JP6806192B2 - Storage battery application selection device and program - Google Patents

Description

The present invention relates to a storage battery application selection device and a program.

Conventionally, a technique has been proposed for facilitating and improving the efficiency of reuse of a deteriorated storage battery by classifying the state of the storage battery based on the operating condition of the storage battery (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-146389

However, in the conventional technology as described in Patent Document 1, since the operating condition of the storage battery is significantly different for each storage battery, it may be difficult to classify for reuse and the options for reuse may be narrowed. There was a problem.
The present invention has been made in view of the above points, and provides a storage battery application selection device and a program capable of expanding the options for reuse of the storage battery.

One aspect of the present invention includes the current use of the storage battery to be determined among a plurality of types of uses according to the usage status of the storage battery, and the determination condition indicated by the situation in which the storage battery to be determined is operated in the current use. Based on the above, the application selection unit for executing the selection process of selecting the application other than the current application among the plurality of types of applications as the new application of the storage battery to be determined is provided, and the application selection unit is the storage battery. When the rechargeable capacity is less than the permissible capacity, the selection process is executed, and the new application is selected in ascending order of the types of estimation parameters of the rechargeable capacity acquired from the storage battery operation history storage unit or the storage battery application storage unit. It is a selection device.

Further, in the storage battery application selection device of one aspect of the present invention, the application selection unit performs the selection process when the rechargeable capacity of the storage battery is less than the allowable capacity associated with the application of the storage battery to be determined. To execute.

One aspect of the present invention is a determination indicating that the current use of the storage battery to be determined among a plurality of types of uses according to the usage status of the storage battery and the situation in which the storage battery to be determined is operated in the current use. Based on the conditions, the application selection function for executing the selection process for selecting the application other than the current application among the plurality of types of applications as the new application of the storage battery to be determined is executed, and the application selection function is When the rechargeable capacity of the storage battery is less than the permissible capacity, the selection process is executed, and the new applications are selected in ascending order of the types of estimation parameters of the rechargeable capacity acquired from the storage battery operation history storage unit or the storage battery application storage unit. The program to select .

According to the present invention, the options for reusing storage batteries can be expanded.

It is a figure which shows an example of the structure of the power storage device ESD which is the judgment target of the storage battery use judgment system of this embodiment. It is a figure which shows an example of the output characteristic of the 1st power storage device of this embodiment. It is a figure which shows an example of the output characteristic of the 2nd power storage device of this embodiment. It is a figure which shows an example of the output characteristic of the 3rd power storage device of this embodiment. It is a figure which shows an example of the peak cut operation waveform by the power storage device of this embodiment. It is a figure which shows an example of the structure of the storage battery use determination system of this embodiment. It is a figure which shows an example of the storage battery operation history information stored in the storage battery operation history storage part of this embodiment. It is a figure which shows an example of the storage battery use information stored in the storage battery use storage part. It is a figure which shows an example of the operation of the storage battery use selection device of this embodiment. It is a figure which shows the example of the use selection by the use selection part of this embodiment.

[Embodiment]
Hereinafter, an embodiment of the storage battery use determination system 1 according to the present invention will be described with reference to the drawings. First, the power storage device ESD, which is the determination target of the storage battery application determination system 1, will be described with reference to FIG.
FIG. 1 is a diagram showing an example of a configuration of a power storage device ESD, which is a determination target of the storage battery application determination system 1 of the present embodiment. The power storage device ESD includes a storage battery BC and supplies power to a device to which power is supplied. Further, the power storage device ESD is stored (charged) by electric power supplied from the outside.
The power storage device ESD is charged when power is supplied from the outside, and is discharged when power is not supplied from the outside. For example, the power storage device ESD can continue to operate the device to which the power is supplied by discharging the power when the power supply from the outside is stopped due to a power failure or the like. That is, the power storage device ESD can back up the electric power against a long-term power failure, a short-term power failure, an instantaneous power failure, or the like.
Further, the power storage device ESD is charged when there is a margin in the power supply from the outside, and is discharged when there is a margin in the power supply from the outside. For example, the power storage device ESD can level the power consumption by charging the power at night when the power demand is low and discharging the power in the daytime when the power demand is high. That is, the power storage device ESD can perform so-called peak cut of electric power and so-called peak shift.

