Battery monitoring apparatus
First Claim
1. A battery monitoring apparatus for monitoring a battery condition of an assembled battery formed of a plurality of battery cells connected in series, comprising:
- a monitoring unit that is powered by the assembled battery and monitors the battery condition of the assembled battery; and
a control unit that acquires a monitoring result indicative of the battery condition of the assembled battery from the monitoring unit and controls the operation of the monitoring unit on the basis of the monitoring result;
wherein the monitoring unit transitions from a normal mode, in which power supply from the assembled battery to the monitoring unit is maintained, to a dark-current mode, in which power supply from the assembled battery to the monitoring unit is partially interrupted, in response to a first mode-switching instruction signal from the control unit for instructing the monitoring unit to transition from the normal mode to the dark-current mode, and transitions from the dark-current mode to the normal mode in response to a second mode-switching instruction signal from the control unit for instructing the monitoring unit to transition from the dark-current mode to the normal mode, and the monitoring unit comprises a timer circuit that starts time counting in synchrony with transition from the dark-current mode to the normal mode of the monitoring unit and stops time counting in synchrony with transition from the normal mode to the dark-current mode of the monitoring unit, andthe control unit transmits the second mode-switching instruction signal for instructing the monitoring unit to transition from the dark-current mode to the normal mode to the monitoring unit, subsequently acquires an increased count value of the timer circuit for a time period from transmission of the first mode-switching instruction signal to transmission of the second mode-switching instruction signal, and when the increased count value is greater than an abnormality diagnosis criterion value (α
), then determines that the dark-current mode of the monitoring unit is malfunctioning.
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Accused Products
Abstract
A battery monitoring apparatus for monitoring a battery condition of an assembled battery. In the apparatus, a control unit transmits, to a monitoring unit that is powered by the assembled battery and monitors its battery condition, a first mode-switching instruction signal for instructing the monitoring unit to transition from a normal mode to a dark-current mode. Subsequently, the control unit transmits to the monitoring unit a second mode-switching signal for instructing the monitoring unit to transition from the dark-current mode to the normal mode, and acquires an increased count value of a timer circuit in the monitoring unit for a time period from transmission of the first mode-switching instruction signal to transmission of the second mode-switching instruction signal. When it is determined that the increased count value is greater than an abnormality diagnosis criterion value, then the control unit determines that the dark-current mode of the monitoring unit is malfunctioning.
17 Citations
21 Claims
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1. A battery monitoring apparatus for monitoring a battery condition of an assembled battery formed of a plurality of battery cells connected in series, comprising:
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a monitoring unit that is powered by the assembled battery and monitors the battery condition of the assembled battery; and a control unit that acquires a monitoring result indicative of the battery condition of the assembled battery from the monitoring unit and controls the operation of the monitoring unit on the basis of the monitoring result; wherein the monitoring unit transitions from a normal mode, in which power supply from the assembled battery to the monitoring unit is maintained, to a dark-current mode, in which power supply from the assembled battery to the monitoring unit is partially interrupted, in response to a first mode-switching instruction signal from the control unit for instructing the monitoring unit to transition from the normal mode to the dark-current mode, and transitions from the dark-current mode to the normal mode in response to a second mode-switching instruction signal from the control unit for instructing the monitoring unit to transition from the dark-current mode to the normal mode, and the monitoring unit comprises a timer circuit that starts time counting in synchrony with transition from the dark-current mode to the normal mode of the monitoring unit and stops time counting in synchrony with transition from the normal mode to the dark-current mode of the monitoring unit, and the control unit transmits the second mode-switching instruction signal for instructing the monitoring unit to transition from the dark-current mode to the normal mode to the monitoring unit, subsequently acquires an increased count value of the timer circuit for a time period from transmission of the first mode-switching instruction signal to transmission of the second mode-switching instruction signal, and when the increased count value is greater than an abnormality diagnosis criterion value (α
), then determines that the dark-current mode of the monitoring unit is malfunctioning. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification