WO2022181680A1 - 遠隔監視システム、蓄電池システムおよび遠隔監視システムの制御方法 - Google Patents
遠隔監視システム、蓄電池システムおよび遠隔監視システムの制御方法 Download PDFInfo
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- WO2022181680A1 WO2022181680A1 PCT/JP2022/007578 JP2022007578W WO2022181680A1 WO 2022181680 A1 WO2022181680 A1 WO 2022181680A1 JP 2022007578 W JP2022007578 W JP 2022007578W WO 2022181680 A1 WO2022181680 A1 WO 2022181680A1
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- storage battery
- operation history
- history data
- remote monitoring
- monitoring system
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000006866 deterioration Effects 0.000 claims abstract description 27
- 238000013500 data storage Methods 0.000 claims abstract description 15
- 238000007405 data analysis Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims description 51
- 238000010586 diagram Methods 0.000 description 18
- 230000005856 abnormality Effects 0.000 description 16
- 238000012423 maintenance Methods 0.000 description 9
- 238000007726 management method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 5
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- 230000004048 modification Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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Images
Classifications
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
- G16Y10/00—Economic sectors
- G16Y10/40—Transportation
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
- G16Y20/00—Information sensed or collected by the things
- G16Y20/20—Information sensed or collected by the things relating to the thing itself
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
- G16Y40/00—IoT characterised by the purpose of the information processing
- G16Y40/20—Analytics; Diagnosis
-
- 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
- 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
- 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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- 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 remote monitoring system, a storage battery system, and a remote monitoring system control method.
- Storage batteries such as lithium-ion batteries differ greatly in their rate of deterioration depending on load conditions such as temperature, charging rate, and current.
- load conditions such as temperature, charging rate, and current.
- the temperature transition of the battery cells during operation changes due to differences in cooling conditions caused by the arrangement of the battery cells.
- Patent Documents 1 and 2 can reflect the actual load conditions of the storage battery, if the accuracy of the deterioration prediction model is not sufficient, the limit value cannot be changed appropriately. .
- one representative remote monitoring system of the present invention comprises a plurality of storage battery systems and an external server.
- the external server then has a data storage unit that stores operation history data of storage batteries received from multiple storage battery systems, analyzes the operation history data stored in the data storage unit, and calculates parameters necessary for predicting deterioration of storage batteries. and a life prediction unit that predicts the life of the storage battery of each storage battery system using the parameters calculated by the operation history data analysis unit and the operation history data received from each storage battery system. .
- FIG. 1 is a diagram showing the configuration of a remote monitoring system according to an embodiment.
- FIG. 2 is a diagram showing an example of a method of predicting the life of a storage battery in each storage battery system.
- FIG. 3 is a diagram showing an example of a method for predicting the life of a storage battery in each storage battery system.
- FIG. 4 is a diagram showing an example of a method of predicting the life of a storage battery in each storage battery system.
- FIG. 5 is a diagram showing an example of a method for predicting the life of a storage battery in each storage battery system.
- FIG. 6 is a flowchart illustrating processing of an external server according to the embodiment.
- FIG. 7 is a diagram illustrating storage/transmission of operation history data by the wireless communication device according to the embodiment.
- FIG. 1 is a diagram showing the configuration of a remote monitoring system according to an embodiment.
- FIG. 2 is a diagram showing an example of a method of predicting the life of a storage battery in each storage battery
- FIG. 8 is a diagram illustrating storage/transmission of operation history data by the wireless communication device according to the embodiment.
- FIG. 9 is a diagram showing the configuration of a remote monitoring system according to a modification.
- FIG. 10 is a diagram showing an example of notification contents by mail.
- FIG. 11 is a flowchart showing processing of the external server according to the modification.
- FIG. 1 is a diagram showing the configuration of a remote monitoring system according to an embodiment.
- the remote monitoring system consists of multiple storage battery systems 100 and an external server 200.
- the number of storage battery systems 100 is not particularly limited as long as it is plural.
- the storage battery system 100 is basically composed of one or more storage batteries 101 , a battery management device 102 , a charge/discharge control device 103 and a wireless communication device 104 .
- the storage battery 101 is composed of, for example, a lithium ion battery, a lead storage battery, a nickel hydrogen battery, a nickel cadmium battery, etc., but the type of storage battery is not limited to these.
- the battery management device 102 is a device that can monitor the state of the storage battery 101 from information obtained by a sensor or the like, and can send operation history data and the like of the storage battery 101 to the wireless communication device 104 .
