WO2011039912A1 - 蓄電池装置並びに蓄電池の電池状態評価装置及び方法 - Google Patents
蓄電池装置並びに蓄電池の電池状態評価装置及び方法 Download PDFInfo
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- WO2011039912A1 WO2011039912A1 PCT/JP2010/004137 JP2010004137W WO2011039912A1 WO 2011039912 A1 WO2011039912 A1 WO 2011039912A1 JP 2010004137 W JP2010004137 W JP 2010004137W WO 2011039912 A1 WO2011039912 A1 WO 2011039912A1
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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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- 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
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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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- 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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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
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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 extends the battery life by, for example, accurately grasping the battery state (SOC: Sate of Charge) of a storage battery used for wind power generation fluctuation suppression in a wind power generation system, for example, of a system including a storage battery. It relates to making the cost low.
- SOC Sate of Charge
- wind power generation and solar power generation use natural energy and have the advantage that they do not emit carbon dioxide, they do not stabilize the power generation output because they let the wind or the weather leave them, which adversely affects the electric power system, electric power Deterioration in quality is a concern.
- wind power generation and solar power generation are introduced for the purpose of preventing such an adverse effect on the power system, it is required to simultaneously introduce a storage battery system.
- the power generation output by wind power generation fluctuates significantly depending on the wind conditions. If it is sent to the power system as it is, the power quality of the power system is adversely affected. Therefore, a storage battery system using a lead storage battery or the like outputs a storage system output according to the status of wind power generation output, and as a result, the power generation system combines the power generation output and the storage system output, and the system output becomes smooth. It is possible to avoid the adverse effect on power quality.
- Lead storage batteries for wind power generation output fluctuation control applications used for this purpose are required to have the same long life and cost reduction as wind power generation facilities.
- lead-acid batteries can extend their lifespan by maintaining appropriate operating conditions.
- Patent document 1 is known as a method for doing. In this method, the relational expression of the battery state of the storage battery mounted on the vehicle, the terminal voltage, and the current is obtained in advance, and the battery state at the time of idling stop is determined from the terminal voltage and current.
- Patent Document 2 when detecting the battery state of the storage battery, it is obtained from the relationship between the discharge voltage and the discharge current in the former region in the region where the battery state is high and low in the region, and the charge voltage in the latter region. There is disclosed a method of switching the determination method in order to obtain the relationship between the charging current and the charging current to improve the estimation accuracy.
- Patent Document 3 discloses a method of detecting a battery state from the relationship between an average voltage and current for a predetermined time.
- a relationship model of the battery state of the storage battery, the terminal voltage and the current is prepared in advance, and the current battery state of the storage battery is estimated from the current terminal voltage measurement value and the current measurement value. is there.
- the related method of the battery state of the storage battery can be created also by the conventional method, it is a model (single body) at the time of the storage battery new.
- the battery total battery capacity itself
- characteristics of the battery state are greatly changed (decreased) due to aging (deterioration)
- this point is not taken into consideration.
- the reason for this is that the degree of deterioration is not simply determined by the year, but changes depending on the operating conditions of the battery.
- the subject of the present invention is not only for a new battery but also for a lead storage battery that has been used for a certain period of time and has deteriorated, and a method that can accurately estimate the current battery state and
- An object of the present invention is to realize a storage battery device capable of prolonging life and cost reduction and a battery state evaluation device and method of the storage battery using information.
- the storage battery device of the present invention degrades a storage battery, a terminal voltage measurement unit that measures the terminal voltage of the storage battery, a current measurement unit that measures the current flowing through the storage battery, and a relationship model of the measured terminal voltage, current, and battery status Select the appropriate model from the multidimensional characteristic model based on the degree of deterioration obtained by the multidimensional characteristic model prepared for each degree, the deterioration degree estimation unit that estimates the current deterioration degree of the storage battery, and the deterioration degree estimation unit And a battery state estimation unit that estimates a current battery state using a model selected from the corresponding model selection unit.