[Type of power storage device ESD]
The power storage device ESD can be applied to various uses depending on the number of storage battery BCs provided and the charging method. In this example, the power storage device ESD includes a power storage device ESD1, a power storage device ESD2, and a power storage device ESD3.

[Type of power storage device ESD: Part 1 (for long-term power failure)]
The power storage device ESD1 includes about 1000 to 10000 storage batteries BC connected in series and in parallel with each other. In the example shown in FIG. 1A, the power storage device ESD1 includes 10000 storage battery BCs from the storage battery BC1-1 to the storage battery BC1-10000. Further, in this example, the power storage device ESD1 is provided in a power plant or the like and is used for a long-term power failure response application. Here, the long-term power outage means a power outage of about several hours (for example, 10 hours).

FIG. 2 is a diagram showing an example of output characteristics of the power storage device ESD1 of the present embodiment. The power storage device ESD1 outputs the auxiliary power P1-1 for controlling the power plant and the power failure compensation power P1-2 for compensating the power to be supplied by the power plant in the event of a power failure. An example of the waveform of the auxiliary power P1-1 is shown in the power waveform W11. An example of the waveform of the power failure compensation power P1-2 is shown in the power waveform W12. In this example, the power storage device ESD1 can continue to output the auxiliary power P1-1 and the power failure compensation power P1-2 for 10 hours in case of a power failure.

Here, the case where the power storage device ESD1 is provided in the power plant will be described as an example, but the present invention is not limited to this. The power storage device ESD1 is used for applications in which a relatively large amount of electric power is continuously output for a relatively long time. The power storage device ESD1 may be installed in, for example, a factory or a large-scale commercial facility.

[Type of power storage device ESD: Part 2 (for short-term power outage)]
The power storage device ESD2 includes about 10 to 100 storage batteries BC connected in series and in parallel with each other. In the example shown in FIG. 1B, the power storage device ESD2 includes 50 storage battery BCs from the storage battery BC2-1 to the storage battery BC2-50. In this example, the power storage device ESD2 is provided in a substation or the like and is used for a short-term power failure response application. Here, the short-term power outage means a power outage of about several tens of minutes (for example, 60 minutes).

FIG. 3 is a diagram showing an example of output characteristics of the power storage device ESD2 of the present embodiment. The power storage device ESD2 outputs the auxiliary power P2-1 for controlling the substation and the power failure compensation power P2-2 for compensating the power to be supplied by the substation in the event of a power failure. Further, the power storage device ESD outputs power power P2-3 for operating equipment such as a circuit breaker and a disconnector in the substation in the event of a power failure. An example of the waveform of the auxiliary power P2-1 is shown in the power waveform W21. An example of the waveform of the power failure compensation power P2-2 is shown in the power waveform W22. An example of the waveform of the power P2-3 for power is shown in the power waveform W23. In this example, the power storage device ESD2 can continue to output the auxiliary power P2-1 and the power failure compensation power P2-2 for 60 minutes in case of a short-term power failure. Further, the power storage device ESD2 outputs the power power P2-3 as the device such as a circuit breaker or a disconnector operates.

Here, the case where the power storage device ESD2 is provided in the substation will be described as an example, but the present invention is not limited to this. The power storage device ESD2 is used for applications in which a small amount of electric power is continuously output for a relatively short time as compared with the power storage device ESD1. The power storage device ESD2 may be installed in a commercial facility such as an office building or a convenience store, for example.

[Type of power storage device ESD: Part 3 (for short-term power outages and instantaneous power outages)]
The power storage device ESD3 includes several storage batteries BC. In the example shown in FIG. 1C, the power storage device ESD3 includes one storage battery BC of the storage battery BC3-1. In this example, the power storage device ESD3 is provided on the desk of an office building or the like, and is used for an instantaneous power failure response application for backing up a personal computer. Here, a short-time power outage means a power outage of about 1 to 10 minutes. In addition, an instantaneous power outage means a power outage of several milliseconds to several seconds.

FIG. 4 is a diagram showing an example of the output characteristics of the power storage device ESD3 of the present embodiment. The power storage device ESD3 outputs the operating power P3-1 for operating the personal computer in the event of a power failure. An example of the waveform of the operating power P3-1 is shown in the power waveform W31. In this example, the power storage device ESD3 can continue to output the operating power P3-1 for 10 minutes in case of a short-time power failure or a momentary power failure.