- the temperature sensor of the storage battery 101 may be used for measurement for each battery cell, for each battery module, or for representative measurement points. There is no particular limit to the number of temperature measurement points.
- the battery management device 102 can receive the limit value and the like of the storage battery 101 from the wireless communication device 104 and send information necessary for charge/discharge control to the charge/discharge control device 103 .
- the limit value of the storage battery means a numerical value related to the use limit of the storage battery, such as the current upper limit value and the charging rate range, but is not limited to these.
- the charge/discharge control device 103 is a device that can control charge/discharge of the storage battery 101 and can receive information necessary for charge/discharge control from the battery management device 102 .
- the wireless communication device 104 can accumulate operation history data of the storage battery 101 received from the battery management device 102 and transmit the operation history data to the external server 200 by wireless communication. Also, the wireless communication device 104 can receive the limit value of the storage battery 101 from the external server 200 by wireless communication and send the limit value to the battery management device 102 .
- wireless communication device 104 and the battery management device 102 may be configured as one device, or may be configured as individual devices.
- the operation history data that the wireless communication device 104 transmits to the external server 200 includes current, power, voltage, charging rate, temperature, air temperature, capacity retention rate, resistance increase rate, diagram, position information, vehicle weight, passenger rate, passenger This includes, but is not limited to, personnel.
- the external server 200 is composed of a data storage unit 201, an operation history data analysis unit 202, a life prediction unit 203, and a limit value determination unit 204, but may include elements other than these.
- the data storage unit 201 can collect and store operation history data of the storage battery 101 received from the plurality of storage battery systems 100 .
- the operation history data analysis unit 202 can statistically analyze the operation history data stored in the data storage unit 201 and update parameters necessary for predicting deterioration of the storage battery 101 .
- Methods for calculating the parameters include, but are not limited to, a method of calculating using a predetermined calculation formula, a method of using a table in which pre-calculated results are accumulated, and the like.
- the accuracy of statistical analysis of operation history data can be improved, and the parameters necessary for predicting deterioration of the storage battery 101 can be made highly accurate.
- the life prediction unit 203 can predict the life of the storage battery 101 of each storage battery system 100 using the parameters calculated by the operation history data analysis unit 202 and the operation history data received from each storage battery system 100 .
- the predicted service life of the storage battery 101 of each storage battery system 100 can be improved.
- Fig. 2 is a diagram showing a method for predicting the life of a storage battery from changes in battery temperature.
- the vertical axis represents battery temperature [°C], and the horizontal axis represents elapsed years [years].
- the small circle indicates the highest daily battery temperature measurement. Although this maximum value fluctuates depending on the temperature and operating conditions, it increases or decreases depending on the season and rises as the storage battery deteriorates.
- the dotted line indicates the tangent line drawn to the upper limit of this highest value (upper tangent line).
- a dashed line indicates a threshold (overtemperature abnormality threshold) for determining an overtemperature abnormality.
- the timing at which the temperature of the storage battery exceeds the overtemperature abnormality threshold is defined as the life, and the intersection point (large circle) of the dotted line and the dashed line is obtained as the overtemperature abnormality occurrence prediction point, that is, the predicted life.
- the temperature measurement value may be the temperature measurement value of each battery cell in the storage battery system, or may be the temperature measurement value of a part of the battery cells.
- the slope and intercept of the upper limit tangent line in FIG. If the measured temperature value near the upper limit is a low value due to air temperature or operating conditions, the slope and intercept of the upper limit tangent line can be obtained by referring to the temperature measured values of other storage battery systems.
- FIG. 3 is a diagram showing a method of predicting the life of the storage battery from the transition of the estimated charging rate.
- the vertical axis is the charging rate [%], and the horizontal axis is the elapsed years [years].
- the small circles indicate the lowest estimated battery state-of-charge for each day. This minimum value decreases as the storage battery deteriorates.
- a dotted line indicates a tangent line drawn to the lower bound of this lowest value (lower bound tangent).
- a dashed line indicates a threshold value (electricity shortage abnormality threshold value) for determining an electricity shortage abnormality.
- the timing at which the estimated value of the charging rate of the storage battery falls below the power shortage abnormality threshold is defined as the life, and the intersection point (large circle) of the dotted line and the dashed line is obtained as the power shortage abnormality occurrence prediction time, that is, the predicted life.
