿命予測装置において、
前記近似式は、Chebyshevの直交多項式である
蓄電デバイスの寿命予測装置。 - 請求項1から3のいずれか1項に記載の蓄電デバイスの寿命予測装置において、
前記経時変化データのそれぞれは、その初期値に対する比率として規格化されている
蓄電デバイスの寿命予測装置。 - 請求項2に記載の蓄電デバイスの寿命予測装置において、
前記複数運転条件として、充放電を伴わない保存劣化と、充放電を伴う充放電劣化の、それぞれについて因子を設定して前記寿命予測式を作成し、運転パターンに応じて前記寿命予測式を組み合わせて一つの寿命予測式を作成する
蓄電デバイスの寿命予測装置。 - 請求項1から5のいずれか1項に記載の蓄電デバイスの寿命予測装置において、
前記実運転制御部は、実運転中に収集した測定データ及び前記寿命予測式を基に、前記蓄電デバイスの使用条件にあった範囲内で予測寿命値が最大になる複数の因子の値を求めて運転条件を更新し、更新した運転条件に基づいて前記蓄電デバイスを実運転制御する
蓄電デバイスの寿命予測装置。 - 請求項1から6のいずれか1項に記載の蓄電デバイスの寿命予測装置において、
前記劣化状態判定部は、運転期間中に運転条件が更新される場合は、前記実運転データ収集部で収集した前記測定データから更新前の劣化状態を判定することにより、更新後の運転条件による劣化を予測する
蓄電デバイスの寿命予測装置。 - 蓄電デバイスの運転時間、種類及び運転条件を入力データとして受け付ける運転条件入力部と、
請求項1に記載の蓄電デバイスの寿命予測装置によってあらかじめ作成された寿命予測式を記憶部に有し、前記寿命予測式及び前記運転条件入力部が受け付けた前記入力データを基に、前記蓄電デバイスの種類及び前記運転条件における前記蓄電デバイスの寿命予測値を算出するオフライン寿命予測部と、
前記オフライン寿命予測部で算出された前記寿命予測値を表示する表示部と
を備える蓄電デバイスの寿命予測装置。 - 請求項1に記載の蓄電デバイスの寿命予測装置に用いられる蓄電デバイスの寿命予測方法であって、
前記寿命予測部において、
前記蓄電デバイスの寿命計算に用いる評価特性に影響を与える複数の因子に関してあらかじめ設定された運転条件に基づいて、前記蓄電デバイスを異なる複数の運転条件について個別に運転制御する運転制御ステップと、
前記異なる複数の運転条件を用いて前記運転制御ステップによる運転制御を行うことで、前記複数の運転条件のそれぞれに対する測定データを収集し、収集した前記測定データに基づいて前記評価特性を算出して経時変化データとして記憶部に逐次蓄積するデータ収集ステップと、
前記データ収集ステップにより前記記憶部に蓄積された前記評価特性に関する前記経時変化データのそれぞれを、適切な近似関数でカーブフィッティングすることにより、前記複数の運転条件のそれぞれについて、前記評価特性と運転時間との関係を示す回帰式を作成する回帰式作成ステップと、
前記回帰式作成ステップにより作成された前記回帰式を基に、前記複数の因子として任意設定された運転条件を用いた際の前記評価特性の予測値を算出する寿命予測ステップと
を有する蓄電デバイスの寿命予測方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014554299A JP5936711B2 (ja) | 2012-12-26 | 2013-12-10 | 蓄電デバイスの寿命予測装置及び蓄電デバイスの寿命予測方法 |
US14/650,932 US9841464B2 (en) | 2012-12-26 | 2013-12-10 | Life prediction apparatus for electrical storage device and life prediction method for electrical storage device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-282201 | 2012-12-26 | ||
JP2012282201 | 2012-12-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014103705A1 true WO2014103705A1 (ja) | 2014-07-03 |
Family
ID=51020795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/083107 WO2014103705A1 (ja) | 2012-12-26 | 2013-12-10 | 蓄電デバイスの寿命予測装置及び蓄電デバイスの寿命予測方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US9841464B2 (ja) |
JP (1) | JP5936711B2 (ja) |
WO (1) | WO2014103705A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108845268A (zh) * | 2018-06-29 | 2018-11-20 | 深圳市科列技术股份有限公司 | 一种动力电池的老化趋势判断方法和装置 |
JP2020064031A (ja) * | 2018-10-19 | 2020-04-23 | トヨタ自動車株式会社 | 劣化情報出力装置および劣化情報出力方法 |
US10908223B2 (en) | 2018-03-20 | 2021-02-02 | Kabushiki Kaisha Toshiba | Battery safety evaluation apparatus, battery safety evaluation method, non-transitory storage medium, control circuit, and power storage system |
CN113125982A (zh) * | 2019-12-31 | 2021-07-16 | 比亚迪股份有限公司 | 电池寿命预测方法及装置 |
WO2022195701A1 (ja) * | 2021-03-16 | 2022-09-22 | 株式会社東芝 | 蓄電池管理装置、蓄電池管理方法、および、プログラム |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014145153A2 (en) * | 2013-03-15 | 2014-09-18 | Neeley John | Automatic recording and graphing of measurement data |
CN106654330B (zh) * | 2015-11-03 | 2019-03-12 | 大连融科储能技术发展有限公司 | 液流电池交流侧输入输出特性估算方法及其系统 |
DE102016107528A1 (de) * | 2016-04-22 | 2017-10-26 | CTC cartech company GmbH | Verfahren und System zur Bewertung einer elektrochemischen Speichereinheit |
