Integrated Circuit For Controlling Battery Cell and Vehicle Power Supply System
First Claim
1. A vehicle power supply system, comprising:
- a battery module that is constituted with a plurality of serially connected battery cell groups each include a plurality of serially connected battery cells;
a plurality of battery cell control devices each disposed in correspondence to the plurality of battery cell groups; and
a signal transmission path through which signals that are input to or output from the plurality of battery cell control devices are transmitted, wherein;
each of the plurality of battery cell control devices comprises;
a voltage measurement circuit that measures terminal voltages at the individual battery cells in the corresponding battery cell group;
an abnormality diagnosis circuit that diagnoses an abnormality in the battery cell control device;
a timing control circuit that outputs a signal for instructing measurement phase during which the terminal voltage is measured, and, in synchronization with output of the measurement phase instruction signal, outputs a signal for instructing diagnosis phase during which diagnosis is executed by the abnormality diagnosis circuit; and
a communication circuit that outputs a signal indicating the terminal voltage measured by the voltage measurement circuit and a signal based upon a diagnosis result by the abnormality diagnosis circuit, to the signal transmission path, and wherein;
the abnormality diagnosis circuit diagnoses an abnormality in the battery cell control device in synchronization with the terminal voltage measurement based upon the diagnosis phase instruction signal.
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Accused Products
Abstract
A vehicle power supply system comprises a battery module that includes a plurality of battery cells, battery cell control devices and a signal transmission path through which signals are transmitted. The battery cell control device comprises a voltage measurement circuit that measures terminal voltages at the battery cells, an abnormality diagnosis circuit that diagnoses an abnormality in the battery cell control device, a timing control circuit that outputs a signal for instructing measurement phase and a signal for instructing diagnosis phase, and a communication circuit that outputs a signal indicating the terminal voltage and a signal based upon a diagnosis result by the abnormality diagnosis circuit.
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Citations
30 Claims
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1. A vehicle power supply system, comprising:
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a battery module that is constituted with a plurality of serially connected battery cell groups each include a plurality of serially connected battery cells; a plurality of battery cell control devices each disposed in correspondence to the plurality of battery cell groups; and a signal transmission path through which signals that are input to or output from the plurality of battery cell control devices are transmitted, wherein; each of the plurality of battery cell control devices comprises; a voltage measurement circuit that measures terminal voltages at the individual battery cells in the corresponding battery cell group; an abnormality diagnosis circuit that diagnoses an abnormality in the battery cell control device; a timing control circuit that outputs a signal for instructing measurement phase during which the terminal voltage is measured, and, in synchronization with output of the measurement phase instruction signal, outputs a signal for instructing diagnosis phase during which diagnosis is executed by the abnormality diagnosis circuit; and a communication circuit that outputs a signal indicating the terminal voltage measured by the voltage measurement circuit and a signal based upon a diagnosis result by the abnormality diagnosis circuit, to the signal transmission path, and wherein; the abnormality diagnosis circuit diagnoses an abnormality in the battery cell control device in synchronization with the terminal voltage measurement based upon the diagnosis phase instruction signal. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle power supply system, comprising:
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a battery module that is constituted with a plurality of serially connected battery cell groups each include a plurality of serially connected battery cells; a plurality of battery cell control devices each disposed in correspondence to the plurality of battery cell groups; and a signal transmission path through which signals that are input to or output from the plurality of battery cell control devices are transmitted, wherein; each of the plurality of battery cell control devices comprises; a voltage measurement circuit that measures terminal voltages at the individual battery cells in the corresponding battery cell group; a comparator circuit that compares a terminal voltage value output from the voltage measurement circuit with a voltage threshold value used for diagnosis of over-charge/over-discharge of the battery cells; a diagnosis result output circuit that outputs a signal indicating diagnosis result corresponding to the over-charge/over-discharge if a diagnosis result based upon a comparison result by the comparator circuit indicates the over-charge/over-discharge; a comparison value generating circuit that generates a comparison value which is used for an abnormality diagnosis in the battery cell control device and which is in a known magnitude relationship to a predetermined input value that is input to the comparator circuit; and a communication circuit that outputs a signal indicating the terminal voltage measured by the voltage measurement circuit and an abnormality signal based upon the diagnosis result signal to the signal transmission path, and wherein; each of the plurality of battery cell control devices compares an input value that is input to the comparator circuit with the comparison value via the comparator circuit, and, if the comparison result is different from the known magnitude relationship, judges that an abnormality has occurred in the battery cell control device and outputs the diagnosis result signal corresponding to the abnormality in the battery cell control device from the diagnosis result output circuit. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A vehicle power supply system comprising:
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a battery module that is constituted with a plurality of serially connected battery cell groups each include a plurality of serially connected battery cells; a plurality of battery cell control devices each disposed in correspondence to the plurality of battery cell groups; and a signal transmission path through which signals that are input to or output from the plurality of battery cell control devices are transmitted, wherein; each of the plurality of battery cell control devices comprises; a voltage measurement circuit that measures terminal voltages at the individual battery cells in the corresponding battery cell group; a comparator circuit that compares a terminal voltage value output from the voltage measurement circuit with a voltage threshold value used for diagnosis of over-charge/over-discharge of the battery cells; a diagnosis result output circuit that outputs a diagnosis result signal corresponding to the over-charge/over-discharge if a diagnosis result based upon a comparison result by the comparator circuit indicates the over-charge/over-discharge; a comparison value generating circuit that generates a comparison value which is used for an abnormality diagnosis in the battery cell control device and which is in a known magnitude relationship to a predetermined input value that is input to the comparator circuit; a communication circuit that outputs a signal indicating the terminal voltage measured by the voltage measurement circuit and an abnormality signal based upon the diagnosis result signal to the signal transmission path; and a timing control circuit that outputs a signal for instructing measurement phase during which the terminal voltage is measured, and, in synchronization with output of the measurement phase instruction signal, outputs a signal for instructing diagnosis phase during which an abnormality diagnosis is executed in the battery cell control device, and wherein; each of the plurality of battery cell control devices executes a first diagnosis for diagnosing an abnormality in the battery cell control device in synchronization with the terminal voltage measurement based upon the diagnosis phase instruction signal and a second diagnosis for diagnosing an abnormality in the battery cell control device based upon whether or not a comparison result of an input value that is input to the comparator circuit with the comparison value via the comparator circuit is different from the known magnitude relationship, and, if there is an abnormality in the battery cell control device, outputs the diagnosis result signal corresponding to the abnormality in the battery cell control device from the diagnosis result output circuit and outputs the abnormality signal based upon the output diagnosis result signal from the communication circuit to the signal transmission path. - View Dependent Claims (15, 16, 17, 18)
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19. A vehicle power supply system, comprising:
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a lithium battery module that is constituted with a plurality of serially connected lithium battery groups each include a plurality of serially connected lithium battery cells; a plurality of integrated circuits each disposed in correspondence to the plurality of lithium battery groups; and a signal transmission path through which signals that are input to or output from the plurality of integrated circuits are transmitted, wherein; each of the plurality of integrated circuits comprises; a selection circuit that selects a terminal voltage of measurement target from terminal voltages at individual lithium battery cells in a corresponding lithium battery group; an analog/digital converter that converts the terminal voltage having been output from the selection circuit from an analog value to a digital value; a digital comparator circuit that compares the digital value indicating the terminal voltage that has been output from the analog/digital converter with a voltage threshold value used for diagnosis of over-charge/over-discharge; a communication circuit that transmits a signal indicating an abnormality through the signal transmission path based upon a comparison result by the digital comparator circuit; a voltage generating circuit that generates a predetermined voltage; and a digital generating circuit that generates a digital value which is in a known magnitude relationship to the predetermined voltage, and wherein; each of the plurality of integrated circuits selects the predetermined voltage generated by the voltage generating circuit via the selection circuit, converts the predetermined voltage from an analog value to a digital value via the analog/digital converter, compares the digital value that has been output from the analog/digital converter with the digital value that has been output from the digital generating circuit via the digital comparator circuit, and, if the comparison result is different from the known magnitude relationship, transmits the abnormality signal from the communication circuit to the signal transmission path.