- the lowest value of the estimated charging rate may be the lowest value of the estimated charging rate of each battery cell or each battery module in the battery system, or the estimated charging rate of some battery cells or some battery modules. It can be the lowest value.
- FIG. 4 is a diagram showing a method of predicting the life of a storage battery from changes in the estimated capacity maintenance rate.
- the vertical axis is the capacity maintenance rate [%], and the horizontal axis is the elapsed years [years].
- the small circles indicate the estimated daily capacity maintenance rate of the storage battery. This estimated value decreases as the storage battery deteriorates.
- the dotted line indicates the route-law approximation line drawn for this estimate.
- a dashed line indicates a threshold value (capacity deterioration abnormality threshold value) for determination of capacity deterioration abnormality.
- the timing at which the estimated value of the capacity maintenance rate of the storage battery falls below the capacity deterioration abnormality threshold is defined as the life, and the intersection point (large circle) of the dotted line and the dashed line is obtained as the capacity deterioration abnormality occurrence prediction point, that is, the predicted life.
- the estimated capacity maintenance rate may be the estimated capacity maintenance rate of each battery cell or each battery module in the storage battery system, or the estimated capacity maintenance rate of some battery cells or some battery modules. .
- FIG. 5 is a diagram showing a method of predicting the life of the storage battery from the transition of the estimated resistance increase rate.
- the vertical axis is the resistance increase rate [%], and the horizontal axis is the elapsed years [years].
- the small circles indicate the estimated daily resistance increase rate of the battery. This estimated value rises as the storage battery ages.
- the dotted line indicates the route-law approximation line drawn for this estimate.
- a dashed line indicates a threshold (resistance deterioration abnormality threshold) for determination of resistance deterioration abnormality.
- the timing at which the estimated value of the resistance increase rate of the storage battery exceeds the resistance deterioration abnormality threshold is defined as the life, and the intersection point (large circle) of the dotted line and the dashed line is obtained as the resistance deterioration abnormality occurrence prediction point, that is, the predicted life.
- the estimated resistance increase rate may be the estimated resistance increase rate of each battery cell or each battery module in the storage battery system, or the estimated resistance increase rate of some battery cells or some battery modules. .
- the above life prediction method is an example, and the life prediction method is not limited to the above method.
- An advantage of analyzing on an external server is that it is possible to analyze, for example, long-term data on a yearly basis.
- the limit value determination unit 204 can determine the limit value of the storage battery 101 to be transmitted to each storage battery system 100 based on the magnitude relationship between the predicted life span and the target life span. Specifically, if the predicted lifetime exceeds the target lifetime, the restrictions are relaxed, and if the predicted lifetime is below the target lifetime, the restrictions are tightened.
- the target life means a target value, such as the replacement cycle of the storage battery 101, to bring the actual battery life closer.
- the limit value of the storage battery 101 to be transmitted to each storage battery system 100 can be appropriately changed.
- FIG. 6 is a flow chart showing processing of the external server 200 according to the embodiment.
- step 301 the data storage unit 201 collects and stores the operation history data of the storage battery 101 received from the plurality of storage battery systems 100.
- step 302 the operation history data analysis unit 202 statistically analyzes the operation history data stored in the data storage unit 201, and updates parameters necessary for predicting deterioration of the storage battery 101.
- the life prediction unit 203 estimates the life of the storage battery 101 of each storage battery system 100 using the parameters calculated by the operation history data analysis unit 202 and the operation history data received from each storage battery system 100. Predict.
- step 304 the limit value determination unit 204 determines the limit value of the storage battery 101 to be transmitted to each storage battery system 100 based on the magnitude relationship between the predicted life span and the target life span.
- the operation history data of a plurality of storage battery systems 100 is aggregated in the data storage unit 201 of the external server 200, the operation history data is statistically analyzed by the operation history data analysis unit 202, and the storage battery 101 Update the parameters necessary for deterioration prediction.
- the life prediction unit 203 predicts the life of the storage battery 101 of each storage battery system 100, and based on the magnitude relationship with the target life, the limit value determination unit 204 determines the limit value of the storage battery 101 of each storage battery system 100. to decide.
- the limit value is fed back to each storage battery system 100 via wireless communication device 104 . This makes it possible to improve the accuracy of the deterioration prediction model and appropriately change the limit value.
- the storage battery system was configured to include a wireless communication device.
- the configuration in which the storage battery system includes the wireless communication device but also the configuration in which the integrated control system or the drive device control system for controlling the entire railway vehicle includes the wireless communication device is conceivable.
