WO2016047040A1 - 蓄電システム、制御装置、および制御方法 - Google Patents
蓄電システム、制御装置、および制御方法 Download PDFInfo
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- WO2016047040A1 WO2016047040A1 PCT/JP2015/004267 JP2015004267W WO2016047040A1 WO 2016047040 A1 WO2016047040 A1 WO 2016047040A1 JP 2015004267 W JP2015004267 W JP 2015004267W WO 2016047040 A1 WO2016047040 A1 WO 2016047040A1
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- battery
- storage battery
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- storage
- battery module
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Definitions
- the present invention relates to a power storage system including a plurality of battery modules, a control device used in the power storage system, and a control method.
- a power storage system using a storage battery in which a plurality of battery modules are connected in series or in parallel is known.
- each battery module includes a plurality of battery cells and a battery control device that collects information on each battery cell.
- a technique for controlling a signal for balancing each battery module, a charge / discharge voltage, and a charge / discharge current based on information from each battery module see Patent Document 1). .
- the characteristics of the storage battery to be controlled are fixed, and the battery may be optimized to control the storage battery having the characteristics.
- the characteristics of the entire storage battery may change depending on the connection form of the battery modules.
- the connection form of a battery module is the same, if the characteristic of each storage battery module itself differs, the characteristic as the whole storage battery will also change. For this reason, it is difficult for the power storage system in which the characteristics of the storage battery to be controlled are fixed to control charging / discharging of the storage battery constituted by battery modules having different characteristics.
- An object of the present invention is to provide a technique for dynamically calculating a set value for controlling charge / discharge of a storage battery according to information obtained from individual battery modules constituting the storage battery.
- an electricity storage system includes a storage battery including a plurality of battery modules, a battery control unit connected to the plurality of battery modules included in the storage battery via a communication line, and a storage battery.
- a charge / discharge control unit connected via a power line.
- the battery control unit obtains characteristic information indicating physical characteristics of each battery module from each of the plurality of battery modules, and charges the storage battery based on the characteristic information of each battery module acquired by the characteristic acquisition unit.
- a calculation unit that calculates a set value for controlling discharge.
- the charge / discharge control unit controls charge / discharge of the storage battery based on the set value calculated by the calculation unit.
- Another aspect of the present invention is a control device.
- This device is characterized by acquiring characteristic information indicating physical characteristics of each battery module from each of a plurality of battery modules via a connection unit connected to a communication line connected to a storage battery including a plurality of battery modules. Based on the characteristic information of each battery module acquired by the acquisition unit, the characteristic acquisition unit, a calculation unit that calculates a setting value for controlling charging / discharging of the storage battery, and a setting value calculated by the calculation unit And an output unit that outputs to a charge / discharge control device that controls charge / discharge.
- the present invention it is possible to dynamically calculate a set value for controlling charge / discharge of a storage battery according to information obtained from individual battery modules constituting the storage battery.
- FIG. 1 is a diagram schematically showing an overall configuration of a power storage system 1 according to an embodiment.
- the power storage system 1 includes a storage battery 10, a charge / discharge control unit 20, a battery control unit 30, an operation panel 40, a power line 50, a first communication line 60a, and a second communication line 60b.
- the storage battery 10 includes a first battery unit 12a and a second battery unit 12b.
- the first battery unit 12a and the second battery unit 12b are simply collectively referred to as “battery unit 12” unless otherwise specifically distinguished.
- FIG. 1 illustrates the case where the power storage system 1 includes two battery units 12, but the number of battery units 12 is not limited to two, and one or more battery units 12 may be connected in parallel. That's fine. Therefore, the number of battery units 12 included in the power storage system 1 may be one, or may be three or more.
- the first battery unit 12a includes a first battery module 14a, a second battery module 14b, a third battery module 14c, and a fourth battery module 14d.
- the second battery unit 12b includes a fifth battery module 14e, a sixth battery module 14f, a seventh battery module 14g, and an eighth battery module 14h.
- FIG. 1 illustrates the case where the first battery unit 12a and the second battery unit 12b each include four battery modules 14, but the number of battery modules 14 included in each battery unit is limited to four. Absent.
- Each battery unit 12 may be configured by connecting two or more battery modules 14 in series.
- the battery module 14 is a secondary battery that can be repeatedly charged and used. Although not shown, the battery module 14 is configured by, for example, a plurality of lithium ion secondary batteries called battery cells connected in series and in parallel.
- the battery module 14 further includes a measurement unit that measures time-varying physical characteristics such as a current voltage of the battery module 14, a current that is being charged or discharged, an SOC (State of Charge), a temperature, and a measurement value.
- a transmission / reception unit for transmitting to the outside and receiving a control signal from the outside is also included.
