WO2011074390A1 - 電池モジュール制御システム及び電池モジュール制御方法 - Google Patents
電池モジュール制御システム及び電池モジュール制御方法 Download PDFInfo
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- WO2011074390A1 WO2011074390A1 PCT/JP2010/071174 JP2010071174W WO2011074390A1 WO 2011074390 A1 WO2011074390 A1 WO 2011074390A1 JP 2010071174 W JP2010071174 W JP 2010071174W WO 2011074390 A1 WO2011074390 A1 WO 2011074390A1
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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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/34—Gastight accumulators
- H01M10/345—Gastight metal hydride accumulators
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Definitions
- the present invention relates to a battery module control system and a battery module control method used for controlling a battery module composed of one or more battery cells.
- the battery deterioration level, capacity, etc. will differ depending on the usage history, so when reusing a battery module, it is necessary to obtain some data about the collected battery module. Has been proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2007-141464 discloses a secondary battery module including a battery information storage unit that stores at least one of its own electrical characteristic information and usage history information as battery information.
- a battery information management device to be connected the information processing means comprising at least a CPU and a memory, the output means for outputting the information processing result of the information processing means, and the secondary battery module as the information Interface means connected to the processing means, wherein the information processing means reads out battery information stored in the battery information storage means of the secondary battery module by the interface means, and separately determines the battery information in advance.
- the secondary battery module is based on the one or more threshold values and the read battery information.
- Grade information for reuse output the grade information obtained as a result of the grade classification to the output means, output the battery information read by the interface means, and output the battery information
- a battery information management device provided with a battery information database that stores information corresponding to the identification information of the secondary battery module. JP 2007-141464 A
- the device described in Patent Document 1 is provided with battery information storage means for storing battery information such as its own electrical characteristic information or usage history information in the secondary battery module, or the battery information storage means on the apparatus side. It is necessary to provide means for reading the battery information stored in the battery, and there is a problem that the configuration for reusing the secondary battery module becomes very complicated and expensive.
- the reusable secondary battery module is provided with battery information storage means in accordance with the standard as described above, and there is a problem that an arbitrary secondary battery module cannot be reused.
- a battery module control system includes a plurality of battery modules connected in parallel to each other, a switch circuit provided in a charge / discharge path of each of the plurality of battery modules, and the plurality of battery modules.
- the average impedance value calculating means for calculating the average impedance value of each of the battery modules, the allowable maximum charge / discharge rate input means for inputting the allowable maximum charge / discharge rate of each of the plurality of battery modules, and the average impedance value calculating means
- a permissible voltage difference calculating means for calculating a permissible voltage difference of each of the plurality of battery modules from the average impedance value that has been performed and a permissible maximum charge / discharge rate input by the permissible maximum charge / discharge rate input means;
- Common voltage detection means for detecting the voltage of a common charge / discharge path of battery modules
- a plurality of voltage detection means for detecting the voltage of each of the plurality of battery modules, the voltage detected by the common voltage detection means, and detected by the voltage detection means corresponding to a predetermined battery module When the difference from the voltage is larger than the allowable voltage difference of the predetermined battery module, control is performed to turn off the switch circuit provided in the charge / discharge path of the predetermined battery module.
- the battery module control system includes a plurality of battery modules connected in parallel to each other, a switch circuit provided in a charge / discharge path of each of the plurality of battery modules, and an average impedance of each of the plurality of battery modules.
- An average impedance value calculating means for calculating a value, an allowable maximum charge / discharge rate input means for inputting an allowable maximum charge / discharge rate of each of the plurality of battery modules, and a current flowing through a charge / discharge path of each of the plurality of battery modules is detected.
- a plurality of current detection means and when the absolute value of the current value detected by the current detection means corresponding to a predetermined battery module is larger than an allowable maximum charge / discharge rate of the predetermined battery module, Control to turn off the switch circuit provided in the charge / discharge path of a given battery module And performing.
- the battery module control system according to the present invention is characterized in that the production times of the plurality of battery modules are different.
