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WO2014034230A1 - Dispositif de surveillance d'un système de batterie - Google Patents

Dispositif de surveillance d'un système de batterie Download PDF

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Publication number
WO2014034230A1
WO2014034230A1 PCT/JP2013/066774 JP2013066774W WO2014034230A1 WO 2014034230 A1 WO2014034230 A1 WO 2014034230A1 JP 2013066774 W JP2013066774 W JP 2013066774W WO 2014034230 A1 WO2014034230 A1 WO 2014034230A1
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WO
WIPO (PCT)
Prior art keywords
communication
conversion circuit
circuit
communication conversion
control circuit
Prior art date
Application number
PCT/JP2013/066774
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English (en)
Japanese (ja)
Inventor
彰彦 工藤
睦 菊地
金井　友範
山内　辰美
明広 町田
Original Assignee
日立ビークルエナジー株式会社
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Publication of WO2014034230A1 publication Critical patent/WO2014034230A1/fr

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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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • 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
    • 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
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • 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
    • B60L2250/00—Driver interactions
    • B60L2250/10—Driver interactions by alarm
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • 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 an apparatus for monitoring a battery system.
  • an assembled battery configured by connecting a large number of single battery cells of a secondary battery in series is used to secure a desired high voltage.
  • an assembled battery has a monitoring IC for performing capacity calculation and protection management of each single battery cell for each predetermined number of single battery cells, and monitoring and controlling the charge / discharge state of each single battery cell. It is connected.
  • Patent Document 1 discloses a battery control system in which a main controller and each monitoring IC are connected in a daisy chain and signal communication is performed using this connection.
  • Patent Document 2 discloses a configuration in which each monitoring IC is connected via a capacitor, and the DC component of the communication signal is cut off by this capacitor, thereby eliminating the potential difference between the monitoring ICs.
  • JP 2005-318750 A Japanese Patent No. 458758
  • a communication conversion circuit using an IC or the like may be provided between a main controller using a microcomputer and a monitoring IC. In this way, after the communication signal from the main controller is converted into a communication signal with a small DC component by the communication conversion circuit, the converted communication signal is transmitted between the monitoring ICs. Transmission can be stabilized.
  • the communication conversion circuit as described above When the communication conversion circuit as described above is used, if the communication conversion circuit fails and the correct communication signal conversion operation is not performed, normal communication cannot be performed between the main controller and the monitoring IC, and the battery control system Lead to malfunctions. Therefore, it is important to reliably detect a failure in the communication conversion circuit.
  • a battery system monitoring device monitors a battery system including a plurality of cell groups in which a plurality of single battery cells are connected in series, and is provided for each cell group.
  • a battery monitoring / control integrated circuit for monitoring and controlling cells, a control circuit for inputting / outputting communication signals between the battery monitoring / control integrated circuit, and the control circuit and the battery monitoring / control integrated circuit
  • a communication conversion circuit for converting input / output communication signals.
  • the battery monitoring / control integrated circuits are connected to each other in accordance with a predetermined communication order, and the communication conversion circuit receives the communication signal output from the control circuit according to the first encoding method.
  • HEV hybrid vehicle
  • the present invention is not limited to the battery system used for HEVs, but is used for other vehicles such as plug-in hybrid vehicles (PHEV), electric vehicles (EV), railway vehicles, etc.
  • PHEV plug-in hybrid vehicles
  • EV electric vehicles
  • railway vehicles etc.
  • the present invention can be widely applied to various power storage devices used in applications.
  • a lithium-ion battery having an operating voltage in the range of about 3.0 to 4.2 V (average output voltage: 3.6 V) is used as a storage / discharge device that is the minimum unit of control in the battery system. It is assumed and explained. However, as long as it is a device that can store and discharge electricity, a battery system other than a lithium ion battery may be used.
  • the battery system monitoring device according to the present invention can be used to monitor and control the state of the battery system, and its use can be restricted when the SOC (State of Charge) is too high (overcharge) or too low (overdischarge). Anything is possible. In the following description, they are collectively referred to as a single battery or a single battery cell.
  • a plurality of (approximately several to a dozen) battery cells connected in series are called cell groups, and a plurality of cell groups are connected in series or in series-parallel. This is called a battery system.
  • the cell group and the battery system are collectively called an assembled battery.
  • FIG. 1 is a diagram showing a configuration of a battery system monitoring device according to a first embodiment of the present invention.
  • This battery system monitoring apparatus is connected to a battery system 10 constituted by connecting a plurality of lithium ion batteries 1 as single battery cells in series, and monitors the battery system 10.
  • the battery system monitoring apparatus shown in FIG. 1 includes monitoring ICs 21 and 22, insulating elements 31 and 32, a capacitor 4, a communication conversion circuit 5, and a control circuit 6.
