WO2017072951A1 - 電池制御装置および電池システム - Google Patents
電池制御装置および電池システム Download PDFInfo
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- WO2017072951A1 WO2017072951A1 PCT/JP2015/080729 JP2015080729W WO2017072951A1 WO 2017072951 A1 WO2017072951 A1 WO 2017072951A1 JP 2015080729 W JP2015080729 W JP 2015080729W WO 2017072951 A1 WO2017072951 A1 WO 2017072951A1
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- battery
- communication line
- information
- control device
- communication
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
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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
Definitions
- Embodiments described herein relate generally to a battery control device and a battery system.
- a battery control device that manages a plurality of batteries and transmits the state of the battery to an external device is known.
- the conventional battery control device since it is connected to a plurality of batteries via one communication channel, the number of connectable batteries is limited due to the influence of attenuation of a signal transmitted to the battery.
- the battery may not be arranged flexibly.
- the problem to be solved by the present invention is to provide a battery control device and a battery system that can more flexibly arrange batteries.
- the battery control device of the embodiment includes a counting unit, a series information setting unit, and an information transmission unit.
- the counting unit counts, for each communication line, the number of battery modules connected to a communication line that is connected to a plurality of battery modules to form a communication channel.
- the series information setting unit sets a series of information for the battery modules connected to the plurality of communication lines as information for identifying the battery modules, based on the number of battery modules counted by the counting unit.
- the information transmission unit transmits management information in which the state information of each battery module is associated with each of the series of information set by the series information setting unit to the external device.
- the flowchart which shows an example of the flow of a process of the battery control part 110 in 1st Embodiment.
- FIG. 1 is a diagram illustrating a configuration example of the battery system 200 according to the first embodiment.
- the battery system 200 in the present embodiment may include, for example, a plurality of battery modules MDL1-1 to MDLm-nm and the battery control device 100, but is not limited thereto.
- the plurality of battery modules MDL1-1 to MDLm-nm and the battery control device 100 are connected via a first communication line DC and a second communication line BS that form a communication channel (indicated by ch in the figure). Good.
- the communication channel is formed by connecting the battery control device 100 and part or all of the battery modules MDL1-1 to MDLm-nm through the first communication line DC and the second communication line BS.
- a group of communication groups hereinafter, when the battery module is not distinguished from other battery modules, it is simply expressed as a battery module MDL.
- the battery control device 100 communicates with the control device 310.
- the control device 310 determines the charge / discharge amount of the battery system 200 based on the management information transmitted by the battery control device 100, and issues a charge / discharge power command including this charge / discharge amount to the battery control device 100. Send.
- the first communication line DC connects, for example, a plurality of battery modules MDL and the battery control device 100 in an annular daisy chain shape.
- the first communication line DC includes an output side line for outputting a signal and an input side line for inputting a signal.
- the second communication line BS connects a plurality of battery modules MDL to the battery control apparatus 100 as an internal bus.
- the second communication line BS is, for example, a CAN cable, and a terminal resistor (or a device corresponding thereto) is connected to one end of the second communication line BS, for example.
- the plurality of battery modules MDL are connected by a power line (not shown).
- the power line may be formed in a different form from the first communication line DC and the second communication line BS described above, and the battery modules MDL constituting one communication channel may be connected in series or connected in parallel. May be.
- battery modules MDL over a plurality of communication channels may be connected in series with one power line.
- the configuration of the communication channel (each communication line) and the connection configuration on the power line can be arbitrarily determined independently.
- a signal transmitted to the second communication line BS functioning as an internal bus undergoes distance attenuation or the like according to the length of the communication line. Therefore, an effective length is provided for the length of the second communication line BS. It is done. Further, when communication is performed based on the CAN protocol, there is a limit on the number of communication nodes related to the arbitration process. For this reason, the number of battery modules MDL that can be connected to one communication channel is limited. In the present embodiment, the maximum number of battery modules MDL that can be connected to one communication channel is described as n.
- the number of communication channels in the battery control device 100 is also limited.
- the maximum number of communication channels in the battery control device 100 will be described as m.
- FIG. 2 is a diagram illustrating an example of the use of the battery system 200 of the first embodiment.