- the transmitter / receiver can also transmit a time-invariant fixed value indicating the physical characteristics of the battery module 14 to the outside. Details of the fixed value indicating the physical characteristics of the battery module 14 will be described later.
- the battery cell is not limited to a lithium ion secondary battery, and may be a secondary battery other than this.
- the storage battery may be a nickel metal hydride battery or a nickel cadmium battery.
- the battery unit 12 is an assembled battery configured by connecting a plurality of battery modules 14 in series.
- the storage battery 10 is configured by further connecting one or a plurality of battery units 12 in parallel.
- the number of battery modules 14 included in the battery unit 12 is referred to as “series number Ns”, and the number of battery units 12 included in the storage battery 10 is referred to as “parallel number Np”.
- the storage battery 10 includes a plurality of battery units 12, that is, when the parallel number Np is 2 or more, it is assumed that the number of battery modules 14 included in each battery unit 12 is the same. Therefore, the total number Nt of battery modules 14 included in the storage battery 10 is given by the product of the parallel number Np and the series number Ns. Furthermore, even when the number of battery units 12 included in the storage battery 10 is 1, that is, when a plurality of battery units 12 are not connected in parallel, the number of parallel units Np is described as “1” for convenience.
- the charge / discharge control unit 20 is connected to the storage battery 10 via the power line 50.
- the charge / discharge control unit 20 controls charge / discharge of the storage battery 10.
- the charge / discharge control unit 20 is configured by a circuit independent of the storage battery 10 and the battery control unit 30, and functions as a charge / discharge control device for the storage battery 10.
- the charge / discharge control unit 20 includes a bidirectional inverter.
- the DC terminal of the bidirectional inverter is electrically connected to the power line 50.
- the AC terminal of the bidirectional inverter is electrically connected to the system power supply 2 and a load (not shown).
- the system power supply 2 is an AC power supply supplied by an electric power company.
- the bidirectional inverter converts the DC power discharged from the storage battery 10 into AC power and outputs it.
- the bidirectional inverter also converts AC power from the system power supply 2 into DC power and outputs it to the power line 50.
- the storage battery 10 is charged with the power of the system power supply 2 converted into DC power by a bidirectional inverter, for example, at night.
- the power stored in the storage battery 10 is converted into AC power by a bidirectional inverter and supplied to the load, and is used as backup power when the system power supply 2 is peak cut or when the system power supply 2 fails.
- the battery control unit 30 is connected to each battery module 14 of the first battery unit 12a via the first communication line 60a.
- the battery control unit 30 is also connected to each battery module 14 of the second communication line 60b and the second battery unit 12b.
- first communication line 60a and the second communication line 60b are simply referred to as “communication line 60” unless otherwise specifically distinguished.
- the battery control unit 30 is connected to one battery unit 12 via one communication line 60. Therefore, the battery control unit 30 includes a first connection unit 31a, a second connection unit 31b, and a third connection unit 31c.
- the first connection unit 31a functions as a first connection terminal connected to the first communication line 60a.
- the 2nd connection part 31b functions as a 2nd connection terminal connected with the 2nd communication line 60b.
- the third connection unit 31 c is not connected to any communication line 60.
- the first connection portion 31a, the second connection portion 31b, and the third connection portion 31c are simply referred to as the “connection portion 31” unless specifically distinguished.
- the number of communication lines 60 matches the value of the parallel number Np. If the storage battery 10 includes three battery units 12 in the example illustrated in FIG. 1, the third battery unit 12 is connected to the battery control unit 30 via the third communication line. This communication line is connected to the third connection portion 31c.
- the battery control unit 30 calculates a set value for controlling charge / discharge of the storage battery 10 and outputs the set value to the charge / discharge control unit 20.
- the battery control unit 30 is configured by a circuit independent of the storage battery 10 and the charge / discharge control unit 20, and functions as a control device that calculates a set value for the charge / discharge control unit 20 to control the storage battery 10.
- the charge / discharge control unit 20 controls the charge / discharge of the storage battery 10 based on the set value calculated by the battery control unit 30.
- the operation panel 40 is provided on the surface of a housing (not shown) of the power storage system 1.
- the operation panel 40 is connected to the battery control unit 30.
- the operation panel 40 functions as a user interface for the user to input information used to calculate a set value for controlling charging / discharging of the storage battery 10 to the battery control unit 30.
- the operation panel 40 and the charge / discharge control unit 20 may be connected.
- the battery control unit 30 acquires information used to calculate a set value for controlling charging / discharging of the storage battery 10 from the charging / discharging control unit 20.
- FIG. 2 is a diagram schematically illustrating a functional configuration of the battery control unit 30 according to the embodiment.
- the battery control unit 30 includes a connection unit 31, a characteristic acquisition unit 32, a calculation unit 33, a configuration information acquisition unit 34, and an output unit 35.
