Method and system of modeling energy flow for vehicle battery diagnostic monitoring

摘要

A lead acid battery model suitable for programming on a motor vehicle body computer uses environmental and target battery operating variables for maintaining synchronization of the model with the target battery under actual operating conditions. The model includes a energy flow section with at least two integrators for simulating primary and recovery reservoirs of charge in the battery. An output voltage estimation signal provides a signal for comparison with measured battery voltage for synchronization. Capacity of the reservoirs is generated from manufacturer specifications measured against battery performance.