Abnormal voltage detector apparatus for detecting voltage abnormality in assembled battery
First Claim
1. An abnormal voltage detector apparatus for use in an assembled battery comprising a plurality of battery blocks connected in series to each other, said abnormal voltage detector apparatus detecting voltage abnormality in said assembled battery, each battery block comprising at least one secondary battery, said abnormal voltage detector apparatus comprising:
- a detecting part;
for detecting whether or not each of said battery blocks is in a voltage abnormality state by comparing one of a voltage of said each battery block and each battery measuring voltage with a predetermined reference-voltage, wherein each battery measuring voltage is lowered from a voltage of each associated battery block,for generating abnormality detecting signals for each battery block, each abnormality detecting signal containing information about a detected result,for calculating a time ratio of a time interval, for which said assembled battery is in a voltage abnormality state, to a predetermined time interval, based on the abnormality detecting signals, andfor detecting a voltage abnormality of said assembled battery based on the calculated time ratio.
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Abstract
An abnormal voltage detector apparatus is provided for an assembled battery including a plurality of battery blocks connected in series to each other. In the abnormal voltage detector apparatus, a detecting part detects whether or not each of the battery blocks is in a voltage abnormality state by comparing either one of a voltage of each battery block and each battery measuring voltage, that is a voltage lowered from the voltage of each battery block, with a predetermined reference voltage, generates each of abnormality detecting signals containing information about a detected result, calculates a time ratio of a time interval, for which the assembled battery is in a voltage abnormality state, to a predetermined time interval, based on the abnormality detecting signals, and detects a voltage abnormality of the assembled battery based on a calculated time ratio.
21 Citations
14 Claims
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1. An abnormal voltage detector apparatus for use in an assembled battery comprising a plurality of battery blocks connected in series to each other, said abnormal voltage detector apparatus detecting voltage abnormality in said assembled battery, each battery block comprising at least one secondary battery, said abnormal voltage detector apparatus comprising:
a detecting part; for detecting whether or not each of said battery blocks is in a voltage abnormality state by comparing one of a voltage of said each battery block and each battery measuring voltage with a predetermined reference-voltage, wherein each battery measuring voltage is lowered from a voltage of each associated battery block, for generating abnormality detecting signals for each battery block, each abnormality detecting signal containing information about a detected result, for calculating a time ratio of a time interval, for which said assembled battery is in a voltage abnormality state, to a predetermined time interval, based on the abnormality detecting signals, and for detecting a voltage abnormality of said assembled battery based on the calculated time ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An abnormal voltage detector apparatus comprising:
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a plurality of abnormal voltage detectors, each abnormal voltage detector connected to a different battery block in an assembled battery, each battery block including a plurality of secondary batteries; wherein each abnormal voltage detector generates an abnormality detecting signal that contains information about each the corresponding battery block; wherein the abnormality detecting signals are logically summed and sampled during a first time period; wherein a ratio of voltage abnormality is determined by dividing a number of samples that indicate abnormal voltage by a total number of samples during the first time period; wherein an abnormal voltage is determined if the ratio is above a threshold ratio.
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Specification