JP2018164383A - Power storage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a high capacity power storage system even when a space for installing a storage battery is restricted.SOLUTION: A power storage system has: a plurality of storage batteries; and a control part which controls the plurality of storage batteries. The control part performs different charge/discharge control to the plurality of storage batteries depending on whether the respective storage batteries are inside or outside of a range of predetermined operating conditions. The control part performs control to prohibit charge/discharge to the storage batteries outside the range of the predetermined operating conditions, and to permit the charge/discharge to other storage batteries inside the range of the predetermined operating conditions.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a power storage system.

  In recent years, the introduction of a stationary electric storage system for home use has progressed, but depending on housing circumstances, it may not be possible to secure a space where a large-capacity storage battery can be installed.

JP 2012-225570 A

  An object of the embodiment is to enable a large-capacity power storage system to be installed even when a space for installing a storage battery is limited.

  The power storage system according to the embodiment includes a plurality of storage batteries and a control unit that controls the plurality of storage batteries. A control part performs different charging / discharging control with respect to a some storage battery by the inside of the range of a predetermined | prescribed operating condition.

  According to the embodiment, a large-capacity power storage system can be installed even when the space for installing the storage battery is limited.

FIG. 1 is a diagram illustrating a configuration example of a system including the power storage system according to the first embodiment. FIG. 2 is a flowchart for explaining control processing by storage battery PCS in FIG. FIG. 3 is a flowchart for explaining details of the charge / discharge control processing in FIG. 2. FIG. 4 is a diagram for explaining an output control method of the storage battery. FIG. 5 is a diagram illustrating a configuration example of a system including the power storage system according to the second embodiment. FIG. 6 is a flowchart for illustrating a control process by storage battery PCS in FIG. FIG. 7 is a flowchart for explaining details of the charge / discharge control processing in FIG. 6.

  The power storage system (1) according to the embodiment described below includes a plurality of storage batteries (13, 14) and a control unit (11) that controls the plurality of storage batteries. A control part performs different charging / discharging control with respect to a some storage battery (S5) according to the inside of the range of a predetermined | prescribed operating condition (S2).

  Moreover, in the electrical storage system which concerns on embodiment described below, a control part shall be in the state which prohibits charging / discharging with respect to the storage battery which became out of the range of predetermined | prescribed operating conditions among several storage batteries (S4), It is set as the state which permits charging / discharging with respect to another storage battery (S3).

  Moreover, in the electrical storage system which concerns on embodiment described below, a control part complements the output power of the storage battery made into the state which prohibits charging / discharging with the storage battery made into the state which permits charging / discharging. Control (S54).

  In the power storage system according to the embodiment described below, the storage battery that can be out of the range of the predetermined operating condition can be determined in advance depending on the installation location of the storage battery. Therefore, when charging the plurality of storage batteries, the control unit preferentially charges the storage batteries (13) other than the storage battery (14) that may be out of the range of the predetermined operating conditions (S57).

  In addition, the power storage system according to the embodiment described below accumulates information indicating in what time and under what operating conditions the storage battery (14) that is in a state in which charging / discharging is prohibited is stored in time series. Based on the storage means (S6, 50) to be stored and the information accumulated in time series, whether the storage battery is currently in a state of permitting charge / discharge, but is in a state of prohibiting charge / discharge within a predetermined time from the present And a predicting means (50) for predicting whether or not the future state is present. And a control part controls charge of the some storage battery in at least one part time from the present to predetermined time based on prediction (S57, S60).

  Moreover, in the electrical storage system which concerns on embodiment described below, it further has a server (50) connected to a control part via a network (40). The storage means and the prediction means are provided in this server.

Hereinafter, embodiments will be described in detail with reference to the drawings.
[First Embodiment]
FIG. 1 is a diagram illustrating a configuration example of a system including the power storage system according to the first embodiment.
In the configuration example shown in FIG. 1, the power storage system 1 is a system having a storage battery power conditioner (storage battery PCS) 11, a display controller 12, an indoor storage battery 13, an outdoor storage battery 14, and a storage system distribution board 15.