- the battery system 200 is used by being connected to a PCS (Power Conditioning System) 400 via the battery terminal board 300, for example, and constitutes the power system 1.
- the PCS 400 is connected to the system power 500 and the load 600, for example.
- Each of the plurality of battery systems 200-1 to 200-j includes, for example, the plurality of battery modules MDL and the battery control device 100 described above.
- the battery control device 100 causes the battery module MDL to charge and discharge in units of this battery system.
- the battery terminal board 300 may include a control device 310 and a circuit breaker 320, but is not limited thereto.
- the control device 310 may include a processor such as a CPU (Central Processing Unit).
- the control device 310 monitors the state of the circuit breaker 320, transmits information received from the PCS 400 to the battery control device 100 of each battery system, and transmits information received from the battery control device 100 to the PCS 400. Further, the control device 310 controls the circuit breaker 320 based on the information received from the battery control device 100, and makes the battery system 200 side and the PCS 400 side conductive or electrically cuts off.
- the control device 310 is an example of an external device.
- the circuit breaker 320 blocks power discharged from each battery system 200 or power supplied to each battery system 200 for charging in a power line circuit network.
- the circuit breaker 320 may function as a disconnector (service disconnect) or a fuse, for example.
- the circuit breaker 320 may be included in each of the battery systems 200-1 to 200-j. In this case, each battery control apparatus 100 may control the circuit breaker 320 provided in the same battery system 200, and may switch charge or discharge by the battery module MDL.
- the PCS 400 includes a processor such as a CPU, a communication interface for bidirectional communication with the control device 310, and the like.
- the PCS 400 converts DC power discharged from the battery system 200 into AC power and boosts the voltage of the converted AC power based on the control signal transmitted from the control device 310.
- the PCS 400 converts AC power supplied from the system power 500 and voltage-converted by the transformer T into DC power, and steps down to a voltage that can be charged by the battery module MDL.
- the battery system 200 is not limited to the application example described above, and can be used as, for example, a battery system mounted on a moving body such as a railway vehicle, an automobile, a ship, or an aircraft.
- FIG. 3 is a diagram illustrating an example of the configuration of the battery control device 100 according to the first embodiment.
- the battery control device 100 according to the present embodiment includes a connection switch SW-1 to SW-m to which a first communication line DC and a second communication line BS that form a plurality of communication channels are connected, a battery control unit 110,
- the storage unit 130 may be included, but is not limited thereto.
- connection switch SW when a connection switch is not distinguished from other connection switches, it is simply expressed as a connection switch SW.
- connection switches SW may be connected to a power cable for supplying power, a ground line, and the like together with the first communication line DC and the second communication line BS described above.
- Each of the connection switches SW detects that one or both of the first communication line DC and the second communication line BS are connected.
- connection switch SW has a voltage at a detection point to which a predetermined voltage is applied in advance in response to the connection of a ground line that forms a cable together with the first communication line DC and the second communication line BS. By detecting a drop to near 0 V, it is detected that the first communication line DC and the second communication line BS are connected to the battery control device 100. In this case, the connection switch SW outputs an ON signal (0V voltage signal) to the battery control unit 110 when the first communication line DC and the second communication line BS are connected to the battery control device 100.
- connection switch SW the state in which the ON signal is output by the connection switch SW, that is, the state in which the first communication line DC and the second communication line BS are connected is referred to as “ON state”, and the ON signal is not output by the connection switch SW. That is, a state where the first communication line DC and the second communication line BS are not connected will be referred to as an “off state”.
- the connection switch SW is not a switch that detects that the voltage at the detection point has dropped from a predetermined voltage to about 0 V as described above, but a switch that detects that the voltage at the detection point has increased to a predetermined voltage. Also good.
- the battery control unit 110 may include, for example, a module number counting unit (counting unit) 112, a series information setting unit 114, an abnormality determination unit 116, and an information transmission unit 118, but is not limited thereto.
- Some or all of the functional units of the battery control unit 110 may be realized by a processor such as a CPU executing a program stored in the storage unit 130.
- the program may be downloaded from an application server via a network, or a program stored in a portable storage medium such as an SD card may be installed in the battery control device 100.
- some or all of the functional units of the battery control unit 110 may be realized by hardware such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), and FPGA (Field-Programmable Gate Array). .
