WO2022157866A1 - 蓄電池管理装置及び蓄電池管理方法 - Google Patents
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- 210000000352 storage cell Anatomy 0.000 title abstract 5
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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
-
- 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
-
- 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
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
-
- 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
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- Embodiments of the present invention relate to a storage battery management device and a storage battery management method.
- an object of the present invention is to provide a storage battery management device and a storage battery management method capable of presenting variations in the tendency of deterioration of storage batteries constituting a storage battery system. .
- a storage battery management device includes an acquisition unit that acquires battery characteristics and operation conditions of a storage battery device that includes a plurality of storage batteries, and data items included in the battery characteristics and the operation conditions acquired by the acquisition unit. Among them, a selection unit that selects a plurality of data values from a data value group of data items in which data values vary; an estimating unit for estimating the battery characteristics after the operation of the storage battery device for each data value selected by the selecting unit, and the battery characteristics estimated by the estimating unit in a state where the battery characteristics can be compared. and a display control unit for displaying.
- FIG. 1 is a diagram showing an example of the configuration of a storage battery system according to the first embodiment.
- FIG. 2 is a diagram showing an example of the configuration of the storage battery unit according to the first embodiment.
- FIG. 3 is a detailed configuration explanatory diagram of the cell module, CMU and BMU according to the first embodiment.
- FIG. 4 is a diagram showing an example of the hardware configuration of the storage battery control device according to the first embodiment.
- FIG. 5 is a diagram showing an example of the functional configuration of the storage battery control device according to the first embodiment.
- FIG. 6 is a diagram for explaining the operation of the first battery characteristic estimator according to the first embodiment.
- 7 is a diagram illustrating an example of a screen displayed by a display control unit according to the first embodiment;
- FIG. 1 is a diagram showing an example of the configuration of a storage battery system according to the first embodiment.
- FIG. 2 is a diagram showing an example of the configuration of the storage battery unit according to the first embodiment.
- FIG. 3 is a detailed configuration
- FIG. 8 is a diagram illustrating another example of a screen displayed by the display control unit according to the first embodiment
- FIG. 9 is a diagram illustrating another example of a screen displayed by the display control unit according to the first embodiment
- FIG. 10 is a diagram illustrating an example of processing executed by the storage battery control device of the first embodiment.
- FIG. 11 is a diagram illustrating an example of a functional configuration of a storage battery control device according to a second embodiment
- 12 is a diagram illustrating an example of a screen displayed by a display control unit according to the second embodiment
- FIG. FIG. 13 is a diagram illustrating an example of processing executed by the storage battery control device of the second embodiment.
- FIG. 14 is a diagram illustrating an example of a functional configuration of a storage battery control device according to a third embodiment
- FIG. 15 is a diagram illustrating an example of processing executed by the storage battery control device of the third embodiment
- FIG. 16 is a diagram illustrating an example of a configuration of a storage battery control device according to modification 1 of the third embodiment.
- FIG. 1 is a diagram showing an example of the configuration of a storage battery system according to the first embodiment.
- the storage battery system 1 has a commercial power supply 2 , a load 3 , a storage battery unit 4 , a storage battery control device 5 and a host control device 6 .
- the commercial power supply 2 supplies power to the storage battery unit 4 .
- the load 3 is a device that consumes power.
- the load 3 normally receives power supply from the commercial power supply 2 to operate, and when the power supply from the commercial power supply 2 is cut off, it operates by receiving power supply from the storage battery unit 4 .
- the storage battery unit 4 charges the power of the commercial power supply 2 and supplies power to the load 3 .
- the storage battery control device 5 is an example of a storage battery management device.
- the storage battery control device 5 controls the storage battery unit 4 .
- the storage battery control device 5 controls charging and discharging operations of the storage battery device 11 included in the storage battery unit 4 .
- the host control device 6 performs remote control of the storage battery control device 5 . Specifically, the host controller 6 acquires information indicating the power state and the like from the commercial power source 2 and the load 3 via a network (not shown), and outputs a charge/discharge command value to the storage battery control device 5 based on the acquired information. do.
- the storage battery control device 5 allocates the amount of charge and the amount of discharge for each battery unit or cell module (see FIG. 2) of the storage battery device 11, for example, based on the charge/discharge command value input from the host control device 6. It controls the charge/discharge operation of the device 11 .
- the above description is for the case where the storage battery unit 4 is operated as a backup power supply. Even if it is superimposed and supplied, application is possible in the same way. It can also be applied to stabilize power quality (voltage, frequency, etc.) when generating power using renewable energy (energy from sunlight, solar heat, hydropower, wind power, biomass, geothermal heat, etc.). .
- FIG. 2 is a diagram showing an example of the configuration of the storage battery unit 4.
