WO2019039114A1 - Electricity storage control device, electricity storage control method, and electricity storage system - Google Patents

Abstract

[Problem] To provide an electricity storage control device capable of obtaining more opportunities for charging and discharging and thereby capable of improving the system usage efficiency. [Solution] Provided is a control device provided with: a specifying unit for specifying a current threshold value for the current flowing from a charging device to a storage battery or the current flowing from the storage battery to a feeding device and specifying an allowable duration time for the current threshold value, said allowable duration time allowing a current having an amount exceeding the current threshold value to flow to or from the storage battery; a determining unit for determining whether or not the current having the amount exceeding the current threshold value flows to or from the storage battery; and a setting unit for, according to the determination of whether or not the current having the amount exceeding the current threshold value flows to or from the storage battery, which is made by the determining unit, setting a current value to the charging device or the feeding device so that the current becomes less than the specified current threshold value within the specified allowable duration time.

Description

Power storage control device, power storage control method and power storage system

The present disclosure relates to a storage control device, a storage control method, and a storage system.

There has been proposed a power system that stores electric power obtained from natural energy such as sunlight and wind power in a storage battery such as a lithium ion secondary battery and uses the power stored in the storage battery (Patent Document 1 and the like) reference).

JP, 2016-039723, A

In a power generation, storage, and power supply system having a storage battery, a protection device is generally provided to protect the storage battery from excessive current flow. However, when a power source such as solar power generation is connected with a load such as a home appliance whose fluctuation in power consumption is not limited, the protective device detects an overcurrent, and the current is interrupted. The system will shut down suddenly. A sudden shutdown of the system results in a loss of charge and discharge opportunities, which reduces the efficiency of the system.

Thus, the present disclosure proposes a new and improved storage control device, storage control method, and storage system capable of improving the utilization efficiency of the system by obtaining more charging opportunities and discharging opportunities.

According to the present disclosure, a current threshold for a current flowing from the charging device to the storage battery or a current flowing from the storage battery to the power feeding device is specified, and a current having an amount exceeding the current threshold flows to or from the storage battery. A specifying unit that specifies an allowable allowable duration to be allowed for each of the current thresholds; a determination unit that determines whether a current having an amount exceeding the current threshold flows to or from the storage battery; According to the determination by the determination unit whether or not the exceeding amount of current flows to or from the storage battery, the allowable duration time specified if the current exceeding the current threshold flows to the storage battery And a setting unit configured to set a current value to the charging device or the power feeding device so as to fall below the identified current threshold value. It is.

Further, according to the present disclosure, a current threshold for current flowing from the charging device to the storage battery or current flowing from the storage battery to the power feeding device is specified, and a current having an amount exceeding the current threshold flows to or from the storage battery. Specifying an allowable duration for allowing each current threshold, determining whether a current having an amount exceeding the current threshold flows to or from the storage battery, and exceeding the current threshold The current value to the charging device or the feeding device such that the specified current threshold value is less than the specified allowable duration time according to the determination of whether or not a quantity of current is flowing to or from the storage battery. And providing a storage control method.

Further, according to the present disclosure, a storage battery, at least one charging device for supplying power to the storage battery, at least one power feeding device for supplying power using the power stored in the storage battery, and inflow of current to the storage battery Or a storage control device for controlling the flow of power from the storage battery, the storage storage control device specifying a current threshold value for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device; An identifying unit that specifies, for each of the current thresholds, an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery, and an amount of current exceeding the current threshold to the storage battery, or A determination unit that determines whether or not the storage battery is flowing, and whether the amount of current exceeding the current threshold is to the storage battery or the storage battery According to the determination by the determination unit whether or not it is flowing, if the current having an amount exceeding the current threshold is flowing to the storage battery, the charging is performed so as to fall below the identified current threshold within the specified allowable duration. A storage system is provided, comprising: a setting unit configured to set a current value to a device or the power feeding device.

As described above, according to the present disclosure, a new and improved storage control device, storage control method, and storage that can improve system utilization efficiency by obtaining more charging opportunities and discharging opportunities. A system is provided.