- a storage battery In the storage battery device of the present invention, a storage battery, a terminal voltage measurement unit for measuring a terminal voltage of the storage battery, a current measurement unit for measuring a current flowing through the storage battery, and a first course for measuring the progress from the initial use of the storage battery
- a first multi-dimensional characteristic model in which a plurality of measurement models, a plurality of relationship models of terminal voltage / current and battery state at the time of charging are prepared for each degree of deterioration, and a first multiple
- a first selection means for selecting a characteristic model from a characteristic model in two dimensions; a first estimation unit for estimating a battery state from the characteristic model selected by the first selection means; and The second multi-dimensional characteristic model which prepares a plurality of relationship models of terminal voltage / current at the time of discharge and a battery state for the second progress measurement unit, and a second multi-dimensional characteristic model according to the output of the second progress measurement unit
- a second estimation unit for estimating a battery state
- the performance evaluation device of the storage battery degrades the relationship model between the terminal voltage measurement unit that measures the terminal voltage of the storage battery, the current measurement unit that measures the current flowing through the storage battery, and the measured terminal voltage, current and battery condition Select the appropriate model from the multidimensional characteristic model based on the degree of deterioration obtained by the multidimensional characteristic model prepared for each degree, the deterioration degree estimation unit that estimates the current deterioration degree of the storage battery, and the deterioration degree estimation unit And a battery state estimation unit that estimates a current battery state using a model selected from the corresponding model selection unit.
- the storage battery performance evaluation device includes a terminal voltage measurement unit that measures a terminal voltage of the storage battery, and a current measurement unit that measures a current flowing through the storage battery.
- a first progress measurement unit that measures the progress from the initial use of the storage battery, a first multidimensional characteristic model in which a plurality of relationship models of terminal voltage / current and battery state during charging are prepared for each degree of deterioration,
- First selecting means for selecting a characteristic model from a first multidimensional characteristic model according to the output of the first progress measuring unit; and first for estimating a battery state from the characteristic model selected by the first selecting means
- An estimation unit A second progress measurement unit for measuring the progress from the time of equal charge, a second multidimensional characteristic model in which a plurality of relationship models of terminal voltage / current and battery state at the time of discharge are prepared for each degree of deterioration;
- a second selection means for selecting a characteristic model from a second multidimensional characteristic model according to the output of the progress measurement unit, and a second estimation for estimating the battery state from the characteristic
- a plurality of models representing the relationship between the terminal voltage of the storage battery and the current and the battery state are prepared for each degradation degree of the storage battery, and the current degradation degree of the storage battery is estimated and estimated.
- a relationship model between the terminal voltage and current of the storage battery and the battery state is selected according to the degree of deterioration, and the current battery state is estimated using the selected model.
- a plurality of models each representing the relationship between the terminal voltage, the current and the battery state are prepared for charging and discharging the storage battery, and charging of the storage battery according to the operation progress of the storage battery
- the models at the time of discharge and at the time of discharge are respectively selected, and the current battery state is estimated from these models.
- the battery state is further estimated from the current integration, and the final battery is obtained from a plurality of battery states including the current battery state estimated from the model during charging and discharging of the storage battery.
- the state may be determined.
- the progress from the equal charge time may be used to determine the final battery state.
- the present invention even if a certain period of time has elapsed using a storage battery, it is possible to accurately grasp the battery state which largely differs depending on the use state (deterioration degree).
- the battery life can be extended by accurately grasping the battery state while taking into consideration the deterioration of the battery.
- By accurately grasping the battery state it is possible to widen the use range (SOC use range) and make it possible to use with less storage batteries (cost reduction). That is, it is possible to construct a storage battery for wind power generation and a storage battery system which realize long life and cost reduction by using battery state information accurately obtained while taking into consideration deterioration of the storage battery.
- the functional block diagram of the storage battery state evaluation apparatus of this invention includes a terminal voltage measurement unit 101, a current measurement unit 102, a multidimensional characteristic model 103, a deterioration degree estimation unit 104, a corresponding model selection unit 105, and a battery state estimation unit (SOC estimation unit) 106.
- SOC estimation unit battery state estimation unit
- Terminal voltage measurement unit 101 measures terminal voltage V of the lead storage battery.
- the current measuring unit 102 measures the current I flowing through the lead storage battery.
- Multidimensional characteristic model 103 prepares a relational model of terminal voltage V and current I and battery state (SOC) in multiple dimensions for each degree of deterioration, and this is prepared by examining characteristics of lead storage battery in advance deep.
- Deterioration degree estimation unit 104 estimates the present deterioration degree of the storage battery. As an indicator of the current degree of deterioration of the storage battery, there is a method of obtaining the total charge / discharge amount (total charge / discharge amount (Ah)) after the start of use.
- the corresponding model selection unit 105 is a model suitable for estimating the battery state from the multi-dimensional characteristic model 103 based on the current deterioration degree of the storage battery obtained by the deterioration degree estimation unit 104 (appropriately corresponding to the current deterioration degree) Select
- the battery state estimation unit 106 selects the model (V ⁇ I and the battery state selected by the corresponding model selection unit 105).
- the current battery state is estimated using the relationship model).
- the deterioration degree estimation unit 104 As an example of a method of estimating the present deterioration degree of the storage battery by the deterioration degree estimation unit 104, there is a method of obtaining the total charge / discharge amount (total charge / discharge amount (Ah)) after the start of use.
- the terminal voltage measurement unit 101 measures the terminal voltage V of the storage battery (step S201).
- the current measurement unit 102 measures the current I of the storage battery (step S202).
- the deterioration degree estimation unit 104 estimates the current deterioration degree of the storage battery (step S203).
- the relevant model selection unit 105 selects a relevant relationship model from the multi-dimensional characteristic model 103 based on the value (the current degradation degree of the storage battery) estimated by the degradation degree estimation unit 104 (step S204).
- the battery state estimation unit 106 uses the terminal voltage V of the storage battery measured by the terminal voltage measurement unit 101 (step S201), the current I of the storage battery measured by the current measurement unit 102 (step S202), and the corresponding model selection unit 105.
- the selected battery state is estimated using the selected model (step S205).
- a plurality of models representing the relationship between the terminal voltage and current of the storage battery and the battery state are prepared for each deterioration degree of the storage battery, and the current deterioration degree of the storage battery is estimated.
- the relationship model between the terminal voltage and current of the storage battery and the battery state can be selected according to the estimated degree of deterioration, and the current battery state can be estimated using the selected model.
- the battery state can be accurately estimated in accordance with
- Characteristic L1 shown in FIG. 5 shows an example of a discharge characteristic model when the battery is used under an environment where the degree of deterioration of the battery is 5%, the temperature is 25 ° C., and the discharge current is 8A.
- the vertical axis represents voltage V (terminal voltage V)
- the horizontal axis represents battery state (SOC).
- the multi-dimensional characteristic model 103 for each degree of deterioration is prepared by preparing a plurality of sets of characteristics L for other degrees of deterioration, and the optimum characteristic is determined according to the index of the measured degree of deterioration. It extracts and uses for judgment of a battery state.
- FIG. 3 shows a detailed functional block diagram of another embodiment of the storage battery state evaluation system of the present invention.
- This functional block includes three types of measurement units (101, 102, 301, 302), two types of multidimensional characteristic models (303, 304), two types of selection means (306, 307), A battery state estimation unit (305, 310, 311), one weight determination means (308), and a means (309) for finally determining the battery state.
- measurement units (101, 102, 301, 302) include a terminal voltage measurement unit 101, a current measurement unit 102, a measurement unit 301 after the initial use of the storage battery, and a measurement unit 302 after the equal charge. It is.