  In the power storage system 1, a display controller 12, an indoor storage battery 13, and an outdoor storage battery 14 are connected to the storage battery PCS 11. Further, the storage battery PCS11 is connected to the selected load 21 via the electricity storage system distribution board 15. The electricity storage system distribution board 15 is connected to a system (commercial power supply, system power supply) 30 and a general load 23 via a residential distribution board 22. The selected load 21 is a load to which electric power is supplied from the power storage system 1 at the time of a power failure of the system 30, and the general load 23 is another load. Further, when the solar cell module 24 is installed, the solar cell module 24 can be connected to the residential distribution board 22 via the solar light PCS 25.

  The storage battery PCS11 is a control unit that controls power in the power storage system 1. For example, the storage battery PCS11 controls charging / discharging of the indoor storage battery 13 and the outdoor storage battery 14 in accordance with various operation modes or operation instructions. Further, the storage battery PCS11 has a conversion circuit that converts DC power into AC power, converts DC power discharged from the indoor storage battery 13 and the outdoor storage battery 14 into AC power, and converts the converted AC power into power distribution system power distribution. The power is supplied to the selected load 21 via the panel 15 and to the general load 23 or the system 30 via the power distribution system distribution board 15 and the residential distribution board 22. In addition, the storage battery PCS 11 controls the storage by supplying power from the grid 30 or the solar battery module 24 supplied via the storage system distribution board 15 to the indoor storage battery 13 and the outdoor storage battery 14.

  The display controller 12 displays the operation status in the power storage system 1 on a display device. The display controller 12 acquires information such as a power value in each unit from the storage battery PCS11, and controls display contents to be displayed on the display device based on the acquired information. The display controller 12 only needs to be able to control information to be displayed on the display device. For example, the display controller 12 may be an information terminal having a display device such as a display panel and an operation device such as a touch panel, or may display information on a display unit of an information terminal capable of communication connection. good.

  The solar cell module 24 is a power generation device that generates electricity. The solar cell module 24 is a solar power generation system that converts sunlight condensed by a solar panel or the like into electric power. The solar cell module 24 supplies power generated from sunlight to the solar PCS 25. The solar PCS 25 has a conversion circuit that converts DC power into AC power, converts DC power supplied from the solar cell module 24 into AC power, and converts the converted AC power via the residential distribution board 22. Supply to general load 23 or system 30. The solar PCS 25 supplies power from the solar battery module 24 to the storage battery PCS11 via the residential distribution board 22 and the storage system distribution board 15 to store power in the indoor storage battery 13 and the outdoor storage battery 14. It can also be used.

  The indoor storage battery 13 and the outdoor storage battery 14 are power storage devices that store (accumulate) electric power. In the configuration example shown in FIG. 1, charging and discharging of the indoor storage battery 13 and the outdoor storage battery 14 are controlled by the storage battery PCS 11, respectively. For example, each of the indoor storage battery 13 and the outdoor storage battery 14 supplies power stored in accordance with a discharge instruction to the storage battery PCS11. Moreover, the indoor storage battery 13 and the outdoor storage battery 14 are each charged with the electric power supplied via the storage battery PCS11.

  Generally, as a storage space for a storage battery in a house, it is easier to secure an outdoor space than an indoor space. Therefore, the outdoor storage battery 14 can be installed with a larger capacity than the indoor storage battery 13. Each of the indoor storage battery 13 and the outdoor storage battery 14 accommodates a large number of cells, and a temperature sensor for measuring the temperature is arranged for each cell. Each of the indoor storage battery 13 and the outdoor storage battery 14 includes a battery management unit that counts the measurement results of the temperature sensors, and the count results are transmitted to the storage battery PCS11.

  Since the outdoor storage battery 14 is installed outdoors, it is greatly affected by environmental changes. For example, if it is installed on the south side of a house with good sunlight, the temperature of the cell housed inside the outdoor storage battery 14 becomes very high during a fine summer day. In addition, if it is installed on the north side of a house that is exposed to cold winds such as the north wind without being exposed to the sun, the temperature of the cell becomes very low in the early winter in the severe winter season or during snowfall. It is known that when a cell is outside a predetermined temperature, the deterioration proceeds. As described above, the outdoor storage battery 14 has a possibility that the storage battery may be deteriorated when the cell temperature fluctuates greatly depending on the environmental conditions and the charge / discharge operation is performed outside the operating temperature range.