- the storage unit 130 includes, for example, a non-volatile storage medium such as a ROM (Read Only Memory), a flash memory, an HDD (Hard Disk Drive), an SD card, and a volatile storage medium such as a RAM (Random Access Memory) and a register. And may be realized.
- the storage unit 130 stores a program executed by the processor and stores a processing result by the battery control unit 110.
- the module number counting unit 112 When the connection switch SW is in the on state, the module number counting unit 112 includes the battery module MDL connected to the first communication line DC (or the second communication line BS) that forms a communication channel corresponding to the connection switch SW. Count the number. For example, the module number counting unit 112 determines whether or not the connection switch SW is turned on for each first communication line DC (communication channel), and when the connection switch SW is turned on from the off state, the number of battery modules MDL is determined. Is transmitted to the first communication line DC and a response signal to the confirmation signal is received to count the number of battery modules MDL.
- the series information setting unit 114 Based on the number of battery modules MDL counted by the module number counting unit 112, the series information setting unit 114 identifies a series of information for the battery modules MDL connected to the plurality of first communication lines DC, and identifies the battery module MDL. This information is set for each battery module MDL.
- the series of information is, for example, information represented by consecutive numbers (1, 2, 3,%) Or alphabets (A, B, C,...), And may be information that can be processed by the control device 310. Any form may be used. In this embodiment, a series of information is described as a decimal serial number.
- the abnormality determination unit 116 When the confirmation signal is transmitted from the module count unit 112, the abnormality determination unit 116 has an abnormality in the battery module MDL for each first communication line DC depending on whether or not a response signal to the confirmation signal is received. It is determined whether or not. For example, the abnormality determination unit 116 is connected to the first communication line DC to which the confirmation signal is transmitted when the response signal is not received or when the response signal including contents other than the contents assumed in advance is received. It is determined that an abnormality has occurred in the battery module MDL. In addition, when receiving a normal response signal, the abnormality determination unit 116 determines that there is no abnormality in the battery module MDL connected to the first communication line DC to which the confirmation signal is transmitted.
- the abnormality determination unit 116 determines that an abnormality has occurred in the battery module MDL, and receives a signal (hereinafter referred to as a failure signal) indicating that there is a failure from the battery module MDL via the second communication line BS. If it is, it is determined that a failure has occurred in some of the internal functions of the battery module MDL.
- the abnormality determination unit 116 determines that an abnormality has occurred in the battery module MDL and has not received a failure signal from the battery module MDL via the second communication line BS. It is determined that a failure has occurred.
- the information transmission unit 118 transmits, to the control device 310, management information in which the state information of the battery module MDL is associated with each of the series of information set by the series information setting unit 114.
- the management information may be associated with each of the series of information, the SOC (State Of Charge) of each battery module MDL, the determination result by the abnormality determination unit 116, and other state information.
- FIG. 4 is a diagram illustrating an example of the configuration of the battery module MDL according to the first embodiment.
- the battery module MDL may include, for example, a plurality of secondary batteries 10-1 to 10-k and the module control unit 20, but is not limited thereto.
- the plurality of secondary batteries 10-1 to 10-k are connected in series by a power line EL.
- the plurality of secondary batteries 10-1 to 10-k are, for example, lithium ion batteries, lead storage batteries, sodium sulfur batteries, redox flow batteries, nickel metal hydride batteries, and the like.
- lithium titanate may be used as a negative electrode material.
- each of the plurality of secondary batteries 10-1 to 10-k may be an assembled battery in which a plurality of battery cells are connected in parallel or in series.
- the module control unit 20 charges / discharges each of the plurality of secondary batteries 10-1 to 10-k under the control of the battery control device 100 that has received the charge / discharge power command, for example. At this time, if any of the secondary batteries 10-1 to 10-k cannot be charged / discharged, the module control unit 20 transmits a failure signal to the battery control device 100 via the second communication line BS. Note that the module control unit 20 may perform discharge under the control of the battery control device 100 even when the charge / discharge power command is not sent to the battery control device 100. Further, the module control unit 20 may perform this charge / discharge control without receiving control from the battery control device 100.
