| 20100094575 | METHOD FOR DIAGNOSING THE LEAD-ACID BATTERY OF AN AUTOMOBILE AND SYSTEM FOR IMPLEMENTING THE SAME - A method for diagnosing a lead-acid battery of an automotive vehicle includes an experimentation phase in which parameterization of the state of health (SOH) of a lead-acid battery for different values of the state of charge (SOC) of the battery is conducted, and a diagnosis phase in which the battery temperature during the start-up phase of the vehicle is measured and, after the first discharge and over a given range of current variation, the corresponding voltage (U) and current (I) is measured, to deduce therefrom after processing, a value of parameter (γ) of the battery. The state of charge (SOC) of the battery is then determined, and the value representing the state of health is determined, so as to establish a diagnosis of the battery. | 04-15-2010 |