  Therefore, in the present embodiment, the storage battery PCS11 discriminates the inside / outside of a predetermined operating condition range, for example, the inside / outside temperature range of −30 ° C. to + 50 ° C., from the temperature measurement results sent from the indoor storage battery 13 and the outdoor storage battery 14. Thus, different charge / discharge control is performed for each of the indoor storage battery 13 and the outdoor storage battery 14.

Next, different control processes for a plurality of storage batteries depending on the range of the predetermined operating condition will be described.
FIG. 2 is a flowchart for explaining a control process by the storage battery PCS11. Note that FIG. 2 shows only the control processing characteristic of the present embodiment, and the control processing not directly related to the present embodiment is the same as the existing control processing, and thus illustration and description thereof are omitted. Shall.

  When the operation is started, the storage battery PCS11 acquires temperature information from all of the plurality of storage batteries, that is, the indoor storage battery 13 and the outdoor storage battery 14 (S1).

  Then, the storage battery PCS11 determines whether there is a storage battery that falls outside a predetermined operating condition range, for example, a temperature range of −30 ° C. to + 50 ° C. Here, the installation location of each storage battery is known. Therefore, the storage battery PCS11 has, as prior information, that the storage battery that can be out of the range of predetermined operating conditions is the outdoor storage battery 14. Hereinafter, the description will be made on the premise of having this prior information. Therefore, it is determined here whether or not the outdoor storage battery 14 is out of operating conditions (S2).

  When it is determined that the outdoor storage battery 14 is not outside the operating condition range, that is, within the operating condition (“NO” in S2), the storage battery PCS11 sets a charge / discharge permission state for all the storage batteries (S3). On the other hand, when it is determined that the outdoor storage battery 14 is out of the operating condition range (“YES” in S2), the storage battery PCS11 sets the charge / discharge control state for the outdoor storage battery 14 to the charge / discharge prohibited state. (S4). In this case, the charge / discharge control state for the indoor storage battery 13 maintains the setting.

  When the charge / discharge control state is thus set, the storage battery PCS11 executes charge / discharge control (S5).

FIG. 3 is a flowchart for explaining the details of the charge / discharge control process.
First, the storage battery PCS11 determines whether or not to perform discharge control of the storage battery (S51). This determination is performed, for example, by determining whether or not it is a set time for performing discharge set in advance by the display controller 12.

  When it is determined that the discharge control is to be performed (“YES” in S51), the storage battery PCS11 determines whether or not the charge / discharge control state of the outdoor storage battery 14 is set to the charge / discharge prohibited state ( S52). If it is determined that the charge / discharge control state of the outdoor storage battery 14 is not set to the charge / discharge prohibited state ("NO" in S52), the storage battery PCS11 removes all the storage batteries, that is, the indoor storage battery 13 and the outdoor storage battery 14. Then, control is performed to discharge the normal output (S53). Thereafter, the storage battery PCS11 returns the control process to the process of S1.

FIG. 4 is a diagram for explaining an output control method of the storage battery.
The indoor storage battery 13 and the outdoor storage battery 14 each have a rated output, and when both discharge to the rated output, an output as shown in FIG. 4 as the maximum output can be obtained. In the present embodiment, in the normal output discharge control of S53, as shown as 1 in normal use in FIG. 4, control is performed so that 50% of the rated output is the maximum discharge output. Alternatively, as shown in FIG. 4 as normal use 2, about 10% of the rated output is set as the maximum discharge output for the indoor storage battery 13, and the total maximum discharge output of the indoor storage battery 13 and the outdoor storage battery 14 for the outdoor storage battery 14. Is controlled so as to be the same as 1 during normal use. Alternatively, the indoor storage battery 13 may be controlled not to discharge.

  On the other hand, when it is determined in S52 that the charge / discharge control state of the outdoor storage battery 14 is set to the charge / discharge prohibited state ("YES" in S52), the storage battery PCS11 displays the outdoor storage battery in FIG. As shown as the prohibition time, the indoor storage battery 13 is controlled so as to be discharged to its rated output (S54). That is, when the charge / discharge control state of the outdoor storage battery 14 is set to the charge / discharge prohibited state, the outdoor storage battery 14 cannot be discharged, so that the discharge by the outdoor storage battery 14 is complemented. The discharge of the indoor storage battery 13 is controlled. Thereafter, the storage battery PCS11 returns the control process to the process of S1.