- the battery module control system according to the present invention is characterized in that usage histories of the plurality of battery modules are different.
- the battery module control system according to the present invention is characterized in that the standards of the plurality of battery modules are different.
- the battery module control method detects the voltage of the common charge / discharge path of the plurality of battery modules connected in parallel by the common voltage detection means, By detecting a voltage of each of the plurality of battery modules by a plurality of voltage detection means, If the difference between the voltage detected by the common voltage detection means and the voltage detected by the voltage detection means corresponding to the predetermined battery module is larger than the allowable voltage difference of the predetermined battery module, the predetermined battery Control is performed to turn off a switch circuit provided in the charge / discharge path of the module.
- the battery module control method detects the current flowing through the charge / discharge paths of each of the plurality of battery modules connected in parallel by the plurality of current detection means, When the absolute value of the current value detected by the current detection unit corresponding to the predetermined battery module is larger than the allowable maximum charge / discharge rate of the predetermined battery module, the charge / discharge path of the predetermined battery module is provided. Control to turn off the switch circuit is performed.
- the allowable voltage difference of each secondary battery module is obtained through actual use or the like, and a voltage larger than this allowable voltage difference is applied to the secondary battery module.
- a switch circuit provided in the charge / discharge path of the secondary battery module so that the secondary battery module is not applied, it is ensured that the secondary battery module is used in a safe use area.
- the secondary battery module can be reused by a simple and inexpensive system without providing a storage means for storing the usage history or the like in the module itself.
- the safe use of any secondary battery module can be ensured by controlling the switch circuit based on the allowable voltage difference as described above. Even if the standard battery information storage means is not provided, any secondary battery module can be reused.
- FIG. 1 is a diagram showing an outline of a circuit configuration of a battery module control system according to an embodiment of the present invention.
- 1 is a battery module control system
- 10 is a control unit
- 11 is a CPU
- 12 is a RAM
- 13 is a ROM
- 14 is a timing unit
- 15 is an A / D conversion unit
- 16 is an interface unit
- 20 is for discharging.
- Switch circuit, 30 is a charge switch circuit
- 40 is a charge / discharge log data / module data table storage unit
- 50 is an input unit
- 61, 62, 63 are switch circuits
- 71, 72, 73, 74 are voltage detection terminals
- 81 , 82 and 83 are battery modules
- 91, 92 and 93 are current detectors, respectively.
- the battery module control system 1 receives a charge command / discharge command, a charge stop command / discharge stop command from a host device (not shown), charges the battery modules M 1 , M 2 , M 3 , It is a system that discharges from a module, stops charging, or stops discharging, and performs charge / discharge management of the battery modules M 1 , M 2 , and M 3 connected to the battery module control system 1.
- the number of battery modules managed by the battery module control system 1 according to the embodiment of the present invention is not limited to three as in the present embodiment, but one or more arbitrary number of battery modules can be managed. Is possible.
- the battery module control system 1 can manage a battery module configured by combining arbitrary types of secondary battery cells.
- the types and standards of the battery module M 1 , the battery module M 2 , and the battery module M 3 may be different.
- the battery module managed by the battery module control system 1 may be a used battery module that has already been used or may be a new battery module. More specifically, as the battery module managed by the battery module control system 1, even if the production time of each battery module is different, the usage history of each battery module is different, or the standard of each battery module is different. May be different.
- the allowable voltage differences between the battery modules M 1 , M 2 , and M 3 are acquired through actual use or the like. As voltage higher than the allowable voltage difference is not applied to each of the battery modules M 1, M 2, M 3, the switch circuits SW 1 provided in the charge and discharge path of the battery module M 1, M 2, M 3 , SW 2 and SW 3 are controlled to ensure that the battery module is used in a safe use area. For this reason, as mentioned above, even if the production times of the battery modules managed by the battery module control system 1 are different, the usage histories are different, or the standards are different. It doesn't matter. The definition of the allowable voltage difference will be described later.