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20. A vehicle power supply system, comprising:
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a lithium battery module that is constituted with a plurality of serially connected lithium battery groups each include a plurality of serially connected lithium battery cells; a plurality of integrated circuits each of which is disposed in correspondence to the plurality of lithium battery groups and in each of which a plurality of circuits are integrated including a selection circuit, an analog/digital converter, a communication circuit, a diagnosis circuit, and a voltage generating circuit; and a signal transmission path through which signals that are input to or output from the plurality of integrated circuits are transmitted, and wherein; each of the plurality of integrated circuits selects via the selection circuit a terminal voltage from terminal voltages input from individual lithium battery cells in a corresponding lithium battery group, converts an analog value of the selected terminal voltage to a digital value via the analog/digital converter, and transmits the converted digital value of the terminal voltage from the communication circuit to the signal transmission path; and each of the plurality of integrated circuits selects via the selection circuit a predetermined voltage output from the voltage generating circuit, converts an analog value of the selected predetermined voltage to a digital value via the analog/digital converter, diagnoses whether or not an abnormality has occurred in the integrated circuits via the diagnosis circuit based upon the converted digital value of the predetermined voltage, and, if the diagnosis result indicates an abnormal state, transmits a signal indicating an abnormality from the communication circuit to the signal transmission path. - View Dependent Claims (21)
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22. A vehicle power supply system, comprising:
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a lithium battery module that is constituted with a plurality of serially connected lithium battery groups each include a plurality of serially connected lithium battery cells; a plurality of integrated circuits each of which is disposed in correspondence to the plurality of lithium battery groups and in each of which a plurality of circuits are integrated including a selection circuit, an analog/digital converter, a serial communication circuit, a one-bit communication circuit, a diagnosis circuit, and a voltage generating circuit; and a plurality of signal transmission paths through which signals that are input to or output from the plurality of integrated circuits are transmitted, and wherein; each of the plurality of integrated circuits selects via the selection circuit a terminal voltage from terminal voltages input from individual lithium battery cells in a corresponding lithium battery group, converts an analog value of the selected terminal voltage to a digital value via the analog/digital converter, and transmits the converted digital value of the terminal voltage from the serial communication circuit to one of the signal transmission paths; and each of the plurality of integrated circuits selects via the selection circuit a predetermined voltage output from the voltage generating circuit, converts an analog value of the selected predetermined voltage to a digital value via the analog/digital converter, diagnoses whether or not an abnormality has occurred in the integrated circuits via the diagnosis circuit based upon the converted digital value of the predetermined voltage, and, if the diagnosis result indicates an abnormal state, transmits a one-bit signal indicating an abnormality from the one-bit communication circuit to another one of the signal transmission paths. - View Dependent Claims (23)
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24. A vehicle power supply system, comprising:
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a lithium battery module that is constituted with a plurality of serially connected lithium battery groups each include a plurality of serially connected lithium battery cells; a plurality of integrated circuits each disposed in correspondence to the plurality of lithium battery groups; and a plurality of signal transmission paths through which signals that are input to or output from the plurality of integrated circuits are transmitted, wherein; each of the plurality of integrated circuits comprises; a selection circuit that selects a terminal voltage of measurement target from terminal voltages at individual lithium battery cells in a corresponding lithium battery group; an analog/digital converter that converts the terminal voltage having been output from the selection circuit from an analog value to a digital value; a digital comparator circuit that compares the digital value indicating the terminal voltage that has been output from the analog/digital converter with a voltage threshold value used for diagnosis of over-charge/over-discharge; a communication circuit that transmits the digital value of the terminal voltage and a signal indicating an abnormality; a voltage generating circuit that generates a predetermined voltage; and a digital generating circuit that generates a digital value which is in a known magnitude relationship to the predetermined voltage, and wherein; the communication circuit includes a serial transmission terminal and a one-bit signal transmission terminal; the serial transmission terminals are serially connected by electrically connecting a transmission side of a serial transmission terminal at one of the serially connected integrated circuits to a reception side of a serial transmission terminal at another one of the serially connected integrated circuits through one of the signal transmission paths; the one-bit signal transmission terminals are serially connected by electrically connecting a transmission side of a one-bit signal transmission terminal at one of the serially connected integrated circuits to a reception side of a one-bit signal transmission terminal at another one of the serially connected integrated circuits through another one of the signal transmission paths; each of the plurality of integrated circuits selects a predetermined voltage generated by the voltage generating circuit via the selection circuit, converts an analog value of the predetermined voltage to a digital value via the analog/digital converter, compares the digital value that has been output from the analog/digital converter with the digital value that has been output from the digital generating circuit via the digital comparator circuit, and, if the comparison result is different from the known magnitude relationship, transmits the abnormality signal from the communication circuit to another one of the signal transmission paths via the one-bit signal transmission terminal; and the abnormality signal transmitted from one of the plurality of integrated circuits is transmitted to another integrated circuit via the signal transmission path and input to the integrated circuit via a reception side of a one-bit signal transmission terminal of the integrated circuit.