- the storage battery system includes a wireless communication device it is advantageous in that it is easy to deal with the case where the manufacturer of the storage battery system and the manufacturer of the components other than the storage battery system are different.
- the integrated control system includes a wireless communication device, there is an advantage that control can be performed in consideration of information other than the storage battery system.
- the installation location of the wireless communication device is not limited to these.
- wireless communication is used because it is not possible to connect the storage battery system and an external server via wired communication.
- the radio wave conditions for wireless communication are poor, it is necessary to keep the operation history data in the storage area of the wireless communication device in the storage battery system until the radio wave conditions are restored. If the time interval for saving operation history data is shortened in order to improve the quality of the operation history data, there is a risk that the data will overflow and only fragmentary data will be obtained if the radio wave condition continues to be poor. On the other hand, if the saving time interval is lengthened, the data quality will be degraded.
- the wireless communication device 104 can save the operation history data of the storage battery 101 at multiple time intervals and transmit the saved operation history data to the external server 200 .
- FIGS. 7 and 8 are diagrams showing storage and transmission of operation history data by the wireless communication device 104 according to the embodiment. 7 and 8 show one item of operation history data, that is, any one of current, voltage, temperature, charging rate, capacity retention rate, resistance increase rate, and the like.
- the circles in the upper row indicate operation history data saved at short time intervals (t1 interval ), and the circles in the lower row indicate those at long time intervals (t2 interval). It shows the saved operation history data. That is, it shows an example of operation history data when t 1 ⁇ t 2 .
- the number of time intervals that is, the number of columns in FIGS. 7 and 8 is not particularly limited as long as it is plural.
- the circle on the left side of the column indicates the operation history data saved before the circle mark on the right side of the column, and the vertical dotted line on the right side indicates the current time.
- Circles with hatching indicate operation history data remaining in the storage area of wireless communication device 104, and circles without hatching indicate operation history data not remaining in the storage area of wireless communication device 104 due to overflow. is shown.
- An arrow superimposed on the circle indicates a history of transmitting the saved operation history data to the external server 200 .
- FIG. 7 shows an example in which the operation history data saved at short time intervals (t1 interval ) is transmitted to the external server 200 without overflowing without being transmitted because the wireless communication condition is good.
- the operation history data saved at short time intervals (t1 interval ) are transmitted, and the operation history data saved at long time intervals (t2 interval) are not transmitted.
- FIG. 8 shows an example in which operation history data stored at short time intervals (t1 interval ) overflows without being transmitted due to poor wireless communication conditions, and is not transmitted to the external server 200 .
- the operation history data saved at the short time interval (t1 interval ) does not remain, the operation history data saved at the long time interval (t2 interval) is transmitted, and the operation history data saved at the short time interval (t1 interval ) is transmitted.
- the operation history data saved at short time intervals (t1 interval ) is transmitted.
- the order in which the operation history data saved in the wireless communication device 104 is transmitted to the external server 200 by wireless communication at a plurality of time intervals is that the previously saved operation history data is first among the operation history data that has not been transmitted. For the operation history data saved at the same time, the operation history data saved at shorter time intervals is sent. As a result, even if operation history data cannot be sent to the external server 200 for a long period of time due to poor wireless communication conditions, continuous data loss is prevented for a long period of time, and the operation history is saved at as short a time interval as possible. Data can be sent to the external server 200 .
- the operation history data stored in the wireless communication device 104 may be any one or more of the instantaneous value, the average value, and the root of the mean square (Root Mean Square).
- Root Mean Square the root of the mean square
- a plurality of time intervals at which the wireless communication device 104 saves the operation history data may be set for each item of the operation history data.
- t 1 and t 2 are set small for items of operation history data with large fluctuations, such as current and voltage, and items of operation history data with moderate fluctuations, such as temperature and charging rate, are set to be small.
- t 1 and t 2 may be set to medium values, and t 1 and t 2 may be set to be large for items of operation history data with small fluctuations, such as capacity retention rate and resistance increase rate.
- the magnitude of variation for each item of operation history data is not limited to the example. As a result, each item of operation history data can be saved at a plurality of time intervals according to the magnitude of variation, the frequency of variation, and the like.
- the wireless communication device 104 may store operation history data for a predetermined period until it is transmitted. For example, operation history data such as voltage, temperature exceeding a predetermined range, rapid charging period, etc. may be stored until transmitted. As a result, important operation history data can be transmitted without fail.