Here, the case where the power storage device ESD3 is a power backup device for a personal computer will be described as an example, but the present invention is not limited to this.

The power storage device ESD1, the power storage device ESD2, and the power storage device ESD3 described above are charged by a so-called float charging method or a so-called trickle charging method. Therefore, the charge rate of these power storage devices ESD1 to 3 is maintained at about 100% of the rechargeable capacity when a power failure does not occur. If a power failure does not occur, the power storage devices ESD1 to 3 have almost no fluctuation in the charging rate and have a shallow charge / discharge depth.

[Type of power storage device ESD: Part 4 (for peak cut)]
The power storage device ESD can also be used for peak cut (or peak shift) applications.
FIG. 5 is a diagram showing an example of a peak cut operation waveform by the power storage device ESD of the present embodiment. When the power consumption P4-1 is lower than the threshold value ThP1, the power storage device ESD is charged by the power supplied from the outside. In the example shown in FIG. 5, the power storage device ESD is charged by the charging power P4-2 and the charging power P4-3. By this charging, the charging rate of the power storage device ESD increases. Further, when the power consumption P4-1 exceeds the threshold value ThP2, the power storage device ESD discharges to cover the power consumption P4-1. In this example, the power storage device ESD discharges the discharge power P4-4 and the discharge power P4-5. Due to this discharge, the charge rate of the power storage device ESD decreases.

The power storage device ESD described here is charged by a so-called cycle charging method. That is, the charge rate of the power storage device ESD increases or decreases as the electric power is charged and discharged. That is, the charge / discharge depth of this power storage device ESD is deeper than that of the power storage device ESD by the float charging method or the trickle charging method described above.

[Factors of change in rechargeable capacity of storage battery BC]
The rechargeable power capacity of the storage battery BC included in the power storage device ESD, that is, the rechargeable capacity varies depending on the operating condition of the storage battery BC. The range of fluctuation in the rechargeable capacity of the storage battery BC varies depending on various factors. Here, the change in the rechargeable capacity may include an increase in the rechargeable capacity and a decrease in the rechargeable capacity, that is, deterioration.

The fluctuation range of the rechargeable capacity of the storage battery BC may differ depending on the difference in the operating time during which the storage battery BC is operated. For example, a storage battery BC that has been operated for a long time has a greater degree of deterioration than a storage battery BC that has been operated for a short time.
Further, in the storage battery BC, the change range of the rechargeable capacity may differ depending on the temperature difference in the environment in which the storage battery BC is operated. For example, a storage battery BC operating in a high temperature environment has a greater degree of deterioration than a storage battery BC operating in a low temperature environment.
Further, the storage battery BC may have a different range of change in chargeable capacity due to a difference in the number of charge / discharge cycles of the storage battery BC. For example, a storage battery BC having a large number of charge / discharge cycles has a higher degree of deterioration than a storage battery BC having a small number of charge / discharge cycles.
Therefore, even if the storage batteries BC have the same initial rechargeable capacity, if the operating conditions are different from each other, the rechargeable capacity of the storage battery BC may be different after the operation of the storage battery BC.

When reusing the storage battery BC, it is required to grasp the remaining performance of the storage battery BC. The remaining performance of the storage battery BC can be obtained, for example, by estimating the rechargeable capacity of the storage battery BC. When estimating the rechargeable capacity of the storage battery BC, it is preferable to accurately grasp the operating situation of the storage battery BC.
Here, when storage batteries BC having the same initial rechargeable capacity are operated under the same operating conditions, it can be said that the rechargeable capacities of these storage battery BCs fluctuate in the same manner. As described above, the power storage device ESD includes a plurality of storage batteries BC. A plurality of storage batteries BC provided in one power storage device ESD are operated under the same operating conditions. That is, the rechargeable capacities of these plurality of storage batteries BC fluctuate in the same manner as each other.
Therefore, when the remaining performance of the power storage device ESD is grasped when the storage battery BC is reused, if the remaining performance of the power storage device ESD is grasped, the remaining performance of a large number of storage battery BCs included in the power storage device ESD can be grasped at the same time. Can be done. Further, when the remaining performance of the power storage device ESD can be grasped, the storage battery BC included in the power storage device ESD can be reused by subdividing and reusing the storage battery BC having the same remaining performance.