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25. An integrated circuit for controlling battery cell that is an integrated circuit electrically connected to a plurality of battery cells serially connected and disposed to measure terminal voltages at the individual battery cells, comprising:
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a plurality of voltage receiving terminals through which terminal voltages at the individual battery cells are taken in; a voltage measurement circuit that measures terminal voltages at the individual battery cells taken in through the plurality of voltage-receiving terminals; a timing control circuit that outputs a signal for instructing measurement phase during which the terminal voltage is measured and, in synchronization with output of the measurement phase instruction signal, outputs a signal for instructing diagnosis phase during which an abnormality diagnosis is executed; an abnormality diagnosis circuit that diagnoses an abnormality in the integrated circuit in synchronization with the terminal voltage measurement based upon the diagnosis phase instruction signal; a communication circuit that transmits a signal indicating the terminal voltage measured by the voltage measurement circuit and a signal based upon a diagnosis result by the abnormality diagnosis circuit; and a signal terminal that is electrically connected to the communication circuit so as to transmit/receive a signal.
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26. An integrated circuit for controlling battery cell that is an integrated circuit electrically connected to a plurality of battery cells serially connected and disposed to measure terminal voltages at the individual battery cells, comprising:
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a plurality of voltage receiving terminals through which terminal voltages at the individual battery cells are taken in; a voltage measurement circuit that measures terminal voltages at the individual battery cells taken in through the plurality of voltage receiving terminals; a comparator circuit that compares a terminal voltage value output from the voltage measurement circuit with a voltage threshold value used for diagnosis of over-charge/over-discharge of the battery cells; a diagnosis result output circuit that outputs a signal indicating diagnosis result corresponding to the over-charge/over-discharge if a diagnosis result based upon a comparison result by the comparator circuit indicates the over-charge/over-discharge; a comparison value generating circuit that generates a comparison value which is used for abnormality diagnosis in integrated circuits and which is in a known magnitude relationship to a predetermined input value that is input to the comparator circuit; a communication circuit that outputs a signal indicating the terminal voltage measured by the voltage measurement circuit and an abnormality signal based upon the diagnosis result signal; and a signal terminal that is electrically connected to the communication circuit so as to transmit/receive a signal, and wherein; the integrated circuit for controlling battery cell compares an input value that is input to the comparator circuit with the comparison value via the comparator circuit, and, if the comparison result is different from the known magnitude relationship, judges that an abnormality has occurred in the integrated circuit and outputs the diagnosis result signal corresponding to the abnormality in the integrated circuit from the diagnosis result output circuit.
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27. An integrated circuit for controlling battery cell that is an integrated circuit electrically connected to a plurality of battery cells serially connected and disposed to measure terminal voltages at the individual battery cells, comprising:
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a plurality of voltage receiving terminals through which terminal voltages at the individual battery cells are taken in; a voltage measurement circuit that measures terminal voltages at the individual battery cells taken in through the plurality of voltage receiving terminals; a comparator circuit that compares a terminal voltage value output from the voltage measurement circuit with a voltage threshold value used for diagnosis of over-charge/over-discharge of the battery cells; a diagnosis result output circuit that outputs a signal indicating diagnosis result corresponding to the over-charge/over-discharge if a diagnosis result based upon a comparison result by the comparator circuit indicates the over-charge/over-discharge; a comparison value generating circuit that generates a comparison value which is used for an abnormality diagnosis in the integrated circuits and which is in a known magnitude relationship to a predetermined input value that is input to the comparator circuit; a communication circuit that outputs a signal indicating the terminal voltage measured by the voltage measurement circuit and an abnormality signal based upon the diagnosis result signal to the signal transmission path; a timing control circuit that outputs a signal for instructing measurement phase during which the terminal voltage is measured, and, in synchronization with output of the measurement phase instruction signal, outputs a signal for instructing diagnosis phase during which an abnormality diagnosis is executed in integrated circuits; and a signal terminal that is electrically connected to the communication circuit so as to transmit/receive a signal, wherein; the integrated circuit for controlling battery cell executes a first diagnosis for diagnosing an abnormality in the integrated circuit in synchronization with measurement of the terminal voltage based upon the diagnosis phase instruction signal and a second diagnosis for diagnosing an abnormality in the integrated circuit based upon whether or not a comparison result of an input value that is input to the comparator circuit with the comparison value via the comparator circuit is different from the known magnitude relationship, and, if there is an abnormality in the integrated circuit, outputs the diagnosis result signal corresponding to the abnormality in the integrated circuit from the diagnosis result output circuit and outputs the abnormality signal based upon the output diagnosis result signal from the communication circuit through the transmission terminal.