CN106443495B (zh) * | 2016-12-07 | 2019-03-26 | 上海电气钠硫储能技术有限公司 | 一种能量型钠硫电池寿命检测方法 |
US20190033385A1 (en) | 2017-07-28 | 2019-01-31 | Northstar Battery Company, Llc | Systems and methods for determining a state of charge of a disconnected battery |
CN109325270A (zh) * | 2018-09-03 | 2019-02-12 | 中国电子产品可靠性与环境试验研究所((工业和信息化部电子第五研究所)(中国赛宝实验室)) | 磁控管自然贮存寿命预测方法 |
KR102276780B1 (ko) * | 2019-12-04 | 2021-07-12 | 중앙대학교 산학협력단 | 이차 전지 또는 연료 전지의 수명을 예측하는 방법 |
US20230004151A1 (en) * | 2021-07-01 | 2023-01-05 | Honeywell International Inc. | Run-time reliability reporting for electrical hardware systems |
CN113588452B (zh) * | 2021-07-30 | 2023-10-27 | 国网青海省电力公司信息通信公司 | 电缆寿命预测方法和装置以及处理器和存储介质 |
JP7385698B2 (ja) * | 2022-03-30 | 2023-11-22 | 本田技研工業株式会社 | バッテリ状態分析システム及びバッテリ状態分析方法 |
CN115967178B (zh) * | 2022-12-07 | 2023-09-05 | 贵州大学 | 一种储能系统运行的监测系统及方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009112113A (ja) * | 2007-10-30 | 2009-05-21 | Sony Corp | 電池パック、二次電池の充電方法、および充電装置 |
JP2010159661A (ja) * | 2009-01-07 | 2010-07-22 | Shin Kobe Electric Mach Co Ltd | 風力発電用蓄電池制御システム及びその制御方法 |
JP2011220900A (ja) * | 2010-04-12 | 2011-11-04 | Honda Motor Co Ltd | 電池劣化推定方法、電池容量推定方法、電池容量均等化方法、および電池劣化推定装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001188985A (ja) * | 1999-10-22 | 2001-07-10 | Toyota Motor Corp | 車両の走行診断方法及び走行条件提示方法及び車両の走行診断装置 |
JP4147589B2 (ja) | 2004-03-31 | 2008-09-10 | デンセイ・ラムダ株式会社 | バッテリー寿命予測装置とこれを用いた電源装置 |
JP4849935B2 (ja) | 2006-03-31 | 2012-01-11 | 古河電池株式会社 | 内部抵抗の初期値が不明な鉛蓄電池の寿命推定方法及び寿命推定装置 |
JP4802945B2 (ja) * | 2006-08-31 | 2011-10-26 | トヨタ自動車株式会社 | 二次電池の制御システムおよびそれを搭載したハイブリッド車両 |
US8471531B2 (en) * | 2007-03-20 | 2013-06-25 | Belkin International, Inc. | Estimated remaining life of a battery included in an uninterruptible power supply |
JP5393956B2 (ja) * | 2007-04-10 | 2014-01-22 | 三洋電機株式会社 | 電池の満充電容量検出方法 |
JP4668306B2 (ja) * | 2007-09-07 | 2011-04-13 | パナソニック株式会社 | 二次電池の寿命推定装置および二次電池の寿命推定方法 |
US20100312744A1 (en) * | 2009-06-09 | 2010-12-09 | Toyota Motor Engineering & Manufacturing North America, Inc. | System for battery prognostics |
US9013151B2 (en) * | 2010-03-26 | 2015-04-21 | Mitsubishi Electric Corporation | State-of-charge estimation apparatus |
JP2011208966A (ja) * | 2010-03-29 | 2011-10-20 | Nec Corp | 余命予測装置、そのコンピュータプログラムおよびデータ処理方法 |
EP2557428B1 (en) * | 2010-04-09 | 2015-07-01 | Toyota Jidosha Kabushiki Kaisha | Secondary battery degradation determination device and degradation determination method |
AU2010354957B2 (en) * | 2010-06-07 | 2014-04-17 | Mitsubishi Electric Corporation | Charge status estimation apparatus |
US9851412B2 (en) * | 2010-11-09 | 2017-12-26 | International Business Machines Corporation | Analyzing and controlling performance in a composite battery module |
US20150115969A1 (en) * | 2012-03-02 | 2015-04-30 | Hitachi Solutions, Ltd. | Storage battery analysis system, storage battery analysis method and storage battery analysis program |
-
2013
- 2013-12-10 JP JP2014554299A patent/JP5936711B2/ja active Active
- 2013-12-10 US US14/650,932 patent/US9841464B2/en not_active Expired - Fee Related
- 2013-12-10 WO PCT/JP2013/083107 patent/WO2014103705A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009112113A (ja) * | 2007-10-30 | 2009-05-21 | Sony Corp | 電池パック、二次電池の充電方法、および充電装置 |