- the storage battery unit 4 is roughly divided into a storage battery device 11 that stores electric power, and a PCS (Power Conditioning System) 12 that converts the DC power supplied from the storage battery device 11 into AC power having a desired power quality and supplies it to a load. and have.
- PCS Power Conditioning System
- the storage battery device 11 is roughly divided into a plurality of battery boards 21-1 to 21-N (N is a natural number) and a battery terminal board 22 to which the battery boards 21-1 to 21-N are connected.
- the battery boards 21-1 to 21-N include a plurality of battery units 23-1 to 23-M (M is a natural number) connected in parallel, a gateway device 24, and a BMU (Battery Management Unit) described later. device) and a DC power supply device 25 that supplies DC power for operation to the CMU (Cell Monitoring Unit).
- Each of the battery units 23-1 to 23-M is supplied with an output power source via a high potential side power supply line (high potential side power supply line) LH and a low potential side power supply line (low potential side power supply line) LL. It is connected to lines (output power line; bus line) LHO and LLO, and supplies power to the PCS 12, which is the main circuit.
- the battery unit 23-1 is roughly divided into a plurality of (24 in FIG. 2) cell modules 31-1 to 31-24 and a plurality of (24 in FIG. 2) provided in the cell modules 31-1 to 31-24, respectively.
- a plurality of cell modules 31-1 to 31-24, a service disconnect 33, a current sensor 34 and a contactor 35 are connected in series.
- the cell modules 31-1 to 31-24 constitute an assembled battery by connecting a plurality of battery cells in series and parallel.
- a plurality of cell modules 31-1 to 31-24 connected in series form an assembled battery group.
- the battery unit 23-1 also includes a BMU 36, and the communication lines of the CMUs 32-1 to 32-24 and the output line of the current sensor 34 are connected to the BMU 36.
- the BMU 36 controls the entire battery unit 23-1, and the result of communication with each CMU 32-1 to 32-24 (voltage data and temperature data described later) and the detection result of the current sensor 34 Based on this, the opening/closing control of the contactor 35 is performed.
- the battery terminal board 22 includes a plurality of board circuit breakers 41-1 to 41-N provided corresponding to the battery boards 21-1 to 21-N, and a master configured as a microcomputer that controls the entire storage battery device 11. (Master) device 42;
- control power line 51 supplied via the UPS (Uninterruptible Power System) 12A of the PCS 12, and a control communication configured as Ethernet (registered trademark) for exchanging control data. lines 52 and are connected.
- UPS Uninterruptible Power System
- FIG. 3 is an explanatory diagram of the detailed configuration of the cell module, CMU and BMU.
- Each of the cell modules 31-1 to 31-24 includes a plurality (10 in FIG. 3) of battery cells 61-1 to 61-10 connected in series.
- the CMUs 32-1 to 32-24 are voltage and temperature measurement ICs for measuring voltages and temperatures at predetermined locations of the battery cells 61-1 to 61-10 constituting the corresponding cell modules 31-1 to 31-24.
- CAN Controller Area Network
- AFE-IC Analog Front End IC
- MPU 63 that controls the entire CMU 32-1 to 32-24 corresponding to each
- BMU 36 and a memory 65 for storing voltage data and temperature data corresponding to the voltage of each cell.
- the BMU 36 also includes an MPU 71 that controls the entire BMU 36, a communication controller 72 that conforms to the CAN standard for performing CAN communication between the CMUs 32-1 to 32-24, and a and a memory 73 for storing the voltage data and the temperature data.
- each configuration including each of the cell modules 31-1 to 31-24 and the corresponding CMUs 32-1 to 32-24 is called a "battery module”.
- each configuration of the battery cells 61-1 to 61-10 is called a “battery cell”.
- each configuration of the battery units 23-1 to 23-M is called a “battery unit”.
- the battery unit, the battery module, and the battery cell are all examples of storage batteries.
- any one of the storage battery device 11, the battery unit, the battery module, and the battery cell will be simply referred to as a "storage battery”.
- FIG. 4 is a diagram showing an example of the hardware configuration of the storage battery control device 5.
- the storage battery control device 5 includes a processing section 91 , a storage section 92 , an input section 93 and a display section 94 .
- the storage battery control device 5 also has a communication interface for communicating with other devices (storage battery unit 4, host control device 6, etc.), but illustration and description thereof are omitted for the sake of simplicity.
- the processing unit 91 is a processor such as a CPU (Central Processing Unit) and controls the overall processing of the storage battery control device 5 .
- a CPU Central Processing Unit
- the storage unit 92 is a storage device such as ROM (Read Only Memory), RAM (Random Access Memory), HDD (Hard Disk Drive), SSD (Solid State Drive).
- the storage unit 92 stores various programs and setting information related to the operation of the storage battery control device 5 .