- FIG. 2 shows a functional configuration for the battery control unit 30 according to the embodiment to calculate a set value for controlling charging / discharging of the storage battery 10, and other configurations are omitted.
- each element described as a functional block for performing various processes can be configured by a CPU (Central Processing Unit), a main memory, and other LSI (Large Scale Integration) in hardware.
- CPU Central Processing Unit
- main memory main memory
- LSI Large Scale Integration
- the characteristic acquisition unit 32 acquires physical information indicating the physical characteristics of each battery module 14 from each of the plurality of battery modules 14.
- “physical information indicating the physical characteristics of each battery module 14” includes a measured value of the current physical characteristics of each battery module 14 and a fixed value indicating the physical characteristics of each battery module 14.
- the “measured value of the current physical property of the battery module 14” is information such as the current voltage, the current being charged or discharged, the SOC, and the temperature of the battery module 14 measured by the measurement unit described above.
- the “fixed value indicating the physical characteristics of the battery module 14” is a threshold value for charge / discharge control determined based on the physical characteristics of the battery module 14. Specific examples of fixed values indicating the physical characteristics of the battery module 14 include “charge / discharge termination threshold”, “overvoltage warning threshold”, “overcurrent warning threshold”, and “overtemperature warning threshold”. Can be mentioned.
- the charge / discharge termination threshold includes a charge stop threshold for suppressing the battery module 14 from being overcharged, and a discharge stop threshold for suppressing the battery module 14 from being overdischarged.
- the battery module 14 has a maximum charge capacity that can be charged depending on the type and number of battery cells constituting the battery module 14. Therefore, the charge stop threshold is defined using the SOC of the battery module 14 and the voltage of the battery module 14 at that time. Similarly, the discharge stop threshold is also defined using the SOC and voltage of the battery module 14.
- the charge / discharge of the battery module 14 is stopped when the SOC of the battery module 14 exceeds the range having the charge stop threshold as the upper limit and the discharge stop threshold as the lower limit. There is a need.
- the overvoltage warning threshold is a threshold for suppressing the battery module 14 from becoming overvoltage during charging. When the charging voltage of the battery module 14 exceeds the overvoltage warning threshold, charging to the battery module 14 needs to be stopped.
- the overcurrent warning threshold is a threshold for suppressing the battery module 14 from becoming overcurrent during charging. When the amount of current flowing through the battery module 14 exceeds the overcurrent warning threshold, charging to the battery module 14 needs to be stopped.
- the over temperature warning threshold is a temperature that defines an upper limit value in a temperature range in which the battery module 14 can be charged and discharged. When the temperature of the battery module 14 exceeds the overtemperature warning threshold, charging of the battery module 14 needs to be stopped.
- the plurality of battery modules 14 included in the storage battery 10 are batteries manufactured according to the same standard, and all have fixed values indicating similar physical characteristics.
- the calculation unit 33 calculates a set value for controlling charging / discharging of the storage battery 10 based on the fixed value of each battery module 14 acquired by the characteristic acquisition unit 32.
- the output unit 35 outputs the set value calculated by the calculation unit 33 to the charge / discharge control unit 20.
- the battery module 14 is configured by connecting a plurality of battery cells.
- the fixed value indicating the physical characteristics of the battery module 14 may vary depending on the number of battery cells and the type of battery in the battery cell.
- the battery modules 14 constituting the storage battery 10 are also replaced.
- exchange may also arise.
- the fixed value of the battery module 14 constituting the storage battery 10 before replacement may not match the fixed value of the battery module 14 configuring the storage battery 10 after replacement.
- the characteristic acquisition unit 32 dynamically acquires a fixed value indicating the physical characteristic of each battery module 14 from each of the plurality of battery modules 14, whereby the calculation unit 33 is appropriate for controlling charging / discharging of the storage battery 10. It is possible to calculate a set value.
- the calculation unit 33 can calculate the set value of the entire storage battery 10 instead of the control parameter of the individual battery module 14 itself from the characteristic information obtained from the individual battery module 14.
- the characteristic acquisition unit 32 Since the characteristic acquisition unit 32 is connected to each battery module 14 included in the storage battery 10, it can acquire a fixed value of each physical characteristic of the battery module 14. However, even if the fixed values of the physical characteristics of the battery modules 14 are all the same, it is not always possible to use the values as they are as the threshold value for charge / discharge control of the storage battery 10.
- the charge / discharge control unit 20 outputs a charging current of 90 [A] to the storage battery 10.
- the parallel number Np of the storage batteries 10 is 1, the charging current flowing through each battery module 14 included in the storage battery 10 is also 90 [A]. Therefore, in this case, the overcurrent warning threshold of the battery module 14 can be used as the warning threshold of the storage battery 10.