- the two types of multidimensional characteristic models are a multidimensional charge characteristic model 303 and a multidimensional discharge characteristic model 304.
- Two types of selection means are means 306 for selecting a model from the multi-dimensional charging characteristic model 303 according to the output of the elapsed time measuring unit 301 from the initial use of the storage battery, and It is a means 307 for selecting a model from the multi-dimensional discharge characteristic model 304 according to the output of the progress measurement unit 301.
- the three types of battery state (SOC) estimating units are the battery state estimating unit 305 based on current integration, the battery state estimating unit 310 based on the characteristics at the time of charging, and the estimation unit 311 based on the characteristics at the time of discharging. is there.
- the means 308 for determining the weights weights the outputs of the three types of battery state estimation units (305, 310, 311) according to the output of the progress measurement unit 302 after uniform charging.
- Terminal voltage measurement unit 101 measures terminal voltage V of the lead storage battery.
- the current measuring unit 102 measures the current I flowing through the lead storage battery.
- a lapse measuring unit 301 from the initial use of the storage battery measures a lapse from the initial use of the storage battery (for example, a total charge / discharge amount (Ah), a deterioration degree, an elapsed time, or the like).
- the progress measurement unit 302 from the time of uniform charging measures the progress (for example, time, total charge / discharge amount (Ah), etc.) after performing uniform charging of the storage battery.
- the multi-dimensional charge-time characteristic model 303 prepares a relational model of the terminal voltage V / current I at the time of charge and the battery state in a multi-dimensional manner for each progress (every deterioration degree) from the initial use of the storage battery. This is prepared in advance by examining characteristics of the lead battery at the time of charging.
- the multi-dimensional discharge time characteristic model 304 prepares a relational model of the terminal voltage V / current I at the time of discharge and the battery state SOC in multiple dimensions for each progress (every deterioration degree) from the initial use of the storage battery. . This is also prepared beforehand by examining the characteristics of the lead battery at the time of discharge.
- a non-patent document 1 describes a procedure for creating a model.
- Selection means 306 selects an appropriate model from the multi-dimensional charge characteristic model 303 in accordance with the value (current deterioration degree) of the progress measurement unit 301 from the initial use of the storage battery.
- Selection means 307 selects an appropriate model from the multi-dimensional discharge-time characteristic model 304 according to the value (current deterioration degree) of the progress measurement unit 301 from the initial use of the storage battery.
- the battery state estimation unit 305 from the current integration estimates the battery state from the integration of the current I from the time of uniform charging.
- the battery state estimation unit 310 Based on the terminal voltage V measured by the terminal voltage measurement unit 101 at the time of charging the storage battery, and the current I measured by the current measurement unit 102, the battery state estimation unit 310 based on the charging characteristic has a multidimensional charge characteristic model 303. The current battery state is estimated using the model selected by the selecting means 306.
- the battery state estimation unit 311 based on the discharge time characteristic has a multi-dimensional discharge time characteristic model 304 based on the terminal voltage V measured by the terminal voltage measurement unit 101 at the time of discharge of the storage battery and the current I measured by the current measurement unit 102.
- the current battery state is estimated using the model selected by the selecting means 307.
- the reliability of the value of the battery state obtained by the battery state estimation unit 305 from the current integration is relatively high.
- the reliability of the value of the battery state obtained by the battery state estimation unit 305 from the current integration becomes low.
- the battery state obtained by the battery state estimation unit 310 from the charge-time characteristics and the value obtained by the battery state estimation unit 311 from the discharge-time characteristics are further important.
- the weight of the battery state determined by the three types of battery state estimation units (305, 310, 311) changes depending on, for example, how much the ratio of "charge” and “discharge” was in a certain time from the present Therefore, the weight determination means 308 weights each value according to these conditions.
- the terminal voltage measurement unit 101 measures the terminal voltage V of the storage battery (step S401).
- the current measurement unit 102 measures the current I of the storage battery (step S402).
- the progress measuring unit 301 from the initial use of the storage battery measures (estimates) the current progress (deterioration degree) of the storage battery (step S403). Further, the progress measuring unit 302 after the equal charge time measures the progress from the time when the storage battery is fully charged by the equal charge to the present (step S404).
- the battery state estimation unit 305 based on current integration estimates the current battery state (step S405). This is to estimate the battery state by integrating the current I from the equal charge time.
- the selection means 306 selects a relevant relationship model from among the models of the charging time characteristic model 303 according to the result (elapsed degree / deterioration degree) obtained by the elapsed time measuring unit 301 from the initial use of the storage battery (step S406). ).
- the battery state estimation unit 310 based on the charge-time characteristic estimates the current battery state of the storage battery using the relationship model selected in step S406 (step S407).
- the selecting means 307 selects a relevant relationship model from among the models of the charging time characteristic model 304 according to the result (elapsed degree and deterioration degree) obtained by the elapsed time measuring unit 301 from the initial use of the storage battery. (Step S408).
- the battery state estimation unit 311 based on the characteristics at the time of discharge estimates the current battery state of the storage battery using the relationship model selected in step S408 (step S409).
- the means 308 for determining the weight determines the battery state obtained in step S405, step S407, and step S409 based on the result (elapsed from the time of equal charge) obtained by the elapsed time estimation unit 302 from the time of equal charge.
- the weight (reliability) to be assigned is determined (step S410).
- step S410 the weight determined in step S410 is given to the battery state obtained in step S405, step S407, and step S409, and the battery state of the battery is finally determined.
- a plurality of models each representing the relationship between the terminal voltage, the current, and the battery state are prepared for charging and discharging the storage battery. Accordingly, models for charging and discharging the storage battery can be respectively selected, and the current battery state can be estimated from these models, so that the battery state can be estimated more accurately.
- the battery state can also be estimated from the current integration, and the final battery state can be determined from a plurality of battery states including the current battery state estimated from the model during charging and discharging of the storage battery.
- the progress from the equal charge time can be used to determine the final battery state from multiple battery states.
- FIG. 6 shows an example of the multi-dimensional discharge characteristic model of FIG. 3 and shows the characteristics when the discharge current is 8A to 12A in a working environment with a deterioration degree of 5% and a temperature of 25 ° C., for example. .
- the multi-dimensional characteristic model is prepared by preparing a plurality of sets of the plurality of characteristics from the viewpoint of the result (the degree of deterioration and the degree of deterioration) obtained by the measurement unit 301.
- FIG. 7 shows an example of the multi-dimensional charge characteristic model of FIG. 3, and shows characteristics when the charge current is 8A to 12A in a working environment with a deterioration degree of 5% and a temperature of 25.degree. C., for example.
- the multi-dimensional characteristic model is prepared by preparing a plurality of sets of the plurality of characteristics from the viewpoint of the result (the degree of deterioration and the degree of deterioration) obtained by the measurement unit 302.
- multi-dimensional characteristic models for charging or discharging can also be expanded to multi-dimensional models from the viewpoint of the degree of deterioration in FIG. 5, and as shown in FIG. 6 and FIG. It is also possible to develop into a model, and further it is also possible to deploy into a multidimensional model according to the temperature of the environment in which the storage battery is placed.
- the multi-dimensional model considered from these aspects is actually configured by a computer, it is effective to estimate the current battery state by providing a model developed with as many functions as possible.
- the battery state evaluation apparatus of the storage battery of the above this invention can be implemented separately from the storage battery, for example, by a remote computer apparatus. Moreover, it can also be realized by installing a battery state evaluation device at a storage battery installation place of a site and setting it as a storage battery device capable of performance check on the spot.
- the battery capacity of the storage battery can be grasped in detail, it is possible to construct, for example, a storage battery system for wind power generation which realizes long life and cost reduction.
- terminal voltage measurement unit 102 current measurement unit 301: progress measurement unit 302 from initial use of storage battery: progress measurement unit 302 from equal charge 303: multi-dimensional charge characteristic model 304: multi-dimensional discharge characteristic model 306, 307: selection means 305, 310, 311: battery state estimation unit 308: weight determination means 309: battery state determination means
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Abstract
Description
鉛蓄電池の電池状態を正確に把握するための方法として、特許文献1が知られている。
本方法では、車両に搭載された蓄電池の電池状態と端子電圧、電流の関係式を事前に求めておき、アイドリングストップ時の電池状態を端子電圧・電流より判定するというものである。
電流積算から電池状態を推定する第三の推定部と、第二の経過測定部で求めた均等充電時の経過から、第一の推定部と第二の推定部と第三の推定部の出力にそれぞれ付与する重みを決定する重み決定手段と、重み決定手段で求めた重みを考慮した第一の推定部と第二の推定部と第三の推定部の出力に応じて最終的に電池状態を決定する決定手段とから構成される。
蓄電池初期使用時からの経過を測定する第一の経過測定部と、充電時の端子電圧・電流と電池状態の関係モデルを劣化度ごとに複数用意した第一の多次元の特性モデルと、第一の経過測定部の出力に応じて第一の多次元の特性モデルから特性モデルを選択する第一の選択手段と、第一の選択手段で選択した特性モデルから電池状態を推定する第一の推定部と、
均等充電時からの経過を測定する第二の経過測定部と、放電時の端子電圧・電流と電池状態の関係モデルを劣化度ごとに複数用意した第二の多次元の特性モデルと、第二の経過測定部の出力に応じて第二の多次元の特性モデルから特性モデルを選択する第二の選択手段と、第二の選択手段で選択した特性モデルから電池状態を推定する第二の推定部と、
電流積算から電池状態を推定する第三の推定部と、
第二の経過測定部で求めた均等充電時の経過から、第一の推定部と第二の推定部と第三の推定部の出力にそれぞれ付与する重みを決定する重み決定手段と、
重み決定手段で求めた重みを考慮した第一の推定部と第二の推定部と第三の推定部の出力に応じて最終的に電池状態を決定する決定手段と
から構成してもよい。
102:電流測定部
301:蓄電池初期使用時からの経過測定部
302:均等充電時からの経過測定部302
303:多次元の充電時特性モデル
304:多次元の放電時特性モデル
306,307:選択手段
305,310,311:電池状態推定部
308:重み決定手段
309:電池状態決定手段
Claims (8)
- 蓄電池と、
該蓄電池の端子電圧を測定する端子電圧測定部と、前記蓄電池に流れる電流を測定する電流測定部と、測定された端子電圧、電流と電池状態の関係モデルを劣化度ごとに複数用意した多次元の特性モデルと、前記蓄電池の現在の劣化度を推定する劣化度推定部と、該劣化度推定部が求めた劣化度に基き、前記多次元特性モデルから該当するモデルを選定する該当モデル選定部と、該当モデル選定部から選定したモデルを用いて現在の電池状態を推定する電池状態推定部とから構成されることを特徴とする蓄電池装置。 - 蓄電池と、
該蓄電池の端子電圧を測定する端子電圧測定部と、前記蓄電池に流れる電流を測定する電流測定部と、
蓄電池初期使用時からの経過を測定する第一の経過測定部と、充電時の端子電圧・電流と電池状態の関係モデルを劣化度ごとに複数用意した第一の多次元の特性モデルと、前記第一の経過測定部の出力に応じて前記第一の多次元の特性モデルから特性モデルを選択する第一の選択手段と、該第一の選択手段で選択した特性モデルから電池状態を推定する第一の推定部と、
均等充電時からの経過を測定する第二の経過測定部と、放電時の端子電圧・電流と電池状態の関係モデルを劣化度ごとに複数用意した第二の多次元の特性モデルと、前記第二の経過測定部の出力に応じて前記第二の多次元の特性モデルから特性モデルを選択する第二の選択手段と、該第二の選択手段で選択した特性モデルから電池状態を推定する第二の推定部と、
電流積算から電池状態を推定する第三の推定部と、
前記第二の経過測定部で求めた均等充電時の経過から、前記第一の推定部と前記第二、の推定部と第三の推定部の出力にそれぞれ付与する重みを決定する重み決定手段と、
該重み決定手段で求めた重みを考慮した前記第一の推定部と前記第二の推定部と第三の推定部の出力に応じて最終的に電池状態を決定する決定手段と
から構成される蓄電池装置。 - 蓄電池の端子電圧を測定する端子電圧測定部と、前記蓄電池に流れる電流を測定する電流測定部と、測定された端子電圧、電流と電池状態の関係モデルを劣化度ごとに複数用意した多次元の特性モデルと、前記蓄電池の現在の劣化度を推定する劣化度推定部と、該劣化度推定部が求めた劣化度に基き、前記多次元特性モデルから該当するモデルを選定する該当モデル選定部と、該当モデル選定部から選定したモデルを用いて現在の電池状態を推定する電池状態推定部とから構成されることを特徴とする蓄電池の電池状態評価装置。
- 蓄電池の端子電圧を測定する端子電圧測定部と、前記蓄電池に流れる電流を測定する電流測定部と、
蓄電池初期使用時からの経過を測定する第一の経過測定部と、充電時の端子電圧・電流と電池状態の関係モデルを劣化度ごとに複数用意した第一の多次元の特性モデルと、前記第一の経過測定部の出力に応じて前記第一の多次元の特性モデルから特性モデルを選択する第一の選択手段と、該第一の選択手段で選択した特性モデルから電池状態を推定する第一の推定部と、
均等充電時からの経過を測定する第二の経過測定部と、放電時の端子電圧・電流と電池状態の関係モデルを劣化度ごとに複数用意した第二の多次元の特性モデルと、前記第二の経過測定部の出力に応じて前記第二の多次元の特性モデルから特性モデルを選択する第二の選択手段と、該第二の選択手段で選択した特性モデルから電池状態を推定する第二の推定部と、
電流積算から電池状態を推定する第三の推定部と、
前記第二の経過測定部で求めた均等充電時の経過から、前記第一の推定部と前記第二、の推定部と第三の推定部の出力にそれぞれ付与する重みを決定する重み決定手段と、
該重み決定手段で求めた重みを考慮した前記第一の推定部と前記第二の推定部と第三の推定部の出力に応じて最終的に電池状態を決定する決定手段と
から構成される蓄電池の電池状態評価装置。 - 蓄電池の端子電圧と電流と電池状態の関係を表すモデルを前記蓄電池の劣化度ごとに複数用意し、前記蓄電池の現在の劣化度を推定し、推定した劣化度に応じた前記蓄電池の端子電圧と電流と電池状態の関係モデルを選択し、選択したモデルを用いて、現在の電池状態を推定する蓄電池の電池状態評価方法。
- 蓄電池の充電時と放電時について、端子電圧と電流と電池状態の関係を表すモデルをそれぞれ複数用意し、前記蓄電池の運転経過に応じて蓄電池の充電時と放電時のモデルをそれぞれ選択し、これらのモデルから現在の電池状態を推定する蓄電池の電池状態評価方法。
- 請求項6記載の蓄電池の電池状態評価方法において、さらに電流積算からも電池状態を推定し、前記蓄電池の充電時と放電時のモデルから推定した現在の電池状態を含めた複数の電池状態から最終的な電池状態を決定することを特徴とする蓄電池の電池状態評価方法。
- 請求項7記載の蓄電池の電池状態評価方法において、前記複数の電池状態から最終的な電池状態の決定のために均等充電時からの経過を使用することを特徴とする蓄電池の電池状態評価方法。
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