組電池の異常判定装置および異常判定方法

Title:

組電池の異常判定装置および異常判定方法

Document Type and Number:

Japanese Patent JP4030217

Kind Code:

B2

Abstract:

By finding a voltage difference DELTA V between the maximum value and the minimum value of voltage of each cell constituting a battery set and then combining the voltage difference DELTA V with current I passing through the battery set into a value pair and store a plurality of the value pairs, the relationship between the voltage difference DELTA V and the current I is a relation represented by a straight line with the slope DELTA R thereof corresponding to an internal-resistance difference. Therefore, fault in the battery set can be determined from the magnitude of the slope DELTA R computed by a least-squares method. Fault determination for a battery set is made more accurate because variations in electromotive force caused by charge-and-discharge patterns and by changes in temperature are canceled when the voltage difference DELTA V is determined.

Inventors:

Yoshiaki Kikuchi
Shigehiro Kawauchi

Application Number:

JP6622299A

Publication Date:

January 09, 2008

Filing Date:

March 12, 1999

Export Citation:

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