- the output of the life prediction unit 203 is input to the limit value determination unit 204, but instead of or in addition to the configuration of inputting the output of the life prediction unit 203 to the limit value determination unit It is also possible to adopt a configuration in which the output of the life prediction unit 203 is input to the predicted life notification unit.
- FIG. 9 is a diagram showing a configuration for inputting the output of the life prediction unit 203 to the life expectancy notification unit 205.
- the predicted lifespan notification unit 205 notifies the lifespan predicted by the lifespan prediction unit 203 .
- notification by e-mail and display on a monitor can be considered, but it is not limited to these forms.
- FIG. 10 is a diagram showing an example of notification content by e-mail.
- Notification Report of remaining life of XXX series' batteries
- Remaining life Predicted time to reach the end of life
- Objective vehicle Vehicle
- Vehicle It consists of Decisive factor of vehicle life and Decisive point of vehicle life.
- the remaining service life is expressed in years
- the time at which service life is reached is expressed in dates
- the target vehicle is expressed in formation and number car
- the determinants of vehicle life are capacity degradation
- It is represented by over temperature, electricity shortage, and resistance degradation
- vehicle life-determining points are represented by banks, modules, and cells.
- the upper table (Alerts of remaining life) is sorted by remaining life
- the lower table List of battery remaining life of each car) is sorted by target vehicle.
- the predicted service life notification unit 205 notifies the terminals used by personnel involved in vehicle maintenance of the above contents by e-mail.
- the life expectancy notification unit 205 may be configured with a graphic user interface, and the same content may be displayed on the monitor of the terminal logged into the remote monitoring system.
- Personnel involved in vehicle maintenance change the control of the storage battery or the like based on the notification by e-mail or the display on the monitor.
- FIG. 11 is a flowchart showing processing of the external server 200 according to the modification. Steps 301 through 303 are the same as steps 301 through 303 described with reference to FIG. At step 305, the predicted service life notification unit 205 notifies the predicted service life.
- the remote monitoring system is applied to remote monitoring of a storage battery mounted on a railway vehicle.
- the field of application of the present invention is not limited to this.
- INDUSTRIAL APPLICABILITY The present invention is applicable to remote monitoring of storage batteries in general.
- each of the above configurations, functions, processing units, processing means, and the like may be realized by hardware, for example, by designing a part or all of them using an integrated circuit.
- each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function.
- Information such as programs, tables, and files that implement each function can be stored in recording devices such as memory, hard disks, SSDs (Solid State Drives), or recording media such as IC cards, SD cards, and DVDs.