- a current detection unit a 1, a 2, a 3 consisting, switch for controlling the battery module M 1, M 2, M 3 battery module M 1 is provided to the charge and discharge path, respectively, M 2, M 3 each charge and discharge
- a control unit 10 that monitors and controls charging / discharging of the circuits SW 1 , SW 2 , SW 3, and the battery modules M 1 , M 2 , M 3 , and charging / discharging of the entire battery modules M 1 , M 2 , M 3
- the discharge switch circuit 20 and the charge switch circuit 30 each comprising an FET to be controlled, the charge / discharge log data / module data table storage unit 40 for storing data relating to the battery modules M 1 , M 2 and M 3 , and the control unit 10 Predetermined information
- An input unit 50 used when the user or the like inputs, and a.
- the terminal voltage values V 1 , V 2 , V 3 , V com at the voltage detection terminals 71, 72, 73, 74, and the charge / discharge paths of the battery modules M 1 , M 2 , M 3 are used.
- An A / D conversion unit 15 is provided that converts the current values I 1 , I 2 , and I 3 in the current detection units 91, 92, and 93 into digital values that can be processed by a CPU (Central Processing Unit) 11 or the like.
- the terminal voltage value V com at 74 is a charge / discharge voltage value of the battery module control system 1 as a whole.
- the output from the A / D converter 15 is input to the CPU 11 as the control means, and calculation, comparison, determination, and the like are performed, and a discharge switch circuit including a switching transistor or the like by the signal from the CPU 11 20.
- a discharge switch circuit including a switching transistor or the like by the signal from the CPU 11 20.
- control unit 10 is provided with a memory for recording various data to be processed by the CPU 11.
- a RAM (Random Access Memory) 12 temporarily stores a part of the program and various data.
- a ROM (Read Only Memory) 13 which is a nonvolatile storage medium provided with a program memory for storing a program for controlling the operation of the battery module control system 1 stores data necessary for executing the program in advance. .
- control unit 10 is provided with a timer unit 14 which is various timers, and is used for time measurement and the like.
- the interface unit 16 in the control unit 10 controls input / output to / from the charge / discharge log data / module data table storage unit 40 and the input unit 50 which are components outside the control unit 10.
- the charge / discharge log data / module data table storage unit 40 is composed of a rewritable nonvolatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or FlashMemory, and is charged with the battery modules M 1 , M 2 , and M 3 .
- EEPROM Electrical Erasable Programmable ROM
- FlashMemory FlashMemory
- the input unit 50 is an input means such as a touch panel that allows the user to input data related to the battery modules M 1 , M 2 , and M 3 .
- FIG. 2 is a diagram for explaining the data structure of the charge / discharge log data / module data table storage unit 40 in the battery module control system according to the embodiment of the present invention.
- FIG. 2A shows the data structure of the charge / discharge log data.
- the charge / discharge log data data corresponding to the time data acquired by the timekeeping unit 14 regarding whether the battery module control system 1 is charging or discharging, battery modules M 1 , M 2 , M 3 Data of current values I 1 , I 2 , I 3 in current detectors 91, 92, 93 in each charge / discharge path, terminal voltage values V 1 , V 2 , at voltage detection terminals 71, 72, 73, 74, Data of V 3 and V com are recorded.
- FIG. 2B is a table relating to the characteristics of each of the battery modules M 1 , M 2 , and M 3 calculated from the above-described charge / discharge log data recorded so far.
- a value that can be safely used for any battery module is input as a value to be used in the module data table, and the battery module control system 1 is implemented.
- the log data can be acquired while being used, and the module data table can be updated appropriately.
- the battery capacity (Ah 1 , Ah 2 , Ah 3 ) is calculated and updated appropriately by the CPU 11 at the idle time or at the end of charge / discharge using a known method such as a current integration method or a voltage method based on the charge / discharge log data. It has become.
- a new battery module (not limited to new or used) is set in the battery module control system 1, it may be programmed to discharge from full charge as an initial setting and obtain the battery capacity.