Note that the above-mentioned effects are not necessarily limited, and, along with or in place of the above-mentioned effects, any of the effects shown in the present specification, or other effects that can be grasped from the present specification May be played.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view illustrating an entire configuration example of a power storage system according to an embodiment of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view illustrating an entire configuration example of a power storage system according to an embodiment of the present disclosure. FIG. 2 is an explanatory view showing an example of a functional configuration of a protection device 100. FIG. 6 is an explanatory diagram showing an example of a functional configuration of a control device 120. It is explanatory drawing which shows the example of the value stored in an electric current threshold value table. It is explanatory drawing which shows the example of the value stored in an electric current threshold value table. It is an explanatory view showing an example of a value stored in a tolerance continuation time table. It is explanatory drawing which shows the example of the data stored in a priority order table. It is explanatory drawing which shows the example of the data stored in a priority order table. It is a flowchart which shows the operation example of the electrical storage system 1 which concerns on embodiment of this indication. It is a flowchart which shows the operation example of the electrical storage system 1 which concerns on embodiment of this indication. It is a flowchart which shows the operation example of the electrical storage system 1 which concerns on embodiment of this indication.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration will be assigned the same reference numerals and redundant description will be omitted.

The description will be made in the following order.
1. Embodiments of the present disclosure 1.1. Process 1.2. Configuration example 1.3. Operation example 2. Summary

<1. Embodiment of the present disclosure>
[1.1. Process]
Before describing the embodiment of the present disclosure in detail, the circumstances under which the present disclosure person has reached the embodiment of the present disclosure will be described.

There has been proposed an electric power system which stores electric power obtained from natural energy such as sunlight and wind power in a storage battery such as a lithium ion secondary battery and uses the power stored in the storage battery. Due to the characteristics of lithium ion secondary batteries, when overcharging or overdischarging occurs, metallic lithium is deposited on the electrodes, and when this is grown, a short circuit occurs inside the battery. For this reason, when using a lithium ion secondary battery, it is essential to provide a protection circuit for preventing overcharge and overdischarge. In Japan, it is regulated by the Electrical Appliances and Materials Safety Act (JIS C 8712), a manual on the safe use of lithium ion secondary batteries, and the like. Overseas, IEC (International Electrotechnical Commission, International Electrotechnical Commission) complies with IEC 62133, in the United States with UL 2054 for household and commercial portable batteries, and with UL 9540 for energy storage systems and devices. Is defined.

Even if a charging device or discharging device with a value greater than or equal to the design value (maximum current) of the storage device is connected to the storage device, the storage device can be operated safely without unnecessarily enlarging the storage device and observing the above restrictions. There is a requirement to continue. Therefore, in a power generation, storage, and power supply system having a storage battery, a protection device is generally provided to protect the storage battery from excess current flow. However, when a power source such as solar power generation is connected with a load such as a home appliance whose fluctuation in power consumption is not limited, the protective device detects an overcurrent, and the current is interrupted. The system will shut down suddenly. A sudden shutdown of the system results in a loss of charge and discharge opportunities, which reduces the efficiency of the system. In order to avoid this point, a storage system having a large current capacity is required, and a system larger than a certain amount is required for the required supply power and the like.

The storage battery has a specification in which the allowable current is set stepwise according to its own temperature and voltage. Therefore, even in one storage system, the allowable current dynamically changes according to the use situation. Although the protection device is required as described above to meet the specification of the allowable current required by the storage battery and to be used safely, the protection device is required if the current value flowing to or from the storage battery exceeds a predetermined threshold. Operate. As a result, the storage battery loses the charge opportunity, and the load that receives the supply of power from the storage battery is stopped.

In this way, the charging device or load is connected such that the maximum charging current and discharging current is equal to or less than the threshold value set in the protection device so that charging to the storage battery and discharging from the storage battery is not stopped immediately by the protection device. Operation is also conceivable. However, when a plurality of charging devices or supply devices are connected, if the sum of the maximum charging current or discharging current exceeds the threshold set in the protection device, the total of the current values is always below the threshold. As described above, it is difficult to switch the charging device or the supplying device, and it can be used only by operating the charging device or the supplying device exclusively.

Further, in some charging devices connected to the storage battery, the charging current is not constant but fluctuates. There are many such cases, particularly when the charging device that generates electric power by natural energy as described above is connected to a storage battery. Such a charging device can not be connected to a system provided with a protective device whose threshold value is set smaller than the current value, although the operating time with the maximum charging current is actually short. This is also true for the load, and even though the time to operate at the maximum discharge current is actually short, in a system provided with a protection device whose threshold value is set smaller than that current value, such a load is can not connect.