- SYMBOLS 100... Storage battery system, 101... Storage battery, 102... Battery management apparatus, 103... Charge/discharge control apparatus, 104... Wireless communication apparatus, 200... External server, 201... Data storage part, 202... Operation history data analysis part, 203... Service life Prediction unit 204 Limit value determination unit 205 Predicted service life notification unit
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Abstract
Description
遠隔監視システムで得られる稼働履歴データを基に、電池セルごとの実際の負荷と劣化進行速度の相関関係を抽出するためには、長時間、途切れなく、継続的に電池状態と負荷のデータを取得・蓄積する必要がある。
上記の実施例では、寿命予測部203の出力を制限値決定部204に入力する構成であったが、寿命予測部203の出力を制限値決定部204に入力する構成に代えて、または、加えて寿命予測部203の出力を予測寿命報知部に入力する構成とすることもできる。
Claims (17)
- 複数の蓄電池システムと、
外部サーバーと、
を備える遠隔監視システムであって、
前記外部サーバーは、
複数の前記蓄電池システムから受信した蓄電池の稼働履歴データを記憶するデータストレージ部と、
前記データストレージ部に記憶された前記稼働履歴データを解析し、前記蓄電池の劣化予測に必要なパラメータを算定する稼働履歴データ解析部と、
前記稼働履歴データ解析部が算定した前記パラメータと、各々の前記蓄電池システムから受信した前記稼働履歴データとを用いて各々の前記蓄電池システムの前記蓄電池の寿命を予測する寿命予測部と、
を備える、
遠隔監視システム。 - 請求項1に記載の遠隔監視システムであって、
前記外部サーバーは、
予測寿命と目標寿命との大小関係に基づいて各々の前記蓄電池システムに送信する前記蓄電池の制限値を決定する制限値決定部と、
を備える、
遠隔監視システム。 - 請求項1または請求項2に記載の遠隔監視システムであって、
前記外部サーバーは、
予測寿命を報知する予測寿命報知部と、
を備える、
遠隔監視システム。 - 請求項1ないし請求項3のいずれか一項に記載の遠隔監視システムであって、
前記遠隔監視システムは、無線通信装置を備え、
前記無線通信装置は、前記蓄電池の前記稼働履歴データを複数の時間間隔で保存し、保存された前記稼働履歴データを前記外部サーバーへ送信する、
遠隔監視システム。 - 請求項4に記載の遠隔監視システムであって、
前記無線通信装置は、未送信の前記稼働履歴データの中で先に保存された前記稼働履歴データを先に送信し、同時期に保存された前記稼働履歴データがある場合は、より短い時間間隔で保存された前記稼働履歴データを送信する、
遠隔監視システム。 - 請求項4または請求項5に記載の遠隔監視システムであって、
前記無線通信装置に保存された前記稼働履歴データは、瞬時値、平均値、二乗平均の根(Root Mean Square)のいずれか1つ以上である、
遠隔監視システム。 - 請求項4ないし請求項6のいずれか一項に記載の遠隔監視システムであって、
複数の前記時間間隔は、前記無線通信装置が保存する前記稼働履歴データの項目ごとに設定される、
遠隔監視システム。 - 請求項4ないし請求項7のいずれか一項に記載の遠隔監視システムであって、
前記無線通信装置は、所定の期間の前記稼働履歴データを送信されるまで保存する、
遠隔監視システム。 - 請求項4ないし請求項8のいずれか一項に記載の遠隔監視システムであって、
前記蓄電池システム、統合制御システムまたは駆動装置制御システムが、前記無線通信装置を備える、
遠隔監視システム。 - 請求項1ないし請求項9のいずれか一項に記載の遠隔監視システムであって、
前記蓄電池システムは、鉄道車両に搭載されている、
遠隔監視システム。 - 無線通信装置を備える蓄電池システムであって、
前記無線通信装置は、蓄電池の稼働履歴データを複数の時間間隔で保存し、保存された前記稼働履歴データを外部サーバーへ送信する、
蓄電池システム。 - 請求項11に記載の蓄電池システムであって、
前記無線通信装置は、未送信の前記稼働履歴データの中で先に保存された前記稼働履歴データを先に送信し、同時期に保存された前記稼働履歴データがある場合は、より短い時間間隔で保存された前記稼働履歴データを送信する、
蓄電池システム。 - 請求項11または請求項12に記載の蓄電池システムであって、
前記無線通信装置に保存された前記稼働履歴データは、瞬時値、平均値、二乗平均の根(Root Mean Square)のいずれか1つ以上である、
蓄電池システム。 - 請求項11ないし請求項13のいずれか一項に記載の蓄電池システムであって、
複数の前記時間間隔は、前記無線通信装置が保存する前記稼働履歴データの項目ごとに設定される、
蓄電池システム。 - 請求項11ないし請求項14のいずれか一項に記載の蓄電池システムであって、
前記無線通信装置は、所定の期間の前記稼働履歴データを送信されるまで保存する、
蓄電池システム。 - 請求項11ないし請求項15のいずれか一項に記載の蓄電池システムであって、
前記蓄電池システムは、鉄道車両に搭載されている、
蓄電池システム。 - 複数の蓄電池システムと、
外部サーバーと、
を備える遠隔監視システムの制御方法であって、
前記外部サーバーの備えるデータストレージ部が、複数の前記蓄電池システムから受信した蓄電池の稼働履歴データを記憶し、
前記外部サーバーの備える稼働履歴データ解析部が、前記データストレージ部に記憶された前記稼働履歴データを解析し、前記蓄電池の劣化予測に必要なパラメータを算定し、
前記外部サーバーの備える寿命予測部が、前記稼働履歴データ解析部が算定した前記パラメータと、各々の前記蓄電池システムから受信した前記稼働履歴データとを用いて各々の前記蓄電池システムの前記蓄電池の寿命を予測する、
遠隔監視システムの制御方法。
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JP2015021934A (ja) * | 2013-07-23 | 2015-02-02 | 日本電気株式会社 | 劣化係数決定システム、劣化予測システム、劣化係数決定方法およびプログラム |
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EP4075564A1 (en) | 2019-12-11 | 2022-10-19 | Hitachi, Ltd. | Battery data adjustment method and battery management unit manufacturing method, and battery management unit and server |
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