- the storage unit 92 is provided with a function to output the battery capacity of the storage battery at an arbitrary time and the battery characteristics such as SOH (State Of Health) as predicted values by inputting the battery characteristics and operating conditions of the storage battery. store the digital model 92a.
- SOH State Of Health
- the digital model 92a is, for example, data capable of simulating the operation and deterioration characteristics of a storage battery, and is realized by, for example, a simulator program.
- the digital model 92a reproduces the operation of the storage battery in a simulated manner based on the input battery characteristics and operating conditions. Output the time-series changes in characteristics as predicted values.
- the battery characteristics input to the digital model 92a include data items such as the battery capacity and internal resistance of the storage battery.
- the operating conditions to be input to the digital model 92a are, for example, the applied voltage of the storage battery, the input/output current, the SOC (State Of Cell), the temperature of the storage battery, or the temperature around the storage battery (hereinafter also collectively referred to as the environmental temperature). ) and other data items.
- the data items of the battery characteristics and operating conditions described above may be specified for each storage battery, or may be specified for the storage battery device 11 as a whole.
- the battery characteristics output by the digital model 92a indicate the battery characteristics after operation when the storage battery is operated under specified operating conditions.
- the digital model 92a predicts the battery characteristics of the storage battery device 11 from the time of shipment from the factory to a desired point in time. output as More specifically, the digital model 92a derives, as battery characteristics, the tendency of change in the battery capacity and internal resistance of the storage battery device 11 that deteriorates over time. In other words, the digital model 92a outputs information such as the SOH (State Of Health) of the storage battery device 11 that allows confirmation of the state of deterioration.
- SOH State Of Health
- the battery characteristics and operating conditions are assumed to be input in units of any one of battery units, battery modules, and battery cells.
- the battery capacity and internal resistance of the battery cells are input to the digital model 92a.
- the digital model 92a outputs battery characteristics as predicted values for a predetermined period of time or at a predetermined point in time, based on the input battery characteristics and operating conditions.
- the number of digital models 92a stored in the storage unit 92 is not limited to one, and may be plural.
- the storage unit 92 may store a plurality of digital models 92a prepared for each constituent unit of battery units, battery modules, and battery cells.
- the input unit 93 receives various input operations from the operator, converts the received input operations into electrical signals, and outputs the electrical signals to the processing unit 91 .
- the input unit 93 is implemented by, for example, a keyboard, mouse, or the like.
- the display unit 94 displays various information and screens under the control of the processing unit 91.
- the display unit 94 is implemented by, for example, a liquid crystal display or a CRT (Cathode Ray Tube) display.
- FIG. 5 is a diagram showing an example of the functional configuration of the storage battery control device 5. As shown in FIG. As shown in FIG. 5 , the storage battery control device 5 includes a first battery characteristic estimator 911 and a display controller 912 .
- Some or all of the functional units provided in the storage battery control device 5 may be implemented by a software configuration realized by the processing unit 91 executing a program stored in the storage unit 92 . Moreover, some or all of the functional units included in the storage battery control device 5 may be hardware configurations implemented by dedicated circuits included in the processing unit 91 and the like.
- the first battery characteristic estimation unit 911 is an example of an acquisition unit, a selection unit, and an estimation unit.
- the first battery characteristic estimation unit 911 estimates the battery state of the storage battery using the digital model 92a. Specifically, the first battery characteristic estimator 911 acquires the battery characteristic and operating conditions of the storage battery, and inputs them to the digital model 92a.
- the first battery characteristic estimator 911 may acquire battery characteristics and operating conditions stored in advance in the storage unit 92 or the like. Also, the first battery characteristic estimator 911 may acquire battery characteristics and operating conditions from the storage battery unit 4 or the host controller 6 . Also, the first battery characteristic estimator 911 may acquire battery characteristics and operating conditions input via the input unit 93 . In this embodiment, the first battery characteristic estimation unit 911 acquires initial characteristics as battery characteristics. Moreover, below, the operating conditions acquired by the first battery characteristic estimation unit 911 are also referred to as first operating conditions.
- the first battery characteristic estimation unit 911 inputs the acquired initial characteristics and the first operating conditions to the digital model 92a. Along with this, the digital model 92a outputs the chronological change in the initial characteristics when the storage battery is operated under the first operating condition as a predicted value.
- the first battery characteristic estimator 911 acquires the predicted value output by the digital model 92a as a first battery characteristic and outputs it as an estimation result. Note that the first battery characteristic estimator 911 may recursively input the first battery characteristic output by the digital model 92a to the digital model 92a as the changed battery characteristic.
- initial characteristics and first operating conditions are generally different for each storage battery.
- data values of initial characteristics and operating conditions vary due to differences in battery cell placement positions and manufacturing quality. Since such variations affect the tendency of deterioration, it is desirable in managing the storage battery device 11 to be able to check the state of deterioration of the battery characteristics for each storage battery.