- the battery capacity may be obtained from charge / discharge log data in normal actual use.
- the average value (Z 1 , Z 2 , Z 3 ) of the DC impedance is the DC internal resistance of the battery module obtained by cumulatively averaging the voltage values of the respective battery modules divided by the current values. .
- Such a DC impedance average value is also appropriately calculated and updated by the CPU 11 from the charge / discharge log data.
- the charge / discharge rate of 1C is a current value at which discharge is completed in 1 hour after constant-current discharge of a cell having a nominal capacity value.
- 1C is 2.5A.
- 0.2C is 0.5A.
- the charge / discharge rates (C 1 , C 2 , C 3 ) of the battery modules managed by the module data table are the charge / discharge rates (unit: amperes) of each of the battery modules M 1 , M 2 , M 3 .
- the permissible maximum charge / discharge rate defines how much C current a battery module can charge / discharge at maximum. For example, in a battery module having a nominal capacity value of 2.5 Ah, 1C is 2.5 A, but when the allowable maximum charging / discharging rate of this battery module is 2 C, the allowable maximum charging / discharging current is 5 A.
- the allowable maximum charge / discharge rates (Cmax 1 , Cmax 2 , Cmax 3 ) of the battery modules managed in the module data table are the maximum allowable charge / discharge rates of the battery modules M 1 , M 2 , M 3 as described above ( The unit is ampere).
- Such allowable maximum charge / discharge rates (Cmax 1 , Cmax 2 , Cmax 3 ) are preferably input by the user from the input unit 50 and set in a table. Alternatively, instead of such user input from the input unit 50, information may be automatically acquired because it is provided from a website on the Internet.
- the value of the charge / discharge rate in the module data table can be used as it is. This is because it is considered that any battery module can flow a current corresponding to at least 1C.
- the allowable voltage difference ( ⁇ V 1 , ⁇ V 2 , ⁇ V 3 ) of the battery module is a voltage value obtained by the product of the allowable maximum charge / discharge rate of the battery module and the DC impedance average value of the battery module.
- the voltage difference exceeding the allowable voltage difference defined in this way is not applied to the battery module, and the current exceeding the allowable maximum charge / discharge rate is If the two points of not flowing into the module are observed, the battery module can be used safely.
- the switch circuits SW 1 , SW 2 , SW 3 are controlled so that these two points are observed.
- the secondary battery module can be reused by a simple and inexpensive system without providing a storage means for storing the usage history etc. in the battery module itself, and whether it is used or new. Any battery module can be reused.
- FIG. 3 is a diagram showing a flowchart of the charge / discharge process of the battery module control system 1 according to the embodiment of the present invention.
- a discharge command or charge command
- the charge / discharge process is started in step S ⁇ b> 100.
- step S101 the discharging switch circuit 20 (the charging switch circuit 30 in the case of the charging command) is operated in the case of the discharging command.
- step S102 all the switch circuits SW 1 , SW 2 , SW 3 provided in the charge / discharge paths of the battery modules M 1 , M 2 , M 3 are turned on.
- the voltage values V 1 , V 2 , V 3 and V com at the voltage detection terminal, and the current values I 1 , I 2 and I 3 of the current detection units A 1 , A 2 and A 3 are detected. Get 3 .
- the acquired voltage values V 1 , V 2 , V 3 , V com and the current values I 1 , I 2 , I 3 are stored in the charge / discharge log data / module data table together with the timing data by the timing unit 14. Record in section 40.
- step S105 a SW on / off state change processing subroutine is executed. This subroutine will be described in detail later.
- step S106 the control unit 10 determines whether or not a charge stop command (or a discharge stop command) is input from a host device (not shown). When the determination result of step S106 is NO, the process returns to step S103 and loops.
- step S106 determines whether the decision result in the step S106 is YES. If the decision result in the step S106 is YES, the process proceeds to a step S107, and in the step S107, the discharging switch circuit 20 (or the charging switch circuit 30) is stopped.
