The battery state judging method, a battery control device, and a battery pack

Title:

The battery state judging method, a battery control device, and a battery pack

Document Type and Number:

Japanese Patent JP5949146

Kind Code:

B2

Abstract:

A battery pack has a plurality of batteries installed therein which are connected in series and equipped with a current-interrupting mechanism and a battery body. A battery-control ECU calculates a time derivative (S1) by using a current value detected by a current sensor, and determines whether the absolute value of the time derivative is larger than a prescribed threshold (S2). When the absolute value is determined to be larger than the threshold (Y at S2), an estimation of the internal-resistance value of the battery is made (S3), and it is determined whether the estimated value falls within a prescribed range (S4). As a result, when the time derivative is larger than the threshold and the estimated value of the internal-resistance value falls outside the prescribed range (Y at S4), the battery-control ECU determines the current-interrupting mechanism is operating (S5).

Inventors:

Hiroyuki Nomura
Kuraishi Mamoru
Hiromasa Yoshizawa
Takahiro Tsuchi
Matsui Masayoshi

Application Number:

JP2012116496A

Publication Date:

July 06, 2016

Filing Date:

May 22, 2012

Export Citation:

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