Similarly, in the case of connecting a plurality of charging devices in which the charging current fluctuates, the other charging devices are controlled in accordance with the other charging currents despite the fact that the time for operating at the maximum charging current is actually short. It is difficult, the charging device has to be operated exclusively, the charging opportunity to the storage battery is lost. The same applies to the load, and it is difficult to control other loads in accordance with other discharge currents despite the fact that the operation time with the maximum discharge current is short, it is difficult to operate the load exclusively It has to be done and the discharge opportunity to the load is lost.

Therefore, in view of the above-mentioned point, the present disclosure person is keen on the technology which can connect the charging device and load having the maximum current value than the allowable current specification required by the storage battery and can obtain more charging opportunity and discharging opportunity. Study was carried out. As a result, the present disclosure person can connect a charging device or load having a maximum current value than the allowable current specification required by the storage battery, as described below, and can obtain more charging opportunities and discharging opportunities. We came to devise technology.

[1.2. Configuration example]
Subsequently, an example of the overall configuration of the power storage system according to the embodiment of the present disclosure will be described. FIG. 1 is an explanatory view showing an example of the overall configuration of a power storage system according to an embodiment of the present disclosure. Hereinafter, the entire configuration example of the power storage system according to the embodiment of the present disclosure will be described using FIG. 1.

As shown in FIG. 1, a storage system 1 according to an embodiment of the present disclosure includes a charging device 10, a supply device 20, a storage battery 30, a protection device 100, a control device 120, and a detection device 140. It is comprised including.

The charging device 10 is a device that generates power and supplies the power to the supply device 20 and the storage battery 30 through a power line. The charging device 10 may be, for example, a device that outputs power generated by a power plant, or may be a device that outputs power generated by sunlight, wind power, wave power, or other natural energy. . The power generated by the charging device 10 is also supplied to the supplying device 20 if the supplying device 20 is connected to the storage system 1. The power generated by the charging device 10 flows through the power line in a direct current state, but may be converted into alternating current and then flow through the power line.

The supply device 20 is a device that receives supply of power from the charging device 10 or the storage battery 30 through a power line, and supplies power to a device operated by power. Power lines are shown by solid lines in FIG. The supply device 20 may supply any device as long as it operates with electric power, and may be an air conditioner, a television, a refrigerator or other home appliance, a mobile such as an electric car, an electric two-wheeler, or the like.

Although FIG. 1 shows a storage system in which one charging device and one discharging device are connected, the present disclosure is not limited to such an example, and the storage system according to the embodiment of the present disclosure. A plurality of charging devices and discharging devices may be connected to each other. FIG. 2 is an explanatory view showing an example of the overall configuration of a power storage system according to the embodiment of the present disclosure. FIG. 2 illustrates the storage system 1 in which two charging devices 10a and 10b and two supply devices 20a and 20b are connected.

The storage battery 30 is, for example, a chargeable / dischargeable secondary battery such as a lithium ion secondary battery. Storage battery 30 receives and stores the power output from charging device 10, and discharges the power to supply device 20 connected to power storage system 1.

Protection device 100 is a protection device having a current threshold value corresponding to the state (temperature, voltage) of storage battery 30 in accordance with the specifications of storage battery 30. The protection device 100 also has a set value of allowable duration for each current threshold. The allowable duration is the time during which current exceeding the current threshold is allowed to flow continuously. The protection device 100 has a function of interrupting the current flowing to or from the storage battery 30 when the current exceeding the current threshold flows for the allowable duration or more.

Detection device 140 has a function of detecting a current value flowing to or from storage battery 30. The detection device 140 has a function of outputting information on a current value flowing to or from the storage battery 30 to the control device 120.

Control device 120 sets in advance the setting value of the allowable duration for each current threshold of protection device 100, or sets the allowable duration by communication with protection device 100. Then, control device 120 has current charging for each operation and setting of priority of control for starting or stopping operation for charging device 10 and supplying device 20. Further, the control device 120 acquires, from the detection device 140, information on the current value flowing to or from the storage battery 30. When the current value exceeds the current threshold, the control device 120 sends the charging device 10 and the supply device 20 to the charging device 10 and the supply device 20 until the current value falls below the current threshold in the order of lower priority of control within the allowable duration. Control the current for each operation or stop the operation.