- the parallel number Np of the storage batteries 10 is 2
- the charging current flowing through each battery module 14 included in the storage battery 10 is divided into two and becomes 45 [A]. In this case, the overcurrent warning threshold of the battery module 14 cannot be used as it is as the warning threshold of the storage battery 10.
- the capacity that can be stored by the storage battery 10 is the sum of the maximum charging capacity that can be charged by the individual battery modules 14. Therefore, the calculation unit 33 cannot calculate the capacity that can be stored in the storage battery 10 only by acquiring the maximum charge capacity that can be charged by each battery module 14, and also the total number of battery modules 14 that the storage battery 10 includes. Necessary. Thus, the calculation unit 33 calculates a set value for controlling charging / discharging of the storage battery 10 based on the battery configuration information of the storage battery 10 in addition to the fixed value indicating the physical characteristics of each battery module 14. .
- battery configuration information is information indicating a connection form of a plurality of battery modules 14 constituting the storage battery 10. More specifically, the battery configuration information is information including the parallel number Np and the serial number Ns described above.
- the configuration information acquisition unit 34 receives input of battery configuration information from the user via the operation panel 40 and outputs the received battery configuration information to the calculation unit 33.
- the calculation unit 33 acquires the battery configuration information received by the configuration information acquisition unit 34.
- the set value for controlling charging / discharging of the storage battery 10 calculated by the calculation unit 33 is a charging / discharging control threshold value for controlling the storage battery 10 as one battery.
- the set value for controlling charging / discharging of the storage battery 10 corresponds to a fixed value indicating the physical characteristics of the battery module 14, and specific examples thereof include “charge / discharge termination threshold”, “overvoltage warning threshold”, “ “Overcurrent warning threshold”, “overtemperature warning threshold”, and the like.
- the calculation unit 33 calculates an overcurrent warning threshold value for controlling charging / discharging of the storage battery 10 by multiplying the overcurrent warning threshold value of each battery module 14 by the parallel number Np.
- the charging voltage applied to each battery module 14 is a value obtained by dividing the charging voltage applied to the storage battery 10 by the number of series Ns. For this reason, the calculation unit 33 calculates an overvoltage warning threshold for controlling charging / discharging of the storage battery 10 by multiplying the overvoltage warning threshold of each battery module 14 by the number Ns in series.
- the overtemperature warning threshold value for controlling charging / discharging of the storage battery 10 may be the same as the overtemperature warning threshold value of each battery module 14.
- FIG. 3 is a flowchart for explaining the flow of a setting value calculation process for controlling charging / discharging of the storage battery 10, which is executed by the battery control unit 30 according to the embodiment.
- the process in this flowchart starts when the power storage system 1 is activated, for example.
- the characteristic acquisition part 32 acquires the fixed value which shows the physical characteristic of each battery module 14 from each of the some battery module 14 which comprises the storage battery 10 (S2).
- the configuration information acquisition unit 34 acquires battery configuration information indicating the connection form of the plurality of battery modules 14 constituting the storage battery 10 (S4).
- the calculation unit 33 is a set value for controlling charging / discharging of the storage battery 10 based on the fixed value of each battery module 14 acquired by the characteristic acquisition unit 32 and the battery configuration information acquired by the configuration information acquisition unit 34. Is calculated (S6).
- the output unit 35 outputs the set value for controlling the charge / discharge of the storage battery 10 calculated by the calculation unit 33 to the charge / discharge control unit 20 (S8). When the output unit 35 outputs the set value to the charge / discharge control unit 20, the processing in this flowchart ends.
- a set value for controlling charging / discharging of the storage battery 10 can be dynamically calculated according to information obtained from each battery module 14 constituting the storage battery 10. Thereby, in order to control charging / discharging of the storage battery 10 of the storage battery 10 even when the connection form of the battery module 14 constituting the storage battery 10 is changed or when the characteristics of the battery module 14 itself constituting the storage battery 10 are changed. Can be automatically calculated. As a result, charge / discharge control of the storage battery 10 can be executed by replacing only the storage battery 10 without replacing the power storage system 1 itself.
- the calculation unit 33 uses the fixed value indicating the physical characteristics of each battery module 14 acquired by the characteristic acquisition unit 32 and the battery acquired from the user via the operation panel 40 acquired by the configuration information acquisition unit 34.
- the case where the set value for controlling charging / discharging of the storage battery 10 is calculated based on the configuration information has been described.
- the battery configuration information may not be acquired from the user, but may be derived and acquired by the calculation unit 33 based on other information. Hereinafter, this case will be described.
- the number of connection units 31 connected to the communication line 60 is the number of connection units 31. , which coincides with the parallel number Np.
- the communication line 60 is realized using, for example, an optical fiber, and communicates with each battery module 14 using a predetermined communication protocol.
