Device, method, and non-transitory recording medium storing program for specifying abnormality-occurrence area of secondary battery system
First Claim
1. A method of identifying a position of an abnormality occurred in a secondary battery system, the secondary battery system comprising a plurality of modules each accommodating one or more blocks, the blocks each being formed by connecting battery cells of two or more secondary batteries, the method comprising the steps of:
- performing voltage measurement by detecting voltage of the secondary batteries on a block by block basis, and outputting the detected voltage as a block voltage value;
performing string current measurement by measuring electric current of a module string formed by connecting the plurality of modules in series to output the measured electric current as a string current value;
performing information acquisition by acquiring module information of, among the plurality of modules included in the module string, a module accommodating a block where a difference between the block voltage value and the block voltage value with a first-order lag has been changed to exceed a voltage threshold value in a predetermined time period around a time point at which correlation between the block voltage value and the string current value is lost;
performing report reception by receiving a report of an abnormality occurred in the secondary batteries; and
performing module identification by identifying, as a module having the abnormality, the module corresponding to the module information at time of receiving the report in the report reception step.
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Accused Products
Abstract
An apparatus for identifying a position of an abnormality occurred in a secondary battery system includes an information acquisition unit for acquiring information about a module (module information) from among a plurality of modules included in a module series that accommodates a block for which the difference between a block voltage value and a block voltage value after a primary delay has changed so as to exceed a voltage threshold within a preset time before and after the point in time at which the block voltage value and series current value stopped being correlated, a notification reception unit for receiving a notification about the occurrence of an abnormality in a secondary battery, and a module specification unit for specifying at least the module corresponding to the latest module information as the module in which an abnormality occurred when the notification reception unit receives a notification.
10 Citations
6 Claims
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1. A method of identifying a position of an abnormality occurred in a secondary battery system, the secondary battery system comprising a plurality of modules each accommodating one or more blocks, the blocks each being formed by connecting battery cells of two or more secondary batteries, the method comprising the steps of:
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performing voltage measurement by detecting voltage of the secondary batteries on a block by block basis, and outputting the detected voltage as a block voltage value; performing string current measurement by measuring electric current of a module string formed by connecting the plurality of modules in series to output the measured electric current as a string current value; performing information acquisition by acquiring module information of, among the plurality of modules included in the module string, a module accommodating a block where a difference between the block voltage value and the block voltage value with a first-order lag has been changed to exceed a voltage threshold value in a predetermined time period around a time point at which correlation between the block voltage value and the string current value is lost; performing report reception by receiving a report of an abnormality occurred in the secondary batteries; and performing module identification by identifying, as a module having the abnormality, the module corresponding to the module information at time of receiving the report in the report reception step. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification