Method for diagnosing the storage cells of a traction battery of an electric or hybrid motor vehicle

Abstract

Method for diagnosing (100) the storage cells (210) of a traction battery (200) of an electric or hybrid motor vehicle (300), If the vehicle (300) is in an inactive state, implementing the following steps: A step of stopping (120) the cell balancing method when it is active; For each cell (210) of said battery (200), a step of measuring (130) the variation of the open-circuit voltage at the terminals of said cell (210) over a first predetermined duration; When said predetermined duration is reached, a step of detecting (140) a faulty cell when a variation of the open-circuit voltage measured at its terminals during the first predetermined duration is greater than a limit threshold, and If a faulty cell is detected, a step of transmitting (150) an alert. Abstract figure: Figure 1

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