- step S108 the battery module M 1, M 2, M 3 all provided the individual discharge paths of the switch circuits SW 1, SW 2, SW 3 turned OFF.
- step S109 the “battery” of each of the battery modules M 1 , M 2 , M 3 is determined based on the log (recorded in the charge / discharge log data / module data table storage unit 40) acquired by the current discharge (or charge). The value of “capacitance” and “DC impedance average value” are calculated.
- step S110 the value of the module data table recorded so far is compared with the value of the “battery capacity” calculated this time and the “DC impedance average value” and recorded so far. It is determined whether the module data table needs to be changed. When the determination in step S110 is YES, the process proceeds to step S111, and the module data table stored in the charge / discharge log data / module data table storage unit 40 is updated. When the determination is NO, the process proceeds to step S112 and the process is terminated. To do.
- FIG. 4 is a flowchart of the SW on / off state change processing subroutine of the battery module control system 1 according to the embodiment of the present invention.
- step S202 a switch state relating to whether SW n is ON or OFF is acquired, and in step S203, it is determined whether SW n is ON.
- step S203 determines whether SW n is ON.
- step S204 it is determined whether
- the determination in step S204 is YES, since a safe current not exceeding C maxn is flowing in the battery module, the process proceeds to step S205, and the ON state of SW n is maintained.
- the determination in step S204 is NO, since a current exceeding C maxn that cannot be secured is flowing in the battery module, the process proceeds to step S206, and SW n is changed from the ON state to the OFF state. To do.
- step S208 which is performed when it is determined in step S203 that SW n is in the OFF state, it is determined whether or not
- step S208 If the judgment is YES at the step S208, since it is assumed Komu current flows that can not be guaranteed safety beyond C maxn the battery module, the process proceeds to step S209, maintains the OFF state of the SW n.
- step S208 determines whether a safe current that does not exceed C maxn flows into the battery module, so control is performed so that SW n is changed from the OFF state to the ON state.
- step S207 it is determined whether or not all n have been completed. If the determination in this step is no, the process proceeds to step S211, n is incremented by 1, and the process proceeds to step S202. On the other hand, if the determination in step S207 is yes, the process proceeds to step S212 and returns to the original routine.
- the allowable voltage difference ⁇ V of each secondary battery module is obtained through actual use or the like, and a voltage larger than the allowable voltage difference ⁇ V is obtained from the secondary battery.
- the switch circuit SW n provided in the charging / discharging path of the secondary battery module so as not to be applied to the module (that is, to prevent a current exceeding C maxn from being able to ensure safety). Since the secondary battery module ensures that the secondary battery module is used in a safe use area, it is simple and inexpensive without providing a storage means for storing the usage history and the like in the secondary battery module itself. The system allows the secondary battery module to be reused.
- the safe use of an arbitrary secondary battery module can be ensured by controlling the switch circuit SW n based on the allowable voltage difference ⁇ V as described above. Even if the battery information storage means is not provided, any secondary battery module can be reused.
- the battery module control system includes: (1) a voltage detected by a voltage detection unit corresponding to a predetermined battery module is detected, and provided on a charge / discharge path of the predetermined battery module based on the detected voltage. And (2) detecting the current detected by the current detection means corresponding to the predetermined battery module, and providing the current to the charging / discharging path of the predetermined battery module based on this. In addition, two modes of on / off control of the switch circuit are included.
- FIG. 5 is a diagram showing an outline of processing steps in the battery module control system according to the embodiment of the present invention
- FIG. 5 (A) is a diagram showing an outline of steps until creation of a module data table
- B) is a diagram showing an outline of steps for referring to the module data table and controlling on / off of the switch circuit based on the detected voltage.
- step S11 average impedance values (Z 1 , Z 2 , Z 3 ) of the plurality of battery modules (M 1 , M 2 , M 3 ) are calculated.
- the average impedance value can be calculated by cumulatively averaging the voltage values of the respective battery modules (M 1 , M 2 , M 3 ) divided by the current value.
- step S12 inputs a plurality of battery modules (M 1, M 2, M 3) each allowable maximum charge and discharge rate (Cmax 1, Cmax 2, Cmax 3). Such input can be performed using the input unit 50.
- step S13 the average impedance value (Z 1 , Z 2 , Z 3 ) calculated in the average impedance value calculation step in step S11 and the allowable maximum charge / discharge rate input step in step S12 are input.
- the charge / discharge rate (Cmax 1 , Cmax 2 , Cmax 3 ) and the allowable voltage difference ( ⁇ V 1 , ⁇ V 2 , ⁇ V 3 ) for each of the plurality of battery modules (M 1 , M 2 , M 3 ) are calculated. Calculate the voltage difference.
- step S14 each value calculated or input as described above is stored in the module data table.
- FIG. 5B when charge / discharge control of a plurality of battery modules (M 1 , M 2 , M 3 ) is continuously performed, the process returns from the last process step to the first process step and loops. is there.
- step S21 the voltage (V com ) of the common charge / discharge path of the plurality of battery modules (M 1 , M 2 , M 3 ) is converted into the common voltage detecting means (74, control unit 10). ) To detect.
- step S22 the voltages (V 1 , V 2 , V 3 ) of the plurality of battery modules (M 1 , M 2 , M 3 ) are converted into a plurality of voltage detection means (71, 72, 73, control unit 10).
- the safe use of any secondary battery module can be ensured by controlling the switch circuit SW n using the allowable voltage difference ⁇ V as a determination criterion. Even if the storage means is not provided, any secondary battery module can be reused.
- FIG. 6 is a diagram showing an outline of processing steps in the battery module control system according to the embodiment of the present invention
- FIG. 6 (A) is a diagram showing an outline of steps until creation of a module data table.
- B) is a diagram showing an outline of steps for controlling on / off of the switch circuit based on the detected current with reference to the module data table.
- step S31 average impedance values (Z 1 , Z 2 , Z 3 ) of the plurality of battery modules (M 1 , M 2 , M 3 ) are calculated.
- the average impedance value can be calculated by cumulatively averaging the voltage values of the respective battery modules (M 1 , M 2 , M 3 ) divided by the current value.
- step S32 and inputs a plurality of battery modules (M 1, M 2, M 3) each allowable maximum charge and discharge rate (Cmax 1, Cmax 2, Cmax 3). Such input can be performed using the input unit 50.
- step S33 each value calculated or input as described above is stored in the module data table.
- FIG. 6B when charge / discharge control of a plurality of battery modules (M 1 , M 2 , M 3 ) is continuously performed, the process returns from the last process step to the first process step and loops. is there.
- step S41 the currents (I 1 , I 2 , I 3 ) flowing through the charge / discharge paths of the plurality of battery modules (M 1 , M 2 , M 3 ) are detected as a plurality of currents. Detect by means (91, 92, 93).
- the safe use of an arbitrary secondary battery module can be ensured by controlling the switch circuit SW n using the allowable maximum charge / discharge rate as a determination criterion. Even if the information storage means is not provided, any secondary battery module can be reused.
- the battery module control system and the battery module control method of the present invention it is possible to appropriately control the power flow flowing through the AC switch (120) constituting the uninterruptible power supply. 120), an electric power system can be constructed at low cost, and industrial applicability is very large.