- Each battery module 14 is assigned a unique address, and the characteristic acquisition unit 32 can identify each battery module 14 using the address. Therefore, the characteristic acquisition unit 32 can specify the number of battery modules 14 connected to the specific communication line 60, that is, the series number Ns, by counting the number of different addresses.
- the calculation unit 33 acquires the battery configuration information by acquiring the number of communication lines 60 as the parallel number Np and acquiring the number of battery modules 14 connected to each communication line 60 as the serial number Ns. Thereby, it can be omitted that the user inputs the battery configuration information, and the convenience of the power storage system 1 can be improved.
- the calculation unit 33 includes, in addition to the fixed value indicating the physical characteristic of each battery module 14 acquired by the characteristic acquisition unit 32, the characteristic information of the battery module 14 including the measured value of the current physical characteristic of each battery module 14. Is used to calculate battery configuration information. This case will be described below.
- FIG. 4 is a flowchart illustrating the flow of the battery configuration information calculation process executed by the battery control unit 30 according to the embodiment, and is a diagram illustrating the flow of the process of step S4 in FIG. 3 in more detail.
- the characteristic acquisition unit 32 adds the number of battery modules 14 connected to each communication line 60 and acquires the total number Nt of battery modules 14 constituting the storage battery 10 (S40). As described above, this can be realized by the characteristic acquisition unit 32 counting the number of different addresses.
- the calculation unit 33 acquires the value Ib of the charging current input to the storage battery 10 from the charge / discharge control unit 20 (S42).
- the characteristic acquisition unit 32 acquires the value Iu of the charging current flowing through each battery module 14 via the communication line 60 (S44).
- the calculation unit 33 is based on the charging current value Ib input to the storage battery 10 by the charge / discharge control unit 20 and the charging current value Im flowing through each battery module 14 acquired by the characteristic acquisition unit 32. Np is calculated (S46). As described above, the charging current Im flowing through each battery module 14 is a value obtained by dividing the charging current value Ib input to the storage battery 10 by the charge / discharge control unit 20 by the parallel number Np. Therefore, the calculation unit 33 calculates the parallel number Np by dividing the charging current value Ib input to the storage battery 10 by the charging / discharging control unit 20 by the charging current value Im flowing through each battery module 14. .
- the calculation unit 33 calculates the serial number Ns based on the calculated parallel number Np and the total number Nt of battery modules 14 connected to the communication line 60 (S48). In the storage battery 10 according to the embodiment, the number of battery modules 14 included in each power storage unit is the same. Therefore, the calculation unit 33 calculates the serial number Ns by dividing the total number Nt of battery modules 14 connected to the communication line 60 by the parallel number Np. The calculation unit 33 acquires battery configuration information including the parallel number Np and the series number Ns (S50). When the calculation unit 33 acquires the battery configuration information, the processing in this flowchart ends.
- the calculation unit 33 can calculate the battery configuration information using the characteristic information of the battery module 14. Thereby, for example, when all the battery modules 14 are connected by one communication line 60, even when the number of the communication lines 60 and the parallel number Np do not match, the calculation unit 33 can store the battery configuration information. Can be acquired automatically.
- the power storage system 1 is connected via the storage battery 10 including the plurality of battery modules 14, the battery control unit 30 connected to the plurality of battery modules 14 included in the storage battery 10 via the communication line 60, and the storage battery 10 via the power line 50.
- Charging / discharging control unit 20 The battery control unit 30 includes, from each of the plurality of battery modules 14, a characteristic acquisition unit 32 that acquires characteristic information indicating physical characteristics of each battery module 14, and characteristic information of each battery module 14 acquired by the characteristic acquisition unit 32.
- a calculation unit 33 that calculates a set value for controlling charging / discharging of the storage battery 10.
- the charge / discharge control unit 20 controls the charge / discharge of the storage battery 10 based on the set value calculated by the calculation unit 33.
- the calculation unit 33 may calculate the set value based on the battery configuration information indicating the connection form of the plurality of battery modules 14 constituting the storage battery 10 and the fixed value indicating the physical characteristics of each battery module 14. .
- the calculation unit 33 refers to the battery configuration information, and sets a setting value for controlling charging / discharging of the storage battery 10 using only a fixed value whose value is fixed among the characteristic information of the battery module 14. Can be calculated.
- the storage battery 10 is configured by connecting one or more battery units 12 in parallel, and the battery unit 12 is configured by connecting two or more battery modules 14 in series.
- the battery configuration information is information including a parallel number indicating the number of battery units 12 in the storage battery 10 and a serial number indicating the number of battery modules 14 included in each battery unit 12.
- the calculation unit 33 may calculate the set value based on the battery configuration information and the fixed value of each battery module 14. Thereby, it can be omitted that the calculation unit 33 automatically calculates the battery configuration information without bothering the user.