- the first battery characteristic estimating unit 911 selects a data value group of data items having variations in data values among the items included in the initial characteristics and the first operating conditions obtained for each storage battery unit such as a battery cell. A plurality of data values are selected from and the selected data values are used to estimate a first battery characteristic.
- the first battery characteristic estimation unit 911 statistically analyzes the data value group of each item of battery characteristics and operating conditions to calculate the distribution of variation. For example, the first battery characteristic estimator 911 statistically analyzes a data value group of the environmental temperature obtained for each battery cell to calculate a distribution representing the variation of the environmental temperature.
- the type of distribution is not particularly limited, and normal distribution, uniform distribution, triangular distribution, or the like can be used.
- FIG. 6 is a diagram for explaining the operation of the first battery characteristic estimation unit 911.
- FIG. FIG. 6 shows an example of the distribution (normal distribution) calculated for the environmental temperature of the battery cell.
- the horizontal axis means the temperature distribution (environmental temperature distribution)
- the vertical axis means the probability density.
- the first battery characteristic estimation unit 911 selects data values to be input to the digital model 92a based on the distribution. For example, the first battery characteristic estimation unit 911 identifies data values (temperatures) with the maximum, minimum, and average probability densities, and selects at least two of these three data values. At this time, the first battery characteristic estimator 911 may select data values with the maximum, minimum, and average probability densities from the range of the standard deviation ⁇ .
- the first battery characteristic estimation unit 911 performs the above data value selection process for predetermined data items in which data values vary. may be selected. For example, the first battery characteristic estimator 911 may select a data value considering variations in any of the applied voltage, the input/output current, and the SOC.
- the data value selection method performed by the first battery characteristic estimation unit 911 is not limited to the above example, and other methods may be used. Alternatively, the first battery characteristic estimator 911 may select all data values (temperatures). Alternatively, the first battery characteristic estimator 911 may select data values at intervals of 5°C, 10°C, or the like.
- the first battery characteristic estimation unit 911 estimates, for each selected data value, the first battery characteristic when the storage battery is operated under the first operating condition based on the initial characteristic and the first operating condition. . Specifically, when the initial characteristics and the first operating conditions are input to the digital model 92a, the first battery characteristic estimating unit 911 inputs each of the selected data values individually, thereby estimating the first battery characteristics. Estimate for each data value.
- the first battery characteristic estimation unit 911 estimates the first battery characteristics for all combinations of data values with different data items.
- the display control unit 912 is an example of a display control unit.
- the display control unit 912 causes the display unit 94 to display the first battery characteristics estimated by the first battery characteristics estimation unit 911 . Specifically, the display control unit 912 displays the first battery characteristics estimated for each data value in a comparable state.
- FIG. 7 is a diagram showing an example of a screen displayed by the display control unit 912.
- the horizontal axis means time
- the vertical axis means the magnitude of the first battery characteristic (battery capacity).
- a solid line L11 and a dashed line L12 indicate the first battery characteristics estimated based on two different data values. Note that the display control unit 912 displays the lines L11 and L12 in a distinguishable state by differentiating the colors or the line types.
- the display control unit 912 arranges the line L11 and the line L12 on the same screen (graph) to display the first battery characteristics estimated for each data value in a comparable state.
- the display form of the first battery characteristics is not limited to the example in FIG.
- the display control unit 912 may display a screen showing, for each data value (temperature), the relationship between the first battery characteristic and the probability density of the data value in a comparable manner. .
- FIG. 8 is a diagram showing another example of the screen displayed by the display control unit 912.
- the horizontal axis means temperature.
- the left vertical axis indicates the magnitude of the first battery characteristic (battery capacity) represented by a bar graph.
- the vertical axis on the right indicates the magnitude of probability density represented by a line graph. Note that FIG. 8 shows the first battery characteristics for each temperature zone (5° C., etc.) estimated at a specific point in time.
- the display control unit 912 displays a screen that displays the data value (temperature) and the first battery characteristic in association with each other, and also displays the probability density (distribution) for each data value. Accordingly, the operator of the storage battery control device 5 can easily confirm the relationship between each temperature zone, the first battery characteristic, and the probability density by looking at the screen displayed on the display unit 94 .
- the screen displayed by the display control unit 912 is not limited to a two-dimensional graph, and may be a three-dimensional graph.
- the display control unit 912 may display a screen that three-dimensionally represents the first battery characteristics calculated for each data value, as shown in FIG.
- FIG. 9 is a diagram showing another example of the screen displayed by the display control unit 912.
- FIG. 9 shows a three-dimensional graph in which time, temperature, and first battery characteristics are assigned to each of three mutually orthogonal axes.
- lines L21 to L24 are estimation results of four first battery characteristics with different temperature conditions, and indicate that capacity deterioration progresses in different patterns.