JP2010159661A (ja) * | 2009-01-07 | 2010-07-22 | Shin Kobe Electric Mach Co Ltd | 風力発電用蓄電池制御システム及びその制御方法 |
JP2011220900A (ja) * | 2010-04-12 | 2011-11-04 | Honda Motor Co Ltd | 電池劣化推定方法、電池容量推定方法、電池容量均等化方法、および電池劣化推定装置 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10908223B2 (en) | 2018-03-20 | 2021-02-02 | Kabushiki Kaisha Toshiba | Battery safety evaluation apparatus, battery safety evaluation method, non-transitory storage medium, control circuit, and power storage system |
CN108845268A (zh) * | 2018-06-29 | 2018-11-20 | 深圳市科列技术股份有限公司 | 一种动力电池的老化趋势判断方法和装置 |
JP2020064031A (ja) * | 2018-10-19 | 2020-04-23 | トヨタ自動車株式会社 | 劣化情報出力装置および劣化情報出力方法 |
JP7110903B2 (ja) | 2018-10-19 | 2022-08-02 | トヨタ自動車株式会社 | 劣化情報出力装置および劣化情報出力方法 |
CN113125982A (zh) * | 2019-12-31 | 2021-07-16 | 比亚迪股份有限公司 | 电池寿命预测方法及装置 |
WO2022195701A1 (ja) * | 2021-03-16 | 2022-09-22 | 株式会社東芝 | 蓄電池管理装置、蓄電池管理方法、および、プログラム |
JP7536998B2 (ja) | 2021-03-16 | 2024-08-20 | 株式会社東芝 | 蓄電池管理装置、蓄電池管理方法、および、プログラム |
Also Published As
Publication number | Publication date |
---|---|
JP5936711B2 (ja) | 2016-06-22 |
JPWO2014103705A1 (ja) | 2017-01-12 |
US20150323611A1 (en) | 2015-11-12 |
US9841464B2 (en) | 2017-12-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5936711B2 (ja) | 蓄電デバイスの寿命予測装置及び蓄電デバイスの寿命予測方法 | |
Chen et al. | A new state-of-health estimation method for lithium-ion batteries through the intrinsic relationship between ohmic internal resistance and capacity | |
Pattipati et al. | Open circuit voltage characterization of lithium-ion batteries | |
CN107690585B (zh) | 用于确定锂硫电池组的健康状况和充电状态的方法和装置 | |
JP6556649B2 (ja) | 蓄電池評価装置、蓄電池、蓄電池評価方法、およびプログラム | |
KR101846690B1 (ko) | Wls 기반 soh 추정 시스템 및 방법 | |
KR101195515B1 (ko) | 전원장치용 상태검지장치, 전원장치 및 전원장치에사용되는 초기 특성 추출장치 | |
EP3018753B1 (en) | Battery control method based on ageing-adaptive operation window | |
CN103149535A (zh) | 用于在线确定电池的充电状态和健康状态的方法和装置 | |
KR20110084633A (ko) | 배터리의 수명 예측 장치 및 방법 | |
JPWO2014119328A1 (ja) | 電池状態推定装置 | |
JP2012122817A (ja) | 非水電解質二次電池の可逆容量推定方法、寿命予測方法、可逆容量推定装置、寿命予測装置及び蓄電システム | |
JP2020125968A (ja) | 電池劣化診断装置、電池劣化解析回路及び電池劣化診断プログラム | |
CN117836644A (zh) | 二次电池的健康状态估计方法、二次电池的健康状态估计程序及二次电池的健康状态估计装置 | |
CN116381535A (zh) | 用于在设备外部的中央单元中借助数字孪生高效监控设备电池组的电池组电池的方法和系统 | |
JP2015087344A (ja) | 容量劣化推定装置、蓄電装置および容量劣化推定方法 | |
JP6494431B2 (ja) | 蓄電デバイスの劣化診断装置 | |
Eleftheriadis et al. | Comparative study of machine learning techniques for the state of health estimation of li-ion batteries | |
Wu et al. | State-of-charge and state-of-health estimating method for lithium-ion batteries | |
CN117949851A (zh) | 一种电池状态联合估计方法及系统 | |
Liu et al. | Battery Loss Modelling Using Equivalent Circuits | |
JP5323396B2 (ja) | 入出力特性評価システム及びそれを組み込んだ充放電試験装置 | |
Raman et al. | Computationally efficient and accurate modeling of Li-ion battery | |
CN115667961A (zh) | 诊断电池的设备和方法 | |
KR102670278B1 (ko) | 배터리의 퇴화 상태를 진단하기 위한 시스템 및 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13869575 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014554299 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14650932 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13869575 Country of ref document: EP Kind code of ref document: A1 |