  • the monitoring ICs 21 and 22 are provided for each cell group configured by connecting a plurality of lithium ion batteries 1 in series in the battery system 10, and monitor and control each lithium ion battery 1 of the corresponding cell group. For example, the voltage and temperature of each lithium ion battery 1 are measured, and the measurement result is transmitted to the control circuit 6. Further, balancing is performed for making the SOC uniform among the lithium ion batteries 1 in accordance with a command from the control circuit 6. In addition, various operations can be performed in the monitoring ICs 21 and 22 as necessary.
  • the monitoring IC 21 and the monitoring IC 22 each have a reception terminal Rx and a transmission terminal Tx.
  • the transmission terminal Tx of the monitoring IC 21 and the reception terminal Rx of the monitoring IC 22 are connected to each other via the capacitor 4.
  • this communication signal is input to the reception terminal Rx in the monitoring IC 22. That is, the monitoring IC 21 and the monitoring IC 22 are connected to each other according to a predetermined communication order, with the monitoring IC 21 as the upper level and the monitoring IC 22 as the lower level.
  • the communication conversion circuit 5 converts communication signals input / output between the monitoring ICs 21 and 22 and the control circuit 6, and includes a transmission terminal Tx, a reception terminal Rx, a selection signal input terminal CS, a clock terminal CLK, It has a data input terminal DIN and a data output terminal DOUT.
  • the transmission terminal Tx of the communication conversion circuit 5 is connected to the reception terminal Rx of the monitoring IC 21 via the insulating element 31, and the reception terminal Rx of the communication conversion circuit 5 is connected to the transmission terminal Tx of the monitoring IC 22 via the insulating element 32. It is connected to the.
  • the control circuit 6 is configured by using a microcomputer or the like, and performs predetermined processing for monitoring and controlling the battery system 10 based on communication signals input and output between the monitoring ICs 21 and 22, for example, The SOC estimation process of the lithium ion battery 1 is performed.
  • the control circuit 6 includes a selection signal output terminal SS, a clock terminal CLK, a data input terminal DIN, a data output terminal DOUT, a transmission signal capture terminal CTx, and a reception signal capture terminal CRx.
  • the control circuit 6 When communication is performed between the control circuit 6 and the monitoring ICs 21 and 22, the control circuit 6 outputs a predetermined selection signal from the selection signal output terminal SS to the selection signal input terminal CS of the communication conversion circuit 5.
  • a clock signal is output from the terminal CLK, and a communication signal (data signal) is output from the data output terminal DOUT.
  • data representing the content of commands to the monitoring ICs 21 and 22 is encoded according to a predetermined encoding method, for example, an NRZ (Non Return to Zero) encoding method.
  • a predetermined encoding method for example, an NRZ (Non Return to Zero) encoding method.
  • the encoding method used here is preferably suitable for synchronous communication. In the following description, this encoding method is referred to as a “first encoding method”.
  • the above clock signal and communication signal output from the control circuit 6 are input to the clock terminal CLK and the data input terminal DIN in the communication conversion circuit 5, respectively.
  • the communication conversion circuit 5 converts the input communication signal into a communication signal according to another encoding method.
  • the encoding method used here is suitable for asynchronous communication and can suppress an increase in the DC component of the communication signal even when the same code (0 or 1) continues. preferable.
  • Such an encoding method includes, for example, the Manchester encoding method. In the following description, this encoding method is referred to as a “second encoding method”.
  • the communication conversion circuit 5 converts the communication signal as described above, the communication conversion circuit 5 outputs the converted communication signal from the transmission terminal Tx. This communication signal is input to the reception terminal Rx of the monitoring IC 21 via the insulating element 31.
  • the monitoring IC 21 When the monitoring IC 21 receives the communication signal from the communication conversion circuit 5, the monitoring IC 21 decodes the content of the communication signal and performs processing according to instructions from the control circuit 6 such as measurement and balancing of the voltage and temperature of each lithium ion battery 1. Perform as necessary. Then, together with the obtained measurement result and the like, a communication signal is output from the transmission terminal Tx to the reception terminal Rx of the monitoring IC 22. Thereby, a communication signal is transmitted from the monitoring IC 21 to the monitoring IC 22 according to the communication order.
  • the monitoring IC 22 When the monitoring IC 22 receives the communication signal from the monitoring IC 21, the monitoring IC 22 decodes the contents of the communication signal and, like the monitoring IC 21, commands from the control circuit 6 such as measurement and balancing of the voltage and temperature of each lithium ion battery 1. The process according to is performed as needed. Then, together with the obtained measurement results and the like, a communication signal is output from the transmission terminal Tx to the reception terminal Rx of the communication conversion circuit 5 via the insulating element 32.
  • the communication conversion circuit 5 When receiving the communication signal from the monitoring IC 22, the communication conversion circuit 5 reconverts the communication signal in accordance with the original encoding method, that is, the first encoding method. Then, the converted communication signal is output from the data output terminal DOUT to the data input terminal DIN of the control circuit 6 in accordance with a command from the control circuit 6.
  • the battery system 10 is monitored by inputting / outputting communication signals between the control circuit 6 and the monitoring ICs 21 and 22.
  • the transmission signal capture terminal CTx of the control circuit 6 is connected between the transmission terminal Tx of the communication conversion circuit 5 and the reception terminal Rx of the monitoring IC 21.
  • the reception signal capture terminal CRx of the control circuit 6 is connected between the transmission terminal Tx of the monitoring IC 22 and the reception terminal Rx of the communication conversion circuit 5.
  • the control circuit 6 determines whether or not the communication conversion circuit 5 has correctly converted the communication signal as described below, and detects the failure of the communication conversion circuit 5. I do.
  • FIG. 2 is a flowchart of processing executed by the control circuit 6 when detecting a failure of the communication conversion circuit 5 in the present embodiment.
  • step S100 the control circuit 6 outputs transmission data to the communication conversion circuit 5.
  • the control circuit 6 outputs the transmission data encoded according to the first encoding method from the data output terminal DOUT to the data input terminal DIN of the communication conversion circuit 5 as a communication signal.
  • This transmission data may be set in advance for failure detection.
  • the selection signal is output from the selection signal output terminal SS and the clock signal is output from the clock terminal CLK.
  • step S110 the control circuit 6 observes the waveform input to the transmission signal capture terminal CTx, thereby observing the waveform of the communication signal output from the communication conversion circuit 5 to the monitoring IC 21 as the transmission waveform.
  • the communication signal whose waveform is observed here is obtained by converting the transmission data according to the first encoding method output from the control circuit 6 in step S100 by the communication conversion circuit 5 according to the second encoding method. Thereby, the observation waveform of the transmission data after the conversion by the communication conversion circuit 5 can be acquired.
  • step S120 the control circuit 6 observes the waveform input to the received signal capture terminal CRx, thereby observing the waveform of the communication signal output from the monitoring IC 22 to the communication conversion circuit 5 as the received waveform.
  • the communication signal whose waveform is observed here is received data output from the monitoring IC 22 by the second encoding method in accordance with the transmission data output from the control circuit 6 in step S100. This is before conversion according to the encoding method. Thereby, the observation waveform of the reception data before the conversion by the communication conversion circuit 5 can be acquired.
  • step S130 the control circuit 6 acquires the reception data output from the communication conversion circuit 5.
  • the communication conversion circuit 5 converts the communication signal output from the monitoring IC 22 according to the original first encoding method, and converts the converted communication signal from the data output terminal DOUT to the control circuit 6.
  • the received data is output to the data input terminal DIN.
  • the reception data may include transmission data output from the control circuit 6 in step S100.
  • predetermined information related to the monitoring ICs 21 and 22, for example, information indicating the measurement result of voltage or temperature may be added.
  • step S140 the control circuit 6 determines the transmission data after conversion by the communication conversion circuit 5 and the reception data before conversion by the communication conversion circuit 5 based on the transmission waveform and reception waveform observed in steps S110 and S120, respectively. Determine.
  • the transmission waveform that is, the position and width of the pulse in the observation waveform in step S110
  • the second conversion method used when the communication conversion circuit 5 converts the communication signal is taken into consideration, and the post-conversion Determine the transmission data.
  • received data before conversion is determined based on the received waveform, that is, the position and width of the pulse in the observed waveform in step S120.
  • step S150 the control circuit 6 compares the transmission data and the reception data before and after conversion by the communication conversion circuit 5, using the transmission data after conversion determined in step S140 and the reception data before conversion. That is, the transmission data before conversion output in step S100 is compared with the transmission data after conversion determined in step S140, and it is determined whether these contents are the same. Further, the converted reception data acquired in step S130 is compared with the reception data before conversion determined in step S140, and it is determined whether or not the contents are the same.
  • step S160 the control circuit 6 determines whether the transmission data and the reception data match before and after conversion based on the comparison result in step S150. If both the transmission data and the reception data match before and after the conversion, the process proceeds to step S170. If at least one of the transmission data and the reception data does not match before and after the conversion, the process proceeds to step S180.
  • step S170 the control circuit 6 determines that the communication conversion circuit 5 is normal without failure. If step S170 is performed, the process of the flowchart shown in FIG. 2 will be complete
  • step S180 the control circuit 6 determines that the communication conversion circuit 5 has failed. In this case, it is preferable to notify the user of the failure, for example, by turning on a warning lamp or outputting a warning sound. If step S180 is performed, the process of the flowchart shown in FIG. 2 will be complete
  • control circuit 2 is not necessarily executed at all times in the control circuit 6, but is executed at a predetermined timing, for example, when the system is started or stopped, or when a preset execution condition is satisfied. You may do it. In this way, it is possible to prevent the processing load of the control circuit 6 from becoming excessive for waveform observation.
  • step S120 only one of the transmission waveform and the reception waveform may be observed, and failure detection of the communication conversion circuit 5 may be performed based on the observation result.
  • step S120 is omitted, and in step S140, only the transmission data after conversion based on the transmission waveform is determined, and the determination of reception data before conversion based on the reception waveform is omitted. can do.
  • step S150 only the transmission data before and after conversion are compared, and the determination in step S160 can be made based on the comparison result. In this case, it is not necessary to provide the reception signal capture terminal CRx in the control circuit 6.
  • step S110 when only the received waveform is observed, the process of step S110 is omitted, and in step S140, only received data before conversion based on the received waveform is determined, and transmission data after conversion based on the transmitted waveform is determined. Can be omitted.
  • step S150 only the received data before and after conversion are compared, and the determination in step S160 can be made based on the comparison result.
  • the transmission signal capture terminal CTx may not be provided in the control circuit 6. That is, the control circuit 6 can observe at least one of the transmission waveform and the reception waveform and detect a failure of the communication conversion circuit 5 based on the observed waveform.
  • the battery system monitoring device is provided for each cell group of the battery system 10 and communicates between the monitoring ICs 21 and 22 that monitor and control each single battery cell of the corresponding cell group, and the monitoring ICs 21 and 22. And a communication conversion circuit 5 that converts communication signals input and output between the control circuit 6 and the monitoring ICs 21 and 22.
  • the monitoring ICs 21 and 22 are connected to each other according to a predetermined communication order.
  • the communication conversion circuit 5 converts the communication signal output from the control circuit 6 according to the first encoding method into a communication signal according to a second encoding method different from the first encoding method, The communication signal is output to the highest-level monitoring IC 21 in the communication order.
  • the monitoring ICs 21 and 22 transmit communication signals according to the second encoding method in accordance with the communication order.
  • the communication conversion circuit 5 converts the communication signal output from the lowest monitoring IC 22 in the communication order according to the second encoding method into a communication signal according to the first encoding method, and converts the converted communication signal to Output to the control circuit 6.
  • the control circuit 6 detects a failure of the communication conversion circuit 5 based on this communication signal. Specifically, at least one of a transmission waveform that is a waveform of a communication signal output from the communication conversion circuit 5 to the monitoring IC 21 and a reception waveform that is a waveform of the communication signal output from the monitoring IC 22 to the communication conversion circuit 5 is provided. One is observed (steps S110 and S120), and a failure of the communication conversion circuit 5 is detected based on the observed waveform (step S180). Since it did in this way, the failure of the communication conversion circuit 5 can be detected reliably.
  • step S110 the control circuit 6 determines the converted transmission data represented by the communication signal based on the transmission waveform, and when the reception waveform is observed at step S120. Based on the received waveform, received data before conversion represented by the communication signal is determined (step S140). In step S180, a failure of the communication conversion circuit 5 is detected based on at least one of these data. That is, the control circuit 6 outputs predetermined transmission data to the communication conversion circuit 5 as a communication signal (step S100). This transmission data is compared with the transmission data after conversion determined in step S140 (step S150), and if they do not match, it is determined that the communication conversion circuit 5 is out of order (steps S160 and S180).
  • the control circuit 6 receives predetermined reception data from the communication conversion circuit 5 as a communication signal (step S130).
  • the received data before conversion determined in step S140 is compared with the received data (step S150), and if they do not match, it is determined that the communication conversion circuit 5 has failed (steps S160 and S180). Since it did in this way, it can be judged correctly whether the communication conversion circuit 5 is out of order based on the observation result of a transmission waveform or a reception waveform.
  • the control circuit 6 can execute the waveform observation in step S110 or step S120 at a predetermined timing such as when the system is started or stopped. In this way, it is possible to prevent the processing load of the control circuit 6 from becoming excessive.
  • FIG. 3 is a diagram showing a configuration of a battery system monitoring apparatus according to the second embodiment of the present invention.
  • This battery system monitoring device is provided with two communication conversion circuits 51 and 52 and a changeover switch 7 for switching between them, as compared with the battery system monitoring device according to the first embodiment shown in FIG. Is different. Another difference is that the transmission circuit capture terminal CTx and the reception signal capture terminal CRx are not provided in the control circuit 6.
  • the control circuit 6 selects either the communication conversion circuit 51 or 52 as the output destination of the communication signal.
  • the control circuit 6 controls the changeover switch 7 to switch to the communication conversion circuit 51 side.
  • the selection signal is output from the selection signal output terminal SS1 to the selection signal input terminal CS of the communication conversion circuit 51
  • the clock signal is output from the clock terminal CLK
  • the communication signal is output from the data output terminal DOUT.
  • the communication signal is encoded in accordance with the first encoding method with data representing the contents of commands to the monitoring ICs 21 and 22.
  • the communication conversion circuit 51 converts the input communication signal in accordance with the second encoding format in the same manner as the communication conversion circuit 5 described in the first embodiment. To do. Then, the converted communication signal is output from the transmission terminal Tx.
  • this communication signal is input to the reception terminal Rx of the monitoring IC 21 via the changeover switch 7 and the insulating element 31, the monitoring ICs 21 and 22 perform the same operation as in the first embodiment, respectively, and the transmission terminal Tx of the monitoring IC 22 A communication signal is output from. This communication signal is input to the receiving terminals Rx of the communication conversion circuits 51 and 52 via the insulating element 32, respectively.
  • the communication conversion circuits 51 and 52 reconvert the communication signals in accordance with the original first encoding method, similarly to the communication conversion circuit 5 described in the first embodiment. . Then, according to the selection signal output from the selection signal output terminal SS1 or SS2 of the control circuit 6, the converted communication signal is output from the data output terminal DOUT to the data input terminal DIN of the control circuit 6, respectively.
  • the control circuit 6 controls the changeover switch 7 to switch to the communication conversion circuit 52 side.
  • the selection signal is output from the selection signal output terminal SS2 to the selection signal input terminal CS of the communication conversion circuit 52
  • the clock signal is output from the clock terminal CLK
  • the communication signal is output from the data output terminal DOUT.
  • the communication conversion circuit 52 converts the input communication signal in accordance with the second encoding format, and outputs the converted communication signal from the transmission terminal Tx, similarly to the communication conversion circuit 51. The subsequent operation is the same as when the communication conversion circuit 51 is selected.
  • the control circuit 6 receives the communication signals output from the communication conversion circuits 51 and 52 as described above, and monitors the battery system 10 based on the received data represented by these communication signals. Further, by comparing the received data from the communication conversion circuit 51 and the received data from the communication conversion circuit 52, it is determined whether or not the communication signal conversion by the communication conversion circuit 51 or 52 is correctly performed, and the communication Failure detection of the conversion circuits 51 and 52 is performed.
  • FIG. 4 is a flowchart of processing executed by the control circuit 6 when performing failure detection of the communication conversion circuits 51 and 52 in the present embodiment.
  • step S200 the control circuit 6 selects either the communication conversion circuit 51 or 52. Then, the switching state of the changeover switch 7 is controlled so that the selected communication conversion circuit 51 or 52 and the monitoring IC 21 are connected to each other via the changeover switch 7 and the insulating element 31.
  • step S210 the control circuit 6 outputs transmission data to the communication conversion circuit 51 or 52 selected in step S200.
  • the control circuit 6 outputs the transmission data encoded according to the first encoding method from the data output terminal DOUT to the data input terminal DIN of the communication conversion circuit 51 or 52 as a communication signal.
  • This transmission data may be set in advance for failure detection. Further, at this time, a selection signal is output from the selection signal output terminal SS1 or SS2, and a clock signal is output from the clock terminal CLK.
  • step S220 the control circuit 6 acquires the reception data output from the communication conversion circuits 51 and 52, respectively.
  • the control circuit 6 first outputs a selection signal from the selection signal output terminal SS1 or SS2 to the communication conversion circuit 51 or 52 selected in step S200, whereby reception data is output from the communication conversion circuit. So that Upon receiving this selection signal, the communication conversion circuit 51 or 52 converts the communication signal output from the monitoring IC 22 according to the original first encoding method as described above, and converts the converted communication signal to the data output terminal.
  • the received data is output from DOUT to the data input terminal DIN of the control circuit 6.
  • the selection signal is output from the selection signal output terminal SS1 or SS2 to the communication conversion circuit 51 or 52 different from the one that has previously output the selection signal.
  • the communication conversion circuit 51 or 52 converts the communication signal output from the monitoring IC 22 in accordance with the original first encoding method, as in the other communication conversion circuit, and the converted communication signal. Is output from the data output terminal DOUT to the data input terminal DIN of the control circuit 6 as received data. In this way, the reception data output from the communication conversion circuit 51 and the reception data output from the communication conversion circuit 52 are acquired.
  • these received data may include the transmission data output from the control circuit 6 in step S210, as in the first embodiment.
  • predetermined information related to the monitoring ICs 21 and 22, for example, information indicating the measurement result of voltage or temperature may be added. The order of outputting the selection signals may be reversed from the above.
  • step S230 the control circuit 6 determines whether there is a communication abnormality.
  • the reception data from the communication conversion circuits 51 and 52 is obvious, such as when no reception data is output from the communication conversion circuits 51 and 52, or when these reception data are fixed to a fixed value and do not change. If an abnormality is recognized, it is determined that there is a communication abnormality, and the process proceeds to step S280. On the other hand, when such an abnormality is not recognized in the received data, it is determined that there is no communication abnormality and the process proceeds to step S240.
  • step S240 the control circuit 6 compares the received data acquired in step S220. That is, the converted reception data represented by the communication signal output from the communication conversion circuit 51 is compared with the reception data after conversion represented by the communication signal output from the communication conversion circuit 52. And it is judged whether these contents are the same.
  • step S250 the control circuit 6 determines whether or not the received data from the communication conversion circuit 51 matches the received data from the communication conversion circuit 52 based on the comparison result in step S240. If these received data match, the process proceeds to step S260, and if they do not match, the process proceeds to step S270.
  • step S260 the control circuit 6 determines that the communication conversion circuits 51 and 52 are both normal and not faulty. If step S260 is performed, the process of the flowchart shown in FIG. 4 will be complete
  • step S270 the control circuit 6 determines that one of the communication conversion circuits 51 or 52 has failed. In this case, it is preferable to notify the user of the failure, for example, by turning on a warning lamp or outputting a warning sound, as in step S170 of FIG. If step S270 is performed, the process of the flowchart shown in FIG. 4 will be complete
  • step S280 the control circuit 6 switches the communication conversion circuit that outputs the communication signal.
  • the control circuit 6 selects a different one of the communication conversion circuits 51 or 52 from the one selected in step S200 by controlling the switching state of the selector switch 7. Then, the communication conversion circuit and the monitoring IC 21 are connected to each other via the changeover switch 7 and the insulating element 31.
  • step S290 the control circuit 6 outputs transmission data to the communication conversion circuit newly selected by switching in step S280 of the communication conversion circuits 51 or 52 by the same method as in step S210.
  • step S300 the control circuit 6 acquires the reception data output from the communication conversion circuits 51 and 52 in the same manner as in step S220.
  • step S310 the control circuit 6 determines whether or not there is a communication abnormality by the same method as in step S230. If it is determined that there is a communication abnormality, the process proceeds to step S270 described above. If it is determined that there is no communication abnormality, the process proceeds to step S320.
  • step S320 as in step S240, the control circuit 6 compares the received data acquired in step S300 and determines whether or not the contents are the same.
  • step S330 the control circuit 6 determines whether or not the received data from the communication conversion circuit 51 matches the received data from the communication conversion circuit 52 based on the comparison result in step S320. If these received data match, the process proceeds to step S340, and if they do not match, the process proceeds to step S270 described above.
  • step S340 the control circuit 6 determines that the communication conversion circuit selected first in step S200 out of the communication conversion circuits 51 or 52 has failed. Then, the communication conversion circuit 51 or 52 determined to be out of order is excluded from the subsequent selection targets, and is not used in future monitoring operations of the battery system 10. That is, when step S340 is executed, it is considered that the communication conversion function on the transmission side is broken in the communication conversion circuit 51 or 52 selected first. Therefore, by excluding the communication conversion circuit that is in failure from the subsequent selection targets, the monitoring of the battery system 10 can be continued using the normal communication conversion circuit 51 or 52. In this case as well, it is preferable to notify the user of the failure as in step S270. If step S340 is performed, the process of the flowchart shown in FIG. 4 will be complete
  • failure detection of the communication conversion circuits 51 and 52 can be performed.
  • processing as described in FIG. 4 is different from the processing in FIG. 2 described in the first embodiment, and does not require processing for waveform observation in the control circuit 6. Therefore, even if it is always executed during the monitoring operation of the battery system 10, there is little possibility that the processing load of the control circuit 6 becomes excessive. In this case as well, similar to the first embodiment, it may be executed at a predetermined timing such as when the system is started.
  • the communication conversion circuits 51 and 52 convert the communication signals output from the lowest-order monitoring IC 22 in the communication order according to the second encoding method into communication signals according to the first encoding method, and convert the communication signals.
  • the subsequent communication signals are output to the control circuit 6 respectively.
  • the control circuit 6 detects a failure of the communication conversion circuits 51 and 52 based on these communication signals. Specifically, either one of the communication conversion circuits 51 and 52 is selected (step S200), the converted reception data represented by the communication signal input from the communication conversion circuit 51, and the communication conversion circuit 52 input.
  • the converted reception data represented by the communication signal is compared (step S240). Based on the comparison result, a failure of the communication conversion circuits 51 and 52 is detected (step S270). Since it did in this way, the failure of the communication conversion circuits 51 and 52 can be detected reliably.
  • the control circuit 6 receives the converted reception data represented by the communication signal input from the communication conversion circuit 51 and the converted reception represented by the communication signal input from the communication conversion circuit 52 in the comparison result of step S240. If the data does not match, it is determined that either one of the communication conversion circuits 51 or 52 has failed (steps S250 and S270). Since it did in this way, when either one of the communication conversion circuits 51 or 52 has failed, the failure can be determined easily.
  • control circuit 6 excludes the communication conversion circuit from the selection target (steps S230 and S280). ⁇ S340). Since it did in this way, monitoring of the battery system 10 can be continued also when the communication conversion function of the transmission side has failed in either one of the communication conversion circuits 51 or 52.
  • FIG. 5 is a diagram showing a configuration of a battery system monitoring apparatus according to the third embodiment of the present invention.
  • This battery system monitoring apparatus is a combination of the characteristics of the battery system monitoring apparatus according to the first embodiment shown in FIG. 1 and the characteristics of the battery system monitoring apparatus according to the second embodiment shown in FIG. . That is, it has two communication conversion circuits 51 and 52 and a changeover switch 7 for switching between them, and the control circuit 6 is provided with a transmission signal capture terminal CTx and a reception signal capture terminal CRx.
  • the control circuit 6 selects either one of the communication conversion circuits 51 and 52 as the output destination of the communication signal and outputs the communication signal. Then, by receiving the communication signals output from the communication conversion circuits 51 and 52, the battery system 10 is monitored based on the reception data represented by these communication signals. Further, by comparing the received data from the communication conversion circuit 51 and the received data from the communication conversion circuit 52, it is determined whether or not the communication signal conversion by the communication conversion circuit 51 or 52 is correctly performed, and the communication Failure detection of the conversion circuits 51 and 52 is performed. As a result, if it is determined that either one of the communication conversion circuits 51 or 52 has failed, the communication conversion circuit 51 and the communication conversion are performed by performing the same waveform observation as described in the first embodiment. It is specified which of the circuits 52 has failed.
  • FIG. 6 is a flowchart of processing executed by the control circuit 6 when failure detection of the communication conversion circuits 51 and 52 is performed in the present embodiment.
  • step S400 to S420 the control circuit 6 performs processes similar to those in steps S200 to S220 in FIG.
  • step S430 the control circuit 6 determines whether or not there is a communication abnormality as in step S230 of FIG. As a result, if it is determined that there is a communication abnormality, the process proceeds to step S470, and if it is determined that there is no communication abnormality, the process proceeds to step S440.
  • step S440 the control circuit 6 compares the received data acquired in step S420. That is, the converted reception data represented by the communication signal output from the communication conversion circuit 51 is compared with the reception data after conversion represented by the communication signal output from the communication conversion circuit 52. And it is judged whether these contents are the same.
  • step S450 the control circuit 6 determines whether or not the received data from the communication conversion circuit 51 matches the received data from the communication conversion circuit 52 based on the comparison result in step S440. If these received data match, the process proceeds to step S460, and if they do not match, the process proceeds to step S470.
  • step S460 the control circuit 6 determines that the communication conversion circuits 51 and 52 are both normal and are not faulty. If step S460 is performed, the process of the flowchart shown in FIG. 6 will be complete
  • steps S470 to S520 the control circuit 6 performs the same processing as in steps S100 to S150 of FIG. 2 on the communication conversion circuit 51 or 52 selected in step S400. That is, transmission data is output to the selected communication conversion circuit 51 or 52, and the transmission waveform input to the transmission signal capture terminal CTx and the reception waveform input to the reception signal capture terminal CRx at that time are observed. . From this observed waveform, the transmission data after conversion and the reception data before conversion are discriminated, and based on these, the transmission data and the reception data are compared before and after conversion by the communication conversion circuit 51 or 52, respectively.
  • step S530 the control circuit 6 determines whether the transmission data and the reception data match before and after the conversion based on the comparison result in step S520. If both the transmission data and the reception data match before and after conversion, the process proceeds to step S540. If at least one of the transmission data and the reception data does not match before and after conversion, the process proceeds to step S550.
  • step S540 the control circuit 6 switches the communication conversion circuit that outputs the communication signal, similarly to step S280 in FIG. At this time, the control circuit 6 selects the communication conversion circuit 51 or 52 that is different from the one selected in step S400 by controlling the switching state of the selector switch 7. Then, the communication conversion circuit and the monitoring IC 21 are connected to each other via the changeover switch 7 and the insulating element 31.
  • step S540 is executed, the process returns to step S470, and the above-described processing is repeated for the communication conversion circuit newly selected by switching in step S540.
  • the communication conversion circuit 51 or 52 determines that at least one of transmission data and reception data does not match before and after conversion.
  • step S550 the control circuit 6 determines that the communication conversion circuit selected in step S400 or step S540 executed most recently among the communication conversion circuits 51 or 52 has failed. Then, the communication conversion circuit 51 or 52 determined to be out of order is excluded from the subsequent selection targets, and is not used in future monitoring operations of the battery system 10. That is, by determining that at least one of the transmission data or the reception data does not match before and after the conversion for the communication conversion circuit 51 or 52 by the processing of the above-described steps S520 and S530, the communication conversion circuit fails. Can be identified. Therefore, by excluding the communication conversion circuit that is in failure from the subsequent selection targets, the monitoring of the battery system 10 can be continued using the normal communication conversion circuit 51 or 52. In this case as well, it is preferable to notify the user of the failure as in steps S270 and S340 of FIG. When step S550 is executed, the processing of the flowchart shown in FIG.
  • failure detection of the communication conversion circuits 51 and 52 can be performed.
  • the communication conversion circuits 51 and 52 convert the communication signals output from the lowest-order monitoring IC 22 in the communication order according to the second encoding method into communication signals according to the first encoding method, and convert the communication signals.
  • the subsequent communication signals are output to the control circuit 6 respectively.
  • the control circuit 6 detects a failure of the communication conversion circuits 51 and 52 based on these communication signals. Specifically, either one of the communication conversion circuits 51 or 52 is selected (step S400), and the received data after conversion represented by the communication signal input from the communication conversion circuit 51 and the communication conversion circuit 52 are input. It is determined whether or not the converted reception data represented by the communication signal matches (steps S440 and S450).
  • step S480 and S490 the transmission waveform and the reception waveform when the communication conversion circuit 51 or 52 is selected are observed. Then, the transmission data after conversion based on the observation waveform when the communication conversion circuit 51 is selected and / or the reception data before conversion, and the transmission data after conversion based on the observation waveform when the communication conversion circuit 52 is selected and / or Alternatively, based on at least one of the received data before conversion, it is determined which of the communication conversion circuit 51 and the communication conversion circuit 52 is out of order (step S550). Since it did in this way, the failure of the communication conversion circuits 51 and 52 can be detected reliably.
  • the control circuit 6 excludes the communication conversion circuit 51 or the communication conversion circuit 52 that is determined to have a failure in step S550 from the selection targets. Since it did in this way, monitoring of the battery system 10 can be continued also when either one of the communication conversion circuits 51 or 52 is out of order.
  • monitoring ICs 21 and 22 are connected to the battery system 10 and a communication signal is transmitted between these monitoring ICs 21 and 22 has been described.
  • the number of is not limited to this. Any number of monitoring ICs can be used depending on the number of cell groups in the battery system 10.
  • a communication signal input / output between the control circuit 6 and the conversion ICs 21 and 22 via the communication conversion circuit 5 or the communication conversion circuits 51 and 52 may be of a differential type in order to make it strong against noise.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

Un circuit convertisseur de communication (5) convertit un signal de communication émis par un circuit de commande (6) et correspondant à un premier système de codage en un signal de communication correspondant à un second système de codage qui est différent du premier système de codage, et adresse le signal de communication converti à un appareil de surveillance (IC21). Les appareils de surveillance (IC21, IC22) transmettent le signal de communication correspondant au second système de codage dans l'ordre de la communication. Le circuit convertisseur de communication (5) convertit le signal de communication émis par l'appareil de surveillance (IC22) et correspondant au second système de codage en un signal de communication correspondant au premier système de codage et adresse le signal de communication converti au circuit de commande (6). Le circuit de commande (6) observe la forme d'onde du signal de commande adressé par l'appareil de commande (IC22) au circuit convertisseur de communication (5) et détecte la défaillance du circuit convertisseur de communication (5) sur la base de la longueur d'onde observée. La configuration ci-dessus permet de détecter fiablement la défaillance du circuit convertisseur de communication.
PCT/JP2013/066774 2012-08-29 2013-06-19 Dispositif de surveillance d'un système de batterie WO2014034230A1 (fr)

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KR101878405B1 (ko) * 2014-04-14 2018-07-16 엘에스산전 주식회사 점검 기능을 가지는 에너지 저장 장치
JP6819233B2 (ja) * 2016-11-17 2021-01-27 株式会社オートネットワーク技術研究所 車両用のバッテリ監視システム
JP7184691B2 (ja) * 2019-03-28 2022-12-06 ラピスセミコンダクタ株式会社 監視装置及び電池監視システム

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Publication number Priority date Publication date Assignee Title
JP2011061927A (ja) * 2009-09-08 2011-03-24 Hitachi Ltd 電池制御装置および電力装置
JP2011182558A (ja) * 2010-03-01 2011-09-15 Pues Corp 組電池

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011061927A (ja) * 2009-09-08 2011-03-24 Hitachi Ltd 電池制御装置および電力装置
JP2011182558A (ja) * 2010-03-01 2011-09-15 Pues Corp 組電池

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