- the display control unit 912 displays a screen that three-dimensionally represents the transition pattern of the first battery characteristic estimated for each data value in a comparable state.
- the operator of the storage battery control device 5 can easily compare transition patterns of the first battery characteristics calculated for each data value by looking at the screen displayed on the display unit 94 .
- FIG. 10 is a diagram showing an example of processing executed by the storage battery control device 5. As shown in FIG.
- the first battery characteristic estimator 911 acquires the initial characteristics and first operating conditions of the storage battery (step S11).
- the first battery characteristic estimating unit 911 calculates the distribution based on the data values of the data items in which the data values vary among the data items included in the initial characteristics and the first operating conditions acquired in step S11. Calculate (step S12). Next, the first battery characteristic estimator 911 selects at least two data values based on the distribution calculated in step S12 (step S13).
- the first battery characteristic estimation unit 911 uses the initial characteristic and the first operating condition acquired in step S11 and the data value selected in step S13 to estimate the first battery characteristic for each data value. (Step S14).
- the display control unit 912 causes the display unit 94 to display the first battery characteristics estimated for each data value in a state in which comparison is possible based on the estimation result of step S14 (step S15), and ends this process. .
- the storage battery control device 5 selects a plurality of data values from the data value group of the data items in which the data values vary among the data items included in the initial characteristics of the storage battery and the first operating condition. . Then, the storage battery control device 5 estimates the first battery characteristics for each selected data value based on the initial characteristics and the first operating conditions, and displays each of the estimated first battery characteristics in a comparable state.
- the storage battery control device 5 can present the first battery characteristics based on a plurality of data values with variations in a comparable state, so that the operator of the storage battery control device 5 can You can check the status.
- the storage battery control device 5 estimates the battery characteristics using the digital model 92a capable of simulating the operation and deterioration characteristics of the storage battery, it can cope with various operating conditions. It is possible to efficiently estimate the battery characteristics.
- the estimation result (first battery characteristic) of the first battery characteristic estimation unit 911 is displayed (output) on the display unit 94, but the output destination is not limited to this. do.
- the storage battery control device 5 may transmit (output) the estimation result of the first battery characteristic estimation unit 911 to the host control device 6 or the like.
- FIG. 11 is a diagram showing an example of the functional configuration of the storage battery control device 5a according to the second embodiment. It is assumed that the hardware configuration of the storage battery control device 5a is the same as that shown in FIG.
- the storage battery control device 5a includes a first battery characteristic estimator 911, a second battery characteristic estimator 921, and a display controller 922 as functional units.
- the first battery characteristic estimating section 911 and the second battery characteristic estimating section 921 are connected in multiple stages.
- the first battery characteristic estimator 911 is an example of a first estimator.
- the second battery characteristic estimator 921 is an example of a second estimator.
- the second battery characteristic estimating section 921 estimates the battery state of the storage battery device 11 using the digital model 92a. Specifically, the second battery characteristic estimator 921 acquires the first battery characteristic and the second operating characteristic derived by the first battery characteristic estimator 911, and inputs them to the digital model 92a.
- the first battery characteristics are derived for each of the plurality of data values with variations.
- the second operating condition indicates a future operating condition after the time when the first operating condition is applied. That is, the second battery characteristic estimation unit 921 uses the future battery characteristic from the first battery characteristic estimated by the first battery characteristic estimation unit 911 as the second battery characteristic, for each first battery characteristic (that is, for each data value) presume.
- the first battery characteristic estimating unit 911 based on the initial characteristic and the first operating condition, detects the time-series change of the initial characteristic from the operation of the storage battery device 11 to the present (current time). Derive properties.
- the second battery characteristic estimating unit 921 estimates a second battery characteristic indicating the battery characteristic from the present to an arbitrary point in the future based on the first battery characteristic and the second operating condition indicating the future operating condition. derive
- the second operating condition may be stored in advance in the storage unit 92 or the like, or may be input via the input unit 93.
- the digital model 92a used by the first battery characteristic estimating section 911 and the second battery characteristic estimating section 921 may be the same or different. Further, even when the first battery characteristic estimating unit 911 and the second battery characteristic estimating unit 921 use the same digital model 92a, the first battery characteristic estimating unit 911 and the second battery characteristic estimating unit 921 , the parameters related to the operation of estimating the battery characteristics may be varied.
- the display control unit 922 causes the display unit 94 to display the first battery characteristics estimated by the first battery characteristics estimation unit 911 and the second battery characteristics estimated by the second battery characteristics estimation unit 921 . Specifically, the display control unit 922 displays the first battery characteristic and the second battery characteristic estimated for each data value in a comparable state.
- FIG. 12 is a diagram showing an example of a screen displayed by the display control unit 922.
- the horizontal axis represents time
- the vertical axis represents the magnitude of battery characteristics (battery capacity).