- the module control unit 20 When the module control unit 20 receives the confirmation signal from the battery control device 100 via the first communication line DC, for example, the module control unit 20 rewrites a predetermined variable in the confirmation signal to a value incremented by 1, and confirms that the variable is rewritten.
- the signal is transmitted via the first communication line DC to the battery module MDL that is electrically adjacent to its own battery module MDL.
- a predetermined variable is rewritten by the battery module MDL1-1 in the confirmation signal transmitted by the battery control device 100.
- the confirmation signal with this variable rewritten is transmitted from the battery module MDL1-1 to the battery module MDL1-2.
- the variable of the confirmation signal is incremented by one each time a signal is transmitted to the battery module MDL in the subsequent stage as viewed from the battery control device 100.
- the battery module MDL1-n1 at the last stage rewrites the confirmation signal variable to a value incremented by 1, and transmits this confirmation signal to the battery control apparatus 100 as a response signal.
- the battery control apparatus 100 determines the number of the battery modules MDL connected to the first communication line DC by confirming the variable of the confirmation signal received as the response signal.
- the module control unit 20 decrements a predetermined variable in the confirmation signal (for example, a value set to be equal to or greater than the maximum value n of the battery module MDL for each communication channel) by 1 instead of incrementing by 1. 100 may be notified of the number of battery modules MDL.
- FIG. 5 is a flowchart illustrating an example of a process flow of the battery control unit 110 according to the first embodiment. The process of this flowchart is started when the battery system 200 starts, for example.
- the module count unit 112 sets the internal parameter i to 1 (step S100). Next, the module count unit 112 determines whether or not the connection switch SWi corresponding to the i-th communication channel chi is in an on state (step S102).
- the module number counting unit 112 transmits a confirmation signal to the battery module MDLi-1 via the output side line of the first communication line DC-i that forms the communication channel chi (Step S1). S104).
- the module number counting unit 112 receives a confirmation signal (response signal) in which the variable is rewritten from the battery module MDLi-ni (for example, MDL1-n1) at the last stage via the input side line of the first communication line DC-i. Is determined (step S106).
- the module number counting unit 112 When receiving the response signal, the module number counting unit 112 refers to the value of the variable included in the response signal and counts the number of battery modules MDL connected to the first communication line DC-1 forming the communication channel ch1. (Determine) (step S108).
- the module count unit 112 increments the internal parameter i by 1 (step S110), and determines whether the internal parameter i exceeds the maximum number m of communication channels of the battery control device 100 (step S112). ).
- the module number counting unit 112 repeats the processing from step S102 to step S110 described above until the value of the communication channel number reaches the maximum number m of communication channels.
- the series information setting unit 114 is counted by the module count counting unit 112. Based on the number of battery modules MDL, a serial number for the battery modules MDL connected to the plurality of first communication lines DC is set for each battery module MDL as information for identifying the battery modules MDL (step S114).
- the information transmission unit 118 associates state information including information such as the SOC of each battery module MDL and the presence / absence of a failure with the serial number set by the serial information setting unit 114, and the associated information Is sent to the control device 310 as one piece of management information (step S116), and the processing of this flowchart ends.
- step S106 The description of the case where a negative determination is obtained in step S106 will be described later, and the setting of the serial number will be described first.
- 6, 7, and 9 are diagrams illustrating an example of a result of setting the serial number in the battery module MDL by the serial information setting unit 114 according to the first embodiment.
- FIG. 8 is a figure which shows an example of the result as which the serial number was set to the battery module MDL by the prior art.
- the maximum number m of communication channels included in the battery control device 100 is four.
- the example shown in FIG. 6 shows a usage situation in which 10 battery modules MDL are evenly connected to each of the first communication lines DC forming the communication channels ch1 to ch4.
- the series information setting unit 114 sets a value from 1 to 10 in a serial number for the battery module MDL of the communication channel ch1 first selected by the module number counting unit 112.
- the series information setting unit 114 continues the number set for the battery module MDL of the communication channel ch1 with respect to the battery module MDL of the communication channel ch2 selected by the module number counting unit 112.
- the values of 11 to 20 are set by serial numbers.