Next, the configuration of the storage battery use determination system 1 for selecting the use when the storage battery BC is reused based on the operation history of the storage battery BC will be described.

[Configuration of storage battery application determination system 1]
FIG. 6 is a diagram showing an example of the configuration of the storage battery use determination system 1 of the present embodiment. The storage battery use determination system 1 includes a storage battery use selection device 10, a storage battery information acquisition device 20, a storage battery operation history storage unit 30, a storage battery use storage unit 40, and a display device 50.

The storage battery information acquisition device 20 acquires information on the storage battery BC included in the power storage device ESD. Here, the information of the storage battery BC is, for example, a storage battery ID for identifying the storage battery BC. The storage battery ID may include a barcode or the like indicating the serial number of the storage battery BC. In this case, the storage battery information acquisition device 20 is provided with a bar code reader, and reads the bar code of the storage battery ID written on the exterior of the storage battery BC.
The storage battery information acquisition device 20 may include an input device such as a keyboard in place of or in addition to the barcode reader. In this case, the storage battery information acquisition device 20 may acquire the storage battery ID input to the keyboard.

The storage battery operation history storage unit 30 stores the storage battery operation history information OH indicating the operation history of the storage battery BC. An example of this storage battery operation history information OH will be described with reference to FIG.
FIG. 7 is a diagram showing an example of the storage battery operation history information OH stored in the storage battery operation history storage unit 30 of the present embodiment. The storage battery operation history storage unit 30 contains the storage battery ID, the current use of the storage battery BC, the operating time of the storage battery BC in the current use, the total operating time of the storage battery BC, the operating environment temperature of the storage battery BC, and the storage battery BC. The number of charge / discharge cycles and the amount of change in the output voltage of the storage battery BC are associated with each other and stored as the storage battery operation history information OH.

Here, the current use of the storage battery BC is the current use of the storage battery BC. The use of the storage battery BC is stored in the storage battery use storage unit 40 as the storage battery use information UA. Here, an example of the storage battery application information UA will be described with reference to FIG.

FIG. 8 is a diagram showing an example of the storage battery use information UA stored in the storage battery use storage unit 40. In this example, the storage battery BC is used for long-term power failure backup, peak cut, short-term power failure backup, and instantaneous power failure compensation. Further, in the storage battery use storage unit 40, the use of the storage battery BC, the number of series connections of the storage battery BC, the output duration of the storage battery BC, the charge / discharge depth of the storage battery BC, and the allowable capacity of the storage battery BC are associated with each other. It is stored as storage battery use information UA.

Here, the allowable capacity of the storage battery BC is the lower limit threshold value of the rechargeable capacity of the storage battery BC in the application. Specifically, in the storage battery use information UA, the allowable capacity "80%" is associated with the use "for long-term power failure backup". The permissible capacity of 80% is the lower limit of the rechargeable capacity for "for long-term power failure backup" when the rechargeable capacity of the storage battery BC in the initial shipping state is 100%. That is, the allowable capacity of 80% for long-term power failure backup means that the storage battery BC cannot be used for long-term power failure backup when the rechargeable capacity of the storage battery BC drops to 80% of the initial shipping state. Similarly, the allowable capacity for peak cut of 70% means that when the rechargeable capacity of the storage battery BC drops to 70% of the initial shipping state, the storage battery BC cannot be used for peak cut. The allowable capacity of 60% for short-term power failure backup means that when the rechargeable capacity of the storage battery BC drops to 60% of the initial shipping state, this storage battery BC cannot be used for short-term power failure backup. The allowable capacity of 50% for instantaneous power failure compensation means that when the rechargeable capacity of the storage battery BC drops to 50% of the initial shipping state, the storage battery BC cannot be used for instantaneous power failure compensation.

Returning to FIG. 6, the storage battery application selection device 10 includes a storage battery operation history acquisition unit 101, a current application extraction unit 102, an operation status extraction unit 103, an application selection unit 104, and an application information output unit 105.
The storage battery operation history acquisition unit 101 searches the storage battery operation history storage unit 30 based on the storage battery ID acquired by the storage battery information acquisition device 20. In this example, the storage battery information acquisition device 20 acquires the storage battery ID "B001". In this case, the storage battery operation history acquisition unit 101 searches for the storage battery operation history information OH using the storage battery ID "B001" as a search key, and acquires each information of the storage battery operation history information OH associated with the storage battery ID "B001". To do.

The current use extraction unit 102 extracts the current use from the storage battery operation history information OH acquired by the storage battery operation history acquisition unit 101. In this example, the current use extraction unit 102 acquires the current use “long-term power failure backup” associated with the storage battery ID “B001”.

The operation status extraction unit 103 acquires information indicating the operation status of the storage battery BC from the OH acquired by the storage battery operation history acquisition unit 101. In this example, the operation status extraction unit 103 charges and discharges the operation time "1000", the total operation time "1000", the operation environment temperature "30", and the charge / discharge in the current application associated with the storage battery ID "B001". The number of cycles "0 (float)" and the amount of change in output voltage "-10%" are extracted as information indicating the operating status.

The use selection unit 104 includes information indicating the current use of the storage battery BC extracted by the current use extraction unit 102, the operation status of the storage battery BC extracted by the operation status extraction unit 103, and the storage battery stored in the storage battery use storage unit 40. The new use of the storage battery BC is selected based on the use information UA. A specific example of the procedure for selecting a new application of the storage battery BC performed by the application selection unit 104 will be described.

In this specific example, the application selection unit 104 acquires the current application “long-term power failure backup” as the current application of the storage battery BC. The use selection unit 104 searches for the storage battery use information UA of the storage battery use storage unit 40 by using the acquired current use "long-term power failure backup" as a search key. The application selection unit 104 acquires the charge / discharge depth "10% (float)" and the allowable capacity "80%" as a result of searching the storage battery application information UA.

This charge / discharge depth "10% (float)" means that when the current application is "long-term power failure backup", the storage battery BC is charged by the float charging method, and the charge / discharge depth is at most 10%. Shown. When the storage battery BC is charged by the float charging method, the main factors of the change in the rechargeable capacity of the battery BC are the operating time and the operating environment temperature.

The application selection unit 104 acquires the operation time "1000" and the operating environment temperature "30" in the current application as information indicating the operation status. The application selection unit 104 estimates the degree of change in the rechargeable capacity of the storage battery BC based on the acquired operating time and operating environment temperature. A known method is used for estimating the degree of change in the rechargeable capacity of the storage battery BC by the application selection unit 104.

The application selection unit 104 compares the rechargeable capacity of the storage battery BC obtained as a result of the estimation with the allowable capacity "80%" indicated by the storage battery application information UA. If the estimated rechargeable capacity exceeds the permissible capacity, the application selection unit 104 determines that the application does not need to be changed. That is, in this case, the application selection unit 104 selects the current application "long-term power failure backup" as a new application.
Further, the application selection unit 104 determines that the application needs to be changed when the estimated rechargeable capacity is less than the allowable capacity. Here, the application selection unit 104 will be described by taking as an example a case where the estimated rechargeable capacity is, for example, 75% of the rechargeable capacity in the initial shipping state. In this case, the application selection unit 104 searches for applications having an allowable capacity of 75% or less in the storage battery application information UA. In this case, in the example shown in FIG. 8, the application selection unit 104 acquires the application “peak cut”, the application “short-term power failure backup”, and the application “instantaneous power failure compensation” as search results. The use selection unit 104 selects the use acquired as a search result as a new use. Here, the application selection unit 104 selects an application having a high allowable capacity as a new application from the applications obtained as a result of the search. Specifically, the application selection unit 104 selects the application "short-term power failure backup" as a new application.

The application information output unit 105 outputs information indicating a new application selected by the application selection unit 104 to the display device 50. The display device 50 displays information indicating a new application output by the application information output unit 105. Further, the application information output unit 105 updates the storage battery operation history information OH of the storage battery operation history storage unit 30 based on the information indicating the new application selected by the application selection unit 104. Specifically, the usage information output unit 105 updates the current usage "long-term power failure backup" to the current usage "short-term power failure backup" for the storage battery ID "B001" of the storage battery operation history information OH.

[Operation of storage battery application selection device 10]
Next, an example of the operation of the storage battery application selection device 10 will be described with reference to FIG.
FIG. 9 is a diagram showing an example of the operation of the storage battery application selection device 10 of the present embodiment.

(Step S10) The storage battery operation history acquisition unit 101 acquires storage battery information from the storage battery information acquisition device 20. Specifically, the storage battery operation history acquisition unit 101 acquires the storage battery ID. (Step S20) The storage battery operation history acquisition unit 101 searches the storage battery operation history storage unit 30 based on the storage battery ID acquired in step S10, and acquires the storage battery operation history information OH.
(Step S30) The current use extraction unit 102 acquires information indicating the current use of the storage battery BC from the storage battery operation history information OH acquired in step S20 (current use acquisition step). (Step S40) The operation status extraction unit 103 acquires information indicating the operation status of the storage battery BC from the storage battery operation history information OH acquired in step S20. Here, the information indicating the operating status of the storage battery BC is used in the application selection unit 104 as a determination condition for a new application. That is, the operation status extraction unit 103 acquires information indicating the operation status of the storage battery BC as a determination condition (determination condition acquisition step).

(Step S50) The application selection unit 104 selects a new application of the storage battery BC based on the storage battery application information UA of the storage battery application storage unit 40 and the determination conditions acquired in step S40 (application selection step).
(Step S60) The application information output unit 105 outputs information indicating a new application of the storage battery BC selected in step S50 to the display device 50 and the storage battery operation history storage unit 30.

[Details of new application selection by application selection unit 104]
Next, the details of the application selection of the storage battery BC by the application selection unit 104 will be described with reference to FIG.
FIG. 10 is a diagram showing an example of application selection by the application selection unit 104 of the present embodiment. The figure shows the rechargeable capacity waveform W4 showing the relationship between the rechargeable capacity of the storage battery BC and the operating time. The rechargeable capacity of the storage battery BC may increase as the operating time elapses from the initial shipping state at time t0. The rechargeable capacity of the storage battery BC drops to 80% of the initial shipping state at time t1. As explained with reference to FIG. 8, the allowable capacity of the “long-term power failure backup” is 80%. That is, the storage battery BC can be used for "long-term power failure backup" between the time t0 and the time t1 shown in FIG.

At time t1, the application selection unit 104 determines that the storage battery BC cannot be used for "long-term power failure backup". In this case, the application selection unit 104 sets the storage battery BC to one of "peak cut", "short-term power failure backup", or "instantaneous power failure compensation" in which the allowable capacity is set to a value lower than that of "long-term power failure backup". Judged to be reused for the purpose of.

Here, the "long-term power failure backup" requires a longer output duration than the "peak cut", "short-term power failure backup", or "instantaneous power failure compensation". When the current application is an application having a long required output duration, the application selection unit 104 selects an application having a short output duration as a new application. That is, the application selection unit 104 selects new applications in order from the one with the longest output duration to the one with the shortest output duration. Here, in the application having a short output duration, the required residual performance of the storage battery BC is relatively low as compared with the application having a long output duration. With this configuration, the storage battery application selection device 10 can expand the range of options for reuse of the storage battery BC even if the remaining performance of the storage battery BC gradually deteriorates.

Further, the power storage device ESD used for "long-term power failure backup" has a larger number of storage battery BCs connected in series than the power storage device ESD used for "peak cut", "short-term power failure backup" or "instantaneous power failure compensation". When the current application uses the power storage device ESD with a large number of series connections of the storage battery BC, the application selection unit 104 selects the application using the power storage device ESD with a small number of series connections as a new application. That is, the application selection unit 104 selects a new application in order from the one with the largest number of connected storage batteries BC in series. Here, when a power storage device ESD having a large number of storage battery BCs connected in series is used, it is possible to prepare a large number of storage battery BCs having the same remaining performance. That is, the storage battery application selection device 10 can prepare a storage battery BC having the same remaining performance as a BC for reuse. Therefore, according to the storage battery application selection device 10, the range of options for reuse of the storage battery BC can be expanded.

Further, here, the application selection unit 104 selects either "peak cut" or "short-term power failure backup" as a new application for the storage battery BC.
As described above, when the storage battery BC is used for "peak cut", the storage battery BC is charged by the cycle charging method. When the storage battery BC is used for "short-term power failure backup", the storage battery BC is charged by the float charging method. Here, the rechargeable capacity of the storage battery BC charged by the cycle charging method changes depending on the number of charge / discharge cycles and the charge / discharge depth in addition to the operating time and the environmental temperature. That is, it is more difficult to estimate the rechargeable capacity of the storage battery BC charged by the cycle charging method than that of the storage battery BC charged by the float charging method. When it is difficult to estimate the rechargeable capacity, it may be required to allow a sufficient margin for the rechargeable capacity. In this case, even if the storage battery BC is originally reusable, the frequency of determination that it cannot be reused increases because there is no margin in the rechargeable capacity.