  Further, when it is determined in S51 that the storage battery discharge control is not performed ("NO" in S51), the storage battery PCS11 determines whether or not the storage battery charging control is performed (S55). This determination is made by, for example, determining whether it is time to charge with midnight power with a low electricity bill set in advance by the display controller 12 or whether there is power from the solar cell module 24. It is done by doing.

  If it is determined that the charging control is to be performed (“YES” in S55), the storage battery PCS11 first determines whether or not the indoor storage battery 13 is fully charged (S56). If it is determined that the indoor storage battery 13 is not fully charged (“NO” in S56), the storage battery PCS11 controls the indoor storage battery 13 to be charged (S57). That is, as described above, it is known from the prior information that the outdoor storage battery 14 may be set to the charge / discharge control state prohibited. Therefore, when the outdoor storage battery 14 is set to the charge / discharge prohibited state, The indoor storage battery 13 is preferentially charged so that the storage battery 13 is sufficiently charged. Thereafter, the storage battery PCS11 returns the control process to the process of S1.

  On the other hand, when it is determined in S56 that the indoor storage battery 13 is in a fully charged state (“YES” in S56), the storage battery PCS11 has the charge / discharge control state of the outdoor storage battery 14 set to the charge / discharge prohibited state. It is determined whether it is set (S58). Here, when it is determined that the charge / discharge control state of the outdoor storage battery 14 is set to the charge / discharge prohibited state (“YES” in S58), the storage battery PCS11 returns the control process to the process of S1.

  When it is determined in S58 that the charge / discharge control state of the outdoor storage battery 14 is not set to the charge / discharge prohibited state ("NO" in S58), the storage battery PCS11 further charges the indoor storage battery 13 to full charge. It is determined whether it is in a state (S59). When it is determined that the outdoor storage battery 14 is fully charged (“YES” in S59), the storage battery PCS11 returns the control process to the process of S1.

  In contrast, when it is determined that the outdoor storage battery 14 is not fully charged (“NO” in S96), the storage battery PCS11 controls the outdoor storage battery 14 to be charged (S60). Thereafter, the storage battery PCS11 returns the control process to the process of S1.

  According to the power storage system according to the first embodiment as described above, a large-capacity power storage system can be installed by dispersing and installing storage batteries as the indoor storage battery 13 and the outdoor storage battery 14 in a limited space of a house. .

  Although the above description has been made on the premise that the storage battery that can be out of the range of the predetermined operating condition is the outdoor storage battery 14, it is needless to say that the prior information is not necessary. In that case, the inside / outside of the operating condition range of each storage battery may be determined, and the storage battery outside the operating condition range may be placed in a charge / discharge prohibited state.

  In that case, instead of installing one storage battery indoors and one outdoors, for example, one storage battery is placed on each of the south and north sides of the house, or a total of three or more storage batteries are installed. You may do it.

  Moreover, according to the electrical storage system which concerns on 1st Embodiment as mentioned above, when the operating condition of any storage battery, for example, the outdoor storage battery 14, becomes out of a predetermined operating range, In addition to prohibiting charging / discharging of the storage battery, the storage battery permitted to charge / discharge other than that, for example, the indoor storage battery 13, performs supplementary operation for charging / discharging the storage battery prohibited from charging / discharging. The battery can be prevented from deteriorating when used in an environment outside the operating range.

  In addition, according to the power storage system as described above, when there is a storage battery such as the outdoor storage battery 14 that can be predicted to be prohibited from charging / discharging depending on conditions such as the installation location, the charging / discharging is prohibited. By preferentially charging a storage battery other than a storage battery, for example, the indoor storage battery 13, when a storage battery for which charging / discharging is prohibited occurs, a sufficient amount of charge for the other storage battery is secured. I can leave.

[Second Embodiment]
FIG. 5 is a diagram illustrating a configuration example of a system including the power storage system according to the second embodiment. Here, about the structure similar to 1st Embodiment shown in FIG. 1, the description is abbreviate | omitted by attaching | subjecting the same referential mark as 1st Embodiment.

  The power storage system 1 according to the present embodiment includes a home gateway (HG) 16 for communicating with the server 50 via a network 40 such as the Internet in addition to the configuration of the first embodiment. The HG 16 is wirelessly connected to the display controller 12. Of course, the HG 16 and the display controller 12 may be connected by wire.