Communication between the control device 120 and the detection device 140 may be periodic communication. In addition, if the detection device 140 has information on the current threshold, the detection device 140 may notify the control device 120 by interrupt communication when detecting the amount of current exceeding the current threshold.

Then, when the current value acquired from detection device 140 falls below the current threshold value, control device 120 sequentially sets current control for each operation to charging device 10 and supply device 20 in order from the top of the control priority. Control to release or start the operation.

Heretofore, an example of the overall configuration of the storage system according to the embodiment of the present disclosure has been described using FIG. 1. Subsequently, a functional configuration example of the protection device 100 will be described.

FIG. 3 is an explanatory view showing a functional configuration example of the protection device 100. As shown in FIG. Hereinafter, a functional configuration example of the protection device 100 according to the embodiment of the present disclosure will be described using FIG. 3.

As shown in FIG. 3, the protection device 100 includes a communication unit 102, a current threshold specifying unit 104, an allowable continuation time specifying unit 106, a current interrupting unit 107, and a storage unit 108.

The communication unit 102 has a function of acquiring information from the outside and outputting information to the outside. The communication unit 102 acquires, for example, the state of the storage battery 30, such as temperature and voltage, and outputs information on the current threshold value and the allowable duration time held by the protection device 100 to the control device 120.

The current threshold specifying unit 104 specifies a current threshold for the storage battery 30 based on the state of the storage battery 30 acquired by the communication unit 102. The current threshold specifying unit 104 specifies a current threshold for the storage battery 30, for example, based on the information of the current threshold table held by the protection device 100.

The allowable duration identifying unit 106 identifies the allowable duration for the current threshold identified by the current threshold identifying unit 104. The allowable duration specification unit 106 specifies the allowable duration for the storage battery 30, for example, based on the information of the allowable duration table held by the protection device 100. The current threshold value specifying unit 104 and the allowable duration specification unit 106 may be realized, for example, by a processor such as a CPU sequentially executing a computer program.

When the current exceeding the threshold value flows to or from the storage battery 30 beyond the allowable duration time specified by the allowable duration time specifying unit 106, the current interrupting unit 107 cuts off the current. The current interrupting unit 107 may be configured of, for example, a switch provided on a power line and a circuit that controls the operation of the switch. The storage unit 108 is configured by, for example, a ROM (Read Only Memory) or a RAM (Random Access Memory), and stores various information and computer programs for the operation of the protection device 100. In the present embodiment, the storage unit 108 stores the current threshold value table and the allowable duration time table described above.

Heretofore, a functional configuration example of the protection device 100 according to the embodiment of the present disclosure has been described using FIG. 3. Subsequently, a functional configuration example of the control device 120 will be described.

FIG. 4 is an explanatory view showing an example of a functional configuration of the control device 120. As shown in FIG. Hereinafter, a functional configuration example of the control device 120 according to the embodiment of the present disclosure will be described using FIG. 4.

As shown in FIG. 4, the control device 120 according to the embodiment of the present disclosure includes the communication unit 122, the determination unit 124, the current setting value calculation unit 126, the current setting unit 127, the timer 128, and storage. And a section 129.

The communication unit 122 has a function of acquiring information from the outside and outputting information to the outside. The communication unit 122 acquires, for example, information on the current threshold and the allowable duration from the protection device 100, acquires information on the current value from the detection device 140, and operates each of the charging device 10 and the supply device 20. Output a signal for controlling to start or stop operation.

The determination unit 124 determines whether the current value acquired from the detection device 140 exceeds or falls below the current threshold. If the current value acquired from the detection device 140 exceeds the current threshold, the determination unit 124 starts the operation of the timer 128.

The current setting value calculation unit 126 calculates a current value to be reduced by the charging device 10 or the supply device 20 when the current value acquired from the detection device 140 exceeds the current threshold. In this case, the current setting value calculation unit 126 performs a process of subtracting the current threshold value from the current value acquired from the detection device 140. The current setting value calculation unit 126 also calculates a current value to be alleviated for the charging device 10 and the supply device 20 when the current value acquired from the detection device 140 falls below the current threshold. In this case, the current setting value calculation unit 126 performs a process of subtracting the current value acquired from the detection device 140 from the current threshold value.

Then, when the current value acquired from the detection device 140 exceeds the current threshold value, the current setting value calculation unit 126 is configured to limit the charging device 10 to be limited based on the current value to be reduced calculated by the current setting value calculation unit 126. Calculate the current setting value. In this case, the current setting value calculation unit 126 is a charging device that should be limited so that it is smaller than a value obtained by subtracting the current value to be reduced calculated by the current setting value calculation unit 126 from the current value output from the charging device 10. Calculate 10 current settings. Further, when the current value acquired from the detection device 140 falls below the current threshold value, the current setting value calculation unit 126 should reduce the charging device 10 to be relaxed based on the current value to be mitigated calculated by the current setting value calculation unit 126. Calculate the current setting value of. In this case, the current setting value calculation unit 126 charges the current to be reduced so that it is smaller than a value obtained by adding the current value to be reduced calculated by the current setting value calculation unit 126 to the current value output by the charging device 10. Calculate the current setting of the device 10.

The current setting unit 127 performs current limitation or relaxation on the target charging device 10 based on the current setting value of the charging device 10 calculated, current, or limitation calculated by the current setting value calculation unit 126. Do. In this case, the current setting unit 127 performs current limitation or relaxation on the target charging device 10 before the value of the timer 128 reaches the allowable duration. The determination unit 124, the current setting value calculation unit 126, and the current setting unit 127 may be realized, for example, by a processor such as a CPU sequentially executing a computer program.

The charging device 10 to be restricted or mitigated can be determined based on, for example, information in the current limit or stop priority table. The priority order table is stored, for example, in the storage unit 129.

In addition, although the process with respect to the charging device 10 was shown in the above-mentioned description, the same may be said of the process with respect to the supply device 20.

The timer 128 is a timer that operates when the current value acquired from the detection device 140 exceeds the current threshold.

The storage unit 129 includes, for example, a ROM, a RAM, and the like, and stores various information and computer programs for the operation of the control device 120. In the present embodiment, the storage unit 129 stores the above-described priority table, and information on the current threshold and the allowable duration acquired from the protection device 100. In addition, the storage unit 129 may store data of a current threshold value table or an allowable continuation time table acquired from the protection device 100 or set in advance.

The functional configuration example of the control device 120 according to the embodiment of the present disclosure has been described above. Subsequently, data used in the power storage system 1 according to the embodiment of the present disclosure will be described.

FIG. 5 is an explanatory view showing an example of values stored in the current threshold value table. In the example shown in FIG. 5, the current threshold for the charging direction is stored. A voltage is specified on the vertical axis, and a temperature is specified on the horizontal axis, and a current threshold value for the charging direction is set for each voltage range and each temperature range. For example, between -25 ° C. and 0 ° C., the current threshold is 0 A at any voltage, and at a voltage of 3.6 V or more, the current threshold is 0 A at any voltage.

When current flows to storage battery 30, protection device 100 refers to the current threshold table as shown in FIG. 5 and determines the current threshold based on the state of the voltage and temperature of storage battery 30.

FIG. 6 is an explanatory view showing an example of values stored in the current threshold value table. In the example shown in FIG. 6, the current threshold for the discharge direction is stored. A voltage is defined on the vertical axis, and a temperature is defined on the horizontal axis, and a current threshold for the discharge direction is set for each voltage range and each temperature range.

When current flows from storage battery 30, protection device 100 refers to the current threshold table as shown in FIG. 6 and determines the current threshold based on the state of the voltage and temperature of storage battery 30.

FIG. 7 is an explanatory view showing an example of values stored in the allowable duration table. In the example shown in FIG. 7, an allowable duration for allowing the current flowing to or from storage battery 30 to exceed the threshold is set for each current threshold stored in the current threshold table. The allowable duration table is assumed to be possessed by the protection device 100, but as described above, the allowable duration table may also be possessed by the control device 120.

Next, an example of information in the priority order table is shown. The priority order table is a table that defines the order in which the operations of the charging device 10 and the supply device 20 are limited. FIG. 8 is an explanatory view showing an example of data stored in a priority order table in which priorities for charging devices are defined. The priority order table stores information on the order, devices subject to restriction, and setting values for devices subject to restriction. In the priority table shown in FIG. 8, the current limit setting value of the charging device 10a (charging device 1) is initially set to 15A. That is, in the priority table shown in FIG. 8, first, the current limit setting value is set for the charging device 10a (charging device 1), and then the current limit setting value for the charging device 10b (charging device 2) is set. It will be set.

FIG. 9 is an explanatory view showing an example of data stored in a priority order table in which priorities for supply devices are defined. The priority order table stores information on the order, devices subject to restriction, and setting values for devices subject to restriction. In the priority table shown in FIG. 9, the current limit setting value of the supply device 20a (supply device 1) is initially set to 10A. That is, in the priority table shown in FIG. 9, first, the current limit setting value is set for the supply device 20a (supply device 1), and then the current limit setting value for the supply device 20b (supply device 2) is set. It will be set.

The priority is set based on various conditions, and is not limited to a specific order. For example, priorities may be set so that the supply of power to more important loads is maintained to the end. For example, a device that supplies power to a television, an audio device, or the like may be given top priority, an air conditioner or a refrigerator may be given second priority, and a device with the lowest priority may be used as the lighting device. Also, priorities may be set such that more economical charging devices operate to the end. For example, priority may be set to first limit charging from the grid power, then limit charging from the fuel cell, and finally limit charging from natural energy such as solar power generation.

[1.3. Operation example]
Subsequently, an operation example of the power storage system 1 according to the embodiment of the present disclosure will be described. 10 to 12 are flowcharts showing an operation example of the storage system 1 according to the embodiment of the present disclosure. FIGS. 10 to 12 show an operation example of the storage system 1 when current limitation is applied in the direction of charging of the storage battery 30. Hereinafter, an operation example of the storage system 1 according to the embodiment of the present disclosure will be described.

Detection device 140 periodically detects a current value flowing to storage battery 30 (step S101). The detection device 140 transmits the detected current value to the control device 120. Parallel to the detection of the current value by the detection device 140, the protection device 100 acquires the state of the storage battery 30 (step S102). The communication unit 102 executes, for example, acquisition of the state of the storage battery 30. When the protection device 100 acquires the state of the storage battery 30, the protection device 100 refers to the current threshold table to specify the corresponding current threshold (step S103). For example, the current threshold specifying unit 104 executes the specification of the current threshold. After specifying the current threshold, the protection device subsequently refers to the allowable duration table and identifies the corresponding allowable duration from the current threshold (step S104). The identification of the allowable duration is performed by, for example, the allowable duration identifying unit 106. The protection device 100 transmits information of the identified current threshold and allowable duration to the control device 120.

The control device 120 acquires the current current threshold from the protection device 100 (step S111), and acquires the current allowable duration (step S112). The communication unit 122 executes, for example, acquisition of the current threshold and the allowable duration.

When acquiring the current value from the detection device 140 (step S121), the control device 120 determines whether the current value acquired from the detection device 140 is larger than the current threshold value acquired from the protection device 100 (step S122). The communication unit 122, for example, executes the acquisition of the current value. Further, for example, the determination unit 124 executes magnitude comparison between the current value and the current threshold value.

If the current value is larger than the current threshold (Yes in step S122), the control device 120 starts counting of the timer 128 (step S123). Subsequently, control device 120 specifies a charging device to which the amount of current is to be limited based on the information in the priority order table (step S124). This determination is performed by, for example, the determination unit 124.

After identifying the charging device whose current amount is to be limited, the control device 120 subsequently obtains the current value flowing from the charging device (step S125). The communication unit 122, for example, executes the acquisition of the current value. After obtaining the current value flowing from the charging apparatus whose current amount is to be limited, the control device 120 subsequently calculates the current value (the current Δ value) to be reduced (step S126). The current set value calculation unit 126 executes the calculation of the current Δ value.

After calculating the current Δ value, subsequently, control device 120 calculates the current setting value of the charging device for which the amount of current is to be limited (step S127). The calculation of the current set value is performed by the current set value calculator 126. Specifically, the current setting value is calculated to be smaller than a value obtained by subtracting the current Δ value from the current of the charging device. However, when the setting value of the charging device does not have a new setting value satisfying the condition of the setting value, the control device 120 stops the operation of the charging device.