Therefore, when there are a plurality of options for the new use of the storage battery BC, the use selection unit 104 selects the use having a relatively large charge / discharge depth as compared with the current use as the new use. That is, the application selection unit 104 selects new applications in order from applications having a relatively small charge / discharge depth to applications having a relatively large charge / discharge depth.
In other words, when there are a plurality of options for the new use of the storage battery BC, the use selection unit 104 selects the use for which the chargeable capacity can be easily estimated as the new use. Specifically, when either "peak cut" or "short-term power failure backup" can be selected, the application selection unit 104 newly provides "short-term power failure backup" with a smaller estimated parameter of chargeable capacity. Select as an application.

At time t2, the application selection unit 104 determines that the rechargeable capacity of the storage battery BC can be selected from either "peak cut" or "short-term power failure backup". Here, the application selection unit 104 may select the current application "short-term power failure backup" as it is as a new application, or may select "peak cut" as a new application. Here, the application selection unit 104 can more easily estimate the chargeable capacity at time t2 by selecting "short-term power failure backup" having a smaller chargeable capacity estimation parameter at time t1. Become. That is, the application selection unit 104 selects new applications in ascending order of estimation parameters of chargeable capacity. With such a configuration, the storage battery application selection device 10 can expand the range of options for reuse of the storage battery BC.

At time t3, the application selection unit 104 determines that the storage battery BC cannot be used for either "peak cut" or "short-term power failure backup". In this case, the application selection unit 104 selects the application "instantaneous power failure compensation" having the smallest allowable capacity as a new application of the storage battery BC. That is, the application selection unit 104 selects new applications in descending order of allowable capacity with respect to the rechargeable capacity. With such a configuration, the storage battery application selection device 10 can expand the range of options for reuse of the storage battery BC.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment and may be appropriately modified without departing from the spirit of the present invention. it can.

Each of the above-mentioned devices has a computer inside. The process of each process of each device described above is stored in a computer-readable recording medium in the form of a program, and the process is performed by the computer reading and executing this program. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, this computer program may be distributed to a computer via a communication line, and the computer receiving the distribution may execute the program.

Further, the above program may be for realizing a part of the above-mentioned functions. Further, a so-called difference file (difference program) may be used, which can realize the above-mentioned functions in combination with a program already recorded in the computer system.

1 ... Storage battery application determination system, 10 ... Storage battery application selection device, 20 ... Storage battery information acquisition device, 30 ... Storage battery operation history storage unit, 40 ... Storage battery application storage unit, 50 ... Display device, 101 ... Storage battery operation history acquisition unit, 102 … Current application extraction unit, 103… Operating status extraction unit, 104… Application selection unit, 105… Application information output unit

Claims (3)

Among the plurality of types of uses according to the usage status of the storage battery, the plurality of types are based on the current use of the storage battery to be determined and the determination condition indicated by the situation in which the storage battery to be determined is operated in the current use. It is provided with an application selection unit that executes a selection process for selecting an application other than the current application among the applications as a new application of the storage battery to be determined.
The application selection unit
When the rechargeable capacity of the storage battery is less than the permissible capacity, the selection process is executed, and the new application is selected in ascending order of the types of estimation parameters of the rechargeable capacity acquired from the storage battery operation history storage unit or the storage battery application storage unit. battery purpose selecting device that. The application selection unit executes the selection process when the rechargeable capacity of the storage battery is less than the allowable capacity associated with the application of the storage battery to be determined.
The storage battery application selection device according to claim 1. On the computer
Among the plurality of types of uses according to the usage status of the storage battery, the plurality of types are based on the current use of the storage battery to be determined and the determination condition indicated by the situation in which the storage battery to be determined is operated in the current use. An application selection function for executing a selection process for selecting an application other than the current application among the applications as a new application of the storage battery to be determined is executed.
The application selection function is
When the rechargeable capacity of the storage battery is less than the permissible capacity, the selection process is executed, and the new application is selected in ascending order of the types of estimation parameters of the rechargeable capacity acquired from the storage battery operation history storage unit or the storage battery application storage unit. program to be.

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