  In the present embodiment, the storage battery PCS11, when a storage battery that is out of the range of the predetermined operating condition occurs, information such as the generated storage battery, the out-of-range operation condition, the generation time, from the display controller 12 via the HG16. It has a function of transmitting to a server 50 connected to the network 40.

  The server 50 accumulates information transmitted from the storage battery PCS11 in time series. Further, the server 50 acquires weather and temperature forecast information from an external information source via the network 40, and from this forecast information and the information accumulated in time series, the server 50 is likely to be out of the range of predetermined operating conditions. A function of predicting the storage battery and its occurrence time is provided. Then, the server 50 transmits the prediction result as prediction information to the HG 16 connected to the network 40.

  In the present embodiment, the storage battery PCS 11 receives the prediction information received by the HG 16 via the display controller 12 and performs charging control for the indoor storage battery 13 and the outdoor storage battery 14 based on the prediction information.

Hereinafter, the control process of the storage battery PCS11 in the present embodiment will be described.
FIG. 6 is a flowchart for explaining a control process by the storage battery PCS11. In addition, about the control processing similar to 1st Embodiment shown in FIG. 2, the description is abbreviate | omitted by attaching | subjecting the same referential mark as 1st Embodiment.

  That is, in this embodiment, if the storage battery PCS11 sets the charge / discharge control state of the outdoor storage battery 14 to the charge / discharge prohibited state in S4, the charge / discharge prohibited state setting of the outdoor storage battery 14 occurs, Information such as out-of-range operating conditions and occurrence time is reported from the display controller 12 to the server 50 connected to the network 40 via the HG 16 (S6).

  FIG. 7 is a flowchart for explaining details of the charge / discharge control processing in the present embodiment. In this case as well, the same control processes as those in the first embodiment shown in FIG. 3 are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

  The storage battery PCS11 first determines whether or not it is time to receive prediction information from the server 50 (S71). This determination is performed, for example, by determining whether or not an arbitrary time at night before starting charging with nighttime power has come.

  If it is determined that it is time to receive the prediction information from the server 50 (“YES” in S71), the storage battery PCS11 receives the prediction information from the server 50 by the HG16 (S72).

  If the prediction information is received in S72 in this way, or if it is determined that it is not the timing to receive the prediction information from the server 50 in S71 ("NO" in S71), the storage battery PCS11 discharges the storage battery in S51. Proceed to determine whether to perform control. Since the control process when it is determined in S51 that the storage battery discharge control is performed is the same as that in the first embodiment, the description thereof is omitted here.

  On the other hand, when it is determined in S51 that the storage battery discharge control is not to be performed ("NO" in S51), the storage battery PCS11, in this embodiment, first, the charge / discharge control state of the outdoor storage battery 14 is charge / discharge. It is determined whether or not the prohibition state is set (S58). And when it determines with the charging / discharging control state of the outdoor storage battery 14 being set to the charging / discharging prohibition state ("YES" of S58), the storage battery PCS11 advances control processing to said S56, indoor storage battery The charging control according to the 13 charging states is performed.

  On the other hand, when it is determined in S58 that the charge / discharge control state of the outdoor storage battery 14 is not set to the charge / discharge prohibited state ("NO" in S58), the storage battery PCS11 received in S72. It is determined from the prediction information whether or not the outdoor storage battery 14 is predicted to have a high possibility that the charge / discharge control state is set to the charge / discharge prohibited state (S73). If it is determined that the outdoor storage battery 14 is predicted to have a high possibility of being in a charge / discharge prohibited state (“YES” in S73), the storage battery PCS11 determines whether the indoor storage battery 13 is fully charged. It is determined whether or not (S74). Here, when it is determined that the indoor storage battery 13 is not fully charged (“NO” in S74), the storage battery PCS11 moves the control process to S57 so as to charge the indoor storage battery 13. Control. That is, when the outdoor storage battery 14 is in a charge / discharge prohibited state, the indoor storage battery 13 is preferentially charged so that the charge amount of the indoor storage battery 13 is sufficiently secured.

  If it is determined in S74 that the indoor storage battery 13 is fully charged (“YES” in S74), the storage battery PCS11 advances the control process to S59, and responds to the charge state of the outdoor storage battery 14. Charge control will be performed.

  On the other hand, when it is determined in S73 that it is not predicted that the outdoor storage battery 14 is likely to be in a charge / discharge prohibited state ("NO" in S73), the storage battery PCS11 is connected to the indoor storage battery 13 or the outdoor storage battery 14. It is determined whether any of them is fully charged (S75). Here, when it is determined that either the indoor storage battery 13 or the outdoor storage battery 14 is in a fully charged state (“YES” in S75), the storage battery PCS11 is the indoor storage battery 13 in the fully charged state. It is determined whether or not (S76). If it is determined that the indoor storage battery 13 is fully charged (“YES” in S76), the storage battery PCS11 advances the control process to S60 and controls the outdoor storage battery 14 to be charged. Will do. Further, when it is determined that the indoor storage battery 13 is not fully charged, that is, the outdoor storage battery 14 is fully charged (“NO” in S76), the storage battery PCS11 advances the control process to S57. Then, the indoor storage battery 13 is controlled to be charged.

  On the other hand, when it is determined in S75 that either the indoor storage battery 13 or the outdoor storage battery 14 is not fully charged, that is, neither is fully charged yet ("NO" in S75), The storage battery PCS11 controls to charge both the indoor storage battery 13 and the outdoor storage battery 14 (S77). Thereafter, the storage battery PCS11 returns the control process to the process of S1.

  According to the power storage system according to the second embodiment as described above, the same effects as those of the power storage system according to the first embodiment described above can be achieved.

  Further, according to the power storage system according to the second embodiment as described above, information on storage batteries whose charging / discharging is prohibited is stored in the server 50 in time series, and based on this information, a certain storage battery is stored. Is currently in a state where charging / discharging is permitted, but if it is predicted that charging / discharging will be prohibited within a predetermined time from the present time, for example, the morning and evening of the following day or the day of the following day, at least the Sufficiently charge the storage battery other than the storage battery that is expected to be in a state where discharge is prohibited, so that when a storage battery for which charging / discharging is prohibited occurs, the charge amount of the other storage battery is sufficient. It can be secured.

  In addition, without using the server 50, a memory is provided in the storage battery PCS11 or the display controller 12 for storing information on storage batteries whose charging / discharging is prohibited in time series, and external information is transmitted via the network 40 via the HG16. The forecast information may be acquired from the source, and the storage battery PCS11 may predict a storage battery that is likely to be out of the range of predetermined operating conditions.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

    DESCRIPTION OF SYMBOLS 1 ... Power storage system, 11 ... Storage battery power conditioner (storage battery PCS), 12 ... Display controller, 13 ... Indoor storage battery, 14 ... Outdoor storage battery, 15 ... Power distribution system distribution board, 16 ... Home gateway (HG), 21 ... Selection load, 22 ... Residential distribution board, 23 ... General load, 24 ... Solar cell module, 25 ... Solar power PCS, 30 ... System, 40 ... Network, 50 ... Server.

Claims (6)

A plurality of storage batteries;
A control unit that performs different charge / discharge control on the plurality of storage batteries depending on the range of predetermined operating conditions; and
A power storage system. The control unit is in a state in which charging / discharging is prohibited for the storage battery out of the range of the predetermined operating condition among the plurality of storage batteries, and charging / discharging is allowed in another storage battery,
The power storage system according to claim 1. The control unit controls the output power of the storage battery that is in a state of prohibiting the charge / discharge to be supplemented by the storage battery that is in a state of permitting charge / discharge.
The power storage system according to claim 2. The storage battery that can be out of the range of the predetermined operating condition can be determined in advance by the installation location of the storage battery,
The control unit preferentially charges a storage battery other than the storage battery that can be out of a range of the predetermined operating condition when charging the plurality of storage batteries.
The power storage system according to claim 2 or 3. Storage means for accumulating information indicating in what time and under what operating conditions the storage battery in a state prohibiting charging and discharging is stored in time series,
Prediction for predicting the future state based on the information accumulated in time series, whether or not the storage battery is currently in a state that permits charging / discharging but prohibits charging / discharging within a predetermined time from now Means,
Further comprising
The control unit controls charging of the plurality of storage batteries in at least a part of time between the present and a predetermined time based on the prediction.
The power storage system according to any one of claims 2 to 4. A server connected to the control unit via a network;
The storage means and the prediction means are provided in the server.
The power storage system according to claim 5.