- the series information setting unit 114 sets a series number from the continuation of the number set for the battery module MDL of the communication channel ch2 for the battery module MDL of the communication channel ch3, and for the battery module MDL of the communication channel ch4.
- a serial number is set from the continuation of the number set in the battery module MDL of the communication channel ch3.
- ten battery modules MDL are connected to the first communication line DC-1 of the communication channel ch1, and nine battery modules MDL are connected to the first communication line DC-2 of the communication channel ch2.
- the state of use in which the battery module MDL is not connected to the first communication lines DC-3 and DC-4 of the connected communication channels ch3 and ch4 is shown.
- the series information setting unit 114 is connected to the ten battery modules MDL connected to the first communication line DC-1 of the communication channel ch1 and the first communication line DC-2 of the communication channel ch2.
- Serial numbers are set for the nine battery modules MDL.
- the series information setting unit 114 does not set a series number for the first communication lines DC-3 and DC-4 to which the battery module MDL is not connected.
- the first communication line DC-1 of the communication channel ch1 has six
- the first communication line DC-2 of the communication channel ch2 has seven
- the maximum number of battery modules MDL that can be connected to the first communication line DC-1 regardless of the number of battery modules MDL connected to the first communication line DC-1 of the communication channel ch1.
- a serial number of several minutes (in this case, 10) is set.
- the serial number set in the seven battery modules MDL connected to the first communication line DC-2 of the communication channel ch2 is not a continuation of the serial number set in the battery module MDL of the actual communication channel ch1, It is set from a continuation of numbers 7 to 10 that are not necessary.
- unnecessary serial numbers such as 7 to 10 and state information associated with these serial numbers are included in the management information and notified to the control device 310.
- serial numbers 18 to 20, 24 to 30, and 34 to 40 are set for the communication channels ch2 to ch4, and status information corresponding to these serial numbers is included in the management information.
- the control device 310 As a result, in the prior art, the amount of information communicated to the control device 310 increases, and the processing load on the control device 310 side tends to increase.
- the module number counting unit 112 sets the first communication line DC. By counting the number of connected battery modules MDL, serial numbers can be set for the battery modules MDL connected to all the first communication lines DC.
- FIG. 9 As in FIG. 8, there are six on the first communication line DC-1 of the communication channel ch1, seven on the first communication line DC-2 of the communication channel ch2, and the first communication line of the communication channel ch3.
- a use situation in which three battery modules MDL are connected to each of DC-3 and first communication line DC-4 of communication channel ch4 is shown.
- the information transmission unit 118 in the present embodiment corresponds to an originally unnecessary number as shown in FIG.
- the status information that has been made is not included in the management information.
- the battery control device 100 can reduce the amount of communication with the control device 310 and can reduce the processing load on the control device 310 side.
- the description returns to the flowchart of FIG.
- the abnormality determination unit 116 determines whether or not a failure signal is received from the battery module MDL via the second communication line BS. (Step S118).
- the abnormality determination unit 116 determines that, for example, the module control unit 20 is normal and any of the secondary batteries 10-1 to 10-k is abnormal, and the battery module MDL is determined. It is determined that a failure has occurred in some of the internal functions (step S120).
- the abnormality determination unit 116 determines, for example, that both the module control unit 20 and the secondary batteries 10-1 to 10-k are abnormal, and the entire battery module MDL has a failure. It is determined that it has occurred (step S122).
- the information transmission unit 118 notifies the control device 310 of information indicating a result determined that a failure has occurred in some or all of the battery modules MDL (step S124).
- the control device 310 controls the circuit breaker 320 to block the current flowing through the battery module MDL and stop the battery system 200. Thereby, the process of this flowchart is complete
- the module number counting unit 112 that counts the number of battery modules MDL for each first communication line DC, and the battery that is counted by the module number counting unit 112.
- a series of information setting unit 114 that sets a series of information for the battery modules MDL connected to the plurality of first communication lines DC as information for identifying the battery modules MDL, and a series of information setting units 114
- the information transmission unit 118 that transmits the management information in which the state information of the battery module MDL is associated with each of the series of information set by the control unit 310, so that the communication channel ch can be freely set. Even when it is set, an increase in communication load can be suppressed. For this reason, the user can flexibly determine the arrangement of the battery modules MDL, such as serial, parallel, or multiple-parallel, without worrying about the performance degradation of the apparatus. That is, the battery control device 100 can make the battery arrangement more flexible.