- a solid line L11 and a dashed line L12 indicate the first battery characteristics estimated using two different data values. More specifically, the first battery characteristic represents the change in battery capacity from the start of operation to time Tn corresponding to the current time.
- Line L21 indicates the second battery characteristic estimated based on the first battery characteristic of line L11.
- the second battery characteristic of line L21 represents the change in battery capacity after time Tn.
- the display control unit 922 displays a series of line graphs by connecting the line L11 and the line L21 estimated based on the same data value at time Tn.
- a line L22 indicates the second battery characteristic estimated based on the first battery characteristic of the line L12.
- the second battery characteristic of line L22 represents the change in battery capacity after time Tn.
- the display control unit 922 connects the line L12 and the line L22 estimated based on the same data value at time Tn to display a series of line graphs.
- the display control unit 922 sets the first battery characteristic and the second battery characteristic estimated based on the same data value as a set, and displays each set in a comparable state.
- the operator of the storage battery control device 5a can easily check the variation in deterioration tendency of the storage battery and the range of battery capacity that the storage battery can take by looking at the screen displayed on the display unit 94.
- the screen displayed by the display control unit 922 is not limited to the example in FIG.
- the display control unit 922 may display screens representing the first battery characteristics and the second battery characteristics in the forms shown in FIGS. 8 and 9 described above.
- FIG. 13 is a diagram showing an example of processing executed by the storage battery control device 5a. Since steps S21 to S24 are the same as steps S11 to S14 described with reference to FIG. 10, description thereof will be omitted.
- the second battery characteristic estimation unit 921 acquires the first battery characteristic and second operating conditions (step S25).
- the second battery characteristic estimation unit 921 estimates the second battery characteristic using the first battery characteristic and the second operating condition (step S26).
- the second battery characteristic estimation unit 921 estimates the second battery characteristic for each first battery characteristic obtained in step S25.
- the display control unit 922 sets the first battery characteristics and the second battery characteristics estimated based on the same data value based on the estimation results of steps S24 and S26, and makes it possible to compare each set. state is displayed on the display unit 94 (step S27), and this process is terminated.
- the storage battery control device 5a selects a plurality of data values from the data value group of the data items in which the data values vary among the data items included in the initial characteristics of the storage battery and the first operating condition. .
- the storage battery control device 5a estimates the first battery characteristics for each selected data value based on the initial characteristics and the first operating conditions.
- the storage battery control device 5a estimates a future second battery characteristic in time series rather than the first battery characteristic, based on the first battery characteristic and the second operating condition. Then, the storage battery control device 5a pairs the first battery characteristic and the second battery characteristic estimated based on the same data value, and displays each pair in a comparable state.
- the storage battery control device 5a can present the first battery characteristics and the second battery characteristics based on each of the data values with variations in a state in which they can be compared, so that the operator of the storage battery control device 5a can It is possible to confirm the dispersion state of the deterioration tendency of the.
- the estimating unit is configured by arranging the first battery characteristic estimating unit 911 and the second battery characteristic estimating unit 921 in multiple stages, but the first battery characteristic estimating unit 911 (or the second battery characteristic estimating unit 921) alone can constitute an estimating unit.
- the first battery characteristic estimating unit 911 recursively inputs the self-estimated first battery characteristic together with the second quotation condition to itself, so that the same estimation result as the configuration of FIG. 11 described above is obtained. can be derived.
- the second battery characteristic estimator 921 does not perform data value selection processing. processing may be performed. For example, if there is a data item whose data value varies among the first battery characteristics and the second operating conditions output by the first battery characteristic estimating unit 911, the second battery characteristic estimating unit 921 A plurality of data values are selected from the data value group of the data item to estimate the second battery characteristic.
- the estimation results (first battery characteristics and second battery characteristics) of the first battery characteristic estimation unit 911 and the second battery characteristic estimation unit 921 are displayed (output) on the display unit 94.
- the output destination is not limited to this.
- the storage battery control device 5a may transmit (output) the estimation results of the first battery characteristic estimation section 911 and the second battery characteristic estimation section 921 to the host controller 6 or the like.
- FIG. 14 is a diagram showing an example of the functional configuration of the storage battery control device 5b according to the third embodiment. It is assumed that the hardware configuration of the storage battery control device 5b is the same as that shown in FIG.
- the storage battery control device 5b includes a first battery characteristic estimation unit 931, a change unit 932, and a display control unit 912 as functional units.
- the first battery characteristic estimator 931 has the same function as the first battery characteristic estimator 911 .
- the first battery characteristic estimator 931 may also estimate a battery state (hereinafter also referred to as a first battery state) related to the first battery characteristic together with the first battery characteristic.
- the first battery characteristic estimator 931 uses the environmental temperature, applied voltage, input/output current, and A first battery status including data items such as SOC is output.
- the data item of the first battery state described above may be defined for each storage battery, or may be defined for the entire storage battery device 11 .
- the changing unit 932 changes the battery characteristics or the first operating conditions to be input to the first battery characteristic estimating unit 931 based on the estimation result of the first battery characteristic estimating unit 931 and a predetermined target value.
- the changing unit 932 compares the first battery characteristic estimated by the first battery characteristic estimating unit 931 and the target battery characteristic, and if the difference exceeds the threshold, the difference The battery characteristics (initial characteristics) input to the first battery characteristic estimator 931 and the first operating conditions are changed according to the quantity. Then, the changing unit 932 repeatedly changes the battery characteristic or the first operating condition until the difference from the target value becomes equal to or less than the threshold.
- the object of comparison is not limited to the first battery characteristic, and the first battery state may be compared with the target value.
- the first battery characteristic estimation unit 931 can change either one or both of the battery characteristics and the first operating condition, but it may be configured to change the target specified via the input unit 93 or the like.
- the item to be changed by the first battery characteristic estimation unit 931 is not particularly limited, but it may be configured to change the item specified via the input unit 93 or the like.
- the amount of change that the first battery characteristic estimation unit 931 changes is not particularly limited. good.
- the display control unit 912 causes the display unit 94 to display the first battery characteristics derived by the first battery characteristics estimation unit 931 .
- the display control unit 912 cooperates with the changing unit 932 to display the first battery characteristic when the difference between the first battery characteristic and the target value is equal to or less than the threshold in the same manner as in the above-described embodiment. You may display on the display part 94 in a form.
- FIG. 15 is a diagram showing an example of processing executed by the storage battery control device 5b. Since steps S31 to S34 are the same as steps S11 to S14 described with reference to FIG. 10, description thereof will be omitted.
- the changing unit 932 compares the first battery characteristic with the target value, and determines whether the difference amount is equal to or less than the threshold. (Step S35). If the difference amount exceeds the threshold (step S35; No), the changing unit 932 changes the data value included in the initial characteristics or the first operating conditions to be input to the first battery characteristic estimating unit 931 (step S36), and step The process is returned to S32.
- step S35 if it is determined in step S35 that the amount of difference is within the threshold (step S35; Yes), the changing unit 932 shifts the process to step S37. Subsequently, the display control unit 912 causes the display unit 94 to display the first battery characteristics estimated for each data value based on the estimation result of step S34 in a state in which comparison is possible (step S37), and ends this process. do.
- the storage battery control device 5b changes the battery characteristic or the first operating condition according to the amount of difference.
- the storage battery control device 5b can bring the first battery characteristic or the first battery state closer to the target value.
- a first operating condition can be specified.
- the first battery characteristic estimating unit 931 that estimates the first battery characteristic is provided with the changing unit 932.
- a configuration in which a changing unit 932 is provided in the second battery characteristic estimating unit 921 may be employed.
- FIG. 16 is a diagram showing an example of the configuration of the storage battery control device 5b according to this modified example.
- the storage battery control device 5b has a configuration in which the second battery characteristic estimating section 921 of the configuration described in FIG. .
- the second battery characteristic estimation unit 941 may estimate the battery state related to the second battery characteristic (hereinafter also referred to as the second battery state) together with the second battery characteristic. Specifically, the second battery characteristic estimator 941 uses the battery temperature, battery voltage, battery current, SOC, and battery characteristics used when the digital model 92a calculates the second battery characteristics (battery capacity, internal resistance) at each time point. and other parameter values are output as the second battery state.
- the second battery characteristic estimator 941 uses the battery temperature, battery voltage, battery current, SOC, and battery characteristics used when the digital model 92a calculates the second battery characteristics (battery capacity, internal resistance) at each time point. and other parameter values are output as the second battery state.
- the changing unit 942 changes the second operating condition to be input to the second battery characteristic estimating unit 941 based on the estimation result of the second battery characteristic estimating unit 941 and the target value.
- the changing unit 942 compares the second battery characteristic or the second electric value state estimated by the second battery characteristic estimating unit 941 with the target value, and if the difference exceeds the threshold, the difference The second operating condition to be input to the second battery characteristic estimator 941 is changed according to the quantity. Then, the changing unit 942 repeatedly changes the second operating condition until the difference from the target value becomes equal to or less than the threshold.
- the changing unit 942 may change not only the second operating condition but also the battery characteristics and the first operating condition to be input to the first battery characteristic estimating unit 911 .
- the storage battery control device 5b changes the second operating condition and the like according to the amount of difference when the second battery characteristic or the second battery state differs from the target value.
- the storage battery control device 5b can bring the second battery characteristic or the second battery state closer to the target value. Conditions can be specified.
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Abstract
Description
図1は、第1の実施形態に係る蓄電池システムの構成の一例を示す図である。蓄電池システム1は、商用電源2と、負荷3と、蓄電池ユニット4と、蓄電池制御装置5と、上位制御装置6とを有する。
次に、第2の実施形態について説明する。なお、上述した実施形態の蓄電池制御装置5と同様の構成については、同一の符号を付与し説明を適宜省略する。
次に、第3の実施形態について説明する。なお、上述した実施形態の蓄電池制御装置5(5a)と同様の構成については、同一の符号を付与し説明を適宜省略する。
図14で説明した蓄電池制御装置5bでは、第1電池特性を推定する第1電池特性推定部931に、変更部932を設ける形態としたが、これに限らず、第2電池特性を推定する第2電池特性推定部921に、変更部932を設ける形態としてもよい。
Claims (14)
- 複数の蓄電池を含む蓄電池装置の電池特性と運用条件とを取得する取得部と、
前記取得部で取得された前記電池特性及び前記運用条件に含まれるデータ項目のうち、データ値にばらつきが存在するデータ項目のデータ値群から、複数のデータ値を選定する選定部と、
前記取得部で取得された前記電池特性及び前記運用条件に基づいて、当該運用条件で前記蓄電池装置が運用された場合での運用後の電池特性を、前記選定部で選定されたデータ値毎に推定する推定部と、
前記推定部で推定された前記電池特性を比較可能な状態で表示させる表示制御部と、
を備える蓄電池管理装置。 - 前記推定部は、前記蓄電池の動作及び劣化特性を模擬的に再現することが可能なデジタルモデルを用いて、運用条件で前記蓄電池装置が運用された場合での運用後の電池特性を推定する、請求項1に記載の蓄電池管理装置。
- 前記取得部は、前記推定部で推定された前記電池特性を新たな電池特性として取得するとともに、新たな運用条件を取得し、
前記推定部は、新たに取得された前記電池特性及び前記運用条件に基づいて、当該運用条件で前記蓄電池装置が運用された場合での運用後の電池特性を、前記選定部で選定されたデータ値毎に推定する、請求項1又は2に記載の蓄電池管理装置。 - 前記推定部は、前記電池特性を推定する第1推定部と第2推定部とを多段に有し、
前記第2推定部は、前記第1推定部で推定された前記電池特性を用いて、当該電池特性の時点より将来の電池特性を推定する、請求項3に記載の蓄電池管理装置。 - 前記選定部は、前記データ値群の分布に基づいて、複数のデータ値を選定する、請求項1に記載の蓄電池管理装置。
- 前記選定部は、前記データ値の最大値、最小値及び平均値の中から、少なくとも2点のデータ値を選定する、請求項1に記載の蓄電池管理装置。
- 前記電池特性は、前記蓄電池装置全体又は前記蓄電池の電池特性を示すデータ項目として、電池容量及び内部抵抗の何れか一方又は両方を含む、請求項1に記載の蓄電池管理装置。
- 前記運用条件は、前記蓄電池装置全体又は前記蓄電池の運用条件を示すデータ項目として、温度、印加電圧、印加電流及び充電率の何れか又は全てを含む、請求項1に記載の蓄電池管理装置。
- 前記表示制御部は、前記データ値毎に推定された前記電池特性の分布を表示させる、請求項1に記載の蓄電池管理装置。
- 前記表示制御部は、前記推定部で推定された前記電池特性の各々を識別可能な状態で表示させる、請求項1に記載の蓄電池管理装置。
- 前記推定部で推定された前記電池特性と所定の目標値との差分に応じて、前記推定部に入力する前記電池特性又は前記運用条件を変更する変更部を更に備える、請求項1に記載の蓄電池管理装置。
- 前記推定部は、前記電池特性を推定するとともに、当該電池特性に係る前記蓄電池装置全体又は前記蓄電池の電池状態を推定し、
前記変更部は、前記電池状態と所定の目標値との差分に応じて、前記推定部に入力する前記電池特性又は前記運用条件を変更する、請求項11に記載の蓄電池管理装置。 - 前記電池状態は、前記蓄電池装置全体又は前記蓄電池の、温度、印加電圧、印加電流及び充電率の何れか又は全てを含む、請求項12に記載の蓄電池管理装置。
- 複数の蓄電池を含む蓄電池装置の電池特性と運用条件とを取得する取得ステップと、
前記取得ステップで取得された前記電池特性及び前記運用条件に含まれるデータ項目のうち、データ値にばらつきが存在するデータ項目のデータ値群から、複数のデータ値を選定する選定ステップと、
前記取得ステップで取得された前記電池特性及び前記運用条件に基づいて、当該運用条件で前記蓄電池装置が運用された場合での運用後の電池特性を、前記選定ステップで選定されたデータ値毎に推定する推定ステップと、
前記推定ステップで推定された前記電池特性を比較可能な状態で表示させる表示制御ステップと、
を含む蓄電池管理方法。
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