- You may further provide the structure information acquisition part 34 which receives the input of battery structure information.
- the calculation unit 33 may acquire the battery configuration information received by the configuration information acquisition unit.
- the battery control unit 30 is connected to one battery unit 12 via one communication line 60, and the calculation unit 33 acquires the number of communication lines 60 as a parallel number, and the battery connected to each communication line. Battery configuration information may be acquired by acquiring the number of modules 14 as a serial number. Thereby, the calculation part 33 can acquire battery configuration information automatically by this. It becomes unnecessary for the user to manually input the battery configuration information. As a result, the convenience of the power storage system 1 can be improved.
- the battery control unit 30 is connected to the storage battery 10 via a communication line 60 connected to each battery module 14, and the calculation unit 33 is based on the charging current input to the storage battery 10 and the charging current flowing through each battery module 14.
- the battery configuration information may be acquired by calculating the parallel number and calculating the serial number based on the parallel number and the number of battery modules 14 connected to the communication line 60. Thereby, for example, even when all the battery modules 14 are connected by one communication line 60, the calculation unit 33 can automatically acquire the battery configuration information. It becomes unnecessary for the user to manually input the battery configuration information.
- the control device 30 includes a connection unit 31 connected to the communication line 60 connected to the storage battery 10 including the plurality of battery modules 14, and physical characteristics of each battery module 14 from each of the plurality of battery modules 14 via the communication line 60.
- the characteristic acquisition unit 32 that acquires the characteristic information indicating the battery module 14 and the calculation unit 33 that calculates the set value for controlling charging / discharging of the storage battery 10 based on the characteristic information of each battery module 14 acquired by the characteristic acquisition unit 32.
- the output part 35 which outputs the setting value which the calculation part 33 calculated to the charging / discharging control apparatus 20 which controls charging / discharging of the storage battery 10 is provided.
- the calculation unit 33 may calculate the set value based on the battery configuration information indicating the connection form of the plurality of battery modules 14 constituting the storage battery 10 and the fixed value indicating the physical characteristics of each battery module 14. .
- the calculation unit 33 refers to the battery configuration information, and sets a setting value for controlling charging / discharging of the storage battery 10 using only a fixed value whose value is fixed among the characteristic information of the battery module 14. Can be calculated.
- the control method of the storage battery 10 including a plurality of battery modules 14 includes a step of acquiring characteristic information indicating the physical characteristics of each battery module 14 from each of the plurality of battery modules 14 and the acquired characteristic information of each battery module 14. And a step of calculating a set value for controlling charge / discharge of the storage battery 10 and a step of controlling charge / discharge of the storage battery 14 based on the calculated set value.
- the control program for the storage battery 10 including a plurality of battery modules 14 includes a process for acquiring characteristic information indicating the physical characteristics of each battery module 14 from each of the plurality of battery modules 14 and the acquired characteristic information for each battery module 14.
- the computer executes a process for calculating a set value for controlling the charge / discharge of the storage battery 10 and a process for controlling the charge / discharge of the storage battery 14 based on the calculated set value.
- the setting value for controlling charging / discharging of the storage battery 10 is changed. It can be calculated dynamically and charging / discharging of the storage battery 10 comprised by the battery module 14 from which a characteristic differs can be controlled.
- 1 power storage system 2 grid power supply, 10 storage battery, 12 battery unit, 14 battery module, 20 charge / discharge control unit, 30 battery control unit, 31 connection unit, 32 characteristic acquisition unit, 33 calculation unit, 34 configuration information acquisition unit, 35 Output unit, 40 operation panel, 50 power lines, 60 communication lines.
- the present invention can be used for a power storage system including a plurality of battery modules.
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Abstract
Description
上記の説明では、算出部33は、特性取得部32が取得した個々の電池モジュール14の物理特性を示す固定値と、構成情報取得部34が取得した操作パネル40を介してユーザから取得した電池構成情報とをもとに、蓄電池10の充放電を制御するための設定値を算出する場合について説明した。しかしながら、電池構成情報はユーザから取得せず、算出部33が他の情報をもとに導出して取得することもできる。以下、この場合について説明する。
上述した第1の変形例においては、ひとつの電池ユニット12が1本の通信線60を介して蓄電池10の接続部31と接続することを前提とした。つまり、第1の変形例においては、通信線60の数と並列数Npの数とが一致することを仮定していた。しかしながら、通信線60の数と並列数Npの数とが一致しない場合もあり得る。例えば図1に示すように複数の電池ユニット12が並列に接続されている場合であっても、各電池ユニット12に含まれる電池モジュール14が全て1本の通信線60によって接続されることも考えられる。このような場合、通信線60の数と並列数Npの数とは一致しない。
蓄電システム1は、複数の電池モジュール14を含む蓄電池10と、通信線60を介して蓄電池10に含まれる複数の電池モジュール14と接続する電池制御部30と、蓄電池10と電力線50を介して接続する充放電制御部20とを備える。電池制御部30は、複数の電池モジュール14それぞれから、各電池モジュール14の物理特性を示す特性情報を取得する特性取得部32と、特性取得部32が取得した各電池モジュール14の特性情報をもとに、蓄電池10の充放電を制御するための設定値を算出する算出部33とを備える。充放電制御部20は、算出部33が算出した設定値をもとに、蓄電池10の充放電を制御する。
これにより、蓄電池10を構成する電池モジュール14の特性が変更されたり、蓄電池10を構成する電池モジュール14の接続形態が変更されたりしても、算出部33は蓄電池10の充放電を制御するための設定値を動的に算出することができる。
[項目2]
算出部33は、蓄電池10を構成する複数の電池モジュール14の接続形態を示す電池構成情報と、各電池モジュール14の物理特性を示す固定値とをもとに、設定値を算出してもよい。
算出部33は、電池構成情報を参照することにより、電池モジュール14の特性情報のうち値の大きさが固定されている固定値のみを用いて蓄電池10の充放電を制御するための設定値を算出することができる。
[項目3]
蓄電池10は1以上の電池ユニット12が並列に接続されて構成され、当該電池ユニット12は2以上の電池モジュール14を直列に接続して構成されている。電池構成情報は、蓄電池10における電池ユニット12の数を示す並列数と各電池ユニット12が含む電池モジュール14の数を示す直列数とを含む情報である。算出部33は、電池構成情報と各電池モジュール14の固定値とをもとに、設定値を算出してもよい。
これにより、ユーザの手を煩わすことなく算出部33が自動で電池構成情報を算出することを省略できる。
[項目4]
電池構成情報の入力を受け付ける構成情報取得部34をさらに備えてもよい。算出部33は、構成情報取得部が受け付けた電池構成情報を取得してもよい。
これにより、算出部33が電池構成情報を算出することを省略できる。ユーザが手動で電池構成情報を入力するため、算出部33が計算によって取得する電池構成情報よりも、より精度の高い情報を利用できる点で効果がある。
[項目5]
電池制御部30は、ひとつの電池ユニット12に対してひとつの通信線60を介して接続し、算出部33は、通信線60の数を並列数として取得し、各通信線に接続される電池モジュール14の数を直列数として取得することで、電池構成情報を取得してもよい。
これにより、これにより、算出部33は、電池構成情報を自動で取得することができる。ユーザが電池構成情報を手動で入力することが不要となる。結果として、蓄電システム1の利便性を向上することができる。
[項目6]
電池制御部30は、各電池モジュール14と接続する通信線60を介して蓄電池10に接続し、算出部33は、蓄電池10に入力する充電電流と各電池モジュール14を流れる充電電流とをもとに並列数を算出し、当該並列数と通信線60に接続される電池モジュール14の数とをもとに直列数を算出することで、電池構成情報を取得してもよい。
これにより、例えば全ての電池モジュール14が1本の通信線60で接続されている場合であっても、算出部33は、電池構成情報を自動で取得することができる。ユーザが電池構成情報を手動で入力することが不要となる。
[項目7]
制御装置30は、複数の電池モジュール14を含む蓄電池10に接続される通信線60と接続する接続部31と、複数の電池モジュール14それぞれから、通信線60を介して各電池モジュール14の物理特性を示す特性情報を取得する特性取得部32と、特性取得部32が取得した各電池モジュール14の特性情報をもとに、蓄電池10の充放電を制御するための設定値を算出する算出部33と、算出部33が算出した設定値を、蓄電池10の充放電を制御する充放電制御装置20に出力する出力部35とを備える。
これにより、蓄電池10を構成する電池モジュール14の特性が変更されたり、蓄電池10を構成する電池モジュール14の接続形態が変更されたりしても、算出部33は蓄電池10の蓄電池10の充放電を制御するための設定値を動的に算出することができる。
[項目8]
算出部33は、蓄電池10を構成する複数の電池モジュール14の接続形態を示す電池構成情報と、各電池モジュール14の物理特性を示す固定値とをもとに、設定値を算出してもよい。
算出部33は、電池構成情報を参照することにより、電池モジュール14の特性情報のうち値の大きさが固定されている固定値のみを用いて蓄電池10の充放電を制御するための設定値を算出することができる。
[項目9]
複数の電池モジュール14を含む蓄電池10の制御方法は、複数の電池モジュール14それぞれから、各電池モジュール14の物理特性を示す特性情報を取得するステップと、取得した各電池モジュール14の特性情報をもとに、蓄電池10の充放電を制御するための設定値を算出するステップと、算出した設定値をもとに、蓄電池14の充放電を制御するステップと、を備える。
これにより、蓄電池10を構成する電池モジュール14の特性が変更されたり、蓄電池10を構成する電池モジュール14の接続形態が変更されたりしても、蓄電池10の充放電を制御するための設定値を動的に算出することができ、特性の異なる電池モジュール14によって構成される蓄電池10の充放電を制御することができる。
[項目10]
複数の電池モジュール14を含む蓄電池10の制御プログラムは、複数の電池モジュール14それぞれから、各電池モジュール14の物理特性を示す特性情報を取得する処理と、取得した各電池モジュール14の特性情報をもとに、蓄電池10の充放電を制御するための設定値を算出する処理と、算出した設定値をもとに、蓄電池14の充放電を制御する処理と、をコンピュータに実行させる。
これにより、蓄電池10を構成する電池モジュール14の特性が変更されたり、蓄電池10を構成する電池モジュール14の接続形態が変更されたりしても、蓄電池10の充放電を制御するための設定値を動的に算出することができ、特性の異なる電池モジュール14によって構成される蓄電池10の充放電を制御することができる。
Claims (9)
- 複数の電池モジュールを含む蓄電池と、
通信線を介して前記蓄電池に含まれる前記複数の電池モジュールと接続する電池制御部と、
前記蓄電池と電力線を介して接続する充放電制御部とを備え、
前記電池制御部は、
前記複数の電池モジュールそれぞれから、各電池モジュールの物理特性を示す特性情報を取得する特性取得部と、
前記特性取得部が取得した各電池モジュールの特性情報をもとに、前記蓄電池の充放電を制御するための設定値を算出する算出部とを備え、
前記充放電制御部は、前記算出部が算出した設定値をもとに、前記蓄電池の充放電を制御することを特徴とする蓄電システム。 - 前記算出部は、前記蓄電池を構成する前記複数の電池モジュールの接続形態を示す電池構成情報と、各電池モジュールの物理特性を示す固定値とをもとに、前記設定値を算出することを特徴とする請求項1に記載の蓄電システム。
- 前記蓄電池は1以上の電池ユニットが並列に接続されて構成され、当該電池ユニットは2以上の電池モジュールを直列に接続して構成されており、前記電池構成情報は、前記蓄電池における電池ユニットの数を示す並列数と各電池ユニットが含む電池モジュールの数を示す直列数とを含む情報であり、
前記算出部は、前記電池構成情報と各電池モジュールの固定値とをもとに、前記設定値を算出することを特徴とする請求項2に記載の蓄電システム。 - 前記電池構成情報の入力を受け付ける構成情報取得部をさらに備え、
前記算出部は、前記構成情報取得部が受け付けた前記電池構成情報を取得することを特徴とする請求項3に記載の蓄電システム。 - 前記電池制御部は、ひとつの前記電池ユニットに対してひとつの通信線を介して接続し、
前記算出部は、前記通信線の数を前記並列数として取得し、各通信線に接続される電池モジュールの数を前記直列数として取得することで、前記電池構成情報を取得することを特徴とする請求項3に記載の蓄電システム。 - 前記電池制御部は、各電池モジュールと接続する通信線を介して前記蓄電池に接続し、
前記算出部は、前記蓄電池に入力する充電電流と各電池モジュールを流れる充電電流とをもとに前記並列数を算出し、当該並列数と前記通信線に接続される電池モジュールの数とをもとに前記直列数を算出することで、前記電池構成情報を取得することを特徴とする請求項3に記載の蓄電システム。 - 複数の電池モジュールを含む蓄電池に接続される通信線と接続する接続部と、
前記複数の電池モジュールそれぞれから、前記通信線を介して各電池モジュールの物理特性を示す特性情報を取得する特性取得部と、
前記特性取得部が取得した各電池モジュールの特性情報をもとに、前記蓄電池の充放電を制御するための設定値を算出する算出部と、
前記算出部が算出した設定値を、前記蓄電池の充放電を制御する充放電制御装置に出力する出力部とを備えることを特徴とする制御装置。 - 前記算出部は、前記蓄電池を構成する前記複数の電池モジュールの接続形態を示す電池構成情報と、各電池モジュールの物理特性を示す固定値とをもとに、前記設定値を算出することを特徴とする請求項7に記載の制御装置。
- 複数の電池モジュールを含む蓄電池の制御方法であって、
前記複数の電池モジュールそれぞれから、各電池モジュールの物理特性を示す特性情報を取得するステップと、
取得した各電池モジュールの特性情報をもとに、前記蓄電池の充放電を制御するための設定値を算出するステップと、
算出した設定値をもとに、前記蓄電池の充放電を制御するステップと、
を備えることを特徴とする制御方法。
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