- the battery control apparatus 100 of 1st Embodiment since a series of information is set only to the battery module MDL actually connected to the 1st communication line DC, the communication amount with the control apparatus 310 is reduced. It is possible to reduce the processing load on the control device 310 side.
- the battery control device 100 of the first embodiment whether or not the battery module MDL is out of order based on a signal received from the battery module MDL via the first communication line DC and the second communication line BS. Therefore, the state of the battery module MDL can be monitored more accurately.
- the battery control apparatus 100 of 2nd Embodiment is demonstrated.
- the battery control apparatus 100 of the second embodiment is different from the first embodiment in that the battery system 200 does not start when the battery module MDL is not connected to the first communication line DC of the specified communication channel ch. To do. Therefore, it demonstrates centering on the difference and the description about a common part is abbreviate
- FIG. 10 is a diagram illustrating an example of the configuration of the battery control device 100A according to the second embodiment.
- the prescribed communication channel ch is set to the communication channel ch1
- the battery control device 100A is not provided with the connection switch SW corresponding to the communication channel ch1.
- the module number counting unit 112 first transmits a confirmation signal to the first communication line DC-1 of the prescribed communication channel ch1.
- the module count unit 112 sends a response signal via the first communication line DC-1. Since the information cannot be received, the information transmission unit 118 notifies the control device 310 of a signal to stop the activation of the battery system 200.
- the control device 310 immediately controls the circuit breaker 320, interrupts the current flowing through the battery module MDL, and stops the battery system 200.
- the battery control device 100A in the second embodiment can monitor the state of the battery module MDL more accurately, as in the first embodiment described above.
- FIG. 11 is a flowchart illustrating an example of a process flow of the battery control unit 110A in the second embodiment. The process of this flowchart is started when the battery system 200 starts, for example.
- the module count unit 112 sets the internal parameter i to 1 (step S200). Next, the module count unit 112 determines whether or not the internal parameter i is 1 (step S201). When the internal parameter i is 1, the module count unit 112 skips the determination process in step S202. On the other hand, when the internal parameter i is not 1, the module number counting unit 112 determines whether or not the connection switch SWi corresponding to the i-th communication channel chi is on (step S202).
- the module count unit 112 transmits a confirmation signal to the battery module MDLi-1 via the output side line of the first communication line DC-1 that forms the communication channel chi (Step S1). S204).
- the module count unit 112 receives the confirmation signal (response signal) in which the variable is rewritten from the battery module MDL (for example, MDL1-n1) at the last stage via the input side line of the first communication line DC-i. It is determined whether or not (step S206).
- the module number counting unit 112 refers to the value of the variable included in the response signal, and counts (determines) the number of battery modules MDL connected to the first communication line DC-1. S208).
- the module count unit 112 increments the internal parameter i by 1 (step S210), and determines whether the internal parameter i exceeds the maximum number m of communication channels (step S212).
- the module count unit 112 repeats the processing from step S202 to step S210 described above until the value of the communication channel number reaches the maximum number m of communication channels.
- the series information setting unit 114 sets the number of battery modules MDL counted by the module number counting unit 112. Based on this, a serial number is set for each battery module MDL (step S214).
- the information transmission unit 118 associates the status information of each battery module MDL with the series number set by the series information setting unit 114, and sends the associated information to the control device 310 as one piece of management information. Notification is made (step S216), and the processing of this flowchart is terminated.
- the abnormality determination unit 116 determines whether or not a failure signal is received from the battery module MDL via the second communication line BS (step S218). When the failure signal is received, the abnormality determination unit 116 determines that a failure has occurred in some of the internal functions of the battery module MDL, for example (step S220). On the other hand, when the failure signal is not received, the abnormality determination unit 116 determines that a failure has occurred in the entire battery module MDL, for example (step S222).
- the information transmission unit 118 notifies the control device 310 of information indicating the result of determining that a failure has occurred in some or all of the battery modules MDL (step S224).