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28. An integrated circuit for controlling battery cell that is an integrated circuit electrically connected to a plurality of lithium battery cells serially connected and disposed to measure terminal voltages at the individual lithium battery cells, comprising:
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a plurality of voltage receiving terminals; a signal transmission/reception terminal; a selection circuit; an analog/digital converter; a communication circuit; a diagnosis circuit; and a voltage generating circuit, wherein; the integrated circuit for controlling battery cell is configured to select via the selection circuit a terminal voltage from terminal voltages input from the individual lithium battery cells via the plurality of voltage receiving terminals, to convert an analog value of the selected terminal voltage to a digital value via the analog/digital converter, and to transmit the converted digital value of the terminal voltage from the communication circuit via the signal transmission terminal; and the integrated circuit for controlling battery cell selects via the selection circuit a predetermined voltage output from the voltage generating circuit, converts an analog value of the selected predetermined voltage to a digital value via the analog/digital converter, diagnoses whether or not an abnormality has occurred in the integrated circuit via the diagnosis circuit based upon the converted digital value of the predetermined voltage, and, if the diagnosis result indicates an abnormal state, transmits a signal indicating an abnormality from the communication circuit via the signal transmission terminal.
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29. An integrated circuit for controlling battery cell that is an integrated circuit electrically connected to a plurality of lithium battery cells serially connected and disposed to measure terminal voltages at the individual lithium battery cells, comprising:
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a plurality of voltage receiving terminals; a plurality of signal transmission/reception terminals; a selection circuit; an analog/digital converter; a serial communication circuit; a one-bit communication circuit; a diagnosis circuit; and a voltage generating circuit, wherein; the integrated circuit for controlling battery cell is configured to select via the selection circuit a terminal voltage from terminal voltages input from the individual lithium battery cells via the plurality of voltage receiving terminals, to convert an analog value of the selected terminal voltage to a digital value via the analog/digital converter, and to transmit the converted digital value of the terminal voltage from the serial communication circuit via one of the plurality of signal transmission terminals; and the integrated circuit for controlling battery cell selects via the selection circuit a predetermined voltage output from the voltage generating circuit, converts an analog value of the selected predetermined voltage to a digital value via the analog/digital converter, diagnoses whether or not an abnormality has occurred in the integrated circuit via the diagnosis circuit based upon the converted digital value of the predetermined voltage, and, if the diagnosis result indicates an abnormal state, transmit a signal indicating an abnormality from the one-bit communication circuit via another one of the plurality of the signal transmission terminals.
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30. An integrated circuit for controlling battery cell that is an integrated circuit electrically connected to a plurality of lithium battery cells serially connected and disposed to measure terminal voltages at the individual lithium battery cells, comprising:
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a plurality of voltage receiving terminals; a signal transmission/reception terminal; a selection circuit; an analog/digital converter; a communication circuit; a diagnosis circuit; a digital comparator circuit; and a digital value output circuit, wherein; the integrated circuit for controlling battery cell is configured to select via the selection circuit a terminal voltage from terminal voltages input from the individual lithium battery cells via the plurality of voltage receiving terminals, to convert an analog value of the selected terminal voltage to a digital value via the analog/digital converter, and to transmit the converted digital value of the terminal voltage from the communication circuit via the signal transmission terminal; and the integrated circuit for controlling battery cell outputs from the digital value output circuit a first digital value and a second digital value which is in a predetermined magnitude relationship to the first digital value, compares the first and second digital values via the digital comparator circuit, diagnoses whether or not an abnormality has occurred in the integrated circuit via the diagnosis circuit based upon whether or not the comparison result is in the predetermined magnitude relationship, and, if the diagnosis result indicates an abnormal state, transmits a signal indicating an abnormality from the communication circuit via the signal transmission terminal.
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Specification