Abstract
Description
複数の電圧検出手段によって、前記複数の電池モジュールそれぞれの電圧を検出し、
前記共通電圧検出手段によって検出された電圧と、所定の電池モジュールに対応する前記電圧検出手段によって検出された電圧との差が、前記所定の電池モジュールの許容電圧差より大きい場合、前記所定の電池モジュールの充放電路に設けられたスイッチ回路をオフする制御を行うことを特徴とする。
所定の電池モジュールに対応する前記電流検出手段によって検出された電流値の絶対値が、前記所定の電池モジュールの許容最大充放電レートより大きい場合、前記所定の電池モジュールの充放電路に設けられたスイッチ回路をオフする制御を行うことを特徴とする。
放電用スイッチ回路20、充電用スイッチ回路30、スイッチ回路SW1、SW2、SW3をオンオフ制御する。
ステップS23では、共通電圧検出手段によって検出された電圧(Vcom)と、所定の電池モジュールに対応する電圧検出手段によって検出された電圧(Vn;ただし、n=1,2,3のいずれか)との差が、前記所定の電池モジュールの許容電圧差(ΔVn;ただし、n=1,2,3のいずれか)より大きいかを判定する。
Claims (7)
- 互いに並列接続された複数の電池モジュールと、
前記複数の電池モジュールそれぞれの充放電路に設けられたスイッチ回路と、
前記複数の電池モジュールそれぞれの平均インピーダンス値を算出する平均インピーダンス値算出手段と、
前記複数の電池モジュールそれぞれの許容最大充放電レートを入力する許容最大充放電レート入力手段と、
前記平均インピーダンス値算出手段で算出された平均インピーダンス値と、前記許容最大充放電レート入力手段で入力された許容最大充放電レートと、から前記複数の電池モジュールそれぞれの許容電圧差を算出する許容電圧差算出手段と、
前記複数の電池モジュールの共通の充放電路の電圧を検出する共通電圧検出手段と、
前記複数の電池モジュールそれぞれの電圧を検出する複数の電圧検出手段と、を有し、
前記共通電圧検出手段によって検出された電圧と、所定の電池モジュールに対応する前記電圧検出手段によって検出された電圧との差が、前記所定の電池モジュールの許容電圧差より大きい場合、前記所定の電池モジュールの充放電路に設けられたスイッチ回路をオフする制御を行うことを特徴とする電池モジュール制御システム。 - 互いに並列接続された複数の電池モジュールと、
前記複数の電池モジュールそれぞれの充放電路に設けられたスイッチ回路と、
前記複数の電池モジュールそれぞれの平均インピーダンス値を算出する平均インピーダンス値算出手段と、
前記複数の電池モジュールそれぞれの許容最大充放電レートを入力する許容最大充放電レート入力手段と、
前記複数の電池モジュールそれぞれの充放電路を流れる電流を検出する複数の電流検出手段と、を有し、
所定の電池モジュールに対応する前記電流検出手段によって検出された電流値の絶対値が、前記所定の電池モジュールの許容最大充放電レートより大きい場合、前記所定の電池モジュールの充放電路に設けられたスイッチ回路をオフする制御を行うことを特徴とする電池モジュール制御システム。 - 前記複数の電池モジュールそれぞれの生産時期が異なることを特徴とする請求項1又は請求項2に記載の電池モジュール制御システム。
- 前記複数の電池モジュールそれぞれの利用履歴が異なることを特徴とする請求項1乃至請求項3のいずれかに記載の電池モジュール制御システム。
- 前記複数の電池モジュールそれぞれの規格が異なることを特徴とする請求項1乃至請求項4のいずれかに記載の電池モジュール制御システム。
- 共通電圧検出手段によって、並列接続された複数の電池モジュールの共通の充放電路の電圧を検出し、
複数の電圧検出手段によって、前記複数の電池モジュールそれぞれの電圧を検出し、
前記共通電圧検出手段によって検出された電圧と、所定の電池モジュールに対応する前記電圧検出手段によって検出された電圧との差が、前記所定の電池モジュールの許容電圧差より大きい場合、前記所定の電池モジュールの充放電路に設けられたスイッチ回路をオフする制御を行うことを特徴とする電池モジュール制御方法。 - 複数の電流検出手段によって、並列接続された複数の電池モジュールそれぞれの充放電路を流れる電流を検出し、
所定の電池モジュールに対応する前記電流検出手段によって検出された電流値の絶対値が、前記所定の電池モジュールの許容最大充放電レートより大きい場合、前記所定の電池モジュールの充放電路に設けられたスイッチ回路をオフする制御を行うことを特徴とする電池モジュール制御方法。
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