- the control device 310 controls the circuit breaker 320 to block the current flowing through the battery module MDL and stop the battery system 200. Thereby, the process of this flowchart is complete
- the number of battery modules MDL is counted for each first communication line DC, and the number of battery modules MDL counted by the module number counting unit 112 is counted.
- the series information setting unit 114 that sets a series of information for the battery modules MDL connected to the plurality of first communication lines DC as information for identifying the battery modules MDL, and a series set by the series information setting unit 114
- the information transmission unit 118 that transmits the management information in which the state information of the battery module MDL is associated with each of the information to the control device 310, so that the power line EL can be freely connected to the plurality of battery modules MDL. It can be wired.
- the battery control apparatus 100 according to the first embodiment can arrange the batteries more flexibly so that the battery modules MDL are electrically connected in series, parallel, or multiple-parallel.
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Abstract
Description
図1は、第1の実施形態の電池システム200の構成例を示す図である。本実施形態における電池システム200は、例えば、複数の電池モジュールMDL1-1からMDLm-nmと、電池制御装置100とを含んでよいが、これに限定されない。複数の電池モジュールMDL1-1からMDLm-nmと、電池制御装置100とは、通信チャネル(図中、chで示す)を形成する第1通信線DCおよび第2通信線BSを介して接続されてよい。ここで通信チャネルとは、電池制御装置100と、電池モジュールMDL1-1からMDLm-nmのうち一部または全部とが、第1通信線DCおよび第2通信線BSによって接続されて形成される、一群の通信グループである。以下、電池モジュールを他の電池モジュールと区別しないときは、単に電池モジュールMDLと表記する。
以下、第2の実施形態の電池制御装置100について説明する。第2の実施形態の電池制御装置100では、規定の通信チャネルchの第1通信線DCに電池モジュールMDLが接続されていない場合に、電池システム200が起動しない点で第1の実施形態と相違する。従って、係る相違点を中心に説明し、共通する部分についての説明は省略する。
Claims (6)
- 複数の電池モジュールが接続されて通信チャネルを形成する通信線に接続された電池モジュールの数を、前記通信線ごとに計数する計数部と、
前記計数部によって計数された電池モジュールの数に基づいて、前記複数の通信線に接続された電池モジュールに対する一連の情報を、前記電池モジュールを識別する情報として設定する一連情報設定部と、
前記一連情報設定部によって設定された一連の情報のそれぞれに対し、各電池モジュールの状態情報が対応付けられた管理情報を、外部装置に送信する情報送信部と、
を備える電池制御装置。 - 前記情報送信部は、複数の前記通信チャネルが形成されている場合、複数の前記通信チャネルに対応した情報を、一つの管理情報として前記外部装置に送信する、
請求項1に記載の電池制御装置。 - 前記通信チャネルに対応して設けられ、前記通信線が接続されるとオン信号を出力する接続スイッチを更に備え、
前記計数部は、前記オン信号を出力した前記接続スイッチに対応する前記通信線に接続された電池モジュールの数を、前記オン信号を出力した前記接続スイッチに対応する前記通信線ごとに計数する、
請求項1に記載の電池制御装置。 - 前記複数の電池モジュールは、前記通信線によって直列に接続され、
前記計数部は、前記通信線を介して所定の信号を、前記通信線に接続された前記電池モジュールに送信し、前記所定の信号を送信するのに応じて、前記通信線に接続された前記電池モジュールから前記通信線を介して受信した信号の内容を解析することで、前記通信線に接続された複数の電池モジュールの数を、前記通信線ごとに計数する、
請求項1に記載の電池制御装置。 - 前記計数部により送信された所定の信号に対応した信号の受信の有無に応じて、前記通信線に接続された複数の電池モジュールに異常が生じているか否かを判定する異常判定部をさらに備える、
請求項4に記載の電池制御装置。 - 請求項1に記載の電池制御装置と、
前記電池制御装置と前記通信線によって直列に接続され、前記電池制御装置から前記通信線を介して所定の信号を受信すると、前記所定の信号に含まれる情報を増加または減少させて次の前記電池モジュールまたは前記電池制御装置に送信する複数の前記電池モジュールと、
を備える電池システム。
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PCT/JP2015/080729 WO2017072951A1 (ja) | 2015-10-30 | 2015-10-30 | 電池制御装置および電池システム |
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