After calculating the current setting value of the charging device whose current amount should be limited, the control device 120 performs current limit setting for the charging device whose current amount is to be limited within the allowable continuation time acquired from the protection device 100 (see FIG. Step S128). For example, the current setting unit 127 executes the current limit setting.

When the current limit setting is performed on the charging device whose current amount is to be limited, control device 120 ends the count of timer 128 (step S129).

On the other hand, when the current value is equal to or less than the current threshold (No at step S122), control device 120 specifies a charging device capable of alleviating the limitation of the current amount based on the information of the priority order table (step S131). This determination is performed by, for example, the determination unit 124.

When the charging device capable of alleviating the limitation of the current amount is specified, the control device 120 subsequently obtains the value of the current flowing from the charging device (step S132). The communication unit 122, for example, executes the acquisition of the current value. Upon acquiring the current value flowing from the charging device capable of alleviating the limitation of the current amount, the control device 120 subsequently calculates a reducible current value (referred to as a current Δ value) (step S133). The current set value calculation unit 126 executes the calculation of the current Δ value.

After calculating the current Δ value, subsequently, control device 120 calculates the current setting value of the charging device capable of alleviating the limitation of the current amount (step S134). The calculation of the current set value is performed by the current set value calculator 126. Specifically, the current setting value is calculated to be smaller than a value obtained by adding the current Δ value to the current of the charging device. However, when the setting value of the charging device does not have a new setting value satisfying the condition of the setting value, control device 120 maintains the current setting of the charging device.

When the control device 120 calculates the current setting value of the charging device capable of alleviating the limitation of the current amount, the control device 120 performs the current limit setting for the charging device capable of alleviating the limitation of the current amount (step S135). For example, the current setting unit 127 executes the current limit setting.

The protection device 100, the control device 120, and the detection device 140 according to the embodiment of the present disclosure perform the above-described series of operations to thereby set a charging device or load having a maximum current value than the allowable current specification required by the storage battery 30. Can be connected, and it is possible to obtain more charge opportunities and discharge opportunities.

<2. Summary>
As described above, according to the embodiment of the present disclosure, it is possible to connect a charging device or load having a maximum current value than the allowable current specification required by the storage battery 30, and to obtain more charging opportunities and discharging opportunities. , The control device 120 and the detection device 140 can be provided.

Although the protection device 100, the control device 120, and the detection device 140 have been described as being separate devices in the above embodiment, the present invention is not limited to such an example. For example, the functions of the protection device 100 and the functions of the control device 120 may be formed on separate circuits, and those circuits may be provided in one device.

The steps in the process performed by each device in the present specification do not necessarily have to be processed chronologically in the order described as the sequence diagram or the flowchart. For example, each step in the process performed by each device may be processed in an order different from the order described as the flowchart or may be processed in parallel.

It is also possible to create a computer program for causing hardware such as a CPU, a ROM, and a RAM built in each device to exhibit the same function as the configuration of each device described above. A storage medium storing the computer program can also be provided. In addition, by configuring each functional block shown in the functional block diagram by hardware, a series of processing can be realized by hardware.

The preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, but the technical scope of the present disclosure is not limited to such examples. It is obvious that those skilled in the art of the present disclosure can conceive of various modifications or alterations within the scope of the technical idea described in the claims. It is understood that also of course falls within the technical scope of the present disclosure.

In addition, the effects described in the present specification are merely illustrative or exemplary, and not limiting. That is, the technology according to the present disclosure can exhibit other effects apparent to those skilled in the art from the description of the present specification, in addition to or instead of the effects described above.

The following configurations are also within the technical scope of the present disclosure.
(1)
Specify the current threshold for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device, and allow an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery An identifying unit that identifies each of the current thresholds;
A determination unit that determines whether a current having an amount exceeding the current threshold flows to or from the storage battery;
In accordance with the determination in the determination unit whether or not the current having an amount exceeding the current threshold flows to or from the storage battery, it is specified if the current having an amount exceeding the current threshold flows to the storage battery A setting unit configured to set a current value to the charging device or the feeding device so as to fall below the identified current threshold value within the allowable duration time;
A storage control device comprising:
(2)
The storage control device according to (1), wherein the identification unit identifies the current threshold based on a state of the storage battery.
(3)
The storage control device according to (2), wherein the identification unit identifies the allowable duration based on the identified current threshold.
(4)
The storage control device according to (2) or (3), wherein the state of the storage battery is a temperature and a voltage of the storage battery.
(5)
The setting unit sets the current value to the charging device or the power feeding device based on the priority set to the charging device or the power feeding device according to any one of (1) to (4). Power storage control device.
(6)
The storage control device according to any one of (1) to (5), further including a storage unit that stores information of the current threshold and the allowable duration.
(7)
The storage control device according to any one of (1) to (6), further including a detection unit that detects a current value of the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device.
(8)
Specify the current threshold for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device, and allow an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery Specifying for each of the current thresholds;
Determining whether a current of an amount exceeding the current threshold is flowing to or from the storage battery;
The charging device or the charging device or the charging device or the charging device is configured to fall below the identified current threshold within the identified allowable duration according to the determination of whether or not the amount of current exceeding the current threshold is flowing to or from the storage battery. Setting the current value to the feeding device;
A storage control method, including:
(9)
A storage battery,
At least one charging device for supplying power to the storage battery;
At least one power feeding device for feeding power using the power stored in the storage battery;
A storage control device for controlling the inflow of current to the storage battery or the outflow of power from the storage battery;
Equipped with
The storage controller is
Specify the current threshold for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device, and allow an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery An identifying unit that identifies each of the current thresholds;
A determination unit that determines whether a current having an amount exceeding the current threshold flows to or from the storage battery;
In accordance with the determination in the determination unit whether or not the current having an amount exceeding the current threshold flows to or from the storage battery, it is specified if the current having an amount exceeding the current threshold flows to the storage battery A setting unit configured to set a current value to the charging device or the feeding device so as to fall below the identified current threshold value within the allowable duration time;
Power storage system.

100 protector 120 controller 140 detector

Claims (9)

Specify the current threshold for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device, and allow an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery An identifying unit that identifies each of the current thresholds;
A determination unit that determines whether a current having an amount exceeding the current threshold flows to or from the storage battery;
In accordance with the determination in the determination unit whether or not the current having an amount exceeding the current threshold flows to or from the storage battery, it is specified if the current having an amount exceeding the current threshold flows to the storage battery A setting unit configured to set a current value to the charging device or the feeding device so as to fall below the identified current threshold value within the allowable duration time;
A storage control device comprising: The storage control device according to claim 1, wherein the identification unit identifies the current threshold based on a state of the storage battery. The storage control device according to claim 2, wherein the identification unit identifies the allowable duration based on the identified current threshold value. The storage control device according to claim 2, wherein the state of the storage battery is a temperature and a voltage of the storage battery. The storage control device according to claim 1, wherein the setting unit sets a current value to the charging device or the feeding device based on a priority set to the charging device or the feeding device. The storage control device according to claim 1, further comprising a storage unit that stores information of the current threshold and the allowable duration. The storage control device according to claim 1, further comprising: a detection unit that detects a current value of the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device. Specify the current threshold for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device, and allow an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery Specifying for each of the current thresholds;
Determining whether a current of an amount exceeding the current threshold is flowing to or from the storage battery;
The charging device or the charging device or the charging device or the charging device is configured to fall below the identified current threshold within the identified allowable duration according to the determination of whether or not the amount of current exceeding the current threshold is flowing to or from the storage battery. Setting the current value to the feeding device;
A storage control method, including: A storage battery,
At least one charging device for supplying power to the storage battery;
At least one power feeding device for feeding power using the power stored in the storage battery;
A storage control device for controlling the inflow of current to the storage battery or the outflow of power from the storage battery;
Equipped with
The storage controller is
Specify the current threshold for the current flowing from the charging device to the storage battery or the current flowing from the storage battery to the power feeding device, and allow an allowable duration for allowing an amount of current exceeding the current threshold to flow to or from the storage battery An identifying unit that identifies each of the current thresholds;
A determination unit that determines whether a current having an amount exceeding the current threshold flows to or from the storage battery;
In accordance with the determination in the determination unit whether or not the current having an amount exceeding the current threshold flows to or from the storage battery, it is specified if the current having an amount exceeding the current threshold flows to the storage battery A setting unit configured to set a current value to the charging device or the feeding device so as to fall below the identified current threshold value within the allowable duration time;
Power storage system.

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